diff options
Diffstat (limited to 'deps/LuaJIT/src/vm_x64.dasc')
| -rw-r--r-- | deps/LuaJIT/src/vm_x64.dasc | 4909 |
1 files changed, 0 insertions, 4909 deletions
diff --git a/deps/LuaJIT/src/vm_x64.dasc b/deps/LuaJIT/src/vm_x64.dasc deleted file mode 100644 index a003fb4..0000000 --- a/deps/LuaJIT/src/vm_x64.dasc +++ /dev/null @@ -1,4909 +0,0 @@ -|// Low-level VM code for x64 CPUs in LJ_GC64 mode. -|// Bytecode interpreter, fast functions and helper functions. -|// Copyright (C) 2005-2017 Mike Pall. See Copyright Notice in luajit.h -| -|.arch x64 -|.section code_op, code_sub -| -|.actionlist build_actionlist -|.globals GLOB_ -|.globalnames globnames -|.externnames extnames -| -|//----------------------------------------------------------------------- -| -|.if WIN -|.define X64WIN, 1 // Windows/x64 calling conventions. -|.endif -| -|// Fixed register assignments for the interpreter. -|// This is very fragile and has many dependencies. Caveat emptor. -|.define BASE, rdx // Not C callee-save, refetched anyway. -|.if X64WIN -|.define KBASE, rdi // Must be C callee-save. -|.define PC, rsi // Must be C callee-save. -|.define DISPATCH, rbx // Must be C callee-save. -|.define KBASEd, edi -|.define PCd, esi -|.define DISPATCHd, ebx -|.else -|.define KBASE, r15 // Must be C callee-save. -|.define PC, rbx // Must be C callee-save. -|.define DISPATCH, r14 // Must be C callee-save. -|.define KBASEd, r15d -|.define PCd, ebx -|.define DISPATCHd, r14d -|.endif -| -|.define RA, rcx -|.define RAd, ecx -|.define RAH, ch -|.define RAL, cl -|.define RB, rbp // Must be rbp (C callee-save). -|.define RBd, ebp -|.define RC, rax // Must be rax. -|.define RCd, eax -|.define RCW, ax -|.define RCH, ah -|.define RCL, al -|.define OP, RBd -|.define RD, RC -|.define RDd, RCd -|.define RDW, RCW -|.define RDL, RCL -|.define TMPR, r10 -|.define TMPRd, r10d -|.define ITYPE, r11 -|.define ITYPEd, r11d -| -|.if 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 -|.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 -|.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 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, aword [rsp+aword*12] -|.define SAVE_L, aword [rsp+aword*11] -|.define SAVE_ERRF, dword [rsp+dword*21] -|.define SAVE_NRES, 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 -| -|.define ARG5d, dword [rsp+dword*8] -|.define TMP1, ARG5 // TMP1 overlaps ARG5 -|.define TMP1d, ARG5d -|.define TMP1hi, dword [rsp+dword*9] -|.define MULTRES, TMP1d // MULTRES overlaps TMP1d. -| -|//----------------------------------------------------------------------- -|.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, aword [rsp+aword*3] -|.define SAVE_L, aword [rsp+aword*2] -|.define SAVE_ERRF, dword [rsp+dword*3] -|.define SAVE_NRES, dword [rsp+dword*2] -|.define TMP1, aword [rsp] //<-- rsp while in interpreter. -|//----- 16 byte aligned -| -|.define TMP1d, dword [rsp] -|.define TMP1hi, dword [rsp+dword*1] -|.define MULTRES, TMP1d // MULTRES overlaps TMP1d. -| -|.endif -| -|//----------------------------------------------------------------------- -| -|// Instruction headers. -|.macro ins_A; .endmacro -|.macro ins_AD; .endmacro -|.macro ins_AJ; .endmacro -|.macro ins_ABC; movzx RBd, RCH; movzx RCd, RCL; .endmacro -|.macro ins_AB_; movzx RBd, RCH; .endmacro -|.macro ins_A_C; movzx RCd, RCL; .endmacro -|.macro ins_AND; not RD; .endmacro -| -|// Instruction decode+dispatch. Carefully tuned (nope, lodsd is not faster). -|.macro ins_NEXT -| mov RCd, [PC] -| movzx RAd, RCH -| movzx OP, RCL -| add PC, 4 -| shr RCd, 16 -| jmp aword [DISPATCH+OP*8] -|.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-8] = PC -| mov PC, LFUNC:RB->pc -| mov RAd, [PC] -| movzx OP, RAL -| movzx RAd, RAH -| add PC, 4 -| jmp aword [DISPATCH+OP*8] -|.endmacro -| -|.macro ins_call -| // BASE = new base, RB = LFUNC, RD = nargs+1 -| mov [BASE-8], PC -| ins_callt -|.endmacro -| -|//----------------------------------------------------------------------- -| -|// Macros to clear or set tags. -|.macro cleartp, reg; shl reg, 17; shr reg, 17; .endmacro -|.macro settp, reg, tp -| mov64 ITYPE, ((uint64_t)tp<<47) -| or reg, ITYPE -|.endmacro -|.macro settp, dst, reg, tp -| mov64 dst, ((uint64_t)tp<<47) -| or dst, reg -|.endmacro -|.macro setint, reg -| settp reg, LJ_TISNUM -|.endmacro -|.macro setint, dst, reg -| settp dst, reg, LJ_TISNUM -|.endmacro -| -|// Macros to test operand types. -|.macro checktp_nc, reg, tp, target -| mov ITYPE, reg -| sar ITYPE, 47 -| cmp ITYPEd, tp -| jne target -|.endmacro -|.macro checktp, reg, tp, target -| mov ITYPE, reg -| cleartp reg -| sar ITYPE, 47 -| cmp ITYPEd, tp -| jne target -|.endmacro -|.macro checktptp, src, tp, target -| mov ITYPE, src -| sar ITYPE, 47 -| cmp ITYPEd, tp -| jne target -|.endmacro -|.macro checkstr, reg, target; checktp reg, LJ_TSTR, target; .endmacro -|.macro checktab, reg, target; checktp reg, LJ_TTAB, target; .endmacro -|.macro checkfunc, reg, target; checktp reg, LJ_TFUNC, target; .endmacro -| -|.macro checknumx, reg, target, jump -| mov ITYPE, reg -| sar ITYPE, 47 -| cmp ITYPEd, LJ_TISNUM -| jump target -|.endmacro -|.macro checkint, reg, target; checknumx reg, target, jne; .endmacro -|.macro checkinttp, src, target; checknumx src, target, jne; .endmacro -|.macro checknum, reg, target; checknumx reg, target, jae; .endmacro -|.macro checknumtp, src, target; checknumx src, target, jae; .endmacro -|.macro checknumber, src, target; checknumx src, target, ja; .endmacro -| -|.macro mov_false, reg; mov64 reg, (int64_t)~((uint64_t)1<<47); .endmacro -|.macro mov_true, reg; mov64 reg, (int64_t)~((uint64_t)2<<47); .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, PCd -| shr reg, 1 -| and reg, HOTCOUNT_PCMASK -| sub word [DISPATCH+reg+GG_DISP2HOT], HOTCOUNT_LOOP -| jb ->vm_hotloop -|.endmacro -| -|.macro hotcall, reg -| mov reg, PCd -| 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 -| -|.macro fpop1; fstp st1; .endmacro -| -|// Synthesize SSE FP constants. -|.macro sseconst_abs, reg, tmp // Synthesize abs mask. -| mov64 tmp, U64x(7fffffff,ffffffff); movd reg, tmp -|.endmacro -| -|.macro sseconst_hi, reg, tmp, val // Synthesize hi-32 bit const. -| mov64 tmp, U64x(val,00000000); movd reg, tmp -|.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 PCd, FRAME_P - | jz ->cont_dispatch - | - | // Return from pcall or xpcall fast func. - | and PC, -8 - | sub BASE, PC // Restore caller base. - | lea RA, [RA+PC-8] // Rebase RA and prepend one result. - | mov PC, [BASE-8] // Fetch PC of previous frame. - | // Prepending may overwrite the pcall frame, so do it at the end. - | mov_true ITYPE - | mov aword [BASE+RA], ITYPE // Prepend true to results. - | - |->vm_returnc: - | add RDd, 1 // RD = nresults+1 - | jz ->vm_unwind_yield - | mov MULTRES, RDd - | 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 PCd, FRAME_TYPE - | jnz ->vm_returnp - | - | // Return to C. - | set_vmstate C - | and PC, -8 - | sub PC, BASE - | neg PC // Previous base = BASE - delta. - | - | sub RDd, 1 - | jz >2 - |1: // Move results down. - | mov RB, [BASE+RA] - | mov [BASE-16], RB - | add BASE, 8 - | sub RDd, 1 - | jnz <1 - |2: - | mov L:RB, SAVE_L - | mov L:RB->base, PC - |3: - | mov RDd, MULTRES - | mov RAd, SAVE_NRES // RA = wanted nresults+1 - |4: - | cmp RAd, RDd - | jne >6 // More/less results wanted? - |5: - | sub BASE, 16 - | mov L:RB->top, BASE - | - |->vm_leave_cp: - | mov RA, SAVE_CFRAME // Restore previous C frame. - | mov L:RB->cframe, RA - | 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 aword [BASE-16], LJ_TNIL - | add BASE, 8 - | add RDd, 1 - | jmp <4 - | - |7: // Less results wanted. - | test RAd, RAd - | 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, RDd // Need to fill only remainder with nil. - | mov CARG2d, RAd - | mov CARG1, L:RB - | call extern lj_state_growstack // (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: // Unwind C stack, return from vm_pcall. - | // (void *cframe, int errcode) - | mov eax, CARG2d // Error return status for vm_pcall. - | mov rsp, CARG1 - |->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 not X64WIN - | mov CARG1, SAVE_L - | mov CARG2d, eax - | restoreregs - | jmp extern lj_err_throw // (lua_State *L, int errcode) - |.endif - | - |->vm_unwind_ff: // Unwind C stack, return from ff pcall. - | // (void *cframe) - | and CARG1, CFRAME_RAWMASK - | mov rsp, CARG1 - |->vm_unwind_ff_eh: // Landing pad for external unwinder. - | mov L:RB, SAVE_L - | mov RDd, 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-8] // Fetch PC of previous frame. - | mov_false RA - | mov RB, [BASE] - | mov [BASE-16], RA // Prepend false to error message. - | mov [BASE-8], RB - | mov RA, -16 // Results start at BASE+RA = BASE-16. - | set_vmstate INTERP - | jmp ->vm_returnc // Increments RD/MULTRES and returns. - | - |//----------------------------------------------------------------------- - |//-- Grow stack for calls ----------------------------------------------- - |//----------------------------------------------------------------------- - | - |->vm_growstack_c: // Grow stack for C function. - | mov CARG2d, LUA_MINSTACK - | jmp >2 - | - |->vm_growstack_v: // Grow stack for vararg Lua function. - | sub RD, 16 // LJ_FR2 - | 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 RAd, 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 CARG2, RA - |2: - | // RB = L, L->base = new base, L->top = top - | mov CARG1, L:RB - | call extern lj_state_growstack // (lua_State *L, int n) - | mov BASE, L:RB->base - | mov RD, L:RB->top - | mov LFUNC:RB, [BASE-16] - | cleartp LFUNC:RB - | sub RD, BASE - | shr RDd, 3 - | add NARGS:RDd, 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 - | mov L:RB, CARG1 // Caveat: CARG1 may be RA. - | mov SAVE_L, CARG1 - | mov RA, CARG2 - | mov PCd, FRAME_CP - | xor RDd, RDd - | lea KBASE, [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, RD - | mov SAVE_NRES, RDd - | mov SAVE_ERRF, RDd - | mov L:RB->cframe, KBASE - | 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 RDd, 3 - | add RDd, 1 // RD = nresults+1 - | sub RA, BASE // RA = resultofs - | mov PC, [BASE-8] - | mov MULTRES, RDd - | test PCd, 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 PCd, FRAME_CP - | mov SAVE_ERRF, CARG4d - | jmp >1 - | - |->vm_call: // Setup C frame and enter VM. - | // (lua_State *L, TValue *base, int nres1) - | saveregs - | mov PCd, FRAME_C - | - |1: // Entry point for vm_pcall above (PC = ftype). - | mov SAVE_NRES, CARG3d - | mov L:RB, CARG1 // Caveat: CARG1 may be RA. - | mov SAVE_L, CARG1 - | mov RA, CARG2 - | - | mov DISPATCH, L:RB->glref // Setup pointer to dispatch table. - | mov KBASE, L:RB->cframe // Add our C frame to cframe chain. - | mov SAVE_CFRAME, KBASE - | mov SAVE_PC, L:RB // Any value outside of bytecode is ok. - | add DISPATCH, GG_G2DISP - | mov L:RB->cframe, rsp - | - |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:RDd, 3 - | add NARGS:RDd, 1 // RD = nargs+1 - | - |->vm_call_dispatch: - | mov LFUNC:RB, [RA-16] - | checkfunc LFUNC:RB, ->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 - | mov L:RB, CARG1 // Caveat: CARG1 may be RA. - | mov SAVE_L, CARG1 - | 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, KBASEd // Neg. delta means cframe w/o frame. - | add DISPATCH, GG_G2DISP - | // Handler may change cframe_nres(L->cframe) or cframe_errfunc(L->cframe). - | - | mov KBASE, L:RB->cframe // Add our C frame to cframe chain. - | mov SAVE_CFRAME, KBASE - | mov L:RB->cframe, rsp - | mov [DISPATCH+DISPATCH_GL(cur_L)], L:RB - | - | call CARG4 // (lua_State *L, lua_CFunction func, void *ud) - | // 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 PCd, 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 aword [RA+RD*8-8], LJ_TNIL // Ensure one valid arg. - | mov RC, RA // ... in [RC] - | mov PC, [RB-24] // Restore PC from [cont|PC]. - | mov RA, qword [RB-32] // May be negative on WIN64 with debug. - |.if FFI - | cmp RA, 1 - | jbe >1 - |.endif - | mov LFUNC:KBASE, [BASE-16] - | cleartp LFUNC:KBASE - | mov KBASE, LFUNC:KBASE->pc - | mov KBASE, [KBASE+PC2PROTO(k)] - | // BASE = base, RC = result, RB = meta base - | jmp RA // 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 RBd, 3 - | lea RDd, [RBd-3] - | jmp ->vm_call_tail - |.endif - | - |->cont_cat: // BASE = base, RC = result, RB = mbase - | movzx RAd, PC_RB - | sub RB, 32 - | lea RA, [BASE+RA*8] - | sub RA, RB - | je ->cont_ra - | neg RA - | shr RAd, 3 - |.if X64WIN - | mov CARG3d, RAd - | mov L:CARG1, SAVE_L - | mov L:CARG1->base, BASE - | mov RC, [RC] - | mov [RB], RC - | mov CARG2, RB - |.else - | mov L:CARG1, SAVE_L - | mov L:CARG1->base, BASE - | mov CARG3d, RAd - | mov RA, [RC] - | mov [RB], RA - | mov CARG2, RB - |.endif - | jmp ->BC_CAT_Z - | - |//-- Table indexing metamethods ----------------------------------------- - | - |->vmeta_tgets: - | settp STR:RC, LJ_TSTR // STR:RC = GCstr * - | mov TMP1, STR:RC - | lea RC, TMP1 - | cmp PC_OP, BC_GGET - | jne >1 - | settp TAB:RA, TAB:RB, LJ_TTAB // TAB:RB = GCtab * - | lea RB, [DISPATCH+DISPATCH_GL(tmptv)] // Store fn->l.env in g->tmptv. - | mov [RB], TAB:RA - | jmp >2 - | - |->vmeta_tgetb: - | movzx RCd, PC_RC - |.if DUALNUM - | setint RC - | mov TMP1, RC - |.else - | cvtsi2sd xmm0, RCd - | movsd TMP1, xmm0 - |.endif - | lea RC, TMP1 - | jmp >1 - | - |->vmeta_tgetv: - | movzx RCd, PC_RC // Reload TValue *k from RC. - | lea RC, [BASE+RC*8] - |1: - | movzx RBd, PC_RB // Reload TValue *t from RB. - | lea RB, [BASE+RB*8] - |2: - | mov L:CARG1, SAVE_L - | mov L:CARG1->base, BASE // Caveat: CARG2/CARG3 may be BASE. - | mov CARG2, RB - | mov CARG3, RC - | mov L:RB, L:CARG1 - | 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 RAd, PC_RA - | mov RB, [RC] - | mov [BASE+RA*8], RB - | ins_next - | - |3: // Call __index metamethod. - | // BASE = base, L->top = new base, stack = cont/func/t/k - | mov RA, L:RB->top - | mov [RA-24], PC // [cont|PC] - | lea PC, [RA+FRAME_CONT] - | sub PC, BASE - | mov LFUNC:RB, [RA-16] // Guaranteed to be a function here. - | mov NARGS:RDd, 2+1 // 2 args for func(t, k). - | cleartp LFUNC:RB - | jmp ->vm_call_dispatch_f - | - |->vmeta_tgetr: - | mov CARG1, TAB:RB - | mov RB, BASE // Save BASE. - | mov CARG2d, RCd // Caveat: CARG2 == BASE - | call extern lj_tab_getinth // (GCtab *t, int32_t key) - | // cTValue * or NULL returned in eax (RC). - | movzx RAd, PC_RA - | mov BASE, RB // Restore BASE. - | test RC, RC - | jnz ->BC_TGETR_Z - | mov ITYPE, LJ_TNIL - | jmp ->BC_TGETR2_Z - | - |//----------------------------------------------------------------------- - | - |->vmeta_tsets: - | settp STR:RC, LJ_TSTR // STR:RC = GCstr * - | mov TMP1, STR:RC - | lea RC, TMP1 - | cmp PC_OP, BC_GSET - | jne >1 - | settp TAB:RA, TAB:RB, LJ_TTAB // TAB:RB = GCtab * - | lea RB, [DISPATCH+DISPATCH_GL(tmptv)] // Store fn->l.env in g->tmptv. - | mov [RB], TAB:RA - | jmp >2 - | - |->vmeta_tsetb: - | movzx RCd, PC_RC - |.if DUALNUM - | setint RC - | mov TMP1, RC - |.else - | cvtsi2sd xmm0, RCd - | movsd TMP1, xmm0 - |.endif - | lea RC, TMP1 - | jmp >1 - | - |->vmeta_tsetv: - | movzx RCd, PC_RC // Reload TValue *k from RC. - | lea RC, [BASE+RC*8] - |1: - | movzx RBd, PC_RB // Reload TValue *t from RB. - | lea RB, [BASE+RB*8] - |2: - | mov L:CARG1, SAVE_L - | mov L:CARG1->base, BASE // Caveat: CARG2/CARG3 may be BASE. - | mov CARG2, RB - | mov CARG3, RC - | mov L:RB, L:CARG1 - | 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 RAd, PC_RA - | mov RB, [BASE+RA*8] - | mov [RC], RB - |->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-24], PC // [cont|PC] - | movzx RCd, PC_RA - | // Copy value to third argument. - | mov RB, [BASE+RC*8] - | mov [RA+16], RB - | lea PC, [RA+FRAME_CONT] - | sub PC, BASE - | mov LFUNC:RB, [RA-16] // Guaranteed to be a function here. - | mov NARGS:RDd, 3+1 // 3 args for func(t, k, v). - | cleartp LFUNC:RB - | jmp ->vm_call_dispatch_f - | - |->vmeta_tsetr: - |.if X64WIN - | mov L:CARG1, SAVE_L - | mov CARG3d, RCd - | mov L:CARG1->base, BASE - | xchg CARG2, TAB:RB // Caveat: CARG2 == BASE. - |.else - | mov L:CARG1, SAVE_L - | mov CARG2, TAB:RB - | mov L:CARG1->base, BASE - | mov RB, BASE // Save BASE. - | mov CARG3d, RCd // Caveat: CARG3 == 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 RAd, PC_RA - | mov BASE, RB // Restore BASE. - | jmp ->BC_TSETR_Z - | - |//-- Comparison metamethods --------------------------------------------- - | - |->vmeta_comp: - | movzx RDd, PC_RD - | movzx RAd, PC_RA - | mov L:RB, SAVE_L - | mov L:RB->base, BASE // Caveat: CARG2/CARG3 == BASE. - |.if X64WIN - | lea CARG3, [BASE+RD*8] - | lea CARG2, [BASE+RA*8] - |.else - | lea CARG2, [BASE+RA*8] - | lea CARG3, [BASE+RD*8] - |.endif - | mov CARG1, L:RB // Caveat: CARG1/CARG4 == RA. - | movzx CARG4d, PC_OP - | 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 RDd, PC_RD - | branchPC RD - |6: - | ins_next - | - |->cont_condt: // BASE = base, RC = result - | add PC, 4 - | mov ITYPE, [RC] - | sar ITYPE, 47 - | cmp ITYPEd, LJ_TISTRUECOND // Branch if result is true. - | jb <5 - | jmp <6 - | - |->cont_condf: // BASE = base, RC = result - | mov ITYPE, [RC] - | sar ITYPE, 47 - | cmp ITYPEd, LJ_TISTRUECOND // Branch if result is false. - | jmp <4 - | - |->vmeta_equal: - | cleartp TAB:RD - | sub PC, 4 - |.if X64WIN - | mov CARG3, RD - | mov CARG4d, RBd - | mov L:RB, SAVE_L - | mov L:RB->base, BASE // Caveat: CARG2 == BASE. - | mov CARG2, RA - | mov CARG1, L:RB // Caveat: CARG1 == RA. - |.else - | mov CARG2, RA - | mov CARG4d, RBd // Caveat: CARG4 == RA. - | mov L:RB, SAVE_L - | mov L:RB->base, BASE // Caveat: CARG3 == BASE. - | mov CARG3, RD - | mov CARG1, L:RB - |.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 CARG1, L:RB - | mov CARG2d, dword [PC-4] - | mov SAVE_PC, PC - | call extern lj_meta_equal_cd // (lua_State *L, BCIns ins) - | // 0/1 or TValue * (metamethod) returned in eax (RC). - | jmp <3 - |.endif - | - |->vmeta_istype: - | mov L:RB, SAVE_L - | mov L:RB->base, BASE // Caveat: CARG2/CARG3 may be BASE. - | mov CARG2d, RAd - | mov CARG3d, RDd - | mov L:CARG1, L:RB - | 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 RBd, PC_RB - | movzx RCd, PC_RC - |.endif - |->vmeta_arith_vn: - | lea RC, [KBASE+RC*8] - | jmp >1 - | - |->vmeta_arith_nvo: - |.if DUALNUM - | movzx RBd, PC_RB - | movzx RCd, PC_RC - |.endif - |->vmeta_arith_nv: - | lea TMPR, [KBASE+RC*8] - | lea RC, [BASE+RB*8] - | mov RB, TMPR - | jmp >2 - | - |->vmeta_unm: - | lea RC, [BASE+RD*8] - | mov RB, RC - | jmp >2 - | - |->vmeta_arith_vvo: - |.if DUALNUM - | movzx RBd, PC_RB - | movzx RCd, PC_RC - |.endif - |->vmeta_arith_vv: - | lea RC, [BASE+RC*8] - |1: - | lea RB, [BASE+RB*8] - |2: - | lea RA, [BASE+RA*8] - |.if X64WIN - | mov CARG3, RB - | mov CARG4, RC - | movzx RCd, PC_OP - | mov ARG5d, RCd - | mov L:RB, SAVE_L - | mov L:RB->base, BASE // Caveat: CARG2 == BASE. - | mov CARG2, RA - | mov CARG1, L:RB // Caveat: CARG1 == RA. - |.else - | movzx CARG5d, PC_OP - | mov CARG2, RA - | mov CARG4, RC // Caveat: CARG4 == RA. - | mov L:CARG1, SAVE_L - | mov L:CARG1->base, BASE // Caveat: CARG3 == BASE. - | mov CARG3, RB - | mov L:RB, L:CARG1 - |.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-24], PC // [cont|PC] - | lea PC, [RC+FRAME_CONT] - | mov NARGS:RDd, 2+1 // 2 args for func(o1, o2). - | jmp ->vm_call_dispatch - | - |->vmeta_len: - | movzx RDd, PC_RD - | mov L:RB, SAVE_L - | mov L:RB->base, BASE - | lea CARG2, [BASE+RD*8] // Caveat: CARG2 == BASE - | mov L:CARG1, L:RB - | mov SAVE_PC, PC - | call extern lj_meta_len // (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 RDd, PC_RD - | mov TAB:CARG1, [BASE+RD*8] - | cleartp TAB:CARG1 - | jmp ->BC_LEN_Z -#else - | jmp ->vmeta_binop // Binop call for compatibility. -#endif - | - |//-- Call metamethod ---------------------------------------------------- - | - |->vmeta_call_ra: - | lea RA, [BASE+RA*8+16] - |->vmeta_call: // Resolve and call __call metamethod. - | // BASE = old base, RA = new base, RC = nargs+1, PC = return - | mov TMP1d, NARGS:RDd // Save RA, RC for us. - | mov RB, RA - |.if X64WIN - | mov L:TMPR, SAVE_L - | mov L:TMPR->base, BASE // Caveat: CARG2 is BASE. - | lea CARG2, [RA-16] - | lea CARG3, [RA+NARGS:RD*8-8] - | mov CARG1, L:TMPR // Caveat: CARG1 is RA. - |.else - | mov L:CARG1, SAVE_L - | mov L:CARG1->base, BASE // Caveat: CARG3 is BASE. - | lea CARG2, [RA-16] - | lea CARG3, [RA+NARGS:RD*8-8] - |.endif - | mov SAVE_PC, PC - | call extern lj_meta_call // (lua_State *L, TValue *func, TValue *top) - | mov RA, RB - | mov L:RB, SAVE_L - | mov BASE, L:RB->base - | mov NARGS:RDd, TMP1d - | mov LFUNC:RB, [RA-16] - | add NARGS:RDd, 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 - | cleartp LFUNC:RB - | 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 CARG2, RA // Caveat: CARG2 == BASE - | mov L:CARG1, L:RB // Caveat: CARG1 == RA - | mov SAVE_PC, PC - | call extern lj_meta_for // (lua_State *L, TValue *base) - | mov BASE, L:RB->base - | mov RCd, [PC-4] - | movzx RAd, RCH - | movzx OP, RCL - | shr RCd, 16 - | jmp aword [DISPATCH+OP*8+GG_DISP2STATIC] // Retry FORI or JFORI. - | - |//----------------------------------------------------------------------- - |//-- Fast functions ----------------------------------------------------- - |//----------------------------------------------------------------------- - | - |.macro .ffunc, name - |->ff_ .. name: - |.endmacro - | - |.macro .ffunc_1, name - |->ff_ .. name: - | cmp NARGS:RDd, 1+1; jb ->fff_fallback - |.endmacro - | - |.macro .ffunc_2, name - |->ff_ .. name: - | cmp NARGS:RDd, 2+1; jb ->fff_fallback - |.endmacro - | - |.macro .ffunc_n, name, op - | .ffunc_1 name - | checknumtp [BASE], ->fff_fallback - | op xmm0, qword [BASE] - |.endmacro - | - |.macro .ffunc_n, name - | .ffunc_n name, movsd - |.endmacro - | - |.macro .ffunc_nn, name - | .ffunc_2 name - | checknumtp [BASE], ->fff_fallback - | checknumtp [BASE+8], ->fff_fallback - | movsd xmm0, qword [BASE] - | movsd xmm1, qword [BASE+8] - |.