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Diffstat (limited to 'deps/LuaJIT/src/vm_x86.dasc')
| -rw-r--r-- | deps/LuaJIT/src/vm_x86.dasc | 5780 |
1 files changed, 0 insertions, 5780 deletions
diff --git a/deps/LuaJIT/src/vm_x86.dasc b/deps/LuaJIT/src/vm_x86.dasc deleted file mode 100644 index 211ae7b..0000000 --- a/deps/LuaJIT/src/vm_x86.dasc +++ /dev/null @@ -1,5780 +0,0 @@ -|// Low-level VM code for x86 CPUs. -|// Bytecode interpreter, fast functions and helper functions. -|// Copyright (C) 2005-2017 Mike Pall. See Copyright Notice in luajit.h -| -|.if P64 -|.arch x64 -|.else -|.arch x86 -|.endif -|.section code_op, code_sub -| -|.actionlist build_actionlist -|.globals GLOB_ -|.globalnames globnames -|.externnames extnames -| -|//----------------------------------------------------------------------- -| -|.if P64 -|.define X64, 1 -|.if WIN -|.define X64WIN, 1 -|.endif -|.endif -| -|// Fixed register assignments for the interpreter. -|// This is very fragile and has many dependencies. Caveat emptor. -|.define BASE, edx // Not C callee-save, refetched anyway. -|.if not X64 -|.define KBASE, edi // Must be C callee-save. -|.define KBASEa, KBASE -|.define PC, esi // Must be C callee-save. -|.define PCa, PC -|.define DISPATCH, ebx // Must be C callee-save. -|.elif X64WIN -|.define KBASE, edi // Must be C callee-save. -|.define KBASEa, rdi -|.define PC, esi // Must be C callee-save. -|.define PCa, rsi -|.define DISPATCH, ebx // Must be C callee-save. -|.else -|.define KBASE, r15d // Must be C callee-save. -|.define KBASEa, r15 -|.define PC, ebx // Must be C callee-save. -|.define PCa, rbx -|.define DISPATCH, r14d // Must be C callee-save. -|.endif -| -|.define RA, ecx -|.define RAH, ch -|.define RAL, cl -|.define RB, ebp // Must be ebp (C callee-save). -|.define RC, eax // Must be eax. -|.define RCW, ax -|.define RCH, ah -|.define RCL, al -|.define OP, RB -|.define RD, RC -|.define RDW, RCW -|.define RDL, RCL -|.if X64 -|.define RAa, rcx -|.define RBa, rbp -|.define RCa, rax -|.define RDa, rax -|.else -|.define RAa, RA -|.define RBa, RB -|.define RCa, RC -|.define RDa, RD -|.endif -| -|.if not X64 -|.define FCARG1, ecx // x86 fastcall arguments. -|.define FCARG2, edx -|.elif X64WIN -|.define CARG1, rcx // x64/WIN64 C call arguments. -|.define CARG2, rdx -|.define CARG3, r8 -|.define CARG4, r9 -|.define CARG1d, ecx -|.define CARG2d, edx -|.define CARG3d, r8d -|.define CARG4d, r9d -|.define FCARG1, CARG1d // Upwards compatible to x86 fastcall. -|.define FCARG2, CARG2d -|.else -|.define CARG1, rdi // x64/POSIX C call arguments. -|.define CARG2, rsi -|.define CARG3, rdx -|.define CARG4, rcx -|.define CARG5, r8 -|.define CARG6, r9 -|.define CARG1d, edi -|.define CARG2d, esi -|.define CARG3d, edx -|.define CARG4d, ecx -|.define CARG5d, r8d -|.define CARG6d, r9d -|.define FCARG1, CARG1d // Simulate x86 fastcall. -|.define FCARG2, CARG2d -|.endif -| -|// Type definitions. Some of these are only used for documentation. -|.type L, lua_State -|.type GL, global_State -|.type TVALUE, TValue -|.type GCOBJ, GCobj -|.type STR, GCstr -|.type TAB, GCtab -|.type LFUNC, GCfuncL -|.type CFUNC, GCfuncC -|.type PROTO, GCproto -|.type UPVAL, GCupval -|.type NODE, Node -|.type NARGS, int -|.type TRACE, GCtrace -|.type SBUF, SBuf -| -|// Stack layout while in interpreter. Must match with lj_frame.h. -|//----------------------------------------------------------------------- -|.if not X64 // x86 stack layout. -| -|.if WIN -| -|.define CFRAME_SPACE, aword*9 // Delta for esp (see <--). -|.macro saveregs_ -| push edi; push esi; push ebx -| push extern lj_err_unwind_win -| fs; push dword [0] -| fs; mov [0], esp -| sub esp, CFRAME_SPACE -|.endmacro -|.macro restoreregs -| add esp, CFRAME_SPACE -| fs; pop dword [0] -| pop edi // Short for esp += 4. -| pop ebx; pop esi; pop edi; pop ebp -|.endmacro -| -|.else -| -|.define CFRAME_SPACE, aword*7 // Delta for esp (see <--). -|.macro saveregs_ -| push edi; push esi; push ebx -| sub esp, CFRAME_SPACE -|.endmacro -|.macro restoreregs -| add esp, CFRAME_SPACE -| pop ebx; pop esi; pop edi; pop ebp -|.endmacro -| -|.endif -| -|.macro saveregs -| push ebp; saveregs_ -|.endmacro -| -|.if WIN -|.define SAVE_ERRF, aword [esp+aword*19] // vm_pcall/vm_cpcall only. -|.define SAVE_NRES, aword [esp+aword*18] -|.define SAVE_CFRAME, aword [esp+aword*17] -|.define SAVE_L, aword [esp+aword*16] -|//----- 16 byte aligned, ^^^ arguments from C caller -|.define SAVE_RET, aword [esp+aword*15] //<-- esp entering interpreter. -|.define SAVE_R4, aword [esp+aword*14] -|.define SAVE_R3, aword [esp+aword*13] -|.define SAVE_R2, aword [esp+aword*12] -|//----- 16 byte aligned -|.define SAVE_R1, aword [esp+aword*11] -|.define SEH_FUNC, aword [esp+aword*10] -|.define SEH_NEXT, aword [esp+aword*9] //<-- esp after register saves. -|.define UNUSED2, aword [esp+aword*8] -|//----- 16 byte aligned -|.define UNUSED1, aword [esp+aword*7] -|.define SAVE_PC, aword [esp+aword*6] -|.define TMP2, aword [esp+aword*5] -|.define TMP1, aword [esp+aword*4] -|//----- 16 byte aligned -|.define ARG4, aword [esp+aword*3] -|.define ARG3, aword [esp+aword*2] -|.define ARG2, aword [esp+aword*1] -|.define ARG1, aword [esp] //<-- esp while in interpreter. -|//----- 16 byte aligned, ^^^ arguments for C callee -|.else -|.define SAVE_ERRF, aword [esp+aword*15] // vm_pcall/vm_cpcall only. -|.define SAVE_NRES, aword [esp+aword*14] -|.define SAVE_CFRAME, aword [esp+aword*13] -|.define SAVE_L, aword [esp+aword*12] -|//----- 16 byte aligned, ^^^ arguments from C caller -|.define SAVE_RET, aword [esp+aword*11] //<-- esp entering interpreter. -|.define SAVE_R4, aword [esp+aword*10] -|.define SAVE_R3, aword [esp+aword*9] -|.define SAVE_R2, aword [esp+aword*8] -|//----- 16 byte aligned -|.define SAVE_R1, aword [esp+aword*7] //<-- esp after register saves. -|.define SAVE_PC, aword [esp+aword*6] -|.define TMP2, aword [esp+aword*5] -|.define TMP1, aword [esp+aword*4] -|//----- 16 byte aligned -|.define ARG4, aword [esp+aword*3] -|.define ARG3, aword [esp+aword*2] -|.define ARG2, aword [esp+aword*1] -|.define ARG1, aword [esp] //<-- esp while in interpreter. -|//----- 16 byte aligned, ^^^ arguments for C callee -|.endif -| -|// FPARGx overlaps ARGx and ARG(x+1) on x86. -|.define FPARG3, qword [esp+qword*1] -|.define FPARG1, qword [esp] -|// TMPQ overlaps TMP1/TMP2. ARG5/MULTRES overlap TMP1/TMP2 (and TMPQ). -|.define TMPQ, qword [esp+aword*4] -|.define TMP3, ARG4 -|.define ARG5, TMP1 -|.define TMPa, TMP1 -|.define MULTRES, TMP2 -| -|// Arguments for vm_call and vm_pcall. -|.define INARG_BASE, SAVE_CFRAME // Overwritten by SAVE_CFRAME! -| -|// Arguments for vm_cpcall. -|.define INARG_CP_CALL, SAVE_ERRF -|.define INARG_CP_UD, SAVE_NRES -|.define INARG_CP_FUNC, SAVE_CFRAME -| -|//----------------------------------------------------------------------- -|.elif X64WIN // x64/Windows stack layout -| -|.define CFRAME_SPACE, aword*5 // Delta for rsp (see <--). -|.macro saveregs_ -| push rdi; push rsi; push rbx -| sub rsp, CFRAME_SPACE -|.endmacro -|.macro saveregs -| push rbp; saveregs_ -|.endmacro -|.macro restoreregs -| add rsp, CFRAME_SPACE -| pop rbx; pop rsi; pop rdi; pop rbp -|.endmacro -| -|.define SAVE_CFRAME, aword [rsp+aword*13] -|.define SAVE_PC, dword [rsp+dword*25] -|.define SAVE_L, dword [rsp+dword*24] -|.define SAVE_ERRF, dword [rsp+dword*23] -|.define SAVE_NRES, dword [rsp+dword*22] -|.define TMP2, dword [rsp+dword*21] -|.define TMP1, dword [rsp+dword*20] -|//----- 16 byte aligned, ^^^ 32 byte register save area, owned by interpreter -|.define SAVE_RET, aword [rsp+aword*9] //<-- rsp entering interpreter. -|.define SAVE_R4, aword [rsp+aword*8] -|.define SAVE_R3, aword [rsp+aword*7] -|.define SAVE_R2, aword [rsp+aword*6] -|.define SAVE_R1, aword [rsp+aword*5] //<-- rsp after register saves. -|.define ARG5, aword [rsp+aword*4] -|.define CSAVE_4, aword [rsp+aword*3] -|.define CSAVE_3, aword [rsp+aword*2] -|.define CSAVE_2, aword [rsp+aword*1] -|.define CSAVE_1, aword [rsp] //<-- rsp while in interpreter. -|//----- 16 byte aligned, ^^^ 32 byte register save area, owned by callee -| -|// TMPQ overlaps TMP1/TMP2. MULTRES overlaps TMP2 (and TMPQ). -|.define TMPQ, qword [rsp+aword*10] -|.define MULTRES, TMP2 -|.define TMPa, ARG5 -|.define ARG5d, dword [rsp+aword*4] -|.define TMP3, ARG5d -| -|//----------------------------------------------------------------------- -|.else // x64/POSIX stack layout -| -|.define CFRAME_SPACE, aword*5 // Delta for rsp (see <--). -|.macro saveregs_ -| push rbx; push r15; push r14 -|.if NO_UNWIND -| push r13; push r12 -|.endif -| sub rsp, CFRAME_SPACE -|.endmacro -|.macro saveregs -| push rbp; saveregs_ -|.endmacro -|.macro restoreregs -| add rsp, CFRAME_SPACE -|.if NO_UNWIND -| pop r12; pop r13 -|.endif -| pop r14; pop r15; pop rbx; pop rbp -|.endmacro -| -|//----- 16 byte aligned, -|.if NO_UNWIND -|.define SAVE_RET, aword [rsp+aword*11] //<-- rsp entering interpreter. -|.define SAVE_R4, aword [rsp+aword*10] -|.define SAVE_R3, aword [rsp+aword*9] -|.define SAVE_R2, aword [rsp+aword*8] -|.define SAVE_R1, aword [rsp+aword*7] -|.define SAVE_RU2, aword [rsp+aword*6] -|.define SAVE_RU1, aword [rsp+aword*5] //<-- rsp after register saves. -|.else -|.define SAVE_RET, aword [rsp+aword*9] //<-- rsp entering interpreter. -|.define SAVE_R4, aword [rsp+aword*8] -|.define SAVE_R3, aword [rsp+aword*7] -|.define SAVE_R2, aword [rsp+aword*6] -|.define SAVE_R1, aword [rsp+aword*5] //<-- rsp after register saves. -|.endif -|.define SAVE_CFRAME, aword [rsp+aword*4] -|.define SAVE_PC, dword [rsp+dword*7] -|.define SAVE_L, dword [rsp+dword*6] -|.define SAVE_ERRF, dword [rsp+dword*5] -|.define SAVE_NRES, dword [rsp+dword*4] -|.define TMPa, aword [rsp+aword*1] -|.define TMP2, dword [rsp+dword*1] -|.define TMP1, dword [rsp] //<-- rsp while in interpreter. -|//----- 16 byte aligned -| -|// TMPQ overlaps TMP1/TMP2. MULTRES overlaps TMP2 (and TMPQ). -|.define TMPQ, qword [rsp] -|.define TMP3, dword [rsp+aword*1] -|.define MULTRES, TMP2 -| -|.endif -| -|//----------------------------------------------------------------------- -| -|// Instruction headers. -|.macro ins_A; .endmacro -|.macro ins_AD; .endmacro -|.macro ins_AJ; .endmacro -|.macro ins_ABC; movzx RB, RCH; movzx RC, RCL; .endmacro -|.macro ins_AB_; movzx RB, RCH; .endmacro -|.macro ins_A_C; movzx RC, RCL; .endmacro -|.macro ins_AND; not RDa; .endmacro -| -|// Instruction decode+dispatch. Carefully tuned (nope, lodsd is not faster). -|.macro ins_NEXT -| mov RC, [PC] -| movzx RA, RCH -| movzx OP, RCL -| add PC, 4 -| shr RC, 16 -|.if X64 -| jmp aword [DISPATCH+OP*8] -|.else -| jmp aword [DISPATCH+OP*4] -|.endif -|.endmacro -| -|// Instruction footer. -|.if 1 -| // Replicated dispatch. Less unpredictable branches, but higher I-Cache use. -| .define ins_next, ins_NEXT -| .define ins_next_, ins_NEXT -|.else -| // Common dispatch. Lower I-Cache use, only one (very) unpredictable branch. -| // Affects only certain kinds of benchmarks (and only with -j off). -| // Around 10%-30% slower on Core2, a lot more slower on P4. -| .macro ins_next -| jmp ->ins_next -| .endmacro -| .macro ins_next_ -| ->ins_next: -| ins_NEXT -| .endmacro -|.endif -| -|// Call decode and dispatch. -|.macro ins_callt -| // BASE = new base, RB = LFUNC, RD = nargs+1, [BASE-4] = PC -| mov PC, LFUNC:RB->pc -| mov RA, [PC] -| movzx OP, RAL -| movzx RA, RAH -| add PC, 4 -|.if X64 -| jmp aword [DISPATCH+OP*8] -|.else -| jmp aword [DISPATCH+OP*4] -|.endif -|.endmacro -| -|.macro ins_call -| // BASE = new base, RB = LFUNC, RD = nargs+1 -| mov [BASE-4], PC -| ins_callt -|.endmacro -| -|//----------------------------------------------------------------------- -| -|// Macros to test operand types. -|.macro checktp, reg, tp; cmp dword [BASE+reg*8+4], tp; .endmacro -|.macro checknum, reg, target; checktp reg, LJ_TISNUM; jae target; .endmacro -|.macro checkint, reg, target; checktp reg, LJ_TISNUM; jne target; .endmacro -|.macro checkstr, reg, target; checktp reg, LJ_TSTR; jne target; .endmacro -|.macro checktab, reg, target; checktp reg, LJ_TTAB; jne target; .endmacro -| -|// These operands must be used with movzx. -|.define PC_OP, byte [PC-4] -|.define PC_RA, byte [PC-3] -|.define PC_RB, byte [PC-1] -|.define PC_RC, byte [PC-2] -|.define PC_RD, word [PC-2] -| -|.macro branchPC, reg -| lea PC, [PC+reg*4-BCBIAS_J*4] -|.endmacro -| -|// Assumes DISPATCH is relative to GL. -#define DISPATCH_GL(field) (GG_DISP2G + (int)offsetof(global_State, field)) -#define DISPATCH_J(field) (GG_DISP2J + (int)offsetof(jit_State, field)) -| -#define PC2PROTO(field) ((int)offsetof(GCproto, field)-(int)sizeof(GCproto)) -| -|// Decrement hashed hotcount and trigger trace recorder if zero. -|.macro hotloop, reg -| mov reg, PC -| shr reg, 1 -| and reg, HOTCOUNT_PCMASK -| sub word [DISPATCH+reg+GG_DISP2HOT], HOTCOUNT_LOOP -| jb ->vm_hotloop -|.endmacro -| -|.macro hotcall, reg -| mov reg, PC -| shr reg, 1 -| and reg, HOTCOUNT_PCMASK -| sub word [DISPATCH+reg+GG_DISP2HOT], HOTCOUNT_CALL -| jb ->vm_hotcall -|.endmacro -| -|// Set current VM state. -|.macro set_vmstate, st -| mov dword [DISPATCH+DISPATCH_GL(vmstate)], ~LJ_VMST_..st -|.endmacro -| -|// x87 compares. -|.macro fcomparepp // Compare and pop st0 >< st1. -| fucomip st1 -| fpop -|.endmacro -| -|.macro fpop1; fstp st1; .endmacro -| -|// Synthesize SSE FP constants. -|.macro sseconst_abs, reg, tmp // Synthesize abs mask. -|.if X64 -| mov64 tmp, U64x(7fffffff,ffffffff); movd reg, tmp -|.else -| pxor reg, reg; pcmpeqd reg, reg; psrlq reg, 1 -|.endif -|.endmacro -| -|.macro sseconst_hi, reg, tmp, val // Synthesize hi-32 bit const. -|.if X64 -| mov64 tmp, U64x(val,00000000); movd reg, tmp -|.else -| mov tmp, 0x .. val; movd reg, tmp; pshufd reg, reg, 0x51 -|.endif -|.endmacro -| -|.macro sseconst_sign, reg, tmp // Synthesize sign mask. -| sseconst_hi reg, tmp, 80000000 -|.endmacro -|.macro sseconst_1, reg, tmp // Synthesize 1.0. -| sseconst_hi reg, tmp, 3ff00000 -|.endmacro -|.macro sseconst_m1, reg, tmp // Synthesize -1.0. -| sseconst_hi reg, tmp, bff00000 -|.endmacro -|.macro sseconst_2p52, reg, tmp // Synthesize 2^52. -| sseconst_hi reg, tmp, 43300000 -|.endmacro -|.macro sseconst_tobit, reg, tmp // Synthesize 2^52 + 2^51. -| sseconst_hi reg, tmp, 43380000 -|.endmacro -| -|// Move table write barrier back. Overwrites reg. -|.macro barrierback, tab, reg -| and byte tab->marked, (uint8_t)~LJ_GC_BLACK // black2gray(tab) -| mov reg, [DISPATCH+DISPATCH_GL(gc.grayagain)] -| mov [DISPATCH+DISPATCH_GL(gc.grayagain)], tab -| mov tab->gclist, reg -|.endmacro -| -|//----------------------------------------------------------------------- - -/* Generate subroutines used by opcodes and other parts of the VM. */ -/* The .code_sub section should be last to help static branch prediction. */ -static void build_subroutines(BuildCtx *ctx) -{ - |.code_sub - | - |//----------------------------------------------------------------------- - |//-- Return handling ---------------------------------------------------- - |//----------------------------------------------------------------------- - | - |->vm_returnp: - | test PC, FRAME_P - | jz ->cont_dispatch - | - | // Return from pcall or xpcall fast func. - | and PC, -8 - | sub BASE, PC // Restore caller base. - | lea RAa, [RA+PC-8] // Rebase RA and prepend one result. - | mov PC, [BASE-4] // Fetch PC of previous frame. - | // Prepending may overwrite the pcall frame, so do it at the end. - | mov dword [BASE+RA+4], LJ_TTRUE // Prepend true to results. - | - |->vm_returnc: - | add RD, 1 // RD = nresults+1 - | jz ->vm_unwind_yield - | mov MULTRES, RD - | test PC, FRAME_TYPE - | jz ->BC_RET_Z // Handle regular return to Lua. - | - |->vm_return: - | // BASE = base, RA = resultofs, RD = nresults+1 (= MULTRES), PC = return - | xor PC, FRAME_C - | test PC, FRAME_TYPE - | jnz ->vm_returnp - | - | // Return to C. - | set_vmstate C - | and PC, -8 - | sub PC, BASE - | neg PC // Previous base = BASE - delta. - | - | sub RD, 1 - | jz >2 - |1: // Move results down. - |.if X64 - | mov RBa, [BASE+RA] - | mov [BASE-8], RBa - |.else - | mov RB, [BASE+RA] - | mov [BASE-8], RB - | mov RB, [BASE+RA+4] - | mov [BASE-4], RB - |.endif - | add BASE, 8 - | sub RD, 1 - | jnz <1 - |2: - | mov L:RB, SAVE_L - | mov L:RB->base, PC - |3: - | mov RD, MULTRES - | mov RA, SAVE_NRES // RA = wanted nresults+1 - |4: - | cmp RA, RD - | jne >6 // More/less results wanted? - |5: - | sub BASE, 8 - | mov L:RB->top, BASE - | - |->vm_leave_cp: - | mov RAa, SAVE_CFRAME // Restore previous C frame. - | mov L:RB->cframe, RAa - | xor eax, eax // Ok return status for vm_pcall. - | - |->vm_leave_unw: - | restoreregs - | ret - | - |6: - | jb >7 // Less results wanted? - | // More results wanted. Check stack size and fill up results with nil. - | cmp BASE, L:RB->maxstack - | ja >8 - | mov dword [BASE-4], LJ_TNIL - | add BASE, 8 - | add RD, 1 - | jmp <4 - | - |7: // Less results wanted. - | test RA, RA - | jz <5 // But check for LUA_MULTRET+1. - | sub RA, RD // Negative result! - | lea BASE, [BASE+RA*8] // Correct top. - | jmp <5 - | - |8: // Corner case: need to grow stack for filling up results. - | // This can happen if: - | // - A C function grows the stack (a lot). - | // - The GC shrinks the stack in between. - | // - A return back from a lua_call() with (high) nresults adjustment. - | mov L:RB->top, BASE // Save current top held in BASE (yes). - | mov MULTRES, RD // Need to fill only remainder with nil. - | mov FCARG2, RA - | mov FCARG1, L:RB - | call extern lj_state_growstack@8 // (lua_State *L, int n) - | mov BASE, L:RB->top // Need the (realloced) L->top in BASE. - | jmp <3 - | - |->vm_unwind_yield: - | mov al, LUA_YIELD - | jmp ->vm_unwind_c_eh - | - |->vm_unwind_c@8: // Unwind C stack, return from vm_pcall. - | // (void *cframe, int errcode) - |.if X64 - | mov eax, CARG2d // Error return status for vm_pcall. - | mov rsp, CARG1 - |.else - | mov eax, FCARG2 // Error return status for vm_pcall. - | mov esp, FCARG1 - |.if WIN - | lea FCARG1, SEH_NEXT - | fs; mov [0], FCARG1 - |.endif - |.endif - |->vm_unwind_c_eh: // Landing pad for external unwinder. - | mov L:RB, SAVE_L - | mov GL:RB, L:RB->glref - | mov dword GL:RB->vmstate, ~LJ_VMST_C - | jmp ->vm_leave_unw - | - |->vm_unwind_rethrow: - |.if X64 and not X64WIN - | mov FCARG1, SAVE_L - | mov FCARG2, eax - | restoreregs - | jmp extern lj_err_throw@8 // (lua_State *L, int errcode) - |.endif - | - |->vm_unwind_ff@4: // Unwind C stack, return from ff pcall. - | // (void *cframe) - |.if X64 - | and CARG1, CFRAME_RAWMASK - | mov rsp, CARG1 - |.else - | and FCARG1, CFRAME_RAWMASK - | mov esp, FCARG1 - |.if WIN - | lea FCARG1, SEH_NEXT - | fs; mov [0], FCARG1 - |.endif - |.endif - |->vm_unwind_ff_eh: // Landing pad for external unwinder. - | mov L:RB, SAVE_L - | mov RAa, -8 // Results start at BASE+RA = BASE-8. - | mov RD, 1+1 // Really 1+2 results, incr. later. - | mov BASE, L:RB->base - | mov DISPATCH, L:RB->glref // Setup pointer to dispatch table. - | add DISPATCH, GG_G2DISP - | mov PC, [BASE-4] // Fetch PC of previous frame. - | mov dword [BASE-4], LJ_TFALSE // Prepend false to error message. - | set_vmstate INTERP - | jmp ->vm_returnc // Increments RD/MULTRES and returns. - | - |.if WIN and not X64 - |->vm_rtlunwind@16: // Thin layer around RtlUnwind. - | // (void *cframe, void *excptrec, void *unwinder, int errcode) - | mov [esp], FCARG1 // Return value for RtlUnwind. - | push FCARG2 // Exception record for RtlUnwind. - | push 0 // Ignored by RtlUnwind. - | push dword [FCARG1+CFRAME_OFS_SEH] - | call extern RtlUnwind@16 // Violates ABI (clobbers too much). - | mov FCARG1, eax - | mov FCARG2, [esp+4] // errcode (for vm_unwind_c). - | ret // Jump to unwinder. - |.endif - | - |//----------------------------------------------------------------------- - |//-- Grow stack for calls ----------------------------------------------- - |//----------------------------------------------------------------------- - | - |->vm_growstack_c: // Grow stack for C function. - | mov FCARG2, LUA_MINSTACK - | jmp >2 - | - |->vm_growstack_v: // Grow stack for vararg Lua function. - | sub RD, 8 - | jmp >1 - | - |->vm_growstack_f: // Grow stack for fixarg Lua function. - | // BASE = new base, RD = nargs+1, RB = L, PC = first PC - | lea RD, [BASE+NARGS:RD*8-8] - |1: - | movzx RA, byte [PC-4+PC2PROTO(framesize)] - | add PC, 4 // Must point after first instruction. - | mov L:RB->base, BASE - | mov L:RB->top, RD - | mov SAVE_PC, PC - | mov FCARG2, RA - |2: - | // RB = L, L->base = new base, L->top = top - | mov FCARG1, L:RB - | call extern lj_state_growstack@8 // (lua_State *L, int n) - | mov BASE, L:RB->base - | mov RD, L:RB->top - | mov LFUNC:RB, [BASE-8] - | sub RD, BASE - | shr RD, 3 - | add NARGS:RD, 1 - | // BASE = new base, RB = LFUNC, RD = nargs+1 - | ins_callt // Just retry the call. - | - |//----------------------------------------------------------------------- - |//-- Entry points into the assembler VM --------------------------------- - |//----------------------------------------------------------------------- - | - |->vm_resume: // Setup C frame and resume thread. - | // (lua_State *L, TValue *base, int nres1 = 0, ptrdiff_t ef = 0) - | saveregs - |.if X64 - | mov L:RB, CARG1d // Caveat: CARG1d may be RA. - | mov SAVE_L, CARG1d - | mov RA, CARG2d - |.else - | mov L:RB, SAVE_L - | mov RA, INARG_BASE // Caveat: overlaps SAVE_CFRAME! - |.endif - | mov PC, FRAME_CP - | xor RD, RD - | lea KBASEa, [esp+CFRAME_RESUME] - | mov DISPATCH, L:RB->glref // Setup pointer to dispatch table. - | add DISPATCH, GG_G2DISP - | mov SAVE_PC, RD // Any value outside of bytecode is ok. - | mov SAVE_CFRAME, RDa - |.if X64 - | mov SAVE_NRES, RD - | mov SAVE_ERRF, RD - |.endif - | mov L:RB->cframe, KBASEa - | cmp byte L:RB->status, RDL - | je >2 // Initial resume (like a call). - | - | // Resume after yield (like a return). - | mov [DISPATCH+DISPATCH_GL(cur_L)], L:RB - | set_vmstate INTERP - | mov byte L:RB->status, RDL - | mov BASE, L:RB->base - | mov RD, L:RB->top - | sub RD, RA - | shr RD, 3 - | add RD, 1 // RD = nresults+1 - | sub RA, BASE // RA = resultofs - | mov PC, [BASE-4] - | mov MULTRES, RD - | test PC, FRAME_TYPE - | jz ->BC_RET_Z - | jmp ->vm_return - | - |->vm_pcall: // Setup protected C frame and enter VM. - | // (lua_State *L, TValue *base, int nres1, ptrdiff_t ef) - | saveregs - | mov PC, FRAME_CP - |.if X64 - | mov SAVE_ERRF, CARG4d - |.endif - | jmp >1 - | - |->vm_call: // Setup C frame and enter VM. - | // (lua_State *L, TValue *base, int nres1) - | saveregs - | mov PC, FRAME_C - | - |1: // Entry point for vm_pcall above (PC = ftype). - |.if X64 - | mov SAVE_NRES, CARG3d - | mov L:RB, CARG1d // Caveat: CARG1d may be RA. - | mov SAVE_L, CARG1d - | mov RA, CARG2d - |.else - | mov L:RB, SAVE_L - | mov RA, INARG_BASE // Caveat: overlaps SAVE_CFRAME! - |.endif - | - | mov DISPATCH, L:RB->glref // Setup pointer to dispatch table. - | mov KBASEa, L:RB->cframe // Add our C frame to cframe chain. - | mov SAVE_CFRAME, KBASEa - | mov SAVE_PC, L:RB // Any value outside of bytecode is ok. - | add DISPATCH, GG_G2DISP - |.if X64 - | mov L:RB->cframe, rsp - |.else - | mov L:RB->cframe, esp - |.endif - | - |2: // Entry point for vm_resume/vm_cpcall (RA = base, RB = L, PC = ftype). - | mov [DISPATCH+DISPATCH_GL(cur_L)], L:RB - | set_vmstate INTERP - | mov BASE, L:RB->base // BASE = old base (used in vmeta_call). - | add PC, RA - | sub PC, BASE // PC = frame delta + frame type - | - | mov RD, L:RB->top - | sub RD, RA - | shr NARGS:RD, 3 - | add NARGS:RD, 1 // RD = nargs+1 - | - |->vm_call_dispatch: - | mov LFUNC:RB, [RA-8] - | cmp dword [RA-4], LJ_TFUNC - | jne ->vmeta_call // Ensure KBASE defined and != BASE. - | - |->vm_call_dispatch_f: - | mov BASE, RA - | ins_call - | // BASE = new base, RB = func, RD = nargs+1, PC = caller PC - | - |->vm_cpcall: // Setup protected C frame, call C. - | // (lua_State *L, lua_CFunction func, void *ud, lua_CPFunction cp) - | saveregs - |.if X64 - | mov L:RB, CARG1d // Caveat: CARG1d may be RA. - | mov SAVE_L, CARG1d - |.else - | mov L:RB, SAVE_L - | // Caveat: INARG_CP_* and SAVE_CFRAME/SAVE_NRES/SAVE_ERRF overlap! - | mov RC, INARG_CP_UD // Get args before they are overwritten. - | mov RA, INARG_CP_FUNC - | mov BASE, INARG_CP_CALL - |.endif - | mov SAVE_PC, L:RB // Any value outside of bytecode is ok. - | - | mov KBASE, L:RB->stack // Compute -savestack(L, L->top). - | sub KBASE, L:RB->top - | mov DISPATCH, L:RB->glref // Setup pointer to dispatch table. - | mov SAVE_ERRF, 0 // No error function. - | mov SAVE_NRES, KBASE // Neg. delta means cframe w/o frame. - | add DISPATCH, GG_G2DISP - | // Handler may change cframe_nres(L->cframe) or cframe_errfunc(L->cframe). - | - |.if X64 - | mov KBASEa, L:RB->cframe // Add our C frame to cframe chain. - | mov SAVE_CFRAME, KBASEa - | mov L:RB->cframe, rsp - | mov [DISPATCH+DISPATCH_GL(cur_L)], L:RB - | - | call CARG4 // (lua_State *L, lua_CFunction func, void *ud) - |.else - | mov ARG3, RC // Have to copy args downwards. - | mov ARG2, RA - | mov ARG1, L:RB - | - | mov KBASE, L:RB->cframe // Add our C frame to cframe chain. - | mov SAVE_CFRAME, KBASE - | mov L:RB->cframe, esp - | mov [DISPATCH+DISPATCH_GL(cur_L)], L:RB - | - | call BASE // (lua_State *L, lua_CFunction func, void *ud) - |.endif - | // TValue * (new base) or NULL returned in eax (RC). - | test RC, RC - | jz ->vm_leave_cp // No base? Just remove C frame. - | mov RA, RC - | mov PC, FRAME_CP - | jmp <2 // Else continue with the call. - | - |//----------------------------------------------------------------------- - |//-- Metamethod handling ------------------------------------------------ - |//----------------------------------------------------------------------- - | - |//-- Continuation dispatch ---------------------------------------------- - | - |->cont_dispatch: - | // BASE = meta base, RA = resultofs, RD = nresults+1 (also in MULTRES) - | add RA, BASE - | and PC, -8 - | mov RB, BASE - | sub BASE, PC // Restore caller BASE. - | mov dword [RA+RD*8-4], LJ_TNIL // Ensure one valid arg. - | mov RC, RA // ... in [RC] - | mov PC, [RB-12] // Restore PC from [cont|PC]. - |.if X64 - | movsxd RAa, dword [RB-16] // May be negative on WIN64 with debug. - |.if FFI - | cmp RA, 1 - | jbe >1 - |.endif - | lea KBASEa, qword [=>0] - | add RAa, KBASEa - |.else - | mov RA, dword [RB-16] - |.if FFI - | cmp RA, 1 - | jbe >1 - |.endif - |.endif - | mov LFUNC:KBASE, [BASE-8] - | mov KBASE, LFUNC:KBASE->pc - | mov KBASE, [KBASE+PC2PROTO(k)] - | // BASE = base, RC = result, RB = meta base - | jmp RAa // Jump to continuation. - | - |.if FFI - |1: - | je ->cont_ffi_callback // cont = 1: return from FFI callback. - | // cont = 0: Tail call from C function. - | sub RB, BASE - | shr RB, 3 - | lea RD, [RB-1] - | jmp ->vm_call_tail - |.endif - | - |->cont_cat: // BASE = base, RC = result, RB = mbase - | movzx RA, PC_RB - | sub RB, 16 - | lea RA, [BASE+RA*8] - | sub RA, RB - | je ->cont_ra - | neg RA - | shr RA, 3 - |.if X64WIN - | mov CARG3d, RA - | mov L:CARG1d, SAVE_L - | mov L:CARG1d->base, BASE - | mov RCa, [RC] - | mov [RB], RCa - | mov CARG2d, RB - |.elif X64 - | mov L:CARG1d, SAVE_L - | mov L:CARG1d->base, BASE - | mov CARG3d, RA - | mov RAa, [RC] - | mov [RB], RAa - | mov CARG2d, RB - |.else - | mov ARG3, RA - | mov RA, [RC+4] - | mov RC, [RC] - | mov [RB+4], RA - | mov [RB], RC - | mov ARG2, RB - |.endif - | jmp ->BC_CAT_Z - | - |//-- Table indexing metamethods ----------------------------------------- - | - |->vmeta_tgets: - | mov TMP1, RC // RC = GCstr * - | mov TMP2, LJ_TSTR - | lea RCa, TMP1 // Store temp. TValue in TMP1/TMP2. - | cmp PC_OP, BC_GGET - | jne >1 - | lea RA, [DISPATCH+DISPATCH_GL(tmptv)] // Store fn->l.env in g->tmptv. - | mov [RA], TAB:RB // RB = GCtab * - | mov dword [RA+4], LJ_TTAB - | mov RB, RA - | jmp >2 - | - |->vmeta_tgetb: - | movzx RC, PC_RC - |.if DUALNUM - | mov TMP2, LJ_TISNUM - | mov TMP1, RC - |.else - | cvtsi2sd xmm0, RC - | movsd TMPQ, xmm0 - |.endif - | lea RCa, TMPQ // Store temp. TValue in TMPQ. - | jmp >1 - | - |->vmeta_tgetv: - | movzx RC, PC_RC // Reload TValue *k from RC. - | lea RC, [BASE+RC*8] - |1: - | movzx RB, PC_RB // Reload TValue *t from RB. - | lea RB, [BASE+RB*8] - |2: - |.if X64 - | mov L:CARG1d, SAVE_L - | mov L:CARG1d->base, BASE // Caveat: CARG2d/CARG3d may be BASE. - | mov CARG2d, RB - | mov CARG3, RCa // May be 64 bit ptr to stack. - | mov L:RB, L:CARG1d - |.else - | mov ARG2, RB - | mov L:RB, SAVE_L - | mov ARG3, RC - | mov ARG1, L:RB - | mov L:RB->base, BASE - |.endif - | mov SAVE_PC, PC - | call extern lj_meta_tget // (lua_State *L, TValue *o, TValue *k) - | // TValue * (finished) or NULL (metamethod) returned in eax (RC). - | mov BASE, L:RB->base - | test RC, RC - | jz >3 - |->cont_ra: // BASE = base, RC = result - | movzx RA, PC_RA - |.if X64 - | mov RBa, [RC] - | mov [BASE+RA*8], RBa - |.else - | mov RB, [RC+4] - | mov RC, [RC] - | mov [BASE+RA*8+4], RB - | mov [BASE+RA*8], RC - |.endif - | ins_next - | - |3: // Call __index metamethod. - | // BASE = base, L->top = new base, stack = cont/func/t/k - | mov RA, L:RB->top - | mov [RA-12], PC // [cont|PC] - | lea PC, [RA+FRAME_CONT] - | sub PC, BASE - | mov LFUNC:RB, [RA-8] // Guaranteed to be a function here. - | mov NARGS:RD, 2+1 // 2 args for func(t, k). - | jmp ->vm_call_dispatch_f - | - |->vmeta_tgetr: - | mov FCARG1, TAB:RB - | mov RB, BASE // Save BASE. - | mov FCARG2, RC // Caveat: FCARG2 == BASE - | call extern lj_tab_getinth@8 // (GCtab *t, int32_t key) - | // cTValue * or NULL returned in eax (RC). - | movzx RA, PC_RA - | mov BASE, RB // Restore BASE. - | test RC, RC - | jnz ->BC_TGETR_Z - | mov dword [BASE+RA*8+4], LJ_TNIL - | jmp ->BC_TGETR2_Z - | - |//----------------------------------------------------------------------- - | - |->vmeta_tsets: - | mov TMP1, RC // RC = GCstr * - | mov TMP2, LJ_TSTR - | lea RCa, TMP1 // Store temp. TValue in TMP1/TMP2. - | cmp PC_OP, BC_GSET - | jne >1 - | lea RA, [DISPATCH+DISPATCH_GL(tmptv)] // Store fn->l.env in g->tmptv. - | mov [RA], TAB:RB // RB = GCtab * - | mov dword [RA+4], LJ_TTAB - | mov RB, RA - | jmp >2 - | - |->vmeta_tsetb: - | movzx RC, PC_RC - |.if DUALNUM - | mov TMP2, LJ_TISNUM - | mov TMP1, RC - |.else - | cvtsi2sd xmm0, RC - | movsd TMPQ, xmm0 - |.endif - | lea RCa, TMPQ // Store temp. TValue in TMPQ. - | jmp >1 - | - |->vmeta_tsetv: - | movzx RC, PC_RC // Reload TValue *k from RC. - | lea RC, [BASE+RC*8] - |1: - | movzx RB, PC_RB // Reload TValue *t from RB. - | lea RB, [BASE+RB*8] - |2: - |.if X64 - | mov L:CARG1d, SAVE_L - | mov L:CARG1d->base, BASE // Caveat: CARG2d/CARG3d may be BASE. - | mov CARG2d, RB - | mov CARG3, RCa // May be 64 bit ptr to stack. - | mov L:RB, L:CARG1d - |.else - | mov ARG2, RB - | mov L:RB, SAVE_L - | mov ARG3, RC - | mov ARG1, L:RB - | mov L:RB->base, BASE - |.endif - | mov SAVE_PC, PC - | call extern lj_meta_tset // (lua_State *L, TValue *o, TValue *k) - | // TValue * (finished) or NULL (metamethod) returned in eax (RC). - | mov BASE, L:RB->base - | test RC, RC - | jz >3 - | // NOBARRIER: lj_meta_tset ensures the table is not black. - | movzx RA, PC_RA - |.if X64 - | mov RBa, [BASE+RA*8] - | mov [RC], RBa - |.else - | mov RB, [BASE+RA*8+4] - | mov RA, [BASE+RA*8] - | mov [RC+4], RB - | mov [RC], RA - |.endif - |->cont_nop: // BASE = base, (RC = result) - | ins_next - | - |3: // Call __newindex metamethod. - | // BASE = base, L->top = new base, stack = cont/func/t/k/(v) - | mov RA, L:RB->top - | mov [RA-12], PC // [cont|PC] - | movzx RC, PC_RA - | // Copy value to third argument. - |.if X64 - | mov RBa, [BASE+RC*8] - | mov [RA+16], RBa - |.else - | mov RB, [BASE+RC*8+4] - | mov RC, [BASE+RC*8] - | mov [RA+20], RB - | mov [RA+16], RC - |.endif - | lea PC, [RA+FRAME_CONT] - | sub PC, BASE - | mov LFUNC:RB, [RA-8] // Guaranteed to be a function here. - | mov NARGS:RD, 3+1 // 3 args for func(t, k, v). - | jmp ->vm_call_dispatch_f - | - |->vmeta_tsetr: - |.if X64WIN - | mov L:CARG1d, SAVE_L - | mov CARG3d, RC - | mov L:CARG1d->base, BASE - | xchg CARG2d, TAB:RB // Caveat: CARG2d == BASE. - |.elif X64 - | mov L:CARG1d, SAVE_L - | mov CARG2d, TAB:RB - | mov L:CARG1d->base, BASE - | mov RB, BASE // Save BASE. - | mov CARG3d, RC // Caveat: CARG3d == BASE. - |.else - | mov L:RA, SAVE_L - | mov ARG2, TAB:RB - | mov RB, BASE // Save BASE. - | mov ARG3, RC - | mov ARG1, L:RA - | mov L:RA->base, BASE - |.endif - | mov SAVE_PC, PC - | call extern lj_tab_setinth // (lua_State *L, GCtab *t, int32_t key) - | // TValue * returned in eax (RC). - | movzx RA, PC_RA - | mov BASE, RB // Restore BASE. - | jmp ->BC_TSETR_Z - | - |//-- Comparison metamethods --------------------------------------------- - | - |->vmeta_comp: - |.if X64 - | mov L:RB, SAVE_L - | mov L:RB->base, BASE // Caveat: CARG2d/CARG3d == BASE. - |.if X64WIN - | lea CARG3d, [BASE+RD*8] - | lea CARG2d, [BASE+RA*8] - |.else - | lea CARG2d, [BASE+RA*8] - | lea CARG3d, [BASE+RD*8] - |.endif - | mov CARG1d, L:RB // Caveat: CARG1d/CARG4d == RA. - | movzx CARG4d, PC_OP - |.else - | movzx RB, PC_OP - | lea RD, [BASE+RD*8] - | lea RA, [BASE+RA*8] - | mov ARG4, RB - | mov L:RB, SAVE_L - | mov ARG3, RD - | mov ARG2, RA - | mov ARG1, L:RB - | mov L:RB->base, BASE - |.endif - | mov SAVE_PC, PC - | call extern lj_meta_comp // (lua_State *L, TValue *o1, *o2, int op) - | // 0/1 or TValue * (metamethod) returned in eax (RC). - |3: - | mov BASE, L:RB->base - | cmp RC, 1 - | ja ->vmeta_binop - |4: - | lea PC, [PC+4] - | jb >6 - |5: - | movzx RD, PC_RD - | branchPC RD - |6: - | ins_next - | - |->cont_condt: // BASE = base, RC = result - | add PC, 4 - | cmp dword [RC+4], LJ_TISTRUECOND // Branch if result is true. - | jb <5 - | jmp <6 - | - |->cont_condf: // BASE = base, RC = result - | cmp dword [RC+4], LJ_TISTRUECOND // Branch if result is false. - | jmp <4 - | - |->vmeta_equal: - | sub PC, 4 - |.if X64WIN - | mov CARG3d, RD - | mov CARG4d, RB - | mov L:RB, SAVE_L - | mov L:RB->base, BASE // Caveat: CARG2d == BASE. - | mov CARG2d, RA - | mov CARG1d, L:RB // Caveat: CARG1d == RA. - |.elif X64 - | mov CARG2d, RA - | mov CARG4d, RB // Caveat: CARG4d == RA. - | mov L:RB, SAVE_L - | mov L:RB->base, BASE // Caveat: CARG3d == BASE. - | mov CARG3d, RD - | mov CARG1d, L:RB - |.else - | mov ARG4, RB - | mov L:RB, SAVE_L - | mov ARG3, RD - | mov ARG2, RA - | mov ARG1, L:RB - | mov L:RB->base, BASE - |.endif - | mov SAVE_PC, PC - | call extern lj_meta_equal // (lua_State *L, GCobj *o1, *o2, int ne) - | // 0/1 or TValue * (metamethod) returned in eax (RC). - | jmp <3 - | - |->vmeta_equal_cd: - |.if FFI - | sub PC, 4 - | mov L:RB, SAVE_L - | mov L:RB->base, BASE - | mov FCARG1, L:RB - | mov FCARG2, dword [PC-4] - | mov SAVE_PC, PC - | call extern lj_meta_equal_cd@8 // (lua_State *L, BCIns ins) - | // 0/1 or TValue * (metamethod) returned in eax (RC). - | jmp <3 - |.endif - | - |->vmeta_istype: - |.if X64 - | mov L:RB, SAVE_L - | mov L:RB->base, BASE // Caveat: CARG2d/CARG3d may be BASE. - | mov CARG2d, RA - | movzx CARG3d, PC_RD - | mov L:CARG1d, L:RB - |.else - | movzx RD, PC_RD - | mov ARG2, RA - | mov L:RB, SAVE_L - | mov ARG3, RD - | mov ARG1, L:RB - | mov L:RB->base, BASE - |.endif - | mov SAVE_PC, PC - | call extern lj_meta_istype // (lua_State *L, BCReg ra, BCReg tp) - | mov BASE, L:RB->base - | jmp <6 - | - |//-- Arithmetic metamethods --------------------------------------------- - | - |->vmeta_arith_vno: - |.if DUALNUM - | movzx RB, PC_RB - |.endif - |->vmeta_arith_vn: - | lea RC, [KBASE+RC*8] - | jmp >1 - | - |->vmeta_arith_nvo: - |.if DUALNUM - | movzx RC, PC_RC - |.endif - |->vmeta_arith_nv: - | lea RC, [KBASE+RC*8] - | lea RB, [BASE+RB*8] - | xchg RB, RC - | jmp >2 - | - |->vmeta_unm: - | lea RC, [BASE+RD*8] - | mov RB, RC - | jmp >2 - | - |->vmeta_arith_vvo: - |.if DUALNUM - | movzx RB, PC_RB - |.endif - |->vmeta_arith_vv: - | lea RC, [BASE+RC*8] - |1: - | lea RB, [BASE+RB*8] - |2: - | lea RA, [BASE+RA*8] - |.if X64WIN - | mov CARG3d, RB - | mov CARG4d, RC - | movzx RC, PC_OP - | mov ARG5d, RC - | mov L:RB, SAVE_L - | mov L:RB->base, BASE // Caveat: CARG2d == BASE. - | mov CARG2d, RA - | mov CARG1d, L:RB // Caveat: CARG1d == RA. - |.elif X64 - | movzx CARG5d, PC_OP - | mov CARG2d, RA - | mov CARG4d, RC // Caveat: CARG4d == RA. - | mov L:CARG1d, SAVE_L - | mov L:CARG1d->base, BASE // Caveat: CARG3d == BASE. - | mov CARG3d, RB - | mov L:RB, L:CARG1d - |.else - | mov ARG3, RB - | mov L:RB, SAVE_L - | mov ARG4, RC - | movzx RC, PC_OP - | mov ARG2, RA - | mov ARG5, RC - | mov ARG1, L:RB - | mov L:RB->base, BASE - |.endif - | mov SAVE_PC, PC - | call extern lj_meta_arith // (lua_State *L, TValue *ra,*rb,*rc, BCReg op) - | // NULL (finished) or TValue * (metamethod) returned in eax (RC). - | mov BASE, L:RB->base - | test RC, RC - | jz ->cont_nop - | - | // Call metamethod for binary op. - |->vmeta_binop: - | // BASE = base, RC = new base, stack = cont/func/o1/o2 - | mov RA, RC - | sub RC, BASE - | mov [RA-12], PC // [cont|PC] - | lea PC, [RC+FRAME_CONT] - | mov NARGS:RD, 2+1 // 2 args for func(o1, o2). - | jmp ->vm_call_dispatch - | - |->vmeta_len: - | mov L:RB, SAVE_L - | mov L:RB->base, BASE - | lea FCARG2, [BASE+RD*8] // Caveat: FCARG2 == BASE - | mov L:FCARG1, L:RB - | mov SAVE_PC, PC - | call extern lj_meta_len@8 // (lua_State *L, TValue *o) - | // NULL (retry) or TValue * (metamethod) returned in eax (RC). - | mov BASE, L:RB->base -#if LJ_52 - | test RC, RC - | jne ->vmeta_binop // Binop call for compatibility. - | movzx RD, PC_RD - | mov TAB:FCARG1, [BASE+RD*8] - | jmp ->BC_LEN_Z -#else - | jmp ->vmeta_binop // Binop call for compatibility. -#endif - | - |//-- Call metamethod ---------------------------------------------------- - | - |->vmeta_call_ra: - | lea RA, [BASE+RA*8+8] - |->vmeta_call: // Resolve and call __call metamethod. - | // BASE = old base, RA = new base, RC = nargs+1, PC = return - | mov TMP2, RA // Save RA, RC for us. - | mov TMP1, NARGS:RD - | sub RA, 8 - |.if X64 - | mov L:RB, SAVE_L - | mov L:RB->base, BASE // Caveat: CARG2d/CARG3d may be BASE. - | mov CARG2d, RA - | lea CARG3d, [RA+NARGS:RD*8] - | mov CARG1d, L:RB // Caveat: CARG1d may be RA. - |.else - | lea RC, [RA+NARGS:RD*8] - | mov L:RB, SAVE_L - | mov ARG2, RA - | mov ARG3, RC - | mov ARG1, L:RB - | mov L:RB->base, BASE // This is the callers base! - |.endif - | mov SAVE_PC, PC - | call extern lj_meta_call // (lua_State *L, TValue *func, TValue *top) - | mov BASE, L:RB->base - | mov RA, TMP2 - | mov NARGS:RD, TMP1 - | mov LFUNC:RB, [RA-8] - | add NARGS:RD, 1 - | // This is fragile. L->base must not move, KBASE must always be defined. - | cmp KBASE, BASE // Continue with CALLT if flag set. - | je ->BC_CALLT_Z - | mov BASE, RA - | ins_call // Otherwise call resolved metamethod. - | - |//-- Argument coercion for 'for' statement ------------------------------ - | - |->vmeta_for: - | mov L:RB, SAVE_L - | mov L:RB->base, BASE - | mov FCARG2, RA // Caveat: FCARG2 == BASE - | mov L:FCARG1, L:RB // Caveat: FCARG1 == RA - | mov SAVE_PC, PC - | call extern lj_meta_for@8 // (lua_State *L, TValue *base) - | mov BASE, L:RB->base - | mov RC, [PC-4] - | movzx RA, RCH - | movzx OP, RCL - | shr RC, 16 - |.if X64 - | jmp aword [DISPATCH+OP*8+GG_DISP2STATIC] // Retry FORI or JFORI. - |.else - | jmp aword [DISPATCH+OP*4+GG_DISP2STATIC] // Retry FORI or JFORI. - |.endif - | - |//----------------------------------------------------------------------- - |//-- Fast functions ----------------------------------------------------- - |//----------------------------------------------------------------------- - | - |.macro .ffunc, name - |->ff_ .. name: - |.endmacro - | - |.macro .ffunc_1, name - |->ff_ .. name: - | cmp NARGS:RD, 1+1; jb ->fff_fallback - |.endmacro - | - |.macro .ffunc_2, name - |->ff_ .. name: - | cmp NARGS:RD, 2+1; jb ->fff_fallback - |.endmacro - | - |.macro .ffunc_nsse, name, op - | .ffunc_1 name - | cmp dword [BASE+4], LJ_TISNUM; jae ->fff_fallback - | op xmm0, qword [BASE] - |.endmacro - | - |.macro .ffunc_nsse, name - | .ffunc_nsse name, movsd - |.endmacro - | - |.macro .ffunc_nnsse, name - | .ffunc_2 name - | cmp dword [BASE+4], LJ_TISNUM; jae ->fff_fallback - | cmp dword [BASE+12], LJ_TISNUM; jae ->fff_fallback - | movsd xmm0, qword [BASE] - | movsd xmm1, qword [BASE+8] - |.endmacro - | - |.macro .ffunc_nnr, name - | .ffunc_2 name - | cmp dword [BASE+4], LJ_TISNUM; jae ->fff_fallback - | cmp dword [BASE+12], LJ_TISNUM; jae ->fff_fallback - | fld qword [BASE+8] - | fld qword [BASE] - |.endmacro - | - |// Inlined GC threshold check. Caveat: uses label 1. - |.macro ffgccheck - | mov RB, [DISPATCH+DISPATCH_GL(gc.total)] - | cmp RB, [DISPATCH+DISPATCH_GL(gc.threshold)] - | jb >1 - | call ->fff_gcstep - |1: - |.endmacro - | - |//-- Base library: checks ----------------------------------------------- - | - |.ffunc_1 assert - | mov RB, [BASE+4] - | cmp RB, LJ_TISTRUECOND; jae ->fff_fallback - | mov PC, [BASE-4] - | mov MULTRES, RD - | mov [BASE-4], RB - | mov RB, [BASE] - | mov [BASE-8], RB - | sub RD, 2 - | jz >2 - | mov RA, BASE - |1: - | add RA, 8 - |.if X64 - | mov RBa, [RA] - | mov [RA-8], RBa - |.else - | mov RB, [RA+4] - | mov [RA-4], RB - | mov RB, [RA] - | mov [RA-8], RB - |.endif - | sub RD, 1 - | jnz <1 - |2: - | mov RD, MULTRES - | jmp ->fff_res_ - | - |.ffunc_1 type - | mov RB, [BASE+4] - |.if X64 - | mov RA, RB - | sar RA, 15 - | cmp RA, -2 - | je >3 - |.endif - | mov RC, ~LJ_TNUMX - | not RB - | cmp RC, RB - | cmova RC, RB - |2: - | mov CFUNC:RB, [BASE-8] - | mov STR:RC, [CFUNC:RB+RC*8+((char *)(&((GCfuncC *)0)->upvalue))] - | mov PC, [BASE-4] - | mov dword [BASE-4], LJ_TSTR - | mov [BASE-8], STR:RC - | jmp ->fff_res1 - |.if X64 - |3: - | mov RC, ~LJ_TLIGHTUD - | jmp <2 - |.endif - | - |//-- Base library: getters and setters --------------------------------- - | - |.ffunc_1 getmetatable - | mov RB, [BASE+4] - | mov PC, [BASE-4] - | cmp RB, LJ_TTAB; jne >6 - |1: // Field metatable must be at same offset for GCtab and GCudata! - | mov TAB:RB, [BASE] - | mov TAB:RB, TAB:RB->metatable - |2: - | test TAB:RB, TAB:RB - | mov dword [BASE-4], LJ_TNIL - | jz ->fff_res1 - | mov STR:RC, [DISPATCH+DISPATCH_GL(gcroot)+4*(GCROOT_MMNAME+MM_metatable)] - | mov dword [BASE-4], LJ_TTAB // Store metatable as default result. - | mov [BASE-8], TAB:RB - | mov RA, TAB:RB->hmask - | and RA, STR:RC->hash - | imul RA, #NODE - | add NODE:RA, TAB:RB->node - |3: // Rearranged logic, because we expect _not_ to find the key. - | cmp dword NODE:RA->key.it, LJ_TSTR - | jne >4 - | cmp dword NODE:RA->key.gcr, STR:RC - | je >5 - |4: - | mov NODE:RA, NODE:RA->next - | test NODE:RA, NODE:RA - | jnz <3 - | jmp ->fff_res1 // Not found, keep default result. - |5: - | mov RB, [RA+4] - | cmp RB, LJ_TNIL; je ->fff_res1 // Ditto for nil value. - | mov RC, [RA] - | mov [BASE-4], RB // Return value of mt.__metatable. - | mov [BASE-8], RC - | jmp ->fff_res1 - | - |6: - | cmp RB, LJ_TUDATA; je <1 - |.if X64 - | cmp RB, LJ_TNUMX; ja >8 - | cmp RB, LJ_TISNUM; jbe >7 - | mov RB, LJ_TLIGHTUD - | jmp >8 - |7: - |.else - | cmp RB, LJ_TISNUM; ja >8 - |.endif - | mov RB, LJ_TNUMX - |8: - | not RB - | mov TAB:RB, [DISPATCH+RB*4+DISPATCH_GL(gcroot[GCROOT_BASEMT])] - | jmp <2 - | - |.ffunc_2 setmetatable - | cmp dword [BASE+4], LJ_TTAB; jne ->fff_fallback - | // Fast path: no mt for table yet and not clearing the mt. - | mov TAB:RB, [BASE] - | cmp dword TAB:RB->metatable, 0; jne ->fff_fallback - | cmp dword [BASE+12], LJ_TTAB; jne ->fff_fallback - | mov TAB:RC, [BASE+8] - | mov TAB:RB->metatable, TAB:RC - | mov PC, [BASE-4] - | mov dword [BASE-4], LJ_TTAB // Return original table. - | mov [BASE-8], TAB:RB - | test byte TAB:RB->marked, LJ_GC_BLACK // isblack(table) - | jz >1 - | // Possible write barrier. Table is black, but skip iswhite(mt) check. - | barrierback TAB:RB, RC - |1: - | jmp ->fff_res1 - | - |.ffunc_2 rawget - | cmp dword [BASE+4], LJ_TTAB; jne ->fff_fallback - |.if X64WIN - | mov RB, BASE // Save BASE. - | lea CARG3d, [BASE+8] - | mov CARG2d, [BASE] // Caveat: CARG2d == BASE. - | mov CARG1d, SAVE_L - |.elif X64 - | mov RB, BASE // Save BASE. - | mov CARG2d, [BASE] - | lea CARG3d, [BASE+8] // Caveat: CARG3d == BASE. - | mov CARG1d, SAVE_L - |.else - | mov TAB:RD, [BASE] - | mov L:RB, SAVE_L - | mov ARG2, TAB:RD - | mov ARG1, L:RB - | mov RB, BASE // Save BASE. - | add BASE, 8 - | mov ARG3, BASE - |.endif - | call extern lj_tab_get // (lua_State *L, GCtab *t, cTValue *key) - | // cTValue * returned in eax (RD). - | mov BASE, RB // Restore BASE. - | // Copy table slot. - |.if X64 - | mov RBa, [RD] - | mov PC, [BASE-4] - | mov [BASE-8], RBa - |.else - | mov RB, [RD] - | mov RD, [RD+4] - | mov PC, [BASE-4] - | mov [BASE-8], RB - | mov [BASE-4], RD - |.endif - | jmp ->fff_res1 - | - |//-- Base library: conversions ------------------------------------------ - | - |.ffunc tonumber - | // Only handles the number case inline (without a base argument). - | cmp NARGS:RD, 1+1; jne ->fff_fallback // Exactly one argument. - | cmp dword [BASE+4], LJ_TISNUM - |.if DUALNUM - | jne >1 - | mov RB, dword [BASE]; jmp ->fff_resi - |1: - | ja ->fff_fallback - |.else - | jae ->fff_fallback - |.endif - | movsd xmm0, qword [BASE]; jmp ->fff_resxmm0 - | - |.ffunc_1 tostring - | // Only handles the string or number case inline. - | mov PC, [BASE-4] - | cmp dword [BASE+4], LJ_TSTR; jne >3 - | // A __tostring method in the string base metatable is ignored. - | mov STR:RD, [BASE] - |2: - | mov dword [BASE-4], LJ_TSTR - | mov [BASE-8], STR:RD - | jmp ->fff_res1 - |3: // Handle numbers inline, unless a number base metatable is present. - | cmp dword [BASE+4], LJ_TISNUM; ja ->fff_fallback - | cmp dword [DISPATCH+DISPATCH_GL(gcroot[GCROOT_BASEMT_NUM])], 0 - | jne ->fff_fallback - | ffgccheck // Caveat: uses label 1. - | mov L:RB, SAVE_L - | mov L:RB->base, BASE // Add frame since C call can throw. - | mov SAVE_PC, PC // Redundant (but a defined value). - |.if X64 and not X64WIN - | mov FCARG2, BASE // Otherwise: FCARG2 == BASE - |.endif - | mov L:FCARG1, L:RB - |.if DUALNUM - | call extern lj_strfmt_number@8 // (lua_State *L, cTValue *o) - |.else - | call extern lj_strfmt_num@8 // (lua_State *L, lua_Number *np) - |.endif - | // GCstr returned in eax (RD). - | mov BASE, L:RB->base - | jmp <2 - | - |//-- Base library: iterators ------------------------------------------- - | - |.ffunc_1 next - | je >2 // Missing 2nd arg? - |1: - | cmp dword [BASE+4], LJ_TTAB; jne ->fff_fallback - | mov L:RB, SAVE_L - | mov L:RB->base, BASE // Add frame since C call can throw. - | mov L:RB->top, BASE // Dummy frame length is ok. - | mov PC, [BASE-4] - |.if X64WIN - | lea CARG3d, [BASE+8] - | mov CARG2d, [BASE] // Caveat: CARG2d == BASE. - | mov CARG1d, L:RB - |.elif X64 - | mov CARG2d, [BASE] - | lea CARG3d, [BASE+8] // Caveat: CARG3d == BASE. - | mov CARG1d, L:RB - |.else - | mov TAB:RD, [BASE] - | mov ARG2, TAB:RD - | mov ARG1, L:RB - | add BASE, 8 - | mov ARG3, BASE - |.endif - | mov SAVE_PC, PC // Needed for ITERN fallback. - | call extern lj_tab_next // (lua_State *L, GCtab *t, TValue *key) - | // Flag returned in eax (RD). - | mov BASE, L:RB->base - | test RD, RD; jz >3 // End of traversal? - | // Copy key and value to results. - |.if X64 - | mov RBa, [BASE+8] - | mov RDa, [BASE+16] - | mov [BASE-8], RBa - | mov [BASE], RDa - |.else - | mov RB, [BASE+8] - | mov RD, [BASE+12] - | mov [BASE-8], RB - | mov [BASE-4], RD - | mov RB, [BASE+16] - | mov RD, [BASE+20] - | mov [BASE], RB - | mov [BASE+4], RD - |.endif - |->fff_res2: - | mov RD, 1+2 - | jmp ->fff_res - |2: // Set missing 2nd arg to nil. - | mov dword [BASE+12], LJ_TNIL - | jmp <1 - |3: // End of traversal: return nil. - | mov dword [BASE-4], LJ_TNIL - | jmp ->fff_res1 - | - |.ffunc_1 pairs - | mov TAB:RB, [BASE] - | cmp dword [BASE+4], LJ_TTAB; jne ->fff_fallback -#if LJ_52 - | cmp dword TAB:RB->metatable, 0; jne ->fff_fallback -#endif - | mov CFUNC:RB, [BASE-8] - | mov CFUNC:RD, CFUNC:RB->upvalue[0] - | mov PC, [BASE-4] - | mov dword [BASE-4], LJ_TFUNC - | mov [BASE-8], CFUNC:RD - | mov dword [BASE+12], LJ_TNIL - | mov RD, 1+3 - | jmp ->fff_res - | - |.ffunc_2 ipairs_aux - | cmp dword [BASE+4], LJ_TTAB; jne ->fff_fallback - | cmp dword [BASE+12], LJ_TISNUM - |.if DUALNUM - | jne ->fff_fallback - |.else - | jae ->fff_fallback - |.endif - | mov PC, [BASE-4] - |.if DUALNUM - | mov RD, dword [BASE+8] - | add RD, 1 - | mov dword [BASE-4], LJ_TISNUM - | mov dword [BASE-8], RD - |.else - | movsd xmm0, qword [BASE+8] - | sseconst_1 xmm1, RBa - | addsd xmm0, xmm1 - | cvttsd2si RD, xmm0 - | movsd qword [BASE-8], xmm0 - |.endif - | mov TAB:RB, [BASE] - | cmp RD, TAB:RB->asize; jae >2 // Not in array part? - | shl RD, 3 - | add RD, TAB:RB->array - |1: - | cmp dword [RD+4], LJ_TNIL; je ->fff_res0 - | // Copy array slot. - |.if X64 - | mov RBa, [RD] - | mov [BASE], RBa - |.else - | mov RB, [RD] - | mov RD, [RD+4] - | mov [BASE], RB - | mov [BASE+4], RD - |.endif - | jmp ->fff_res2 - |2: // Check for empty hash part first. Otherwise call C function. - | cmp dword TAB:RB->hmask, 0; je ->fff_res0 - | mov FCARG1, TAB:RB - | mov RB, BASE // Save BASE. - | mov FCARG2, RD // Caveat: FCARG2 == BASE - | call extern lj_tab_getinth@8 // (GCtab *t, int32_t key) - | // cTValue * or NULL returned in eax (RD). - | mov BASE, RB - | test RD, RD - | jnz <1 - |->fff_res0: - | mov RD, 1+0 - | jmp ->fff_res - | - |.ffunc_1 ipairs - | mov TAB:RB, [BASE] - | cmp dword [BASE+4], LJ_TTAB; jne ->fff_fallback -#if LJ_52 - | cmp dword TAB:RB->metatable, 0; jne ->fff_fallback -#endif - | mov CFUNC:RB, [BASE-8] - | mov CFUNC:RD, CFUNC:RB->upvalue[0] - | mov PC, [BASE-4] - | mov dword [BASE-4], LJ_TFUNC - | mov [BASE-8], CFUNC:RD - |.if DUALNUM - | mov dword [BASE+12], LJ_TISNUM - | mov dword [BASE+8], 0 - |.else - | xorps xmm0, xmm0 - | movsd qword [BASE+8], xmm0 - |.endif - | mov RD, 1+3 - | jmp ->fff_res - | - |//-- Base library: catch errors ---------------------------------------- - | - |.ffunc_1 pcall - | lea RA, [BASE+8] - | sub NARGS:RD, 1 - | mov PC, 8+FRAME_PCALL - |1: - | movzx RB, byte [DISPATCH+DISPATCH_GL(hookmask)] - | shr RB, HOOK_ACTIVE_SHIFT - | and RB, 1 - | add PC, RB // Remember active hook before pcall. - | jmp ->vm_call_dispatch - | - |.ffunc_2 xpcall - | cmp dword [BASE+12], LJ_TFUNC; jne ->fff_fallback - | mov RB, [BASE+4] // Swap function and traceback. - | mov [BASE+12], RB - | mov dword [BASE+4], LJ_TFUNC - | mov LFUNC:RB, [BASE] - | mov PC, [BASE+8] - | mov [BASE+8], LFUNC:RB - | mov [BASE], PC - | lea RA, [BASE+16] - | sub NARGS:RD, 2 - | mov PC, 16+FRAME_PCALL - | jmp <1 - | - |//-- Coroutine library -------------------------------------------------- - | - |.macro coroutine_resume_wrap, resume - |.if resume - |.ffunc_1 coroutine_resume - | mov L:RB, [BASE] - |.else - |.ffunc coroutine_wrap_aux - | mov CFUNC:RB, [BASE-8] - | mov L:RB, CFUNC:RB->upvalue[0].gcr - |.endif - | mov PC, [BASE-4] - | mov SAVE_PC, PC - |.if X64 - | mov TMP1, L:RB - |.else - | mov ARG1, L:RB - |.endif - |.if resume - | cmp dword [BASE+4], LJ_TTHREAD; jne ->fff_fallback - |.endif - | cmp aword L:RB->cframe, 0; jne ->fff_fallback - | cmp byte L:RB->status, LUA_YIELD; ja ->fff_fallback - | mov RA, L:RB->top - | je >1 // Status != LUA_YIELD (i.e. 0)? - | cmp RA, L:RB->base // Check for presence of initial func. - | je ->fff_fallback - |1: - |.if resume - | lea PC, [RA+NARGS:RD*8-16] // Check stack space (-1-thread). - |.else - | lea PC, [RA+NARGS:RD*8-8] // Check stack space (-1). - |.endif - | cmp PC, L:RB->maxstack; ja ->fff_fallback - | mov L:RB->top, PC - | - | mov L:RB, SAVE_L - | mov L:RB->base, BASE - |.if resume - | add BASE, 8 // Keep resumed thread in stack for GC. - |.endif - | mov L:RB->top, BASE - |.if resume - | lea RB, [BASE+NARGS:RD*8-24] // RB = end of source for stack move. - |.else - | lea RB, [BASE+NARGS:RD*8-16] // RB = end of source for stack move. - |.endif - | sub RBa, PCa // Relative to PC. - | - | cmp PC, RA - | je >3 - |2: // Move args to coroutine. - |.if X64 - | mov RCa, [PC+RB] - | mov [PC-8], RCa - |.else - | mov RC, [PC+RB+4] - | mov [PC-4], RC - | mov RC, [PC+RB] - | mov [PC-8], RC - |.endif - | sub PC, 8 - | cmp PC, RA - | jne <2 - |3: - |.if X64 - | mov CARG2d, RA - | mov CARG1d, TMP1 - |.else - | mov ARG2, RA - | xor RA, RA - | mov ARG4, RA - | mov ARG3, RA - |.endif - | call ->vm_resume // (lua_State *L, TValue *base, 0, 0) - | - | mov L:RB, SAVE_L - |.if X64 - | mov L:PC, TMP1 - |.else - | mov L:PC, ARG1 // The callee doesn't modify SAVE_L. - |.endif - | mov BASE, L:RB->base - | mov [DISPATCH+DISPATCH_GL(cur_L)], L:RB - | set_vmstate INTERP - | - | cmp eax, LUA_YIELD - | ja >8 - |4: - | mov RA, L:PC->base - | mov KBASE, L:PC->top - | mov L:PC->top, RA // Clear coroutine stack. - | mov PC, KBASE - | sub PC, RA - | je >6 // No results? - | lea RD, [BASE+PC] - | shr PC, 3 - | cmp RD, L:RB->maxstack - | ja >9 // Need to grow stack? - | - | mov RB, BASE - | sub RBa, RAa - |5: // Move results from coroutine. - |.if X64 - | mov RDa, [RA] - | mov [RA+RB], RDa - |.else - | mov RD, [RA] - | mov [RA+RB], RD - | mov RD, [RA+4] - | mov [RA+RB+4], RD - |.endif - | add RA, 8 - | cmp RA, KBASE - | jne <5 - |6: - |.if resume - | lea RD, [PC+2] // nresults+1 = 1 + true + results. - | mov dword [BASE-4], LJ_TTRUE // Prepend true to results. - |.else - | lea RD, [PC+1] // nresults+1 = 1 + results. - |.endif - |7: - | mov PC, SAVE_PC - | mov MULTRES, RD - |.if resume - | mov RAa, -8 - |.else - | xor RA, RA - |.endif - | test PC, FRAME_TYPE - | jz ->BC_RET_Z - | jmp ->vm_return - | - |8: // Coroutine returned with error (at co->top-1). - |.if resume - | mov dword [BASE-4], LJ_TFALSE // Prepend false to results. - | mov RA, L:PC->top - | sub RA, 8 - | mov L:PC->top, RA // Clear error from coroutine stack. - | // Copy error message. - |.if X64 - | mov RDa, [RA] - | mov [BASE], RDa - |.else - | mov RD, [RA] - | mov [BASE], RD - | mov RD, [RA+4] - | mov [BASE+4], RD - |.endif - | mov RD, 1+2 // nresults+1 = 1 + false + error. - | jmp <7 - |.else - | mov FCARG2, L:PC - | mov FCARG1, L:RB - | call extern lj_ffh_coroutine_wrap_err@8 // (lua_State *L, lua_State *co) - | // Error function does not return. - |.endif - | - |9: // Handle stack expansion on return from yield. - |.if X64 - | mov L:RA, TMP1 - |.else - | mov L:RA, ARG1 // The callee doesn't modify SAVE_L. - |.endif - | mov L:RA->top, KBASE // Undo coroutine stack clearing. - | mov FCARG2, PC - | mov FCARG1, L:RB - | call extern lj_state_growstack@8 // (lua_State *L, int n) - |.if X64 - | mov L:PC, TMP1 - |.else - | mov L:PC, ARG1 - |.endif - | mov BASE, L:RB->base - | jmp <4 // Retry the stack move. - |.endmacro - | - | coroutine_resume_wrap 1 // coroutine.resume - | coroutine_resume_wrap 0 // coroutine.wrap - | - |.ffunc coroutine_yield - | mov L:RB, SAVE_L - | test aword L:RB->cframe, CFRAME_RESUME - | jz ->fff_fallback - | mov L:RB->base, BASE - | lea RD, [BASE+NARGS:RD*8-8] - | mov L:RB->top, RD - | xor RD, RD - | mov aword L:RB->cframe, RDa - | mov al, LUA_YIELD - | mov byte L:RB->status, al - | jmp ->vm_leave_unw - | - |//-- Math library ------------------------------------------------------- - | - |.if not DUALNUM - |->fff_resi: // Dummy. - |.endif - | - |->fff_resn: - | mov PC, [BASE-4] - | fstp qword [BASE-8] - | jmp ->fff_res1 - | - | .ffunc_1 math_abs - |.if DUALNUM - | cmp dword [BASE+4], LJ_TISNUM; jne >2 - | mov RB, dword [BASE] - | cmp RB, 0; jns ->fff_resi - | neg RB; js >1 - |->fff_resbit: - |->fff_resi: - | mov PC, [BASE-4] - | mov dword [BASE-4], LJ_TISNUM - | mov dword [BASE-8], RB - | jmp ->fff_res1 - |1: - | mov PC, [BASE-4] - | mov dword [BASE-4], 0x41e00000 // 2^31. - | mov dword [BASE-8], 0 - | jmp ->fff_res1 - |2: - | ja ->fff_fallback - |.else - | cmp dword [BASE+4], LJ_TISNUM; jae ->fff_fallback - |.endif - | movsd xmm0, qword [BASE] - | sseconst_abs xmm1, RDa - | andps xmm0, xmm1 - |->fff_resxmm0: - | mov PC, [BASE-4] - | movsd qword [BASE-8], xmm0 - | // fallthrough - | - |->fff_res1: - | mov RD, 1+1 - |->fff_res: - | mov MULTRES, RD - |->fff_res_: - | test PC, FRAME_TYPE - | jnz >7 - |5: - | cmp PC_RB, RDL // More results expected? - | ja >6 - | // Adjust BASE. KBASE is assumed to be set for the calling frame. - | movzx RA, PC_RA - | not RAa // Note: ~RA = -(RA+1) - | lea BASE, [BASE+RA*8] // base = base - (RA+1)*8 - | ins_next - | - |6: // Fill up results with nil. - | mov dword [BASE+RD*8-12], LJ_TNIL - | add RD, 1 - | jmp <5 - | - |7: // Non-standard return case. - | mov RAa, -8 // Results start at BASE+RA = BASE-8. - | jmp ->vm_return - | - |.if X64 - |.define fff_resfp, fff_resxmm0 - |.else - |.define fff_resfp, fff_resn - |.endif - | - |.macro math_round, func - | .ffunc math_ .. func - |.if DUALNUM - | cmp dword [BASE+4], LJ_TISNUM; jne >1 - | mov RB, dword [BASE]; jmp ->fff_resi - |1: - | ja ->fff_fallback - |.else - | cmp dword [BASE+4], LJ_TISNUM; jae ->fff_fallback - |.endif - | movsd xmm0, qword [BASE] - | call ->vm_ .. func .. _sse - |.if DUALNUM - | cvttsd2si RB, xmm0 - | cmp RB, 0x80000000 - | jne ->fff_resi - | cvtsi2sd xmm1, RB - | ucomisd xmm0, xmm1 - | jp ->fff_resxmm0 - | je ->fff_resi - |.endif - | jmp ->fff_resxmm0 - |.endmacro - | - | math_round floor - | math_round ceil - | - |.ffunc_nsse math_sqrt, sqrtsd; jmp ->fff_resxmm0 - | - |.ffunc math_log - | cmp NARGS:RD, 1+1; jne ->fff_fallback // Exactly one argument. - | cmp dword [BASE+4], LJ_TISNUM; jae ->fff_fallback - | movsd xmm0, qword [BASE] - |.if not X64 - | movsd FPARG1, xmm0 - |.endif - | mov RB, BASE - | call extern log - | mov BASE, RB - | jmp ->fff_resfp - | - |.macro math_extern, func - | .ffunc_nsse math_ .. func - |.if not X64 - | movsd FPARG1, xmm0 - |.endif - | mov RB, BASE - | call extern func - | mov BASE, RB - | jmp ->fff_resfp - |.endmacro - | - |.macro math_extern2, func - | .ffunc_nnsse math_ .. func - |.if not X64 - | movsd FPARG1, xmm0 - | movsd FPARG3, xmm1 - |.endif - | mov RB, BASE - | call extern func - | mov BASE, RB - | jmp ->fff_resfp - |.endmacro - | - | math_extern log10 - | math_extern exp - | math_extern sin - | math_extern cos - | math_extern tan - | math_extern asin - | math_extern acos - | math_extern atan - | math_extern sinh - | math_extern cosh - | math_extern tanh - | math_extern2 pow - | math_extern2 atan2 - | math_extern2 fmod - | - |.ffunc_nnr math_ldexp; fscale; fpop1; jmp ->fff_resn - | - |.ffunc_1 math_frexp - | mov RB, [BASE+4] - | cmp RB, LJ_TISNUM; jae ->fff_fallback - | mov PC, [BASE-4] - | mov RC, [BASE] - | mov [BASE-4], RB; mov [BASE-8], RC - | shl RB, 1; cmp RB, 0xffe00000; jae >3 - | or RC, RB; jz >3 - | mov RC, 1022 - | cmp RB, 0x00200000; jb >4 - |1: - | shr RB, 21; sub RB, RC // Extract and unbias exponent. - | cvtsi2sd xmm0, RB - | mov RB, [BASE-4] - | and RB, 0x800fffff // Mask off exponent. - | or RB, 0x3fe00000 // Put mantissa in range [0.5,1) or 0. - | mov [BASE-4], RB - |2: - | movsd qword [BASE], xmm0 - | mov RD, 1+2 - | jmp ->fff_res - |3: // Return +-0, +-Inf, NaN unmodified and an exponent of 0. - | xorps xmm0, xmm0; jmp <2 - |4: // Handle denormals by multiplying with 2^54 and adjusting the bias. - | movsd xmm0, qword [BASE] - | sseconst_hi xmm1, RBa, 43500000 // 2^54. - | mulsd xmm0, xmm1 - | movsd qword [BASE-8], xmm0 - | mov RB, [BASE-4]; mov RC, 1076; shl RB, 1; jmp <1 - | - |.ffunc_nsse math_modf - | mov RB, [BASE+4] - | mov PC, [BASE-4] - | shl RB, 1; cmp RB, 0xffe00000; je >4 // +-Inf? - | movaps xmm4, xmm0 - | call ->vm_trunc_sse - | subsd xmm4, xmm0 - |1: - | movsd qword [BASE-8], xmm0 - | movsd qword [BASE], xmm4 - | mov RC, [BASE-4]; mov RB, [BASE+4] - | xor RC, RB; js >3 // Need to adjust sign? - |2: - | mov RD, 1+2 - | jmp ->fff_res - |3: - | xor RB, 0x80000000; mov [BASE+4], RB // Flip sign of fraction. - | jmp <2 - |4: - | xorps xmm4, xmm4; jmp <1 // Return +-Inf and +-0. - | - |.macro math_minmax, name, cmovop, sseop - | .ffunc name - | mov RA, 2 - | cmp dword [BASE+4], LJ_TISNUM - |.if DUALNUM - | jne >4 - | mov RB, dword [BASE] - |1: // Handle integers. - | cmp RA, RD; jae ->fff_resi - | cmp dword [BASE+RA*8-4], LJ_TISNUM; jne >3 - | cmp RB, dword [BASE+RA*8-8] - | cmovop RB, dword [BASE+RA*8-8] - | add RA, 1 - | jmp <1 - |3: - | ja ->fff_fallback - | // Convert intermediate result to number and continue below. - | cvtsi2sd xmm0, RB - | jmp >6 - |4: - | ja ->fff_fallback - |.else - | jae ->fff_fallback - |.endif - | - | movsd xmm0, qword [BASE] - |5: // Handle numbers or integers. - | cmp RA, RD; jae ->fff_resxmm0 - | cmp dword [BASE+RA*8-4], LJ_TISNUM - |.if DUALNUM - | jb >6 - | ja ->fff_fallback - | cvtsi2sd xmm1, dword [BASE+RA*8-8] - | jmp >7 - |.else - | jae ->fff_fallback - |.endif - |6: - | movsd xmm1, qword [BASE+RA*8-8] - |7: - | sseop xmm0, xmm1 - | add RA, 1 - | jmp <5 - |.endmacro - | - | math_minmax math_min, cmovg, minsd - | math_minmax math_max, cmovl, maxsd - | - |//-- String library ----------------------------------------------------- - | - |.ffunc string_byte // Only handle the 1-arg case here. - | cmp NARGS:RD, 1+1; jne ->fff_fallback - | cmp dword [BASE+4], LJ_TSTR; jne ->fff_fallback - | mov STR:RB, [BASE] - | mov PC, [BASE-4] - | cmp dword STR:RB->len, 1 - | jb ->fff_res0 // Return no results for empty string. - | movzx RB, byte STR:RB[1] - |.if DUALNUM - | jmp ->fff_resi - |.else - | cvtsi2sd xmm0, RB; jmp ->fff_resxmm0 - |.endif - | - |.ffunc string_char // Only handle the 1-arg case here. - | ffgccheck - | cmp NARGS:RD, 1+1; jne ->fff_fallback // *Exactly* 1 arg. - | cmp dword [BASE+4], LJ_TISNUM - |.if DUALNUM - | jne ->fff_fallback - | mov RB, dword [BASE] - | cmp RB, 255; ja ->fff_fallback - | mov TMP2, RB - |.else - | jae ->fff_fallback - | cvttsd2si RB, qword [BASE] - | cmp RB, 255; ja ->fff_fallback - | mov TMP2, RB - |.endif - |.if X64 - | mov TMP3, 1 - |.else - | mov ARG3, 1 - |.endif - | lea RDa, TMP2 // Points to stack. Little-endian. - |->fff_newstr: - | mov L:RB, SAVE_L - | mov L:RB->base, BASE - |.if X64 - | mov CARG3d, TMP3 // Zero-extended to size_t. - | mov CARG2, RDa // May be 64 bit ptr to stack. - | mov CARG1d, L:RB - |.else - | mov ARG2, RD - | mov ARG1, L:RB - |.endif - | mov SAVE_PC, PC - | call extern lj_str_new // (lua_State *L, char *str, size_t l) - |->fff_resstr: - | // GCstr * returned in eax (RD). - | mov BASE, L:RB->base - | mov PC, [BASE-4] - | mov dword [BASE-4], LJ_TSTR - | mov [BASE-8], STR:RD - | jmp ->fff_res1 - | - |.ffunc string_sub - | ffgccheck - | mov TMP2, -1 - | cmp NARGS:RD, 1+2; jb ->fff_fallback - | jna >1 - | cmp dword [BASE+20], LJ_TISNUM - |.if DUALNUM - | jne ->fff_fallback - | mov RB, dword [BASE+16] - | mov TMP2, RB - |.else - | jae ->fff_fallback - | cvttsd2si RB, qword [BASE+16] - | mov TMP2, RB - |.endif - |1: - | cmp dword [BASE+4], LJ_TSTR; jne ->fff_fallback - | cmp dword [BASE+12], LJ_TISNUM - |.if DUALNUM - | jne ->fff_fallback - |.else - | jae ->fff_fallback - |.endif - | mov STR:RB, [BASE] - | mov TMP3, STR:RB - | mov RB, STR:RB->len - |.if DUALNUM - | mov RA, dword [BASE+8] - |.else - | cvttsd2si RA, qword [BASE+8] - |.endif - | mov RC, TMP2 - | cmp RB, RC // len < end? (unsigned compare) - | jb >5 - |2: - | test RA, RA // start <= 0? - | jle >7 - |3: - | mov STR:RB, TMP3 - | sub RC, RA // start > end? - | jl ->fff_emptystr - | lea RB, [STR:RB+RA+#STR-1] - | add RC, 1 - |4: - |.if X64 - | mov TMP3, RC - |.else - | mov ARG3, RC - |.endif - | mov RD, RB - | jmp ->fff_newstr - | - |5: // Negative end or overflow. - | jl >6 - | lea RC, [RC+RB+1] // end = end+(len+1) - | jmp <2 - |6: // Overflow. - | mov RC, RB // end = len - | jmp <2 - | - |7: // Negative start or underflow. - | je >8 - | add RA, RB // start = start+(len+1) - | add RA, 1 - | jg <3 // start > 0? - |8: // Underflow. - | mov RA, 1 // start = 1 - | jmp <3 - | - |->fff_emptystr: // Range underflow. - | xor RC, RC // Zero length. Any ptr in RB is ok. - | jmp <4 - | - |.macro ffstring_op, name - | .ffunc_1 string_ .. name - | ffgccheck - | cmp dword [BASE+4], LJ_TSTR; jne ->fff_fallback - | mov L:RB, SAVE_L - | lea SBUF:FCARG1, [DISPATCH+DISPATCH_GL(tmpbuf)] - | mov L:RB->base, BASE - | mov STR:FCARG2, [BASE] // Caveat: FCARG2 == BASE - | mov RC, SBUF:FCARG1->b - | mov SBUF:FCARG1->L, L:RB - | mov SBUF:FCARG1->p, RC - | mov SAVE_PC, PC - | call extern lj_buf_putstr_ .. name .. @8 - | mov FCARG1, eax - | call extern lj_buf_tostr@4 - | jmp ->fff_resstr - |.endmacro - | - |ffstring_op reverse - |ffstring_op lower - |ffstring_op upper - | - |//-- Bit library -------------------------------------------------------- - | - |.macro .ffunc_bit, name, kind, fdef - | fdef name - |.if kind == 2 - | sseconst_tobit xmm1, RBa - |.endif - | cmp dword [BASE+4], LJ_TISNUM - |.if DUALNUM - | jne >1 - | mov RB, dword [BASE] - |.if kind > 0 - | jmp >2 - |.else - | jmp ->fff_resbit - |.endif - |1: - | ja ->fff_fallback - |.else - | jae ->fff_fallback - |.endif - | movsd xmm0, qword [BASE] - |.if kind < 2 - | sseconst_tobit xmm1, RBa - |.endif - | addsd xmm0, xmm1 - | movd RB, xmm0 - |2: - |.endmacro - | - |.macro .ffunc_bit, name, kind - | .ffunc_bit name, kind, .ffunc_1 - |.endmacro - | - |.ffunc_bit bit_tobit, 0 - | jmp ->fff_resbit - | - |.macro .ffunc_bit_op, name, ins - | .ffunc_bit name, 2 - | mov TMP2, NARGS:RD // Save for fallback. - | lea RD, [BASE+NARGS:RD*8-16] - |1: - | cmp RD, BASE - | jbe ->fff_resbit - | cmp dword [RD+4], LJ_TISNUM - |.if DUALNUM - | jne >2 - | ins RB, dword [RD] - | sub RD, 8 - | jmp <1 - |2: - | ja ->fff_fallback_bit_op - |.else - | jae ->fff_fallback_bit_op - |.endif - | movsd xmm0, qword [RD] - | addsd xmm0, xmm1 - | movd RA, xmm0 - | ins RB, RA - | sub RD, 8 - | jmp <1 - |.endmacro - | - |.ffunc_bit_op bit_band, and - |.ffunc_bit_op bit_bor, or - |.ffunc_bit_op bit_bxor, xor - | - |.ffunc_bit bit_bswap, 1 - | bswap RB - | jmp ->fff_resbit - | - |.ffunc_bit bit_bnot, 1 - | not RB - |.if DUALNUM - | jmp ->fff_resbit - |.else - |->fff_resbit: - | cvtsi2sd xmm0, RB - | jmp ->fff_resxmm0 - |.endif - | - |->fff_fallback_bit_op: - | mov NARGS:RD, TMP2 // Restore for fallback - | jmp ->fff_fallback - | - |.macro .ffunc_bit_sh, name, ins - |.if DUALNUM - | .ffunc_bit name, 1, .ffunc_2 - | // Note: no inline conversion from number for 2nd argument! - | cmp dword [BASE+12], LJ_TISNUM; jne ->fff_fallback - | mov RA, dword [BASE+8] - |.else - | .ffunc_nnsse name - | sseconst_tobit xmm2, RBa - | addsd xmm0, xmm2 - | addsd xmm1, xmm2 - | movd RB, xmm0 - | movd RA, xmm1 - |.endif - | ins RB, cl // Assumes RA is ecx. - | jmp ->fff_resbit - |.endmacro - | - |.ffunc_bit_sh bit_lshift, shl - |.ffunc_bit_sh bit_rshift, shr - |.ffunc_bit_sh bit_arshift, sar - |.ffunc_bit_sh bit_rol, rol - |.ffunc_bit_sh bit_ror, ror - | - |//----------------------------------------------------------------------- - | - |->fff_fallback_2: - | mov NARGS:RD, 1+2 // Other args are ignored, anyway. - | jmp ->fff_fallback - |->fff_fallback_1: - | mov NARGS:RD, 1+1 // Other args are ignored, anyway. - |->fff_fallback: // Call fast function fallback handler. - | // BASE = new base, RD = nargs+1 - | mov L:RB, SAVE_L - | mov PC, [BASE-4] // Fallback may overwrite PC. - | mov SAVE_PC, PC // Redundant (but a defined value). - | mov L:RB->base, BASE - | lea RD, [BASE+NARGS:RD*8-8] - | lea RA, [RD+8*LUA_MINSTACK] // Ensure enough space for handler. - | mov L:RB->top, RD - | mov CFUNC:RD, [BASE-8] - | cmp RA, L:RB->maxstack - | ja >5 // Need to grow stack. - |.if X64 - | mov CARG1d, L:RB - |.else - | mov ARG1, L:RB - |.endif - | call aword CFUNC:RD->f // (lua_State *L) - | mov BASE, L:RB->base - | // Either throws an error, or recovers and returns -1, 0 or nresults+1. - | test RD, RD; jg ->fff_res // Returned nresults+1? - |1: - | mov RA, L:RB->top - | sub RA, BASE - | shr RA, 3 - | test RD, RD - | lea NARGS:RD, [RA+1] - | mov LFUNC:RB, [BASE-8] - | jne ->vm_call_tail // Returned -1? - | ins_callt // Returned 0: retry fast path. - | - |// Reconstruct previous base for vmeta_call during tailcall. - |->vm_call_tail: - | mov RA, BASE - | test PC, FRAME_TYPE - | jnz >3 - | movzx RB, PC_RA - | not RBa // Note: ~RB = -(RB+1) - | lea BASE, [BASE+RB*8] // base = base - (RB+1)*8 - | jmp ->vm_call_dispatch // Resolve again for tailcall. - |3: - | mov RB, PC - | and RB, -8 - | sub BASE, RB - | jmp ->vm_call_dispatch // Resolve again for tailcall. - | - |5: // Grow stack for fallback handler. - | mov FCARG2, LUA_MINSTACK - | mov FCARG1, L:RB - | call extern lj_state_growstack@8 // (lua_State *L, int n) - | mov BASE, L:RB->base - | xor RD, RD // Simulate a return 0. - | jmp <1 // Dumb retry (goes through ff first). - | - |->fff_gcstep: // Call GC step function. - | // BASE = new base, RD = nargs+1 - | pop RBa // Must keep stack at same level. - | mov TMPa, RBa // Save return address - | mov L:RB, SAVE_L - | mov SAVE_PC, PC // Redundant (but a defined value). - | mov L:RB->base, BASE - | lea RD, [BASE+NARGS:RD*8-8] - | mov FCARG1, L:RB - | mov L:RB->top, RD - | call extern lj_gc_step@4 // (lua_State *L) - | mov BASE, L:RB->base - | mov RD, L:RB->top - | sub RD, BASE - | shr RD, 3 - | add NARGS:RD, 1 - | mov RBa, TMPa - | push RBa // Restore return address. - | ret - | - |//----------------------------------------------------------------------- - |//-- Special dispatch targets ------------------------------------------- - |//----------------------------------------------------------------------- - | - |->vm_record: // Dispatch target for recording phase. - |.if JIT - | movzx RD, byte [DISPATCH+DISPATCH_GL(hookmask)] - | test RDL, HOOK_VMEVENT // No recording while in vmevent. - | jnz >5 - | // Decrement the hookcount for consistency, but always do the call. - | test RDL, HOOK_ACTIVE - | jnz >1 - | test RDL, LUA_MASKLINE|LUA_MASKCOUNT - | jz >1 - | dec dword [DISPATCH+DISPATCH_GL(hookcount)] - | jmp >1 - |.endif - | - |->vm_rethook: // Dispatch target for return hooks. - | movzx RD, byte [DISPATCH+DISPATCH_GL(hookmask)] - | test RDL, HOOK_ACTIVE // Hook already active? - | jnz >5 - | jmp >1 - | - |->vm_inshook: // Dispatch target for instr/line hooks. - | movzx RD, byte [DISPATCH+DISPATCH_GL(hookmask)] - | test RDL, HOOK_ACTIVE // Hook already active? - | jnz >5 - | - | test RDL, LUA_MASKLINE|LUA_MASKCOUNT - | jz >5 - | dec dword [DISPATCH+DISPATCH_GL(hookcount)] - | jz >1 - | test RDL, LUA_MASKLINE - | jz >5 - |1: - | mov L:RB, SAVE_L - | mov L:RB->base, BASE - | mov FCARG2, PC // Caveat: FCARG2 == BASE - | mov FCARG1, L:RB - | // SAVE_PC must hold the _previous_ PC. The callee updates it with PC. - | call extern lj_dispatch_ins@8 // (lua_State *L, const BCIns *pc) - |3: - | mov BASE, L:RB->base - |4: - | movzx RA, PC_RA - |5: - | movzx OP, PC_OP - | movzx RD, PC_RD - |.if X64 - | jmp aword [DISPATCH+OP*8+GG_DISP2STATIC] // Re-dispatch to static ins. - |.else - | jmp aword [DISPATCH+OP*4+GG_DISP2STATIC] // Re-dispatch to static ins. - |.endif - | - |->cont_hook: // Continue from hook yield. - | add PC, 4 - | mov RA, [RB-24] - | mov MULTRES, RA // Restore MULTRES for *M ins. - | jmp <4 - | - |->vm_hotloop: // Hot loop counter underflow. - |.if JIT - | mov LFUNC:RB, [BASE-8] // Same as curr_topL(L). - | mov RB, LFUNC:RB->pc - | movzx RD, byte [RB+PC2PROTO(framesize)] - | lea RD, [BASE+RD*8] - | mov L:RB, SAVE_L - | mov L:RB->base, BASE - | mov L:RB->top, RD - | mov FCARG2, PC - | lea FCARG1, [DISPATCH+GG_DISP2J] - | mov aword [DISPATCH+DISPATCH_J(L)], L:RBa - | mov SAVE_PC, PC - | call extern lj_trace_hot@8 // (jit_State *J, const BCIns *pc) - | jmp <3 - |.endif - | - |->vm_callhook: // Dispatch target for call hooks. - | mov SAVE_PC, PC - |.if JIT - | jmp >1 - |.endif - | - |->vm_hotcall: // Hot call counter underflow. - |.if JIT - | mov SAVE_PC, PC - | or PC, 1 // Marker for hot call. - |1: - |.endif - | lea RD, [BASE+NARGS:RD*8-8] - | mov L:RB, SAVE_L - | mov L:RB->base, BASE - | mov L:RB->top, RD - | mov FCARG2, PC - | mov FCARG1, L:RB - | call extern lj_dispatch_call@8 // (lua_State *L, const BCIns *pc) - | // ASMFunction returned in eax/rax (RDa). - | mov SAVE_PC, 0 // Invalidate for subsequent line hook. - |.if JIT - | and PC, -2 - |.endif - | mov BASE, L:RB->base - | mov RAa, RDa - | mov RD, L:RB->top - | sub RD, BASE - | mov RBa, RAa - | movzx RA, PC_RA - | shr RD, 3 - | add NARGS:RD, 1 - | jmp RBa - | - |->cont_stitch: // Trace stitching. - |.if JIT - | // BASE = base, RC = result, RB = mbase - | mov TRACE:RA, [RB-24] // Save previous trace. - | mov TMP1, TRACE:RA - | mov TMP3, DISPATCH // Need one more register. - | mov DISPATCH, MULTRES - | movzx RA, PC_RA - | lea RA, [BASE+RA*8] // Call base. - | sub DISPATCH, 1 - | jz >2 - |1: // Move results down. - |.if X64 - | mov RBa, [RC] - | mov [RA], RBa - |.else - | mov RB, [RC] - | mov [RA], RB - | mov RB, [RC+4] - | mov [RA+4], RB - |.endif - | add RC, 8 - | add RA, 8 - | sub DISPATCH, 1 - | jnz <1 - |2: - | movzx RC, PC_RA - | movzx RB, PC_RB - | add RC, RB - | lea RC, [BASE+RC*8-8] - |3: - | cmp RC, RA - | ja >9 // More results wanted? - | - | mov DISPATCH, TMP3 - | mov TRACE:RD, TMP1 // Get previous trace. - | movzx RB, word TRACE:RD->traceno - | movzx RD, word TRACE:RD->link - | cmp RD, RB - | je ->cont_nop // Blacklisted. - | test RD, RD - | jne =>BC_JLOOP // Jump to stitched trace. - | - | // Stitch a new trace to the previous trace. - | mov [DISPATCH+DISPATCH_J(exitno)], RB - | mov L:RB, SAVE_L - | mov L:RB->base, BASE - | mov FCARG2, PC - | lea FCARG1, [DISPATCH+GG_DISP2J] - | mov aword [DISPATCH+DISPATCH_J(L)], L:RBa - | call extern lj_dispatch_stitch@8 // (jit_State *J, const BCIns *pc) - | mov BASE, L:RB->base - | jmp ->cont_nop - | - |9: // Fill up results with nil. - | mov dword [RA+4], LJ_TNIL - | add RA, 8 - | jmp <3 - |.endif - | - |->vm_profhook: // Dispatch target for profiler hook. -#if LJ_HASPROFILE - | mov L:RB, SAVE_L - | mov L:RB->base, BASE - | mov FCARG2, PC // Caveat: FCARG2 == BASE - | mov FCARG1, L:RB - | call extern lj_dispatch_profile@8 // (lua_State *L, const BCIns *pc) - | mov BASE, L:RB->base - | // HOOK_PROFILE is off again, so re-dispatch to dynamic instruction. - | sub PC, 4 - | jmp ->cont_nop -#endif - | - |//----------------------------------------------------------------------- - |//-- Trace exit handler ------------------------------------------------- - |//----------------------------------------------------------------------- - | - |// Called from an exit stub with the exit number on the stack. - |// The 16 bit exit number is stored with two (sign-extended) push imm8. - |->vm_exit_handler: - |.if JIT - |.if X64 - | push r13; push r12 - | push r11; push r10; push r9; push r8 - | push rdi; push rsi; push rbp; lea rbp, [rsp+88]; push rbp - | push rbx; push rdx; push