diff options
Diffstat (limited to 'lib/LuaJIT/src/vm_mips64.dasc')
| -rw-r--r-- | lib/LuaJIT/src/vm_mips64.dasc | 5112 |
1 files changed, 0 insertions, 5112 deletions
diff --git a/lib/LuaJIT/src/vm_mips64.dasc b/lib/LuaJIT/src/vm_mips64.dasc deleted file mode 100644 index 1682c81..0000000 --- a/lib/LuaJIT/src/vm_mips64.dasc +++ /dev/null @@ -1,5112 +0,0 @@ -|// Low-level VM code for MIPS64 CPUs. -|// Bytecode interpreter, fast functions and helper functions. -|// Copyright (C) 2005-2017 Mike Pall. See Copyright Notice in luajit.h -|// -|// Contributed by Djordje Kovacevic and Stefan Pejic from RT-RK.com. -|// Sponsored by Cisco Systems, Inc. -| -|.arch mips64 -|.section code_op, code_sub -| -|.actionlist build_actionlist -|.globals GLOB_ -|.globalnames globnames -|.externnames extnames -| -|// Note: The ragged indentation of the instructions is intentional. -|// The starting columns indicate data dependencies. -| -|//----------------------------------------------------------------------- -| -|// Fixed register assignments for the interpreter. -|// Don't use: r0 = 0, r26/r27 = reserved, r28 = gp, r29 = sp, r31 = ra -| -|.macro .FPU, a, b -|.if FPU -| a, b -|.endif -|.endmacro -| -|// The following must be C callee-save (but BASE is often refetched). -|.define BASE, r16 // Base of current Lua stack frame. -|.define KBASE, r17 // Constants of current Lua function. -|.define PC, r18 // Next PC. -|.define DISPATCH, r19 // Opcode dispatch table. -|.define LREG, r20 // Register holding lua_State (also in SAVE_L). -|.define MULTRES, r21 // Size of multi-result: (nresults+1)*8. -| -|.define JGL, r30 // On-trace: global_State + 32768. -| -|// Constants for type-comparisons, stores and conversions. C callee-save. -|.define TISNIL, r30 -|.define TISNUM, r22 -|.if FPU -|.define TOBIT, f30 // 2^52 + 2^51. -|.endif -| -|// The following temporaries are not saved across C calls, except for RA. -|.define RA, r23 // Callee-save. -|.define RB, r8 -|.define RC, r9 -|.define RD, r10 -|.define INS, r11 -| -|.define AT, r1 // Assembler temporary. -|.define TMP0, r12 -|.define TMP1, r13 -|.define TMP2, r14 -|.define TMP3, r15 -| -|// MIPS n64 calling convention. -|.define CFUNCADDR, r25 -|.define CARG1, r4 -|.define CARG2, r5 -|.define CARG3, r6 -|.define CARG4, r7 -|.define CARG5, r8 -|.define CARG6, r9 -|.define CARG7, r10 -|.define CARG8, r11 -| -|.define CRET1, r2 -|.define CRET2, r3 -| -|.if FPU -|.define FARG1, f12 -|.define FARG2, f13 -|.define FARG3, f14 -|.define FARG4, f15 -|.define FARG5, f16 -|.define FARG6, f17 -|.define FARG7, f18 -|.define FARG8, f19 -| -|.define FRET1, f0 -|.define FRET2, f2 -|.endif -| -|// Stack layout while in interpreter. Must match with lj_frame.h. -|.if FPU // MIPS64 hard-float. -| -|.define CFRAME_SPACE, 192 // Delta for sp. -| -|//----- 16 byte aligned, <-- sp entering interpreter -|.define SAVE_ERRF, 188(sp) // 32 bit values. -|.define SAVE_NRES, 184(sp) -|.define SAVE_CFRAME, 176(sp) // 64 bit values. -|.define SAVE_L, 168(sp) -|.define SAVE_PC, 160(sp) -|//----- 16 byte aligned -|.define SAVE_GPR_, 80 // .. 80+10*8: 64 bit GPR saves. -|.define SAVE_FPR_, 16 // .. 16+8*8: 64 bit FPR saves. -| -|.else // MIPS64 soft-float -| -|.define CFRAME_SPACE, 128 // Delta for sp. -| -|//----- 16 byte aligned, <-- sp entering interpreter -|.define SAVE_ERRF, 124(sp) // 32 bit values. -|.define SAVE_NRES, 120(sp) -|.define SAVE_CFRAME, 112(sp) // 64 bit values. -|.define SAVE_L, 104(sp) -|.define SAVE_PC, 96(sp) -|//----- 16 byte aligned -|.define SAVE_GPR_, 16 // .. 16+10*8: 64 bit GPR saves. -| -|.endif -| -|.define TMPX, 8(sp) // Unused by interpreter, temp for JIT code. -|.define TMPD, 0(sp) -|//----- 16 byte aligned -| -|.define TMPD_OFS, 0 -| -|.define SAVE_MULTRES, TMPD -| -|//----------------------------------------------------------------------- -| -|.macro saveregs -| daddiu sp, sp, -CFRAME_SPACE -| sd ra, SAVE_GPR_+9*8(sp) -| sd r30, SAVE_GPR_+8*8(sp) -| .FPU sdc1 f31, SAVE_FPR_+7*8(sp) -| sd r23, SAVE_GPR_+7*8(sp) -| .FPU sdc1 f30, SAVE_FPR_+6*8(sp) -| sd r22, SAVE_GPR_+6*8(sp) -| .FPU sdc1 f29, SAVE_FPR_+5*8(sp) -| sd r21, SAVE_GPR_+5*8(sp) -| .FPU sdc1 f28, SAVE_FPR_+4*8(sp) -| sd r20, SAVE_GPR_+4*8(sp) -| .FPU sdc1 f27, SAVE_FPR_+3*8(sp) -| sd r19, SAVE_GPR_+3*8(sp) -| .FPU sdc1 f26, SAVE_FPR_+2*8(sp) -| sd r18, SAVE_GPR_+2*8(sp) -| .FPU sdc1 f25, SAVE_FPR_+1*8(sp) -| sd r17, SAVE_GPR_+1*8(sp) -| .FPU sdc1 f24, SAVE_FPR_+0*8(sp) -| sd r16, SAVE_GPR_+0*8(sp) -|.endmacro -| -|.macro restoreregs_ret -| ld ra, SAVE_GPR_+9*8(sp) -| ld r30, SAVE_GPR_+8*8(sp) -| ld r23, SAVE_GPR_+7*8(sp) -| .FPU ldc1 f31, SAVE_FPR_+7*8(sp) -| ld r22, SAVE_GPR_+6*8(sp) -| .FPU ldc1 f30, SAVE_FPR_+6*8(sp) -| ld r21, SAVE_GPR_+5*8(sp) -| .FPU ldc1 f29, SAVE_FPR_+5*8(sp) -| ld r20, SAVE_GPR_+4*8(sp) -| .FPU ldc1 f28, SAVE_FPR_+4*8(sp) -| ld r19, SAVE_GPR_+3*8(sp) -| .FPU ldc1 f27, SAVE_FPR_+3*8(sp) -| ld r18, SAVE_GPR_+2*8(sp) -| .FPU ldc1 f26, SAVE_FPR_+2*8(sp) -| ld r17, SAVE_GPR_+1*8(sp) -| .FPU ldc1 f25, SAVE_FPR_+1*8(sp) -| ld r16, SAVE_GPR_+0*8(sp) -| .FPU ldc1 f24, SAVE_FPR_+0*8(sp) -| jr ra -| daddiu sp, sp, CFRAME_SPACE -|.endmacro -| -|// Type definitions. Some of these are only used for documentation. -|.type L, lua_State, LREG -|.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 NARGS8, int -|.type TRACE, GCtrace -|.type SBUF, SBuf -| -|//----------------------------------------------------------------------- -| -|// Trap for not-yet-implemented parts. -|.macro NYI; .long 0xf0f0f0f0; .endmacro -| -|// Macros to mark delay slots. -|.macro ., a; a; .endmacro -|.macro ., a,b; a,b; .endmacro -|.macro ., a,b,c; a,b,c; .endmacro -|.macro ., a,b,c,d; a,b,c,d; .endmacro -| -|.define FRAME_PC, -8 -|.define FRAME_FUNC, -16 -| -|//----------------------------------------------------------------------- -| -|// Endian-specific defines. -|.if ENDIAN_LE -|.define HI, 4 -|.define LO, 0 -|.define OFS_RD, 2 -|.define OFS_RA, 1 -|.define OFS_OP, 0 -|.else -|.define HI, 0 -|.define LO, 4 -|.define OFS_RD, 0 -|.define OFS_RA, 2 -|.define OFS_OP, 3 -|.endif -| -|// Instruction decode. -|.macro decode_OP1, dst, ins; andi dst, ins, 0xff; .endmacro -|.macro decode_OP8a, dst, ins; andi dst, ins, 0xff; .endmacro -|.macro decode_OP8b, dst; sll dst, dst, 3; .endmacro -|.macro decode_RC8a, dst, ins; srl dst, ins, 13; .endmacro -|.macro decode_RC8b, dst; andi dst, dst, 0x7f8; .endmacro -|.macro decode_RD4b, dst; sll dst, dst, 2; .endmacro -|.macro decode_RA8a, dst, ins; srl dst, ins, 5; .endmacro -|.macro decode_RA8b, dst; andi dst, dst, 0x7f8; .endmacro -|.macro decode_RB8a, dst, ins; srl dst, ins, 21; .endmacro -|.macro decode_RB8b, dst; andi dst, dst, 0x7f8; .endmacro -|.macro decode_RD8a, dst, ins; srl dst, ins, 16; .endmacro -|.macro decode_RD8b, dst; sll dst, dst, 3; .endmacro -|.macro decode_RDtoRC8, dst, src; andi dst, src, 0x7f8; .endmacro -| -|// Instruction fetch. -|.macro ins_NEXT1 -| lw INS, 0(PC) -| daddiu PC, PC, 4 -|.endmacro -|// Instruction decode+dispatch. -|.macro ins_NEXT2 -| decode_OP8a TMP1, INS -| decode_OP8b TMP1 -| daddu TMP0, DISPATCH, TMP1 -| decode_RD8a RD, INS -| ld AT, 0(TMP0) -| decode_RA8a RA, INS -| decode_RD8b RD -| jr AT -| decode_RA8b RA -|.endmacro -|.macro ins_NEXT -| ins_NEXT1 -| ins_NEXT2 -|.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 -| .define ins_next1, ins_NEXT1 -| .define ins_next2, ins_NEXT2 -|.else -| // Common dispatch. Lower I-Cache use, only one (very) unpredictable branch. -| // Affects only certain kinds of benchmarks (and only with -j off). -| .macro ins_next -| b ->ins_next -| .endmacro -| .macro ins_next1 -| .endmacro -| .macro ins_next2 -| b ->ins_next -| .endmacro -| .macro ins_next_ -| ->ins_next: -| ins_NEXT -| .endmacro -|.endif -| -|// Call decode and dispatch. -|.macro ins_callt -| // BASE = new base, RB = LFUNC/CFUNC, RC = nargs*8, FRAME_PC(BASE) = PC -| ld PC, LFUNC:RB->pc -| lw INS, 0(PC) -| daddiu PC, PC, 4 -| decode_OP8a TMP1, INS -| decode_RA8a RA, INS -| decode_OP8b TMP1 -| decode_RA8b RA -| daddu TMP0, DISPATCH, TMP1 -| ld TMP0, 0(TMP0) -| jr TMP0 -| daddu RA, RA, BASE -|.endmacro -| -|.macro ins_call -| // BASE = new base, RB = LFUNC/CFUNC, RC = nargs*8, PC = caller PC -| sd PC, FRAME_PC(BASE) -| ins_callt -|.endmacro -| -|//----------------------------------------------------------------------- -| -|.macro branch_RD -| srl TMP0, RD, 1 -| lui AT, (-(BCBIAS_J*4 >> 16) & 65535) -| addu TMP0, TMP0, AT -| daddu PC, PC, TMP0 -|.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 GG_DISP2GOT (GG_OFS(got) - GG_OFS(dispatch)) -#define DISPATCH_GOT(name) (GG_DISP2GOT + sizeof(void*)*LJ_GOT_##name) -| -#define PC2PROTO(field) ((int)offsetof(GCproto, field)-(int)sizeof(GCproto)) -| -|.macro load_got, func -| ld CFUNCADDR, DISPATCH_GOT(func)(DISPATCH) -|.endmacro -|// Much faster. Sadly, there's no easy way to force the required code layout. -|// .macro call_intern, func; bal extern func; .endmacro -|.macro call_intern, func; jalr CFUNCADDR; .endmacro -|.macro call_extern; jalr CFUNCADDR; .endmacro -|.macro jmp_extern; jr CFUNCADDR; .endmacro -| -|.macro hotcheck, delta, target -| dsrl TMP1, PC, 1 -| andi TMP1, TMP1, 126 -| daddu TMP1, TMP1, DISPATCH -| lhu TMP2, GG_DISP2HOT(TMP1) -| addiu TMP2, TMP2, -delta -| bltz TMP2, target -|. sh TMP2, GG_DISP2HOT(TMP1) -|.endmacro -| -|.macro hotloop -| hotcheck HOTCOUNT_LOOP, ->vm_hotloop -|.endmacro -| -|.macro hotcall -| hotcheck HOTCOUNT_CALL, ->vm_hotcall -|.endmacro -| -|// Set current VM state. Uses TMP0. -|.macro li_vmstate, st; li TMP0, ~LJ_VMST_..st; .endmacro -|.macro st_vmstate; sw TMP0, DISPATCH_GL(vmstate)(DISPATCH); .endmacro -| -|// Move table write barrier back. Overwrites mark and tmp. -|.macro barrierback, tab, mark, tmp, target -| ld tmp, DISPATCH_GL(gc.grayagain)(DISPATCH) -| andi mark, mark, ~LJ_GC_BLACK & 255 // black2gray(tab) -| sd tab, DISPATCH_GL(gc.grayagain)(DISPATCH) -| sb mark, tab->marked -| b target -|. sd tmp, tab->gclist -|.endmacro -| -|// Clear type tag. Isolate lowest 14+32+1=47 bits of reg. -|.macro cleartp, reg; dextm reg, reg, 0, 14; .endmacro -|.macro cleartp, dst, reg; dextm dst, reg, 0, 14; .endmacro -| -|// Set type tag: Merge 17 type bits into bits [15+32=47, 31+32+1=64) of dst. -|.macro settp, dst, tp; dinsu dst, tp, 15, 31; .endmacro -| -|// Extract (negative) type tag. -|.macro gettp, dst, src; dsra dst, src, 47; .endmacro -| -|// Macros to check the TValue type and extract the GCobj. Branch on failure. -|.macro checktp, reg, tp, target -| gettp AT, reg -| daddiu AT, AT, tp -| bnez AT, target -|. cleartp reg -|.endmacro -|.macro checktp, dst, reg, tp, target -| gettp AT, reg -| daddiu AT, AT, tp -| bnez AT, target -|. cleartp dst, reg -|.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 checkint, reg, target // Caveat: has delay slot! -| gettp AT, reg -| bne AT, TISNUM, target -|.endmacro -|.macro checknum, reg, target // Caveat: has delay slot! -| gettp AT, reg -| sltiu AT, AT, LJ_TISNUM -| beqz AT, target -|.endmacro -| -|.macro mov_false, reg -| lu reg, 0x8000 -| dsll reg, reg, 32 -| not reg, reg -|.endmacro -|.macro mov_true, reg -| li reg, 0x0001 -| dsll reg, reg, 48 -| not reg, 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: - | // See vm_return. Also: TMP2 = previous base. - | andi AT, PC, FRAME_P - | beqz AT, ->cont_dispatch - | - | // Return from pcall or xpcall fast func. - |. mov_true TMP1 - | ld PC, FRAME_PC(TMP2) // Fetch PC of previous frame. - | move BASE, TMP2 // Restore caller base. - | // Prepending may overwrite the pcall frame, so do it at the end. - | sd TMP1, -8(RA) // Prepend true to results. - | daddiu RA, RA, -8 - | - |->vm_returnc: - | addiu RD, RD, 8 // RD = (nresults+1)*8. - | andi TMP0, PC, FRAME_TYPE - | beqz RD, ->vm_unwind_c_eh - |. li CRET1, LUA_YIELD - | beqz TMP0, ->BC_RET_Z // Handle regular return to Lua. - |. move MULTRES, RD - | - |->vm_return: - | // BASE = base, RA = resultptr, RD/MULTRES = (nresults+1)*8, PC = return - | // TMP0 = PC & FRAME_TYPE - | li TMP2, -8 - | xori AT, TMP0, FRAME_C - | and TMP2, PC, TMP2 - | bnez AT, ->vm_returnp - | dsubu TMP2, BASE, TMP2 // TMP2 = previous base. - | - | addiu TMP1, RD, -8 - | sd TMP2, L->base - | li_vmstate C - | lw TMP2, SAVE_NRES - | daddiu BASE, BASE, -16 - | st_vmstate - | beqz TMP1, >2 - |. sll TMP2, TMP2, 3 - |1: - | addiu TMP1, TMP1, -8 - | ld CRET1, 0(RA) - | daddiu RA, RA, 8 - | sd CRET1, 0(BASE) - | bnez TMP1, <1 - |. daddiu BASE, BASE, 8 - | - |2: - | bne TMP2, RD, >6 - |3: - |. sd BASE, L->top // Store new top. - | - |->vm_leave_cp: - | ld TMP0, SAVE_CFRAME // Restore previous C frame. - | move CRET1, r0 // Ok return status for vm_pcall. - | sd TMP0, L->cframe - | - |->vm_leave_unw: - | restoreregs_ret - | - |6: - | ld TMP1, L->maxstack - | slt AT, TMP2, RD - | bnez AT, >7 // Less results wanted? - | // More results wanted. Check stack size and fill up results with nil. - |. slt AT, BASE, TMP1 - | beqz AT, >8 - |. nop - | sd TISNIL, 0(BASE) - | addiu RD, RD, 8 - | b <2 - |. daddiu BASE, BASE, 8 - | - |7: // Less results wanted. - | subu TMP0, RD, TMP2 - | dsubu TMP0, BASE, TMP0 // Either keep top or shrink it. - | b <3 - |. movn BASE, TMP0, TMP2 // LUA_MULTRET+1 case? - | - |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. - | load_got lj_state_growstack - | move MULTRES, RD - | srl CARG2, TMP2, 3 - | call_intern lj_state_growstack // (lua_State *L, int n) - |. move CARG1, L - | lw TMP2, SAVE_NRES - | ld BASE, L->top // Need the (realloced) L->top in BASE. - | move RD, MULTRES - | b <2 - |. sll TMP2, TMP2, 3 - | - |->vm_unwind_c: // Unwind C stack, return from vm_pcall. - | // (void *cframe, int errcode) - | move sp, CARG1 - | move CRET1, CARG2 - |->vm_unwind_c_eh: // Landing pad for external unwinder. - | ld L, SAVE_L - | li TMP0, ~LJ_VMST_C - | ld GL:TMP1, L->glref - | b ->vm_leave_unw - |. sw TMP0, GL:TMP1->vmstate - | - |->vm_unwind_ff: // Unwind C stack, return from ff pcall. - | // (void *cframe) - | li AT, -4 - | and sp, CARG1, AT - |->vm_unwind_ff_eh: // Landing pad for external unwinder. - | ld L, SAVE_L - | .FPU lui TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float). - | li TISNIL, LJ_TNIL - | li TISNUM, LJ_TISNUM - | ld BASE, L->base - | ld DISPATCH, L->glref // Setup pointer to dispatch table. - | .FPU mtc1 TMP3, TOBIT - | mov_false TMP1 - | li_vmstate INTERP - | ld PC, FRAME_PC(BASE) // Fetch PC of previous frame. - | .FPU cvt.d.s TOBIT, TOBIT - | daddiu RA, BASE, -8 // Results start at BASE-8. - | daddiu DISPATCH, DISPATCH, GG_G2DISP - | sd TMP1, 0(RA) // Prepend false to error message. - | st_vmstate - | b ->vm_returnc - |. li RD, 16 // 2 results: false + error message. - | - |//----------------------------------------------------------------------- - |//-- Grow stack for calls ----------------------------------------------- - |//----------------------------------------------------------------------- - | - |->vm_growstack_c: // Grow stack for C function. - | b >2 - |. li CARG2, LUA_MINSTACK - | - |->vm_growstack_l: // Grow stack for Lua function. - | // BASE = new base, RA = BASE+framesize*8, RC = nargs*8, PC = first PC - | daddu RC, BASE, RC - | dsubu RA, RA, BASE - | sd BASE, L->base - | daddiu PC, PC, 4 // Must point after first instruction. - | sd RC, L->top - | srl CARG2, RA, 3 - |2: - | // L->base = new base, L->top = top - | load_got lj_state_growstack - | sd PC, SAVE_PC - | call_intern lj_state_growstack // (lua_State *L, int n) - |. move CARG1, L - | ld BASE, L->base - | ld RC, L->top - | ld LFUNC:RB, FRAME_FUNC(BASE) - | dsubu RC, RC, BASE - | cleartp LFUNC:RB - | // BASE = new base, RB = LFUNC/CFUNC, RC = nargs*8, FRAME_PC(BASE) = PC - | 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 - | move L, CARG1 - | ld DISPATCH, L->glref // Setup pointer to dispatch table. - | move BASE, CARG2 - | lbu TMP1, L->status - | sd L, SAVE_L - | li PC, FRAME_CP - | daddiu TMP0, sp, CFRAME_RESUME - | daddiu DISPATCH, DISPATCH, GG_G2DISP - | sw r0, SAVE_NRES - | sw r0, SAVE_ERRF - | sd