|// Low-level VM code for MIPS64 CPUs.
|// Bytecode interpreter, fast functions and helper functions.
|// Copyright (C) 2005-2017 Mike Pall. See Copyright Notice in luajit.h
|//
|// Contributed by Djordje Kovacevic and Stefan Pejic from RT-RK.com.
|// Sponsored by Cisco Systems, Inc.
|
|.arch mips64
|.section code_op, code_sub
|
|.actionlist build_actionlist
|.globals GLOB_
|.globalnames globnames
|.externnames extnames
|
|// Note: The ragged indentation of the instructions is intentional.
|// The starting columns indicate data dependencies.
|
|//-----------------------------------------------------------------------
|
|// Fixed register assignments for the interpreter.
|// Don't use: r0 = 0, r26/r27 = reserved, r28 = gp, r29 = sp, r31 = ra
|
|.macro .FPU, a, b
|.if FPU
| a, b
|.endif
|.endmacro
|
|// The following must be C callee-save (but BASE is often refetched).
|.define BASE, r16 // Base of current Lua stack frame.
|.define KBASE, r17 // Constants of current Lua function.
|.define PC, r18 // Next PC.
|.define DISPATCH, r19 // Opcode dispatch table.
|.define LREG, r20 // Register holding lua_State (also in SAVE_L).
|.define MULTRES, r21 // Size of multi-result: (nresults+1)*8.
|
|.define JGL, r30 // On-trace: global_State + 32768.
|
|// Constants for type-comparisons, stores and conversions. C callee-save.
|.define TISNIL, r30
|.define TISNUM, r22
|.if FPU
|.define TOBIT, f30 // 2^52 + 2^51.
|.endif
|
|// The following temporaries are not saved across C calls, except for RA.
|.define RA, r23 // Callee-save.
|.define RB, r8
|.define RC, r9
|.define RD, r10
|.define INS, r11
|
|.define AT, r1 // Assembler temporary.
|.define TMP0, r12
|.define TMP1, r13
|.define TMP2, r14
|.define TMP3, r15
|
|// MIPS n64 calling convention.
|.define CFUNCADDR, r25
|.define CARG1, r4
|.define CARG2, r5
|.define CARG3, r6
|.define CARG4, r7
|.define CARG5, r8
|.define CARG6, r9
|.define CARG7, r10
|.define CARG8, r11
|
|.define CRET1, r2
|.define CRET2, r3
|
|.if FPU
|.define FARG1, f12
|.define FARG2, f13
|.define FARG3, f14
|.define FARG4, f15
|.define FARG5, f16
|.define FARG6, f17
|.define FARG7, f18
|.define FARG8, f19
|
|.define FRET1, f0
|.define FRET2, f2
|.endif
|
|// Stack layout while in interpreter. Must match with lj_frame.h.
|.if FPU // MIPS64 hard-float.
|
|.define CFRAME_SPACE, 192 // Delta for sp.
|
|//----- 16 byte aligned, <-- sp entering interpreter
|.define SAVE_ERRF, 188(sp) // 32 bit values.
|.define SAVE_NRES, 184(sp)
|.define SAVE_CFRAME, 176(sp) // 64 bit values.
|.define SAVE_L, 168(sp)
|.define SAVE_PC, 160(sp)
|//----- 16 byte aligned
|.define SAVE_GPR_, 80 // .. 80+10*8: 64 bit GPR saves.
|.define SAVE_FPR_, 16 // .. 16+8*8: 64 bit FPR saves.
|
|.else // MIPS64 soft-float
|
|.define CFRAME_SPACE, 128 // Delta for sp.
|
|//----- 16 byte aligned, <-- sp entering interpreter
|.define SAVE_ERRF, 124(sp) // 32 bit values.
|.define SAVE_NRES, 120(sp)
|.define SAVE_CFRAME, 112(sp) // 64 bit values.
|.define SAVE_L, 104(sp)
|.define SAVE_PC, 96(sp)
|//----- 16 byte aligned
|.define SAVE_GPR_, 16 // .. 16+10*8: 64 bit GPR saves.
|
|.endif
|
|.define TMPX, 8(sp) // Unused by interpreter, temp for JIT code.
|.define TMPD, 0(sp)
|//----- 16 byte aligned
|
|.define TMPD_OFS, 0
|
|.define SAVE_MULTRES, TMPD
|
|//-----------------------------------------------------------------------
|
|.macro saveregs
| daddiu sp, sp, -CFRAME_SPACE
| sd ra, SAVE_GPR_+9*8(sp)
| sd r30, SAVE_GPR_+8*8(sp)
| .FPU sdc1 f31, SAVE_FPR_+7*8(sp)
| sd r23, SAVE_GPR_+7*8(sp)
| .FPU sdc1 f30, SAVE_FPR_+6*8(sp)
| sd r22, SAVE_GPR_+6*8(sp)
| .FPU sdc1 f29, SAVE_FPR_+5*8(sp)
| sd r21, SAVE_GPR_+5*8(sp)
| .FPU sdc1 f28, SAVE_FPR_+4*8(sp)
| sd r20, SAVE_GPR_+4*8(sp)
| .FPU sdc1 f27, SAVE_FPR_+3*8(sp)
| sd r19, SAVE_GPR_+3*8(sp)
| .FPU sdc1 f26, SAVE_FPR_+2*8(sp)
| sd r18, SAVE_GPR_+2*8(sp)
| .FPU sdc1 f25, SAVE_FPR_+1*8(sp)
| sd r17, SAVE_GPR_+1*8(sp)
| .FPU sdc1 f24, SAVE_FPR_+0*8(sp)
| sd r16, SAVE_GPR_+0*8(sp)
|.endmacro
|
|.macro restoreregs_ret
| ld ra, SAVE_GPR_+9*8(sp)
| ld r30, SAVE_GPR_+8*8(sp)
| ld r23, SAVE_GPR_+7*8(sp)
| .FPU ldc1 f31, SAVE_FPR_+7*8(sp)
| ld r22, SAVE_GPR_+6*8(sp)
| .FPU ldc1 f30, SAVE_FPR_+6*8(sp)
| ld r21, SAVE_GPR_+5*8(sp)
| .FPU ldc1 f29, SAVE_FPR_+5*8(sp)
| ld r20, SAVE_GPR_+4*8(sp)
| .FPU ldc1 f28, SAVE_FPR_+4*8(sp)
| ld r19, SAVE_GPR_+3*8(sp)
| .FPU ldc1 f27, SAVE_FPR_+3*8(sp)
| ld r18, SAVE_GPR_+2*8(sp)
| .FPU ldc1 f26, SAVE_FPR_+2*8(sp)
| ld r17, SAVE_GPR_+1*8(sp)
| .FPU ldc1 f25, SAVE_FPR_+1*8(sp)
| ld r16, SAVE_GPR_+0*8(sp)
| .FPU ldc1 f24, SAVE_FPR_+0*8(sp)
| jr ra
| daddiu sp, sp, CFRAME_SPACE
|.endmacro
|
|// Type definitions. Some of these are only used for documentation.
|.type L, lua_State, LREG
|.type GL, global_State
|.type TVALUE, TValue
|.type GCOBJ, GCobj
|.type STR, GCstr
|.type TAB, GCtab
|.type LFUNC, GCfuncL
|.type CFUNC, GCfuncC
|.type PROTO, GCproto
|.type UPVAL, GCupval
|.type NODE, Node
|.type NARGS8, int
|.type TRACE, GCtrace
|.type SBUF, SBuf
|
|//-----------------------------------------------------------------------
|
|// Trap for not-yet-implemented parts.
|.macro NYI; .long 0xf0f0f0f0; .endmacro
|
|// Macros to mark delay slots.
|.macro ., a; a; .endmacro
|.macro ., a,b; a,b; .endmacro
|.macro ., a,b,c; a,b,c; .endmacro
|.macro ., a,b,c,d; a,b,c,d; .endmacro
|
|.define FRAME_PC, -8
|.define FRAME_FUNC, -16
|
|//-----------------------------------------------------------------------
|
|// Endian-specific defines.
|.if ENDIAN_LE
|.define HI, 4
|.define LO, 0
|.define OFS_RD, 2
|.define OFS_RA, 1
|.define OFS_OP, 0
|.else
|.define HI, 0
|.define LO, 4
|.define OFS_RD, 0
|.define OFS_RA, 2
|.define OFS_OP, 3
|.endif
|
|// Instruction decode.
|.macro decode_OP1, dst, ins; andi dst, ins, 0xff; .endmacro
|.macro decode_OP8a, dst, ins; andi dst, ins, 0xff; .endmacro
|.macro decode_OP8b, dst; sll dst, dst, 3; .endmacro
|.macro decode_RC8a, dst, ins; srl dst, ins, 13; .endmacro
|.macro decode_RC8b, dst; andi dst, dst, 0x7f8; .endmacro
|.macro decode_RD4b, dst; sll dst, dst, 2; .endmacro
|.macro decode_RA8a, dst, ins; srl dst, ins, 5; .endmacro
|.macro decode_RA8b, dst; andi dst, dst, 0x7f8; .endmacro
|.macro decode_RB8a, dst, ins; srl dst, ins, 21; .endmacro
|.macro decode_RB8b, dst; andi dst, dst, 0x7f8; .endmacro
|.macro decode_RD8a, dst, ins; srl dst, ins, 16; .endmacro
|.macro decode_RD8b, dst; sll dst, dst, 3; .endmacro
|.macro decode_RDtoRC8, dst, src; andi dst, src, 0x7f8; .endmacro
|
|// Instruction fetch.
|.macro ins_NEXT1
| lw INS, 0(PC)
| daddiu PC, PC, 4
|.endmacro
|// Instruction decode+dispatch.
|.macro ins_NEXT2
| decode_OP8a TMP1, INS
| decode_OP8b TMP1
| daddu TMP0, DISPATCH, TMP1
| decode_RD8a RD, INS
| ld AT, 0(TMP0)
| decode_RA8a RA, INS
| decode_RD8b RD
| jr AT
| decode_RA8b RA
|.endmacro
|.macro ins_NEXT
| ins_NEXT1
| ins_NEXT2
|.endmacro
|
|// Instruction footer.
|.if 1
| // Replicated dispatch. Less unpredictable branches, but higher I-Cache use.