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 ITYPE, [BASE] - | mov RB, ITYPE - | sar ITYPE, 47 - | cmp ITYPEd, LJ_TISTRUECOND; jae ->fff_fallback - | mov PC, [BASE-8] - | mov MULTRES, RDd - | mov RB, [BASE] - | mov [BASE-16], RB - | sub RDd, 2 - | jz >2 - | mov RA, BASE - |1: - | add RA, 8 - | mov RB, [RA] - | mov [RA-16], RB - | sub RDd, 1 - | jnz <1 - |2: - | mov RDd, MULTRES - | jmp ->fff_res_ - | - |.ffunc_1 type - | mov RC, [BASE] - | sar RC, 47 - | mov RBd, LJ_TISNUM - | cmp RCd, RBd - | cmovb RCd, RBd - | not RCd - |2: - | mov CFUNC:RB, [BASE-16] - | cleartp CFUNC:RB - | mov STR:RC, [CFUNC:RB+RC*8+((char *)(&((GCfuncC *)0)->upvalue))] - | mov PC, [BASE-8] - | settp STR:RC, LJ_TSTR - | mov [BASE-16], STR:RC - | jmp ->fff_res1 - | - |//-- Base library: getters and setters --------------------------------- - | - |.ffunc_1 getmetatable - | mov TAB:RB, [BASE] - | mov PC, [BASE-8] - | checktab TAB:RB, >6 - |1: // Field metatable must be at same offset for GCtab and GCudata! - | mov TAB:RB, TAB:RB->metatable - |2: - | test TAB:RB, TAB:RB - | mov aword [BASE-16], LJ_TNIL - | jz ->fff_res1 - | settp TAB:RC, TAB:RB, LJ_TTAB - | mov [BASE-16], TAB:RC // Store metatable as default result. - | mov STR:RC, [DISPATCH+DISPATCH_GL(gcroot)+8*(GCROOT_MMNAME+MM_metatable)] - | mov RAd, TAB:RB->hmask - | and RAd, STR:RC->hash - | settp STR:RC, LJ_TSTR - | imul RAd, #NODE - | add NODE:RA, TAB:RB->node - |3: // Rearranged logic, because we expect _not_ to find the key. - | cmp NODE:RA->key, 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, NODE:RA->val - | cmp RB, LJ_TNIL; je ->fff_res1 // Ditto for nil value. - | mov [BASE-16], RB // Return value of mt.__metatable. - | jmp ->fff_res1 - | - |6: - | cmp ITYPEd, LJ_TUDATA; je <1 - | cmp ITYPEd, LJ_TISNUM; ja >7 - | mov ITYPEd, LJ_TISNUM - |7: - | not ITYPEd - | mov TAB:RB, [DISPATCH+ITYPE*8+DISPATCH_GL(gcroot[GCROOT_BASEMT])] - | jmp <2 - | - |.ffunc_2 setmetatable - | mov TAB:RB, [BASE] - | mov TAB:TMPR, TAB:RB - | checktab TAB:RB, ->fff_fallback - | // Fast path: no mt for table yet and not clearing the mt. - | cmp aword TAB:RB->metatable, 0; jne ->fff_fallback - | mov TAB:RA, [BASE+8] - | checktab TAB:RA, ->fff_fallback - | mov TAB:RB->metatable, TAB:RA - | mov PC, [BASE-8] - | mov [BASE-16], TAB:TMPR // Return original table. - | 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 - |.if X64WIN - | mov TAB:RA, [BASE] - | checktab TAB:RA, ->fff_fallback - | mov RB, BASE // Save BASE. - | lea CARG3, [BASE+8] - | mov CARG2, TAB:RA // Caveat: CARG2 == BASE. - | mov CARG1, SAVE_L - |.else - | mov TAB:CARG2, [BASE] - | checktab TAB:CARG2, ->fff_fallback - | mov RB, BASE // Save BASE. - | lea CARG3, [BASE+8] // Caveat: CARG3 == BASE. - | mov CARG1, SAVE_L - |.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. - | mov RB, [RD] - | mov PC, [BASE-8] - | mov [BASE-16], RB - | jmp ->fff_res1 - | - |//-- Base library: conversions ------------------------------------------ - | - |.ffunc tonumber - | // Only handles the number case inline (without a base argument). - | cmp NARGS:RDd, 1+1; jne ->fff_fallback // Exactly one argument. - | mov RB, [BASE] - | checknumber RB, ->fff_fallback - | mov PC, [BASE-8] - | mov [BASE-16], RB - | jmp ->fff_res1 - | - |.ffunc_1 tostring - | // Only handles the string or number case inline. - | mov PC, [BASE-8] - | mov STR:RB, [BASE] - | checktp_nc STR:RB, LJ_TSTR, >3 - | // A __tostring method in the string base metatable is ignored. - |2: - | mov [BASE-16], STR:RB - | jmp ->fff_res1 - |3: // Handle numbers inline, unless a number base metatable is present. - | cmp ITYPEd, LJ_TISNUM; ja ->fff_fallback_1 - | cmp aword [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 not X64WIN - | mov CARG2, BASE // Otherwise: CARG2 == BASE - |.endif - | mov L:CARG1, L:RB - |.if DUALNUM - | call extern lj_strfmt_number // (lua_State *L, cTValue *o) - |.else - | call extern lj_strfmt_num // (lua_State *L, lua_Number *np) - |.endif - | // GCstr returned in eax (RD). - | mov BASE, L:RB->base - | settp STR:RB, RD, LJ_TSTR - | jmp <2 - | - |//-- Base library: iterators ------------------------------------------- - | - |.ffunc_1 next - | je >2 // Missing 2nd arg? - |1: - |.if X64WIN - | mov RA, [BASE] - | checktab RA, ->fff_fallback - |.else - | mov CARG2, [BASE] - | checktab CARG2, ->fff_fallback - |.endif - | 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-8] - |.if X64WIN - | lea CARG3, [BASE+8] - | mov CARG2, RA // Caveat: CARG2 == BASE. - | mov CARG1, L:RB - |.else - | lea CARG3, [BASE+8] // Caveat: CARG3 == BASE. - | mov CARG1, L:RB - |.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 RDd, RDd; jz >3 // End of traversal? - | // Copy key and value to results. - | mov RB, [BASE+8] - | mov RD, [BASE+16] - | mov [BASE-16], RB - | mov [BASE-8], RD - |->fff_res2: - | mov RDd, 1+2 - | jmp ->fff_res - |2: // Set missing 2nd arg to nil. - | mov aword [BASE+8], LJ_TNIL - | jmp <1 - |3: // End of traversal: return nil. - | mov aword [BASE-16], LJ_TNIL - | jmp ->fff_res1 - | - |.ffunc_1 pairs - | mov TAB:RB, [BASE] - | mov TMPR, TAB:RB - | checktab TAB:RB, ->fff_fallback -#if LJ_52 - | cmp aword TAB:RB->metatable, 0; jne ->fff_fallback -#endif - | mov CFUNC:RD, [BASE-16] - | cleartp CFUNC:RD - | mov CFUNC:RD, CFUNC:RD->upvalue[0] - | settp CFUNC:RD, LJ_TFUNC - | mov PC, [BASE-8] - | mov [BASE-16], CFUNC:RD - | mov [BASE-8], TMPR - | mov aword [BASE], LJ_TNIL - | mov RDd, 1+3 - | jmp ->fff_res - | - |.ffunc_2 ipairs_aux - | mov TAB:RB, [BASE] - | checktab TAB:RB, ->fff_fallback - |.if DUALNUM - | mov RA, [BASE+8] - | checkint RA, ->fff_fallback - |.else - | checknumtp [BASE+8], ->fff_fallback - | movsd xmm0, qword [BASE+8] - |.endif - | mov PC, [BASE-8] - |.if DUALNUM - | add RAd, 1 - | setint ITYPE, RA - | mov [BASE-16], ITYPE - |.else - | sseconst_1 xmm1, TMPR - | addsd xmm0, xmm1 - | cvttsd2si RAd, xmm0 - | movsd qword [BASE-16], xmm0 - |.endif - | cmp RAd, TAB:RB->asize; jae >2 // Not in array part? - | mov RD, TAB:RB->array - | lea RD, [RD+RA*8] - |1: - | cmp aword [RD], LJ_TNIL; je ->fff_res0 - | // Copy array slot. - | mov RB, [RD] - | mov [BASE-8], RB - | jmp ->fff_res2 - |2: // Check for empty hash part first. Otherwise call C function. - | cmp dword TAB:RB->hmask, 0; je ->fff_res0 - |.if X64WIN - | mov TMPR, BASE - | mov CARG2d, RAd - | mov CARG1, TAB:RB - | mov RB, TMPR - |.else - | mov CARG1, TAB:RB - | mov RB, BASE // Save BASE. - | mov CARG2d, RAd // Caveat: CARG2 == BASE - |.endif - | call extern lj_tab_getinth // (GCtab *t, int32_t key) - | // cTValue * or NULL returned in eax (RD). - | mov BASE, RB - | test RD, RD - | jnz <1 - |->fff_res0: - | mov RDd, 1+0 - | jmp ->fff_res - | - |.ffunc_1 ipairs - | mov TAB:RB, [BASE] - | mov TMPR, TAB:RB - | checktab TAB:RB, ->fff_fallback -#if LJ_52 - | cmp aword TAB:RB->metatable, 0; jne ->fff_fallback -#endif - | mov CFUNC:RD, [BASE-16] - | cleartp CFUNC:RD - | mov CFUNC:RD, CFUNC:RD->upvalue[0] - | settp CFUNC:RD, LJ_TFUNC - | mov PC, [BASE-8] - | mov [BASE-16], CFUNC:RD - | mov [BASE-8], TMPR - |.if DUALNUM - | mov64 RD, ((uint64_t)LJ_TISNUM<<47) - | mov [BASE], RD - |.else - | mov qword [BASE], 0 - |.endif - | mov RDd, 1+3 - | jmp ->fff_res - | - |//-- Base library: catch errors ---------------------------------------- - | - |.ffunc_1 pcall - | lea RA, [BASE+16] - | sub NARGS:RDd, 1 - | mov PCd, 16+FRAME_PCALL - |1: - | movzx RBd, byte [DISPATCH+DISPATCH_GL(hookmask)] - | shr RB, HOOK_ACTIVE_SHIFT - | and RB, 1 - | add PC, RB // Remember active hook before pcall. - | // Note: this does a (harmless) copy of the function to the PC slot, too. - | mov KBASE, RD - |2: - | mov RB, [RA+KBASE*8-24] - | mov [RA+KBASE*8-16], RB - | sub KBASE, 1 - | ja <2 - | jmp ->vm_call_dispatch - | - |.ffunc_2 xpcall - | mov LFUNC:RA, [BASE+8] - | checktp_nc LFUNC:RA, LJ_TFUNC, ->fff_fallback - | mov LFUNC:RB, [BASE] // Swap function and traceback. - | mov [BASE], LFUNC:RA - | mov [BASE+8], LFUNC:RB - | lea RA, [BASE+24] - | sub NARGS:RDd, 2 - | mov PCd, 24+FRAME_PCALL - | jmp <1 - | - |//-- Coroutine library -------------------------------------------------- - | - |.macro coroutine_resume_wrap, resume - |.if resume - |.ffunc_1 coroutine_resume - | mov L:RB, [BASE] - | cleartp L:RB - |.else - |.ffunc coroutine_wrap_aux - | mov CFUNC:RB, [BASE-16] - | cleartp CFUNC:RB - | mov L:RB, CFUNC:RB->upvalue[0].gcr - | cleartp L:RB - |.endif - | mov PC, [BASE-8] - | mov SAVE_PC, PC - | mov TMP1, L:RB - |.if resume - | checktptp [BASE], LJ_TTHREAD, ->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 - | mov PC, [RA-8] // Move initial function up. - | mov [RA], PC - | add RA, 8 - |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 RB, PC // Relative to PC. - | - | cmp PC, RA - | je >3 - |2: // Move args to coroutine. - | mov RC, [PC+RB] - | mov [PC-8], RC - | sub PC, 8 - | cmp PC, RA - | jne <2 - |3: - | mov CARG2, RA - | mov CARG1, TMP1 - | call ->vm_resume // (lua_State *L, TValue *base, 0, 0) - | - | mov L:RB, SAVE_L - | mov L:PC, TMP1 - | 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 PCd, 3 - | cmp RD, L:RB->maxstack - | ja >9 // Need to grow stack? - | - | mov RB, BASE - | sub RB, RA - |5: // Move results from coroutine. - | mov RD, [RA] - | mov [RA+RB], RD - | add RA, 8 - | cmp RA, KBASE - | jne <5 - |6: - |.if resume - | lea RDd, [PCd+2] // nresults+1 = 1 + true + results. - | mov_true ITYPE // Prepend true to results. - | mov [BASE-8], ITYPE - |.else - | lea RDd, [PCd+1] // nresults+1 = 1 + results. - |.endif - |7: - | mov PC, SAVE_PC - | mov MULTRES, RDd - |.if resume - | mov RA, -8 - |.else - | xor RAd, RAd - |.endif - | test PCd, FRAME_TYPE - | jz ->BC_RET_Z - | jmp ->vm_return - | - |8: // Coroutine returned with error (at co->top-1). - |.if resume - | mov_false ITYPE // Prepend false to results. - | mov [BASE-8], ITYPE - | mov RA, L:PC->top - | sub RA, 8 - | mov L:PC->top, RA // Clear error from coroutine stack. - | // Copy error message. - | mov RD, [RA] - | mov [BASE], RD - | mov RDd, 1+2 // nresults+1 = 1 + false + error. - | jmp <7 - |.else - | mov CARG2, L:PC - | mov CARG1, L:RB - | call extern lj_ffh_coroutine_wrap_err // (lua_State *L, lua_State *co) - | // Error function does not return. - |.endif - | - |9: // Handle stack expansion