CARG1, SAVE_PC // Any value outside of bytecode is ok. - | sd r0, SAVE_CFRAME - | beqz TMP1, >3 - |. sd TMP0, L->cframe - | - | // Resume after yield (like a return). - | sd L, DISPATCH_GL(cur_L)(DISPATCH) - | move RA, BASE - | ld BASE, L->base - | ld TMP1, L->top - | ld PC, FRAME_PC(BASE) - | .FPU lui TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float). - | dsubu RD, TMP1, BASE - | .FPU mtc1 TMP3, TOBIT - | sb r0, L->status - | .FPU cvt.d.s TOBIT, TOBIT - | li_vmstate INTERP - | daddiu RD, RD, 8 - | st_vmstate - | move MULTRES, RD - | andi TMP0, PC, FRAME_TYPE - | li TISNIL, LJ_TNIL - | beqz TMP0, ->BC_RET_Z - |. li TISNUM, LJ_TISNUM - | b ->vm_return - |. nop - | - |->vm_pcall: // Setup protected C frame and enter VM. - | // (lua_State *L, TValue *base, int nres1, ptrdiff_t ef) - | saveregs - | sw CARG4, SAVE_ERRF - | b >1 - |. li PC, FRAME_CP - | - |->vm_call: // Setup C frame and enter VM. - | // (lua_State *L, TValue *base, int nres1) - | saveregs - | li PC, FRAME_C - | - |1: // Entry point for vm_pcall above (PC = ftype). - | ld TMP1, L:CARG1->cframe - | move L, CARG1 - | sw CARG3, SAVE_NRES - | ld DISPATCH, L->glref // Setup pointer to dispatch table. - | sd CARG1, SAVE_L - | move BASE, CARG2 - | daddiu DISPATCH, DISPATCH, GG_G2DISP - | sd CARG1, SAVE_PC // Any value outside of bytecode is ok. - | sd TMP1, SAVE_CFRAME - | sd sp, L->cframe // Add our C frame to cframe chain. - | - |3: // Entry point for vm_cpcall/vm_resume (BASE = base, PC = ftype). - | sd L, DISPATCH_GL(cur_L)(DISPATCH) - | ld TMP2, L->base // TMP2 = old base (used in vmeta_call). - | .FPU lui TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float). - | ld TMP1, L->top - | .FPU mtc1 TMP3, TOBIT - | daddu PC, PC, BASE - | dsubu NARGS8:RC, TMP1, BASE - | li TISNUM, LJ_TISNUM - | dsubu PC, PC, TMP2 // PC = frame delta + frame type - | .FPU cvt.d.s TOBIT, TOBIT - | li_vmstate INTERP - | li TISNIL, LJ_TNIL - | st_vmstate - | - |->vm_call_dispatch: - | // TMP2 = old base, BASE = new base, RC = nargs*8, PC = caller PC - | ld LFUNC:RB, FRAME_FUNC(BASE) - | checkfunc LFUNC:RB, ->vmeta_call - | - |->vm_call_dispatch_f: - | ins_call - | // BASE = new base, RB = func, RC = nargs*8, PC = caller PC - | - |->vm_cpcall: // Setup protected C frame, call C. - | // (lua_State *L, lua_CFunction func, void *ud, lua_CPFunction cp) - | saveregs - | move L, CARG1 - | ld TMP0, L:CARG1->stack - | sd CARG1, SAVE_L - | ld TMP1, L->top - | ld DISPATCH, L->glref // Setup pointer to dispatch table. - | sd CARG1, SAVE_PC // Any value outside of bytecode is ok. - | dsubu TMP0, TMP0, TMP1 // Compute -savestack(L, L->top). - | ld TMP1, L->cframe - | daddiu DISPATCH, DISPATCH, GG_G2DISP - | sw TMP0, SAVE_NRES // Neg. delta means cframe w/o frame. - | sw r0, SAVE_ERRF // No error function. - | sd TMP1, SAVE_CFRAME - | sd sp, L->cframe // Add our C frame to cframe chain. - | sd L, DISPATCH_GL(cur_L)(DISPATCH) - | jalr CARG4 // (lua_State *L, lua_CFunction func, void *ud) - |. move CFUNCADDR, CARG4 - | move BASE, CRET1 - | bnez CRET1, <3 // Else continue with the call. - |. li PC, FRAME_CP - | b ->vm_leave_cp // No base? Just remove C frame. - |. nop - | - |//----------------------------------------------------------------------- - |//-- Metamethod handling ------------------------------------------------ - |//----------------------------------------------------------------------- - | - |// The lj_meta_* functions (except for lj_meta_cat) don't reallocate the - |// stack, so BASE doesn't need to be reloaded across these calls. - | - |//-- Continuation dispatch ---------------------------------------------- - | - |->cont_dispatch: - | // BASE = meta base, RA = resultptr, RD = (nresults+1)*8 - | ld TMP0, -32(BASE) // Continuation. - | move RB, BASE - | move BASE, TMP2 // Restore caller BASE. - | ld LFUNC:TMP1, FRAME_FUNC(TMP2) - |.if FFI - | sltiu AT, TMP0, 2 - |.endif - | ld PC, -24(RB) // Restore PC from [cont|PC]. - | cleartp LFUNC:TMP1 - | daddu TMP2, RA, RD - | ld TMP1, LFUNC:TMP1->pc - |.if FFI - | bnez AT, >1 - |.endif - |. sd TISNIL, -8(TMP2) // Ensure one valid arg. - | // BASE = base, RA = resultptr, RB = meta base - | jr TMP0 // Jump to continuation. - |. ld KBASE, PC2PROTO(k)(TMP1) - | - |.if FFI - |1: - | bnez TMP0, ->cont_ffi_callback // cont = 1: return from FFI callback. - | // cont = 0: tailcall from C function. - |. daddiu TMP1, RB, -32 - | b ->vm_call_tail - |. dsubu RC, TMP1, BASE - |.endif - | - |->cont_cat: // RA = resultptr, RB = meta base - | lw INS, -4(PC) - | daddiu CARG2, RB, -32 - | ld CRET1, 0(RA) - | decode_RB8a MULTRES, INS - | decode_RA8a RA, INS - | decode_RB8b MULTRES - | decode_RA8b RA - | daddu TMP1, BASE, MULTRES - | sd BASE, L->base - | dsubu CARG3, CARG2, TMP1 - | bne TMP1, CARG2, ->BC_CAT_Z - |. sd CRET1, 0(CARG2) - | daddu RA, BASE, RA - | b ->cont_nop - |. sd CRET1, 0(RA) - | - |//-- Table indexing metamethods ----------------------------------------- - | - |->vmeta_tgets1: - | daddiu CARG3, DISPATCH, DISPATCH_GL(tmptv) - | li TMP0, LJ_TSTR - | settp STR:RC, TMP0 - | b >1 - |. sd STR:RC, 0(CARG3) - | - |->vmeta_tgets: - | daddiu CARG2, DISPATCH, DISPATCH_GL(tmptv) - | li TMP0, LJ_TTAB - | li TMP1, LJ_TSTR - | settp TAB:RB, TMP0 - | daddiu CARG3, DISPATCH, DISPATCH_GL(tmptv2) - | sd TAB:RB, 0(CARG2) - | settp STR:RC, TMP1 - | b >1 - |. sd STR:RC, 0(CARG3) - | - |->vmeta_tgetb: // TMP0 = index - | daddiu CARG3, DISPATCH, DISPATCH_GL(tmptv) - | settp TMP0, TISNUM - | sd TMP0, 0(CARG3) - | - |->vmeta_tgetv: - |1: - | load_got lj_meta_tget - | sd BASE, L->base - | sd PC, SAVE_PC - | call_intern lj_meta_tget // (lua_State *L, TValue *o, TValue *k) - |. move CARG1, L - | // Returns TValue * (finished) or NULL (metamethod). - | beqz CRET1, >3 - |. daddiu TMP1, BASE, -FRAME_CONT - | ld CARG1, 0(CRET1) - | ins_next1 - | sd CARG1, 0(RA) - | ins_next2 - | - |3: // Call __index metamethod. - | // BASE = base, L->top = new base, stack = cont/func/t/k - | ld BASE, L->top - | sd PC, -24(BASE) // [cont|PC] - | dsubu PC, BASE, TMP1 - | ld LFUNC:RB, FRAME_FUNC(BASE) // Guaranteed to be a function here. - | cleartp LFUNC:RB - | b ->vm_call_dispatch_f - |. li NARGS8:RC, 16 // 2 args for func(t, k). - | - |->vmeta_tgetr: - | load_got lj_tab_getinth - | call_intern lj_tab_getinth // (GCtab *t, int32_t key) - |. nop - | // Returns cTValue * or NULL. - | beqz CRET1, ->BC_TGETR_Z - |. move CARG2, TISNIL - | b ->BC_TGETR_Z - |. ld CARG2, 0(CRET1) - | - |//----------------------------------------------------------------------- - | - |->vmeta_tsets1: - | daddiu CARG3, DISPATCH, DISPATCH_GL(tmptv) - | li TMP0, LJ_TSTR - | settp STR:RC, TMP0 - | b >1 - |. sd STR:RC, 0(CARG3) - | - |->vmeta_tsets: - | daddiu CARG2, DISPATCH, DISPATCH_GL(tmptv) - | li TMP0, LJ_TTAB - | li TMP1, LJ_TSTR - | settp TAB:RB, TMP0 - | daddiu CARG3, DISPATCH, DISPATCH_GL(tmptv2) - | sd TAB:RB, 0(CARG2) - | settp STR:RC, TMP1 - | b >1 - |. sd STR:RC, 0(CARG3) - | - |->vmeta_tsetb: // TMP0 = index - | daddiu CARG3, DISPATCH, DISPATCH_GL(tmptv) - | settp TMP0, TISNUM - | sd TMP0, 0(CARG3) - | - |->vmeta_tsetv: - |1: - | load_got lj_meta_tset - | sd BASE, L->base - | sd PC, SAVE_PC - | call_intern lj_meta_tset // (lua_State *L, TValue *o, TValue *k) - |. move CARG1, L - | // Returns TValue * (finished) or NULL (metamethod). - | beqz CRET1, >3 - |. ld CARG1, 0(RA) - | // NOBARRIER: lj_meta_tset ensures the table is not black. - | ins_next1 - | sd CARG1, 0(CRET1) - | ins_next2 - | - |3: // Call __newindex metamethod. - | // BASE = base, L->top = new base, stack = cont/func/t/k/(v) - | daddiu TMP1, BASE, -FRAME_CONT - | ld BASE, L->top - | sd PC, -24(BASE) // [cont|PC] - | dsubu PC, BASE, TMP1 - | ld LFUNC:RB, FRAME_FUNC(BASE) // Guaranteed to be a function here. - | cleartp LFUNC:RB - | sd CARG1, 16(BASE) // Copy value to third argument. - | b ->vm_call_dispatch_f - |. li NARGS8:RC, 24 // 3 args for func(t, k, v) - | - |->vmeta_tsetr: - | load_got lj_tab_setinth - | sd BASE, L->base - | sd PC, SAVE_PC - | call_intern lj_tab_setinth // (lua_State *L, GCtab *t, int32_t key) - |. move CARG1, L - | // Returns TValue *. - | b ->BC_TSETR_Z - |. nop - | - |//-- Comparison metamethods --------------------------------------------- - | - |->vmeta_comp: - | // RA/RD point to o1/o2. - | move CARG2, RA - | move CARG3, RD - | load_got lj_meta_comp - | daddiu PC, PC, -4 - | sd BASE, L->base - | sd PC, SAVE_PC - | decode_OP1 CARG4, INS - | call_intern lj_meta_comp // (lua_State *L, TValue *o1, *o2, int op) - |. move CARG1, L - | // Returns 0/1 or TValue * (metamethod). - |3: - | sltiu AT, CRET1, 2 - | beqz AT, ->vmeta_binop - | negu TMP2, CRET1 - |4: - | lhu RD, OFS_RD(PC) - | daddiu PC, PC, 4 - | lui TMP1, (-(BCBIAS_J*4 >> 16) & 65535) - | sll RD, RD, 2 - | addu RD, RD, TMP1 - | and RD, RD, TMP2 - | daddu PC, PC, RD - |->cont_nop: - | ins_next - | - |->cont_ra: // RA = resultptr - | lbu TMP1, -4+OFS_RA(PC) - | ld CRET1, 0(RA) - | sll TMP1, TMP1, 3 - | daddu TMP1, BASE, TMP1 - | b ->cont_nop - |. sd CRET1, 0(TMP1) - | - |->cont_condt: // RA = resultptr - | ld TMP0, 0(RA) - | gettp TMP0, TMP0 - | sltiu AT, TMP0, LJ_TISTRUECOND - | b <4 - |. negu TMP2, AT // Branch if result is true. - | - |->cont_condf: // RA = resultptr - | ld TMP0, 0(RA) - | gettp TMP0, TMP0 - | sltiu AT, TMP0, LJ_TISTRUECOND - | b <4 - |. addiu TMP2, AT, -1 // Branch if result is false. - | - |->vmeta_equal: - | // CARG1/CARG2 point to o1/o2. TMP0 is set to 0/1. - | load_got lj_meta_equal - | cleartp LFUNC:CARG3, CARG2 - | cleartp LFUNC:CARG2, CARG1 - | move CARG4, TMP0 - | daddiu PC, PC, -4 - | sd BASE, L->base - | sd PC, SAVE_PC - | call_intern lj_meta_equal // (lua_State *L, GCobj *o1, *o2, int ne) - |. move CARG1, L - | // Returns 0/1 or TValue * (metamethod). - | b <3 - |. nop - | - |->vmeta_equal_cd: - |.if FFI - | load_got lj_meta_equal_cd - | move CARG2, INS - | daddiu PC, PC, -4 - | sd BASE, L->base - | sd PC, SAVE_PC - | call_intern lj_meta_equal_cd // (lua_State *L, BCIns op) - |. move CARG1, L - | // Returns 0/1 or TValue * (metamethod). - | b <3 - |. nop - |.endif - | - |->vmeta_istype: - | load_got lj_meta_istype - | daddiu PC, PC, -4 - | sd BASE, L->base - | srl CARG2, RA, 3 - | srl CARG3, RD, 3 - | sd PC, SAVE_PC - | call_intern lj_meta_istype // (lua_State *L, BCReg ra, BCReg tp) - |. move CARG1, L - | b ->cont_nop - |. nop - | - |//-- Arithmetic metamethods --------------------------------------------- - | - |->vmeta_unm: - | move RC, RB - | - |->vmeta_arith: - | load_got lj_meta_arith - | sd BASE, L->base - | move CARG2, RA - | sd PC, SAVE_PC - | move CARG3, RB - | move CARG4, RC - | decode_OP1 CARG5, INS // CARG5 == RB. - | call_intern lj_meta_arith // (lua_State *L, TValue *ra,*rb,*rc, BCReg op) - |. move CARG1, L - | // Returns NULL (finished) or TValue * (metamethod). - | beqz CRET1, ->cont_nop - |. nop - | - | // Call metamethod for binary op. - |->vmeta_binop: - | // BASE = old base, CRET1 = new base, stack = cont/func/o1/o2 - | dsubu TMP1, CRET1, BASE - | sd PC, -24(CRET1) // [cont|PC] - | move TMP2, BASE - | daddiu PC, TMP1, FRAME_CONT - | move BASE, CRET1 - | b ->vm_call_dispatch - |. li NARGS8:RC, 16 // 2 args for func(o1, o2). - | - |->vmeta_len: - | // CARG2 already set by BC_LEN. -#if LJ_52 - | move MULTRES, CARG1 -#endif - | load_got lj_meta_len - | sd BASE, L->base - | sd PC, SAVE_PC - | call_intern lj_meta_len // (lua_State *L, TValue *o) - |. move CARG1, L - | // Returns NULL (retry) or TValue * (metamethod base). -#if LJ_52 - | bnez CRET1, ->vmeta_binop // Binop call for compatibility. - |. nop - | b ->BC_LEN_Z - |. move CARG1, MULTRES -#else - | b ->vmeta_binop // Binop call for compatibility. - |. nop -#endif - | - |//-- Call metamethod ---------------------------------------------------- - | - |->vmeta_call: // Resolve and call __call metamethod. - | // TMP2 = old base, BASE = new base, RC = nargs*8 - | load_got lj_meta_call - | sd TMP2, L->base // This is the callers base! - | daddiu CARG2, BASE, -16 - | sd PC, SAVE_PC - | daddu CARG3, BASE, RC - | move MULTRES, NARGS8:RC - | call_intern lj_meta_call // (lua_State *L, TValue *func, TValue *top) - |. move CARG1, L - | ld LFUNC:RB, FRAME_FUNC(BASE) // Guaranteed to be a function here. - | daddiu NARGS8:RC, MULTRES, 8 // Got one more argument now. - | cleartp LFUNC:RB - | ins_call - | - |->vmeta_callt: // Resolve __call for BC_CALLT. - | // BASE = old base, RA = new base, RC = nargs*8 - | load_got lj_meta_call - | sd BASE, L->base - | daddiu CARG2, RA, -16 - | sd PC, SAVE_PC - | daddu CARG3, RA, RC - | move MULTRES, NARGS8:RC - | call_intern lj_meta_call // (lua_State *L, TValue *func, TValue *top) - |. move CARG1, L - | ld RB, FRAME_FUNC(RA) // Guaranteed to be a function here. - | ld TMP1, FRAME_PC(BASE) - | daddiu NARGS8:RC, MULTRES, 8 // Got one more argument now. - | b ->BC_CALLT_Z - |. cleartp LFUNC:CARG3, RB - | - |//-- Argument coercion for 'for' statement ------------------------------ - | - |->vmeta_for: - | load_got lj_meta_for - | sd BASE, L->base - | move CARG2, RA - | sd PC, SAVE_PC - | move MULTRES, INS - | call_intern lj_meta_for // (lua_State *L, TValue *base) - |. move CARG1, L - |.if JIT - | decode_OP1 TMP0, MULTRES - | li AT, BC_JFORI - |.endif - | decode_RA8a RA, MULTRES - | decode_RD8a RD, MULTRES - | decode_RA8b RA - |.if JIT - | beq TMP0, AT, =>BC_JFORI - |. decode_RD8b RD - | b =>BC_FORI - |. nop - |.else - | b =>BC_FORI - |. decode_RD8b RD - |.endif - | - |//----------------------------------------------------------------------- - |//-- Fast functions ----------------------------------------------------- - |//----------------------------------------------------------------------- - | - |.macro .ffunc, name - |->ff_ .. name: - |.endmacro - | - |.macro .ffunc_1, name - |->ff_ .. name: - | beqz NARGS8:RC, ->fff_fallback - |. ld CARG1, 0(BASE) - |.endmacro - | - |.macro .ffunc_2, name - |->ff_ .. name: - | sltiu AT, NARGS8:RC, 16 - | ld CARG1, 0(BASE) - | bnez AT, ->fff_fallback - |. ld CARG2, 8(BASE) - |.endmacro - | - |.macro .ffunc_n, name // Caveat: has delay slot! - |->ff_ .. name: - | ld CARG1, 0(BASE) - | beqz NARGS8:RC, ->fff_fallback - | // Either ldc1 or the 1st instruction of checknum is in the delay slot. - | .FPU ldc1 FARG1, 0(BASE) - | checknum CARG1, ->fff_fallback - |.endmacro - | - |.macro .ffunc_nn, name // Caveat: has delay slot! - |->ff_ .. name: - | ld CARG1, 0(BASE) - | sltiu AT, NARGS8:RC, 16 - | ld CARG2, 8(BASE) - | bnez AT, ->fff_fallback - |. gettp TMP0, CARG1 - | gettp TMP1, CARG2 - | sltiu TMP0, TMP0, LJ_TISNUM - | sltiu TMP1, TMP1, LJ_TISNUM - | .FPU ldc1 FARG1, 0(BASE) - | and TMP0, TMP0, TMP1 - | .FPU ldc1 FARG2, 8(BASE) - | beqz TMP0, ->fff_fallback - |.endmacro - | - |// Inlined GC threshold check. Caveat: uses TMP0 and TMP1 and has delay slot! - |.macro ffgccheck - | ld TMP0, DISPATCH_GL(gc.total)(DISPATCH) - | ld TMP1, DISPATCH_GL(gc.threshold)(DISPATCH) - | dsubu AT, TMP0, TMP1 - | bgezal AT, ->fff_gcstep - |.endmacro - | - |//-- Base library: checks ----------------------------------------------- - |.ffunc_1 assert - | gettp AT, CARG1 - | sltiu AT, AT, LJ_TISTRUECOND - | beqz AT, ->fff_fallback - |. daddiu RA, BASE, -16 - | ld PC, FRAME_PC(BASE) - | addiu RD, NARGS8:RC, 8 // Compute (nresults+1)*8. - | daddu TMP2, RA, RD - | daddiu TMP1, BASE, 8 - | beq BASE, TMP2, ->fff_res // Done if exactly 1 argument. - |. sd CARG1, 0(RA) - |1: - | ld CRET1, 0(TMP1) - | sd CRET1, -16(TMP1) - | bne TMP1, TMP2, <1 - |. daddiu TMP1, TMP1, 8 - | b ->fff_res - |. nop - | - |.ffunc_1 type - | gettp TMP0, CARG1 - | sltu TMP1, TISNUM, TMP0 - | not TMP2, TMP0 - | li TMP3, ~LJ_TISNUM - | movz TMP2, TMP3, TMP1 - | dsll TMP2, TMP2, 3 - | daddu TMP2, CFUNC:RB, TMP2 - | b ->fff_restv - |. ld CARG1, CFUNC:TMP2->upvalue - | - |//-- Base library: getters and setters --------------------------------- - | - |.ffunc_1 getmetatable - | gettp TMP2, CARG1 - | daddiu TMP0, TMP2, -LJ_TTAB - | daddiu TMP1, TMP2, -LJ_TUDATA - | movn TMP0, TMP1, TMP0 - | bnez