| .define ins_next, ins_NEXT
| .define ins_next_, ins_NEXT
| .define ins_next1, ins_NEXT1
| .define ins_next2, ins_NEXT2
|.else
| // Common dispatch. Lower I-Cache use, only one (very) unpredictable branch.
| // Affects only certain kinds of benchmarks (and only with -j off).
| .macro ins_next
| b ->ins_next
| .endmacro
| .macro ins_next1
| .endmacro
| .macro ins_next2
| b ->ins_next
| .endmacro
| .macro ins_next_
| ->ins_next:
| ins_NEXT
| .endmacro
|.endif
|
|// Call decode and dispatch.
|.macro ins_callt
| // BASE = new base, RB = LFUNC/CFUNC, RC = nargs*8, FRAME_PC(BASE) = PC
| ld PC, LFUNC:RB->pc
| lw INS, 0(PC)
| daddiu PC, PC, 4
| decode_OP8a TMP1, INS
| decode_RA8a RA, INS
| decode_OP8b TMP1
| decode_RA8b RA
| daddu TMP0, DISPATCH, TMP1
| ld TMP0, 0(TMP0)
| jr TMP0
| daddu RA, RA, BASE
|.endmacro
|
|.macro ins_call
| // BASE = new base, RB = LFUNC/CFUNC, RC = nargs*8, PC = caller PC
| sd PC, FRAME_PC(BASE)
| ins_callt
|.endmacro
|
|//-----------------------------------------------------------------------
|
|.macro branch_RD
| srl TMP0, RD, 1
| lui AT, (-(BCBIAS_J*4 >> 16) & 65535)
| addu TMP0, TMP0, AT
| daddu PC, PC, TMP0
|.endmacro
|
|// Assumes DISPATCH is relative to GL.
#define DISPATCH_GL(field) (GG_DISP2G + (int)offsetof(global_State, field))
#define DISPATCH_J(field) (GG_DISP2J + (int)offsetof(jit_State, field))
#define GG_DISP2GOT (GG_OFS(got) - GG_OFS(dispatch))
#define DISPATCH_GOT(name) (GG_DISP2GOT + sizeof(void*)*LJ_GOT_##name)
|
#define PC2PROTO(field) ((int)offsetof(GCproto, field)-(int)sizeof(GCproto))
|
|.macro load_got, func
| ld CFUNCADDR, DISPATCH_GOT(func)(DISPATCH)
|.endmacro
|// Much faster. Sadly, there's no easy way to force the required code layout.
|// .macro call_intern, func; bal extern func; .endmacro
|.macro call_intern, func; jalr CFUNCADDR; .endmacro
|.macro call_extern; jalr CFUNCADDR; .endmacro
|.macro jmp_extern; jr CFUNCADDR; .endmacro
|
|.macro hotcheck, delta, target
| dsrl TMP1, PC, 1
| andi TMP1, TMP1, 126
| daddu TMP1, TMP1, DISPATCH
| lhu TMP2, GG_DISP2HOT(TMP1)
| addiu TMP2, TMP2, -delta
| bltz TMP2, target
|. sh TMP2, GG_DISP2HOT(TMP1)
|.endmacro
|
|.macro hotloop
| hotcheck HOTCOUNT_LOOP, ->vm_hotloop
|.endmacro
|
|.macro hotcall
| hotcheck HOTCOUNT_CALL, ->vm_hotcall
|.endmacro
|
|// Set current VM state. Uses TMP0.
|.macro li_vmstate, st; li TMP0, ~LJ_VMST_..st; .endmacro
|.macro st_vmstate; sw TMP0, DISPATCH_GL(vmstate)(DISPATCH); .endmacro
|
|// Move table write barrier back. Overwrites mark and tmp.
|.macro barrierback, tab, mark, tmp, target
| ld tmp, DISPATCH_GL(gc.grayagain)(DISPATCH)
| andi mark, mark, ~LJ_GC_BLACK & 255 // black2gray(tab)
| sd tab, DISPATCH_GL(gc.grayagain)(DISPATCH)
| sb mark, tab->marked
| b target
|. sd tmp, tab->gclist
|.endmacro
|
|// Clear type tag. Isolate lowest 14+32+1=47 bits of reg.
|.macro cleartp, reg; dextm reg, reg, 0, 14; .endmacro
|.macro cleartp, dst, reg; dextm dst, reg, 0, 14; .endmacro
|
|// Set type tag: Merge 17 type bits into bits [15+32=47, 31+32+1=64) of dst.
|.macro settp, dst, tp; dinsu dst, tp, 15, 31; .endmacro
|
|// Extract (negative) type tag.
|.macro gettp, dst, src; dsra dst, src, 47; .endmacro
|
|// Macros to check the TValue type and extract the GCobj. Branch on failure.
|.macro checktp, reg, tp, target
| gettp AT, reg
| daddiu AT, AT, tp
| bnez AT, target
|. cleartp reg
|.endmacro
|.macro checktp, dst, reg, tp, target
| gettp AT, reg
| daddiu AT, AT, tp
| bnez AT, target
|. cleartp dst, reg
|.endmacro
|.macro checkstr, reg, target; checktp reg, -LJ_TSTR, target; .endmacro
|.macro checktab, reg, target; checktp reg, -LJ_TTAB, target; .endmacro
|.macro checkfunc, reg, target; checktp reg, -LJ_TFUNC, target; .endmacro
|.macro checkint, reg, target // Caveat: has delay slot!
| gettp AT, reg
| bne AT, TISNUM, target
|.endmacro
|.macro checknum, reg, target // Caveat: has delay slot!
| gettp AT, reg
| sltiu AT, AT, LJ_TISNUM
| beqz AT, target
|.endmacro
|
|.macro mov_false, reg
| lu reg, 0x8000
| dsll reg, reg, 32
| not reg, reg
|.endmacro
|.macro mov_true, reg
| li reg, 0x0001
| dsll reg, reg, 48
| not reg, reg
|.endmacro
|
|//-----------------------------------------------------------------------
/* Generate subroutines used by opcodes and other parts of the VM. */
/* The .code_sub section should be last to help static branch prediction. */
static void build_subroutines(BuildCtx *ctx)
{
|.code_sub
|
|//-----------------------------------------------------------------------
|//-- Return handling ----------------------------------------------------
|//-----------------------------------------------------------------------
|
|->vm_returnp:
| // See vm_return. Also: TMP2 = previous base.
| andi AT, PC, FRAME_P
| beqz AT, ->cont_dispatch
|
| // Return from pcall or xpcall fast func.
|. mov_true TMP1
| ld PC, FRAME_PC(TMP2) // Fetch PC of previous frame.
| move BASE, TMP2 // Restore caller base.
| // Prepending may overwrite the pcall frame, so do it at the end.
| sd TMP1, -8(RA) // Prepend true to results.
| daddiu RA, RA, -8
|
|->vm_returnc:
| addiu RD, RD, 8 // RD = (nresults+1)*8.
| andi TMP0, PC, FRAME_TYPE
| beqz RD, ->vm_unwind_c_eh
|. li CRET1, LUA_YIELD
| beqz TMP0, ->BC_RET_Z // Handle regular return to Lua.
|. move MULTRES, RD
|
|->vm_return:
| // BASE = base, RA = resultptr, RD/MULTRES = (nresults+1)*8, PC = return
| // TMP0 = PC & FRAME_TYPE
| li TMP2, -8
| xori AT, TMP0, FRAME_C
| and TMP2, PC, TMP2
| bnez AT, ->vm_returnp
| dsubu TMP2, BASE, TMP2 // TMP2 = previous base.
|
| addiu TMP1, RD, -8
| sd TMP2, L->base
| li_vmstate C
| lw TMP2, SAVE_NRES
| daddiu BASE, BASE, -16
| st_vmstate
| beqz TMP1, >2
|. sll TMP2, TMP2, 3
|1:
| addiu TMP1, TMP1, -8
| ld CRET1, 0(RA)
| daddiu RA, RA, 8
| sd CRET1, 0(BASE)
| bnez TMP1, <1
|. daddiu BASE, BASE, 8
|
|2:
| bne TMP2, RD, >6
|3:
|. sd BASE, L->top // Store new top.
|
|->vm_leave_cp:
| ld TMP0, SAVE_CFRAME // Restore previous C frame.
| move CRET1, r0 // Ok return status for vm_pcall.
| sd TMP0, L->cframe
|
|->vm_leave_unw:
| restoreregs_ret
|
|6:
| ld TMP1, L->maxstack
| slt AT, TMP2, RD
| bnez AT, >7 // Less results wanted?
| // More results wanted. Check stack size and fill up results with nil.
|. slt AT, BASE, TMP1
| beqz AT, >8
|. nop
| sd TISNIL, 0(BASE)
| addiu RD, RD, 8
| b <2
|. daddiu BASE, BASE, 8
|
|7: // Less results wanted.
| subu TMP0, RD, TMP2
| dsubu TMP0, BASE, TMP0 // Either keep top or shrink it.
| b <3
|. movn BASE, TMP0, TMP2 // LUA_MULTRET+1 case?
|
|8: // Corner case: need to grow stack for filling up results.
| // This can happen if:
| // - A C function grows the stack (a lot).
| // - The GC shrinks the stack in between.
| // - A return back from a lua_call() with (high) nresults adjustment.
| load_got lj_state_growstack
| move MULTRES, RD
| srl CARG2, TMP2, 3
| call_intern lj_state_growstack // (lua_State *L, int n)
|. move CARG1, L
| lw TMP2, SAVE_NRES
| ld BASE, L->top // Need the (realloced) L->top in BASE.
| move RD, MULTRES
| b <2
|. sll TMP2, TMP2, 3
|
|->vm_unwind_c: // Unwind C stack, return from vm_pcall.
| // (void *cframe, int errcode)
| move sp, CARG1
| move CRET1, CARG2
|->vm_unwind_c_eh: // Landing pad for external unwinder.
| ld L, SAVE_L
| li TMP0, ~LJ_VMST_C
| ld GL:TMP1, L->glref
| b ->vm_leave_unw
|. sw TMP0, GL:TMP1->vmstate
|
|->vm_unwind_ff: // Unwind C stack, return from ff pcall.
| // (void *cframe)
| li AT, -4
| and sp, CARG1, AT
|->vm_unwind_ff_eh: // Landing pad for external unwinder.