rcx; push rax - | movzx RC, byte [rbp-8] // Reconstruct exit number. - | mov RCH, byte [rbp-16] - | mov [rbp-8], r15; mov [rbp-16], r14 - |.else - | push ebp; lea ebp, [esp+12]; push ebp - | push ebx; push edx; push ecx; push eax - | movzx RC, byte [ebp-4] // Reconstruct exit number. - | mov RCH, byte [ebp-8] - | mov [ebp-4], edi; mov [ebp-8], esi - |.endif - | // Caveat: DISPATCH is ebx. - | mov DISPATCH, [ebp] - | mov RA, [DISPATCH+DISPATCH_GL(vmstate)] // Get trace number. - | set_vmstate EXIT - | mov [DISPATCH+DISPATCH_J(exitno)], RC - | mov [DISPATCH+DISPATCH_J(parent)], RA - |.if X64 - |.if X64WIN - | sub rsp, 16*8+4*8 // Room for SSE regs + save area. - |.else - | sub rsp, 16*8 // Room for SSE regs. - |.endif - | add rbp, -128 - | movsd qword [rbp-8], xmm15; movsd qword [rbp-16], xmm14 - | movsd qword [rbp-24], xmm13; movsd qword [rbp-32], xmm12 - | movsd qword [rbp-40], xmm11; movsd qword [rbp-48], xmm10 - | movsd qword [rbp-56], xmm9; movsd qword [rbp-64], xmm8 - | movsd qword [rbp-72], xmm7; movsd qword [rbp-80], xmm6 - | movsd qword [rbp-88], xmm5; movsd qword [rbp-96], xmm4 - | movsd qword [rbp-104], xmm3; movsd qword [rbp-112], xmm2 - | movsd qword [rbp-120], xmm1; movsd qword [rbp-128], xmm0 - |.else - | sub esp, 8*8+16 // Room for SSE regs + args. - | movsd qword [ebp-40], xmm7; movsd qword [ebp-48], xmm6 - | movsd qword [ebp-56], xmm5; movsd qword [ebp-64], xmm4 - | movsd qword [ebp-72], xmm3; movsd qword [ebp-80], xmm2 - | movsd qword [ebp-88], xmm1; movsd qword [ebp-96], xmm0 - |.endif - | // Caveat: RB is ebp. - | mov L:RB, [DISPATCH+DISPATCH_GL(cur_L)] - | mov BASE, [DISPATCH+DISPATCH_GL(jit_base)] - | mov aword [DISPATCH+DISPATCH_J(L)], L:RBa - | mov L:RB->base, BASE - |.if X64WIN - | lea CARG2, [rsp+4*8] - |.elif X64 - | mov CARG2, rsp - |.else - | lea FCARG2, [esp+16] - |.endif - | lea FCARG1, [DISPATCH+GG_DISP2J] - | mov dword [DISPATCH+DISPATCH_GL(jit_base)], 0 - | call extern lj_trace_exit@8 // (jit_State *J, ExitState *ex) - | // MULTRES or negated error code returned in eax (RD). - | mov RAa, L:RB->cframe - | and RAa, CFRAME_RAWMASK - |.if X64WIN - | // Reposition stack later. - |.elif X64 - | mov rsp, RAa // Reposition stack to C frame. - |.else - | mov esp, RAa // Reposition stack to C frame. - |.endif - | mov [RAa+CFRAME_OFS_L], L:RB // Set SAVE_L (on-trace resume/yield). - | mov BASE, L:RB->base - | mov PC, [RAa+CFRAME_OFS_PC] // Get SAVE_PC. - |.if X64 - | jmp >1 - |.endif - |.endif - |->vm_exit_interp: - | // RD = MULTRES or negated error code, BASE, PC and DISPATCH set. - |.if JIT - |.if X64 - | // Restore additional callee-save registers only used in compiled code. - |.if X64WIN - | lea RAa, [rsp+9*16+4*8] - |1: - | movdqa xmm15, [RAa-9*16] - | movdqa xmm14, [RAa-8*16] - | movdqa xmm13, [RAa-7*16] - | movdqa xmm12, [RAa-6*16] - | movdqa xmm11, [RAa-5*16] - | movdqa xmm10, [RAa-4*16] - | movdqa xmm9, [RAa-3*16] - | movdqa xmm8, [RAa-2*16] - | movdqa xmm7, [RAa-1*16] - | mov rsp, RAa // Reposition stack to C frame. - | movdqa xmm6, [RAa] - | mov r15, CSAVE_3 - | mov r14, CSAVE_4 - |.else - | add rsp, 16 // Reposition stack to C frame. - |1: - |.endif - | mov r13, TMPa - | mov r12, TMPQ - |.endif - | test RD, RD; js >9 // Check for error from exit. - | mov L:RB, SAVE_L - | mov MULTRES, RD - | mov LFUNC:KBASE, [BASE-8] - | mov KBASE, LFUNC:KBASE->pc - | mov KBASE, [KBASE+PC2PROTO(k)] - | mov L:RB->base, BASE - | mov dword [DISPATCH+DISPATCH_GL(jit_base)], 0 - | set_vmstate INTERP - | // Modified copy of ins_next which handles function header dispatch, too. - | mov RC, [PC] - | movzx RA, RCH - | movzx OP, RCL - | add PC, 4 - | shr RC, 16 - | cmp OP, BC_FUNCF // Function header? - | jb >3 - | cmp OP, BC_FUNCC+2 // Fast function? - | jae >4 - |2: - | mov RC, MULTRES // RC/RD holds nres+1. - |3: - |.if X64 - | jmp aword [DISPATCH+OP*8] - |.else - | jmp aword [DISPATCH+OP*4] - |.endif - | - |4: // Check frame below fast function. - | mov RC, [BASE-4] - | test RC, FRAME_TYPE - | jnz <2 // Trace stitching continuation? - | // Otherwise set KBASE for Lua function below fast function. - | movzx RC, byte [RC-3] - | not RCa - | mov LFUNC:KBASE, [BASE+RC*8-8] - | mov KBASE, LFUNC:KBASE->pc - | mov KBASE, [KBASE+PC2PROTO(k)] - | jmp <2 - | - |9: // Rethrow error from the right C frame. - | neg RD - | mov FCARG1, L:RB - | mov FCARG2, RD - | call extern lj_err_throw@8 // (lua_State *L, int errcode) - |.endif - | - |//----------------------------------------------------------------------- - |//-- Math helper functions ---------------------------------------------- - |//----------------------------------------------------------------------- - | - |// FP value rounding. Called by math.floor/math.ceil fast functions - |// and from JIT code. arg/ret is xmm0. xmm0-xmm3 and RD (eax) modified. - |.macro vm_round, name, mode, cond - |->name: - |.if not X64 and cond - | movsd xmm0, qword [esp+4] - | call ->name .. _sse - | movsd qword [esp+4], xmm0 // Overwrite callee-owned arg. - | fld qword [esp+4] - | ret - |.endif - | - |->name .. _sse: - | sseconst_abs xmm2, RDa - | sseconst_2p52 xmm3, RDa - | movaps xmm1, xmm0 - | andpd xmm1, xmm2 // |x| - | ucomisd xmm3, xmm1 // No truncation if 2^52 <= |x|. - | jbe >1 - | andnpd xmm2, xmm0 // Isolate sign bit. - |.if mode == 2 // trunc(x)? - | movaps xmm0, xmm1 - | addsd xmm1, xmm3 // (|x| + 2^52) - 2^52 - | subsd xmm1, xmm3 - | sseconst_1 xmm3, RDa - | cmpsd xmm0, xmm1, 1 // |x| < result? - | andpd xmm0, xmm3 - | subsd xmm1, xmm0 // If yes, subtract -1. - | orpd xmm1, xmm2 // Merge sign bit back in. - |.else - | addsd xmm1, xmm3 // (|x| + 2^52) - 2^52 - | subsd xmm1, xmm3 - | orpd xmm1, xmm2 // Merge sign bit back in. - | .if mode == 1 // ceil(x)? - | sseconst_m1 xmm2, RDa // Must subtract -1 to preserve -0. - | cmpsd xmm0, xmm1, 6 // x > result? - | .else // floor(x)? - | sseconst_1 xmm2, RDa - | cmpsd xmm0, xmm1, 1 // x < result? - | .endif - | andpd xmm0, xmm2 - | subsd xmm1, xmm0 // If yes, subtract +-1. - |.endif - | movaps xmm0, xmm1 - |1: - | ret - |.endmacro - | - | vm_round vm_floor, 0, 1 - | vm_round vm_ceil, 1, JIT - | vm_round vm_trunc, 2, JIT - | - |// FP modulo x%y. Called by BC_MOD* and vm_arith. - |->vm_mod: - |// Args in xmm0/xmm1, return value in xmm0. - |// Caveat: xmm0-xmm5 and RC (eax) modified! - | movaps xmm5, xmm0 - | divsd xmm0, xmm1 - | sseconst_abs xmm2, RDa - | sseconst_2p52 xmm3, RDa - | movaps xmm4, xmm0 - | andpd xmm4, xmm2 // |x/y| - | ucomisd xmm3, xmm4 // No truncation if 2^52 <= |x/y|. - | jbe >1 - | andnpd xmm2, xmm0 // Isolate sign bit. - | addsd xmm4, xmm3 // (|x/y| + 2^52) - 2^52 - | subsd xmm4, xmm3 - | orpd xmm4, xmm2 // Merge sign bit back in. - | sseconst_1 xmm2, RDa - | cmpsd xmm0, xmm4, 1 // x/y < result? - | andpd xmm0, xmm2 - | subsd xmm4, xmm0 // If yes, subtract 1.0. - | movaps xmm0, xmm5 - | mulsd xmm1, xmm4 - | subsd xmm0, xmm1 - | ret - |1: - | mulsd xmm1, xmm0 - | movaps xmm0, xmm5 - | subsd xmm0, xmm1 - | ret - | - |// Args in xmm0/eax. Ret in xmm0. xmm0-xmm1 and eax modified. - |->vm_powi_sse: - | cmp eax, 1; jle >6 // i<=1? - | // Now 1 < (unsigned)i <= 0x80000000. - |1: // Handle leading zeros. - | test eax, 1; jnz >2 - | mulsd xmm0, xmm0 - | shr eax, 1 - | jmp <1 - |2: - | shr eax, 1; jz >5 - | movaps xmm1, xmm0 - |3: // Handle trailing bits. - | mulsd xmm0, xmm0 - | shr eax, 1; jz >4 - | jnc <3 - | mulsd xmm1, xmm0 - | jmp <3 - |4: - | mulsd xmm0, xmm1 - |5: - | ret - |6: - | je <5 // x^1 ==> x - | jb >7 // x^0 ==> 1 - | neg eax - | call <1 - | sseconst_1 xmm1, RDa - | divsd xmm1, xmm0 - | movaps xmm0, xmm1 - | ret - |7: - | sseconst_1 xmm0, RDa - | ret - | - |//----------------------------------------------------------------------- - |//-- Miscellaneous functions -------------------------------------------- - |//----------------------------------------------------------------------- - | - |// int lj_vm_cpuid(uint32_t f, uint32_t res[4]) - |->vm_cpuid: - |.if X64 - | mov eax, CARG1d - | .if X64WIN; push rsi; mov rsi, CARG2; .endif - | push rbx - | xor ecx, ecx - | cpuid - | mov [rsi], eax - | mov [rsi+4], ebx - | mov [rsi+8], ecx - | mov [rsi+12], edx - | pop rbx - | .if X64WIN; pop rsi; .endif - | ret - |.else - | pushfd - | pop edx - | mov ecx, edx - | xor edx, 0x00200000 // Toggle ID bit in flags. - | push edx - | popfd - | pushfd - | pop edx - | xor eax, eax // Zero means no features supported. - | cmp ecx, edx - | jz >1 // No ID toggle means no CPUID support. - | mov eax, [esp+4] // Argument 1 is function number. - | push edi - | push ebx - | xor ecx, ecx - | cpuid - | mov edi, [esp+16] // Argument 2 is result area. - | mov [edi], eax - | mov [edi+4], ebx - | mov [edi+8], ecx - | mov [edi+12], edx - | pop ebx - | pop edi - |1: - | ret - |.endif - | - |//----------------------------------------------------------------------- - |//-- Assertions --------------------------------------------------------- - |//----------------------------------------------------------------------- - | - |->assert_bad_for_arg_type: -#ifdef LUA_USE_ASSERT - | int3 -#endif - | int3 - | - |//----------------------------------------------------------------------- - |//-- FFI helper functions ----------------------------------------------- - |//----------------------------------------------------------------------- - | - |// Handler for callback functions. Callback slot number in ah/al. - |->vm_ffi_callback: - |.if FFI - |.type CTSTATE, CTState, PC - |.if not X64 - | sub esp, 16 // Leave room for SAVE_ERRF etc. - |.endif - | saveregs_ // ebp/rbp already saved. ebp now holds global_State *. - | lea DISPATCH, [ebp+GG_G2DISP] - | mov CTSTATE, GL:ebp->ctype_state - | movzx eax, ax - | mov CTSTATE->cb.slot, eax - |.if X64 - | mov CTSTATE->cb.gpr[0], CARG1 - | mov CTSTATE->cb.gpr[1], CARG2 - | mov CTSTATE->cb.gpr[2], CARG3 - | mov CTSTATE->cb.gpr[3], CARG4 - | movsd qword CTSTATE->cb.fpr[0], xmm0 - | movsd qword CTSTATE->cb.fpr[1], xmm1 - | movsd qword CTSTATE->cb.fpr[2], xmm2 - | movsd qword CTSTATE->cb.fpr[3], xmm3 - |.if X64WIN - | lea rax, [rsp+CFRAME_SIZE+4*8] - |.else - | lea rax, [rsp+CFRAME_SIZE] - | mov CTSTATE->cb.gpr[4], CARG5 - | mov CTSTATE->cb.gpr[5], CARG6 - | movsd qword CTSTATE->cb.fpr[4], xmm4 - | movsd qword CTSTATE->cb.fpr[5], xmm5 - | movsd qword CTSTATE->cb.fpr[6], xmm6 - | movsd qword CTSTATE->cb.fpr[7], xmm7 - |.endif - | mov CTSTATE->cb.stack, rax - | mov CARG2, rsp - |.else - | lea eax, [esp+CFRAME_SIZE+16] - | mov CTSTATE->cb.gpr[0], FCARG1 - | mov CTSTATE->cb.gpr[1], FCARG2 - | mov CTSTATE->cb.stack, eax - | mov FCARG1, [esp+CFRAME_SIZE+12] // Move around misplaced retaddr/ebp. - | mov FCARG2, [esp+CFRAME_SIZE+8] - | mov SAVE_RET, FCARG1 - | mov SAVE_R4, FCARG2 - | mov FCARG2, esp - |.endif - | mov SAVE_PC, CTSTATE // Any value outside of bytecode is ok. - | mov FCARG1, CTSTATE - | call extern lj_ccallback_enter@8 // (CTState *cts, void *cf) - | // lua_State * returned in eax (RD). - | set_vmstate INTERP - | mov BASE, L:RD->base - | mov RD, L:RD->top - | sub RD, BASE - | mov LFUNC:RB, [BASE-8] - | shr RD, 3 - | add RD, 1 - | ins_callt - |.endif - | - |->cont_ffi_callback: // Return from FFI callback. - |.if FFI - | mov L:RA, SAVE_L - | mov CTSTATE, [DISPATCH+DISPATCH_GL(ctype_state)] - | mov aword CTSTATE->L, L:RAa - | mov L:RA->base, BASE - | mov L:RA->top, RB - | mov FCARG1, CTSTATE - | mov FCARG2, RC - | call extern lj_ccallback_leave@8 // (CTState *cts, TValue *o) - |.if X64 - | mov rax, CTSTATE->cb.gpr[0] - | movsd xmm0, qword CTSTATE->cb.fpr[0] - | jmp ->vm_leave_unw - |.else - | mov L:RB, SAVE_L - | mov eax, CTSTATE->cb.gpr[0] - | mov edx, CTSTATE->cb.gpr[1] - | cmp dword CTSTATE->cb.gpr[2], 1 - | jb >7 - | je >6 - | fld qword CTSTATE->cb.fpr[0].d - | jmp >7 - |6: - | fld dword CTSTATE->cb.fpr[0].f - |7: - | mov ecx, L:RB->top - | movzx ecx, word [ecx+6] // Get stack adjustment and copy up. - | mov SAVE_L, ecx // Must be one slot above SAVE_RET - | restoreregs - | pop ecx // Move return addr from SAVE_RET. - | add esp, [esp] // Adjust stack. - | add esp, 16 - | push ecx - | ret - |.endif - |.endif - | - |->vm_ffi_call@4: // Call C function via FFI. - | // Caveat: needs special frame unwinding, see below. - |.if FFI - |.if X64 - | .type CCSTATE, CCallState, rbx - | push rbp; mov rbp, rsp; push rbx; mov CCSTATE, CARG1 - |.else - | .type CCSTATE, CCallState, ebx - | push ebp; mov ebp, esp; push ebx; mov CCSTATE, FCARG1 - |.endif - | - | // Readjust stack. - |.if X64 - | mov eax, CCSTATE->spadj - | sub rsp, rax - |.else - | sub esp, CCSTATE->spadj - |.if WIN - | mov CCSTATE->spadj, esp - |.endif - |.endif - | - | // Copy stack slots. - | movzx ecx, byte CCSTATE->nsp - | sub ecx, 1 - | js >2 - |1: - |.if X64 - | mov rax, [CCSTATE+rcx*8+offsetof(CCallState, stack)] - | mov [rsp+rcx*8+CCALL_SPS_EXTRA*8], rax - |.else - | mov eax, [CCSTATE+ecx*4+offsetof(CCallState, stack)] - | mov [esp+ecx*4], eax - |.endif - | sub ecx, 1 - | jns <1 - |2: - | - |.if X64 - | movzx eax, byte CCSTATE->nfpr - | mov CARG1, CCSTATE->gpr[0] - | mov CARG2, CCSTATE->gpr[1] - | mov CARG3, CCSTATE->gpr[2] - | mov CARG4, CCSTATE->gpr[3] - |.if not X64WIN - | mov CARG5, CCSTATE->gpr[4] - | mov CARG6, CCSTATE->gpr[5] - |.endif - | test eax, eax; jz >5 - | movaps xmm0, CCSTATE->fpr[0] - | movaps xmm1, CCSTATE->fpr[1] - | movaps xmm2, CCSTATE->fpr[2] - | movaps xmm3, CCSTATE->fpr[3] - |.if not X64WIN - | cmp eax, 4; jbe >5 - | movaps xmm4, CCSTATE->fpr[4] - | movaps xmm5, CCSTATE->fpr[5] - | movaps xmm6, CCSTATE->fpr[6] - | movaps xmm7, CCSTATE->fpr[7] - |.endif - |5: - |.else - | mov FCARG1, CCSTATE->gpr[0] - | mov FCARG2, CCSTATE->gpr[1] - |.endif - | - | call aword CCSTATE->func - | - |.if X64 - | mov CCSTATE->gpr[0], rax - | movaps CCSTATE->fpr[0], xmm0 - |.if not X64WIN - | mov CCSTATE->gpr[1], rdx - | movaps CCSTATE->fpr[1], xmm1 - |.endif - |.else - | mov CCSTATE->gpr[0], eax - | mov CCSTATE->gpr[1], edx - | cmp byte CCSTATE->resx87, 1 - | jb >7 - | je >6 - | fstp qword CCSTATE->fpr[0].d[0] - | jmp >7 - |6: - | fstp dword CCSTATE->fpr[0].f[0] - |7: - |.if WIN - | sub CCSTATE->spadj, esp - |.endif - |.endif - | - |.if X64 - | mov rbx, [rbp-8]; leave; ret - |.else - | mov ebx, [ebp-4]; leave; ret - |.endif - |.endif - |// Note: vm_ffi_call must be the last function in this object file! - | - |//----------------------------------------------------------------------- -} - -/* Generate the code for a single instruction. */ -static void build_ins(BuildCtx *ctx, BCOp op, int defop) -{ - int vk = 0; - |// Note: aligning all instructions does not pay off. - |=>defop: - - switch (op) { - - /* -- Comparison ops ---------------------------------------------------- */ - - /* Remember: all ops branch for a true comparison, fall through otherwise. */ - - |.macro jmp_comp, lt, ge, le, gt, target - ||switch (op) { - ||case BC_ISLT: - | lt target - ||break; - ||case BC_ISGE: - | ge target - ||break; - ||case BC_ISLE: - | le target - ||break; - ||case BC_ISGT: - | gt target - ||break; - ||default: break; /* Shut up GCC. */ - ||} - |.endmacro - - case BC_ISLT: case BC_ISGE: case BC_ISLE: case BC_ISGT: - | // RA = src1, RD = src2, JMP with RD = target - | ins_AD - |.if DUALNUM - | checkint RA, >7 - | checkint RD, >8 - | mov RB, dword [BASE+RA*8] - | add PC, 4 - | cmp RB, dword [BASE+RD*8] - | jmp_comp jge, jl, jg, jle, >9 - |6: - | movzx RD, PC_RD - | branchPC RD - |9: - | ins_next - | - |7: // RA is not an integer. - | ja ->vmeta_comp - | // RA is a number. - | cmp dword [BASE+RD*8+4], LJ_TISNUM; jb >1; jne ->vmeta_comp - | // RA is a number, RD is an integer. - | cvtsi2sd xmm0, dword [BASE+RD*8] - | jmp >2 - | - |8: // RA is an integer, RD is not an integer. - | ja ->vmeta_comp - | // RA is an integer, RD is a number. - | cvtsi2sd xmm1, dword [BASE+RA*8] - | movsd xmm0, qword [BASE+RD*8] - | add PC, 4 - | ucomisd xmm0, xmm1 - | jmp_comp jbe, ja, jb, jae, <9 - | jmp <6 - |.else - | checknum RA, ->vmeta_comp - | checknum RD, ->vmeta_comp - |.endif - |1: - | movsd xmm0, qword [BASE+RD*8] - |2: - | add PC, 4 - | ucomisd xmm0, qword [BASE+RA*8] - |3: - | // Unordered: all of ZF CF PF set, ordered: PF clear. - | // To preserve NaN semantics GE/GT branch on unordered, but LT/LE don't. - |.if DUALNUM - | jmp_comp jbe, ja, jb, jae, <9 - | jmp <6 - |.else - | jmp_comp jbe, ja, jb, jae, >1 - | movzx RD, PC_RD - | branchPC RD - |1: - | ins_next - |.endif - break; - - case BC_ISEQV: case BC_ISNEV: - vk = op == BC_ISEQV; - | ins_AD // RA = src1, RD = src2, JMP with RD = target - | mov RB, [BASE+RD*8+4] - | add PC, 4 - |.if DUALNUM - | cmp RB, LJ_TISNUM; jne >7 - | checkint RA, >8 - | mov RB, dword [BASE+RD*8] - | cmp RB, dword [BASE+RA*8] - if (vk) { - | jne >9 - } else { - | je >9 - } - | movzx RD, PC_RD - | branchPC RD - |9: - | ins_next - | - |7: // RD is not an integer. - | ja >5 - | // RD is a number. - | cmp dword [BASE+RA*8+4], LJ_TISNUM; jb >1; jne >5 - | // RD is a number, RA is an integer. - | cvtsi2sd xmm0, dword [BASE+RA*8] - | jmp >2 - | - |8: // RD is an integer, RA is not an integer. - | ja >5 - | // RD is an integer, RA is a number. - | cvtsi2sd xmm0, dword [BASE+RD*8] - | ucomisd xmm0, qword [BASE+RA*8] - | jmp >4 - | - |.else - | cmp RB, LJ_TISNUM; jae >5 - | checknum RA, >5 - |.endif - |1: - | movsd xmm0, qword [BASE+RA*8] - |2: - | ucomisd xmm0, qword [BASE+RD*8] - |4: - iseqne_fp: - if (vk) { - | jp >2 // Unordered means not equal. - | jne >2 - } else { - | jp >2 // Unordered means not equal. - | je >1 - } - iseqne_end: - if (vk) { - |1: // EQ: Branch to the target. - | movzx RD, PC_RD - | branchPC RD - |2: // NE: Fallthrough to next instruction. - |.if not FFI - |3: - |.endif - } else { - |.if not FFI - |3: - |.endif - |2: // NE: Branch to the target. - | movzx RD, PC_RD - | branchPC RD - |1: // EQ: Fallthrough to next instruction. - } - if (LJ_DUALNUM && (op == BC_ISEQV || op == BC_ISNEV || - op == BC_ISEQN || op == BC_ISNEN)) { - | jmp <9 - } else { - | ins_next - } - | - if (op == BC_ISEQV || op == BC_ISNEV) { - |5: // Either or both types are not numbers. - |.if FFI - | cmp RB, LJ_TCDATA; je ->vmeta_equal_cd - | checktp RA, LJ_TCDATA; je ->vmeta_equal_cd - |.endif - | checktp RA, RB // Compare types. - | jne <2 // Not the same type? - | cmp RB, LJ_TISPRI - | jae <1 // Same type and primitive type? - | - | // Same types and not a primitive type. Compare GCobj or pvalue. - | mov RA, [BASE+RA*8] - | mov RD, [BASE+RD*8] - | cmp RA, RD - | je <1 // Same GCobjs or pvalues? - | cmp RB, LJ_TISTABUD - | ja <2 // Different objects and not table/ud? - |.if X64 - | cmp RB, LJ_TUDATA // And not 64 bit lightuserdata. - | jb <2 - |.endif - | - | // Different tables or