TMP0, >6 - |. cleartp TAB:CARG1 - |1: // Field metatable must be at same offset for GCtab and GCudata! - | ld TAB:RB, TAB:CARG1->metatable - |2: - | ld STR:RC, DISPATCH_GL(gcroot[GCROOT_MMNAME+MM_metatable])(DISPATCH) - | beqz TAB:RB, ->fff_restv - |. li CARG1, LJ_TNIL - | lw TMP0, TAB:RB->hmask - | lw TMP1, STR:RC->hash - | ld NODE:TMP2, TAB:RB->node - | and TMP1, TMP1, TMP0 // idx = str->hash & tab->hmask - | dsll TMP0, TMP1, 5 - | dsll TMP1, TMP1, 3 - | dsubu TMP1, TMP0, TMP1 - | daddu NODE:TMP2, NODE:TMP2, TMP1 // node = tab->node + (idx*32-idx*8) - | li CARG4, LJ_TSTR - | settp STR:RC, CARG4 // Tagged key to look for. - |3: // Rearranged logic, because we expect _not_ to find the key. - | ld TMP0, NODE:TMP2->key - | ld CARG1, NODE:TMP2->val - | ld NODE:TMP2, NODE:TMP2->next - | beq RC, TMP0, >5 - |. li AT, LJ_TTAB - | bnez NODE:TMP2, <3 - |. nop - |4: - | move CARG1, RB - | b ->fff_restv // Not found, keep default result. - |. settp CARG1, AT - |5: - | bne CARG1, TISNIL, ->fff_restv - |. nop - | b <4 // Ditto for nil value. - |. nop - | - |6: - | sltiu AT, TMP2, LJ_TISNUM - | movn TMP2, TISNUM, AT - | dsll TMP2, TMP2, 3 - | dsubu TMP0, DISPATCH, TMP2 - | b <2 - |. ld TAB:RB, DISPATCH_GL(gcroot[GCROOT_BASEMT])-8(TMP0) - | - |.ffunc_2 setmetatable - | // Fast path: no mt for table yet and not clearing the mt. - | checktp TMP1, CARG1, -LJ_TTAB, ->fff_fallback - | gettp TMP3, CARG2 - | ld TAB:TMP0, TAB:TMP1->metatable - | lbu TMP2, TAB:TMP1->marked - | daddiu AT, TMP3, -LJ_TTAB - | cleartp TAB:CARG2 - | or AT, AT, TAB:TMP0 - | bnez AT, ->fff_fallback - |. andi AT, TMP2, LJ_GC_BLACK // isblack(table) - | beqz AT, ->fff_restv - |. sd TAB:CARG2, TAB:TMP1->metatable - | barrierback TAB:TMP1, TMP2, TMP0, ->fff_restv - | - |.ffunc rawget - | ld CARG2, 0(BASE) - | sltiu AT, NARGS8:RC, 16 - | load_got lj_tab_get - | gettp TMP0, CARG2 - | cleartp CARG2 - | daddiu TMP0, TMP0, -LJ_TTAB - | or AT, AT, TMP0 - | bnez AT, ->fff_fallback - |. daddiu CARG3, BASE, 8 - | call_intern lj_tab_get // (lua_State *L, GCtab *t, cTValue *key) - |. move CARG1, L - | b ->fff_restv - |. ld CARG1, 0(CRET1) - | - |//-- Base library: conversions ------------------------------------------ - | - |.ffunc tonumber - | // Only handles the number case inline (without a base argument). - | ld CARG1, 0(BASE) - | xori AT, NARGS8:RC, 8 // Exactly one number argument. - | gettp TMP1, CARG1 - | sltu TMP0, TISNUM, TMP1 - | or AT, AT, TMP0 - | bnez AT, ->fff_fallback - |. nop - | b ->fff_restv - |. nop - | - |.ffunc_1 tostring - | // Only handles the string or number case inline. - | gettp TMP0, CARG1 - | daddiu AT, TMP0, -LJ_TSTR - | // A __tostring method in the string base metatable is ignored. - | beqz AT, ->fff_restv // String key? - | // Handle numbers inline, unless a number base metatable is present. - |. ld TMP1, DISPATCH_GL(gcroot[GCROOT_BASEMT_NUM])(DISPATCH) - | sltu TMP0, TISNUM, TMP0 - | or TMP0, TMP0, TMP1 - | bnez TMP0, ->fff_fallback - |. sd BASE, L->base // Add frame since C call can throw. - | ffgccheck - |. sd PC, SAVE_PC // Redundant (but a defined value). - | load_got lj_strfmt_number - | move CARG1, L - | call_intern lj_strfmt_number // (lua_State *L, cTValue *o) - |. move CARG2, BASE - | // Returns GCstr *. - | li AT, LJ_TSTR - | settp CRET1, AT - | b ->fff_restv - |. move CARG1, CRET1 - | - |//-- Base library: iterators ------------------------------------------- - | - |.ffunc_1 next - | checktp CARG2, CARG1, -LJ_TTAB, ->fff_fallback - | daddu TMP2, BASE, NARGS8:RC - | sd TISNIL, 0(TMP2) // Set missing 2nd arg to nil. - | ld PC, FRAME_PC(BASE) - | load_got lj_tab_next - | sd BASE, L->base // Add frame since C call can throw. - | sd BASE, L->top // Dummy frame length is ok. - | daddiu CARG3, BASE, 8 - | sd PC, SAVE_PC - | call_intern lj_tab_next // (lua_State *L, GCtab *t, TValue *key) - |. move CARG1, L - | // Returns 0 at end of traversal. - | beqz CRET1, ->fff_restv // End of traversal: return nil. - |. move CARG1, TISNIL - | ld TMP0, 8(BASE) - | daddiu RA, BASE, -16 - | ld TMP2, 16(BASE) - | sd TMP0, 0(RA) - | sd TMP2, 8(RA) - | b ->fff_res - |. li RD, (2+1)*8 - | - |.ffunc_1 pairs - | checktp TAB:TMP1, CARG1, -LJ_TTAB, ->fff_fallback - | ld PC, FRAME_PC(BASE) -#if LJ_52 - | ld TAB:TMP2, TAB:TMP1->metatable - | ld TMP0, CFUNC:RB->upvalue[0] - | bnez TAB:TMP2, ->fff_fallback -#else - | ld TMP0, CFUNC:RB->upvalue[0] -#endif - |. daddiu RA, BASE, -16 - | sd TISNIL, 0(BASE) - | sd CARG1, -8(BASE) - | sd TMP0, 0(RA) - | b ->fff_res - |. li RD, (3+1)*8 - | - |.ffunc_2 ipairs_aux - | checktab CARG1, ->fff_fallback - | checkint CARG2, ->fff_fallback - |. lw TMP0, TAB:CARG1->asize - | ld TMP1, TAB:CARG1->array - | ld PC, FRAME_PC(BASE) - | sextw TMP2, CARG2 - | addiu TMP2, TMP2, 1 - | sltu AT, TMP2, TMP0 - | daddiu RA, BASE, -16 - | zextw TMP0, TMP2 - | settp TMP0, TISNUM - | beqz AT, >2 // Not in array part? - |. sd TMP0, 0(RA) - | dsll TMP3, TMP2, 3 - | daddu TMP3, TMP1, TMP3 - | ld TMP1, 0(TMP3) - |1: - | beq TMP1, TISNIL, ->fff_res // End of iteration, return 0 results. - |. li RD, (0+1)*8 - | sd TMP1, -8(BASE) - | b ->fff_res - |. li RD, (2+1)*8 - |2: // Check for empty hash part first. Otherwise call C function. - | lw TMP0, TAB:CARG1->hmask - | load_got lj_tab_getinth - | beqz TMP0, ->fff_res - |. li RD, (0+1)*8 - | call_intern lj_tab_getinth // (GCtab *t, int32_t key) - |. move CARG2, TMP2 - | // Returns cTValue * or NULL. - | beqz CRET1, ->fff_res - |. li RD, (0+1)*8 - | b <1 - |. ld TMP1, 0(CRET1) - | - |.ffunc_1 ipairs - | checktp TAB:TMP1, CARG1, -LJ_TTAB, ->fff_fallback - | ld PC, FRAME_PC(BASE) -#if LJ_52 - | ld TAB:TMP2, TAB:TMP1->metatable - | ld CFUNC:TMP0, CFUNC:RB->upvalue[0] - | bnez TAB:TMP2, ->fff_fallback -#else - | ld TMP0, CFUNC:RB->upvalue[0] -#endif - | daddiu RA, BASE, -16 - | dsll AT, TISNUM, 47 - | sd CARG1, -8(BASE) - | sd AT, 0(BASE) - | sd CFUNC:TMP0, 0(RA) - | b ->fff_res - |. li RD, (3+1)*8 - | - |//-- Base library: catch errors ---------------------------------------- - | - |.ffunc pcall - | daddiu NARGS8:RC, NARGS8:RC, -8 - | lbu TMP3, DISPATCH_GL(hookmask)(DISPATCH) - | bltz NARGS8:RC, ->fff_fallback - |. move TMP2, BASE - | daddiu BASE, BASE, 16 - | // Remember active hook before pcall. - | srl TMP3, TMP3, HOOK_ACTIVE_SHIFT - | andi TMP3, TMP3, 1 - | daddiu PC, TMP3, 16+FRAME_PCALL - | beqz NARGS8:RC, ->vm_call_dispatch - |1: - |. daddu TMP0, BASE, NARGS8:RC - |2: - | ld TMP1, -16(TMP0) - | sd TMP1, -8(TMP0) - | daddiu TMP0, TMP0, -8 - | bne TMP0, BASE, <2 - |. nop - | b ->vm_call_dispatch - |. nop - | - |.ffunc xpcall - | daddiu NARGS8:TMP0, NARGS8:RC, -16 - | ld CARG1, 0(BASE) - | ld CARG2, 8(BASE) - | bltz NARGS8:TMP0, ->fff_fallback - |. lbu TMP1, DISPATCH_GL(hookmask)(DISPATCH) - | gettp AT, CARG2 - | daddiu AT, AT, -LJ_TFUNC - | bnez AT, ->fff_fallback // Traceback must be a function. - |. move TMP2, BASE - | move NARGS8:RC, NARGS8:TMP0 - | daddiu BASE, BASE, 24 - | // Remember active hook before pcall. - | srl TMP3, TMP3, HOOK_ACTIVE_SHIFT - | sd CARG2, 0(TMP2) // Swap function and traceback. - | andi TMP3, TMP3, 1 - | sd CARG1, 8(TMP2) - | beqz NARGS8:RC, ->vm_call_dispatch - |. daddiu PC, TMP3, 24+FRAME_PCALL - | b <1 - |. nop - | - |//-- Coroutine library -------------------------------------------------- - | - |.macro coroutine_resume_wrap, resume - |.if resume - |.ffunc_1 coroutine_resume - | checktp CARG1, CARG1, -LJ_TTHREAD, ->fff_fallback - |.else - |.ffunc coroutine_wrap_aux - | ld L:CARG1, CFUNC:RB->upvalue[0].gcr - | cleartp L:CARG1 - |.endif - | lbu TMP0, L:CARG1->status - | ld TMP1, L:CARG1->cframe - | ld CARG2, L:CARG1->top - | ld TMP2, L:CARG1->base - | addiu AT, TMP0, -LUA_YIELD - | daddu CARG3, CARG2, TMP0 - | daddiu TMP3, CARG2, 8 - | bgtz AT, ->fff_fallback // st > LUA_YIELD? - |. movn CARG2, TMP3, AT - | xor TMP2, TMP2, CARG3 - | bnez TMP1, ->fff_fallback // cframe != 0? - |. or AT, TMP2, TMP0 - | ld TMP0, L:CARG1->maxstack - | beqz AT, ->fff_fallback // base == top && st == 0? - |. ld PC, FRAME_PC(BASE) - | daddu TMP2, CARG2, NARGS8:RC - | sltu AT, TMP0, TMP2 - | bnez AT, ->fff_fallback // Stack overflow? - |. sd PC, SAVE_PC - | sd BASE, L->base - |1: - |.if resume - | daddiu BASE, BASE, 8 // Keep resumed thread in stack for GC. - | daddiu NARGS8:RC, NARGS8:RC, -8 - | daddiu TMP2, TMP2, -8 - |.endif - | sd TMP2, L:CARG1->top - | daddu TMP1, BASE, NARGS8:RC - | move CARG3, CARG2 - | sd BASE, L->top - |2: // Move args to coroutine. - | ld CRET1, 0(BASE) - | sltu AT, BASE, TMP1 - | beqz AT, >3 - |. daddiu BASE, BASE, 8 - | sd CRET1, 0(CARG3) - | b <2 - |. daddiu CARG3, CARG3, 8 - |3: - | bal ->vm_resume // (lua_State *L, TValue *base, 0, 0) - |. move L:RA, L:CARG1 - | // Returns thread status. - |4: - | ld TMP2, L:RA->base - | sltiu AT, CRET1, LUA_YIELD+1 - | ld TMP3, L:RA->top - | li_vmstate INTERP - | ld BASE, L->base - | sd L, DISPATCH_GL(cur_L)(DISPATCH) - | st_vmstate - | beqz AT, >8 - |. dsubu RD, TMP3, TMP2 - | ld TMP0, L->maxstack - | beqz RD, >6 // No results? - |. daddu TMP1, BASE, RD - | sltu AT, TMP0, TMP1 - | bnez AT, >9 // Need to grow stack? - |. daddu TMP3, TMP2, RD - | sd TMP2, L:RA->top // Clear coroutine stack. - | move TMP1, BASE - |5: // Move results from coroutine. - | ld CRET1, 0(TMP2) - | daddiu TMP2, TMP2, 8 - | sltu AT, TMP2, TMP3 - | sd CRET1, 0(TMP1) - | bnez AT, <5 - |. daddiu TMP1, TMP1, 8 - |6: - | andi TMP0, PC, FRAME_TYPE - |.if resume - | mov_true TMP1 - | daddiu RA, BASE, -8 - | sd TMP1, -8(BASE) // Prepend true to results. - | daddiu RD, RD, 16 - |.else - | move RA, BASE - | daddiu RD, RD, 8 - |.endif - |7: - | sd PC, SAVE_PC - | beqz TMP0, ->BC_RET_Z - |. move MULTRES, RD - | b ->vm_return - |. nop - | - |8: // Coroutine returned with error (at co->top-1). - |.if resume - | daddiu TMP3, TMP3, -8 - | mov_false TMP1 - | ld CRET1, 0(TMP3) - | sd TMP3, L:RA->top // Remove error from coroutine stack. - | li RD, (2+1)*8 - | sd TMP1, -8(BASE) // Prepend false to results. - | daddiu RA, BASE, -8 - | sd CRET1, 0(BASE) // Copy error message. - | b <7 - |. andi TMP0, PC, FRAME_TYPE - |.else - | load_got lj_ffh_coroutine_wrap_err - | move CARG2, L:RA - | call_intern lj_ffh_coroutine_wrap_err // (lua_State *L, lua_State *co) - |. move CARG1, L - |.endif - | - |9: // Handle stack expansion on return from yield. - | load_got lj_state_growstack - | srl CARG2, RD, 3 - | call_intern lj_state_growstack // (lua_State *L, int n) - |. move CARG1, L - | b <4 - |. li CRET1, 0 - |.endmacro - | - | coroutine_resume_wrap 1 // coroutine.resume - | coroutine_resume_wrap 0 // coroutine.wrap - | - |.ffunc coroutine_yield - | ld TMP0, L->cframe - | daddu TMP1, BASE, NARGS8:RC - | sd BASE, L->base - | andi TMP0, TMP0, CFRAME_RESUME - | sd TMP1, L->top - | beqz TMP0, ->fff_fallback - |. li CRET1, LUA_YIELD - | sd r0, L->cframe - | b ->vm_leave_unw - |. sb CRET1, L->status - | - |//-- Math library ------------------------------------------------------- - | - |.ffunc_1 math_abs - | gettp CARG2, CARG1 - | daddiu AT, CARG2, -LJ_TISNUM - | bnez AT, >1 - |. sextw TMP1, CARG1 - | sra TMP0, TMP1, 31 // Extract sign. - | xor TMP1, TMP1, TMP0 - | dsubu CARG1, TMP1, TMP0 - | dsll TMP3, CARG1, 32 - | bgez TMP3, ->fff_restv - |. settp CARG1, TISNUM - | li CARG1, 0x41e0 // 2^31 as a double. - | b ->fff_restv - |. dsll CARG1, CARG1, 48 - |1: - | sltiu AT, CARG2, LJ_TISNUM - | beqz AT, ->fff_fallback - |. dextm CARG1, CARG1, 0, 30 - |// fallthrough - | - |->fff_restv: - | // CARG1 = TValue result. - | ld PC, FRAME_PC(BASE) - | daddiu RA, BASE, -16 - | sd CARG1, -16(BASE) - |->fff_res1: - | // RA = results, PC = return. - | li RD, (1+1)*8 - |->fff_res: - | // RA = results, RD = (nresults+1)*8, PC = return. - | andi TMP0, PC, FRAME_TYPE - | bnez TMP0, ->vm_return - |. move MULTRES, RD - | lw INS, -4(PC) - | decode_RB8a RB, INS - | decode_RB8b RB - |5: - | sltu AT, RD, RB - | bnez AT, >6 // More results expected? - |. decode_RA8a TMP0, INS - | decode_RA8b TMP0 - | ins_next1 - | // Adjust BASE. KBASE is assumed to be set for the calling frame. - | dsubu BASE, RA, TMP0 - | ins_next2 - | - |6: // Fill up results with nil. - | daddu TMP1, RA, RD - | daddiu RD, RD, 8 - | b <5 - |. sd TISNIL, -8(TMP1) - | - |.macro math_extern, func - | .ffunc_n math_ .. func - | load_got func - | call_extern - |. nop - | b ->fff_resn - |. nop - |.endmacro - | - |.macro math_extern2, func - | .ffunc_nn math_ .. func - |. load_got func - | call_extern - |. nop - | b ->fff_resn - |. nop - |.endmacro - | - |// TODO: Return integer type if result is integer (own sf implementation). - |.macro math_round, func - |->ff_math_ .. func: - | ld CARG1, 0(BASE) - | beqz NARGS8:RC, ->fff_fallback - |. gettp TMP0, CARG1 - | beq TMP0, TISNUM, ->fff_restv - |. sltu AT, TMP0, TISNUM - | beqz AT, ->fff_fallback - |.if FPU - |. ldc1 FARG1, 0(BASE) - | bal ->vm_ .. func - |. nop - |.else - |. load_got func - | call_extern - |. nop - |.endif - | b ->fff_resn - |. nop - |.endmacro - | - | math_round floor - | math_round ceil - | - |.ffunc math_log - | li AT, 8 - | bne NARGS8:RC, AT, ->fff_fallback // Exactly 1 argument. - |. ld CARG1, 0(BASE) - | checknum CARG1, ->fff_fallback - |. load_got log - |.if FPU - | call_extern - |. ldc1 FARG1, 0(BASE) - |.else - | call_extern - |. nop - |.endif - | b ->fff_resn - |. nop - | - | 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 - | - |.if FPU - |.ffunc_n math_sqrt - |. sqrt.d FRET1, FARG1 - |// fallthrough to ->fff_resn - |.else - | math_extern sqrt - |.endif - | - |->fff_resn: - | ld PC, FRAME_PC(BASE) - | daddiu RA, BASE, -16 - | b ->fff_res1 - |.if FPU - |. sdc1 FRET1, 0(RA) - |.else - |. sd CRET1, 0(RA) - |.endif - | - | - |.ffunc_2 math_ldexp - | checknum CARG1, ->fff_fallback - | checkint CARG2, ->fff_fallback - |. load_got ldexp - | .FPU ldc1 FARG1, 0(BASE) - | call_extern - |. lw CARG2, 8+LO(BASE) - | b ->fff_resn - |. nop - | - |.ffunc_n math_frexp - | load_got frexp - | ld PC, FRAME_PC(BASE) - | call_extern - |. daddiu CARG2, DISPATCH, DISPATCH_GL(tmptv) - | lw TMP1, DISPATCH_GL(tmptv)(DISPATCH) - | daddiu RA, BASE, -16 - |.if FPU - | mtc1 TMP1, FARG2 - | sdc1 FRET1, 0(RA) - | cvt.d.w FARG2, FARG2 - | sdc1 FARG2, 8(RA) - |.else - | sd CRET1, 0(RA) - | zextw TMP1, TMP1 - | settp TMP1, TISNUM - | sd TMP1, 8(RA) - |.endif - | b ->fff_res - |. li RD, (2+1)*8 - | - |.ffunc_n math_modf - | load_got modf - | ld PC, FRAME_PC(BASE) - | call_extern - |. daddiu CARG2, BASE, -16 - | daddiu RA, BASE, -16 - |.if FPU - | sdc1 FRET1, -8(BASE) - |.else - | sd CRET1, -8(BASE) - |.endif - | b ->fff_res - |. li RD, (2+1)*8 - | - |.macro math_minmax, name, intins, fpins - | .ffunc_1 name - | daddu TMP3, BASE, NARGS8:RC - | checkint CARG1, >5 - |. daddiu TMP2, BASE, 8 - |1: // Handle integers. - | beq TMP2, TMP3, ->fff_restv - |. ld CARG2, 0(TMP2) - | checkint CARG2, >3 - |. sextw CARG1, CARG1 - | lw CARG2, LO(TMP2) - |. slt AT, CARG1, CARG2 - | intins CARG1, CARG2, AT - | daddiu TMP2, TMP2, 8 - | zextw CARG1, CARG1 - | b <1 - |. settp CARG1, TISNUM - | - |3: // Convert intermediate result to number and continue with number loop. - | checknum CARG2, ->fff_fallback - |.if FPU - |. mtc1 CARG1, FRET1 - | cvt.d.w FRET1, FRET1 - | b >7 - |. ldc1 FARG1, 0(TMP2) - |.else - |. nop - | bal ->vm_sfi2d_1 - |. nop - | b >7 - |. nop - |.endif - | - |5: - | .FPU ldc1 FRET1, 0(BASE) - | checknum CARG1, ->fff_fallback - |6: // Handle numbers. - |. ld CARG2, 0(TMP2) - | beq TMP2, TMP3, ->fff_resn - |.if FPU - | ldc1 FARG1, 0(TMP2) - |.else - | move CRET1, CARG1 - |.endif - | checknum CARG2, >8 - |. nop - |7: - |.if FPU - | c.olt.d FRET1, FARG1 - | fpins FRET1, FARG1 - |.else - | bal ->vm_sfcmpolt - |. nop - | intins CARG1, CARG2, CRET1 - |.endif - | b <6 - |. daddiu TMP2, TMP2, 8 - | - |8: // Convert integer to number and continue with number loop. - | checkint CARG2, ->fff_fallback - |.if FPU - |. lwc1 FARG1, LO(TMP2) - | b <7 - |. cvt.d.w FARG1, FARG1 - |.else - |. lw CARG2, LO(TMP2) - | bal ->vm_sfi2d_2 - |. nop - | b <7 - |. nop - |.endif - | - |.endmacro - | - | math_minmax math_min, movz, movf.d - | math_minmax math_max, movn, movt.d - | - |//-- String library ----------------------------------------------------- - | - |.ffunc string_byte // Only handle the 1-arg case here. - | ld CARG1, 0(BASE) - | gettp TMP0, CARG1 - | xori AT, NARGS8:RC, 8 - | daddiu TMP0, TMP0, -LJ_TSTR - | or AT, AT, TMP0 - | bnez AT, ->fff_fallback // Need exactly 1 string argument. - |. cleartp STR:CARG1 - | lw TMP0, STR:CARG1->len - | daddiu RA, BASE, -16 - | ld PC, FRAME_PC(BASE) - | sltu RD, r0, TMP0 - | lbu TMP1, STR:CARG1[1] // Access is always ok (NUL at end). - | addiu RD, RD, 1 - | sll RD, RD, 3 // RD = ((str->len != 0)+1)*8 - | settp TMP1, TISNUM - | b ->fff_res - |. sd TMP1, 0(RA) - | - |.ffunc string_char // Only handle the 1-arg case here. - | ffgccheck - |. nop - | ld CARG1, 0(BASE) - | gettp TMP0, CARG1 - | xori AT, NARGS8:RC, 8 // Exactly 1 argument. - | daddiu TMP0, TMP0, -LJ_TISNUM // Integer. - | li TMP1, 255 - | sextw CARG1, CARG1 - | or AT, AT, TMP0 - | sltu TMP1, TMP1, CARG1 // !