| ld L, SAVE_L
| .FPU lui TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float).
| li TISNIL, LJ_TNIL
| li TISNUM, LJ_TISNUM
| ld BASE, L->base
| ld DISPATCH, L->glref // Setup pointer to dispatch table.
| .FPU mtc1 TMP3, TOBIT
| mov_false TMP1
| li_vmstate INTERP
| ld PC, FRAME_PC(BASE) // Fetch PC of previous frame.
| .FPU cvt.d.s TOBIT, TOBIT
| daddiu RA, BASE, -8 // Results start at BASE-8.
| daddiu DISPATCH, DISPATCH, GG_G2DISP
| sd TMP1, 0(RA) // Prepend false to error message.
| st_vmstate
| b ->vm_returnc
|. li RD, 16 // 2 results: false + error message.
|
|//-----------------------------------------------------------------------
|//-- Grow stack for calls -----------------------------------------------
|//-----------------------------------------------------------------------
|
|->vm_growstack_c: // Grow stack for C function.
| b >2
|. li CARG2, LUA_MINSTACK
|
|->vm_growstack_l: // Grow stack for Lua function.
| // BASE = new base, RA = BASE+framesize*8, RC = nargs*8, PC = first PC
| daddu RC, BASE, RC
| dsubu RA, RA, BASE
| sd BASE, L->base
| daddiu PC, PC, 4 // Must point after first instruction.
| sd RC, L->top
| srl CARG2, RA, 3
|2:
| // L->base = new base, L->top = top
| load_got lj_state_growstack
| sd PC, SAVE_PC
| call_intern lj_state_growstack // (lua_State *L, int n)
|. move CARG1, L
| ld BASE, L->base
| ld RC, L->top
| ld LFUNC:RB, FRAME_FUNC(BASE)
| dsubu RC, RC, BASE
| cleartp LFUNC:RB
| // BASE = new base, RB = LFUNC/CFUNC, RC = nargs*8, FRAME_PC(BASE) = PC
| ins_callt // Just retry the call.
|
|//-----------------------------------------------------------------------
|//-- Entry points into the assembler VM ---------------------------------
|//-----------------------------------------------------------------------
|
|->vm_resume: // Setup C frame and resume thread.
| // (lua_State *L, TValue *base, int nres1 = 0, ptrdiff_t ef = 0)
| saveregs
| move L, CARG1
| ld DISPATCH, L->glref // Setup pointer to dispatch table.
| move BASE, CARG2
| lbu TMP1, L->status
| sd L, SAVE_L
| li PC, FRAME_CP
| daddiu TMP0, sp, CFRAME_RESUME
| daddiu DISPATCH, DISPATCH, GG_G2DISP
| sw r0, SAVE_NRES
| sw r0, SAVE_ERRF
| sd CARG1, SAVE_PC // Any value outside of bytecode is ok.
| sd r0, SAVE_CFRAME
| beqz TMP1, >3
|. sd TMP0, L->cframe
|
| // Resume after yield (like a return).
| sd L, DISPATCH_GL(cur_L)(DISPATCH)
| move RA, BASE
| ld BASE, L->base
| ld TMP1, L->top
| ld PC, FRAME_PC(BASE)
| .FPU lui TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float).
| dsubu RD, TMP1, BASE
| .FPU mtc1 TMP3, TOBIT
| sb r0, L->status
| .FPU cvt.d.s TOBIT, TOBIT
| li_vmstate INTERP
| daddiu RD, RD, 8
| st_vmstate
| move MULTRES, RD
| andi TMP0, PC, FRAME_TYPE
| li TISNIL, LJ_TNIL
| beqz TMP0, ->BC_RET_Z
|. li TISNUM, LJ_TISNUM
| b ->vm_return
|. nop
|
|->vm_pcall: // Setup protected C frame and enter VM.
| // (lua_State *L, TValue *base, int nres1, ptrdiff_t ef)
| saveregs
| sw CARG4, SAVE_ERRF
| b >1
|. li PC, FRAME_CP
|
|->vm_call: // Setup C frame and enter VM.
| // (lua_State *L, TValue *base, int nres1)
| saveregs
| li PC, FRAME_C
|
|1: // Entry point for vm_pcall above (PC = ftype).
| ld TMP1, L:CARG1->cframe
| move L, CARG1
| sw CARG3, SAVE_NRES
| ld DISPATCH, L->glref // Setup pointer to dispatch table.
| sd CARG1, SAVE_L
| move BASE, CARG2
| daddiu DISPATCH, DISPATCH, GG_G2DISP
| sd CARG1, SAVE_PC // Any value outside of bytecode is ok.
| sd TMP1, SAVE_CFRAME
| sd sp, L->cframe // Add our C frame to cframe chain.
|
|3: // Entry point for vm_cpcall/vm_resume (BASE = base, PC = ftype).
| sd L, DISPATCH_GL(cur_L)(DISPATCH)
| ld TMP2, L->base // TMP2 = old base (used in vmeta_call).
| .FPU lui TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float).
| ld TMP1, L->top
| .FPU mtc1 TMP3, TOBIT
| daddu PC, PC, BASE
| dsubu NARGS8:RC, TMP1, BASE
| li TISNUM, LJ_TISNUM
| dsubu PC, PC, TMP2 // PC = frame delta + frame type
| .FPU cvt.d.s TOBIT, TOBIT
| li_vmstate INTERP
| li TISNIL, LJ_TNIL
| st_vmstate
|
|->vm_call_dispatch:
| // TMP2 = old base, BASE = new base, RC = nargs*8, PC = caller PC
| ld LFUNC:RB, FRAME_FUNC(BASE)
| checkfunc LFUNC:RB, ->vmeta_call
|
|->vm_call_dispatch_f:
| ins_call
| // BASE = new base, RB = func, RC = nargs*8, PC = caller PC
|
|->vm_cpcall: // Setup protected C frame, call C.
| // (lua_State *L, lua_CFunction func, void *ud, lua_CPFunction cp)
| saveregs
| move L, CARG1
| ld TMP0, L:CARG1->stack
| sd CARG1, SAVE_L
| ld TMP1, L->top
| ld DISPATCH, L->glref // Setup pointer to dispatch table.
| sd CARG1, SAVE_PC // Any value outside of bytecode is ok.
| dsubu TMP0, TMP0, TMP1 // Compute -savestack(L, L->top).
| ld TMP1, L->cframe
| daddiu DISPATCH, DISPATCH, GG_G2DISP
| sw TMP0, SAVE_NRES // Neg. delta means cframe w/o frame.
| sw r0, SAVE_ERRF // No error function.
| sd TMP1, SAVE_CFRAME
| sd sp, L->cframe // Add our C frame to cframe chain.
| sd L, DISPATCH_GL(cur_L)(DISPATCH)
| jalr CARG4 // (lua_State *L, lua_CFunction func, void *ud)
|. move CFUNCADDR, CARG4
| move BASE, CRET1
| bnez CRET1, <3 // Else continue with the call.
|. li PC, FRAME_CP
| b ->vm_leave_cp // No base? Just remove C frame.
|. nop
|
|//-----------------------------------------------------------------------
|//-- Metamethod handling ------------------------------------------------
|//-----------------------------------------------------------------------
|
|// The lj_meta_* functions (except for lj_meta_cat) don't reallocate the
|// stack, so BASE doesn't need to be reloaded across these calls.
|
|//-- Continuation dispatch ----------------------------------------------
|
|->cont_dispatch:
| // BASE = meta base, RA = resultptr, RD = (nresults+1)*8
| ld TMP0, -32(BASE) // Continuation.
| move RB, BASE
| move BASE, TMP2 // Restore caller BASE.
| ld LFUNC:TMP1, FRAME_FUNC(TMP2)
|.if FFI
| sltiu AT, TMP0, 2
|.endif
| ld PC, -24(RB) // Restore PC from [cont|PC].
| cleartp LFUNC:TMP1
| daddu TMP2, RA, RD
| ld TMP1, LFUNC:TMP1->pc
|.if FFI
| bnez AT, >1
|.endif
|. sd TISNIL, -8(TMP2) // Ensure one valid arg.
| // BASE = base, RA = resultptr, RB = meta base
| jr TMP0 // Jump to continuation.
|. ld KBASE, PC2PROTO(k)(TMP1)
|
|.if FFI
|1:
| bnez TMP0, ->cont_ffi_callback // cont = 1: return from FFI callback.
| // cont = 0: tailcall from C function.
|. daddiu TMP1, RB, -32
| b ->vm_call_tail
|. dsubu RC, TMP1, BASE
|.endif
|
|->cont_cat: // RA = resultptr, RB = meta base
| lw INS, -4(PC)
| daddiu CARG2, RB, -32
| ld CRET1, 0(RA)
| decode_RB8a MULTRES, INS
| decode_RA8a RA, INS
| decode_RB8b MULTRES
| decode_RA8b RA
| daddu TMP1, BASE, MULTRES
| sd BASE, L->base
| dsubu CARG3, CARG2, TMP1
| bne TMP1, CARG2, ->BC_CAT_Z
|. sd CRET1, 0(CARG2)
| daddu RA, BASE, RA
| b ->cont_nop
|. sd CRET1, 0(RA)
|
|//-- Table indexing metamethods -----------------------------------------
|
|->vmeta_tgets1:
| daddiu CARG3, DISPATCH, DISPATCH_GL(tmptv)
| li TMP0, LJ_TSTR
| settp STR:RC, TMP0
| b >1
|. sd STR:RC, 0(CARG3)
|
|->vmeta_tgets:
| daddiu CARG2, DISPATCH, DISPATCH_GL(tmptv)
| li TMP0, LJ_TTAB
| li TMP1, LJ_TSTR
| settp TAB:RB, TMP0
| daddiu CARG3, DISPATCH, DISPATCH_GL(tmptv2)
| sd TAB:RB, 0(CARG2)
| settp STR:RC, TMP1
| b >1
|. sd STR:RC, 0(CARG3)
|
|->vmeta_tgetb: // TMP0 = index
| daddiu CARG3, DISPATCH, DISPATCH_GL(tmptv)
| settp TMP0, TISNUM
| sd TMP0, 0(CARG3)
|
|->vmeta_tgetv:
|1:
| load_got lj_meta_tget
| sd BASE, L->base
| sd PC, SAVE_PC
| call_intern lj_meta_tget // (lua_State *L, TValue *o, TValue *k)
|. move CARG1, L
| // Returns TValue * (finished) or NULL (metamethod).