on return from yield. - | mov L:RA, TMP1 - | mov L:RA->top, KBASE // Undo coroutine stack clearing. - | mov CARG2, PC - | mov CARG1, L:RB - | call extern lj_state_growstack // (lua_State *L, int n) - | mov L:PC, TMP1 - | 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 RDd, RDd - | mov aword L:RB->cframe, RD - | mov al, LUA_YIELD - | mov byte L:RB->status, al - | jmp ->vm_leave_unw - | - |//-- Math library ------------------------------------------------------- - | - | .ffunc_1 math_abs - | mov RB, [BASE] - |.if DUALNUM - | checkint RB, >3 - | cmp RBd, 0; jns ->fff_resi - | neg RBd; js >2 - |->fff_resbit: - |->fff_resi: - | setint RB - |->fff_resRB: - | mov PC, [BASE-8] - | mov [BASE-16], RB - | jmp ->fff_res1 - |2: - | mov64 RB, U64x(41e00000,00000000) // 2^31. - | jmp ->fff_resRB - |3: - | ja ->fff_fallback - |.else - | checknum RB, ->fff_fallback - |.endif - | shl RB, 1 - | shr RB, 1 - | mov PC, [BASE-8] - | mov [BASE-16], RB - | jmp ->fff_res1 - | - |.ffunc_n math_sqrt, sqrtsd - |->fff_resxmm0: - | mov PC, [BASE-8] - | movsd qword [BASE-16], xmm0 - | // fallthrough - | - |->fff_res1: - | mov RDd, 1+1 - |->fff_res: - | mov MULTRES, RDd - |->fff_res_: - | test PCd, 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 RAd, PC_RA - | neg RA - | lea BASE, [BASE+RA*8-16] // base = base - (RA+2)*8 - | ins_next - | - |6: // Fill up results with nil. - | mov aword [BASE+RD*8-24], LJ_TNIL - | add RD, 1 - | jmp <5 - | - |7: // Non-standard return case. - | mov RA, -16 // Results start at BASE+RA = BASE-16. - | jmp ->vm_return - | - |.macro math_round, func - | .ffunc math_ .. func - |.if DUALNUM - | mov RB, [BASE] - | checknumx RB, ->fff_resRB, je - | ja ->fff_fallback - |.else - | checknumtp [BASE], ->fff_fallback - |.endif - | movsd xmm0, qword [BASE] - | call ->vm_ .. func .. _sse - |.if DUALNUM - | cvttsd2si RBd, xmm0 - | cmp RBd, 0x80000000 - | jne ->fff_resi - | cvtsi2sd xmm1, RBd - | ucomisd xmm0, xmm1 - | jp ->fff_resxmm0 - | je ->fff_resi - |.endif - | jmp ->fff_resxmm0 - |.endmacro - | - | math_round floor - | math_round ceil - | - |.ffunc math_log - | cmp NARGS:RDd, 1+1; jne ->fff_fallback // Exactly one argument. - | checknumtp [BASE], ->fff_fallback - | movsd xmm0, qword [BASE] - | mov RB, BASE - | call extern log - | mov BASE, RB - | jmp ->fff_resxmm0 - | - |.macro math_extern, func - | .ffunc_n math_ .. func - | mov RB, BASE - | call extern func - | mov BASE, RB - | jmp ->fff_resxmm0 - |.endmacro - | - |.macro math_extern2, func - | .ffunc_nn math_ .. func - | mov RB, BASE - | call extern func - | mov BASE, RB - | jmp ->fff_resxmm0 - |.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_2 math_ldexp - | checknumtp [BASE], ->fff_fallback - | checknumtp [BASE+8], ->fff_fallback - | fld qword [BASE+8] - | fld qword [BASE] - | fscale - | fpop1 - | mov PC, [BASE-8] - | fstp qword [BASE-16] - | jmp ->fff_res1 - | - |.ffunc_n math_frexp - | mov RB, BASE - |.if X64WIN - | lea CARG2, TMP1 // Caveat: CARG2 == BASE - |.else - | lea CARG1, TMP1 - |.endif - | call extern frexp - | mov BASE, RB - | mov RBd, TMP1d - | mov PC, [BASE-8] - | movsd qword [BASE-16], xmm0 - |.if DUALNUM - | setint RB - | mov [BASE-8], RB - |.else - | cvtsi2sd xmm1, RBd - | movsd qword [BASE-8], xmm1 - |.endif - | mov RDd, 1+2 - | jmp ->fff_res - | - |.ffunc_n math_modf - | mov RB, BASE - |.if X64WIN - | lea CARG2, [BASE-16] // Caveat: CARG2 == BASE - |.else - | lea CARG1, [BASE-16] - |.endif - | call extern modf - | mov BASE, RB - | mov PC, [BASE-8] - | movsd qword [BASE-8], xmm0 - | mov RDd, 1+2 - | jmp ->fff_res - | - |.macro math_minmax, name, cmovop, sseop - | .ffunc name - | mov RAd, 2 - |.if DUALNUM - | mov RB, [BASE] - | checkint RB, >4 - |1: // Handle integers. - | cmp RAd, RDd; jae ->fff_resRB - | mov TMPR, [BASE+RA*8-8] - | checkint TMPR, >3 - | cmp RBd, TMPRd - | cmovop RB, TMPR - | add RAd, 1 - | jmp <1 - |3: - | ja ->fff_fallback - | // Convert intermediate result to number and continue below. - | cvtsi2sd xmm0, RBd - | jmp >6 - |4: - | ja ->fff_fallback - |.else - | checknumtp [BASE], ->fff_fallback - |.endif - | - | movsd xmm0, qword [BASE] - |5: // Handle numbers or integers. - | cmp RAd, RDd; jae ->fff_resxmm0 - |.if DUALNUM - | mov RB, [BASE+RA*8-8] - | checknumx RB, >6, jb - | ja ->fff_fallback - | cvtsi2sd xmm1, RBd - | jmp >7 - |.else - | checknumtp [BASE+RA*8-8], ->fff_fallback - |.endif - |6: - | movsd xmm1, qword [BASE+RA*8-8] - |7: - | sseop xmm0, xmm1 - | add RAd, 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:RDd, 1+1; jne ->fff_fallback - | mov STR:RB, [BASE] - | checkstr STR:RB, ->fff_fallback - | mov PC, [BASE-8] - | cmp dword STR:RB->len, 1 - | jb ->fff_res0 // Return no results for empty string. - | movzx RBd, byte STR:RB[1] - |.if DUALNUM - | jmp ->fff_resi - |.else - | cvtsi2sd xmm0, RBd; jmp ->fff_resxmm0 - |.endif - | - |.ffunc string_char // Only handle the 1-arg case here. - | ffgccheck - | cmp NARGS:RDd, 1+1; jne ->fff_fallback // *Exactly* 1 arg. - |.if DUALNUM - | mov RB, [BASE] - | checkint RB, ->fff_fallback - |.else - | checknumtp [BASE], ->fff_fallback - | cvttsd2si RBd, qword [BASE] - |.endif - | cmp RBd, 255; ja ->fff_fallback - | mov TMP1d, RBd - | mov TMPRd, 1 - | lea RD, TMP1 // Points to stack. Little-endian. - |->fff_newstr: - | mov L:RB, SAVE_L - | mov L:RB->base, BASE - | mov CARG3d, TMPRd // Zero-extended to size_t. - | mov CARG2, RD - | mov CARG1, L:RB - | 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-8] - | settp STR:RD, LJ_TSTR - | mov [BASE-16], STR:RD - | jmp ->fff_res1 - | - |.ffunc string_sub - | ffgccheck - | mov TMPRd, -1 - | cmp NARGS:RDd, 1+2; jb ->fff_fallback - | jna >1 - |.if DUALNUM - | mov TMPR, [BASE+16] - | checkint TMPR, ->fff_fallback - |.else - | checknumtp [BASE+16], ->fff_fallback - | cvttsd2si TMPRd, qword [BASE+16] - |.endif - |1: - | mov STR:RB, [BASE] - | checkstr STR:RB, ->fff_fallback - |.if DUALNUM - | mov ITYPE, [BASE+8] - | mov RAd, ITYPEd // Must clear hiword for lea below. - | sar ITYPE, 47 - | cmp ITYPEd, LJ_TISNUM - | jne ->fff_fallback - |.else - | checknumtp [BASE+8], ->fff_fallback - | cvttsd2si RAd, qword [BASE+8] - |.endif - | mov RCd, STR:RB->len - | cmp RCd, TMPRd // len < end? (unsigned compare) - | jb >5 - |2: - | test RAd, RAd // start <= 0? - | jle >7 - |3: - | sub TMPRd, RAd // start > end? - | jl ->fff_emptystr - | lea RD, [STR:RB+RAd+#STR-1] - | add TMPRd, 1 - |4: - | jmp ->fff_newstr - | - |5: // Negative end or overflow. - | jl >6 - | lea TMPRd, [TMPRd+RCd+1] // end = end+(len+1) - | jmp <2 - |6: // Overflow. - | mov TMPRd, RCd // end = len - | jmp <2 - | - |7: // Negative start or underflow. - | je >8 - | add RAd, RCd // start = start+(len+1) - | add RAd, 1 - | jg <3 // start > 0? - |8: // Underflow. - | mov RAd, 1 // start = 1 - | jmp <3 - | - |->fff_emptystr: // Range underflow. - | xor TMPRd, TMPRd // Zero length. Any ptr in RD is ok. - | jmp <4 - | - |.macro ffstring_op, name - | .ffunc_1 string_ .. name - | ffgccheck - |.if X64WIN - | mov STR:TMPR, [BASE] - | checkstr STR:TMPR, ->fff_fallback - |.else - | mov STR:CARG2, [BASE] - | checkstr STR:CARG2, ->fff_fallback - |.endif - | mov L:RB, SAVE_L - | lea SBUF:CARG1, [DISPATCH+DISPATCH_GL(tmpbuf)] - | mov L:RB->base, BASE - |.if X64WIN - | mov STR:CARG2, STR:TMPR // Caveat: CARG2 == BASE - |.endif - | mov RC, SBUF:CARG1->b - | mov SBUF:CARG1->L, L:RB - | mov SBUF:CARG1->p, RC - | mov SAVE_PC, PC - | call extern lj_buf_putstr_ .. name - | mov CARG1, rax - | call extern lj_buf_tostr - | 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, RB - |.endif - |.if DUALNUM - | mov RB, [BASE] - | checkint RB, >1 - |.if kind > 0 - | jmp >2 - |.else - | jmp ->fff_resbit - |.endif - |1: - | ja ->fff_fallback - | movd xmm0, RB - |.else - | checknumtp [BASE], ->fff_fallback - | movsd xmm0, qword [BASE] - |.endif - |.if kind < 2 - | sseconst_tobit xmm1, RB - |.endif - | addsd xmm0, xmm1 - | movd RBd, 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 TMPRd, NARGS:RDd // Save for fallback. - | lea RD, [BASE+NARGS:RD*8-16] - |1: - | cmp RD, BASE - | jbe ->fff_resbit - |.if DUALNUM - | mov RA, [RD] - | checkint RA, >2 - | ins RBd, RAd - | sub RD, 8 - | jmp <1 - |2: - | ja ->fff_fallback_bit_op - | movd xmm0, RA - |.else - | checknumtp [RD], ->fff_fallback_bit_op - | movsd xmm0, qword [RD] - |.endif - | addsd xmm0, xmm1 - | movd RAd, xmm0 - | ins RBd, RAd - | 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 RBd - | jmp ->fff_resbit - | - |.ffunc_bit bit_bnot, 1 - | not RBd - |.if DUALNUM - | jmp ->fff_resbit - |.else - |->fff_resbit: - | cvtsi2sd xmm0, RBd - | jmp ->fff_resxmm0 - |.endif - | - |->fff_fallback_bit_op: - | mov NARGS:RDd, TMPRd // 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! - | mov RA, [BASE+8] - | checkint RA, ->fff_fallback - |.else - | .ffunc_nn name - | sseconst_tobit xmm2, RB - | addsd xmm0, xmm2 - | addsd xmm1, xmm2 - | movd RBd, xmm0 - | movd RAd, xmm1 - |.endif - | ins RBd, 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:RDd, 1+2 // Other args are ignored, anyway. - | jmp ->fff_fallback - |->fff_fallback_1: - | mov NARGS:RDd, 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-8] // 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-16] - | cleartp CFUNC:RD - | cmp RA, L:RB->maxstack - | ja >5 // Need to grow stack. - | mov CARG1, L:RB - | 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 RDd, RDd; jg ->fff_res // Returned nresults+1? - |1: - | mov RA, L:RB->top - | sub RA, BASE - | shr RAd, 3 - | test RDd, RDd - | lea NARGS:RDd, [RAd+1] - | mov LFUNC:RB, [BASE-16] - | jne ->vm_call_tail // Returned -1? - | cleartp LFUNC:RB - | ins_callt // Returned 0: retry fast path. - | - |// Reconstruct previous base for vmeta_call during tailcall. - |->vm_call_tail: - | mov RA, BASE - | test PCd, FRAME_TYPE - | jnz >3 - | movzx RBd, PC_RA - | neg RB - | lea BASE, [BASE+RB*8-16] // base = base - (RB+2)*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 CARG2d, LUA_MINSTACK - | mov CARG1, L:RB - | call extern lj_state_growstack // (lua_State *L, int n) - | mov BASE, L:RB->base - | xor RDd, RDd // 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 RB // Must keep stack at same level. - | mov TMP1, RB // 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 CARG1, L:RB - | mov L:RB->top, RD - | call extern lj_gc_step // (lua_State *L) - | mov BASE, L:RB->base - | mov RD, L:RB->top - | sub RD, BASE - | shr RDd, 3 - | add NARGS:RDd, 1 - | mov RB, TMP1 - | push RB // Restore return address. - | ret - | - |//----------------------------------------------------------------------- - |//-- Special dispatch targets ------------------------------------------- - |//----------------------------------------------------------------------- - | - |->vm_record: // Dispatch target for recording phase. - |.if JIT - | movzx RDd, 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 RDd, 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 RDd, 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 CARG2, PC // Caveat: CARG2 == BASE - | mov CARG1, L:RB - | // SAVE_PC must hold the _previous_ PC. The callee updates it with PC. - | call extern lj_dispatch_ins // (lua_State *L, const BCIns *pc) - |3: - | mov BASE, L:RB->base - |4: - | movzx RAd, PC_RA - |5: - | movzx OP, PC_OP - | movzx RDd, PC_RD - | jmp aword [DISPATCH+OP*8+GG_DISP2STATIC] // Re-dispatch to static ins. - | - |->cont_hook: // Continue from hook yield. - | add PC, 4 - | mov RA, [RB-40] - | mov MULTRES, RAd // Restore MULTRES for *M ins. - | jmp <4 - | - |->vm_hotloop: // Hot loop counter underflow. - |.if JIT - | mov LFUNC:RB, [BASE-16] // Same as curr_topL(L). - | cleartp LFUNC:RB - | mov RB, LFUNC:RB->pc - | movzx RDd, 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 CARG2, PC - | lea CARG1, [DISPATCH+GG_DISP2J] - | mov aword [DISPATCH+DISPATCH_J(L)], L:RB - | mov SAVE_PC, PC - | call extern lj_trace_hot // (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 CARG2, PC - | mov CARG1, L:RB - | call extern lj_dispatch_call // (lua_State *L, const BCIns *pc) - | // ASMFunction returned in eax/rax (RD). - | mov SAVE_PC, 0 // Invalidate for subsequent line hook. - |.if JIT - | and PC, -2 - |.endif - | mov BASE, L:RB->base - | mov RA, RD - | mov RD, L:RB->top - | sub RD, BASE - | mov RB, RA - | movzx RAd, PC_RA - | shr RDd, 3 - | add NARGS:RDd, 1 - | jmp RB - | - |->cont_stitch: // Trace stitching. - |.if JIT - | // BASE = base, RC = result, RB = mbase - | mov TRACE:ITYPE, [RB-40] // Save previous trace. - | cleartp TRACE:ITYPE - | mov TMPRd, MULTRES - | movzx RAd, PC_RA - | lea RA, [BASE+RA*8] // Call base. - | sub TMPRd, 1 - | jz >2 - |1: // Move results down. - | mov RB, [RC] - | mov [RA], RB - | add RC, 8 - | add RA, 8 - | sub TMPRd, 1 - | jnz <1 - |2: - | movzx RCd, PC_RA - | movzx RBd, PC_RB - | add RC, RB - | lea RC, [BASE+RC*8-8] - |3: - | cmp RC, RA - | ja >9 // More results wanted? - | - | test TRACE:ITYPE, TRACE:ITYPE - | jz ->cont_nop - | movzx RBd, word TRACE:ITYPE->traceno - | movzx RDd, word TRACE:ITYPE->link - | cmp RDd, RBd - | je ->cont_nop // Blacklisted. - | test RDd, RDd - | 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 CARG2, PC - | lea CARG1, [DISPATCH+GG_DISP2J] - | mov aword [DISPATCH+DISPATCH_J(L)], L:RB - | call extern lj_dispatch_stitch // (jit_State *J, const BCIns *pc) - | mov BASE, L:RB->base - | jmp ->cont_nop - | - |9: // Fill up results with nil. - | mov aword [RA], 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 CARG2, PC // Caveat: CARG2 == BASE - | mov CARG1, L:RB - | call extern lj_dispatch_profile // (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 - | 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 RCd, byte [rbp-8] // Reconstruct exit number. - | mov RCH, byte [rbp-16] - | mov [rbp-8], r15; mov [rbp-16], r14 - | // DISPATCH is preserved on-trace in LJ_GC64 mode. - | mov RAd, [DISPATCH+DISPATCH_GL(vmstate)] // Get trace number. - | set_vmstate EXIT - | mov [DISPATCH+DISPATCH_J(exitno)], RCd - | mov [DISPATCH+DISPATCH_J(parent)], RAd - |.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 - | // Caveat: RB is rbp. - | mov L:RB, [DISPATCH+DISPATCH_GL(cur_L)] - | mov BASE, [DISPATCH+DISPATCH_GL(jit_base)] - | mov aword [DISPATCH+DISPATCH_J(L)], L:RB - | mov L:RB->base, BASE - |.if X64WIN - | lea CARG2, [rsp+4*8] - |.else - | mov CARG2, rsp - |.endif - | lea CARG1, [DISPATCH+GG_DISP2J] - | mov qword [DISPATCH+DISPATCH_GL(jit_base)], 0 - | call extern lj_trace_exit // (jit_State *J, ExitState *ex) - | // MULTRES or negated error code returned in eax (RD). - | mov RA, L:RB->cframe - | and RA, CFRAME_RAWMASK - | mov [RA+CFRAME_OFS_L], L:RB // Set SAVE_L (on-trace resume/yield). - | mov BASE, L:RB->base - | mov PC, [RA+CFRAME_OFS_PC] // Get SAVE_PC. - | jmp >1 - |.endif - |->vm_exit_interp: - | // RD = MULTRES or negated error code, BASE, PC and DISPATCH set. - |.if JIT - | // Restore additional callee-save registers only used in compiled code. - |.if X64WIN - | lea RA, [rsp+10*16+4*8] - |1: - | movdqa xmm15, [RA-10*16] - | movdqa xmm14, [RA-9*16] - | movdqa xmm13, [RA-8*16] - | movdqa xmm12, [RA-7*16] - | movdqa xmm11, [RA-6*16] - | movdqa xmm10, [RA-5*16] - | movdqa xmm9, [RA-4*16] - | movdqa xmm8, [RA-3*16] - | movdqa xmm7, [RA-2*16] - | mov rsp, RA // Reposition stack to C frame. - | movdqa xmm6, [RA-1*16] - | mov r15, CSAVE_1 - | mov r14, CSAVE_2 - | mov r13, CSAVE_3 - | mov r12, CSAVE_4 - |.else - | lea RA, [rsp+16] - |1: - | mov r13, [RA-8] - | mov r12, [RA] - | mov rsp, RA // Reposition stack to C frame. - |.endif - | test RDd, RDd; js >9 // Check for error from exit. - | mov L:RB, SAVE_L - | mov MULTRES, RDd - | mov LFUNC:KBASE, [BASE-16] - | cleartp LFUNC:KBASE - | mov KBASE, LFUNC:KBASE->pc - | mov KBASE, [KBASE+PC2PROTO(k)] - | mov L:RB->base, BASE - | mov qword [DISPATCH+DISPATCH_GL(jit_base)], 0 - | set_vmstate INTERP - | // Modified copy of ins_next which handles function header dispatch, too. - | mov RCd, [PC] - | movzx RAd, RCH - | movzx OP, RCL - | add PC, 4 - | shr RCd, 16 - | cmp OP, BC_FUNCF // Function header? - | jb >3 - | cmp OP, BC_FUNCC+2 // Fast function? - | jae >4 - |2: - | mov RCd, MULTRES // RC/RD holds nres+1. - |3: - | jmp aword [DISPATCH+OP*8] - | - |4: // Check frame below fast function. - | mov RC, [BASE-8] - | test RCd, FRAME_TYPE - | jnz <2 // Trace stitching continuation? - | // Otherwise set KBASE for Lua function below fast function. - | movzx RCd, byte [RC-3] - | neg RC - | mov LFUNC:KBASE, [BASE+RC*8-32] - | cleartp LFUNC:KBASE - | mov KBASE, LFUNC:KBASE->pc - | mov KBASE, [KBASE+PC2PROTO(k)] - | jmp <2 - | - |9: // Rethrow error from the right C frame. - | neg RD - | mov CARG1, L:RB - | mov CARG2, RD - | call extern lj_err_throw // (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: - |->name .. _sse: - | sseconst_abs xmm2, RD - | sseconst_2p52 xmm3, RD - | 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, RD - | 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, RD // Must subtract -1 to preserve -0. - | cmpsd xmm0, xmm1, 6 // x > result? - | .else // floor(x)? - | sseconst_1 xmm2, RD - | 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, RD - | sseconst_2p52 xmm3, RD - | 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, RD - | 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, RD - | divsd xmm1, xmm0 - | movaps xmm0, xmm1 - | ret - |7: - | sseconst_1 xmm0, RD - | ret - | - |//----------------------------------------------------------------------- - |//-- Miscellaneous functions -------------------------------------------- - |//----------------------------------------------------------------------- - | - |// int lj_vm_cpuid(uint32_t f, uint32_t res[4]) - |->vm_cpuid: - | 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 - | - |//----------------------------------------------------------------------- - |//-- 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 - | 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 - | 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 - | mov SAVE_PC, CTSTATE // Any value outside of bytecode is ok. - | mov CARG1, CTSTATE - | call extern lj_ccallback_enter // (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-16] - | cleartp LFUNC:RB - | 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:RA - | mov L:RA->base, BASE - | mov L:RA->top, RB - | mov CARG1, CTSTATE - | mov CARG2, RC - | call extern lj_ccallback_leave // (CTState *cts, TValue *o) - | mov rax, CTSTATE->cb.gpr[0] - | movsd xmm0, qword CTSTATE->cb.fpr[0] - | jmp ->vm_leave_unw - |.endif - | - |->vm_ffi_call: // Call C function via FFI. - | // Caveat: needs special frame unwinding, see below. - |.if FFI - | .type CCSTATE, CCallState, rbx - | push rbp; mov rbp, rsp; push rbx; mov CCSTATE, CARG1 - | - | // Readjust stack. - | mov eax, CCSTATE->spadj - | sub rsp, rax - | - | // Copy stack slots. - | movzx ecx, byte CCSTATE->nsp - | sub ecx, 1 - | js >2 - |1: - | mov rax, [CCSTATE+rcx*8+offsetof(CCallState, stack)] - | mov [rsp+rcx*8+CCALL_SPS_EXTRA*8], rax - | sub ecx, 1 - | jns <1 - |2: - | - | 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: - | - | call aword CCSTATE->func - | - | mov CCSTATE->gpr[0], rax - | movaps CCSTATE->fpr[0], xmm0 - |.if not X64WIN - | mov CCSTATE->gpr[1], rdx - | movaps CCSTATE->fpr[1], xmm1 - |.endif - | - | mov rbx, [rbp-8]; leave; ret - |.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 - | mov ITYPE, [BASE+RA*8] - | mov RB, [BASE+RD*8] - | mov RA, ITYPE - | mov RD, RB - | sar ITYPE, 47 - | sar RB, 47 - |.if DUALNUM - | cmp ITYPEd, LJ_TISNUM; jne >7 - | cmp RBd, LJ_TISNUM; jne >8 - | add PC, 4 - | cmp RAd, RDd - | jmp_comp jge, jl, jg, jle, >9 - |6: - | movzx RDd, PC_RD - | branchPC RD - |9: - | ins_next - | - |7: // RA is not an integer. - | ja ->vmeta_comp - | // RA is a number. - | cmp RBd, LJ_TISNUM; jb >1; jne ->vmeta_comp - | // RA is a number, RD is an integer. - | cvtsi2sd xmm0, RDd - | 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, RAd - | movd xmm0, RD - | jmp >3 - |.else - | cmp ITYPEd, LJ_TISNUM; jae ->vmeta_comp - | cmp RBd, LJ_TISNUM; jae ->vmeta_comp - |.endif - |1: - | movd xmm0, RD - |2: - | movd xmm1, RA - |3: - | add PC, 4 - | ucomisd xmm0, xmm1 - | // 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 RDd, 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] - | mov ITYPE, [BASE+RA*8] - | add PC, 4 - | mov RD, RB - | mov RA, ITYPE - | sar RB, 47 - | sar ITYPE, 47 - |.if DUALNUM - | cmp RBd, LJ_TISNUM; jne >7 - | cmp ITYPEd, LJ_TISNUM; jne >8 - | cmp RDd, RAd - if (vk) { - | jne >9 - } else { - | je >9 - } - | movzx RDd, PC_RD - | branchPC RD - |9: - | ins_next - | - |7: // RD is not an integer. - | ja >5 - | // RD is a number. - | movd xmm1, RD - | cmp ITYPEd, LJ_TISNUM; jb >1; jne >5 - | // RD is a number, RA is an integer. - | cvtsi2sd xmm0, RAd - | jmp >2 - | - |8: // RD is an integer, RA is not an integer. - | ja >5 - | // RD is an integer, RA is a number. - | cvtsi2sd xmm1, RDd - | jmp >1 - | - |.else - | cmp RBd, LJ_TISNUM; jae >5 - | cmp ITYPEd, LJ_TISNUM; jae >5 - | movd xmm1, RD - |.endif - |1: - | movd xmm0, RA - |2: - | ucomisd xmm0, xmm1 - |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 RDd, 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 RDd, 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 RBd, LJ_TCDATA; je ->vmeta_equal_cd - | cmp ITYPEd, LJ_TCDATA; je ->vmeta_equal_cd - |.endif - | cmp RA, RD - | je <1 // Same GCobjs or pvalues? - | cmp