(255 < n). - | or AT, AT, TMP1 - | bnez AT, ->fff_fallback - |. li CARG3, 1 - | daddiu CARG2, sp, TMPD_OFS - | sb CARG1, TMPD - |->fff_newstr: - | load_got lj_str_new - | sd BASE, L->base - | sd PC, SAVE_PC - | call_intern lj_str_new // (lua_State *L, char *str, size_t l) - |. move CARG1, L - | // Returns GCstr *. - | ld BASE, L->base - |->fff_resstr: - | li AT, LJ_TSTR - | settp CRET1, AT - | b ->fff_restv - |. move CARG1, CRET1 - | - |.ffunc string_sub - | ffgccheck - |. nop - | addiu AT, NARGS8:RC, -16 - | ld TMP0, 0(BASE) - | bltz AT, ->fff_fallback - |. gettp TMP3, TMP0 - | cleartp STR:CARG1, TMP0 - | ld CARG2, 8(BASE) - | beqz AT, >1 - |. li CARG4, -1 - | ld CARG3, 16(BASE) - | checkint CARG3, ->fff_fallback - |. sextw CARG4, CARG3 - |1: - | checkint CARG2, ->fff_fallback - |. li AT, LJ_TSTR - | bne TMP3, AT, ->fff_fallback - |. sextw CARG3, CARG2 - | lw CARG2, STR:CARG1->len - | // STR:CARG1 = str, CARG2 = str->len, CARG3 = start, CARG4 = end - | slt AT, CARG4, r0 - | addiu TMP0, CARG2, 1 - | addu TMP1, CARG4, TMP0 - | slt TMP3, CARG3, r0 - | movn CARG4, TMP1, AT // if (end < 0) end += len+1 - | addu TMP1, CARG3, TMP0 - | movn CARG3, TMP1, TMP3 // if (start < 0) start += len+1 - | li TMP2, 1 - | slt AT, CARG4, r0 - | slt TMP3, r0, CARG3 - | movn CARG4, r0, AT // if (end < 0) end = 0 - | movz CARG3, TMP2, TMP3 // if (start < 1) start = 1 - | slt AT, CARG2, CARG4 - | movn CARG4, CARG2, AT // if (end > len) end = len - | daddu CARG2, STR:CARG1, CARG3 - | subu CARG3, CARG4, CARG3 // len = end - start - | daddiu CARG2, CARG2, sizeof(GCstr)-1 - | bgez CARG3, ->fff_newstr - |. addiu CARG3, CARG3, 1 // len++ - |->fff_emptystr: // Return empty string. - | li AT, LJ_TSTR - | daddiu STR:CARG1, DISPATCH, DISPATCH_GL(strempty) - | b ->fff_restv - |. settp CARG1, AT - | - |.macro ffstring_op, name - | .ffunc string_ .. name - | ffgccheck - |. nop - | beqz NARGS8:RC, ->fff_fallback - |. ld CARG2, 0(BASE) - | checkstr STR:CARG2, ->fff_fallback - | daddiu SBUF:CARG1, DISPATCH, DISPATCH_GL(tmpbuf) - | load_got lj_buf_putstr_ .. name - | ld TMP0, SBUF:CARG1->b - | sd L, SBUF:CARG1->L - | sd BASE, L->base - | sd TMP0, SBUF:CARG1->p - | call_intern extern lj_buf_putstr_ .. name - |. sd PC, SAVE_PC - | load_got lj_buf_tostr - | call_intern lj_buf_tostr - |. move SBUF:CARG1, SBUF:CRET1 - | b ->fff_resstr - |. ld BASE, L->base - |.endmacro - | - |ffstring_op reverse - |ffstring_op lower - |ffstring_op upper - | - |//-- Bit library -------------------------------------------------------- - | - |->vm_tobit_fb: - | beqz TMP1, ->fff_fallback - |.if FPU - |. ldc1 FARG1, 0(BASE) - | add.d FARG1, FARG1, TOBIT - | mfc1 CRET1, FARG1 - | jr ra - |. zextw CRET1, CRET1 - |.else - |// FP number to bit conversion for soft-float. - |->vm_tobit: - | dsll TMP0, CARG1, 1 - | li CARG3, 1076 - | dsrl AT, TMP0, 53 - | dsubu CARG3, CARG3, AT - | sltiu AT, CARG3, 54 - | beqz AT, >1 - |. dextm TMP0, TMP0, 0, 20 - | dinsu TMP0, AT, 21, 21 - | slt AT, CARG1, r0 - | dsrlv CRET1, TMP0, CARG3 - | dsubu TMP0, r0, CRET1 - | movn CRET1, TMP0, AT - | jr ra - |. zextw CRET1, CRET1 - |1: - | jr ra - |. move CRET1, r0 - | - |// FP number to int conversion with a check for soft-float. - |// Modifies CARG1, CRET1, CRET2, TMP0, AT. - |->vm_tointg: - |.if JIT - | dsll CRET2, CARG1, 1 - | beqz CRET2, >2 - |. li TMP0, 1076 - | dsrl AT, CRET2, 53 - | dsubu TMP0, TMP0, AT - | sltiu AT, TMP0, 54 - | beqz AT, >1 - |. dextm CRET2, CRET2, 0, 20 - | dinsu CRET2, AT, 21, 21 - | slt AT, CARG1, r0 - | dsrlv CRET1, CRET2, TMP0 - | dsubu CARG1, r0, CRET1 - | movn CRET1, CARG1, AT - | li CARG1, 64 - | subu TMP0, CARG1, TMP0 - | dsllv CRET2, CRET2, TMP0 // Integer check. - | sextw AT, CRET1 - | xor AT, CRET1, AT // Range check. - | jr ra - |. movz CRET2, AT, CRET2 - |1: - | jr ra - |. li CRET2, 1 - |2: - | jr ra - |. move CRET1, r0 - |.endif - |.endif - | - |.macro .ffunc_bit, name - | .ffunc_1 bit_..name - | gettp TMP0, CARG1 - | beq TMP0, TISNUM, >6 - |. zextw CRET1, CARG1 - | bal ->vm_tobit_fb - |. sltiu TMP1, TMP0, LJ_TISNUM - |6: - |.endmacro - | - |.macro .ffunc_bit_op, name, bins - | .ffunc_bit name - | daddiu TMP2, BASE, 8 - | daddu TMP3, BASE, NARGS8:RC - |1: - | beq TMP2, TMP3, ->fff_resi - |. ld CARG1, 0(TMP2) - | gettp TMP0, CARG1 - |.if FPU - | bne TMP0, TISNUM, >2 - |. daddiu TMP2, TMP2, 8 - | zextw CARG1, CARG1 - | b <1 - |. bins CRET1, CRET1, CARG1 - |2: - | ldc1 FARG1, -8(TMP2) - | sltiu AT, TMP0, LJ_TISNUM - | beqz AT, ->fff_fallback - |. add.d FARG1, FARG1, TOBIT - | mfc1 CARG1, FARG1 - | zextw CARG1, CARG1 - | b <1 - |. bins CRET1, CRET1, CARG1 - |.else - | beq TMP0, TISNUM, >2 - |. move CRET2, CRET1 - | bal ->vm_tobit_fb - |. sltiu TMP1, TMP0, LJ_TISNUM - | move CARG1, CRET2 - |2: - | zextw CARG1, CARG1 - | bins CRET1, CRET1, CARG1 - | b <1 - |. daddiu TMP2, TMP2, 8 - |.endif - |.endmacro - | - |.ffunc_bit_op band, and - |.ffunc_bit_op bor, or - |.ffunc_bit_op bxor, xor - | - |.ffunc_bit bswap - | dsrl TMP0, CRET1, 8 - | dsrl TMP1, CRET1, 24 - | andi TMP2, TMP0, 0xff00 - | dins TMP1, CRET1, 24, 31 - | dins TMP2, TMP0, 16, 23 - | b ->fff_resi - |. or CRET1, TMP1, TMP2 - | - |.ffunc_bit bnot - | not CRET1, CRET1 - | b ->fff_resi - |. zextw CRET1, CRET1 - | - |.macro .ffunc_bit_sh, name, shins, shmod - | .ffunc_2 bit_..name - | gettp TMP0, CARG1 - | beq TMP0, TISNUM, >1 - |. nop - | bal ->vm_tobit_fb - |. sltiu TMP1, TMP0, LJ_TISNUM - | move CARG1, CRET1 - |1: - | gettp TMP0, CARG2 - | bne TMP0, TISNUM, ->fff_fallback - |. zextw CARG2, CARG2 - | sextw CARG1, CARG1 - |.if shmod == 1 - | negu CARG2, CARG2 - |.endif - | shins CRET1, CARG1, CARG2 - | b ->fff_resi - |. zextw CRET1, CRET1 - |.endmacro - | - |.ffunc_bit_sh lshift, sllv, 0 - |.ffunc_bit_sh rshift, srlv, 0 - |.ffunc_bit_sh arshift, srav, 0 - |.ffunc_bit_sh rol, rotrv, 1 - |.ffunc_bit_sh ror, rotrv, 0 - | - |.ffunc_bit tobit - |->fff_resi: - | ld PC, FRAME_PC(BASE) - | daddiu RA, BASE, -16 - | settp CRET1, TISNUM - | b ->fff_res1 - |. sd CRET1, -16(BASE) - | - |//----------------------------------------------------------------------- - |->fff_fallback: // Call fast function fallback handler. - | // BASE = new base, RB = CFUNC, RC = nargs*8 - | ld TMP3, CFUNC:RB->f - | daddu TMP1, BASE, NARGS8:RC - | ld PC, FRAME_PC(BASE) // Fallback may overwrite PC. - | daddiu TMP0, TMP1, 8*LUA_MINSTACK - | ld TMP2, L->maxstack - | sd PC, SAVE_PC // Redundant (but a defined value). - | sltu AT, TMP2, TMP0 - | sd BASE, L->base - | sd TMP1, L->top - | bnez AT, >5 // Need to grow stack. - |. move CFUNCADDR, TMP3 - | jalr TMP3 // (lua_State *L) - |. move CARG1, L - | // Either throws an error, or recovers and returns -1, 0 or nresults+1. - | ld BASE, L->base - | sll RD, CRET1, 3 - | bgtz CRET1, ->fff_res // Returned nresults+1? - |. daddiu RA, BASE, -16 - |1: // Returned 0 or -1: retry fast path. - | ld LFUNC:RB, FRAME_FUNC(BASE) - | ld TMP0, L->top - | cleartp LFUNC:RB - | bnez CRET1, ->vm_call_tail // Returned -1? - |. dsubu NARGS8:RC, TMP0, BASE - | ins_callt // Returned 0: retry fast path. - | - |// Reconstruct previous base for vmeta_call during tailcall. - |->vm_call_tail: - | andi TMP0, PC, FRAME_TYPE - | li AT, -4 - | bnez TMP0, >3 - |. and TMP1, PC, AT - | lbu TMP1, OFS_RA(PC) - | sll TMP1, TMP1, 3 - | addiu TMP1, TMP1, 16 - |3: - | b ->vm_call_dispatch // Resolve again for tailcall. - |. dsubu TMP2, BASE, TMP1 - | - |5: // Grow stack for fallback handler. - | load_got lj_state_growstack - | li CARG2, LUA_MINSTACK - | call_intern lj_state_growstack // (lua_State *L, int n) - |. move CARG1, L - | ld BASE, L->base - | b <1 - |. li CRET1, 0 // Force retry. - | - |->fff_gcstep: // Call GC step function. - | // BASE = new base, RC = nargs*8 - | move MULTRES, ra - | load_got lj_gc_step - | sd BASE, L->base - | daddu TMP0, BASE, NARGS8:RC - | sd PC, SAVE_PC // Redundant (but a defined value). - | sd TMP0, L->top - | call_intern lj_gc_step // (lua_State *L) - |. move CARG1, L - | ld BASE, L->base - | move ra, MULTRES - | ld TMP0, L->top - | ld CFUNC:RB, FRAME_FUNC(BASE) - | cleartp CFUNC:RB - | jr ra - |. dsubu NARGS8:RC, TMP0, BASE - | - |//----------------------------------------------------------------------- - |//-- Special dispatch targets ------------------------------------------- - |//----------------------------------------------------------------------- - | - |->vm_record: // Dispatch target for recording phase. - |.if JIT - | lbu TMP3, DISPATCH_GL(hookmask)(DISPATCH) - | andi AT, TMP3, HOOK_VMEVENT // No recording while in vmevent. - | bnez AT, >5 - | // Decrement the hookcount for consistency, but always do the call. - |. lw TMP2, DISPATCH_GL(hookcount)(DISPATCH) - | andi AT, TMP3, HOOK_ACTIVE - | bnez AT, >1 - |. addiu TMP2, TMP2, -1 - | andi AT, TMP3, LUA_MASKLINE|LUA_MASKCOUNT - | beqz AT, >1 - |. nop - | b >1 - |. sw TMP2, DISPATCH_GL(hookcount)(DISPATCH) - |.endif - | - |->vm_rethook: // Dispatch target for return hooks. - | lbu TMP3, DISPATCH_GL(hookmask)(DISPATCH) - | andi AT, TMP3, HOOK_ACTIVE // Hook already active? - | beqz AT, >1 - |5: // Re-dispatch to static ins. - |. ld AT, GG_DISP2STATIC(TMP0) // Assumes TMP0 holds DISPATCH+OP*4. - | jr AT - |. nop - | - |->vm_inshook: // Dispatch target for instr/line hooks. - | lbu TMP3, DISPATCH_GL(hookmask)(DISPATCH) - | lw TMP2, DISPATCH_GL(hookcount)(DISPATCH) - | andi AT, TMP3, HOOK_ACTIVE // Hook already active? - | bnez AT, <5 - |. andi AT, TMP3, LUA_MASKLINE|LUA_MASKCOUNT - | beqz AT, <5 - |. addiu TMP2, TMP2, -1 - | beqz TMP2, >1 - |. sw TMP2, DISPATCH_GL(hookcount)(DISPATCH) - | andi AT, TMP3, LUA_MASKLINE - | beqz AT, <5 - |1: - |. load_got lj_dispatch_ins - | sw MULTRES, SAVE_MULTRES - | move CARG2, PC - | sd BASE, L->base - | // SAVE_PC must hold the _previous_ PC. The callee updates it with PC. - | call_intern lj_dispatch_ins // (lua_State *L, const BCIns *pc) - |. move CARG1, L - |3: - | ld BASE, L->base - |4: // Re-dispatch to static ins. - | lw INS, -4(PC) - | decode_OP8a TMP1, INS - | decode_OP8b TMP1 - | daddu TMP0, DISPATCH, TMP1 - | decode_RD8a RD, INS - | ld AT, GG_DISP2STATIC(TMP0) - | decode_RA8a RA, INS - | decode_RD8b RD - | jr AT - | decode_RA8b RA - | - |->cont_hook: // Continue from hook yield. - | daddiu PC, PC, 4 - | b <4 - |. lw MULTRES, -24+LO(RB) // Restore MULTRES for *M ins. - | - |->vm_hotloop: // Hot loop counter underflow. - |.if JIT - | ld LFUNC:TMP1, FRAME_FUNC(BASE) - | daddiu CARG1, DISPATCH, GG_DISP2J - | cleartp LFUNC:TMP1 - | sd PC, SAVE_PC - | ld TMP1, LFUNC:TMP1->pc - | move CARG2, PC - | sd L, DISPATCH_J(L)(DISPATCH) - | lbu TMP1, PC2PROTO(framesize)(TMP1) - | load_got lj_trace_hot - | sd BASE, L->base - | dsll TMP1, TMP1, 3 - | daddu TMP1, BASE, TMP1 - | call_intern lj_trace_hot // (jit_State *J, const BCIns *pc) - |. sd TMP1, L->top - | b <3 - |. nop - |.endif - | - | - |->vm_callhook: // Dispatch target for call hooks. - |.if JIT - | b >1 - |.endif - |. move CARG2, PC - | - |->vm_hotcall: // Hot call counter underflow. - |.if JIT - | ori CARG2, PC, 1 - |1: - |.endif - | load_got lj_dispatch_call - | daddu TMP0, BASE, RC - | sd PC, SAVE_PC - | sd BASE, L->base - | dsubu RA, RA, BASE - | sd TMP0, L->top - | call_intern lj_dispatch_call // (lua_State *L, const BCIns *pc) - |. move CARG1, L - | // Returns ASMFunction. - | ld BASE, L->base - | ld TMP0, L->top - | sd r0, SAVE_PC // Invalidate for subsequent line hook. - | dsubu NARGS8:RC, TMP0, BASE - | daddu RA, BASE, RA - | ld LFUNC:RB, FRAME_FUNC(BASE) - | cleartp LFUNC:RB - | jr CRET1 - |. lw INS, -4(PC) - | - |->cont_stitch: // Trace stitching. - |.if JIT - | // RA = resultptr, RB = meta base - | lw INS, -4(PC) - | ld TRACE:TMP2, -40(RB) // Save previous trace. - | decode_RA8a RC, INS - | daddiu AT, MULTRES, -8 - | cleartp TRACE:TMP2 - | decode_RA8b RC - | beqz AT, >2 - |. daddu RC, BASE, RC // Call base. - |1: // Move results down. - | ld CARG1, 0(RA) - | daddiu AT, AT, -8 - | daddiu RA, RA, 8 - | sd CARG1, 0(RC) - | bnez AT, <1 - |. daddiu RC, RC, 8 - |2: - | decode_RA8a RA, INS - | decode_RB8a RB, INS - | decode_RA8b RA - | decode_RB8b RB - | daddu RA, RA, RB - | daddu RA, BASE, RA - |3: - | sltu AT, RC, RA - | bnez AT, >9 // More results wanted? - |. nop - | - | lhu TMP3, TRACE:TMP2->traceno - | lhu RD, TRACE:TMP2->link - | beq RD, TMP3, ->cont_nop // Blacklisted. - |. load_got lj_dispatch_stitch - | bnez RD, =>BC_JLOOP // Jump to stitched trace. - |. sll RD, RD, 3 - | - | // Stitch a new trace to the previous trace. - | sw TMP3, DISPATCH_J(exitno)(DISPATCH) - | sd L, DISPATCH_J(L)(DISPATCH) - | sd BASE, L->base - | daddiu CARG1, DISPATCH, GG_DISP2J - | call_intern lj_dispatch_stitch // (jit_State *J, const BCIns *pc) - |. move CARG2, PC - | b ->cont_nop - |. ld BASE, L->base - | - |9: - | sd TISNIL, 0(RC) - | b <3 - |. daddiu RC, RC, 8 - |.endif - | - |->vm_profhook: // Dispatch target for profiler hook. -#if LJ_HASPROFILE - | load_got lj_dispatch_profile - | sw MULTRES, SAVE_MULTRES - | move CARG2, PC - | sd BASE, L->base - | call_intern lj_dispatch_profile // (lua_State *L, const BCIns *pc) - |. move CARG1, L - | // HOOK_PROFILE is off again, so re-dispatch to dynamic instruction. - | daddiu PC, PC, -4 - | b ->cont_nop - |. ld BASE, L->base -#endif - | - |//----------------------------------------------------------------------- - |//-- Trace exit handler ------------------------------------------------- - |//----------------------------------------------------------------------- - | - |.macro savex_, a, b - |.if FPU - | sdc1 f..a, a*8(sp) - | sdc1 f..b, b*8(sp) - | sd r..a, 32*8+a*8(sp) - | sd r..b, 32*8+b*8(sp) - |.else - | sd r..a, a*8(sp) - | sd r..b, b*8(sp) - |.endif - |.endmacro - | - |->vm_exit_handler: - |.if JIT - |.if FPU - | daddiu sp, sp, -(32*8+32*8) - |.else - | daddiu sp, sp, -(32*8) - |.endif - | savex_ 0, 1 - | savex_ 2, 3 - | savex_ 4, 5 - | savex_ 6, 7 - | savex_ 8, 9 - | savex_ 10, 11 - | savex_ 12, 13 - | savex_ 14, 15 - | savex_ 16, 17 - | savex_ 18, 19 - | savex_ 20, 21 - | savex_ 22, 23 - | savex_ 24, 25 - | savex_ 26, 27 - | savex_ 28, 30 - |.if FPU - | sdc1 f29, 29*8(sp) - | sdc1 f31, 31*8(sp) - | sd r0, 32*8+31*8(sp) // Clear RID_TMP. - | daddiu TMP2, sp, 32*8+32*8 // Recompute original value of sp. - | sd TMP2, 32*8+29*8(sp) // Store sp in RID_SP - |.else - | sd r0, 31*8(sp) // Clear RID_TMP. - | daddiu TMP2, sp, 32*8 // Recompute original value of sp. - | sd TMP2, 29*8(sp) // Store sp in RID_SP - |.endif - | li_vmstate EXIT - | daddiu DISPATCH, JGL, -GG_DISP2G-32768 - | lw TMP1, 0(TMP2) // Load exit number. - | st_vmstate - | ld L, DISPATCH_GL(cur_L)(DISPATCH) - | ld BASE, DISPATCH_GL(jit_base)(DISPATCH) - | load_got lj_trace_exit - | sd L, DISPATCH_J(L)(DISPATCH) - | sw ra, DISPATCH_J(parent)(DISPATCH) // Store trace number. - | sd BASE, L->base - | sw TMP1, DISPATCH_J(exitno)(DISPATCH) // Store exit number. - | daddiu CARG1, DISPATCH, GG_DISP2J - | sd r0, DISPATCH_GL(jit_base)(DISPATCH) - | call_intern lj_trace_exit // (jit_State *J, ExitState *ex) - |. move