| beqz CRET1, >3
|. daddiu TMP1, BASE, -FRAME_CONT
| ld CARG1, 0(CRET1)
| ins_next1
| sd CARG1, 0(RA)
| ins_next2
|
|3: // Call __index metamethod.
| // BASE = base, L->top = new base, stack = cont/func/t/k
| ld BASE, L->top
| sd PC, -24(BASE) // [cont|PC]
| dsubu PC, BASE, TMP1
| ld LFUNC:RB, FRAME_FUNC(BASE) // Guaranteed to be a function here.
| cleartp LFUNC:RB
| b ->vm_call_dispatch_f
|. li NARGS8:RC, 16 // 2 args for func(t, k).
|
|->vmeta_tgetr:
| load_got lj_tab_getinth
| call_intern lj_tab_getinth // (GCtab *t, int32_t key)
|. nop
| // Returns cTValue * or NULL.
| beqz CRET1, ->BC_TGETR_Z
|. move CARG2, TISNIL
| b ->BC_TGETR_Z
|. ld CARG2, 0(CRET1)
|
|//-----------------------------------------------------------------------
|
|->vmeta_tsets1:
| daddiu CARG3, DISPATCH, DISPATCH_GL(tmptv)
| li TMP0, LJ_TSTR
| settp STR:RC, TMP0
| b >1
|. sd STR:RC, 0(CARG3)
|
|->vmeta_tsets:
| daddiu CARG2, DISPATCH, DISPATCH_GL(tmptv)
| li TMP0, LJ_TTAB
| li TMP1, LJ_TSTR
| settp TAB:RB, TMP0
| daddiu CARG3, DISPATCH, DISPATCH_GL(tmptv2)
| sd TAB:RB, 0(CARG2)
| settp STR:RC, TMP1
| b >1
|. sd STR:RC, 0(CARG3)
|
|->vmeta_tsetb: // TMP0 = index
| daddiu CARG3, DISPATCH, DISPATCH_GL(tmptv)
| settp TMP0, TISNUM
| sd TMP0, 0(CARG3)
|
|->vmeta_tsetv:
|1:
| load_got lj_meta_tset
| sd BASE, L->base
| sd PC, SAVE_PC
| call_intern lj_meta_tset // (lua_State *L, TValue *o, TValue *k)
|. move CARG1, L
| // Returns TValue * (finished) or NULL (metamethod).
| beqz CRET1, >3
|. ld CARG1, 0(RA)
| // NOBARRIER: lj_meta_tset ensures the table is not black.
| ins_next1
| sd CARG1, 0(CRET1)
| ins_next2
|
|3: // Call __newindex metamethod.
| // BASE = base, L->top = new base, stack = cont/func/t/k/(v)
| daddiu TMP1, BASE, -FRAME_CONT
| ld BASE, L->top
| sd PC, -24(BASE) // [cont|PC]
| dsubu PC, BASE, TMP1
| ld LFUNC:RB, FRAME_FUNC(BASE) // Guaranteed to be a function here.
| cleartp LFUNC:RB
| sd CARG1, 16(BASE) // Copy value to third argument.
| b ->vm_call_dispatch_f
|. li NARGS8:RC, 24 // 3 args for func(t, k, v)
|
|->vmeta_tsetr:
| load_got lj_tab_setinth
| sd BASE, L->base
| sd PC, SAVE_PC
| call_intern lj_tab_setinth // (lua_State *L, GCtab *t, int32_t key)
|. move CARG1, L
| // Returns TValue *.
| b ->BC_TSETR_Z
|. nop
|
|//-- Comparison metamethods ---------------------------------------------
|
|->vmeta_comp:
| // RA/RD point to o1/o2.
| move CARG2, RA
| move CARG3, RD
| load_got lj_meta_comp
| daddiu PC, PC, -4
| sd BASE, L->base
| sd PC, SAVE_PC
| decode_OP1 CARG4, INS
| call_intern lj_meta_comp // (lua_State *L, TValue *o1, *o2, int op)
|. move CARG1, L
| // Returns 0/1 or TValue * (metamethod).
|3:
| sltiu AT, CRET1, 2
| beqz AT, ->vmeta_binop
| negu TMP2, CRET1
|4:
| lhu RD, OFS_RD(PC)
| daddiu PC, PC, 4
| lui TMP1, (-(BCBIAS_J*4 >> 16) & 65535)
| sll RD, RD, 2
| addu RD, RD, TMP1
| and RD, RD, TMP2
| daddu PC, PC, RD
|->cont_nop:
| ins_next
|
|->cont_ra: // RA = resultptr
| lbu TMP1, -4+OFS_RA(PC)
| ld CRET1, 0(RA)
| sll TMP1, TMP1, 3
| daddu TMP1, BASE, TMP1
| b ->cont_nop
|. sd CRET1, 0(TMP1)
|
|->cont_condt: // RA = resultptr
| ld TMP0, 0(RA)
| gettp TMP0, TMP0
| sltiu AT, TMP0, LJ_TISTRUECOND
| b <4
|. negu TMP2, AT // Branch if result is true.
|
|->cont_condf: // RA = resultptr
| ld TMP0, 0(RA)
| gettp TMP0, TMP0
| sltiu AT, TMP0, LJ_TISTRUECOND
| b <4
|. addiu TMP2, AT, -1 // Branch if result is false.
|
|->vmeta_equal:
| // CARG1/CARG2 point to o1/o2. TMP0 is set to 0/1.
| load_got lj_meta_equal
| cleartp LFUNC:CARG3, CARG2
| cleartp LFUNC:CARG2, CARG1
| move CARG4, TMP0
| daddiu PC, PC, -4
| sd BASE, L->base
| sd PC, SAVE_PC
| call_intern lj_meta_equal // (lua_State *L, GCobj *o1, *o2, int ne)
|. move CARG1, L
| // Returns 0/1 or TValue * (metamethod).
| b <3
|. nop
|
|->vmeta_equal_cd:
|.if FFI
| load_got lj_meta_equal_cd
| move CARG2, INS
| daddiu PC, PC, -4
| sd BASE, L->base
| sd PC, SAVE_PC
| call_intern lj_meta_equal_cd // (lua_State *L, BCIns op)
|. move CARG1, L
| // Returns 0/1 or TValue * (metamethod).
| b <3
|. nop
|.endif
|
|->vmeta_istype:
| load_got lj_meta_istype
| daddiu PC, PC, -4
| sd BASE, L->base
| srl CARG2, RA, 3
| srl CARG3, RD, 3
| sd PC, SAVE_PC
| call_intern lj_meta_istype // (lua_State *L, BCReg ra, BCReg tp)
|. move CARG1, L
| b ->cont_nop
|. nop
|
|//-- Arithmetic metamethods ---------------------------------------------
|
|->vmeta_unm:
| move RC, RB
|
|->vmeta_arith:
| load_got lj_meta_arith
| sd BASE, L->base
| move CARG2, RA
| sd PC, SAVE_PC
| move CARG3, RB
| move CARG4, RC
| decode_OP1 CARG5, INS // CARG5 == RB.
| call_intern lj_meta_arith // (lua_State *L, TValue *ra,*rb,*rc, BCReg op)
|. move CARG1, L
| // Returns NULL (finished) or TValue * (metamethod).
| beqz CRET1, ->cont_nop
|. nop
|
| // Call metamethod for binary op.
|->vmeta_binop:
| // BASE = old base, CRET1 = new base, stack = cont/func/o1/o2
| dsubu TMP1, CRET1, BASE
| sd PC, -24(CRET1) // [cont|PC]
| move TMP2, BASE
| daddiu PC, TMP1, FRAME_CONT
| move BASE, CRET1
| b ->vm_call_dispatch
|. li NARGS8:RC, 16 // 2 args for func(o1, o2).
|
|->vmeta_len:
| // CARG2 already set by BC_LEN.
#if LJ_52
| move MULTRES, CARG1
#endif
| load_got lj_meta_len
| sd BASE, L->base
| sd PC, SAVE_PC
| call_intern lj_meta_len // (lua_State *L, TValue *o)
|. move CARG1, L
| // Returns NULL (retry) or TValue * (metamethod base).
#if LJ_52
| bnez CRET1, ->vmeta_binop // Binop call for compatibility.
|. nop
| b ->BC_LEN_Z
|. move CARG1, MULTRES
#else
| b ->vmeta_binop // Binop call for compatibility.
|. nop
#endif
|
|//-- Call metamethod ----------------------------------------------------
|
|->vmeta_call: // Resolve and call __call metamethod.
| // TMP2 = old base, BASE = new base, RC = nargs*8
| load_got lj_meta_call
| sd TMP2, L->base // This is the callers base!
| daddiu CARG2, BASE, -16
| sd PC, SAVE_PC
| daddu CARG3, BASE, RC
| move MULTRES, NARGS8:RC
| call_intern lj_meta_call // (lua_State *L, TValue *func, TValue *top)
|. move CARG1, L
| ld LFUNC:RB, FRAME_FUNC(BASE) // Guaranteed to be a function here.
| daddiu NARGS8:RC, MULTRES, 8 // Got one more argument now.
| cleartp LFUNC:RB
| ins_call
|
|->vmeta_callt: // Resolve __call for BC_CALLT.
| // BASE = old base, RA = new base, RC = nargs*8
| load_got lj_meta_call
| sd BASE, L->base
| daddiu CARG2, RA, -16
| sd PC, SAVE_PC
| daddu CARG3, RA, RC
| move MULTRES, NARGS8:RC
| call_intern lj_meta_call // (lua_State *L, TValue *func, TValue *top)
|. move CARG1, L
| ld RB, FRAME_FUNC(RA) // Guaranteed to be a function here.
| ld TMP1, FRAME_PC(BASE)
| daddiu NARGS8:RC, MULTRES, 8 // Got one more argument now.