RBd, ITYPEd - | jne <2 // Not the same type? - | cmp RBd, LJ_TISTABUD - | ja <2 // Different objects and not table/ud? - | - | // Different tables or userdatas. Need to check __eq metamethod. - | // Field metatable must be at same offset for GCtab and GCudata! - | cleartp TAB:RA - | 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 RBd, RBd // ne = 0 - } else { - | mov RBd, 1 // ne = 1 - } - | jmp ->vmeta_equal // Handle __eq metamethod. - } else { - |.if FFI - |3: - | cmp ITYPEd, 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] - | add PC, 4 - | checkstr RB, >3 - | cmp RB, [KBASE+RD*8] - 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] - | add PC, 4 - |.if DUALNUM - | checkint RB, >7 - | mov RD, [KBASE+RD*8] - | checkint RD, >8 - | cmp RBd, RDd - if (vk) { - | jne >9 - } else { - | je >9 - } - | movzx RDd, PC_RD - | branchPC RD - |9: - | ins_next - | - |7: // RA is not an integer. - | ja >3 - | // RA is a number. - | mov RD, [KBASE+RD*8] - | checkint RD, >1 - | // RA is a number, RD is an integer. - | cvtsi2sd xmm0, RDd - | jmp >2 - | - |8: // RA is an integer, RD is a number. - | cvtsi2sd xmm0, RBd - | movd xmm1, RD - | ucomisd xmm0, xmm1 - | jmp >4 - |1: - | movd xmm0, RD - |.else - | checknum RB, >3 - |1: - | movsd xmm0, qword [KBASE+RD*8] - |.endif - |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] - | sar RB, 47 - | add PC, 4 - | cmp RBd, RDd - if (!LJ_HASFFI) goto iseqne_test; - if (vk) { - | jne >3 - | movzx RDd, PC_RD - | branchPC RD - |2: - | ins_next - |3: - | cmp RBd, LJ_TCDATA; jne <2 - | jmp ->vmeta_equal_cd - } else { - | je >2 - | cmp RBd, LJ_TCDATA; je ->vmeta_equal_cd - | movzx RDd, 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 ITYPE, [BASE+RD*8] - | add PC, 4 - if (op == BC_ISTC || op == BC_ISFC) { - | mov RB, ITYPE - } - | sar ITYPE, 47 - | cmp ITYPEd, 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], RB - } - | movzx RDd, PC_RD - | branchPC RD - |1: // Fallthrough to the next instruction. - | ins_next - break; - - case BC_ISTYPE: - | ins_AD // RA = src, RD = -type - | mov RB, [BASE+RA*8] - | sar RB, 47 - | add RBd, RDd - | jne ->vmeta_istype - | ins_next - break; - case BC_ISNUM: - | ins_AD // RA = src, RD = -(TISNUM-1) - | checknumtp [BASE+RA*8], ->vmeta_istype - | ins_next - break; - - /* -- Unary ops --------------------------------------------------------- */ - - case BC_MOV: - | ins_AD // RA = dst, RD = src - | mov RB, [BASE+RD*8] - | mov [BASE+RA*8], RB - | ins_next_ - break; - case BC_NOT: - | ins_AD // RA = dst, RD = src - | mov RB, [BASE+RD*8] - | sar RB, 47 - | mov RCd, 2 - | cmp RB, LJ_TISTRUECOND - | sbb RCd, 0 - | shl RC, 47 - | not RC - | mov [BASE+RA*8], RC - | ins_next - break; - case BC_UNM: - | ins_AD // RA = dst, RD = src - | mov RB, [BASE+RD*8] - |.if DUALNUM - | checkint RB, >5 - | neg RBd - | jo >4 - | setint RB - |9: - | mov [BASE+RA*8], RB - | ins_next - |4: - | mov64 RB, U64x(41e00000,00000000) // 2^31. - | jmp <9 - |5: - | ja ->vmeta_unm - |.else - | checknum RB, ->vmeta_unm - |.endif - | mov64 RD, U64x(80000000,00000000) - | xor RB, RD - |.if DUALNUM - | jmp <9 - |.else - | mov [BASE+RA*8], RB - | ins_next - |.endif - break; - case BC_LEN: - | ins_AD // RA = dst, RD = src - | mov RD, [BASE+RD*8] - | checkstr RD, >2 - |.if DUALNUM - | mov RDd, dword STR:RD->len - |1: - | setint RD - | mov [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: - | cmp ITYPEd, LJ_TTAB; jne ->vmeta_len - | mov TAB:CARG1, TAB:RD -#if LJ_52 - | mov TAB:RB, TAB:RD->metatable - | cmp TAB:RB, 0 - | jnz >9 - |3: -#endif - |->BC_LEN_Z: - | mov RB, BASE // Save BASE. - | call extern lj_tab_len // (GCtab *t) - | // Length of table returned in eax (RD). - |.if DUALNUM - | // Nothing to do. - |.else - | cvtsi2sd xmm0, RDd - |.endif - | mov BASE, RB // Restore BASE. - | movzx RAd, 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: - | checknumtp [BASE+RB*8], ->vmeta_arith_vn - | .if DUALNUM - | checknumtp [KBASE+RC*8], ->vmeta_arith_vn - | .endif - | movsd xmm0, qword [BASE+RB*8] - | sseins ssereg, qword [KBASE+RC*8] - || break; - ||case 1: - | checknumtp [BASE+RB*8], ->vmeta_arith_nv - | .if DUALNUM - | checknumtp [KBASE+RC*8], ->vmeta_arith_nv - | .endif - | movsd xmm0, qword [KBASE+RC*8] - | sseins ssereg, qword [BASE+RB*8] - || break; - ||default: - | checknumtp [BASE+RB*8], ->vmeta_arith_vv - | checknumtp [BASE+RC*8], ->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: - | mov RB, [BASE+RB*8] - | mov RC, [KBASE+RC*8] - | checkint RB, ->vmeta_arith_vno - | checkint RC, ->vmeta_arith_vno - | intins RBd, RCd; jo ->vmeta_arith_vno - || break; - ||case 1: - | mov RB, [BASE+RB*8] - | mov RC, [KBASE+RC*8] - | checkint RB, ->vmeta_arith_nvo - | checkint RC, ->vmeta_arith_nvo - | intins RCd, RBd; jo ->vmeta_arith_nvo - || break; - ||default: - | mov RB, [BASE+RB*8] - | mov RC, [BASE+RC*8] - | checkint RB, ->vmeta_arith_vvo - | checkint RC, ->vmeta_arith_vvo - | intins RBd, RCd; jo ->vmeta_arith_vvo - || break; - ||} - ||if (vk == 1) { - | setint RC - | mov [BASE+RA*8], RC - ||} else { - | setint RB - | mov [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 - | call extern pow - | movzx RAd, PC_RA - | mov BASE, RB - | ins_arithpost - | ins_next - break; - - case BC_CAT: - | ins_ABC // RA = dst, RB = src_start, RC = src_end - | mov L:CARG1, SAVE_L - | mov L:CARG1->base, BASE - | lea CARG2, [BASE+RC*8] - | mov CARG3d, RCd - | sub CARG3d, RBd - |->BC_CAT_Z: - | mov L:RB, L:CARG1 - | 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 RBd, PC_RB // Copy result to Stk[RA] from Stk[RB]. - | movzx RAd, PC_RA - | mov RC, [BASE+RB*8] - | mov [BASE+RA*8], RC - | ins_next - break; - - /* -- Constant ops ------------------------------------------------------ */ - - case BC_KSTR: - | ins_AND // RA = dst, RD = str const (~) - | mov RD, [KBASE+RD*8] - | settp RD, 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*8] - | settp RD, 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 RDd, RDW - | setint RD - | mov [BASE+RA*8], RD - |.else - | movsx RDd, RDW // Sign-extend literal. - | cvtsi2sd xmm0, RDd - | 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_AD // RA = dst, RD = primitive type (~) - | shl RD, 47 - | not RD - | mov [BASE+RA*8], RD - | ins_next - break; - case BC_KNIL: - | ins_AD // RA = dst_start, RD = dst_end - | lea RA, [BASE+RA*8+8] - | lea RD, [BASE+RD*8] - | 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-16] - | cleartp LFUNC:RB - | mov UPVAL:RB, [LFUNC:RB+RD*8+offsetof(GCfuncL, uvptr)] - | mov RB, UPVAL:RB->v - | mov RD, [RB] - | mov [BASE+RA*8], RD - | 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-16] - | cleartp LFUNC:RB - | mov UPVAL:RB, [LFUNC:RB+RA*8+offsetof(GCfuncL, uvptr)] - | cmp byte UPVAL:RB->closed, 0 - | mov RB, UPVAL:RB->v - | mov RA, [BASE+RD*8] - | mov [RB], RA - | 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. - | mov RD, RA - | sar RD, 47 - | sub RDd, LJ_TISGCV - | cmp RDd, LJ_TNUMX - LJ_TISGCV // tvisgcv(v) - | jbe <1 - | cleartp GCOBJ:RA - | test byte GCOBJ:RA->gch.marked, LJ_GC_WHITES // iswhite(v) - | jz <1 - | // Crossed a write barrier. Move the barrier forward. - |.if not X64WIN - | mov CARG2, RB - | mov RB, BASE // Save BASE. - |.else - | xchg CARG2, RB // Save BASE (CARG2 == BASE). - |.endif - | lea GL:CARG1, [DISPATCH+GG_DISP2G] - | call extern lj_gc_barrieruv // (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-16] - | cleartp LFUNC:RB - | mov UPVAL:RB, [LFUNC:RB+RA*8+offsetof(GCfuncL, uvptr)] - | mov STR:RA, [KBASE+RD*8] - | mov RD, UPVAL:RB->v - | settp STR:ITYPE, STR:RA, LJ_TSTR - | mov [RD], STR:ITYPE - | 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 (CARG2 == BASE). - | mov CARG2, RD - | lea GL:CARG1, [DISPATCH+GG_DISP2G] - | call extern lj_gc_barrieruv // (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-16] - | cleartp LFUNC:RB - | movsd xmm0, qword [KBASE+RD*8] - | mov UPVAL:RB, [LFUNC:RB+RA*8+offsetof(GCfuncL, uvptr)] - | mov RA, UPVAL:RB->v - | movsd qword [RA], xmm0 - | ins_next - break; - case BC_USETP: - | ins_AD // RA = upvalue #, RD = primitive type (~) - | mov LFUNC:RB, [BASE-16] - | cleartp LFUNC:RB - | mov UPVAL:RB, [LFUNC:RB+RA*8+offsetof(GCfuncL, uvptr)] - | shl RD, 47 - | not RD - | mov RA, UPVAL:RB->v - | mov [RA], 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 aword L:RB->openupval, 0 - | je >1 - | mov L:RB->base, BASE - | lea CARG2, [BASE+RA*8] // Caveat: CARG2 == BASE - | mov L:CARG1, L:RB // Caveat: CARG1 == RA - | call extern lj_func_closeuv // (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) - | mov L:RB, SAVE_L - | mov L:RB->base, BASE // Caveat: CARG2/CARG3 may be BASE. - | mov CARG3, [BASE-16] - | cleartp CARG3 - | mov CARG2, [KBASE+RD*8] // Fetch GCproto *. - | mov CARG1, L:RB - | 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 RAd, PC_RA - | settp LFUNC:RC, LJ_TFUNC - | mov [BASE+RA*8], LFUNC:RC - | 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: - | mov CARG3d, RDd - | and RDd, 0x7ff - | shr CARG3d, 11 - | cmp RDd, 0x7ff - | je >3 - |2: - | mov L:CARG1, L:RB - | mov CARG2d, RDd - | 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 RAd, PC_RA - | settp TAB:RC, LJ_TTAB - | mov [BASE+RA*8], TAB:RC - | ins_next - |3: // Turn 0x7ff into 0x801. - | mov RDd, 0x801 - | jmp <2 - |5: - | mov L:CARG1, L:RB - | call extern lj_gc_step_fixtop // (lua_State *L) - | movzx RDd, 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:CARG2, [KBASE+RD*8] // Caveat: CARG2 == BASE - | mov L:CARG1, L:RB // Caveat: CARG1 == RA - | call extern lj_tab_dup // (lua_State *L, Table *kt) - | // Table * returned in eax (RC). - | mov BASE, L:RB->base - | movzx RAd, PC_RA - | settp TAB:RC, LJ_TTAB - | mov [BASE+RA*8], TAB:RC - | ins_next - |3: - | mov L:CARG1, L:RB - | call extern lj_gc_step_fixtop // (lua_State *L) - | movzx RDd, PC_RD // Need to reload RD. - | not RD - | jmp <2 - break; - - case BC_GGET: - | ins_AND // RA = dst, RD = str const (~) - | mov LFUNC:RB, [BASE-16] - | cleartp LFUNC:RB - | mov TAB:RB, LFUNC:RB->env - | mov STR:RC, [KBASE+RD*8] - | jmp ->BC_TGETS_Z - break; - case BC_GSET: - | ins_AND // RA = src, RD = str const (~) - | mov LFUNC:RB, [BASE-16] - | cleartp LFUNC:RB - | mov TAB:RB, LFUNC:RB->env - | mov STR:RC, [KBASE+RD*8] - | jmp ->BC_TSETS_Z - break; - - case BC_TGETV: - | ins_ABC // RA = dst, RB = table, RC = key - | mov TAB:RB, [BASE+RB*8] - | mov RC, [BASE+RC*8] - | checktab TAB:RB, ->vmeta_tgetv - | - | // Integer key? - |.if DUALNUM - | checkint RC, >5 - |.else - | // Convert number to int and back and compare. - | checknum RC, >5 - | movd xmm0, RC - | cvttsd2si RCd, xmm0 - | cvtsi2sd xmm1, RCd - | ucomisd xmm0, xmm1 - | jne ->vmeta_tgetv // Generic numeric key? Use fallback. - |.endif - | cmp