CARG2, sp - | // Returns MULTRES (unscaled) or negated error code. - | ld TMP1, L->cframe - | li AT, -4 - | ld BASE, L->base - | and sp, TMP1, AT - | ld PC, SAVE_PC // Get SAVE_PC. - | b >1 - |. sd L, SAVE_L // Set SAVE_L (on-trace resume/yield). - |.endif - |->vm_exit_interp: - |.if JIT - | // CRET1 = MULTRES or negated error code, BASE, PC and JGL set. - | ld L, SAVE_L - | daddiu DISPATCH, JGL, -GG_DISP2G-32768 - | sd BASE, L->base - |1: - | bltz CRET1, >9 // Check for error from exit. - |. ld LFUNC:RB, FRAME_FUNC(BASE) - | .FPU lui TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float). - | dsll MULTRES, CRET1, 3 - | cleartp LFUNC:RB - | sw MULTRES, SAVE_MULTRES - | li TISNIL, LJ_TNIL - | li TISNUM, LJ_TISNUM // Setup type comparison constants. - | .FPU mtc1 TMP3, TOBIT - | ld TMP1, LFUNC:RB->pc - | sd r0, DISPATCH_GL(jit_base)(DISPATCH) - | ld KBASE, PC2PROTO(k)(TMP1) - | .FPU cvt.d.s TOBIT, TOBIT - | // Modified copy of ins_next which handles function header dispatch, too. - | lw INS, 0(PC) - | daddiu PC, PC, 4 - | // Assumes TISNIL == ~LJ_VMST_INTERP == -1 - | sw TISNIL, DISPATCH_GL(vmstate)(DISPATCH) - | decode_OP8a TMP1, INS - | decode_OP8b TMP1 - | sltiu TMP2, TMP1, BC_FUNCF*8 - | daddu TMP0, DISPATCH, TMP1 - | decode_RD8a RD, INS - | ld AT, 0(TMP0) - | decode_RA8a RA, INS - | beqz TMP2, >2 - |. decode_RA8b RA - | jr AT - |. decode_RD8b RD - |2: - | sltiu TMP2, TMP1, (BC_FUNCC+2)*8 // Fast function? - | bnez TMP2, >3 - |. ld TMP1, FRAME_PC(BASE) - | // Check frame below fast function. - | andi TMP0, TMP1, FRAME_TYPE - | bnez TMP0, >3 // Trace stitching continuation? - |. nop - | // Otherwise set KBASE for Lua function below fast function. - | lw TMP2, -4(TMP1) - | decode_RA8a TMP0, TMP2 - | decode_RA8b TMP0 - | dsubu TMP1, BASE, TMP0 - | ld LFUNC:TMP2, -32(TMP1) - | cleartp LFUNC:TMP2 - | ld TMP1, LFUNC:TMP2->pc - | ld KBASE, PC2PROTO(k)(TMP1) - |3: - | daddiu RC, MULTRES, -8 - | jr AT - |. daddu RA, RA, BASE - | - |9: // Rethrow error from the right C frame. - | load_got lj_err_throw - | negu CARG2, CRET1 - | call_intern lj_err_throw // (lua_State *L, int errcode) - |. move CARG1, L - |.endif - | - |//----------------------------------------------------------------------- - |//-- Math helper functions ---------------------------------------------- - |//----------------------------------------------------------------------- - | - |// Hard-float round to integer. - |// Modifies AT, TMP0, FRET1, FRET2, f4. Keeps all others incl. FARG1. - |.macro vm_round_hf, func - | lui TMP0, 0x4330 // Hiword of 2^52 (double). - | dsll TMP0, TMP0, 32 - | dmtc1 TMP0, f4 - | abs.d FRET2, FARG1 // |x| - | dmfc1 AT, FARG1 - | c.olt.d 0, FRET2, f4 - | add.d FRET1, FRET2, f4 // (|x| + 2^52) - 2^52 - | bc1f 0, >1 // Truncate only if |x| < 2^52. - |. sub.d FRET1, FRET1, f4 - | slt AT, AT, r0 - |.if "func" == "ceil" - | lui TMP0, 0xbff0 // Hiword of -1 (double). Preserves -0. - |.else - | lui TMP0, 0x3ff0 // Hiword of +1 (double). - |.endif - |.if "func" == "trunc" - | dsll TMP0, TMP0, 32 - | dmtc1 TMP0, f4 - | c.olt.d 0, FRET2, FRET1 // |x| < result? - | sub.d FRET2, FRET1, f4 - | movt.d FRET1, FRET2, 0 // If yes, subtract +1. - | neg.d FRET2, FRET1 - | jr ra - |. movn.d FRET1, FRET2, AT // Merge sign bit back in. - |.else - | neg.d FRET2, FRET1 - | dsll TMP0, TMP0, 32 - | dmtc1 TMP0, f4 - | movn.d FRET1, FRET2, AT // Merge sign bit back in. - |.if "func" == "ceil" - | c.olt.d 0, FRET1, FARG1 // x > result? - |.else - | c.olt.d 0, FARG1, FRET1 // x < result? - |.endif - | sub.d FRET2, FRET1, f4 // If yes, subtract +-1. - | jr ra - |. movt.d FRET1, FRET2, 0 - |.endif - |1: - | jr ra - |. mov.d FRET1, FARG1 - |.endmacro - | - |.macro vm_round, func - |.if FPU - | vm_round_hf, func - |.endif - |.endmacro - | - |->vm_floor: - | vm_round floor - |->vm_ceil: - | vm_round ceil - |->vm_trunc: - |.if JIT - | vm_round trunc - |.endif - | - |// Soft-float integer to number conversion. - |.macro sfi2d, ARG - |.if not FPU - | beqz ARG, >9 // Handle zero first. - |. sra TMP0, ARG, 31 - | xor TMP1, ARG, TMP0 - | dsubu TMP1, TMP1, TMP0 // Absolute value in TMP1. - | dclz ARG, TMP1 - | addiu ARG, ARG, -11 - | li AT, 0x3ff+63-11-1 - | dsllv TMP1, TMP1, ARG // Align mantissa left with leading 1. - | subu ARG, AT, ARG // Exponent - 1. - | ins ARG, TMP0, 11, 11 // Sign | Exponent. - | dsll ARG, ARG, 52 // Align left. - | jr ra - |. daddu ARG, ARG, TMP1 // Add mantissa, increment exponent. - |9: - | jr ra - |. nop - |.endif - |.endmacro - | - |// Input CARG1. Output: CARG1. Temporaries: AT, TMP0, TMP1. - |->vm_sfi2d_1: - | sfi2d CARG1 - | - |// Input CARG2. Output: CARG2. Temporaries: AT, TMP0, TMP1. - |->vm_sfi2d_2: - | sfi2d CARG2 - | - |// Soft-float comparison. Equivalent to c.eq.d. - |// Input: CARG*. Output: CRET1. Temporaries: AT, TMP0, TMP1. - |->vm_sfcmpeq: - |.if not FPU - | dsll AT, CARG1, 1 - | dsll TMP0, CARG2, 1 - | or TMP1, AT, TMP0 - | beqz TMP1, >8 // Both args +-0: return 1. - |. lui TMP1, 0xffe0 - | dsll TMP1, TMP1, 32 - | sltu AT, TMP1, AT - | sltu TMP0, TMP1, TMP0 - | or TMP1, AT, TMP0 - | bnez TMP1, >9 // Either arg is NaN: return 0; - |. xor AT, CARG1, CARG2 - | jr ra - |. sltiu CRET1, AT, 1 // Same values: return 1. - |8: - | jr ra - |. li CRET1, 1 - |9: - | jr ra - |. li CRET1, 0 - |.endif - | - |// Soft-float comparison. Equivalent to c.ult.d and c.olt.d. - |// Input: CARG1, CARG2. Output: CRET1. Temporaries: AT, TMP0, TMP1, CRET2. - |->vm_sfcmpult: - |.if not FPU - | b >1 - |. li CRET2, 1 - |.endif - | - |->vm_sfcmpolt: - |.if not FPU - | li CRET2, 0 - |1: - | dsll AT, CARG1, 1 - | dsll TMP0, CARG2, 1 - | or TMP1, AT, TMP0 - | beqz TMP1, >8 // Both args +-0: return 0. - |. lui TMP1, 0xffe0 - | dsll TMP1, TMP1, 32 - | sltu AT, TMP1, AT - | sltu TMP0, TMP1, TMP0 - | or TMP1, AT, TMP0 - | bnez TMP1, >9 // Either arg is NaN: return 0 or 1; - |. and AT, CARG1, CARG2 - | bltz AT, >5 // Both args negative? - |. nop - | jr ra - |. slt CRET1, CARG1, CARG2 - |5: // Swap conditions if both operands are negative. - | jr ra - |. slt CRET1, CARG2, CARG1 - |8: - | jr ra - |. li CRET1, 0 - |9: - | jr ra - |. move CRET1, CRET2 - |.endif - | - |// Soft-float comparison. Equivalent to c.ole.d a, b or c.ole.d b, a. - |// Input: CARG1, CARG2, TMP3. Output: CRET1. Temporaries: AT, TMP0, TMP1. - |->vm_sfcmpolex: - |.if not FPU - | dsll AT, CARG1, 1 - | dsll TMP0, CARG2, 1 - | or TMP1, AT, TMP0 - | beqz TMP1, >8 // Both args +-0: return 1. - |. lui TMP1, 0xffe0 - | dsll TMP1, TMP1, 32 - | sltu AT, TMP1, AT - | sltu TMP0, TMP1, TMP0 - | or TMP1, AT, TMP0 - | bnez TMP1, >9 // Either arg is NaN: return 0; - |. and AT, CARG1, CARG2 - | xor AT, AT, TMP3 - | bltz AT, >5 // Both args negative? - |. nop - | jr ra - |. slt CRET1, CARG2, CARG1 - |5: // Swap conditions if both operands are negative. - | jr ra - |. slt CRET1, CARG1, CARG2 - |8: - | jr ra - |. li CRET1, 1 - |9: - | jr ra - |. li CRET1, 0 - |.endif - | - |.macro sfmin_max, name, intins - |->vm_sf .. name: - |.if JIT and not FPU - | move TMP2, ra - | bal ->vm_sfcmpolt - |. nop - | move ra, TMP2 - | move TMP0, CRET1 - | move CRET1, CARG1 - | jr ra - |. intins CRET1, CARG2, TMP0 - |.endif - |.endmacro - | - | sfmin_max min, movz - | sfmin_max max, movn - | - |//----------------------------------------------------------------------- - |//-- Miscellaneous functions -------------------------------------------- - |//----------------------------------------------------------------------- - | - |//----------------------------------------------------------------------- - |//-- FFI helper functions ----------------------------------------------- - |//----------------------------------------------------------------------- - | - |// Handler for callback functions. Callback slot number in r1, g in r2. - |->vm_ffi_callback: - |.if FFI - |.type CTSTATE, CTState, PC - | saveregs - | ld CTSTATE, GL:r2->ctype_state - | daddiu DISPATCH, r2, GG_G2DISP - | load_got lj_ccallback_enter - | sw r1, CTSTATE->cb.slot - | sd CARG1, CTSTATE->cb.gpr[0] - | .FPU sdc1 FARG1, CTSTATE->cb.fpr[0] - | sd CARG2, CTSTATE->cb.gpr[1] - | .FPU sdc1 FARG2, CTSTATE->cb.fpr[1] - | sd CARG3, CTSTATE->cb.gpr[2] - | .FPU sdc1 FARG3, CTSTATE->cb.fpr[2] - | sd CARG4, CTSTATE->cb.gpr[3] - | .FPU sdc1 FARG4, CTSTATE->cb.fpr[3] - | sd CARG5, CTSTATE->cb.gpr[4] - | .FPU sdc1 FARG5, CTSTATE->cb.fpr[4] - | sd CARG6, CTSTATE->cb.gpr[5] - | .FPU sdc1 FARG6, CTSTATE->cb.fpr[5] - | sd CARG7, CTSTATE->cb.gpr[6] - | .FPU sdc1 FARG7, CTSTATE->cb.fpr[6] - | sd CARG8, CTSTATE->cb.gpr[7] - | .FPU sdc1 FARG8, CTSTATE->cb.fpr[7] - | daddiu TMP0, sp, CFRAME_SPACE - | sd TMP0, CTSTATE->cb.stack - | sd r0, SAVE_PC // Any value outside of bytecode is ok. - | move CARG2, sp - | call_intern lj_ccallback_enter // (CTState *cts, void *cf) - |. move CARG1, CTSTATE - | // Returns lua_State *. - | ld BASE, L:CRET1->base - | ld RC, L:CRET1->top - | move L, CRET1 - | .FPU lui TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float). - | ld LFUNC:RB, FRAME_FUNC(BASE) - | .FPU mtc1 TMP3, TOBIT - | li TISNIL, LJ_TNIL - | li TISNUM, LJ_TISNUM - | li_vmstate INTERP - | subu RC, RC, BASE - | cleartp LFUNC:RB - | st_vmstate - | .FPU cvt.d.s TOBIT, TOBIT - | ins_callt - |.endif - | - |->cont_ffi_callback: // Return from FFI callback. - |.if FFI - | load_got lj_ccallback_leave - | ld CTSTATE, DISPATCH_GL(ctype_state)(DISPATCH) - | sd BASE, L->base - | sd RB, L->top - | sd L, CTSTATE->L - | move CARG2, RA - | call_intern lj_ccallback_leave // (CTState *cts, TValue *o) - |. move CARG1, CTSTATE - | .FPU ldc1 FRET1, CTSTATE->cb.fpr[0] - | ld CRET1, CTSTATE->cb.gpr[0] - | .FPU ldc1 FRET2, CTSTATE->cb.fpr[1] - | b ->vm_leave_unw - |. ld CRET2, CTSTATE->cb.gpr[1] - |.endif - | - |->vm_ffi_call: // Call C function via FFI. - | // Caveat: needs special frame unwinding, see below. - |.if FFI - | .type CCSTATE, CCallState, CARG1 - | lw TMP1, CCSTATE->spadj - | lbu CARG2, CCSTATE->nsp - | move TMP2, sp - | dsubu sp, sp, TMP1 - | sd ra, -8(TMP2) - | sll CARG2, CARG2, 3 - | sd r16, -16(TMP2) - | sd CCSTATE, -24(TMP2) - | move r16, TMP2 - | daddiu TMP1, CCSTATE, offsetof(CCallState, stack) - | move TMP2, sp - | beqz CARG2, >2 - |. daddu TMP3, TMP1, CARG2 - |1: - | ld TMP0, 0(TMP1) - | daddiu TMP1, TMP1, 8 - | sltu AT, TMP1, TMP3 - | sd TMP0, 0(TMP2) - | bnez AT, <1 - |. daddiu TMP2, TMP2, 8 - |2: - | ld CFUNCADDR, CCSTATE->func - | .FPU ldc1 FARG1, CCSTATE->gpr[0] - | ld CARG2, CCSTATE->gpr[1] - | .FPU ldc1 FARG2, CCSTATE->gpr[1] - | ld CARG3, CCSTATE->gpr[2] - | .FPU ldc1 FARG3, CCSTATE->gpr[2] - | ld CARG4, CCSTATE->gpr[3] - | .FPU ldc1 FARG4, CCSTATE->gpr[3] - | ld CARG5, CCSTATE->gpr[4] - | .FPU ldc1 FARG5, CCSTATE->gpr[4] - | ld CARG6, CCSTATE->gpr[5] - | .FPU ldc1 FARG6, CCSTATE->gpr[5] - | ld CARG7, CCSTATE->gpr[6] - | .FPU ldc1 FARG7, CCSTATE->gpr[6] - | ld CARG8, CCSTATE->gpr[7] - | .FPU ldc1 FARG8, CCSTATE->gpr[7] - | jalr CFUNCADDR - |. ld CARG1, CCSTATE->gpr[0] // Do this last, since CCSTATE is CARG1. - | ld CCSTATE:TMP1, -24(r16) - | ld TMP2, -16(r16) - | ld ra, -8(r16) - | sd CRET1, CCSTATE:TMP1->gpr[0] - | sd CRET2, CCSTATE:TMP1->gpr[1] - |.if FPU - | sdc1 FRET1, CCSTATE:TMP1->fpr[0] - | sdc1 FRET2, CCSTATE:TMP1->fpr[1] - |.else - | sd CARG1, CCSTATE:TMP1->gpr[2] // 2nd FP struct field for soft-float. - |.endif - | move sp, r16 - | jr ra - |. move r16, TMP2 - |.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; - |=>defop: - - switch (op) { - - /* -- Comparison ops ---------------------------------------------------- */ - - /* Remember: all ops branch for a true comparison, fall through otherwise. */ - - case BC_ISLT: case BC_ISGE: case BC_ISLE: case BC_ISGT: - | // RA = src1*8, RD = src2*8, JMP with RD = target - |.macro bc_comp, FRA, FRD, ARGRA, ARGRD, movop, fmovop, fcomp, sfcomp - | daddu RA, BASE, RA - | daddu RD, BASE, RD - | ld ARGRA, 0(RA) - | ld ARGRD, 0(RD) - | lhu TMP2, OFS_RD(PC) - | gettp CARG3, ARGRA - | gettp CARG4, ARGRD - | bne CARG3, TISNUM, >2 - |. daddiu PC, PC, 4 - | bne CARG4, TISNUM, >5 - |. decode_RD4b TMP2 - | sextw ARGRA, ARGRA - | sextw ARGRD, ARGRD - | lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535) - | slt AT, CARG1, CARG2 - | addu TMP2, TMP2, TMP3 - | movop TMP2, r0, AT - |1: - | daddu PC, PC, TMP2 - | ins_next - | - |2: // RA is not an integer. - | sltiu AT, CARG3, LJ_TISNUM - | beqz AT, ->vmeta_comp - |. lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535) - | sltiu AT, CARG4, LJ_TISNUM - | beqz AT, >4 - |. decode_RD4b TMP2 - |.if FPU - | ldc1 FRA, 0(RA) - | ldc1 FRD, 0(RD) - |.endif - |3: // RA and RD are both numbers. - |.if FPU - | fcomp f20, f22 - | addu TMP2, TMP2, TMP3 - | b <1 - |. fmovop TMP2, r0 - |.else - | bal sfcomp - |. addu TMP2, TMP2, TMP3 - | b <1 - |. movop TMP2, r0, CRET1 - |.endif - | - |4: // RA is a number, RD is not a number. - | bne CARG4, TISNUM, ->vmeta_comp - | // RA is a number, RD is an integer. Convert RD to a number. - |.if FPU - |. lwc1 FRD, LO(RD) - | ldc1 FRA, 0(RA) - | b <3 - |. cvt.d.w FRD, FRD - |.else - |.if "ARGRD" == "CARG1" - |. sextw CARG1, CARG1 - | bal ->vm_sfi2d_1 - |. nop - |.else - |. sextw CARG2, CARG2 - | bal ->vm_sfi2d_2 - |. nop - |.endif - | b <3 - |. nop - |.endif - | - |5: // RA is an integer, RD is not an integer - | sltiu AT, CARG4, LJ_TISNUM - | beqz AT, ->vmeta_comp - |. lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535) - | // RA is an integer, RD is a number. Convert RA to a number. - |.if FPU - | lwc1 FRA, LO(RA) - | ldc1 FRD, 0(RD) - | b <3 - | cvt.d.w FRA, FRA - |.else - |.if "ARGRA" == "CARG1" - | bal ->vm_sfi2d_1 - |. sextw CARG1, CARG1 - |.else - | bal ->vm_sfi2d_2 - |. sextw CARG2, CARG2 - |.endif - | b <3 - |. nop - |.endif - |.endmacro - | - if (op == BC_ISLT) { - | bc_comp f20, f22, CARG1, CARG2, movz, movf, c.olt.d, ->vm_sfcmpolt - } else if (op == BC_ISGE) { - | bc_comp f20, f22, CARG1, CARG2, movn, movt, c.olt.d, ->vm_sfcmpolt - } else if (op == BC_ISLE) { - | bc_comp f22, f20, CARG2, CARG1, movn, movt, c.ult.d, ->vm_sfcmpult - } else { - | bc_comp f22, f20, CARG2, CARG1, movz, movf, c.ult.d, ->vm_sfcmpult - } - break; - - case BC_ISEQV: case BC_ISNEV: - vk = op == BC_ISEQV; - | // RA = src1*8, RD = src2*8, JMP with RD = target - | daddu RA, BASE, RA - | daddiu PC, PC, 4 - | daddu RD, BASE, RD - | ld CARG1, 0(RA) - | lhu TMP2, -4+OFS_RD(PC) - | ld CARG2, 0(RD) - | gettp CARG3, CARG1 - | gettp CARG4, CARG2 - | sltu AT, TISNUM, CARG3 - | sltu TMP1, TISNUM, CARG4 - | or AT, AT, TMP1 - if (vk) { - | beqz AT, ->BC_ISEQN_Z - } else { - | beqz AT, ->BC_ISNEN_Z - } - | // Either or both types are not numbers. - | lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535) - |.if FFI - |. li AT, LJ_TCDATA - | beq CARG3, AT, ->vmeta_equal_cd - |.endif - | decode_RD4b TMP2 - |.if FFI - | beq CARG4, AT, ->vmeta_equal_cd - |. nop - |.endif - | bne CARG1, CARG2, >2 - |. addu TMP2, TMP2, TMP3 - | // Tag and value are equal. - if (vk) { - |->BC_ISEQV_Z: - | daddu PC, PC, TMP2 - } - |1: - | ins_next - | - |2: // Check if the tags are the same and it's a table or userdata. - | xor AT, CARG3, CARG4 // Same type? - | sltiu TMP0, CARG3, LJ_TISTABUD+1 // Table or userdata? - | movn TMP0, r0, AT - if (vk) { - | beqz TMP0, <1 - } else { - | beqz TMP0, ->BC_ISEQV_Z // Reuse code from opposite instruction. - } - | // Different tables or userdatas. Need to check __eq metamethod. - | // Field metatable must be at same offset for GCtab and GCudata! - |. cleartp TAB:TMP1, CARG1 - | ld TAB:TMP3, TAB:TMP1->metatable - if (vk) { - | beqz TAB:TMP3, <1 // No metatable? - |. nop - | lbu TMP3, TAB:TMP3->nomm - | andi TMP3, TMP3, 1<<MM_eq - | bnez TMP3, >1 // Or 'no __eq' flag set? - } else { - | beqz TAB:TMP3,->BC_ISEQV_Z // No metatable? - |. nop - | lbu TMP3, TAB:TMP3->nomm - | andi TMP3, TMP3, 1<<MM_eq - | bnez TMP3, ->BC_ISEQV_Z // Or 'no __eq' flag set? - } - |. nop - | b ->vmeta_equal // Handle __eq metamethod. - |. li TMP0, 1-vk // ne = 0 or 1. - break; - - case BC_ISEQS: case BC_ISNES: - vk = op == BC_ISEQS; - | // RA = src*8, RD = str_const*8 (~), JMP with RD = target - | daddu RA, BASE, RA - | daddiu PC, PC, 4 - | ld CARG1, 0(RA) - | dsubu RD, KBASE, RD - | lhu TMP2, -4+OFS_RD(PC) - | ld CARG2, -8(RD) // KBASE-8-str_const*8 - |.if FFI - | gettp TMP0, CARG1 - | li AT, LJ_TCDATA - |.endif - | li TMP1, LJ_TSTR - | decode_RD4b TMP2 - |.if FFI - | beq TMP0, AT, ->vmeta_equal_cd - |.endif - |. settp CARG2, TMP1 - | lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535) - | xor TMP1, CARG1, CARG2 - | addu TMP2, TMP2, TMP3 - if (vk) { - | movn TMP2, r0, TMP1 - } else { - | movz TMP2, r0, TMP1 - } - | daddu PC, PC, TMP2 - | ins_next - break; - - case BC_ISEQN: case BC_ISNEN: - vk = op == BC_ISEQN; - | // RA = src*8, RD = num_const*8, JMP with RD = target - | daddu RA, BASE, RA - | daddu RD, KBASE, RD - | ld CARG1, 0(RA) - | ld CARG2, 0(RD) - | lhu TMP2, OFS_RD(PC) - | gettp CARG3, CARG1 - | gettp CARG4, CARG2 - | daddiu PC, PC, 4 - | lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535) - if (vk) { - |->BC_ISEQN_Z: - } else { - |->BC_ISNEN_Z: - } - | bne CARG3, TISNUM, >3 - |. decode_RD4b TMP2 - | bne CARG4, TISNUM, >6 - |. addu TMP2, TMP2, TMP3 - | xor AT, CARG1, CARG2 - if (vk) { - | movn TMP2, r0, AT - |1: - | daddu PC, PC, TMP2 - |2: - } else { - | movz TMP2, r0, AT - |1: - |2: - | daddu PC, PC, TMP2 - } - | ins_next - | - |3: // RA is not an integer. - | sltu AT, CARG3, TISNUM - |.if FFI - | beqz AT, >8 - |.else - | beqz AT, <2 - |.endif - |. addu TMP2, TMP2, TMP3 - | sltu AT, CARG4, TISNUM - |.if FPU - | ldc1 f20, 0(RA) - | ldc1 f22, 0(RD) - |.endif - | beqz AT, >5 - |. nop - |4: // RA and RD are both numbers. - |.if FPU - | c.eq.d f20, f22 - | b <1 - if (vk) { - |. movf TMP2, r0 - } else { - |. movt TMP2, r0 - } - |.else - | bal ->vm_sfcmpeq - |. nop - | b <1 - if (vk) { - |. movz TMP2, r0, CRET1 - } else { - |. movn TMP2, r0, CRET1 - } - |.endif - | - |5: // RA is a number, RD is not a number. - |.if FFI - | bne CARG4, TISNUM, >9 - |.else - | bne CARG4, TISNUM, <2 - |.endif - | // RA is a number, RD is an integer. Convert RD to a number. - |.if FPU - |. lwc1 f22, LO(RD) - | b <4 - |. cvt.d.w f22, f22 - |.else - |. sextw CARG2, CARG2 - | bal ->vm_sfi2d_2 - |. nop - | b <4 - |. nop - |.endif - | - |6: // RA is an integer, RD is not an integer - | sltu AT, CARG4, TISNUM - |.if FFI - | beqz AT, >9 - |.else - | beqz AT, <2 - |.endif - | // RA is an integer, RD is a number. Convert RA to a number. - |.if FPU - |. lwc1 f20, LO(RA) - | ldc1 f22, 0(RD) - | b <4 - | cvt.d.w f20, f20 - |.else - |. sextw CARG1, CARG1 - | bal ->vm_sfi2d_1 - |. nop - | b <4 - |. nop - |.endif - | - |.if FFI - |8: - | li AT, LJ_TCDATA - | bne CARG3, AT, <2 - |. nop - | b ->vmeta_equal_cd - |. nop - |9: - | li AT, LJ_TCDATA - | bne CARG4, AT, <2 - |. nop - | b ->vmeta_equal_cd - |. nop - |.endif - break; - - case BC_ISEQP: case BC_ISNEP: - vk = op == BC_ISEQP; - | // RA = src*8, RD = primitive_type*8 (~), JMP with RD = target - | daddu RA, BASE, RA - | srl TMP1, RD, 3 - | ld TMP0, 0(RA) - | lhu TMP2, OFS_RD(PC) - | not TMP1, TMP1 - | gettp TMP0, TMP0 - | daddiu PC, PC, 4 - |.if FFI - | li AT, LJ_TCDATA - | beq TMP0, AT, ->vmeta_equal_cd - |.endif - |. xor TMP0, TMP0, TMP1 - | decode_RD4b TMP2 - | lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535) - | addu TMP2, TMP2, TMP3 - if (vk) { - | movn TMP2, r0, TMP0 - } else { - | movz TMP2, r0, TMP0 - } - | daddu PC, PC, TMP2 - | ins_next - break; - - /* -- Unary test and copy ops ------------------------------------------- */ - - case BC_ISTC: case BC_ISFC: case BC_IST: case BC_ISF: - | // RA = dst*8 or unused, RD = src*8, JMP with RD = target - | daddu RD, BASE, RD - | lhu TMP2, OFS_RD(PC) - | ld TMP0, 0(RD) - | daddiu PC, PC, 4 - | gettp TMP0, TMP0 - | sltiu TMP0, TMP0, LJ_TISTRUECOND - if (op == BC_IST || op == BC_ISF) { - | decode_RD4b TMP2 - | lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535) - | addu TMP2, TMP2, TMP3 - if (op == BC_IST) { - | movz TMP2, r0, TMP0 - } else { - | movn TMP2, r0, TMP0 - } - | daddu PC, PC, TMP2 - } else { - | ld CRET1, 0(RD) - if (op == BC_ISTC) { - | beqz TMP0, >1 - } else { - | bnez TMP0, >1 - } - |. daddu RA, BASE, RA - | decode_RD4b TMP2 - | lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535) - | addu TMP2, TMP2, TMP3 - | sd CRET1, 0(RA) - | daddu PC, PC, TMP2 - |1: - } - | ins_next - break; - - case BC_ISTYPE: - | // RA = src*8, RD = -type*8 - | daddu TMP2, BASE, RA - | srl TMP1, RD, 3 - | ld TMP0, 0(TMP2) - | ins_next1 - | gettp TMP0, TMP0 - | daddu AT, TMP0, TMP1 - | bnez AT, ->vmeta_istype - |. ins_next2 - break; - case BC_ISNUM: - | // RA = src*8, RD = -(TISNUM-1)*8 - | daddu TMP2, BASE, RA - | ld TMP0, 0(TMP2) - | ins_next1 - | checknum TMP0, ->vmeta_istype - |. ins_next2 - break; - - /* -- Unary ops --------------------------------------------------------- */ - - case BC_MOV: - | // RA = dst*8, RD = src*8 - | daddu RD, BASE, RD - | daddu RA, BASE, RA - | ld CRET1, 0(RD) - | ins_next1 - | sd CRET1, 0(RA) - | ins_next2 - break; - case BC_NOT: - | // RA = dst*8, RD = src*8 - | daddu RD, BASE, RD - | daddu RA, BASE, RA - | ld TMP0, 0(RD) - | li AT, LJ_TTRUE - | gettp TMP0, TMP0 - | sltu TMP0, AT, TMP0 - | addiu TMP0, TMP0, 1 - | dsll TMP0, TMP0, 47 - | not TMP0, TMP0 - | ins_next1 - | sd TMP0, 0(RA) - | ins_next2 - break; - case BC_UNM: - | // RA = dst*8, RD = src*8 - | daddu RB, BASE, RD - | ld CARG1, 0(RB) - | daddu RA, BASE, RA - | gettp CARG3, CARG1 - | bne CARG3, TISNUM, >2 - |. lui TMP1, 0x8000 - | sextw CARG1, CARG1 - | beq CARG1, TMP1, ->vmeta_unm // Meta handler deals with -2^31. - |. negu CARG1, CARG1 - | zextw CARG1, CARG1 - | settp CARG1, TISNUM - |1: - | ins_next1 - | sd CARG1, 0(RA) - | ins_next2 - |2: - | sltiu AT, CARG3, LJ_TISNUM - | beqz AT, ->vmeta_unm - |. dsll TMP1, TMP1, 32 - | b <1 - |. xor CARG1, CARG1, TMP1 - break; - case BC_LEN: - | // RA = dst*8, RD = src*8 - | daddu CARG2, BASE, RD - | daddu RA, BASE, RA - | ld TMP0, 0(CARG2) - | gettp TMP1, TMP0 - | daddiu AT, TMP1, -LJ_TSTR - | bnez AT, >2 - |. cleartp STR:CARG1, TMP0 - | lw CRET1, STR:CARG1->len - |1: - | settp CRET1, TISNUM - | ins_next1 - | sd CRET1, 0(RA) - | ins_next2 - |2: - | daddiu AT, TMP1, -LJ_TTAB - | bnez AT, ->vmeta_len - |. nop -#if LJ_52 - | ld TAB:TMP2, TAB:CARG1->metatable - | bnez TAB:TMP2, >9 - |. nop - |3: -#endif - |->BC_LEN_Z: - | load_got lj_tab_len - | call_intern lj_tab_len // (GCtab *t) - |. nop - | // Returns uint32_t (but less than 2^31). - | b <1 - |. nop -#if LJ_52 - |9: - | lbu TMP0, TAB:TMP2->nomm - | andi TMP0, TMP0, 1<<MM_len - | bnez TMP0, <3 // 'no __len' flag set: done. - |. nop - | b ->vmeta_len - |. nop -#endif - break; - - /* -- Binary ops -------------------------------------------------------- */ - - |.macro fpmod, a, b, c - | bal ->vm_floor // floor(b/c) - |. div.d FARG1, b, c - | mul.d a, FRET1, c - | sub.d a, b, a // b - floor(b/c)*c - |.endmacro - - |.macro sfpmod - | daddiu sp, sp, -16 - | - | load_got __divdf3 - | sd CARG1, 0(sp) - | call_extern - |. sd CARG2, 8(sp) - | - | load_got floor - | call_extern - |. move CARG1, CRET1 - | - | load_got __muldf3 - | move CARG1, CRET1 - | call_extern - |. ld CARG2, 8(sp) - | - | load_got __subdf3 - | ld CARG1, 0(sp) - | call_extern - |. move CARG2, CRET1 - | - | daddiu sp, sp, 16 - |.endmacro - - |.macro ins_arithpre, label - ||vk = ((int)op - BC_ADDVN) / (BC_ADDNV-BC_ADDVN); - | // RA = dst*8, RB = src1*8, RC = src2*8 | num_const*8 - ||switch (vk) { - ||case 0: - | decode_RB8a RB, INS - | decode_RB8b RB - | decode_RDtoRC8 RC, RD - | // RA = dst*8, RB = src1*8, RC = num_const*8 - | daddu RB, BASE, RB - |.if "label" ~= "none" - | b label - |.endif - |. daddu RC, KBASE, RC - || break; - ||case 1: - | decode_RB8a RC, INS - | decode_RB8b RC - | decode_RDtoRC8 RB, RD - | // RA = dst*8, RB = num_const*8, RC = src1*8 - | daddu RC, BASE, RC - |.if "label" ~= "none" - | b label - |.endif - |. daddu RB, KBASE, RB - || break; - ||default: - | decode_RB8a RB, INS - | decode_RB8b RB - | decode_RDtoRC8 RC, RD - | // RA = dst*8, RB = src1*8, RC = src2*8 - | daddu RB, BASE, RB - |.if "label" ~= "none" - | b label - |.endif - |. daddu RC, BASE, RC - || break; - ||} - |.endmacro - | - |.macro ins_arith, intins, fpins, fpcall, label - | ins_arithpre none - | - |.if "label" ~= "none" - |label: - |.endif - | - |// Used in 5. - | ld CARG1, 0(RB) - | ld CARG2, 0(RC) - | gettp TMP0, CARG1 - | gettp TMP1, CARG2 - | - |.if "intins" ~= "div" - | - | // Check for two integers. - | sextw CARG3, CARG1 - | bne TMP0, TISNUM, >5 - |. sextw CARG4, CARG2 - | bne TMP1, TISNUM, >5 - | - |.if "intins" == "addu" - |. intins CRET1, CARG3, CARG4 - | xor TMP1, CRET1, CARG3 // ((y^a) & (y^b)) < 0: overflow. - | xor TMP2, CRET1, CARG4 - | and TMP1, TMP1, TMP2 - | bltz TMP1, ->vmeta_arith - |. daddu RA, BASE, RA - |.elif "intins" == "subu" - |. intins CRET1, CARG3, CARG4 - | xor TMP1, CRET1, CARG3 // ((y^a) & (a^b)) < 0: overflow. - | xor TMP2, CARG3, CARG4 - | and TMP1, TMP1, TMP2 - | bltz TMP1, ->vmeta_arith - |. daddu RA, BASE, RA - |.elif "intins" == "mult" - |. intins CARG3, CARG4 - | mflo CRET1 - | mfhi TMP2 - | sra TMP1, CRET1, 31 - | bne TMP1, TMP2, ->vmeta_arith - |. daddu RA, BASE, RA - |.else - |. load_got lj_vm_modi - | beqz CARG4, ->vmeta_arith - |. daddu RA, BASE, RA - | move CARG1, CARG3 - | call_extern - |. move CARG2, CARG4 - |.endif - | - | zextw CRET1, CRET1 - | settp CRET1, TISNUM - | ins_next1 - | sd CRET1, 0(RA) - |3: - | ins_next2 - | - |.endif - | - |5: // Check for two numbers. - | .FPU ldc1 f20, 0(RB) - | sltu AT, TMP0, TISNUM - | sltu TMP0, TMP1, TISNUM - | .FPU ldc1 f22, 0(RC) - | and AT, AT, TMP0 - | beqz AT, ->vmeta_arith - |. daddu RA, BASE, RA - | - |.if FPU - | fpins FRET1, f20, f22 - |.elif "fpcall" == "sfpmod" - | sfpmod - |.else - | load_got fpcall - | call_extern - |. nop - |.endif - | - | ins_next1 - |.if "intins" ~= "div" - | b <3 - |.endif - |.if FPU - |. sdc1 FRET1, 0(RA) - |.else - |. sd CRET1, 0(RA) - |.endif - |.if "intins" == "div" - | ins_next2 - |.endif - | - |.endmacro - - case BC_ADDVN: case BC_ADDNV: case BC_ADDVV: - | ins_arith addu, add.d, __adddf3, none - break; - case BC_SUBVN: case BC_SUBNV: case BC_SUBVV: - | ins_arith subu, sub.d, __subdf3, none - break; - case BC_MULVN: case BC_MULNV: case BC_MULVV: - | ins_arith mult, mul.d, __muldf3, none - break; - case BC_DIVVN: - | ins_arith div, div.d, __divdf3, ->BC_DIVVN_Z - break; - case BC_DIVNV: case BC_DIVVV: - | ins_arithpre ->BC_DIVVN_Z - break; - case BC_MODVN: - | ins_arith modi, fpmod, sfpmod, ->BC_MODVN_Z - break; - case BC_MODNV: case BC_MODVV: - | ins_arithpre ->BC_MODVN_Z - break; - case BC_POW: - | ins_arithpre none - | ld CARG1, 0(RB) - | ld CARG2, 0(RC) - | gettp TMP0, CARG1 - | gettp TMP1, CARG2 - | sltiu TMP0, TMP0, LJ_TISNUM - | sltiu TMP1, TMP1, LJ_TISNUM - | and AT, TMP0, TMP1 - | load_got pow - | beqz AT, ->vmeta_arith - |. daddu RA, BASE, RA - |.if FPU - | ldc1 FARG1, 0(RB) - | ldc1 FARG2, 0(RC) - |.endif - | call_extern - |. nop - | ins_next1 - |.if FPU - | sdc1 FRET1, 0(RA) - |.else - | sd CRET1, 0(RA) - |.endif - | ins_next2 - break; - - case BC_CAT: - | // RA = dst*8, RB = src_start*8, RC = src_end*8 - | decode_RB8a RB, INS - | decode_RB8b RB - | decode_RDtoRC8 RC, RD - | dsubu CARG3, RC, RB - | sd BASE, L->base - | daddu CARG2, BASE, RC - | move MULTRES, RB - |->BC_CAT_Z: - | load_got lj_meta_cat - | srl CARG3, CARG3, 3 - | sd PC, SAVE_PC - | call_intern lj_meta_cat // (lua_State *L, TValue *top, int left) - |. move CARG1, L - | // Returns NULL (finished) or TValue * (metamethod). - | bnez CRET1, ->vmeta_binop - |. ld BASE, L->base - | daddu RB, BASE, MULTRES - | ld CRET1, 0(RB) - | daddu RA, BASE, RA - | ins_next1 - | sd CRET1, 0(RA) - | ins_next2 - break; - - /* -- Constant ops ------------------------------------------------------ */ - - case BC_KSTR: - | // RA = dst*8, RD = str_const*8 (~) - | dsubu TMP1, KBASE, RD - | ins_next1 - | li TMP2, LJ_TSTR - | ld TMP0, -8(TMP1) // KBASE-8-str_const*8 - | daddu RA, BASE, RA - | settp TMP0, TMP2 - | sd TMP0, 0(RA) - | ins_next2 - break; - case BC_KCDATA: - |.if FFI - | // RA = dst*8, RD = cdata_const*8 (~) - | dsubu TMP1, KBASE, RD - | ins_next1 - | ld TMP0, -8(TMP1) // KBASE-8-cdata_const*8 - | li TMP2, LJ_TCDATA - | daddu RA, BASE, RA - | settp TMP0, TMP2 - | sd TMP0, 0(RA) - | ins_next2 - |.endif - break; - case BC_KSHORT: - | // RA = dst*8, RD = int16_literal*8 - | sra RD, INS, 16 - | daddu RA, BASE, RA - | zextw RD, RD - | ins_next1 - | settp RD, TISNUM - | sd RD, 0(RA) - | ins_next2 - break; - case BC_KNUM: - | // RA = dst*8, RD = num_const*8 - | daddu RD, KBASE, RD - | daddu RA, BASE, RA - | ld CRET1, 0(RD) - | ins_next1 - | sd CRET1, 0(RA) - | ins_next2 - break; - case BC_KPRI: - | // RA = dst*8, RD = primitive_type*8 (~) - | daddu RA, BASE, RA - | dsll TMP0, RD, 44 - | not TMP0, TMP0 - | ins_next1 - | sd TMP0, 0(RA) - | ins_next2 - break; - case BC_KNIL: - | // RA = base*8, RD = end*8 - | daddu RA, BASE, RA - | sd TISNIL, 0(RA) - | daddiu RA, RA, 8 - | daddu RD, BASE, RD - |1: - | sd TISNIL, 0(RA) - | slt AT, RA, RD - | bnez AT, <1 - |. daddiu RA, RA, 8 - | ins_next_ - break; - - /* -- Upvalue and function ops ------------------------------------------ */ - - case BC_UGET: - | // RA = dst*8, RD = uvnum*8 - | ld LFUNC:RB, FRAME_FUNC(BASE) - | daddu RA, BASE, RA - | cleartp LFUNC:RB - | daddu RD, RD, LFUNC:RB - | ld UPVAL:RB, LFUNC:RD->uvptr - | ins_next1 - | ld TMP1, UPVAL:RB->v - | ld CRET1, 0(TMP1) - | sd CRET1, 0(RA) - | ins_next2 - break; - case BC_USETV: - | // RA = uvnum*8, RD = src*8 - | ld LFUNC:RB, FRAME_FUNC(BASE) - | daddu RD, BASE, RD - | cleartp LFUNC:RB - | daddu RA, RA, LFUNC:RB - | ld UPVAL:RB, LFUNC:RA->uvptr - | ld CRET1, 0(RD) - | lbu TMP3, UPVAL:RB->marked - | ld CARG2, UPVAL:RB->v - | andi TMP3, TMP3, LJ_GC_BLACK // isblack(uv) - | lbu TMP0, UPVAL:RB->closed - | gettp TMP2, CRET1 - | sd CRET1, 0(CARG2) - | li AT, LJ_GC_BLACK|1 - | or TMP3, TMP3, TMP0 - | beq TMP3, AT, >2 // Upvalue is closed and black? - |. daddiu TMP2, TMP2, -(LJ_TNUMX+1) - |1: - | ins_next - | - |2: // Check if new value is collectable. - | sltiu AT, TMP2, LJ_TISGCV - (LJ_TNUMX+1) - | beqz AT, <1 // tvisgcv(v) - |. cleartp GCOBJ:CRET1, CRET1 - | lbu TMP3, GCOBJ:CRET1->gch.marked - | andi TMP3, TMP3, LJ_GC_WHITES // iswhite(v) - | beqz TMP3, <1 - |. load_got lj_gc_barrieruv - | // Crossed a write barrier. Move the barrier forward. - | call_intern lj_gc_barrieruv // (global_State *g, TValue *tv) - |. daddiu CARG1, DISPATCH, GG_DISP2G - | b <1 - |. nop - break; - case BC_USETS: - | // RA = uvnum*8, RD = str_const*8 (~) - | ld LFUNC:RB, FRAME_FUNC(BASE) - | dsubu TMP1, KBASE, RD - | cleartp LFUNC:RB - | daddu RA, RA, LFUNC:RB - | ld UPVAL:RB, LFUNC:RA->uvptr - | ld STR:TMP1, -8(TMP1) // KBASE-8-str_const*8 - | lbu TMP2, UPVAL:RB->marked - | ld CARG2, UPVAL:RB->v - | lbu TMP3, STR:TMP1->marked - | andi AT, TMP2, LJ_GC_BLACK // isblack(uv) - | lbu TMP2, UPVAL:RB->closed - | li TMP0, LJ_TSTR - | settp TMP1, TMP0 - | bnez AT, >2 - |. sd TMP1, 0(CARG2) - |1: - | ins_next - | - |2: // Check if string is white and ensure upvalue is closed. - | beqz TMP2, <1 - |. andi AT, TMP3, LJ_GC_WHITES // iswhite(str) - | beqz AT, <1 - |. load_got lj_gc_barrieruv - | // Crossed a write barrier. Move the barrier forward. - | call_intern lj_gc_barrieruv // (global_State *g, TValue *tv) - |. daddiu CARG1, DISPATCH, GG_DISP2G - | b <1 - |. nop - break; - case BC_USETN: - | // RA = uvnum*8, RD = num_const*8 - | ld LFUNC:RB, FRAME_FUNC(BASE) - | daddu RD, KBASE, RD - | cleartp LFUNC:RB - | daddu RA, RA, LFUNC:RB - | ld UPVAL:RB, LFUNC:RA->uvptr - | ld CRET1, 0(RD) - | ld TMP1, UPVAL:RB->v - | ins_next1 - | sd CRET1, 0(TMP1) - | ins_next2 - break; - case BC_USETP: - | // RA = uvnum*8, RD = primitive_type*8 (~) - | ld LFUNC:RB, FRAME_FUNC(BASE) - | dsll TMP0, RD, 44 - | cleartp LFUNC:RB - | daddu RA, RA, LFUNC:RB - | not TMP0, TMP0 - | ld UPVAL:RB, LFUNC:RA->uvptr - | ins_next1 - | ld TMP1, UPVAL:RB->v - | sd