| b ->BC_CALLT_Z
|. cleartp LFUNC:CARG3, RB
|
|//-- Argument coercion for 'for' statement ------------------------------
|
|->vmeta_for:
| load_got lj_meta_for
| sd BASE, L->base
| move CARG2, RA
| sd PC, SAVE_PC
| move MULTRES, INS
| call_intern lj_meta_for // (lua_State *L, TValue *base)
|. move CARG1, L
|.if JIT
| decode_OP1 TMP0, MULTRES
| li AT, BC_JFORI
|.endif
| decode_RA8a RA, MULTRES
| decode_RD8a RD, MULTRES
| decode_RA8b RA
|.if JIT
| beq TMP0, AT, =>BC_JFORI
|. decode_RD8b RD
| b =>BC_FORI
|. nop
|.else
| b =>BC_FORI
|. decode_RD8b RD
|.endif
|
|//-----------------------------------------------------------------------
|//-- Fast functions -----------------------------------------------------
|//-----------------------------------------------------------------------
|
|.macro .ffunc, name
|->ff_ .. name:
|.endmacro
|
|.macro .ffunc_1, name
|->ff_ .. name:
| beqz NARGS8:RC, ->fff_fallback
|. ld CARG1, 0(BASE)
|.endmacro
|
|.macro .ffunc_2, name
|->ff_ .. name:
| sltiu AT, NARGS8:RC, 16
| ld CARG1, 0(BASE)
| bnez AT, ->fff_fallback
|. ld CARG2, 8(BASE)
|.endmacro
|
|.macro .ffunc_n, name // Caveat: has delay slot!
|->ff_ .. name:
| ld CARG1, 0(BASE)
| beqz NARGS8:RC, ->fff_fallback
| // Either ldc1 or the 1st instruction of checknum is in the delay slot.
| .FPU ldc1 FARG1, 0(BASE)
| checknum CARG1, ->fff_fallback
|.endmacro
|
|.macro .ffunc_nn, name // Caveat: has delay slot!
|->ff_ .. name:
| ld CARG1, 0(BASE)
| sltiu AT, NARGS8:RC, 16
| ld CARG2, 8(BASE)
| bnez AT, ->fff_fallback
|. gettp TMP0, CARG1
| gettp TMP1, CARG2
| sltiu TMP0, TMP0, LJ_TISNUM
| sltiu TMP1, TMP1, LJ_TISNUM
| .FPU ldc1 FARG1, 0(BASE)
| and TMP0, TMP0, TMP1
| .FPU ldc1 FARG2, 8(BASE)
| beqz TMP0, ->fff_fallback
|.endmacro
|
|// Inlined GC threshold check. Caveat: uses TMP0 and TMP1 and has delay slot!
|.macro ffgccheck
| ld TMP0, DISPATCH_GL(gc.total)(DISPATCH)
| ld TMP1, DISPATCH_GL(gc.threshold)(DISPATCH)
| dsubu AT, TMP0, TMP1
| bgezal AT, ->fff_gcstep
|.endmacro
|
|//-- Base library: checks -----------------------------------------------
|.ffunc_1 assert
| gettp AT, CARG1
| sltiu AT, AT, LJ_TISTRUECOND
| beqz AT, ->fff_fallback
|. daddiu RA, BASE, -16
| ld PC, FRAME_PC(BASE)
| addiu RD, NARGS8:RC, 8 // Compute (nresults+1)*8.
| daddu TMP2, RA, RD
| daddiu TMP1, BASE, 8
| beq BASE, TMP2, ->fff_res // Done if exactly 1 argument.
|. sd CARG1, 0(RA)
|1:
| ld CRET1, 0(TMP1)
| sd CRET1, -16(TMP1)
| bne TMP1, TMP2, <1
|. daddiu TMP1, TMP1, 8
| b ->fff_res
|. nop
|
|.ffunc_1 type
| gettp TMP0, CARG1
| sltu TMP1, TISNUM, TMP0
| not TMP2, TMP0
| li TMP3, ~LJ_TISNUM
| movz TMP2, TMP3, TMP1
| dsll TMP2, TMP2, 3
| daddu TMP2, CFUNC:RB, TMP2
| b ->fff_restv
|. ld CARG1, CFUNC:TMP2->upvalue
|
|//-- Base library: getters and setters ---------------------------------
|
|.ffunc_1 getmetatable
| gettp TMP2, CARG1
| daddiu TMP0, TMP2, -LJ_TTAB
| daddiu TMP1, TMP2, -LJ_TUDATA
| movn TMP0, TMP1, TMP0
| bnez TMP0, >6
|. cleartp TAB:CARG1
|1: // Field metatable must be at same offset for GCtab and GCudata!
| ld TAB:RB, TAB:CARG1->metatable
|2:
| ld STR:RC, DISPATCH_GL(gcroot[GCROOT_MMNAME+MM_metatable])(DISPATCH)
| beqz TAB:RB, ->fff_restv
|. li CARG1, LJ_TNIL
| lw TMP0, TAB:RB->hmask
| lw TMP1, STR:RC->hash
| ld NODE:TMP2, TAB:RB->node
| and TMP1, TMP1, TMP0 // idx = str->hash & tab->hmask
| dsll TMP0, TMP1, 5
| dsll TMP1, TMP1, 3
| dsubu TMP1, TMP0, TMP1
| daddu NODE:TMP2, NODE:TMP2, TMP1 // node = tab->node + (idx*32-idx*8)
| li CARG4, LJ_TSTR
| settp STR:RC, CARG4 // Tagged key to look for.
|3: // Rearranged logic, because we expect _not_ to find the key.
| ld TMP0, NODE:TMP2->key
| ld CARG1, NODE:TMP2->val
| ld NODE:TMP2, NODE:TMP2->next
| beq RC, TMP0, >5
|. li AT, LJ_TTAB
| bnez NODE:TMP2, <3
|. nop
|4:
| move CARG1, RB
| b ->fff_restv // Not found, keep default result.
|. settp CARG1, AT
|5:
| bne CARG1, TISNIL, ->fff_restv
|. nop
| b <4 // Ditto for nil value.
|. nop
|
|6:
| sltiu AT, TMP2, LJ_TISNUM
| movn TMP2, TISNUM, AT
| dsll TMP2, TMP2, 3
| dsubu TMP0, DISPATCH, TMP2
| b <2
|. ld TAB:RB, DISPATCH_GL(gcroot[GCROOT_BASEMT])-8(TMP0)
|
|.ffunc_2 setmetatable
| // Fast path: no mt for table yet and not clearing the mt.
| checktp TMP1, CARG1, -LJ_TTAB, ->fff_fallback
| gettp TMP3, CARG2
| ld TAB:TMP0, TAB:TMP1->metatable
| lbu TMP2, TAB:TMP1->marked
| daddiu AT, TMP3, -LJ_TTAB
| cleartp TAB:CARG2
| or AT, AT, TAB:TMP0
| bnez AT, ->fff_fallback
|. andi AT, TMP2, LJ_GC_BLACK // isblack(table)
| beqz AT, ->fff_restv
|. sd TAB:CARG2, TAB:TMP1->metatable
| barrierback TAB:TMP1, TMP2, TMP0, ->fff_restv
|
|.ffunc rawget
| ld CARG2, 0(BASE)
| sltiu AT, NARGS8:RC, 16
| load_got lj_tab_get
| gettp TMP0, CARG2
| cleartp CARG2
| daddiu TMP0, TMP0, -LJ_TTAB
| or AT, AT, TMP0
| bnez AT, ->fff_fallback
|. daddiu CARG3, BASE, 8
| call_intern lj_tab_get // (lua_State *L, GCtab *t, cTValue *key)
|. move CARG1, L
| b ->fff_restv
|. ld CARG1, 0(CRET1)
|
|//-- Base library: conversions ------------------------------------------
|
|.ffunc tonumber
| // Only handles the number case inline (without a base argument).
| ld CARG1, 0(BASE)
| xori AT, NARGS8:RC, 8 // Exactly one number argument.
| gettp TMP1, CARG1
| sltu TMP0, TISNUM, TMP1
| or AT, AT, TMP0
| bnez AT, ->fff_fallback
|. nop
| b ->fff_restv
|. nop
|
|.ffunc_1 tostring
| // Only handles the string or number case inline.
| gettp TMP0, CARG1
| daddiu AT, TMP0, -LJ_TSTR
| // A __tostring method in the string base metatable is ignored.
| beqz AT, ->fff_restv // String key?
| // Handle numbers inline, unless a number base metatable is present.
|. ld TMP1, DISPATCH_GL(gcroot[GCROOT_BASEMT_NUM])(DISPATCH)
| sltu TMP0, TISNUM, TMP0
| or TMP0, TMP0, TMP1
| bnez TMP0, ->fff_fallback
|. sd BASE, L->base // Add frame since C call can throw.
| ffgccheck
|. sd PC, SAVE_PC // Redundant (but a defined value).
| load_got lj_strfmt_number
| move CARG1, L
| call_intern lj_strfmt_number // (lua_State *L, cTValue *o)
|. move CARG2, BASE
| // Returns GCstr *.
| li AT, LJ_TSTR
| settp CRET1, AT
| b ->fff_restv
|. move CARG1, CRET1
|
|//-- Base library: iterators -------------------------------------------
|
|.ffunc_1 next
| checktp CARG2, CARG1, -LJ_TTAB, ->fff_fallback
| daddu TMP2, BASE, NARGS8:RC
| sd TISNIL, 0(TMP2) // Set missing 2nd arg to nil.
| ld PC, FRAME_PC(BASE)
| load_got lj_tab_next
| sd BASE, L->base // Add frame since C call can throw.
| sd BASE, L->top // Dummy frame length is ok.
| daddiu CARG3, BASE, 8
| sd PC, SAVE_PC
| call_intern lj_tab_next // (lua_State *L, GCtab *t, TValue *key)
|. move CARG1, L
| // Returns 0 at end of traversal.
| beqz CRET1, ->fff_restv // End of traversal: return nil.