RCd, TAB:RB->asize // Takes care of unordered, too. - | jae ->vmeta_tgetv // Not in array part? Use fallback. - | shl RCd, 3 - | add RC, TAB:RB->array - | // Get array slot. - | mov ITYPE, [RC] - | cmp ITYPE, LJ_TNIL // Avoid overwriting RB in fastpath. - | je >2 - |1: - | mov [BASE+RA*8], ITYPE - | ins_next - | - |2: // Check for __index if table value is nil. - | mov TAB:TMPR, TAB:RB->metatable - | test TAB:TMPR, TAB:TMPR - | jz <1 - | test byte TAB:TMPR->nomm, 1<<MM_index - | jz ->vmeta_tgetv // 'no __index' flag NOT set: check. - | jmp <1 - | - |5: // String key? - | cmp ITYPEd, LJ_TSTR; jne ->vmeta_tgetv - | cleartp STR:RC - | jmp ->BC_TGETS_Z - break; - case BC_TGETS: - | ins_ABC // RA = dst, RB = table, RC = str const (~) - | mov TAB:RB, [BASE+RB*8] - | not RC - | mov STR:RC, [KBASE+RC*8] - | checktab TAB:RB, ->vmeta_tgets - |->BC_TGETS_Z: // RB = GCtab *, RC = GCstr * - | mov TMPRd, TAB:RB->hmask - | and TMPRd, STR:RC->hash - | imul TMPRd, #NODE - | add NODE:TMPR, TAB:RB->node - | settp ITYPE, STR:RC, LJ_TSTR - |1: - | cmp NODE:TMPR->key, ITYPE - | jne >4 - | // Get node value. - | mov ITYPE, NODE:TMPR->val - | cmp ITYPE, LJ_TNIL - | je >5 // Key found, but nil value? - |2: - | mov [BASE+RA*8], ITYPE - | ins_next - | - |4: // Follow hash chain. - | mov NODE:TMPR, NODE:TMPR->next - | test NODE:TMPR, NODE:TMPR - | jnz <1 - | // End of hash chain: key not found, nil result. - | mov ITYPE, LJ_TNIL - | - |5: // Check for __index if table value is nil. - | mov TAB:TMPR, TAB:RB->metatable - | test TAB:TMPR, TAB:TMPR - | jz <2 // No metatable: done. - | test byte TAB:TMPR->nomm, 1<<MM_index - | jnz <2 // '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 - | mov TAB:RB, [BASE+RB*8] - | checktab TAB:RB, ->vmeta_tgetb - | cmp RCd, TAB:RB->asize - | jae ->vmeta_tgetb - | shl RCd, 3 - | add RC, TAB:RB->array - | // Get array slot. - | mov ITYPE, [RC] - | cmp ITYPE, LJ_TNIL - | je >2 - |1: - | mov [BASE+RA*8], ITYPE - | ins_next - | - |2: // Check for __index if table value is nil. - | mov TAB:TMPR, TAB:RB->metatable - | test TAB:TMPR, TAB:TMPR - | jz <1 - | test byte TAB:TMPR->nomm, 1<<MM_index - | jz ->vmeta_tgetb // 'no __index' flag NOT set: check. - | jmp <1 - break; - case BC_TGETR: - | ins_ABC // RA = dst, RB = table, RC = key - | mov TAB:RB, [BASE+RB*8] - | cleartp TAB:RB - |.if DUALNUM - | mov RCd, dword [BASE+RC*8] - |.else - | cvttsd2si RCd, qword [BASE+RC*8] - |.endif - | cmp RCd, TAB:RB->asize - | jae ->vmeta_tgetr // Not in array part? Use fallback. - | shl RCd, 3 - | add RC, TAB:RB->array - | // Get array slot. - |->BC_TGETR_Z: - | mov ITYPE, [RC] - |->BC_TGETR2_Z: - | mov [BASE+RA*8], ITYPE - | ins_next - break; - - case BC_TSETV: - | ins_ABC // RA = src, RB = table, RC = key - | mov TAB:RB, [BASE+RB*8] - | mov RC, [BASE+RC*8] - | checktab TAB:RB, ->vmeta_tsetv - | - | // Integer key? - |.if DUALNUM - | checkint RC, >5 - |.else - | // Convert number to int and back and compare. - | checknum RC, >5 - | movd xmm0, RC - | cvttsd2si RCd, xmm0 - | cvtsi2sd xmm1, RCd - | ucomisd xmm0, xmm1 - | jne ->vmeta_tsetv // Generic numeric key? Use fallback. - |.endif - | cmp RCd, TAB:RB->asize // Takes care of unordered, too. - | jae ->vmeta_tsetv - | shl RCd, 3 - | add RC, TAB:RB->array - | cmp aword [RC], 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. - | mov RB, [BASE+RA*8] - | mov [RC], RB - | ins_next - | - |3: // Check for __newindex if previous value is nil. - | mov TAB:TMPR, TAB:RB->metatable - | test TAB:TMPR, TAB:TMPR - | jz <1 - | test byte TAB:TMPR->nomm, 1<<MM_newindex - | jz ->vmeta_tsetv // 'no __newindex' flag NOT set: check. - | jmp <1 - | - |5: // String key? - | cmp ITYPEd, LJ_TSTR; jne ->vmeta_tsetv - | cleartp STR:RC - | jmp ->BC_TSETS_Z - | - |7: // Possible table write barrier for the value. Skip valiswhite check. - | barrierback TAB:RB, TMPR - | jmp <2 - break; - case BC_TSETS: - | ins_ABC // RA = src, RB = table, RC = str const (~) - | mov TAB:RB, [BASE+RB*8] - | not RC - | mov STR:RC, [KBASE+RC*8] - | checktab TAB:RB, ->vmeta_tsets - |->BC_TSETS_Z: // RB = GCtab *, RC = GCstr * - | mov TMPRd, TAB:RB->hmask - | and TMPRd, STR:RC->hash - | imul TMPRd, #NODE - | mov byte TAB:RB->nomm, 0 // Clear metamethod cache. - | add NODE:TMPR, TAB:RB->node - | settp ITYPE, STR:RC, LJ_TSTR - |1: - | cmp NODE:TMPR->key, ITYPE - | jne >5 - | // Ok, key found. Assumes: offsetof(Node, val) == 0 - | cmp aword [TMPR], 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. - | mov ITYPE, [BASE+RA*8] - | mov [TMPR], ITYPE - | ins_next - | - |4: // Check for __newindex if previous value is nil. - | mov TAB:ITYPE, TAB:RB->metatable - | test TAB:ITYPE, TAB:ITYPE - | jz <2 - | test byte TAB:ITYPE->nomm, 1<<MM_newindex - | jz ->vmeta_tsets // 'no __newindex' flag NOT set: check. - | jmp <2 - | - |5: // Follow hash chain. - | mov NODE:TMPR, NODE:TMPR->next - | test NODE:TMPR, NODE:TMPR - | jnz <1 - | // End of hash chain: key not found, add a new one. - | - | // But check for __newindex first. - | mov TAB:TMPR, TAB:RB->metatable - | test TAB:TMPR, TAB:TMPR - | jz >6 // No metatable: continue. - | test byte TAB:TMPR->nomm, 1<<MM_newindex - | jz ->vmeta_tsets // 'no __newindex' flag NOT set: check. - |6: - | mov TMP1, ITYPE - | mov L:CARG1, SAVE_L - | mov L:CARG1->base, BASE - | lea CARG3, TMP1 - | mov CARG2, TAB:RB - | 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 L:CARG1, SAVE_L - | mov BASE, L:CARG1->base - | mov TMPR, rax - | movzx RAd, PC_RA - | jmp <2 // Must check write barrier for value. - | - |7: // Possible table write barrier for the value. Skip valiswhite check. - | barrierback TAB:RB, ITYPE - | jmp <3 - break; - case BC_TSETB: - | ins_ABC // RA = src, RB = table, RC = byte literal - | mov TAB:RB, [BASE+RB*8] - | checktab TAB:RB, ->vmeta_tsetb - | cmp RCd, TAB:RB->asize - | jae ->vmeta_tsetb - | shl RCd, 3 - | add RC, TAB:RB->array - | cmp aword [RC], 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. - | mov ITYPE, [BASE+RA*8] - | mov [RC], ITYPE - | ins_next - | - |3: // Check for __newindex if previous value is nil. - | mov TAB:TMPR, TAB:RB->metatable - | test TAB:TMPR, TAB:TMPR - | jz <1 - | test byte TAB:TMPR->nomm, 1<<MM_newindex - | jz ->vmeta_tsetb // 'no __newindex' flag NOT set: check. - | jmp <1 - | - |7: // Possible table write barrier for the value. Skip valiswhite check. - | barrierback TAB:RB, TMPR - | jmp <2 - break; - case BC_TSETR: - | ins_ABC // RA = src, RB = table, RC = key - | mov TAB:RB, [BASE+RB*8] - | cleartp TAB:RB - |.if DUALNUM - | mov RC, [BASE+RC*8] - |.else - | cvttsd2si RCd, qword [BASE+RC*8] - |.endif - | test byte TAB:RB->marked, LJ_GC_BLACK // isblack(table) - | jnz >7 - |2: - | cmp RCd, TAB:RB->asize - | jae ->vmeta_tsetr - | shl RCd, 3 - | add RC, TAB:RB->array - | // Set array slot. - |->BC_TSETR_Z: - | mov ITYPE, [BASE+RA*8] - | mov [RC], ITYPE - | ins_next - | - |7: // Possible table write barrier for the value. Skip valiswhite check. - | barrierback TAB:RB, TMPR - | jmp <2 - break; - - case BC_TSETM: - | ins_AD // RA = base (table at base-1), RD = num const (start index) - |1: - | mov TMPRd, dword [KBASE+RD*8] // Integer constant is in lo-word. - | lea RA, [BASE+RA*8] - | mov TAB:RB, [RA-8] // Guaranteed to be a table. - | cleartp TAB:RB - | test byte TAB:RB->marked, LJ_GC_BLACK // isblack(table) - | jnz >7 - |2: - | mov RDd, MULTRES - | sub RDd, 1 - | jz >4 // Nothing to copy? - | add RDd, TMPRd // Compute needed size. - | cmp RDd, TAB:RB->asize - | ja >5 // Doesn't fit into array part? - | sub RDd, TMPRd - | shl TMPRd, 3 - | add TMPR, TAB:RB->array - |3: // Copy result slots to table. - | mov RB, [RA] - | add RA, 8 - | mov [TMPR], RB - | add TMPR, 8 - | sub RDd, 1 - | jnz <3 - |4: - | ins_next - | - |5: // Need to resize array part. - | mov L:CARG1, SAVE_L - | mov L:CARG1->base, BASE // Caveat: CARG2/CARG3 may be BASE. - | mov CARG2, TAB:RB - | mov CARG3d, RDd - | mov L:RB, L:CARG1 - | mov SAVE_PC, PC - | call extern lj_tab_reasize // (lua_State *L, GCtab *t, int nasize) - | mov BASE, L:RB->base - | movzx RAd, PC_RA // Restore RA. - | movzx RDd, PC_RD // Restore RD. - | 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:RDd, MULTRES - } - | mov LFUNC:RB, [BASE+RA*8] - | checkfunc LFUNC:RB, ->vmeta_call_ra - | lea BASE, [BASE+RA*8+16] - | ins_call - break; - - case BC_CALLMT: - | ins_AD // RA = base, RD = extra_nargs - | add NARGS:RDd, 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+16] - | mov KBASE, BASE // Use KBASE for move + vmeta_call hint. - | mov LFUNC:RB, [RA-16] - | checktp_nc LFUNC:RB, LJ_TFUNC, ->vmeta_call - |->BC_CALLT_Z: - | mov PC, [BASE-8] - | test PCd, FRAME_TYPE - | jnz >7 - |1: - | mov [BASE-16], LFUNC:RB // Copy func+tag down, reloaded below. - | mov MULTRES, NARGS:RDd - | sub NARGS:RDd, 1 - | jz >3 - |2: // Move args down. - | mov RB, [RA] - | add RA, 8 - | mov [KBASE], RB - | add KBASE, 8 - | sub NARGS:RDd, 1 - | jnz <2 - | - | mov LFUNC:RB, [BASE-16] - |3: - | cleartp LFUNC:RB - | mov NARGS:RDd, 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 PCd, FRAME_TYPE // Lua frame below? - | jnz <4 - | movzx RAd, PC_RA - | neg RA - | mov LFUNC:KBASE, [BASE+RA*8-32] // Need to prepare KBASE. - | cleartp LFUNC:KBASE - | mov KBASE, LFUNC:KBASE->pc - | mov KBASE, [KBASE+PC2PROTO(k)] - | jmp <4 - | - |7: // Tailcall from a vararg function. - | sub PC, FRAME_VARG - | test PCd, FRAME_TYPEP - | jnz >8 // Vararg frame below? - | sub BASE, PC // Need to relocate BASE/KBASE down. - | mov KBASE, BASE - | mov PC, [BASE-8] - | jmp <1 - |8: - | add PCd, 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+16] // fb = base+2 - | mov RB, [RA-32] // Copy state. fb[0] = fb[-4]. - | mov RC, [RA-24] // Copy control var. fb[1] = fb[-3]. - | mov [RA], RB - | mov [RA+8], RC - | mov LFUNC:RB, [RA-40] // Copy callable. fb[-2] = fb[-5] - | mov [RA-16], LFUNC:RB - | mov NARGS:RDd, 2+1 // Handle like a regular 2-arg call. - | checkfunc LFUNC:RB, ->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 TAB:RB, [BASE+RA*8-16] - | cleartp TAB:RB - | mov RCd, [BASE+RA*8-8] // Get index from control var. - | mov TMPRd, TAB:RB->asize - | add PC, 4 - | mov ITYPE, TAB:RB->array - |1: // Traverse array part. - | cmp RCd, TMPRd; jae >5 // Index points after array part? - | cmp aword [ITYPE+RC*8], LJ_TNIL; je >4 - |.if not DUALNUM - | cvtsi2sd xmm0, RCd - |.endif - | // Copy array slot to returned value. - | mov RB, [ITYPE+RC*8] - | mov [BASE+RA*8+8], RB - | // Return array index as a numeric key. - |.if DUALNUM - | setint ITYPE, RC - | mov [BASE+RA*8], ITYPE - |.else - | movsd qword [BASE+RA*8], xmm0 - |.endif - | add RCd, 1 - | mov [BASE+RA*8-8], RCd // Update control var. - |2: - | movzx RDd, PC_RD // Get target from ITERL. - | branchPC RD - |3: - | ins_next - | - |4: // Skip holes in array part. - | add RCd, 1 - | jmp <1 - | - |5: // Traverse hash part. - | sub RCd, TMPRd - |6: - | cmp RCd, TAB:RB->hmask; ja <3 // End of iteration? Branch to ITERL+1. - | imul ITYPEd, RCd, #NODE - | add NODE:ITYPE, TAB:RB->node - | cmp aword NODE:ITYPE->val, LJ_TNIL; je >7 - | lea TMPRd, [RCd+TMPRd+1] - | // Copy key and value from hash slot. - | mov RB, NODE:ITYPE->key - | mov RC, NODE:ITYPE->val - | mov [BASE+RA*8], RB - | mov [BASE+RA*8+8], RC - | mov [BASE+RA*8-8], TMPRd - | jmp <2 - | - |7: // Skip holes in hash part. - | add RCd, 1 - | jmp <6 - break; - - case BC_ISNEXT: - | ins_AD // RA = base, RD = target (points to ITERN) - | mov CFUNC:RB, [BASE+RA*8-24] - | checkfunc CFUNC:RB, >5 - | checktptp [BASE+RA*8-16], LJ_TTAB, >5 - | cmp aword [BASE+RA*8-8], LJ_TNIL; jne >5 - | cmp byte CFUNC:RB->ffid, FF_next_N; jne >5 - | branchPC RD - | mov64 TMPR, U64x(fffe7fff, 00000000) - | mov [BASE+RA*8-8], TMPR // Initialize control var. - |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 - | lea TMPR, [BASE+RC*8+(16+FRAME_VARG)] - | lea RA, [BASE+RA*8] - | sub TMPR, [BASE-8] - | // Note: TMPR 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 TMPR, BASE // No vararg slots? - | jnb >2 - |1: // Copy vararg slots to destination slots. - | mov RC, [TMPR-16] - | add TMPR, 8 - | mov [RA], RC - | add RA, 8 - | cmp RA, RB // All destination slots filled? - | jnb >3 - | cmp TMPR, BASE // No more vararg slots? - | jb <1 - |2: // Fill up remainder with nil. - | mov aword [RA], LJ_TNIL - | add RA, 8 - | cmp RA, RB - | jb <2 - |3: - | ins_next - | - |5: // Copy all varargs. - | mov MULTRES, 1 // MULTRES = 0+1 - | mov RC, BASE - | sub RC, TMPR - | jbe <3 // No vararg slots? - | mov RBd, RCd - | shr RBd, 3 - | add RBd, 1 - | mov MULTRES, RBd // 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. - | mov RC, [TMPR-16] - | add TMPR, 8 - | mov [RA], RC - | add RA, 8 - | cmp TMPR, 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 TMPR, BASE // Need delta, because BASE may change. - | mov TMP1hi, TMPRd - | mov CARG2d, MULTRES - | sub CARG2d, 1 - | mov CARG1, L:RB - | call extern lj_state_growstack // (lua_State *L, int n) - | mov BASE, L:RB->base - | movsxd TMPR, TMP1hi - | mov RA, L:RB->top - | add TMPR, BASE - | jmp <6 - break; - - /* -- Returns ----------------------------------------------------------- */ - - case BC_RETM: - | ins_AD // RA = results, RD = extra_nresults - | add RDd, 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 RAd, 3 - } - |1: - | mov PC, [BASE-8] - | mov MULTRES, RDd // Save nresults+1. - | test PCd, 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 RDd, 1 - | jz >3 - |2: // Move results down. - | mov RB, [KBASE+RA] - | mov [KBASE-16], RB - | add KBASE, 8 - | sub RDd, 1 - | jnz <2 - |3: - | mov RDd, MULTRES // Note: MULTRES may be >255. - | movzx RBd, PC_RB // So cannot compare with RDL! - |5: - | cmp RBd, RDd // More results expected? - | ja >6 - break; - case BC_RET1: - | mov RB, [BASE+RA] - | mov [BASE-16], RB - /* fallthrough */ - case BC_RET0: - |5: - | cmp PC_RB, RDL // More results expected? - | ja >6 - default: - break; - } - | movzx RAd, PC_RA - | neg RA - | lea BASE, [BASE+RA*8-16] // base = base - (RA+2)*8 - | mov LFUNC:KBASE, [BASE-16] - | cleartp LFUNC:KBASE - | mov KBASE, LFUNC:KBASE->pc - | mov KBASE, [KBASE+PC2PROTO(k)] - | ins_next - | - |6: // Fill up results with nil. - if (op == BC_RET) { - | mov aword [KBASE-16], LJ_TNIL // Note: relies on shifted base. - | add KBASE, 8 - } else { - | mov aword [BASE+RD*8-24], LJ_TNIL - } - | add RD, 1 - | jmp <5 - | - |7: // Non-standard return case. - | lea RB, [PC-FRAME_VARG] - | test RBd, 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_STOP, [RA+8] - |.define FOR_STEP, [RA+16] - |.define FOR_EXT, [RA+24] - - case BC_FORL: - |.if JIT - | hotloop RBd - |.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) { - | mov RB, FOR_IDX - | checkint RB, >9 - | mov TMPR, FOR_STOP - if (!vk) { - | checkint TMPR, ->vmeta_for - | mov ITYPE, FOR_STEP - | test ITYPEd, ITYPEd; js >5 - | sar ITYPE, 47; - | cmp ITYPEd, LJ_TISNUM; jne ->vmeta_for - } else { -#ifdef LUA_USE_ASSERT - | checkinttp FOR_STOP, ->assert_bad_for_arg_type - | checkinttp FOR_STEP, ->assert_bad_for_arg_type -#endif - | mov ITYPE, FOR_STEP - | test ITYPEd, ITYPEd; js >5 - | add RBd, ITYPEd; jo >1 - | setint RB - | mov FOR_IDX, RB - } - | cmp RBd, TMPRd - | mov FOR_EXT, RB - if (op == BC_FORI) { - | jle >7 - |1: - |6: - | branchPC RD - } else if (op == BC_JFORI) { - | branchPC RD - | movzx RDd, 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) { - | sar ITYPE, 47; - | cmp ITYPEd, LJ_TISNUM; jne ->vmeta_for - } else { - | add RBd, ITYPEd; jo <1 - | setint RB - | mov FOR_IDX, RB - } - | cmp RBd, TMPRd - | mov FOR_EXT, RB - if (op == BC_FORI) { - | jge <7 - } else if (op == BC_JFORI) { - | branchPC RD - | movzx RDd, PC_RD - | jge =>BC_JLOOP - } else if (op == BC_IFORL) { - | jl <7 - } else { - | jge =>BC_JLOOP - } - | jmp <6 - |9: // Fallback to FP variant. - if (!vk) { - | jae ->vmeta_for - } - } else if (!vk) { - | checknumtp FOR_IDX, ->vmeta_for - } - if (!vk) { - | checknumtp FOR_STOP, ->vmeta_for - } else { -#ifdef LUA_USE_ASSERT - | checknumtp FOR_STOP, ->assert_bad_for_arg_type - | checknumtp FOR_STEP, ->assert_bad_for_arg_type -#endif - } - | mov RB, FOR_STEP - if (!vk) { - | checknum RB, ->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 RDd, 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 RBd - |.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] - | cmp RB, LJ_TNIL; je >1 // Stop if iterator returned nil. - if (op == BC_JITERL) { - | mov [RA-8], RB - | jmp =>BC_JLOOP - } else { - | branchPC RD // Otherwise save control var + branch. - | mov [RA-8], RB - } - |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 RBd - |.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*8] - | mov RD, 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 CSAVE_4, r12 - | mov CSAVE_3, r13 - | mov CSAVE_2, r14 - | mov CSAVE_1, r15 - | mov RA, rsp - | sub rsp, 10*16+4*8 - | movdqa [RA-1*16], xmm6 - | movdqa [RA-2*16], xmm7 - | movdqa [RA-3*16], xmm8 - | movdqa [RA-4*16], xmm9 - | movdqa [RA-5*16], xmm10 - | movdqa [RA-6*16], xmm11 - | movdqa [RA-7*16], xmm12 - | movdqa [RA-8*16], xmm13 - | movdqa [RA-9*16], xmm14 - | movdqa [RA-10*16], xmm15 - |.else - | sub rsp, 16 - | mov [rsp+16], r12 - | mov [rsp+8], r13 - |.endif - | jmp RD - |.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 RBd - |.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 RAd, byte [PC-4+PC2PROTO(numparams)] - | cmp NARGS:RDd, RAd // Check for missing parameters. - | jbe >3 - |2: - if (op == BC_JFUNCF) { - | movzx RDd, PC_RD - | jmp =>BC_JLOOP - } else { - | ins_next - } - | - |3: // Clear missing parameters. - | mov aword [BASE+NARGS:RD*8-8], LJ_TNIL - | add NARGS:RDd, 1 - | cmp NARGS:RDd, RAd - | 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 RBd, [NARGS:RD*8+FRAME_VARG+8] - | lea RD, [BASE+NARGS:RD*8+8] - | mov LFUNC:KBASE, [BASE-16] - | mov [RD-8], RB // Store delta + FRAME_VARG. - | mov [RD-16], 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 RBd, byte [PC-4+PC2PROTO(numparams)] - | test RBd, RBd - | jz >2 - | add RA, 8 - |1: // Copy fixarg slots up to new frame. - | add RA, 8 - | cmp RA, BASE - | jnb >3 // Less args than parameters? - | mov KBASE, [RA-16] - | mov [RD], KBASE - | add RD, 8 - | mov aword [RA-16], LJ_TNIL // Clear old fixarg slot (help the GC). - | sub RBd, 1 - | jnz <1 - |2: - if (op == BC_JFUNCV) { - | movzx RDd, PC_RD - | jmp =>BC_JLOOP - } else { - | mov KBASE, [PC-4+PC2PROTO(k)] - | ins_next - } - | - |3: // Clear missing parameters. - | mov aword [RD], LJ_TNIL - | add RD, 8 - | sub RBd, 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-16] - | cleartp CFUNC:RB - | mov KBASE, 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) { - | mov CARG1, L:RB // Caveat: CARG1 may be RA. - } else { - | mov CARG2, KBASE - | mov CARG1, L:RB // Caveat: CARG1 may be RA. - } - | ja ->vm_growstack_c // Need to grow stack. - | set_vmstate C - if (op == BC_FUNCC) { - | call KBASE // (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-8] // 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); - 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 -8\n" - "\t.byte 0x10\n" - "\t.byte 0xc\n\t.uleb128 0x7\n\t.uleb128 8\n" - "\t.byte 0x80+0x10\n\t.uleb128 0x1\n" - "\t.align 8\n" - ".LECIE0:\n\n"); - fprintf(ctx->fp, - ".LSFDE0:\n" - "\t.long .LEFDE0-.LASFDE0\n" - ".LASFDE0:\n" - "\t.long .Lframe0\n" - "\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 - "\t.align 8\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" - "\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 */ - "\t.align 8\n" - ".LEFDE1:\n\n", (int)ctx->codesz - fcofs); -#endif -#if !LJ_NO_UNWIND -#if (defined(__sun__) && defined(__svr4__)) - fprintf(ctx->fp, "\t.section .eh_frame,\"a\",@unwind\n"); -#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 -8\n" - "\t.byte 0x10\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 0x7\n\t.uleb128 8\n" - "\t.byte 0x80+0x10\n\t.uleb128 0x1\n" - "\t.align 8\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 */ - "\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 */ - "\t.align 8\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 -8\n" - "\t.byte 0x10\n" - "\t.uleb128 1\n" /* augmentation length */ - "\t.byte 0x1b\n" /* pcrel|sdata4 */ - "\t.byte 0xc\n\t.uleb128 0x7\n\t.uleb128 8\n" - "\t.byte 0x80+0x10\n\t.uleb128 0x1\n" - "\t.align 8\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 */ - "\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 */ - "\t.align 8\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 128-8\n" - "\t.byte 0x10\n" - "\t.byte 6\n" /* augmentation length */ - "\t.byte 0x9b\n" /* indirect|pcrel|sdata4 */ - "\t.long _lj_err_unwind_dwarf+4@GOTPCREL\n" - "\t.byte 0x1b\n" /* pcrel|sdata4 */ - "\t.byte 0xc\n\t.byte 0x7\n\t.byte 8\n" - "\t.byte 0x80+0x10\n\t.byte 0x1\n" - "\t.align 3\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 */ - "\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 */ - "\t.align 3\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 128-8\n" - "\t.byte 0x10\n" - "\t.byte 1\n" /* augmentation length */ - "\t.byte 0x1b\n" /* pcrel|sdata4 */ - "\t.byte 0xc\n\t.byte 0x7\n\t.byte 8\n" - "\t.byte 0x80+0x10\n\t.byte 0x1\n" - "\t.align 3\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 */ - "\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 */ - "\t.align 3\n" - "LEFDEY:\n\n", fcsize); - } -#endif - fprintf(ctx->fp, ".subsections_via_symbols\n"); - } - break; -#endif - default: /* Difficult for other modes. */ - break; - } -} - |