TMP0, 0(TMP1) - | ins_next2 - break; - - case BC_UCLO: - | // RA = level*8, RD = target - | ld TMP2, L->openupval - | branch_RD // Do this first since RD is not saved. - | load_got lj_func_closeuv - | sd BASE, L->base - | beqz TMP2, >1 - |. move CARG1, L - | call_intern lj_func_closeuv // (lua_State *L, TValue *level) - |. daddu CARG2, BASE, RA - | ld BASE, L->base - |1: - | ins_next - break; - - case BC_FNEW: - | // RA = dst*8, RD = proto_const*8 (~) (holding function prototype) - | load_got lj_func_newL_gc - | dsubu TMP1, KBASE, RD - | ld CARG3, FRAME_FUNC(BASE) - | ld CARG2, -8(TMP1) // KBASE-8-tab_const*8 - | sd BASE, L->base - | sd PC, SAVE_PC - | cleartp CARG3 - | // (lua_State *L, GCproto *pt, GCfuncL *parent) - | call_intern lj_func_newL_gc - |. move CARG1, L - | // Returns GCfuncL *. - | li TMP0, LJ_TFUNC - | ld BASE, L->base - | ins_next1 - | settp CRET1, TMP0 - | daddu RA, BASE, RA - | sd CRET1, 0(RA) - | ins_next2 - break; - - /* -- Table ops --------------------------------------------------------- */ - - case BC_TNEW: - case BC_TDUP: - | // RA = dst*8, RD = (hbits|asize)*8 | tab_const*8 (~) - | ld TMP0, DISPATCH_GL(gc.total)(DISPATCH) - | ld TMP1, DISPATCH_GL(gc.threshold)(DISPATCH) - | sd BASE, L->base - | sd PC, SAVE_PC - | sltu AT, TMP0, TMP1 - | beqz AT, >5 - |1: - if (op == BC_TNEW) { - | load_got lj_tab_new - | srl CARG2, RD, 3 - | andi CARG2, CARG2, 0x7ff - | li TMP0, 0x801 - | addiu AT, CARG2, -0x7ff - | srl CARG3, RD, 14 - | movz CARG2, TMP0, AT - | // (lua_State *L, int32_t asize, uint32_t hbits) - | call_intern lj_tab_new - |. move CARG1, L - | // Returns Table *. - } else { - | load_got lj_tab_dup - | dsubu TMP1, KBASE, RD - | move CARG1, L - | call_intern lj_tab_dup // (lua_State *L, Table *kt) - |. ld CARG2, -8(TMP1) // KBASE-8-str_const*8 - | // Returns Table *. - } - | li TMP0, LJ_TTAB - | ld BASE, L->base - | ins_next1 - | daddu RA, BASE, RA - | settp CRET1, TMP0 - | sd CRET1, 0(RA) - | ins_next2 - |5: - | load_got lj_gc_step_fixtop - | move MULTRES, RD - | call_intern lj_gc_step_fixtop // (lua_State *L) - |. move CARG1, L - | b <1 - |. move RD, MULTRES - break; - - case BC_GGET: - | // RA = dst*8, RD = str_const*8 (~) - case BC_GSET: - | // RA = src*8, RD = str_const*8 (~) - | ld LFUNC:TMP2, FRAME_FUNC(BASE) - | dsubu TMP1, KBASE, RD - | ld STR:RC, -8(TMP1) // KBASE-8-str_const*8 - | cleartp LFUNC:TMP2 - | ld TAB:RB, LFUNC:TMP2->env - if (op == BC_GGET) { - | b ->BC_TGETS_Z - } else { - | b ->BC_TSETS_Z - } - |. daddu RA, BASE, RA - break; - - case BC_TGETV: - | // RA = dst*8, RB = table*8, RC = key*8 - | decode_RB8a RB, INS - | decode_RB8b RB - | decode_RDtoRC8 RC, RD - | daddu CARG2, BASE, RB - | daddu CARG3, BASE, RC - | ld TAB:RB, 0(CARG2) - | ld TMP2, 0(CARG3) - | daddu RA, BASE, RA - | checktab TAB:RB, ->vmeta_tgetv - | gettp TMP3, TMP2 - | bne TMP3, TISNUM, >5 // Integer key? - |. lw TMP0, TAB:RB->asize - | sextw TMP2, TMP2 - | ld TMP1, TAB:RB->array - | sltu AT, TMP2, TMP0 - | sll TMP2, TMP2, 3 - | beqz AT, ->vmeta_tgetv // Integer key and in array part? - |. daddu TMP2, TMP1, TMP2 - | ld AT, 0(TMP2) - | beq AT, TISNIL, >2 - |. ld CRET1, 0(TMP2) - |1: - | ins_next1 - | sd CRET1, 0(RA) - | ins_next2 - | - |2: // Check for __index if table value is nil. - | ld TAB:TMP2, TAB:RB->metatable - | beqz TAB:TMP2, <1 // No metatable: done. - |. nop - | lbu TMP0, TAB:TMP2->nomm - | andi TMP0, TMP0, 1<<MM_index - | bnez TMP0, <1 // 'no __index' flag set: done. - |. nop - | b ->vmeta_tgetv - |. nop - | - |5: - | li AT, LJ_TSTR - | bne TMP3, AT, ->vmeta_tgetv - |. cleartp RC, TMP2 - | b ->BC_TGETS_Z // String key? - |. nop - break; - case BC_TGETS: - | // RA = dst*8, RB = table*8, RC = str_const*8 (~) - | decode_RB8a RB, INS - | decode_RB8b RB - | decode_RC8a RC, INS - | daddu CARG2, BASE, RB - | decode_RC8b RC - | ld TAB:RB, 0(CARG2) - | dsubu CARG3, KBASE, RC - | daddu RA, BASE, RA - | ld STR:RC, -8(CARG3) // KBASE-8-str_const*8 - | checktab TAB:RB, ->vmeta_tgets1 - |->BC_TGETS_Z: - | // TAB:RB = GCtab *, STR:RC = GCstr *, RA = dst*8 - | lw TMP0, TAB:RB->hmask - | lw TMP1, STR:RC->hash - | ld NODE:TMP2, TAB:RB->node - | and TMP1, TMP1, TMP0 // idx = str->hash & tab->hmask - | sll TMP0, TMP1, 5 - | sll TMP1, TMP1, 3 - | subu TMP1, TMP0, TMP1 - | li TMP3, LJ_TSTR - | daddu NODE:TMP2, NODE:TMP2, TMP1 // node = tab->node + (idx*32-idx*8) - | settp STR:RC, TMP3 // Tagged key to look for. - |1: - | ld CARG1, NODE:TMP2->key - | ld CRET1, NODE:TMP2->val - | ld NODE:TMP1, NODE:TMP2->next - | bne CARG1, RC, >4 - |. ld TAB:TMP3, TAB:RB->metatable - | beq CRET1, TISNIL, >5 // Key found, but nil value? - |. nop - |3: - | ins_next1 - | sd CRET1, 0(RA) - | ins_next2 - | - |4: // Follow hash chain. - | bnez NODE:TMP1, <1 - |. move NODE:TMP2, NODE:TMP1 - | // End of hash chain: key not found, nil result. - | - |5: // Check for __index if table value is nil. - | beqz TAB:TMP3, <3 // No metatable: done. - |. move CRET1, TISNIL - | lbu TMP0, TAB:TMP3->nomm - | andi TMP0, TMP0, 1<<MM_index - | bnez TMP0, <3 // 'no __index' flag set: done. - |. nop - | b ->vmeta_tgets - |. nop - break; - case BC_TGETB: - | // RA = dst*8, RB = table*8, RC = index*8 - | decode_RB8a RB, INS - | decode_RB8b RB - | daddu CARG2, BASE, RB - | decode_RDtoRC8 RC, RD - | ld TAB:RB, 0(CARG2) - | daddu RA, BASE, RA - | srl TMP0, RC, 3 - | checktab TAB:RB, ->vmeta_tgetb - | lw TMP1, TAB:RB->asize - | ld TMP2, TAB:RB->array - | sltu AT, TMP0, TMP1 - | beqz AT, ->vmeta_tgetb - |. daddu RC, TMP2, RC - | ld AT, 0(RC) - | beq AT, TISNIL, >5 - |. ld CRET1, 0(RC) - |1: - | ins_next1 - | sd CRET1, 0(RA) - | ins_next2 - | - |5: // Check for __index if table value is nil. - | ld TAB:TMP2, TAB:RB->metatable - | beqz TAB:TMP2, <1 // No metatable: done. - |. nop - | lbu TMP1, TAB:TMP2->nomm - | andi TMP1, TMP1, 1<<MM_index - | bnez TMP1, <1 // 'no __index' flag set: done. - |. nop - | b ->vmeta_tgetb // Caveat: preserve TMP0 and CARG2! - |. nop - break; - case BC_TGETR: - | // RA = dst*8, RB = table*8, RC = key*8 - | decode_RB8a RB, INS - | decode_RB8b RB - | decode_RDtoRC8 RC, RD - | daddu RB, BASE, RB - | daddu RC, BASE, RC - | ld TAB:CARG1, 0(RB) - | lw CARG2, LO(RC) - | daddu RA, BASE, RA - | cleartp TAB:CARG1 - | lw TMP0, TAB:CARG1->asize - | ld TMP1, TAB:CARG1->array - | sltu AT, CARG2, TMP0 - | sll TMP2, CARG2, 3 - | beqz AT, ->vmeta_tgetr // In array part? - |. daddu CRET1, TMP1, TMP2 - | ld CARG2, 0(CRET1) - |->BC_TGETR_Z: - | ins_next1 - | sd CARG2, 0(RA) - | ins_next2 - break; - - case BC_TSETV: - | // RA = src*8, RB = table*8, RC = key*8 - | decode_RB8a RB, INS - | decode_RB8b RB - | decode_RDtoRC8 RC, RD - | daddu CARG2, BASE, RB - | daddu CARG3, BASE, RC - | ld RB, 0(CARG2) - | ld TMP2, 0(CARG3) - | daddu RA, BASE, RA - | checktab RB, ->vmeta_tsetv - | checkint TMP2, >5 - |. sextw RC, TMP2 - | lw TMP0, TAB:RB->asize - | ld TMP1, TAB:RB->array - | sltu AT, RC, TMP0 - | sll TMP2, RC, 3 - | beqz AT, ->vmeta_tsetv // Integer key and in array part? - |. daddu TMP1, TMP1, TMP2 - | ld TMP0, 0(TMP1) - | lbu TMP3, TAB:RB->marked - | beq TMP0, TISNIL, >3 - |. ld CRET1, 0(RA) - |1: - | andi AT, TMP3, LJ_GC_BLACK // isblack(table) - | bnez AT, >7 - |. sd CRET1, 0(TMP1) - |2: - | ins_next - | - |3: // Check for __newindex if previous value is nil. - | ld TAB:TMP2, TAB:RB->metatable - | beqz TAB:TMP2, <1 // No metatable: done. - |. nop - | lbu TMP2, TAB:TMP2->nomm - | andi TMP2, TMP2, 1<<MM_newindex - | bnez TMP2, <1 // 'no __newindex' flag set: done. - |. nop - | b ->vmeta_tsetv - |. nop - | - |5: - | gettp AT, TMP2 - | daddiu AT, AT, -LJ_TSTR - | bnez AT, ->vmeta_tsetv - |. nop - | b ->BC_TSETS_Z // String key? - |. cleartp STR:RC, TMP2 - | - |7: // Possible table write barrier for the value. Skip valiswhite check. - | barrierback TAB:RB, TMP3, TMP0, <2 - break; - case BC_TSETS: - | // RA = src*8, RB = table*8, RC = str_const*8 (~) - | decode_RB8a RB, INS - | decode_RB8b RB - | daddu CARG2, BASE, RB - | decode_RC8a RC, INS - | ld TAB:RB, 0(CARG2) - | decode_RC8b RC - | dsubu CARG3, KBASE, RC - | ld RC, -8(CARG3) // KBASE-8-str_const*8 - | daddu RA, BASE, RA - | cleartp STR:RC - | checktab TAB:RB, ->vmeta_tsets1 - |->BC_TSETS_Z: - | // TAB:RB = GCtab *, STR:RC = GCstr *, RA = BASE+src*8 - | lw TMP0, TAB:RB->hmask - | lw TMP1, STR:RC->hash - | ld NODE:TMP2, TAB:RB->node - | sb r0, TAB:RB->nomm // Clear metamethod cache. - | and TMP1, TMP1, TMP0 // idx = str->hash & tab->hmask - | sll TMP0, TMP1, 5 - | sll TMP1, TMP1, 3 - | subu TMP1, TMP0, TMP1 - | li TMP3, LJ_TSTR - | daddu NODE:TMP2, NODE:TMP2, TMP1 // node = tab->node + (idx*32-idx*8) - | settp STR:RC, TMP3 // Tagged key to look for. - |.if FPU - | ldc1 f20, 0(RA) - |.else - | ld CRET1, 0(RA) - |.endif - |1: - | ld TMP0, NODE:TMP2->key - | ld CARG2, NODE:TMP2->val - | ld NODE:TMP1, NODE:TMP2->next - | bne TMP0, RC, >5 - |. lbu TMP3, TAB:RB->marked - | beq CARG2, TISNIL, >4 // Key found, but nil value? - |. ld TAB:TMP0, TAB:RB->metatable - |2: - | andi AT, TMP3, LJ_GC_BLACK // isblack(table) - | bnez AT, >7 - |.if FPU - |. sdc1 f20, NODE:TMP2->val - |.else - |. sd CRET1, NODE:TMP2->val - |.endif - |3: - | ins_next - | - |4: // Check for __newindex if previous value is nil. - | beqz TAB:TMP0, <2 // No metatable: done. - |. nop - | lbu TMP0, TAB:TMP0->nomm - | andi TMP0, TMP0, 1<<MM_newindex - | bnez TMP0, <2 // 'no __newindex' flag set: done. - |. nop - | b ->vmeta_tsets - |. nop - | - |5: // Follow hash chain. - | bnez NODE:TMP1, <1 - |. move NODE:TMP2, NODE:TMP1 - | // End of hash chain: key not found, add a new one - | - | // But check for __newindex first. - | ld TAB:TMP2, TAB:RB->metatable - | beqz TAB:TMP2, >6 // No metatable: continue. - |. daddiu CARG3, DISPATCH, DISPATCH_GL(tmptv) - | lbu TMP0, TAB:TMP2->nomm - | andi TMP0, TMP0, 1<<MM_newindex - | beqz TMP0, ->vmeta_tsets // 'no __newindex' flag NOT set: check. - |6: - | load_got lj_tab_newkey - | sd RC, 0(CARG3) - | sd BASE, L->base - | move CARG2, TAB:RB - | sd PC, SAVE_PC - | call_intern lj_tab_newkey // (lua_State *L, GCtab *t, TValue *k - |. move CARG1, L - | // Returns TValue *. - | ld BASE, L->base - |.if FPU - | b <3 // No 2nd write barrier needed. - |. sdc1 f20, 0(CRET1) - |.else - | ld CARG1, 0(RA) - | b <3 // No 2nd write barrier needed. - |. sd CARG1, 0(CRET1) - |.endif - | - |7: // Possible table write barrier for the value. Skip valiswhite check. - | barrierback TAB:RB, TMP3, TMP0, <3 - break; - case BC_TSETB: - | // RA = src*8, RB = table*8, RC = index*8 - | decode_RB8a RB, INS - | decode_RB8b RB - | daddu CARG2, BASE, RB - | decode_RDtoRC8 RC, RD - | ld TAB:RB, 0(CARG2) - | daddu RA, BASE, RA - | srl TMP0, RC, 3 - | checktab RB, ->vmeta_tsetb - | lw TMP1, TAB:RB->asize - | ld TMP2, TAB:RB->array - | sltu AT, TMP0, TMP1 - | beqz AT, ->vmeta_tsetb - |. daddu RC, TMP2, RC - | ld TMP1, 0(RC) - | lbu TMP3, TAB:RB->marked - | beq TMP1, TISNIL, >5 - |1: - |. ld CRET1, 0(RA) - | andi AT, TMP3, LJ_GC_BLACK // isblack(table) - | bnez AT, >7 - |. sd CRET1, 0(RC) - |2: - | ins_next - | - |5: // Check for __newindex if previous value is nil. - | ld TAB:TMP2, TAB:RB->metatable - | beqz TAB:TMP2, <1 // No metatable: done. - |. nop - | lbu TMP1, TAB:TMP2->nomm - | andi TMP1, TMP1, 1<<MM_newindex - | bnez TMP1, <1 // 'no __newindex' flag set: done. - |. nop - | b ->vmeta_tsetb // Caveat: preserve TMP0 and CARG2! - |. nop - | - |7: // Possible table write barrier for the value. Skip valiswhite check. - | barrierback TAB:RB, TMP3, TMP0, <2 - break; - case BC_TSETR: - | // RA = dst*8, RB = table*8, RC = key*8 - | decode_RB8a RB, INS - | decode_RB8b RB - | decode_RDtoRC8 RC, RD - | daddu CARG1, BASE, RB - | daddu CARG3, BASE, RC - | ld TAB:CARG2, 0(CARG1) - | lw CARG3, LO(CARG3) - | cleartp TAB:CARG2 - | lbu TMP3, TAB:CARG2->marked - | lw TMP0, TAB:CARG2->asize - | ld TMP1, TAB:CARG2->array - | andi AT, TMP3, LJ_GC_BLACK // isblack(table) - | bnez AT, >7 - |. daddu RA, BASE, RA - |2: - | sltu AT, CARG3, TMP0 - | sll TMP2, CARG3, 3 - | beqz AT, ->vmeta_tsetr // In array part? - |. daddu CRET1, TMP1, TMP2 - |->BC_TSETR_Z: - | ld CARG1, 0(RA) - | ins_next1 - | sd CARG1, 0(CRET1) - | ins_next2 - | - |7: // Possible table write barrier for the value. Skip valiswhite check. - | barrierback TAB:CARG2, TMP3, CRET1, <2 - break; - - case BC_TSETM: - | // RA = base*8 (table at base-1), RD = num_const*8 (start index) - | daddu RA, BASE, RA - |1: - | daddu TMP3, KBASE, RD - | ld TAB:CARG2, -8(RA) // Guaranteed to be a table. - | addiu TMP0, MULTRES, -8 - | lw TMP3, LO(TMP3) // Integer constant is in lo-word. - | beqz TMP0, >4 // Nothing to copy? - |. srl CARG3, TMP0, 3 - | cleartp CARG2 - | addu CARG3, CARG3, TMP3 - | lw TMP2, TAB:CARG2->asize - | sll TMP1, TMP3, 3 - | lbu TMP3, TAB:CARG2->marked - | ld CARG1, TAB:CARG2->array - | sltu AT, TMP2, CARG3 - | bnez AT, >5 - |. daddu TMP2, RA, TMP0 - | daddu TMP1, TMP1, CARG1 - | andi TMP0, TMP3, LJ_GC_BLACK // isblack(table) - |3: // Copy result slots to table. - | ld CRET1, 0(RA) - | daddiu RA, RA, 8 - | sltu AT, RA, TMP2 - | sd CRET1, 0(TMP1) - | bnez AT, <3 - |. daddiu TMP1, TMP1, 8 - | bnez TMP0, >7 - |. nop - |4: - | ins_next - | - |5: // Need to resize array part. - | load_got lj_tab_reasize - | sd BASE, L->base - | sd PC, SAVE_PC - | move BASE, RD - | call_intern lj_tab_reasize // (lua_State *L, GCtab *t, int nasize) - |. move CARG1, L - | // Must not reallocate the stack. - | move RD, BASE - | b <1 - |. ld BASE, L->base // Reload BASE for lack of a saved register. - | - |7: // Possible table write barrier for any value. Skip valiswhite check. - | barrierback TAB:CARG2, TMP3, TMP0, <4 - break; - - /* -- Calls and vararg handling ----------------------------------------- */ - - case BC_CALLM: - | // RA = base*8, (RB = (nresults+1)*8,) RC = extra_nargs*8 - | decode_RDtoRC8 NARGS8:RC, RD - | b ->BC_CALL_Z - |. addu NARGS8:RC, NARGS8:RC, MULTRES - break; - case BC_CALL: - | // RA = base*8, (RB = (nresults+1)*8,) RC = (nargs+1)*8 - | decode_RDtoRC8 NARGS8:RC, RD - |->BC_CALL_Z: - | move TMP2, BASE - | daddu BASE, BASE, RA - | ld LFUNC:RB, 0(BASE) - | daddiu BASE, BASE, 16 - | addiu NARGS8:RC, NARGS8:RC, -8 - | checkfunc RB, ->vmeta_call - | ins_call - break; - - case BC_CALLMT: - | // RA = base*8, (RB = 0,) RC = extra_nargs*8 - | addu NARGS8:RD, NARGS8:RD, MULTRES // BC_CALLT gets RC from RD. - | // Fall through. Assumes BC_CALLT follows. - break; - case BC_CALLT: - | // RA = base*8, (RB = 0,) RC = (nargs+1)*8 - | daddu RA, BASE, RA - | ld RB, 0(RA) - | move NARGS8:RC, RD - | ld TMP1, FRAME_PC(BASE) - | daddiu RA, RA, 16 - | addiu NARGS8:RC, NARGS8:RC, -8 - | checktp CARG3, RB, -LJ_TFUNC, ->vmeta_callt - |->BC_CALLT_Z: - | andi TMP0, TMP1, FRAME_TYPE // Caveat: preserve TMP0 until the 'or'. - | lbu TMP3, LFUNC:CARG3->ffid - | bnez TMP0, >7 - |. xori TMP2, TMP1, FRAME_VARG - |1: - | sd RB, FRAME_FUNC(BASE) // Copy function down, but keep PC. - | sltiu AT, TMP3, 2 // (> FF_C) Calling a fast function? - | move TMP2, BASE - | move RB, CARG3 - | beqz NARGS8:RC, >3 - |. move TMP3, NARGS8:RC - |2: - | ld CRET1, 0(RA) - | daddiu RA, RA, 8 - | addiu TMP3, TMP3, -8 - | sd CRET1, 0(TMP2) - | bnez TMP3, <2 - |. daddiu TMP2, TMP2, 8 - |3: - | or TMP0, TMP0, AT - | beqz TMP0, >5 - |. nop - |4: - | ins_callt - | - |5: // Tailcall to a fast function with a Lua frame below. - | lw INS, -4(TMP1) - | decode_RA8a RA, INS - | decode_RA8b RA - | dsubu TMP1, BASE, RA - | ld TMP1, -32(TMP1) - | cleartp LFUNC:TMP1 - | ld TMP1, LFUNC:TMP1->pc - | b <4 - |. ld KBASE, PC2PROTO(k)(TMP1) // Need to prepare KBASE. - | - |7: // Tailcall from a vararg function. - | andi AT, TMP2, FRAME_TYPEP - | bnez AT, <1 // Vararg frame below? - |. dsubu TMP2, BASE, TMP2 // Relocate BASE down. - | move BASE, TMP2 - | ld TMP1, FRAME_PC(TMP2) - | b <1 - |. andi TMP0, TMP1, FRAME_TYPE - break; - - case BC_ITERC: - | // RA = base*8, (RB = (nresults+1)*8, RC = (nargs+1)*8 ((2+1)*8)) - | move TMP2, BASE // Save old BASE fir vmeta_call. - | daddu BASE, BASE, RA - | ld RB, -24(BASE) - | ld CARG1, -16(BASE) - | ld