|. move CARG1, TISNIL
| ld TMP0, 8(BASE)
| daddiu RA, BASE, -16
| ld TMP2, 16(BASE)
| sd TMP0, 0(RA)
| sd TMP2, 8(RA)
| b ->fff_res
|. li RD, (2+1)*8
|
|.ffunc_1 pairs
| checktp TAB:TMP1, CARG1, -LJ_TTAB, ->fff_fallback
| ld PC, FRAME_PC(BASE)
#if LJ_52
| ld TAB:TMP2, TAB:TMP1->metatable
| ld TMP0, CFUNC:RB->upvalue[0]
| bnez TAB:TMP2, ->fff_fallback
#else
| ld TMP0, CFUNC:RB->upvalue[0]
#endif
|. daddiu RA, BASE, -16
| sd TISNIL, 0(BASE)
| sd CARG1, -8(BASE)
| sd TMP0, 0(RA)
| b ->fff_res
|. li RD, (3+1)*8
|
|.ffunc_2 ipairs_aux
| checktab CARG1, ->fff_fallback
| checkint CARG2, ->fff_fallback
|. lw TMP0, TAB:CARG1->asize
| ld TMP1, TAB:CARG1->array
| ld PC, FRAME_PC(BASE)
| sextw TMP2, CARG2
| addiu TMP2, TMP2, 1
| sltu AT, TMP2, TMP0
| daddiu RA, BASE, -16
| zextw TMP0, TMP2
| settp TMP0, TISNUM
| beqz AT, >2 // Not in array part?
|. sd TMP0, 0(RA)
| dsll TMP3, TMP2, 3
| daddu TMP3, TMP1, TMP3
| ld TMP1, 0(TMP3)
|1:
| beq TMP1, TISNIL, ->fff_res // End of iteration, return 0 results.
|. li RD, (0+1)*8
| sd TMP1, -8(BASE)
| b ->fff_res
|. li RD, (2+1)*8
|2: // Check for empty hash part first. Otherwise call C function.
| lw TMP0, TAB:CARG1->hmask
| load_got lj_tab_getinth
| beqz TMP0, ->fff_res
|. li RD, (0+1)*8
| call_intern lj_tab_getinth // (GCtab *t, int32_t key)
|. move CARG2, TMP2
| // Returns cTValue * or NULL.
| beqz CRET1, ->fff_res
|. li RD, (0+1)*8
| b <1
|. ld TMP1, 0(CRET1)
|
|.ffunc_1 ipairs
| checktp TAB:TMP1, CARG1, -LJ_TTAB, ->fff_fallback
| ld PC, FRAME_PC(BASE)
#if LJ_52
| ld TAB:TMP2, TAB:TMP1->metatable
| ld CFUNC:TMP0, CFUNC:RB->upvalue[0]
| bnez TAB:TMP2, ->fff_fallback
#else
| ld TMP0, CFUNC:RB->upvalue[0]
#endif
| daddiu RA, BASE, -16
| dsll AT, TISNUM, 47
| sd CARG1, -8(BASE)
| sd AT, 0(BASE)
| sd CFUNC:TMP0, 0(RA)
| b ->fff_res
|. li RD, (3+1)*8
|
|//-- Base library: catch errors ----------------------------------------
|
|.ffunc pcall
| daddiu NARGS8:RC, NARGS8:RC, -8
| lbu TMP3, DISPATCH_GL(hookmask)(DISPATCH)
| bltz NARGS8:RC, ->fff_fallback
|. move TMP2, BASE
| daddiu BASE, BASE, 16
| // Remember active hook before pcall.
| srl TMP3, TMP3, HOOK_ACTIVE_SHIFT
| andi TMP3, TMP3, 1
| daddiu PC, TMP3, 16+FRAME_PCALL
| beqz NARGS8:RC, ->vm_call_dispatch
|1:
|. daddu TMP0, BASE, NARGS8:RC
|2:
| ld TMP1, -16(TMP0)
| sd TMP1, -8(TMP0)
| daddiu TMP0, TMP0, -8
| bne TMP0, BASE, <2
|. nop
| b ->vm_call_dispatch
|. nop
|
|.ffunc xpcall
| daddiu NARGS8:TMP0, NARGS8:RC, -16
| ld CARG1, 0(BASE)
| ld CARG2, 8(BASE)
| bltz NARGS8:TMP0, ->fff_fallback
|. lbu TMP1, DISPATCH_GL(hookmask)(DISPATCH)
| gettp AT, CARG2
| daddiu AT, AT, -LJ_TFUNC
| bnez AT, ->fff_fallback // Traceback must be a function.
|. move TMP2, BASE
| move NARGS8:RC, NARGS8:TMP0
| daddiu BASE, BASE, 24
| // Remember active hook before pcall.
| srl TMP3, TMP3, HOOK_ACTIVE_SHIFT
| sd CARG2, 0(TMP2) // Swap function and traceback.
| andi TMP3, TMP3, 1
| sd CARG1, 8(TMP2)
| beqz NARGS8:RC, ->vm_call_dispatch
|. daddiu PC, TMP3, 24+FRAME_PCALL
| b <1
|. nop
|
|//-- Coroutine library --------------------------------------------------
|
|.macro coroutine_resume_wrap, resume
|.if resume
|.ffunc_1 coroutine_resume
| checktp CARG1, CARG1, -LJ_TTHREAD, ->fff_fallback
|.else
|.ffunc coroutine_wrap_aux
| ld L:CARG1, CFUNC:RB->upvalue[0].gcr
| cleartp L:CARG1
|.endif
| lbu TMP0, L:CARG1->status
| ld TMP1, L:CARG1->cframe
| ld CARG2, L:CARG1->top
| ld TMP2, L:CARG1->base
| addiu AT, TMP0, -LUA_YIELD
| daddu CARG3, CARG2, TMP0
| daddiu TMP3, CARG2, 8
| bgtz AT, ->fff_fallback // st > LUA_YIELD?
|. movn CARG2, TMP3, AT
| xor TMP2, TMP2, CARG3
| bnez TMP1, ->fff_fallback // cframe != 0?
|. or AT, TMP2, TMP0
| ld TMP0, L:CARG1->maxstack
| beqz AT, ->fff_fallback // base == top && st == 0?
|. ld PC, FRAME_PC(BASE)
| daddu TMP2, CARG2, NARGS8:RC
| sltu AT, TMP0, TMP2
| bnez AT, ->fff_fallback // Stack overflow?
|. sd PC, SAVE_PC
| sd BASE, L->base
|1:
|.if resume
| daddiu BASE, BASE, 8 // Keep resumed thread in stack for GC.
| daddiu NARGS8:RC, NARGS8:RC, -8
| daddiu TMP2, TMP2, -8
|.endif
| sd TMP2, L:CARG1->top
| daddu TMP1, BASE, NARGS8:RC
| move CARG3, CARG2
| sd BASE, L->top
|2: // Move args to coroutine.
| ld CRET1, 0(BASE)
| sltu AT, BASE, TMP1
| beqz AT, >3
|. daddiu BASE, BASE, 8
| sd CRET1, 0(CARG3)
| b <2
|. daddiu CARG3, CARG3, 8
|3:
| bal ->vm_resume // (lua_State *L, TValue *base, 0, 0)
|. move L:RA, L:CARG1
| // Returns thread status.
|4:
| ld TMP2, L:RA->base
| sltiu AT, CRET1, LUA_YIELD+1
| ld TMP3, L:RA->top
| li_vmstate INTERP
| ld BASE, L->base
| sd L, DISPATCH_GL(cur_L)(DISPATCH)
| st_vmstate
| beqz AT, >8
|. dsubu RD, TMP3, TMP2
| ld TMP0, L->maxstack
| beqz RD, >6 // No results?
|. daddu TMP1, BASE, RD
| sltu AT, TMP0, TMP1
| bnez AT, >9 // Need to grow stack?
|. daddu TMP3, TMP2, RD
| sd TMP2, L:RA->top // Clear coroutine stack.
| move TMP1, BASE
|5: // Move results from coroutine.
| ld CRET1, 0(TMP2)
| daddiu TMP2, TMP2, 8
| sltu AT, TMP2, TMP3
| sd CRET1, 0(TMP1)
| bnez AT, <5
|. daddiu TMP1, TMP1, 8
|6:
| andi TMP0, PC, FRAME_TYPE
|.if resume
| mov_true TMP1
| daddiu RA, BASE, -8
| sd TMP1, -8(BASE) // Prepend true to results.
| daddiu RD, RD, 16
|.else
| move RA, BASE
| daddiu RD, RD, 8
|.endif
|7:
| sd PC, SAVE_PC
| beqz TMP0, ->BC_RET_Z
|. move MULTRES, RD
| b ->vm_return
|. nop
|
|8: // Coroutine returned with error (at co->top-1).
|.if resume
| daddiu TMP3, TMP3, -8
| mov_false TMP1
| ld CRET1, 0(TMP3)
| sd TMP3, L:RA->top // Remove error from coroutine stack.
| li RD, (2+1)*8
| sd TMP1, -8(BASE) // Prepend false to results.
| daddiu RA, BASE, -8
| sd CRET1, 0(BASE) // Copy error message.
| b <7
|. andi TMP0, PC, FRAME_TYPE
|.else
| load_got lj_ffh_coroutine_wrap_err
| move CARG2, L:RA
| call_intern lj_ffh_coroutine_wrap_err // (lua_State *L, lua_State *co)
|. move CARG1, L
|.endif
|
|9: // Handle stack expansion on return from yield.
| load_got lj_state_growstack
| srl CARG2, RD, 3
| call_intern lj_state_growstack // (lua_State *L, int n)
|. move CARG1, L
| b <4
|. li CRET1, 0
|.endmacro
|
| coroutine_resume_wrap 1 // coroutine.resume
| coroutine_resume_wrap 0 // coroutine.wrap
|
|.ffunc coroutine_yield
| ld TMP0, L->cframe
| daddu TMP1, BASE, NARGS8:RC
| sd BASE, L->base
| andi TMP0, TMP0, CFRAME_RESUME
| sd TMP1, L->top
| beqz TMP0, ->fff_fallback
|. li CRET1, LUA_YIELD
| sd r0, L->cframe
| b ->vm_leave_unw
|. sb CRET1, L->status
|
|//-- Math library -------------------------------------------------------
|
|.ffunc_1 math_abs
| gettp CARG2, CARG1
| daddiu AT, CARG2, -LJ_TISNUM
| bnez AT, >1
|. sextw TMP1, CARG1
| sra TMP0, TMP1, 31 // Extract sign.
| xor TMP1, TMP1, TMP0
| dsubu CARG1, TMP1, TMP0
| dsll TMP3, CARG1, 32
| bgez TMP3, ->fff_restv
|. settp CARG1, TISNUM
| li CARG1, 0x41e0 // 2^31 as a double.
