|// 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:RC, NARGS8:RC, -16 | ld CARG1, 0(BASE) | ld CARG2, 8(BASE) | bltz NARGS8:RC, ->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 | 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 |.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 |. nop |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 | |//----------------------------------------------------------------------- |//-- 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<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<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<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<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<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<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<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<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<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<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, TMP0, <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; } }