CARG2, -8(BASE) - | li NARGS8:RC, 16 // Iterators get 2 arguments. - | sd RB, 0(BASE) // Copy callable. - | sd CARG1, 16(BASE) // Copy state. - | sd CARG2, 24(BASE) // Copy control var. - | daddiu BASE, BASE, 16 - | checkfunc RB, ->vmeta_call - | ins_call - break; - - case BC_ITERN: - | // RA = base*8, (RB = (nresults+1)*8, RC = (nargs+1)*8 (2+1)*8) - |.if JIT - | // NYI: add hotloop, record BC_ITERN. - |.endif - | daddu RA, BASE, RA - | ld TAB:RB, -16(RA) - | lw RC, -8+LO(RA) // Get index from control var. - | cleartp TAB:RB - | daddiu PC, PC, 4 - | lw TMP0, TAB:RB->asize - | ld TMP1, TAB:RB->array - | dsll CARG3, TISNUM, 47 - |1: // Traverse array part. - | sltu AT, RC, TMP0 - | beqz AT, >5 // Index points after array part? - |. sll TMP3, RC, 3 - | daddu TMP3, TMP1, TMP3 - | ld CARG1, 0(TMP3) - | lhu RD, -4+OFS_RD(PC) - | or TMP2, RC, CARG3 - | beq CARG1, TISNIL, <1 // Skip holes in array part. - |. addiu RC, RC, 1 - | sd TMP2, 0(RA) - | sd CARG1, 8(RA) - | or TMP0, RC, CARG3 - | lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535) - | decode_RD4b RD - | daddu RD, RD, TMP3 - | sw TMP0, -8+LO(RA) // Update control var. - | daddu PC, PC, RD - |3: - | ins_next - | - |5: // Traverse hash part. - | lw TMP1, TAB:RB->hmask - | subu RC, RC, TMP0 - | ld TMP2, TAB:RB->node - |6: - | sltu AT, TMP1, RC // End of iteration? Branch to ITERL+1. - | bnez AT, <3 - |. sll TMP3, RC, 5 - | sll RB, RC, 3 - | subu TMP3, TMP3, RB - | daddu NODE:TMP3, TMP3, TMP2 - | ld CARG1, 0(NODE:TMP3) - | lhu RD, -4+OFS_RD(PC) - | beq CARG1, TISNIL, <6 // Skip holes in hash part. - |. addiu RC, RC, 1 - | ld CARG2, NODE:TMP3->key - | lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535) - | sd CARG1, 8(RA) - | addu RC, RC, TMP0 - | decode_RD4b RD - | addu RD, RD, TMP3 - | sd CARG2, 0(RA) - | daddu PC, PC, RD - | b <3 - |. sw RC, -8+LO(RA) // Update control var. - break; - - case BC_ISNEXT: - | // RA = base*8, RD = target (points to ITERN) - | daddu RA, BASE, RA - | srl TMP0, RD, 1 - | ld CFUNC:CARG1, -24(RA) - | daddu TMP0, PC, TMP0 - | ld CARG2, -16(RA) - | ld CARG3, -8(RA) - | lui TMP2, (-(BCBIAS_J*4 >> 16) & 65535) - | checkfunc CFUNC:CARG1, >5 - | gettp CARG2, CARG2 - | daddiu CARG2, CARG2, -LJ_TTAB - | lbu TMP1, CFUNC:CARG1->ffid - | daddiu CARG3, CARG3, -LJ_TNIL - | or AT, CARG2, CARG3 - | daddiu TMP1, TMP1, -FF_next_N - | or AT, AT, TMP1 - | bnez AT, >5 - |. lui TMP1, 0xfffe - | daddu PC, TMP0, TMP2 - | ori TMP1, TMP1, 0x7fff - | dsll TMP1, TMP1, 32 - | sd TMP1, -8(RA) - |1: - | ins_next - |5: // Despecialize bytecode if any of the checks fail. - | li TMP3, BC_JMP - | li TMP1, BC_ITERC - | sb TMP3, -4+OFS_OP(PC) - | daddu PC, TMP0, TMP2 - | b <1 - |. sb TMP1, OFS_OP(PC) - break; - - case BC_VARG: - | // RA = base*8, RB = (nresults+1)*8, RC = numparams*8 - | ld TMP0, FRAME_PC(BASE) - | decode_RDtoRC8 RC, RD - | decode_RB8a RB, INS - | daddu RC, BASE, RC - | decode_RB8b RB - | daddu RA, BASE, RA - | daddiu RC, RC, FRAME_VARG - | daddu TMP2, RA, RB - | daddiu TMP3, BASE, -16 // TMP3 = vtop - | dsubu RC, RC, TMP0 // RC = vbase - | // Note: RC may now be even _above_ BASE if nargs was < numparams. - | beqz RB, >5 // Copy all varargs? - |. dsubu TMP1, TMP3, RC - | daddiu TMP2, TMP2, -16 - |1: // Copy vararg slots to destination slots. - | ld CARG1, 0(RC) - | sltu AT, RC, TMP3 - | daddiu RC, RC, 8 - | movz CARG1, TISNIL, AT - | sd CARG1, 0(RA) - | sltu AT, RA, TMP2 - | bnez AT, <1 - |. daddiu RA, RA, 8 - |3: - | ins_next - | - |5: // Copy all varargs. - | ld TMP0, L->maxstack - | blez TMP1, <3 // No vararg slots? - |. li MULTRES, 8 // MULTRES = (0+1)*8 - | daddu TMP2, RA, TMP1 - | sltu AT, TMP0, TMP2 - | bnez AT, >7 - |. daddiu MULTRES, TMP1, 8 - |6: - | ld CRET1, 0(RC) - | daddiu RC, RC, 8 - | sd CRET1, 0(RA) - | sltu AT, RC, TMP3 - | bnez AT, <6 // More vararg slots? - |. daddiu RA, RA, 8 - | b <3 - |. nop - | - |7: // Grow stack for varargs. - | load_got lj_state_growstack - | sd RA, L->top - | dsubu RA, RA, BASE - | sd BASE, L->base - | dsubu BASE, RC, BASE // Need delta, because BASE may change. - | sd PC, SAVE_PC - | srl CARG2, TMP1, 3 - | call_intern lj_state_growstack // (lua_State *L, int n) - |. move CARG1, L - | move RC, BASE - | ld BASE, L->base - | daddu RA, BASE, RA - | daddu RC, BASE, RC - | b <6 - |. daddiu TMP3, BASE, -16 - break; - - /* -- Returns ----------------------------------------------------------- */ - - case BC_RETM: - | // RA = results*8, RD = extra_nresults*8 - | addu RD, RD, MULTRES // MULTRES >= 8, so RD >= 8. - | // Fall through. Assumes BC_RET follows. - break; - - case BC_RET: - | // RA = results*8, RD = (nresults+1)*8 - | ld PC, FRAME_PC(BASE) - | daddu RA, BASE, RA - | move MULTRES, RD - |1: - | andi TMP0, PC, FRAME_TYPE - | bnez TMP0, ->BC_RETV_Z - |. xori TMP1, PC, FRAME_VARG - | - |->BC_RET_Z: - | // BASE = base, RA = resultptr, RD = (nresults+1)*8, PC = return - | lw INS, -4(PC) - | daddiu TMP2, BASE, -16 - | daddiu RC, RD, -8 - | decode_RA8a TMP0, INS - | decode_RB8a RB, INS - | decode_RA8b TMP0 - | decode_RB8b RB - | daddu TMP3, TMP2, RB - | beqz RC, >3 - |. dsubu BASE, TMP2, TMP0 - |2: - | ld CRET1, 0(RA) - | daddiu RA, RA, 8 - | daddiu RC, RC, -8 - | sd CRET1, 0(TMP2) - | bnez RC, <2 - |. daddiu TMP2, TMP2, 8 - |3: - | daddiu TMP3, TMP3, -8 - |5: - | sltu AT, TMP2, TMP3 - | bnez AT, >6 - |. ld LFUNC:TMP1, FRAME_FUNC(BASE) - | ins_next1 - | cleartp LFUNC:TMP1 - | ld TMP1, LFUNC:TMP1->pc - | ld KBASE, PC2PROTO(k)(TMP1) - | ins_next2 - | - |6: // Fill up results with nil. - | sd TISNIL, 0(TMP2) - | b <5 - |. daddiu TMP2, TMP2, 8 - | - |->BC_RETV_Z: // Non-standard return case. - | andi TMP2, TMP1, FRAME_TYPEP - | bnez TMP2, ->vm_return - |. nop - | // Return from vararg function: relocate BASE down. - | dsubu BASE, BASE, TMP1 - | b <1 - |. ld PC, FRAME_PC(BASE) - break; - - case BC_RET0: case BC_RET1: - | // RA = results*8, RD = (nresults+1)*8 - | ld PC, FRAME_PC(BASE) - | daddu RA, BASE, RA - | move MULTRES, RD - | andi TMP0, PC, FRAME_TYPE - | bnez TMP0, ->BC_RETV_Z - |. xori TMP1, PC, FRAME_VARG - | lw INS, -4(PC) - | daddiu TMP2, BASE, -16 - if (op == BC_RET1) { - | ld CRET1, 0(RA) - } - | decode_RB8a RB, INS - | decode_RA8a RA, INS - | decode_RB8b RB - | decode_RA8b RA - | dsubu BASE, TMP2, RA - if (op == BC_RET1) { - | sd CRET1, 0(TMP2) - } - |5: - | sltu AT, RD, RB - | bnez AT, >6 - |. ld TMP1, FRAME_FUNC(BASE) - | ins_next1 - | cleartp LFUNC:TMP1 - | ld TMP1, LFUNC:TMP1->pc - | ld KBASE, PC2PROTO(k)(TMP1) - | ins_next2 - | - |6: // Fill up results with nil. - | daddiu TMP2, TMP2, 8 - | daddiu RD, RD, 8 - | b <5 - if (op == BC_RET1) { - |. sd TISNIL, 0(TMP2) - } else { - |. sd TISNIL, -8(TMP2) - } - break; - - /* -- Loops and branches ------------------------------------------------ */ - - case BC_FORL: - |.if JIT - | hotloop - |.endif - | // Fall through. Assumes BC_IFORL follows. - break; - - case BC_JFORI: - case BC_JFORL: -#if !LJ_HASJIT - break; -#endif - case BC_FORI: - case BC_IFORL: - | // RA = base*8, RD = target (after end of loop or start of loop) - vk = (op == BC_IFORL || op == BC_JFORL); - | daddu RA, BASE, RA - | ld CARG1, FORL_IDX*8(RA) // IDX CARG1 - CARG3 type - | gettp CARG3, CARG1 - if (op != BC_JFORL) { - | srl RD, RD, 1 - | lui TMP2, (-(BCBIAS_J*4 >> 16) & 65535) - | daddu TMP2, RD, TMP2 - } - if (!vk) { - | ld CARG2, FORL_STOP*8(RA) // STOP CARG2 - CARG4 type - | ld CRET1, FORL_STEP*8(RA) // STEP CRET1 - CRET2 type - | gettp CARG4, CARG2 - | bne CARG3, TISNUM, >5 - |. gettp CRET2, CRET1 - | bne CARG4, TISNUM, ->vmeta_for - |. sextw CARG3, CARG1 - | bne CRET2, TISNUM, ->vmeta_for - |. sextw CARG2, CARG2 - | dext AT, CRET1, 31, 0 - | slt CRET1, CARG2, CARG3 - | slt TMP1, CARG3, CARG2 - | movn CRET1, TMP1, AT - } else { - | bne CARG3, TISNUM, >5 - |. ld CARG2, FORL_STEP*8(RA) // STEP CARG2 - CARG4 type - | ld CRET1, FORL_STOP*8(RA) // STOP CRET1 - CRET2 type - | sextw TMP3, CARG1 - | sextw CARG2, CARG2 - | sextw CRET1, CRET1 - | addu CARG1, TMP3, CARG2 - | xor TMP0, CARG1, TMP3 - | xor TMP1, CARG1, CARG2 - | and TMP0, TMP0, TMP1 - | slt TMP1, CARG1, CRET1 - | slt CRET1, CRET1, CARG1 - | slt AT, CARG2, r0 - | slt TMP0, TMP0, r0 // ((y^a) & (y^b)) < 0: overflow. - | movn CRET1, TMP1, AT - | or CRET1, CRET1, TMP0 - | zextw CARG1, CARG1 - | settp CARG1, TISNUM - } - |1: - if (op == BC_FORI) { - | movz TMP2, r0, CRET1 - | daddu PC, PC, TMP2 - } else if (op == BC_JFORI) { - | daddu PC, PC, TMP2 - | lhu RD, -4+OFS_RD(PC) - } else if (op == BC_IFORL) { - | movn TMP2, r0, CRET1 - | daddu PC, PC, TMP2 - } - if (vk) { - | sd CARG1, FORL_IDX*8(RA) - } - | ins_next1 - | sd CARG1, FORL_EXT*8(RA) - |2: - if (op == BC_JFORI) { - | beqz CRET1, =>BC_JLOOP - |. decode_RD8b RD - } else if (op == BC_JFORL) { - | beqz CRET1, =>BC_JLOOP - } - | ins_next2 - | - |5: // FP loop. - |.if FPU - if (!vk) { - | ldc1 f0, FORL_IDX*8(RA) - | ldc1 f2, FORL_STOP*8(RA) - | sltiu TMP0, CARG3, LJ_TISNUM - | sltiu TMP1, CARG4, LJ_TISNUM - | sltiu AT, CRET2, LJ_TISNUM - | ld TMP3, FORL_STEP*8(RA) - | and TMP0, TMP0, TMP1 - | and AT, AT, TMP0 - | beqz AT, ->vmeta_for - |. slt TMP3, TMP3, r0 - | c.ole.d 0, f0, f2 - | c.ole.d 1, f2, f0 - | li CRET1, 1 - | movt CRET1, r0, 0 - | movt AT, r0, 1 - | b <1 - |. movn CRET1, AT, TMP3 - } else { - | ldc1 f0, FORL_IDX*8(RA) - | ldc1 f4, FORL_STEP*8(RA) - | ldc1 f2, FORL_STOP*8(RA) - | ld TMP3, FORL_STEP*8(RA) - | add.d f0, f0, f4 - | c.ole.d 0, f0, f2 - | c.ole.d 1, f2, f0 - | slt TMP3, TMP3, r0 - | li CRET1, 1 - | li AT, 1 - | movt CRET1, r0, 0 - | movt AT, r0, 1 - | movn CRET1, AT, TMP3 - if (op == BC_IFORL) { - | movn TMP2, r0, CRET1 - | daddu PC, PC, TMP2 - } - | sdc1 f0, FORL_IDX*8(RA) - | ins_next1 - | b <2 - |. sdc1 f0, FORL_EXT*8(RA) - } - |.else - if (!vk) { - | sltiu TMP0, CARG3, LJ_TISNUM - | sltiu TMP1, CARG4, LJ_TISNUM - | sltiu AT, CRET2, LJ_TISNUM - | and TMP0, TMP0, TMP1 - | and AT, AT, TMP0 - | beqz AT, ->vmeta_for - |. nop - | bal ->vm_sfcmpolex - |. lw TMP3, FORL_STEP*8+HI(RA) - | b <1 - |. nop - } else { - | load_got __adddf3 - | call_extern - |. sw TMP2, TMPD - | ld CARG2, FORL_STOP*8(RA) - | move CARG1, CRET1 - if ( op == BC_JFORL ) { - | lhu RD, -4+OFS_RD(PC) - | decode_RD8b RD - } - | bal ->vm_sfcmpolex - |. lw TMP3, FORL_STEP*8+HI(RA) - | b <1 - |. lw TMP2, TMPD - } - |.endif - break; - - case BC_ITERL: - |.if JIT - | hotloop - |.endif - | // Fall through. Assumes BC_IITERL follows. - break; - - case BC_JITERL: -#if !LJ_HASJIT - break; -#endif - case BC_IITERL: - | // RA = base*8, RD = target - | daddu RA, BASE, RA - | ld TMP1, 0(RA) - | beq TMP1, TISNIL, >1 // Stop if iterator returned nil. - |. nop - if (op == BC_JITERL) { - | b =>BC_JLOOP - |. sd TMP1, -8(RA) - } else { - | branch_RD // Otherwise save control var + branch. - | sd TMP1, -8(RA) - } - |1: - | ins_next - break; - - case BC_LOOP: - | // RA = base*8, 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 - |.endif - | // Fall through. Assumes BC_ILOOP follows. - break; - - case BC_ILOOP: - | // RA = base*8, RD = target (loop extent) - | ins_next - break; - - case BC_JLOOP: - |.if JIT - | // RA = base*8 (ignored), RD = traceno*8 - | ld TMP1, DISPATCH_J(trace)(DISPATCH) - | li AT, 0 - | daddu TMP1, TMP1, RD - | // Traces on MIPS don't store the trace number, so use 0. - | sd AT, DISPATCH_GL(vmstate)(DISPATCH) - | ld TRACE:TMP2, 0(TMP1) - | sd BASE, DISPATCH_GL(jit_base)(DISPATCH) - | ld TMP2, TRACE:TMP2->mcode - | sd L, DISPATCH_GL(tmpbuf.L)(DISPATCH) - | jr TMP2 - |. daddiu JGL, DISPATCH, GG_DISP2G+32768 - |.endif - break; - - case BC_JMP: - | // RA = base*8 (only used by trace recorder), RD = target - | branch_RD - | ins_next - break; - - /* -- Function headers -------------------------------------------------- */ - - case BC_FUNCF: - |.if JIT - | hotcall - |.endif - case BC_FUNCV: /* NYI: compiled vararg functions. */ - | // Fall through. Assumes BC_IFUNCF/BC_IFUNCV follow. - break; - - case BC_JFUNCF: -#if !LJ_HASJIT - break; -#endif - case BC_IFUNCF: - | // BASE = new base, RA = BASE+framesize*8, RB = LFUNC, RC = nargs*8 - | ld TMP2, L->maxstack - | lbu TMP1, -4+PC2PROTO(numparams)(PC) - | ld KBASE, -4+PC2PROTO(k)(PC) - | sltu AT, TMP2, RA - | bnez AT, ->vm_growstack_l - |. sll TMP1, TMP1, 3 - if (op != BC_JFUNCF) { - | ins_next1 - } - |2: - | sltu AT, NARGS8:RC, TMP1 // Check for missing parameters. - | bnez AT, >3 - |. daddu AT, BASE, NARGS8:RC - if (op == BC_JFUNCF) { - | decode_RD8a RD, INS - | b =>BC_JLOOP - |. decode_RD8b RD - } else { - | ins_next2 - } - | - |3: // Clear missing parameters. - | sd TISNIL, 0(AT) - | b <2 - |. addiu NARGS8:RC, NARGS8:RC, 8 - break; - - case BC_JFUNCV: -#if !LJ_HASJIT - break; -#endif - | NYI // NYI: compiled vararg functions - break; /* NYI: compiled vararg functions. */ - - case BC_IFUNCV: - | // BASE = new base, RA = BASE+framesize*8, RB = LFUNC, RC = nargs*8 - | li TMP0, LJ_TFUNC - | daddu TMP1, BASE, RC - | ld TMP2, L->maxstack - | settp LFUNC:RB, TMP0 - | daddu TMP0, RA, RC - | sd LFUNC:RB, 0(TMP1) // Store (tagged) copy of LFUNC. - | daddiu TMP3, RC, 16+FRAME_VARG - | sltu AT, TMP0, TMP2 - | ld KBASE, -4+PC2PROTO(k)(PC) - | beqz AT, ->vm_growstack_l - |. sd TMP3, 8(TMP1) // Store delta + FRAME_VARG. - | lbu TMP2, -4+PC2PROTO(numparams)(PC) - | move RA, BASE - | move RC, TMP1 - | ins_next1 - | beqz TMP2, >3 - |. daddiu BASE, TMP1, 16 - |1: - | ld TMP0, 0(RA) - | sltu AT, RA, RC // Less args than parameters? - | move CARG1, TMP0 - | movz TMP0, TISNIL, AT // Clear missing parameters. - | movn CARG1, TISNIL, AT // Clear old fixarg slot (help the GC). - | addiu TMP2, TMP2, -1 - | sd TMP0, 16(TMP1) - | daddiu TMP1, TMP1, 8 - | sd CARG1, 0(RA) - | bnez TMP2, <1 - |. daddiu RA, RA, 8 - |3: - | ins_next2 - break; - - case BC_FUNCC: - case BC_FUNCCW: - | // BASE = new base, RA = BASE+framesize*8, RB = CFUNC, RC = nargs*8 - if (op == BC_FUNCC) { - | ld CFUNCADDR, CFUNC:RB->f - } else { - | ld CFUNCADDR, DISPATCH_GL(wrapf)(DISPATCH) - } - | daddu TMP1, RA, NARGS8:RC - | ld TMP2, L->maxstack - | daddu RC, BASE, NARGS8:RC - | sd BASE, L->base - | sltu AT, TMP2, TMP1 - | sd RC, L->top - | li_vmstate C - if (op == BC_FUNCCW) { - | ld CARG2, CFUNC:RB->f - } - | bnez AT, ->vm_growstack_c // Need to grow stack. - |. move CARG1, L - | jalr CFUNCADDR // (lua_State *L [, lua_CFunction f]) - |. st_vmstate - | // Returns nresults. - | ld BASE, L->base - | sll RD, CRET1, 3 - | ld TMP1, L->top - | li_vmstate INTERP - | ld PC, FRAME_PC(BASE) // Fetch PC of caller. - | dsubu RA, TMP1, RD // RA = L->top - nresults*8 - | sd L, DISPATCH_GL(cur_L)(DISPATCH) - | b ->vm_returnc - |. st_vmstate - 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); - int i; - switch (ctx->mode) { - case BUILD_elfasm: - fprintf(ctx->fp, "\t.section .debug_frame,\"\",@progbits\n"); - fprintf(ctx->fp, - ".Lframe0:\n" - "\t.4byte .LECIE0-.LSCIE0\n" - ".LSCIE0:\n" - "\t.4byte 0xffffffff\n" - "\t.byte 0x1\n" - "\t.string \"\"\n" - "\t.uleb128 0x1\n" - "\t.sleb128 -4\n" - "\t.byte 31\n" - "\t.byte 0xc\n\t.uleb128 29\n\t.uleb128 0\n" - "\t.align 2\n" - ".LECIE0:\n\n"); - fprintf(ctx->fp, - ".LSFDE0:\n" - "\t.4byte .LEFDE0-.LASFDE0\n" - ".LASFDE0:\n" - "\t.4byte .Lframe0\n" - "\t.8byte .Lbegin\n" - "\t.8byte %d\n" - "\t.byte 0xe\n\t.uleb128 %d\n" - "\t.byte 0x9f\n\t.sleb128 2*5\n" - "\t.byte 0x9e\n\t.sleb128 2*6\n", - fcofs, CFRAME_SIZE); - for (i = 23; i >= 16; i--) - fprintf(ctx->fp, "\t.byte %d\n\t.uleb128 %d\n", 0x80+i, 2*(30-i)); -#if !LJ_SOFTFP - for (i = 31; i >= 24; i--) - fprintf(ctx->fp, "\t.byte %d\n\t.uleb128 %d\n", 0x80+32+i, 2*(46-i)); -#endif - fprintf(ctx->fp, - "\t.align 2\n" - ".LEFDE0:\n\n"); -#if LJ_HASFFI - fprintf(ctx->fp, - ".LSFDE1:\n" - "\t.4byte .LEFDE1-.LASFDE1\n" - ".LASFDE1:\n" - "\t.4byte .Lframe0\n" - "\t.4byte lj_vm_ffi_call\n" - "\t.4byte %d\n" - "\t.byte 0x9f\n\t.uleb128 2*1\n" - "\t.byte 0x90\n\t.uleb128 2*2\n" - "\t.byte 0xd\n\t.uleb128 0x10\n" - "\t.align 2\n" - ".LEFDE1:\n\n", (int)ctx->codesz - fcofs); -#endif -#if !LJ_NO_UNWIND - /* NYI */ -#endif - break; - default: - break; - } -} - |