| b ->fff_restv
|. dsll CARG1, CARG1, 48
|1:
| sltiu AT, CARG2, LJ_TISNUM
| beqz AT, ->fff_fallback
|. dextm CARG1, CARG1, 0, 30
|// fallthrough
|
|->fff_restv:
| // CARG1 = TValue result.
| ld PC, FRAME_PC(BASE)
| daddiu RA, BASE, -16
| sd CARG1, -16(BASE)
|->fff_res1:
| // RA = results, PC = return.
| li RD, (1+1)*8
|->fff_res:
| // RA = results, RD = (nresults+1)*8, PC = return.
| andi TMP0, PC, FRAME_TYPE
| bnez TMP0, ->vm_return
|. move MULTRES, RD
| lw INS, -4(PC)
| decode_RB8a RB, INS
| decode_RB8b RB
|5:
| sltu AT, RD, RB
| bnez AT, >6 // More results expected?
|. decode_RA8a TMP0, INS
| decode_RA8b TMP0
| ins_next1
| // Adjust BASE. KBASE is assumed to be set for the calling frame.
| dsubu BASE, RA, TMP0
| ins_next2
|
|6: // Fill up results with nil.
| daddu TMP1, RA, RD
| daddiu RD, RD, 8
| b <5
|. sd TISNIL, -8(TMP1)
|
|.macro math_extern, func
| .ffunc_n math_ .. func
| load_got func
| call_extern
|. nop
| b ->fff_resn
|. nop
|.endmacro
|
|.macro math_extern2, func
| .ffunc_nn math_ .. func
|. load_got func
| call_extern
|. nop
| b ->fff_resn
|. nop
|.endmacro
|
|// TODO: Return integer type if result is integer (own sf implementation).
|.macro math_round, func
|->ff_math_ .. func:
| ld CARG1, 0(BASE)
| beqz NARGS8:RC, ->fff_fallback
|. gettp TMP0, CARG1
| beq TMP0, TISNUM, ->fff_restv
|. sltu AT, TMP0, TISNUM
| beqz AT, ->fff_fallback
|.if FPU
|. ldc1 FARG1, 0(BASE)
| bal ->vm_ .. func
|. nop
|.else
|. load_got func
| call_extern
|. nop
|.endif
| b ->fff_resn
|. nop
|.endmacro
|
| math_round floor
| math_round ceil
|
|.ffunc math_log
| li AT, 8
| bne NARGS8:RC, AT, ->fff_fallback // Exactly 1 argument.
|. ld CARG1, 0(BASE)
| checknum CARG1, ->fff_fallback
|. load_got log
|.if FPU
| call_extern
|. ldc1 FARG1, 0(BASE)
|.else
| call_extern
|. nop
|.endif
| b ->fff_resn
|. nop
|
| math_extern log10
| math_extern exp
| math_extern sin
| math_extern cos
| math_extern tan
| math_extern asin
| math_extern acos
| math_extern atan
| math_extern sinh
| math_extern cosh
| math_extern tanh
| math_extern2 pow
| math_extern2 atan2
| math_extern2 fmod
|
|.if FPU
|.ffunc_n math_sqrt
|. sqrt.d FRET1, FARG1
|// fallthrough to ->fff_resn
|.else
| math_extern sqrt
|.endif
|
|->fff_resn:
| ld PC, FRAME_PC(BASE)
| daddiu RA, BASE, -16
| b ->fff_res1
|.if FPU
|. sdc1 FRET1, 0(RA)
|.else
|. sd CRET1, 0(RA)
|.endif
|
|
|.ffunc_2 math_ldexp
| checknum CARG1, ->fff_fallback
| checkint CARG2, ->fff_fallback
|. load_got ldexp
| .FPU ldc1 FARG1, 0(BASE)
| call_extern
|. lw CARG2, 8+LO(BASE)
| b ->fff_resn
|. nop
|
|.ffunc_n math_frexp
| load_got frexp
| ld PC, FRAME_PC(BASE)
| call_extern
|. daddiu CARG2, DISPATCH, DISPATCH_GL(tmptv)
| lw TMP1, DISPATCH_GL(tmptv)(DISPATCH)
| daddiu RA, BASE, -16
|.if FPU
| mtc1 TMP1, FARG2
| sdc1 FRET1, 0(RA)
| cvt.d.w FARG2, FARG2
| sdc1 FARG2, 8(RA)
|.else
| sd CRET1, 0(RA)
| zextw TMP1, TMP1
| settp TMP1, TISNUM
| sd TMP1, 8(RA)
|.endif
| b ->fff_res
|. li RD, (2+1)*8
|
|.ffunc_n math_modf
| load_got modf
| ld PC, FRAME_PC(BASE)
| call_extern
|. daddiu CARG2, BASE, -16
| daddiu RA, BASE, -16
|.if FPU
| sdc1 FRET1, -8(BASE)
|.else
| sd CRET1, -8(BASE)
|.endif
| b ->fff_res
|. li RD, (2+1)*8
|
|.macro math_minmax, name, intins, fpins
| .ffunc_1 name
| daddu TMP3, BASE, NARGS8:RC
| checkint CARG1, >5
|. daddiu TMP2, BASE, 8
|1: // Handle integers.
| beq TMP2, TMP3, ->fff_restv
|. ld CARG2, 0(TMP2)
| checkint CARG2, >3
|. sextw CARG1, CARG1
| lw CARG2, LO(TMP2)
|. slt AT, CARG1, CARG2
| intins CARG1, CARG2, AT
| daddiu TMP2, TMP2, 8
| zextw CARG1, CARG1
| b <1
|. settp CARG1, TISNUM
|
|3: // Convert intermediate result to number and continue with number loop.
| checknum CARG2, ->fff_fallback
|.if FPU
|. mtc1 CARG1, FRET1
| cvt.d.w FRET1, FRET1
| b >7
|. ldc1 FARG1, 0(TMP2)
|.else
|. nop
| bal ->vm_sfi2d_1
|. nop
| b >7
|. nop
|.endif
|
|5:
| .FPU ldc1 FRET1, 0(BASE)
| checknum CARG1, ->fff_fallback
|6: // Handle numbers.
|. ld CARG2, 0(TMP2)
| beq TMP2, TMP3, ->fff_resn
|.if FPU
| ldc1 FARG1, 0(TMP2)
|.else
| move CRET1, CARG1
|.endif
| checknum CARG2, >8
|. nop
|7:
|.if FPU
| c.olt.d FRET1, FARG1
| fpins FRET1, FARG1
|.else
| bal ->vm_sfcmpolt
|. nop
| intins CARG1, CARG2, CRET1
|.endif
| b <6
|. daddiu TMP2, TMP2, 8
|
|8: // Convert integer to number and continue with number loop.
| checkint CARG2, ->fff_fallback
|.if FPU
|. lwc1 FARG1, LO(TMP2)
| b <7
|. cvt.d.w FARG1, FARG1
|.else
|. lw CARG2, LO(TMP2)
| bal ->vm_sfi2d_2
|. nop
| b <7
|. nop
|.endif
|
|.endmacro
|
| math_minmax math_min, movz, movf.d
| math_minmax math_max, movn, movt.d
|
|//-- String library -----------------------------------------------------
|
|.ffunc string_byte // Only handle the 1-arg case here.
| ld CARG1, 0(BASE)
| gettp TMP0, CARG1
| xori AT, NARGS8:RC, 8
| daddiu TMP0, TMP0, -LJ_TSTR
| or AT, AT, TMP0
| bnez AT, ->fff_fallback // Need exactly 1 string argument.
|. cleartp STR:CARG1
| lw TMP0, STR:CARG1->len
| daddiu RA, BASE, -16
| ld PC, FRAME_PC(BASE)
| sltu RD, r0, TMP0
| lbu TMP1, STR:CARG1[1] // Access is always ok (NUL at end).
| addiu RD, RD, 1
| sll RD, RD, 3 // RD = ((str->len != 0)+1)*8
| settp TMP1, TISNUM
| b ->fff_res
|. sd TMP1, 0(RA)
|
|.ffunc string_char // Only handle the 1-arg case here.
| ffgccheck
|. nop
| ld CARG1, 0(BASE)
| gettp TMP0, CARG1
| xori AT, NARGS8:RC, 8 // Exactly 1 argument.
| daddiu TMP0, TMP0, -LJ_TISNUM // Integer.
| li TMP1, 255
| sextw CARG1, CARG1
| or AT, AT, TMP0
| sltu TMP1, TMP1, CARG1 // !(255 < n).
| or AT, AT, TMP1
| bnez AT, ->fff_fallback
|. li CARG3, 1
| daddiu CARG2, sp, TMPD_OFS
| sb CARG1, TMPD
|->fff_newstr:
| load_got lj_str_new
| sd BASE, L->base
| sd PC, SAVE_PC
| call_intern lj_str_new // (lua_State *L, char *str, size_t l)
|. move CARG1, L
| // Returns GCstr *.
| ld BASE, L->base
|->fff_resstr:
| li AT, LJ_TSTR
| settp CRET1, AT
| b ->fff_restv
|. move CARG1, CRET1
|
|.ffunc string_sub
| ffgccheck
|. nop
| addiu AT, NARGS8:RC, -16
| ld TMP0, 0(BASE)
| bltz AT, ->fff_fallback
|. gettp TMP3, TMP0
| cleartp STR:CARG1, TMP0
| ld CARG2, 8(BASE)
| beqz AT, >1
|. li CARG4, -1
| ld CARG3, 16(BASE)
| checkint CARG3, ->fff_fallback
|. sextw CARG4, CARG3
|1:
| checkint CARG2, ->fff_fallback
|. li AT, LJ_TSTR
| bne TMP3, AT, ->fff_fallback
|. sextw CARG3, CARG2
| lw CARG2, STR:CARG1->len
| // STR:CARG1 = str, CARG2 = str->len, CARG3 = start, CARG4 = end
| slt AT, CARG4, r0
| addiu TMP0, CARG2, 1
| addu TMP1, CARG4, TMP0
| slt TMP3, CARG3, r0
| movn CARG4, TMP1, AT // if (end < 0) end += len+1
| addu TMP1, CARG3, TMP0
| movn CARG3, TMP1, TMP3 // if (start < 0) start += len+1
| li TMP2, 1
| slt AT, CARG4, r0
| slt TMP3, r0, CARG3
| movn CARG4, r0, AT // if (end < 0) end = 0
| movz CARG3, TMP2, TMP3 // if (start < 1) start = 1
| slt AT, CARG2, CARG4
| movn CARG4, CARG2, AT // if (end > len) end = len
| daddu CARG2, STR:CARG1, CARG3
| subu CARG3, CARG4, CARG3 // len = end - start
| daddiu CARG2, CARG2, sizeof(GCstr)-1
| bgez CARG3, ->fff_newstr
|. addiu CARG3, CARG3, 1 // len++
|->fff_emptystr: // Return empty string.