userdatas. Need to check __eq metamethod. - | // Field metatable must be at same offset for GCtab and GCudata! - | mov TAB:RB, TAB:RA->metatable - | test TAB:RB, TAB:RB - | jz <2 // No metatable? - | test byte TAB:RB->nomm, 1<<MM_eq - | jnz <2 // Or 'no __eq' flag set? - if (vk) { - | xor RB, RB // ne = 0 - } else { - | mov RB, 1 // ne = 1 - } - | jmp ->vmeta_equal // Handle __eq metamethod. - } else { - |.if FFI - |3: - | cmp RB, LJ_TCDATA - if (LJ_DUALNUM && vk) { - | jne <9 - } else { - | jne <2 - } - | jmp ->vmeta_equal_cd - |.endif - } - break; - case BC_ISEQS: case BC_ISNES: - vk = op == BC_ISEQS; - | ins_AND // RA = src, RD = str const, JMP with RD = target - | mov RB, [BASE+RA*8+4] - | add PC, 4 - | cmp RB, LJ_TSTR; jne >3 - | mov RA, [BASE+RA*8] - | cmp RA, [KBASE+RD*4] - iseqne_test: - if (vk) { - | jne >2 - } else { - | je >1 - } - goto iseqne_end; - case BC_ISEQN: case BC_ISNEN: - vk = op == BC_ISEQN; - | ins_AD // RA = src, RD = num const, JMP with RD = target - | mov RB, [BASE+RA*8+4] - | add PC, 4 - |.if DUALNUM - | cmp RB, LJ_TISNUM; jne >7 - | cmp dword [KBASE+RD*8+4], LJ_TISNUM; jne >8 - | mov RB, dword [KBASE+RD*8] - | cmp RB, dword [BASE+RA*8] - if (vk) { - | jne >9 - } else { - | je >9 - } - | movzx RD, PC_RD - | branchPC RD - |9: - | ins_next - | - |7: // RA is not an integer. - | ja >3 - | // RA is a number. - | cmp dword [KBASE+RD*8+4], LJ_TISNUM; jb >1 - | // RA is a number, RD is an integer. - | cvtsi2sd xmm0, dword [KBASE+RD*8] - | jmp >2 - | - |8: // RA is an integer, RD is a number. - | cvtsi2sd xmm0, dword [BASE+RA*8] - | ucomisd xmm0, qword [KBASE+RD*8] - | jmp >4 - |.else - | cmp RB, LJ_TISNUM; jae >3 - |.endif - |1: - | movsd xmm0, qword [KBASE+RD*8] - |2: - | ucomisd xmm0, qword [BASE+RA*8] - |4: - goto iseqne_fp; - case BC_ISEQP: case BC_ISNEP: - vk = op == BC_ISEQP; - | ins_AND // RA = src, RD = primitive type (~), JMP with RD = target - | mov RB, [BASE+RA*8+4] - | add PC, 4 - | cmp RB, RD - if (!LJ_HASFFI) goto iseqne_test; - if (vk) { - | jne >3 - | movzx RD, PC_RD - | branchPC RD - |2: - | ins_next - |3: - | cmp RB, LJ_TCDATA; jne <2 - | jmp ->vmeta_equal_cd - } else { - | je >2 - | cmp RB, LJ_TCDATA; je ->vmeta_equal_cd - | movzx RD, PC_RD - | branchPC RD - |2: - | ins_next - } - break; - - /* -- Unary test and copy ops ------------------------------------------- */ - - case BC_ISTC: case BC_ISFC: case BC_IST: case BC_ISF: - | ins_AD // RA = dst or unused, RD = src, JMP with RD = target - | mov RB, [BASE+RD*8+4] - | add PC, 4 - | cmp RB, LJ_TISTRUECOND - if (op == BC_IST || op == BC_ISTC) { - | jae >1 - } else { - | jb >1 - } - if (op == BC_ISTC || op == BC_ISFC) { - | mov [BASE+RA*8+4], RB - | mov RB, [BASE+RD*8] - | mov [BASE+RA*8], RB - } - | movzx RD, PC_RD - | branchPC RD - |1: // Fallthrough to the next instruction. - | ins_next - break; - - case BC_ISTYPE: - | ins_AD // RA = src, RD = -type - | add RD, [BASE+RA*8+4] - | jne ->vmeta_istype - | ins_next - break; - case BC_ISNUM: - | ins_AD // RA = src, RD = -(TISNUM-1) - | checknum RA, ->vmeta_istype - | ins_next - break; - - /* -- Unary ops --------------------------------------------------------- */ - - case BC_MOV: - | ins_AD // RA = dst, RD = src - |.if X64 - | mov RBa, [BASE+RD*8] - | mov [BASE+RA*8], RBa - |.else - | mov RB, [BASE+RD*8+4] - | mov RD, [BASE+RD*8] - | mov [BASE+RA*8+4], RB - | mov [BASE+RA*8], RD - |.endif - | ins_next_ - break; - case BC_NOT: - | ins_AD // RA = dst, RD = src - | xor RB, RB - | checktp RD, LJ_TISTRUECOND - | adc RB, LJ_TTRUE - | mov [BASE+RA*8+4], RB - | ins_next - break; - case BC_UNM: - | ins_AD // RA = dst, RD = src - |.if DUALNUM - | checkint RD, >5 - | mov RB, [BASE+RD*8] - | neg RB - | jo >4 - | mov dword [BASE+RA*8+4], LJ_TISNUM - | mov dword [BASE+RA*8], RB - |9: - | ins_next - |4: - | mov dword [BASE+RA*8+4], 0x41e00000 // 2^31. - | mov dword [BASE+RA*8], 0 - | jmp <9 - |5: - | ja ->vmeta_unm - |.else - | checknum RD, ->vmeta_unm - |.endif - | movsd xmm0, qword [BASE+RD*8] - | sseconst_sign xmm1, RDa - | xorps xmm0, xmm1 - | movsd qword [BASE+RA*8], xmm0 - |.if DUALNUM - | jmp <9 - |.else - | ins_next - |.endif - break; - case BC_LEN: - | ins_AD // RA = dst, RD = src - | checkstr RD, >2 - | mov STR:RD, [BASE+RD*8] - |.if DUALNUM - | mov RD, dword STR:RD->len - |1: - | mov dword [BASE+RA*8+4], LJ_TISNUM - | mov dword [BASE+RA*8], RD - |.else - | xorps xmm0, xmm0 - | cvtsi2sd xmm0, dword STR:RD->len - |1: - | movsd qword [BASE+RA*8], xmm0 - |.endif - | ins_next - |2: - | checktab RD, ->vmeta_len - | mov TAB:FCARG1, [BASE+RD*8] -#if LJ_52 - | mov TAB:RB, TAB:FCARG1->metatable - | cmp TAB:RB, 0 - | jnz >9 - |3: -#endif - |->BC_LEN_Z: - | mov RB, BASE // Save BASE. - | call extern lj_tab_len@4 // (GCtab *t) - | // Length of table returned in eax (RD). - |.if DUALNUM - | // Nothing to do. - |.else - | cvtsi2sd xmm0, RD - |.endif - | mov BASE, RB // Restore BASE. - | movzx RA, PC_RA - | jmp <1 -#if LJ_52 - |9: // Check for __len. - | test byte TAB:RB->nomm, 1<<MM_len - | jnz <3 - | jmp ->vmeta_len // 'no __len' flag NOT set: check. -#endif - break; - - /* -- Binary ops -------------------------------------------------------- */ - - |.macro ins_arithpre, sseins, ssereg - | ins_ABC - ||vk = ((int)op - BC_ADDVN) / (BC_ADDNV-BC_ADDVN); - ||switch (vk) { - ||case 0: - | checknum RB, ->vmeta_arith_vn - | .if DUALNUM - | cmp dword [KBASE+RC*8+4], LJ_TISNUM; jae ->vmeta_arith_vn - | .endif - | movsd xmm0, qword [BASE+RB*8] - | sseins ssereg, qword [KBASE+RC*8] - || break; - ||case 1: - | checknum RB, ->vmeta_arith_nv - | .if DUALNUM - | cmp dword [KBASE+RC*8+4], LJ_TISNUM; jae ->vmeta_arith_nv - | .endif - | movsd xmm0, qword [KBASE+RC*8] - | sseins ssereg, qword [BASE+RB*8] - || break; - ||default: - | checknum RB, ->vmeta_arith_vv - | checknum RC, ->vmeta_arith_vv - | movsd xmm0, qword [BASE+RB*8] - | sseins ssereg, qword [BASE+RC*8] - || break; - ||} - |.endmacro - | - |.macro ins_arithdn, intins - | ins_ABC - ||vk = ((int)op - BC_ADDVN) / (BC_ADDNV-BC_ADDVN); - ||switch (vk) { - ||case 0: - | checkint RB, ->vmeta_arith_vn - | cmp dword [KBASE+RC*8+4], LJ_TISNUM; jne ->vmeta_arith_vn - | mov RB, [BASE+RB*8] - | intins RB, [KBASE+RC*8]; jo ->vmeta_arith_vno - || break; - ||case 1: - | checkint RB, ->vmeta_arith_nv - | cmp dword [KBASE+RC*8+4], LJ_TISNUM; jne ->vmeta_arith_nv - | mov RC, [KBASE+RC*8] - | intins RC, [BASE+RB*8]; jo ->vmeta_arith_nvo - || break; - ||default: - | checkint RB, ->vmeta_arith_vv - | checkint RC, ->vmeta_arith_vv - | mov RB, [BASE+RB*8] - | intins RB, [BASE+RC*8]; jo ->vmeta_arith_vvo - || break; - ||} - | mov dword [BASE+RA*8+4], LJ_TISNUM - ||if (vk == 1) { - | mov dword [BASE+RA*8], RC - ||} else { - | mov dword [BASE+RA*8], RB - ||} - | ins_next - |.endmacro - | - |.macro ins_arithpost - | movsd qword [BASE+RA*8], xmm0 - |.endmacro - | - |.macro ins_arith, sseins - | ins_arithpre sseins, xmm0 - | ins_arithpost - | ins_next - |.endmacro - | - |.macro ins_arith, intins, sseins - |.if DUALNUM - | ins_arithdn intins - |.else - | ins_arith, sseins - |.endif - |.endmacro - - | // RA = dst, RB = src1 or num const, RC = src2 or num const - case BC_ADDVN: case BC_ADDNV: case BC_ADDVV: - | ins_arith add, addsd - break; - case BC_SUBVN: case BC_SUBNV: case BC_SUBVV: - | ins_arith sub, subsd - break; - case BC_MULVN: case BC_MULNV: case BC_MULVV: - | ins_arith imul, mulsd - break; - case BC_DIVVN: case BC_DIVNV: case BC_DIVVV: - | ins_arith divsd - break; - case BC_MODVN: - | ins_arithpre movsd, xmm1 - |->BC_MODVN_Z: - | call ->vm_mod - | ins_arithpost - | ins_next - break; - case BC_MODNV: case BC_MODVV: - | ins_arithpre movsd, xmm1 - | jmp ->BC_MODVN_Z // Avoid 3 copies. It's slow anyway. - break; - case BC_POW: - | ins_arithpre movsd, xmm1 - | mov RB, BASE - |.if not X64 - | movsd FPARG1, xmm0 - | movsd FPARG3, xmm1 - |.endif - | call extern pow - | movzx RA, PC_RA - | mov BASE, RB - |.if X64 - | ins_arithpost - |.else - | fstp qword [BASE+RA*8] - |.endif - | ins_next - break; - - case BC_CAT: - | ins_ABC // RA = dst, RB = src_start, RC = src_end - |.if X64 - | mov L:CARG1d, SAVE_L - | mov L:CARG1d->base, BASE - | lea CARG2d, [BASE+RC*8] - | mov CARG3d, RC - | sub CARG3d, RB - |->BC_CAT_Z: - | mov L:RB, L:CARG1d - |.else - | lea RA, [BASE+RC*8] - | sub RC, RB - | mov ARG2, RA - | mov ARG3, RC - |->BC_CAT_Z: - | mov L:RB, SAVE_L - | mov ARG1, L:RB - | mov L:RB->base, BASE - |.endif - | mov SAVE_PC, PC - | call extern lj_meta_cat // (lua_State *L, TValue *top, int left) - | // NULL (finished) or TValue * (metamethod) returned in eax (RC). - | mov BASE, L:RB->base - | test RC, RC - | jnz ->vmeta_binop - | movzx RB, PC_RB // Copy result to Stk[RA] from Stk[RB]. - | movzx RA, PC_RA - |.if X64 - | mov RCa, [BASE+RB*8] - | mov [BASE+RA*8], RCa - |.else - | mov RC, [BASE+RB*8+4] - | mov RB, [BASE+RB*8] - | mov [BASE+RA*8+4], RC - | mov [BASE+RA*8], RB - |.endif - | ins_next - break; - - /* -- Constant ops ------------------------------------------------------ */ - - case BC_KSTR: - | ins_AND // RA = dst, RD = str const (~) - | mov RD, [KBASE+RD*4] - | mov dword [BASE+RA*8+4], LJ_TSTR - | mov [BASE+RA*8], RD - | ins_next - break; - case BC_KCDATA: - |.if FFI - | ins_AND // RA = dst, RD = cdata const (~) - | mov RD, [KBASE+RD*4] - | mov dword [BASE+RA*8+4], LJ_TCDATA - | mov [BASE+RA*8], RD - | ins_next - |.endif - break; - case BC_KSHORT: - | ins_AD // RA = dst, RD = signed int16 literal - |.if DUALNUM - | movsx RD, RDW - | mov dword [BASE+RA*8+4], LJ_TISNUM - | mov dword [BASE+RA*8], RD - |.else - | movsx RD, RDW // Sign-extend literal. - | cvtsi2sd xmm0, RD - | movsd qword [BASE+RA*8], xmm0 - |.endif - | ins_next - break; - case BC_KNUM: - | ins_AD // RA = dst, RD = num const - | movsd xmm0, qword [KBASE+RD*8] - | movsd qword [BASE+RA*8], xmm0 - | ins_next - break; - case BC_KPRI: - | ins_AND // RA = dst, RD = primitive type (~) - | mov [BASE+RA*8+4], RD - | ins_next - break; - case BC_KNIL: - | ins_AD // RA = dst_start, RD = dst_end - | lea RA, [BASE+RA*8+12] - | lea RD, [BASE+RD*8+4] - | mov RB, LJ_TNIL - | mov [RA-8], RB // Sets minimum 2 slots. - |1: - | mov [RA], RB - | add RA, 8 - | cmp RA, RD - | jbe <1 - | ins_next - break; - - /* -- Upvalue and function ops ------------------------------------------ */ - - case BC_UGET: - | ins_AD // RA = dst, RD = upvalue # - | mov LFUNC:RB, [BASE-8] - | mov UPVAL:RB, [LFUNC:RB+RD*4+offsetof(GCfuncL, uvptr)] - | mov RB, UPVAL:RB->v - |.if X64 - | mov RDa, [RB] - | mov [BASE+RA*8], RDa - |.else - | mov RD, [RB+4] - | mov RB, [RB] - | mov [BASE+RA*8+4], RD - | mov [BASE+RA*8], RB - |.endif - | ins_next - break; - case BC_USETV: -#define TV2MARKOFS \ - ((int32_t)offsetof(GCupval, marked)-(int32_t)offsetof(GCupval, tv)) - | ins_AD // RA = upvalue #, RD = src - | mov LFUNC:RB, [BASE-8] - | mov UPVAL:RB, [LFUNC:RB+RA*4+offsetof(GCfuncL, uvptr)] - | cmp byte UPVAL:RB->closed, 0 - | mov RB, UPVAL:RB->v - | mov RA, [BASE+RD*8] - | mov RD, [BASE+RD*8+4] - | mov [RB], RA - | mov [RB+4], RD - | jz >1 - | // Check barrier for closed upvalue. - | test byte [RB+TV2MARKOFS], LJ_GC_BLACK // isblack(uv) - | jnz >2 - |1: - | ins_next - | - |2: // Upvalue is black. Check if new value is collectable and white. - | sub RD, LJ_TISGCV - | cmp RD, LJ_TNUMX - LJ_TISGCV // tvisgcv(v) - | jbe <1 - | test byte GCOBJ:RA->gch.marked, LJ_GC_WHITES // iswhite(v) - | jz <1 - | // Crossed a write barrier. Move the barrier forward. - |.if X64 and not X64WIN - | mov FCARG2, RB - | mov RB, BASE // Save BASE. - |.else - | xchg FCARG2, RB // Save BASE (FCARG2 == BASE). - |.endif - | lea GL:FCARG1, [DISPATCH+GG_DISP2G] - | call extern lj_gc_barrieruv@8 // (global_State *g, TValue *tv) - | mov BASE, RB // Restore BASE. - | jmp <1 - break; -#undef TV2MARKOFS - case BC_USETS: - | ins_AND // RA = upvalue #, RD = str const (~) - | mov LFUNC:RB, [BASE-8] - | mov UPVAL:RB, [LFUNC:RB+RA*4+offsetof(GCfuncL, uvptr)] - | mov GCOBJ:RA, [KBASE+RD*4] - | mov RD, UPVAL:RB->v - | mov [RD], GCOBJ:RA - | mov dword [RD+4], LJ_TSTR - | test byte UPVAL:RB->marked, LJ_GC_BLACK // isblack(uv) - | jnz >2 - |1: - | ins_next - | - |2: // Check if string is white and ensure upvalue is closed. - | test byte GCOBJ:RA->gch.marked, LJ_GC_WHITES // iswhite(str) - | jz <1 - | cmp byte UPVAL:RB->closed, 0 - | jz <1 - | // Crossed a write barrier. Move the barrier forward. - | mov RB, BASE // Save BASE (FCARG2 == BASE). - | mov FCARG2, RD - | lea GL:FCARG1, [DISPATCH+GG_DISP2G] - | call extern lj_gc_barrieruv@8 // (global_State *g, TValue *tv) - | mov BASE, RB // Restore BASE. - | jmp <1 - break; - case BC_USETN: - | ins_AD // RA = upvalue #, RD = num const - | mov LFUNC:RB, [BASE-8] - | movsd xmm0, qword [KBASE+RD*8] - | mov UPVAL:RB, [LFUNC:RB+RA*4+offsetof(GCfuncL, uvptr)] - | mov RA, UPVAL:RB->v - | movsd qword [RA], xmm0 - | ins_next - break; - case BC_USETP: - | ins_AND // RA = upvalue #, RD = primitive type (~) - | mov LFUNC:RB, [BASE-8] - | mov UPVAL:RB, [LFUNC:RB+RA*4+offsetof(GCfuncL, uvptr)] - | mov RA, UPVAL:RB->v - | mov [RA+4], RD - | ins_next - break; - case BC_UCLO: - | ins_AD // RA = level, RD = target - | branchPC RD // Do this first to free RD. - | mov L:RB, SAVE_L - | cmp dword L:RB->openupval, 0 - | je >1 - | mov L:RB->base, BASE - | lea FCARG2, [BASE+RA*8] // Caveat: FCARG2 == BASE - | mov L:FCARG1, L:RB // Caveat: FCARG1 == RA - | call extern lj_func_closeuv@8 // (lua_State *L, TValue *level) - | mov BASE, L:RB->base - |1: - | ins_next - break; - - case BC_FNEW: - | ins_AND // RA = dst, RD = proto const (~) (holding function prototype) - |.if X64 - | mov L:RB, SAVE_L - | mov L:RB->base, BASE // Caveat: CARG2d/CARG3d may be BASE. - | mov CARG3d, [BASE-8] - | mov CARG2d, [KBASE+RD*4] // Fetch GCproto *. - | mov CARG1d, L:RB - |.else - | mov LFUNC:RA, [BASE-8] - | mov PROTO:RD, [KBASE+RD*4] // Fetch GCproto *. - | mov L:RB, SAVE_L - | mov ARG3, LFUNC:RA - | mov ARG2, PROTO:RD - | mov ARG1, L:RB - | mov L:RB->base, BASE - |.endif - | mov SAVE_PC, PC - | // (lua_State *L, GCproto *pt, GCfuncL *parent) - | call extern lj_func_newL_gc - | // GCfuncL * returned in eax (RC). - | mov BASE, L:RB->base - | movzx RA, PC_RA - | mov [BASE+RA*8], LFUNC:RC - | mov dword [BASE+RA*8+4], LJ_TFUNC - | ins_next - break; - - /* -- Table ops --------------------------------------------------------- */ - - case BC_TNEW: - | ins_AD // RA = dst, RD = hbits|asize - | mov L:RB, SAVE_L - | mov L:RB->base, BASE - | mov RA, [DISPATCH+DISPATCH_GL(gc.total)] - | cmp RA, [DISPATCH+DISPATCH_GL(gc.threshold)] - | mov SAVE_PC, PC - | jae >5 - |1: - |.if X64 - | mov CARG3d, RD - | and RD, 0x7ff - | shr CARG3d, 11 - |.else - | mov RA, RD - | and RD, 0x7ff - | shr RA, 11 - | mov ARG3, RA - |.endif - | cmp RD, 0x7ff - | je >3 - |2: - |.if X64 - | mov L:CARG1d, L:RB - | mov CARG2d, RD - |.else - | mov ARG1, L:RB - | mov ARG2, RD - |.endif - | call extern lj_tab_new // (lua_State *L, int32_t asize, uint32_t hbits) - | // Table * returned in eax (RC). - | mov BASE, L:RB->base - | movzx RA, PC_RA - | mov [BASE+RA*8], TAB:RC - | mov dword [BASE+RA*8+4], LJ_TTAB - | ins_next - |3: // Turn 0x7ff into 0x801. - | mov RD, 0x801 - | jmp <2 - |5: - | mov L:FCARG1, L:RB - | call extern lj_gc_step_fixtop@4 // (lua_State *L) - | movzx RD, PC_RD - | jmp <1 - break; - case BC_TDUP: - | ins_AND // RA = dst, RD = table const (~) (holding template table) - | mov L:RB, SAVE_L - | mov RA, [DISPATCH+DISPATCH_GL(gc.total)] - | mov SAVE_PC, PC - | cmp RA, [DISPATCH+DISPATCH_GL(gc.threshold)] - | mov L:RB->base, BASE - | jae >3 - |2: - | mov TAB:FCARG2, [KBASE+RD*4] // Caveat: FCARG2 == BASE - | mov L:FCARG1, L:RB // Caveat: FCARG1 == RA - | call extern lj_tab_dup@8 // (lua_State *L, Table *kt) - | // Table * returned in eax (RC). - | mov BASE, L:RB->base - | movzx RA, PC_RA - | mov [BASE+RA*8], TAB:RC - | mov dword [BASE+RA*8+4], LJ_TTAB - | ins_next - |3: - | mov L:FCARG1, L:RB - | call extern lj_gc_step_fixtop@4 // (lua_State *L) - | movzx RD, PC_RD // Need to reload RD. - | not RDa - | jmp <2 - break; - - case BC_GGET: - | ins_AND // RA = dst, RD = str const (~) - | mov LFUNC:RB, [BASE-8] - | mov TAB:RB, LFUNC:RB->env - | mov STR:RC, [KBASE+RD*4] - | jmp ->BC_TGETS_Z - break; - case BC_GSET: - | ins_AND // RA = src, RD = str const (~) - | mov LFUNC:RB, [BASE-8] - | mov TAB:RB, LFUNC:RB->env - | mov STR:RC, [KBASE+RD*4] - | jmp ->BC_TSETS_Z - break; - - case BC_TGETV: - | ins_ABC // RA = dst, RB = table, RC = key - | checktab RB, ->vmeta_tgetv - | mov TAB:RB, [BASE+RB*8] - | - | // Integer key? - |.if DUALNUM - | checkint RC, >5 - | mov RC, dword [BASE+RC*8] - |.else - | // Convert number to int and back and compare. - | checknum RC, >5 - | movsd xmm0, qword [BASE+RC*8] - | cvttsd2si RC, xmm0 - | cvtsi2sd xmm1, RC - | ucomisd xmm0, xmm1 - | jne ->vmeta_tgetv // Generic numeric key? Use fallback. - |.endif - | cmp RC, TAB:RB->asize // Takes care of unordered, too. - | jae ->vmeta_tgetv // Not in array part? Use fallback. - | shl RC, 3 - | add RC, TAB:RB->array - | cmp dword [RC+4], LJ_TNIL // Avoid overwriting RB in fastpath. - | je >2 - | // Get array slot. - |.if X64 - | mov RBa, [RC] - | mov [BASE+RA*8], RBa - |.else - | mov RB, [RC] - | mov RC, [RC+4] - | mov [BASE+RA*8], RB - | mov [BASE+RA*8+4], RC - |.endif - |1: - | ins_next - | - |2: // Check for __index if table value is nil. - | cmp dword TAB:RB->metatable, 0 // Shouldn't overwrite RA for fastpath. - | jz >3 - | mov TAB:RA, TAB:RB->metatable - | test byte TAB:RA->nomm, 1<<MM_index - | jz ->vmeta_tgetv // 'no __index' flag NOT set: check. - | movzx RA, PC_RA // Restore RA. - |3: - | mov dword [BASE+RA*8+4], LJ_TNIL - | jmp <1 - | - |5: // String key? - | checkstr RC, ->vmeta_tgetv - | mov STR:RC, [BASE+RC*8] - | jmp ->BC_TGETS_Z - break; - case BC_TGETS: - | ins_ABC // RA = dst, RB = table, RC = str const (~) - | not RCa - | mov STR:RC, [KBASE+RC*4] - | checktab RB, ->vmeta_tgets - | mov TAB:RB, [BASE+RB*8] - |->BC_TGETS_Z: // RB = GCtab *, RC = GCstr *, refetches PC_RA. - | mov RA, TAB:RB->hmask - | and RA, STR:RC->hash - | imul RA, #NODE - | add NODE:RA, TAB:RB->node - |1: - | cmp dword NODE:RA->key.it, LJ_TSTR - | jne >4 - | cmp dword NODE:RA->key.gcr, STR:RC - | jne >4 - | // Ok, key found. Assumes: offsetof(Node, val) == 0 - | cmp dword [RA+4], LJ_TNIL // Avoid overwriting RB in fastpath. - | je >5 // Key found, but nil value? - | movzx RC, PC_RA - | // Get node value. - |.if X64 - | mov RBa, [RA] - | mov [BASE+RC*8], RBa - |.else - | mov RB, [RA] - | mov RA, [RA+4] - | mov [BASE+RC*8], RB - | mov [BASE+RC*8+4], RA - |.endif - |2: - | ins_next - | - |3: - | movzx RC, PC_RA - | mov dword [BASE+RC*8+4], LJ_TNIL - | jmp <2 - | - |4: // Follow hash chain. - | mov NODE:RA, NODE:RA->next - | test NODE:RA, NODE:RA - | jnz <1 - | // End of hash chain: key not found, nil result. - | - |5: // Check for __index if table value is nil. - | mov TAB:RA, TAB:RB->metatable - | test TAB:RA, TAB:RA - | jz <3 // No metatable: done. - | test byte TAB:RA->nomm, 1<<MM_index - | jnz <3 // 'no __index' flag set: done. - | jmp ->vmeta_tgets // Caveat: preserve STR:RC. - break; - case BC_TGETB: - | ins_ABC // RA = dst, RB = table, RC = byte literal - | checktab RB, ->vmeta_tgetb - | mov TAB:RB, [BASE+RB*8] - | cmp RC, TAB:RB->asize - | jae ->vmeta_tgetb - | shl RC, 3 - | add RC, TAB:RB->array - | cmp dword [RC+4], LJ_TNIL // Avoid overwriting RB in fastpath. - | je >2 - | // Get array slot. - |.if X64 - | mov RBa, [RC] - | mov [BASE+RA*8], RBa - |.else - | mov RB, [RC] - | mov RC, [RC+4] - | mov [BASE+RA*8], RB - | mov [BASE+RA*8+4], RC - |.endif - |1: - | ins_next - | - |2: // Check for __index if table value is nil. - | cmp dword TAB:RB->metatable, 0 // Shouldn't overwrite RA for fastpath. - | jz >3 - | mov TAB:RA, TAB:RB->metatable - | test byte TAB:RA->nomm, 1<<MM_index - | jz ->vmeta_tgetb // 'no __index' flag NOT set: check. - | movzx RA, PC_RA // Restore RA. - |3: - | mov dword [BASE+RA*8+4], LJ_TNIL - | jmp <1 - break; - case BC_TGETR: - | ins_ABC // RA = dst, RB = table, RC = key - | mov TAB:RB, [BASE+RB*8] - |.if DUALNUM - | mov RC, dword [BASE+RC*8] - |.else - | cvttsd2si RC, qword [BASE+RC*8] - |.endif - | cmp RC, TAB:RB->asize - | jae ->vmeta_tgetr // Not in array part? Use fallback. - | shl RC, 3 - | add RC, TAB:RB->array - | // Get array slot. - |->BC_TGETR_Z: - |.if X64 - | mov RBa, [RC] - | mov [BASE+RA*8], RBa - |.else - | mov RB, [RC] - | mov RC, [RC+4] - | mov [BASE+RA*8], RB - | mov [BASE+RA*8+4], RC - |.endif - |->BC_TGETR2_Z: - | ins_next - break; - - case BC_TSETV: - | ins_ABC // RA = src, RB = table, RC = key - | checktab RB, ->vmeta_tsetv - | mov TAB:RB, [BASE+RB*8] - | - | // Integer key? - |.if DUALNUM - | checkint RC, >5 - | mov RC, dword [BASE+RC*8] - |.else - | // Convert number to int and back and compare. - | checknum RC, >5 - | movsd xmm0, qword [BASE+RC*8] - | cvttsd2si RC, xmm0 - | cvtsi2sd xmm1, RC - | ucomisd xmm0, xmm1 - | jne ->vmeta_tsetv // Generic numeric key? Use fallback. - |.endif - | cmp RC, TAB:RB->asize // Takes care of unordered, too. - | jae ->vmeta_tsetv - | shl RC, 3 - | add RC, TAB:RB->array - | cmp dword [RC+4], LJ_TNIL - | je >3 // Previous value is nil? - |1: - | test byte TAB:RB->marked, LJ_GC_BLACK // isblack(table) - | jnz >7 - |2: // Set array slot. - |.if X64 - | mov RBa, [BASE+RA*8] - | mov [RC], RBa - |.else - | mov RB, [BASE+RA*8+4] - | mov RA, [BASE+RA*8] - | mov [RC+4], RB - | mov [RC], RA - |.endif - | ins_next - | - |3: // Check for __newindex if previous value is nil. - | cmp dword TAB:RB->metatable, 0 // Shouldn't overwrite RA for fastpath. - | jz <1 - | mov TAB:RA, TAB:RB->metatable - | test byte TAB:RA->nomm, 1<<MM_newindex - | jz ->vmeta_tsetv // 'no __newindex' flag NOT set: check. - | movzx RA, PC_RA // Restore RA. - | jmp <1 - | - |5: // String key? - | checkstr RC, ->vmeta_tsetv - | mov STR:RC, [BASE+RC*8] - | jmp ->BC_TSETS_Z - | - |7: // Possible table write barrier for the value. Skip valiswhite check. - | barrierback TAB:RB, RA - | movzx RA, PC_RA // Restore RA. - | jmp <2 - break; - case BC_TSETS: - | ins_ABC // RA = src, RB = table, RC = str const (~) - | not RCa - | mov STR:RC, [KBASE+RC*4] - | checktab RB, ->vmeta_tsets - | mov TAB:RB, [BASE+RB*8] - |->BC_TSETS_Z: // RB = GCtab *, RC = GCstr *, refetches PC_RA. - | mov RA, TAB:RB->hmask - | and RA, STR:RC->hash - | imul RA, #NODE - | mov byte TAB:RB->nomm, 0 // Clear metamethod cache. - | add NODE:RA, TAB:RB->node - |1: - | cmp dword NODE:RA->key.it, LJ_TSTR - | jne >5 - | cmp dword NODE:RA->key.gcr, STR:RC - | jne >5 - | // Ok, key found. Assumes: offsetof(Node, val) == 0 - | cmp dword [RA+4], LJ_TNIL - | je >4 // Previous value is nil? - |2: - | test byte TAB:RB->marked, LJ_GC_BLACK // isblack(table) - | jnz >7 - |3: // Set node value. - | movzx RC, PC_RA - |.if X64 - | mov RBa, [BASE+RC*8] - | mov [RA], RBa - |.else - | mov RB, [BASE+RC*8+4] - | mov RC, [BASE+RC*8] - | mov [RA+4], RB - | mov [RA], RC - |.endif - | ins_next - | - |4: // Check for __newindex if previous value is nil. - | cmp dword TAB:RB->metatable, 0 // Shouldn't overwrite RA for fastpath. - | jz <2 - | mov TMP1, RA // Save RA. - | mov TAB:RA, TAB:RB->metatable - | test byte TAB:RA->nomm, 1<<MM_newindex - | jz ->vmeta_tsets // 'no __newindex' flag NOT set: check. - | mov RA, TMP1 // Restore RA. - | jmp <2 - | - |5: // Follow hash chain. - | mov NODE:RA, NODE:RA->next - | test NODE:RA, NODE:RA - | jnz <1 - | // End of hash chain: key not found, add a new one. - | - | // But check for __newindex first. - | mov TAB:RA, TAB:RB->metatable - | test TAB:RA, TAB:RA - | jz >6 // No metatable: continue. - | test byte TAB:RA->nomm, 1<<MM_newindex - | jz ->vmeta_tsets // 'no __newindex' flag NOT set: check. - |6: - | mov TMP1, STR:RC - | mov TMP2, LJ_TSTR - | mov TMP3, TAB:RB // Save TAB:RB for us. - |.if X64 - | mov L:CARG1d, SAVE_L - | mov L:CARG1d->base, BASE - | lea CARG3, TMP1 - | mov CARG2d, TAB:RB - | mov L:RB, L:CARG1d - |.else - | lea RC, TMP1 // Store temp. TValue in TMP1/TMP2. - | mov ARG2, TAB:RB - | mov L:RB, SAVE_L - | mov ARG3, RC - | mov ARG1, L:RB - | mov L:RB->base, BASE - |.endif - | mov SAVE_PC, PC - | call extern lj_tab_newkey // (lua_State *L, GCtab *t, TValue *k) - | // Handles write barrier for the new key. TValue * returned in eax (RC). - | mov BASE, L:RB->base - | mov TAB:RB, TMP3 // Need TAB:RB for barrier. - | mov RA, eax - | jmp <2 // Must check write barrier for value. - | - |7: // Possible table write barrier for the value. Skip valiswhite check. - | barrierback TAB:RB, RC // Destroys STR:RC. - | jmp <3 - break; - case BC_TSETB: - | ins_ABC // RA = src, RB = table, RC = byte literal - | checktab RB, ->vmeta_tsetb - | mov TAB:RB, [BASE+RB*8] - | cmp RC, TAB:RB->asize - | jae ->vmeta_tsetb - | shl RC, 3 - | add RC, TAB:RB->array - | cmp dword [RC+4], LJ_TNIL - | je >3 // Previous value is nil? - |1: - | test byte TAB:RB->marked, LJ_GC_BLACK // isblack(table) - | jnz >7 - |2: // Set array slot. - |.if X64 - | mov RAa, [BASE+RA*8] - | mov [RC], RAa - |.else - | mov RB, [BASE+RA*8+4] - | mov RA, [BASE+RA*8] - | mov [RC+4], RB - | mov [RC], RA - |.endif - | ins_next - | - |3: // Check for __newindex if previous value is nil. - | cmp dword TAB:RB->metatable, 0 // Shouldn't overwrite RA for fastpath. - | jz <1 - | mov TAB:RA, TAB:RB->metatable - | test byte TAB:RA->nomm, 1<<MM_newindex - | jz ->vmeta_tsetb // 'no __newindex' flag NOT set: check. - | movzx RA, PC_RA // Restore RA. - | jmp <1 - | - |7: // Possible table write barrier for the value. Skip valiswhite check. - | barrierback TAB:RB, RA - | movzx RA, PC_RA // Restore RA. - | jmp <2 - break; - case BC_TSETR: - | ins_ABC // RA = src, RB = table, RC = key - | mov TAB:RB, [BASE+RB*8] - |.if DUALNUM - | mov RC, dword [BASE+RC*8] - |.else - | cvttsd2si RC, qword [BASE+RC*8] - |.endif - | test byte TAB:RB->marked, LJ_GC_BLACK // isblack(table) - | jnz >7 - |2: - | cmp RC, TAB:RB->asize - | jae ->vmeta_tsetr - | shl RC, 3 - | add RC, TAB:RB->array - | // Set array slot. - |->BC_TSETR_Z: - |.if X64 - | mov RBa, [BASE+RA*8] - | mov [RC], RBa - |.else - | mov RB, [BASE+RA*8+4] - | mov RA, [BASE+RA*8] - | mov [RC+4], RB - | mov [RC], RA - |.endif - | ins_next - | - |7: // Possible table write barrier for the value. Skip valiswhite check. - | barrierback TAB:RB, RA - | movzx RA, PC_RA // Restore RA. - | jmp <2 - break; - - case BC_TSETM: - | ins_AD // RA = base (table at base-1), RD = num const (start index) - | mov TMP1, KBASE // Need one more free register. - | mov KBASE, dword [KBASE+RD*8] // Integer constant is in lo-word. - |1: - | lea RA, [BASE+RA*8] - | mov TAB:RB, [RA-8] // Guaranteed to be a table. - | test byte TAB:RB->marked, LJ_GC_BLACK // isblack(table) - | jnz >7 - |2: - | mov RD, MULTRES - | sub RD, 1 - | jz >4 // Nothing to copy? - | add RD, KBASE // Compute needed size. - | cmp RD, TAB:RB->asize - | ja >5 // Doesn't fit into array part? - | sub RD, KBASE - | shl KBASE, 3 - | add KBASE, TAB:RB->array - |3: // Copy result slots to table. - |.if X64 - | mov RBa, [RA] - | add RA, 8 - | mov [KBASE], RBa - |.else - | mov RB, [RA] - | mov [KBASE], RB - | mov RB, [RA+4] - | add RA, 8 - | mov [KBASE+4], RB - |.endif - | add KBASE, 8 - | sub RD, 1 - | jnz <3 - |4: - | mov KBASE, TMP1 - | ins_next - | - |5: // Need to resize array part. - |.if X64 - | mov L:CARG1d, SAVE_L - | mov L:CARG1d->base, BASE // Caveat: CARG2d/CARG3d may be BASE. - | mov CARG2d, TAB:RB - | mov CARG3d, RD - | mov L:RB, L:CARG1d - |.else - | mov ARG2, TAB:RB - | mov L:RB, SAVE_L - | mov L:RB->base, BASE - | mov ARG3, RD - | mov ARG1, L:RB - |.endif - | mov SAVE_PC, PC - | call extern lj_tab_reasize // (lua_State *L, GCtab *t, int nasize) - | mov BASE, L:RB->base - | movzx RA, PC_RA // Restore RA. - | jmp <1 // Retry. - | - |7: // Possible table write barrier for any value. Skip valiswhite check. - | barrierback TAB:RB, RD - | jmp <2 - break; - - /* -- Calls and vararg handling ----------------------------------------- */ - - case BC_CALL: case BC_CALLM: - | ins_A_C // RA = base, (RB = nresults+1,) RC = nargs+1 | extra_nargs - if (op == BC_CALLM) { - | add NARGS:RD, MULTRES - } - | cmp dword [BASE+RA*8+4], LJ_TFUNC - | mov LFUNC:RB, [BASE+RA*8] - | jne ->vmeta_call_ra - | lea BASE, [BASE+RA*8+8] - | ins_call - break; - - case BC_CALLMT: - | ins_AD // RA = base, RD = extra_nargs - | add NARGS:RD, MULTRES - | // Fall through. Assumes BC_CALLT follows and ins_AD is a no-op. - break; - case BC_CALLT: - | ins_AD // RA = base, RD = nargs+1 - | lea RA, [BASE+RA*8+8] - | mov KBASE, BASE // Use KBASE for move + vmeta_call hint. - | mov LFUNC:RB, [RA-8] - | cmp dword [RA-4], LJ_TFUNC - | jne ->vmeta_call - |->BC_CALLT_Z: - | mov PC, [BASE-4] - | test PC, FRAME_TYPE - | jnz >7 - |1: - | mov [BASE-8], LFUNC:RB // Copy function down, reloaded below. - | mov MULTRES, NARGS:RD - | sub NARGS:RD, 1 - | jz >3 - |2: // Move args down. - |.if X64 - | mov RBa, [RA] - | add RA, 8 - | mov [KBASE], RBa - |.else - | mov RB, [RA] - | mov [KBASE], RB - | mov RB, [RA+4] - | add RA, 8 - | mov [KBASE+4], RB - |.endif - | add KBASE, 8 - | sub NARGS:RD, 1 - | jnz <2 - | - | mov LFUNC:RB, [BASE-8] - |3: - | mov NARGS:RD, MULTRES - | cmp byte LFUNC:RB->ffid, 1 // (> FF_C) Calling a fast function? - | ja >5 - |4: - | ins_callt - | - |5: // Tailcall to a fast function. - | test PC, FRAME_TYPE // Lua frame below? - | jnz <4 - | movzx RA, PC_RA - | not RAa - | mov LFUNC:KBASE, [BASE+RA*8-8] // Need to prepare KBASE. - | mov KBASE, LFUNC:KBASE->pc - | mov KBASE, [KBASE+PC2PROTO(k)] - | jmp <4 - | - |7: // Tailcall from a vararg function. - | sub PC, FRAME_VARG - | test PC, FRAME_TYPEP - | jnz >8 // Vararg frame below? - | sub BASE, PC // Need to relocate BASE/KBASE down. - | mov KBASE, BASE - | mov PC, [BASE-4] - | jmp <1 - |8: - | add PC, FRAME_VARG - | jmp <1 - break; - - case BC_ITERC: - | ins_A // RA = base, (RB = nresults+1,) RC = nargs+1 (2+1) - | lea RA, [BASE+RA*8+8] // fb = base+1 - |.if X64 - | mov RBa, [RA-24] // Copy state. fb[0] = fb[-3]. - | mov RCa, [RA-16] // Copy control var. fb[1] = fb[-2]. - | mov [RA], RBa - | mov [RA+8], RCa - |.else - | mov RB, [RA-24] // Copy state. fb[0] = fb[-3]. - | mov RC, [RA-20] - | mov [RA], RB - | mov [RA+4], RC - | mov RB, [RA-16] // Copy control var. fb[1] = fb[-2]. - | mov RC, [RA-12] - | mov [RA+8], RB - | mov [RA+12], RC - |.endif - | mov LFUNC:RB, [RA-32] // Copy callable. fb[-1] = fb[-4] - | mov RC, [RA-28] - | mov [RA-8], LFUNC:RB - | mov [RA-4], RC - | cmp RC, LJ_TFUNC // Handle like a regular 2-arg call. - | mov NARGS:RD, 2+1 - | jne ->vmeta_call - | mov BASE, RA - | ins_call - break; - - case BC_ITERN: - | ins_A // RA = base, (RB = nresults+1, RC = nargs+1 (2+1)) - |.if JIT - | // NYI: add hotloop, record BC_ITERN. - |.endif - | mov TMP1, KBASE // Need two more free registers. - | mov TMP2, DISPATCH - | mov TAB:RB, [BASE+RA*8-16] - | mov RC, [BASE+RA*8-8] // Get index from control var. - | mov DISPATCH, TAB:RB->asize - | add PC, 4 - | mov KBASE, TAB:RB->array - |1: // Traverse array part. - | cmp RC, DISPATCH; jae >5 // Index points after array part? - | cmp dword [KBASE+RC*8+4], LJ_TNIL; je >4 - |.if DUALNUM - | mov dword [BASE+RA*8+4], LJ_TISNUM - | mov dword [BASE+RA*8], RC - |.else - | cvtsi2sd xmm0, RC - |.endif - | // Copy array slot to returned value. - |.if X64 - | mov RBa, [KBASE+RC*8] - | mov [BASE+RA*8+8], RBa - |.else - | mov RB, [KBASE+RC*8+4] - | mov [BASE+RA*8+12], RB - | mov RB, [KBASE+RC*8] - | mov [BASE+RA*8+8], RB - |.endif - | add RC, 1 - | // Return array index as a numeric key. - |.if DUALNUM - | // See above. - |.else - | movsd qword [BASE+RA*8], xmm0 - |.endif - | mov [BASE+RA*8-8], RC // Update control var. - |2: - | movzx RD, PC_RD // Get target from ITERL. - | branchPC RD - |3: - | mov DISPATCH, TMP2 - | mov KBASE, TMP1 - | ins_next - | - |4: // Skip holes in array part. - | add RC, 1 - | jmp <1 - | - |5: // Traverse hash part. - | sub RC, DISPATCH - |6: - | cmp RC, TAB:RB->hmask; ja <3 // End of iteration? Branch to ITERL+1. - | imul KBASE, RC, #NODE - | add NODE:KBASE, TAB:RB->node - | cmp dword NODE:KBASE->val.it, LJ_TNIL; je >7 - | lea DISPATCH, [RC+DISPATCH+1] - | // Copy key and value from hash slot. - |.if X64 - | mov RBa, NODE:KBASE->key - | mov RCa, NODE:KBASE->val - | mov [BASE+RA*8], RBa - | mov [BASE+RA*8+8], RCa - |.else - | mov RB, NODE:KBASE->key.gcr - | mov RC, NODE:KBASE->key.it - | mov [BASE+RA*8], RB - | mov [BASE+RA*8+4], RC - | mov RB, NODE:KBASE->val.gcr - | mov RC, NODE:KBASE->val.it - | mov [BASE+RA*8+8], RB - | mov [BASE+RA*8+12], RC - |.endif - | mov [BASE+RA*8-8], DISPATCH - | jmp <2 - | - |7: // Skip holes in hash part. - | add RC, 1 - | jmp <6 - break; - - case BC_ISNEXT: - | ins_AD // RA = base, RD = target (points to ITERN) - | cmp dword [BASE+RA*8-20], LJ_TFUNC; jne >5 - | mov CFUNC:RB, [BASE+RA*8-24] - | cmp dword [BASE+RA*8-12], LJ_TTAB; jne >5 - | cmp dword [BASE+RA*8-4], LJ_TNIL; jne >5 - | cmp byte CFUNC:RB->ffid, FF_next_N; jne >5 - | branchPC RD - | mov dword [BASE+RA*8-8], 0 // Initialize control var. - | mov dword [BASE+RA*8-4], 0xfffe7fff - |1: - | ins_next - |5: // Despecialize bytecode if any of the checks fail. - | mov PC_OP, BC_JMP - | branchPC RD - | mov byte [PC], BC_ITERC - | jmp <1 - break; - - case BC_VARG: - | ins_ABC // RA = base, RB = nresults+1, RC = numparams - | mov TMP1, KBASE // Need one more free register. - | lea KBASE, [BASE+RC*8+(8+FRAME_VARG)] - | lea RA, [BASE+RA*8] - | sub KBASE, [BASE-4] - | // Note: KBASE may now be even _above_ BASE if nargs was < numparams. - | test RB, RB - | jz >5 // Copy all varargs? - | lea RB, [RA+RB*8-8] - | cmp KBASE, BASE // No vararg slots? - | jnb >2 - |1: // Copy vararg slots to destination slots. - |.if X64 - | mov RCa, [KBASE-8] - | add KBASE, 8 - | mov [RA], RCa - |.else - | mov RC, [KBASE-8] - | mov [RA], RC - | mov RC, [KBASE-4] - | add KBASE, 8 - | mov [RA+4], RC - |.endif - | add RA, 8 - | cmp RA, RB // All destination slots filled? - | jnb >3 - | cmp KBASE, BASE // No more vararg slots? - | jb <1 - |2: // Fill up remainder with nil. - | mov dword [RA+4], LJ_TNIL - | add RA, 8 - | cmp RA, RB - | jb <2 - |3: - | mov KBASE, TMP1 - | ins_next - | - |5: // Copy all varargs. - | mov MULTRES, 1 // MULTRES = 0+1 - | mov RC, BASE - | sub RC, KBASE - | jbe <3 // No vararg slots? - | mov RB, RC - | shr RB, 3 - | add RB, 1 - | mov MULTRES, RB // MULTRES = #varargs+1 - | mov L:RB, SAVE_L - | add RC, RA - | cmp RC, L:RB->maxstack - | ja >7 // Need to grow stack? - |6: // Copy all vararg slots. - |.if X64 - | mov RCa, [KBASE-8] - | add KBASE, 8 - | mov [RA], RCa - |.else - | mov RC, [KBASE-8] - | mov [RA], RC - | mov RC, [KBASE-4] - | add KBASE, 8 - | mov [RA+4], RC - |.endif - | add RA, 8 - | cmp KBASE, BASE // No more vararg slots? - | jb <6 - | jmp <3 - | - |7: // Grow stack for varargs. - | mov L:RB->base, BASE - | mov L:RB->top, RA - | mov SAVE_PC, PC - | sub KBASE, BASE // Need delta, because BASE may change. - | mov FCARG2, MULTRES - | sub FCARG2, 1 - | mov FCARG1, L:RB - | call extern lj_state_growstack@8 // (lua_State *L, int n) - | mov BASE, L:RB->base - | mov RA, L:RB->top - | add KBASE, BASE - | jmp <6 - break; - - /* -- Returns ----------------------------------------------------------- */ - - case BC_RETM: - | ins_AD // RA = results, RD = extra_nresults - | add RD, MULTRES // MULTRES >=1, so RD >=1. - | // Fall through. Assumes BC_RET follows and ins_AD is a no-op. - break; - - case BC_RET: case BC_RET0: case BC_RET1: - | ins_AD // RA = results, RD = nresults+1 - if (op != BC_RET0) { - | shl RA, 3 - } - |1: - | mov PC, [BASE-4] - | mov MULTRES, RD // Save nresults+1. - | test PC, FRAME_TYPE // Check frame type marker. - | jnz >7 // Not returning to a fixarg Lua func? - switch (op) { - case BC_RET: - |->BC_RET_Z: - | mov KBASE, BASE // Use KBASE for result move. - | sub RD, 1 - | jz >3 - |2: // Move results down. - |.if X64 - | mov RBa, [KBASE+RA] - | mov [KBASE-8], RBa - |.else - | mov RB, [KBASE+RA] - | mov [KBASE-8], RB - | mov RB, [KBASE+RA+4] - | mov [KBASE-4], RB - |.endif - | add KBASE, 8 - | sub RD, 1 - | jnz <2 - |3: - | mov RD, MULTRES // Note: MULTRES may be >255. - | movzx RB, PC_RB // So cannot compare with RDL! - |5: - | cmp RB, RD // More results expected? - | ja >6 - break; - case BC_RET1: - |.if X64 - | mov RBa, [BASE+RA] - | mov [BASE-8], RBa - |.else - | mov RB, [BASE+RA+4] - | mov [BASE-4], RB - | mov RB, [BASE+RA] - | mov [BASE-8], RB - |.endif - /* fallthrough */ - case BC_RET0: - |5: - | cmp PC_RB, RDL // More results expected? - | ja >6 - default: - break; - } - | movzx RA, PC_RA - | not RAa // Note: ~RA = -(RA+1) - | lea BASE, [BASE+RA*8] // base = base - (RA+1)*8 - | mov LFUNC:KBASE, [BASE-8] - | mov KBASE, LFUNC:KBASE->pc - | mov KBASE, [KBASE+PC2PROTO(k)] - | ins_next - | - |6: // Fill up results with nil. - if (op == BC_RET) { - | mov dword [KBASE-4], LJ_TNIL // Note: relies on shifted base. - | add KBASE, 8 - } else { - | mov dword [BASE+RD*8-12], LJ_TNIL - } - | add RD, 1 - | jmp <5 - | - |7: // Non-standard return case. - | lea RB, [PC-FRAME_VARG] - | test RB, FRAME_TYPEP - | jnz ->vm_return - | // Return from vararg function: relocate BASE down and RA up. - | sub BASE, RB - if (op != BC_RET0) { - | add RA, RB - } - | jmp <1 - break; - - /* -- Loops and branches ------------------------------------------------ */ - - |.define FOR_IDX, [RA]; .define FOR_TIDX, dword [RA+4] - |.define FOR_STOP, [RA+8]; .define FOR_TSTOP, dword [RA+12] - |.define FOR_STEP, [RA+16]; .define FOR_TSTEP, dword [RA+20] - |.define FOR_EXT, [RA+24]; .define FOR_TEXT, dword [RA+28] - - case BC_FORL: - |.if JIT - | hotloop RB - |.endif - | // Fall through. Assumes BC_IFORL follows and ins_AJ is a no-op. - break; - - case BC_JFORI: - case BC_JFORL: -#if !LJ_HASJIT - break; -#endif - case BC_FORI: - case BC_IFORL: - vk = (op == BC_IFORL || op == BC_JFORL); - | ins_AJ // RA = base, RD = target (after end of loop or start of loop) - | lea RA, [BASE+RA*8] - if (LJ_DUALNUM) { - | cmp FOR_TIDX, LJ_TISNUM; jne >9 - if (!vk) { - | cmp FOR_TSTOP, LJ_TISNUM; jne ->vmeta_for - | cmp FOR_TSTEP, LJ_TISNUM; jne ->vmeta_for - | mov RB, dword FOR_IDX - | cmp dword FOR_STEP, 0; jl >5 - } else { -#ifdef LUA_USE_ASSERT - | cmp FOR_TSTOP, LJ_TISNUM; jne ->assert_bad_for_arg_type - | cmp FOR_TSTEP, LJ_TISNUM; jne ->assert_bad_for_arg_type -#endif - | mov RB, dword FOR_STEP - | test RB, RB; js >5 - | add RB, dword FOR_IDX; jo >1 - | mov dword FOR_IDX, RB - } - | cmp RB, dword FOR_STOP - | mov FOR_TEXT, LJ_TISNUM - | mov dword FOR_EXT, RB - if (op == BC_FORI) { - | jle >7 - |1: - |6: - | branchPC RD - } else if (op == BC_JFORI) { - | branchPC RD - | movzx RD, PC_RD - | jle =>BC_JLOOP - |1: - |6: - } else if (op == BC_IFORL) { - | jg >7 - |6: - | branchPC RD - |1: - } else { - | jle =>BC_JLOOP - |1: - |6: - } - |7: - | ins_next - | - |5: // Invert check for negative step. - if (vk) { - | add RB, dword FOR_IDX; jo <1 - | mov dword FOR_IDX, RB - } - | cmp RB, dword FOR_STOP - | mov FOR_TEXT, LJ_TISNUM - | mov dword FOR_EXT, RB - if (op == BC_FORI) { - | jge <7 - } else if (op == BC_JFORI) { - | branchPC RD - | movzx RD, PC_RD - | jge =>BC_JLOOP - } else if (op == BC_IFORL) { - | jl <7 - } else { - | jge =>BC_JLOOP - } - | jmp <6 - |9: // Fallback to FP variant. - } else if (!vk) { - | cmp FOR_TIDX, LJ_TISNUM - } - if (!vk) { - | jae ->vmeta_for - | cmp FOR_TSTOP, LJ_TISNUM; jae ->vmeta_for - } else { -#ifdef LUA_USE_ASSERT - | cmp FOR_TSTOP, LJ_TISNUM; jae ->assert_bad_for_arg_type - | cmp FOR_TSTEP, LJ_TISNUM; jae ->assert_bad_for_arg_type -#endif - } - | mov RB, FOR_TSTEP // Load type/hiword of for step. - if (!vk) { - | cmp RB, LJ_TISNUM; jae ->vmeta_for - } - | movsd xmm0, qword FOR_IDX - | movsd xmm1, qword FOR_STOP - if (vk) { - | addsd xmm0, qword FOR_STEP - | movsd qword FOR_IDX, xmm0 - | test RB, RB; js >3 - } else { - | jl >3 - } - | ucomisd xmm1, xmm0 - |1: - | movsd qword FOR_EXT, xmm0 - if (op == BC_FORI) { - |.if DUALNUM - | jnb <7 - |.else - | jnb >2 - | branchPC RD - |.endif - } else if (op == BC_JFORI) { - | branchPC RD - | movzx RD, PC_RD - | jnb =>BC_JLOOP - } else if (op == BC_IFORL) { - |.if DUALNUM - | jb <7 - |.else - | jb >2 - | branchPC RD - |.endif - } else { - | jnb =>BC_JLOOP - } - |.if DUALNUM - | jmp <6 - |.else - |2: - | ins_next - |.endif - | - |3: // Invert comparison if step is negative. - | ucomisd xmm0, xmm1 - | jmp <1 - break; - - case BC_ITERL: - |.if JIT - | hotloop RB - |.endif - | // Fall through. Assumes BC_IITERL follows and ins_AJ is a no-op. - break; - - case BC_JITERL: -#if !LJ_HASJIT - break; -#endif - case BC_IITERL: - | ins_AJ // RA = base, RD = target - | lea RA, [BASE+RA*8] - | mov RB, [RA+4] - | cmp RB, LJ_TNIL; je >1 // Stop if iterator returned nil. - if (op == BC_JITERL) { - | mov [RA-4], RB - | mov RB, [RA] - | mov [RA-8], RB - | jmp =>BC_JLOOP - } else { - | branchPC RD // Otherwise save control var + branch. - | mov RD, [RA] - | mov [RA-4], RB - | mov [RA-8], RD - } - |1: - | ins_next - break; - - case BC_LOOP: - | ins_A // RA = base, RD = target (loop extent) - | // Note: RA/RD is only used by trace recorder to determine scope/extent - | // This opcode does NOT jump, it's only purpose is to detect a hot loop. - |.if JIT - | hotloop RB - |.endif - | // Fall through. Assumes BC_ILOOP follows and ins_A is a no-op. - break; - - case BC_ILOOP: - | ins_A // RA = base, RD = target (loop extent) - | ins_next - break; - - case BC_JLOOP: - |.if JIT - | ins_AD // RA = base (ignored), RD = traceno - | mov RA, [DISPATCH+DISPATCH_J(trace)] - | mov TRACE:RD, [RA+RD*4] - | mov RDa, TRACE:RD->mcode - | mov L:RB, SAVE_L - | mov [DISPATCH+DISPATCH_GL(jit_base)], BASE - | mov [DISPATCH+DISPATCH_GL(tmpbuf.L)], L:RB - | // Save additional callee-save registers only used in compiled code. - |.if X64WIN - | mov TMPQ, r12 - | mov TMPa, r13 - | mov CSAVE_4, r14 - | mov CSAVE_3, r15 - | mov RAa, rsp - | sub rsp, 9*16+4*8 - | movdqa [RAa], xmm6 - | movdqa [RAa-1*16], xmm7 - | movdqa [RAa-2*16], xmm8 - | movdqa [RAa-3*16], xmm9 - | movdqa [RAa-4*16], xmm10 - | movdqa [RAa-5*16], xmm11 - | movdqa [RAa-6*16], xmm12 - | movdqa [RAa-7*16], xmm13 - | movdqa [RAa-8*16], xmm14 - | movdqa [RAa-9*16], xmm15 - |.elif X64 - | mov TMPQ, r12 - | mov TMPa, r13 - | sub rsp, 16 - |.endif - | jmp RDa - |.endif - break; - - case BC_JMP: - | ins_AJ // RA = unused, RD = target - | branchPC RD - | ins_next - break; - - /* -- Function headers -------------------------------------------------- */ - - /* - ** Reminder: A function may be called with func/args above L->maxstack, - ** i.e. occupying EXTRA_STACK slots. And vmeta_call may add one extra slot, - ** too. This means all FUNC* ops (including fast functions) must check - ** for stack overflow _before_ adding more slots! - */ - - case BC_FUNCF: - |.if JIT - | hotcall RB - |.endif - case BC_FUNCV: /* NYI: compiled vararg functions. */ - | // Fall through. Assumes BC_IFUNCF/BC_IFUNCV follow and ins_AD is a no-op. - break; - - case BC_JFUNCF: -#if !LJ_HASJIT - break; -#endif - case BC_IFUNCF: - | ins_AD // BASE = new base, RA = framesize, RD = nargs+1 - | mov KBASE, [PC-4+PC2PROTO(k)] - | mov L:RB, SAVE_L - | lea RA, [BASE+RA*8] // Top of frame. - | cmp RA, L:RB->maxstack - | ja ->vm_growstack_f - | movzx RA, byte [PC-4+PC2PROTO(numparams)] - | cmp NARGS:RD, RA // Check for missing parameters. - | jbe >3 - |2: - if (op == BC_JFUNCF) { - | movzx RD, PC_RD - | jmp =>BC_JLOOP - } else { - | ins_next - } - | - |3: // Clear missing parameters. - | mov dword [BASE+NARGS:RD*8-4], LJ_TNIL - | add NARGS:RD, 1 - | cmp NARGS:RD, RA - | jbe <3 - | jmp <2 - break; - - case BC_JFUNCV: -#if !LJ_HASJIT - break; -#endif - | int3 // NYI: compiled vararg functions - break; /* NYI: compiled vararg functions. */ - - case BC_IFUNCV: - | ins_AD // BASE = new base, RA = framesize, RD = nargs+1 - | lea RB, [NARGS:RD*8+FRAME_VARG] - | lea RD, [BASE+NARGS:RD*8] - | mov LFUNC:KBASE, [BASE-8] - | mov [RD-4], RB // Store delta + FRAME_VARG. - | mov [RD-8], LFUNC:KBASE // Store copy of LFUNC. - | mov L:RB, SAVE_L - | lea RA, [RD+RA*8] - | cmp RA, L:RB->maxstack - | ja ->vm_growstack_v // Need to grow stack. - | mov RA, BASE - | mov BASE, RD - | movzx RB, byte [PC-4+PC2PROTO(numparams)] - | test RB, RB - | jz >2 - |1: // Copy fixarg slots up to new frame. - | add RA, 8 - | cmp RA, BASE - | jnb >3 // Less args than parameters? - | mov KBASE, [RA-8] - | mov [RD], KBASE - | mov KBASE, [RA-4] - | mov [RD+4], KBASE - | add RD, 8 - | mov dword [RA-4], LJ_TNIL // Clear old fixarg slot (help the GC). - | sub RB, 1 - | jnz <1 - |2: - if (op == BC_JFUNCV) { - | movzx RD, PC_RD - | jmp =>BC_JLOOP - } else { - | mov KBASE, [PC-4+PC2PROTO(k)] - | ins_next - } - | - |3: // Clear missing parameters. - | mov dword [RD+4], LJ_TNIL - | add RD, 8 - | sub RB, 1 - | jnz <3 - | jmp <2 - break; - - case BC_FUNCC: - case BC_FUNCCW: - | ins_AD // BASE = new base, RA = ins RA|RD (unused), RD = nargs+1 - | mov CFUNC:RB, [BASE-8] - | mov KBASEa, CFUNC:RB->f - | mov L:RB, SAVE_L - | lea RD, [BASE+NARGS:RD*8-8] - | mov L:RB->base, BASE - | lea RA, [RD+8*LUA_MINSTACK] - | cmp RA, L:RB->maxstack - | mov L:RB->top, RD - if (op == BC_FUNCC) { - |.if X64 - | mov CARG1d, L:RB // Caveat: CARG1d may be RA. - |.else - | mov ARG1, L:RB - |.endif - } else { - |.if X64 - | mov CARG2, KBASEa - | mov CARG1d, L:RB // Caveat: CARG1d may be RA. - |.else - | mov ARG2, KBASEa - | mov ARG1, L:RB - |.endif - } - | ja ->vm_growstack_c // Need to grow stack. - | set_vmstate C - if (op == BC_FUNCC) { - | call KBASEa // (lua_State *L) - } else { - | // (lua_State *L, lua_CFunction f) - | call aword [DISPATCH+DISPATCH_GL(wrapf)] - } - | // nresults returned in eax (RD). - | mov BASE, L:RB->base - | mov [DISPATCH+DISPATCH_GL(cur_L)], L:RB - | set_vmstate INTERP - | lea RA, [BASE+RD*8] - | neg RA - | add RA, L:RB->top // RA = (L->top-(L->base+nresults))*8 - | mov PC, [BASE-4] // Fetch PC of caller. - | jmp ->vm_returnc - break; - - /* ---------------------------------------------------------------------- */ - - default: - fprintf(stderr, "Error: undefined opcode BC_%s\n", bc_names[op]); - exit(2); - break; - } -} - -static int build_backend(BuildCtx *ctx) -{ - int op; - dasm_growpc(Dst, BC__MAX); - build_subroutines(ctx); - |.code_op - for (op = 0; op < BC__MAX; op++) - build_ins(ctx, (BCOp)op, op); - return BC__MAX; -} - -/* Emit pseudo frame-info for all assembler functions. */ -static void emit_asm_debug(BuildCtx *ctx) -{ - int fcofs = (int)((uint8_t *)ctx->glob[GLOB_vm_ffi_call] - ctx->code); -#if LJ_64 -#define SZPTR "8" -#define BSZPTR "3" -#define REG_SP "0x7" -#define REG_RA "0x10" -#else -#define SZPTR "4" -#define BSZPTR "2" -#define REG_SP "0x4" -#define REG_RA "0x8" -#endif - switch (ctx->mode) { - case BUILD_elfasm: - fprintf(ctx->fp, "\t.section .debug_frame,\"\",@progbits\n"); - fprintf(ctx->fp, - ".Lframe0:\n" - "\t.long .LECIE0-.LSCIE0\n" - ".LSCIE0:\n" - "\t.long 0xffffffff\n" - "\t.byte 0x1\n" - "\t.string \"\"\n" - "\t.uleb128 0x1\n" - "\t.sleb128 -" SZPTR "\n" - "\t.byte " REG_RA "\n" - "\t.byte 0xc\n\t.uleb128 " REG_SP "\n\t.uleb128 " SZPTR "\n" - "\t.byte 0x80+" REG_RA "\n\t.uleb128 0x1\n" - "\t.align " SZPTR "\n" - ".LECIE0:\n\n"); - fprintf(ctx->fp, - ".LSFDE0:\n" - "\t.long .LEFDE0-.LASFDE0\n" - ".LASFDE0:\n" - "\t.long .Lframe0\n" -#if LJ_64 - "\t.quad .Lbegin\n" - "\t.quad %d\n" - "\t.byte 0xe\n\t.uleb128 %d\n" /* def_cfa_offset */ - "\t.byte 0x86\n\t.uleb128 0x2\n" /* offset rbp */ - "\t.byte 0x83\n\t.uleb128 0x3\n" /* offset rbx */ - "\t.byte 0x8f\n\t.uleb128 0x4\n" /* offset r15 */ - "\t.byte 0x8e\n\t.uleb128 0x5\n" /* offset r14 */ -#if LJ_NO_UNWIND - "\t.byte 0x8d\n\t.uleb128 0x6\n" /* offset r13 */ - "\t.byte 0x8c\n\t.uleb128 0x7\n" /* offset r12 */ -#endif -#else - "\t.long .Lbegin\n" - "\t.long %d\n" - "\t.byte 0xe\n\t.uleb128 %d\n" /* def_cfa_offset */ - "\t.byte 0x85\n\t.uleb128 0x2\n" /* offset ebp */ - "\t.byte 0x87\n\t.uleb128 0x3\n" /* offset edi */ - "\t.byte 0x86\n\t.uleb128 0x4\n" /* offset esi */ - "\t.byte 0x83\n\t.uleb128 0x5\n" /* offset ebx */ -#endif - "\t.align " SZPTR "\n" - ".LEFDE0:\n\n", fcofs, CFRAME_SIZE); -#if LJ_HASFFI - fprintf(ctx->fp, - ".LSFDE1:\n" - "\t.long .LEFDE1-.LASFDE1\n" - ".LASFDE1:\n" - "\t.long .Lframe0\n" -#if LJ_64 - "\t.quad lj_vm_ffi_call\n" - "\t.quad %d\n" - "\t.byte 0xe\n\t.uleb128 16\n" /* def_cfa_offset */ - "\t.byte 0x86\n\t.uleb128 0x2\n" /* offset rbp */ - "\t.byte 0xd\n\t.uleb128 0x6\n" /* def_cfa_register rbp */ - "\t.byte 0x83\n\t.uleb128 0x3\n" /* offset rbx */ -#else - "\t.long lj_vm_ffi_call\n" - "\t.long %d\n" - "\t.byte 0xe\n\t.uleb128 8\n" /* def_cfa_offset */ - "\t.byte 0x85\n\t.uleb128 0x2\n" /* offset ebp */ - "\t.byte 0xd\n\t.uleb128 0x5\n" /* def_cfa_register ebp */ - "\t.byte 0x83\n\t.uleb128 0x3\n" /* offset ebx */ -#endif - "\t.align " SZPTR "\n" - ".LEFDE1:\n\n", (int)ctx->codesz - fcofs); -#endif -#if !LJ_NO_UNWIND -#if (defined(__sun__) && defined(__svr4__)) -#if LJ_64 - fprintf(ctx->fp, "\t.section .eh_frame,\"a\",@unwind\n"); -#else - fprintf(ctx->fp, "\t.section .eh_frame,\"aw\",@progbits\n"); -#endif -#else - fprintf(ctx->fp, "\t.section .eh_frame,\"a\",@progbits\n"); -#endif - fprintf(ctx->fp, - ".Lframe1:\n" - "\t.long .LECIE1-.LSCIE1\n" - ".LSCIE1:\n" - "\t.long 0\n" - "\t.byte 0x1\n" - "\t.string \"zPR\"\n" - "\t.uleb128 0x1\n" - "\t.sleb128 -" SZPTR "\n" - "\t.byte " REG_RA "\n" - "\t.uleb128 6\n" /* augmentation length */ - "\t.byte 0x1b\n" /* pcrel|sdata4 */ - "\t.long lj_err_unwind_dwarf-.\n" - "\t.byte 0x1b\n" /* pcrel|sdata4 */ - "\t.byte 0xc\n\t.uleb128 " REG_SP "\n\t.uleb128 " SZPTR "\n" - "\t.byte 0x80+" REG_RA "\n\t.uleb128 0x1\n" - "\t.align " SZPTR "\n" - ".LECIE1:\n\n"); - fprintf(ctx->fp, - ".LSFDE2:\n" - "\t.long .LEFDE2-.LASFDE2\n" - ".LASFDE2:\n" - "\t.long .LASFDE2-.Lframe1\n" - "\t.long .Lbegin-.\n" - "\t.long %d\n" - "\t.uleb128 0\n" /* augmentation length */ - "\t.byte 0xe\n\t.uleb128 %d\n" /* def_cfa_offset */ -#if LJ_64 - "\t.byte 0x86\n\t.uleb128 0x2\n" /* offset rbp */ - "\t.byte 0x83\n\t.uleb128 0x3\n" /* offset rbx */ - "\t.byte 0x8f\n\t.uleb128 0x4\n" /* offset r15 */ - "\t.byte 0x8e\n\t.uleb128 0x5\n" /* offset r14 */ -#else - "\t.byte 0x85\n\t.uleb128 0x2\n" /* offset ebp */ - "\t.byte 0x87\n\t.uleb128 0x3\n" /* offset edi */ - "\t.byte 0x86\n\t.uleb128 0x4\n" /* offset esi */ - "\t.byte 0x83\n\t.uleb128 0x5\n" /* offset ebx */ -#endif - "\t.align " SZPTR "\n" - ".LEFDE2:\n\n", fcofs, CFRAME_SIZE); -#if LJ_HASFFI - fprintf(ctx->fp, - ".Lframe2:\n" - "\t.long .LECIE2-.LSCIE2\n" - ".LSCIE2:\n" - "\t.long 0\n" - "\t.byte 0x1\n" - "\t.string \"zR\"\n" - "\t.uleb128 0x1\n" - "\t.sleb128 -" SZPTR "\n" - "\t.byte " REG_RA "\n" - "\t.uleb128 1\n" /* augmentation length */ - "\t.byte 0x1b\n" /* pcrel|sdata4 */ - "\t.byte 0xc\n\t.uleb128 " REG_SP "\n\t.uleb128 " SZPTR "\n" - "\t.byte 0x80+" REG_RA "\n\t.uleb128 0x1\n" - "\t.align " SZPTR "\n" - ".LECIE2:\n\n"); - fprintf(ctx->fp, - ".LSFDE3:\n" - "\t.long .LEFDE3-.LASFDE3\n" - ".LASFDE3:\n" - "\t.long .LASFDE3-.Lframe2\n" - "\t.long lj_vm_ffi_call-.\n" - "\t.long %d\n" - "\t.uleb128 0\n" /* augmentation length */ -#if LJ_64 - "\t.byte 0xe\n\t.uleb128 16\n" /* def_cfa_offset */ - "\t.byte 0x86\n\t.uleb128 0x2\n" /* offset rbp */ - "\t.byte 0xd\n\t.uleb128 0x6\n" /* def_cfa_register rbp */ - "\t.byte 0x83\n\t.uleb128 0x3\n" /* offset rbx */ -#else - "\t.byte 0xe\n\t.uleb128 8\n" /* def_cfa_offset */ - "\t.byte 0x85\n\t.uleb128 0x2\n" /* offset ebp */ - "\t.byte 0xd\n\t.uleb128 0x5\n" /* def_cfa_register ebp */ - "\t.byte 0x83\n\t.uleb128 0x3\n" /* offset ebx */ -#endif - "\t.align " SZPTR "\n" - ".LEFDE3:\n\n", (int)ctx->codesz - fcofs); -#endif -#endif - break; -#if !LJ_NO_UNWIND - /* Mental note: never let Apple design an assembler. - ** Or a linker. Or a plastic case. But I digress. - */ - case BUILD_machasm: { -#if LJ_HASFFI - int fcsize = 0; -#endif - int i; - fprintf(ctx->fp, "\t.section __TEXT,__eh_frame,coalesced,no_toc+strip_static_syms+live_support\n"); - fprintf(ctx->fp, - "EH_frame1:\n" - "\t.set L$set$x,LECIEX-LSCIEX\n" - "\t.long L$set$x\n" - "LSCIEX:\n" - "\t.long 0\n" - "\t.byte 0x1\n" - "\t.ascii \"zPR\\0\"\n" - "\t.byte 0x1\n" - "\t.byte 128-" SZPTR "\n" - "\t.byte " REG_RA "\n" - "\t.byte 6\n" /* augmentation length */ - "\t.byte 0x9b\n" /* indirect|pcrel|sdata4 */ -#if LJ_64 - "\t.long _lj_err_unwind_dwarf+4@GOTPCREL\n" - "\t.byte 0x1b\n" /* pcrel|sdata4 */ - "\t.byte 0xc\n\t.byte " REG_SP "\n\t.byte " SZPTR "\n" -#else - "\t.long L_lj_err_unwind_dwarf$non_lazy_ptr-.\n" - "\t.byte 0x1b\n" /* pcrel|sdata4 */ - "\t.byte 0xc\n\t.byte 0x5\n\t.byte 0x4\n" /* esp=5 on 32 bit MACH-O. */ -#endif - "\t.byte 0x80+" REG_RA "\n\t.byte 0x1\n" - "\t.align " BSZPTR "\n" - "LECIEX:\n\n"); - for (i = 0; i < ctx->nsym; i++) { - const char *name = ctx->sym[i].name; - int32_t size = ctx->sym[i+1].ofs - ctx->sym[i].ofs; - if (size == 0) continue; -#if LJ_HASFFI - if (!strcmp(name, "_lj_vm_ffi_call")) { fcsize = size; continue; } -#endif - fprintf(ctx->fp, - "%s.eh:\n" - "LSFDE%d:\n" - "\t.set L$set$%d,LEFDE%d-LASFDE%d\n" - "\t.long L$set$%d\n" - "LASFDE%d:\n" - "\t.long LASFDE%d-EH_frame1\n" - "\t.long %s-.\n" - "\t.long %d\n" - "\t.byte 0\n" /* augmentation length */ - "\t.byte 0xe\n\t.byte %d\n" /* def_cfa_offset */ -#if LJ_64 - "\t.byte 0x86\n\t.byte 0x2\n" /* offset rbp */ - "\t.byte 0x83\n\t.byte 0x3\n" /* offset rbx */ - "\t.byte 0x8f\n\t.byte 0x4\n" /* offset r15 */ - "\t.byte 0x8e\n\t.byte 0x5\n" /* offset r14 */ -#else - "\t.byte 0x84\n\t.byte 0x2\n" /* offset ebp (4 for MACH-O)*/ - "\t.byte 0x87\n\t.byte 0x3\n" /* offset edi */ - "\t.byte 0x86\n\t.byte 0x4\n" /* offset esi */ - "\t.byte 0x83\n\t.byte 0x5\n" /* offset ebx */ -#endif - "\t.align " BSZPTR "\n" - "LEFDE%d:\n\n", - name, i, i, i, i, i, i, i, name, size, CFRAME_SIZE, i); - } -#if LJ_HASFFI - if (fcsize) { - fprintf(ctx->fp, - "EH_frame2:\n" - "\t.set L$set$y,LECIEY-LSCIEY\n" - "\t.long L$set$y\n" - "LSCIEY:\n" - "\t.long 0\n" - "\t.byte 0x1\n" - "\t.ascii \"zR\\0\"\n" - "\t.byte 0x1\n" - "\t.byte 128-" SZPTR "\n" - "\t.byte " REG_RA "\n" - "\t.byte 1\n" /* augmentation length */ -#if LJ_64 - "\t.byte 0x1b\n" /* pcrel|sdata4 */ - "\t.byte 0xc\n\t.byte " REG_SP "\n\t.byte " SZPTR "\n" -#else - "\t.byte 0x1b\n" /* pcrel|sdata4 */ - "\t.byte 0xc\n\t.byte 0x5\n\t.byte 0x4\n" /* esp=5 on 32 bit MACH. */ -#endif - "\t.byte 0x80+" REG_RA "\n\t.byte 0x1\n" - "\t.align " BSZPTR "\n" - "LECIEY:\n\n"); - fprintf(ctx->fp, - "_lj_vm_ffi_call.eh:\n" - "LSFDEY:\n" - "\t.set L$set$yy,LEFDEY-LASFDEY\n" - "\t.long L$set$yy\n" - "LASFDEY:\n" - "\t.long LASFDEY-EH_frame2\n" - "\t.long _lj_vm_ffi_call-.\n" - "\t.long %d\n" - "\t.byte 0\n" /* augmentation length */ -#if LJ_64 - "\t.byte 0xe\n\t.byte 16\n" /* def_cfa_offset */ - "\t.byte 0x86\n\t.byte 0x2\n" /* offset rbp */ - "\t.byte 0xd\n\t.byte 0x6\n" /* def_cfa_register rbp */ - "\t.byte 0x83\n\t.byte 0x3\n" /* offset rbx */ -#else - "\t.byte 0xe\n\t.byte 8\n" /* def_cfa_offset */ - "\t.byte 0x84\n\t.byte 0x2\n" /* offset ebp (4 for MACH-O)*/ - "\t.byte 0xd\n\t.byte 0x4\n" /* def_cfa_register ebp */ - "\t.byte 0x83\n\t.byte 0x3\n" /* offset ebx */ -#endif - "\t.align " BSZPTR "\n" - "LEFDEY:\n\n", fcsize); - } -#endif -#if !LJ_64 - fprintf(ctx->fp, - "\t.non_lazy_symbol_pointer\n" - "L_lj_err_unwind_dwarf$non_lazy_ptr:\n" - ".indirect_symbol _lj_err_unwind_dwarf\n" - ".long 0\n\n"); - fprintf(ctx->fp, "\t.section __IMPORT,__jump_table,symbol_stubs,pure_instructions+self_modifying_code,5\n"); - { - const char *const *xn; - for (xn = ctx->extnames; *xn; xn++) - if (strncmp(*xn, LABEL_PREFIX, sizeof(LABEL_PREFIX)-1)) - fprintf(ctx->fp, "L_%s$stub:\n\t.indirect_symbol _%s\n\t.ascii \"\\364\\364\\364\\364\\364\"\n", *xn, *xn); - } -#endif - fprintf(ctx->fp, ".subsections_via_symbols\n"); - } - break; -#endif - default: /* Difficult for other modes. */ - break; - } -} - |