| li AT, LJ_TSTR
| daddiu STR:CARG1, DISPATCH, DISPATCH_GL(strempty)
| b ->fff_restv
|. settp CARG1, AT
|
|.macro ffstring_op, name
| .ffunc string_ .. name
| ffgccheck
|. nop
| beqz NARGS8:RC, ->fff_fallback
|. ld CARG2, 0(BASE)
| checkstr STR:CARG2, ->fff_fallback
| daddiu SBUF:CARG1, DISPATCH, DISPATCH_GL(tmpbuf)
| load_got lj_buf_putstr_ .. name
| ld TMP0, SBUF:CARG1->b
| sd L, SBUF:CARG1->L
| sd BASE, L->base
| sd TMP0, SBUF:CARG1->p
| call_intern extern lj_buf_putstr_ .. name
|. sd PC, SAVE_PC
| load_got lj_buf_tostr
| call_intern lj_buf_tostr
|. move SBUF:CARG1, SBUF:CRET1
| b ->fff_resstr
|. ld BASE, L->base
|.endmacro
|
|ffstring_op reverse
|ffstring_op lower
|ffstring_op upper
|
|//-- Bit library --------------------------------------------------------
|
|->vm_tobit_fb:
| beqz TMP1, ->fff_fallback
|.if FPU
|. ldc1 FARG1, 0(BASE)
| add.d FARG1, FARG1, TOBIT
| mfc1 CRET1, FARG1
| jr ra
|. zextw CRET1, CRET1
|.else
|// FP number to bit conversion for soft-float.
|->vm_tobit:
| dsll TMP0, CARG1, 1
| li CARG3, 1076
| dsrl AT, TMP0, 53
| dsubu CARG3, CARG3, AT
| sltiu AT, CARG3, 54
| beqz AT, >1
|. dextm TMP0, TMP0, 0, 20
| dinsu TMP0, AT, 21, 21
| slt AT, CARG1, r0
| dsrlv CRET1, TMP0, CARG3
| dsubu TMP0, r0, CRET1
| movn CRET1, TMP0, AT
| jr ra
|. zextw CRET1, CRET1
|1:
| jr ra
|. move CRET1, r0
|
|// FP number to int conversion with a check for soft-float.
|// Modifies CARG1, CRET1, CRET2, TMP0, AT.
|->vm_tointg:
|.if JIT
| dsll CRET2, CARG1, 1
| beqz CRET2, >2
|. li TMP0, 1076
| dsrl AT, CRET2, 53
| dsubu TMP0, TMP0, AT
| sltiu AT, TMP0, 54
| beqz AT, >1
|. dextm CRET2, CRET2, 0, 20
| dinsu CRET2, AT, 21, 21
| slt AT, CARG1, r0
| dsrlv CRET1, CRET2, TMP0
| dsubu CARG1, r0, CRET1
| movn CRET1, CARG1, AT
| li CARG1, 64
| subu TMP0, CARG1, TMP0
| dsllv CRET2, CRET2, TMP0 // Integer check.
| sextw AT, CRET1
| xor AT, CRET1, AT // Range check.
| jr ra
|. movz CRET2, AT, CRET2
|1:
| jr ra
|. li CRET2, 1
|2:
| jr ra
|. move CRET1, r0
|.endif
|.endif
|
|.macro .ffunc_bit, name
| .ffunc_1 bit_..name
| gettp TMP0, CARG1
| beq TMP0, TISNUM, >6
|. zextw CRET1, CARG1
| bal ->vm_tobit_fb
|. sltiu TMP1, TMP0, LJ_TISNUM
|6:
|.endmacro
|
|.macro .ffunc_bit_op, name, bins
| .ffunc_bit name
| daddiu TMP2, BASE, 8
| daddu TMP3, BASE, NARGS8:RC
|1:
| beq TMP2, TMP3, ->fff_resi
|. ld CARG1, 0(TMP2)
| gettp TMP0, CARG1
|.if FPU
| bne TMP0, TISNUM, >2
|. daddiu TMP2, TMP2, 8
| zextw CARG1, CARG1
| b <1
|. bins CRET1, CRET1, CARG1
|2:
| ldc1 FARG1, -8(TMP2)
| sltiu AT, TMP0, LJ_TISNUM
| beqz AT, ->fff_fallback
|. add.d FARG1, FARG1, TOBIT
| mfc1 CARG1, FARG1
| zextw CARG1, CARG1
| b <1
|. bins CRET1, CRET1, CARG1
|.else
| beq TMP0, TISNUM, >2
|. move CRET2, CRET1
| bal ->vm_tobit_fb
|. sltiu TMP1, TMP0, LJ_TISNUM
| move CARG1, CRET2
|2:
| zextw CARG1, CARG1
| bins CRET1, CRET1, CARG1
| b <1
|. daddiu TMP2, TMP2, 8
|.endif
|.endmacro
|
|.ffunc_bit_op band, and
|.ffunc_bit_op bor, or
|.ffunc_bit_op bxor, xor
|
|.ffunc_bit bswap
| dsrl TMP0, CRET1, 8
| dsrl TMP1, CRET1, 24
| andi TMP2, TMP0, 0xff00
| dins TMP1, CRET1, 24, 31
| dins TMP2, TMP0, 16, 23
| b ->fff_resi
|. or CRET1, TMP1, TMP2
|
|.ffunc_bit bnot
| not CRET1, CRET1
| b ->fff_resi
|. zextw CRET1, CRET1
|
|.macro .ffunc_bit_sh, name, shins, shmod
| .ffunc_2 bit_..name
| gettp TMP0, CARG1
| beq TMP0, TISNUM, >1
|. nop
| bal ->vm_tobit_fb
|. sltiu TMP1, TMP0, LJ_TISNUM
| move CARG1, CRET1
|1:
| gettp TMP0, CARG2
| bne TMP0, TISNUM, ->fff_fallback
|. zextw CARG2, CARG2
| sextw CARG1, CARG1
|.if shmod == 1
| negu CARG2, CARG2
|.endif
| shins CRET1, CARG1, CARG2
| b ->fff_resi
|. zextw CRET1, CRET1
|.endmacro
|
|.ffunc_bit_sh lshift, sllv, 0
|.ffunc_bit_sh rshift, srlv, 0
|.ffunc_bit_sh arshift, srav, 0
|.ffunc_bit_sh rol, rotrv, 1
|.ffunc_bit_sh ror, rotrv, 0
|
|.ffunc_bit tobit
|->fff_resi:
| ld PC, FRAME_PC(BASE)
| daddiu RA, BASE, -16
| settp CRET1, TISNUM
| b ->fff_res1
|. sd CRET1, -16(BASE)
|
|//-----------------------------------------------------------------------
|->fff_fallback: // Call fast function fallback handler.
| // BASE = new base, RB = CFUNC, RC = nargs*8
| ld TMP3, CFUNC:RB->f
| daddu TMP1, BASE, NARGS8:RC
| ld PC, FRAME_PC(BASE) // Fallback may overwrite PC.
| daddiu TMP0, TMP1, 8*LUA_MINSTACK
| ld TMP2, L->maxstack
| sd PC, SAVE_PC // Redundant (but a defined value).
| sltu AT, TMP2, TMP0
| sd BASE, L->base
| sd TMP1, L->top
| bnez AT, >5 // Need to grow stack.
|. move CFUNCADDR, TMP3
| jalr TMP3 // (lua_State *L)
|. move CARG1, L
| // Either throws an error, or recovers and returns -1, 0 or nresults+1.
| ld BASE, L->base
| sll RD, CRET1, 3
| bgtz CRET1, ->fff_res // Returned nresults+1?
|. daddiu RA, BASE, -16
|1: // Returned 0 or -1: retry fast path.
| ld LFUNC:RB, FRAME_FUNC(BASE)
| ld TMP0, L->top
| cleartp LFUNC:RB
| bnez CRET1, ->vm_call_tail // Returned -1?
|. dsubu NARGS8:RC, TMP0, BASE
| ins_callt // Returned 0: retry fast path.
|
|// Reconstruct previous base for vmeta_call during tailcall.
|->vm_call_tail:
| andi TMP0, PC, FRAME_TYPE
| li AT, -4
| bnez TMP0, >3
|. and TMP1, PC, AT
| lbu TMP1, OFS_RA(PC)
| sll TMP1, TMP1, 3
| addiu TMP1, TMP1, 16
|3:
| b ->vm_call_dispatch // Resolve again for tailcall.
|. dsubu TMP2, BASE, TMP1
|
|5: // Grow stack for fallback handler.
| load_got lj_state_growstack
| li CARG2, LUA_MINSTACK
| call_intern lj_state_growstack // (lua_State *L, int n)
|. move CARG1, L
| ld BASE, L->base
| b <1
|. li CRET1, 0 // Force retry.
|
|->fff_gcstep: // Call GC step function.
| // BASE = new base, RC = nargs*8
| move MULTRES, ra
| load_got lj_gc_step
| sd BASE, L->base
| daddu TMP0, BASE, NARGS8:RC
| sd PC, SAVE_PC // Redundant (but a defined value).
| sd TMP0, L->top
| call_intern lj_gc_step // (lua_State *L)
|. move CARG1, L
| ld BASE, L->base
| move ra, MULTRES
| ld TMP0, L->top
| ld CFUNC:RB, FRAME_FUNC(BASE)
| cleartp CFUNC:RB
| jr ra
|. dsubu NARGS8:RC, TMP0, BASE
|
|//-----------------------------------------------------------------------
|//-- Special dispatch targets -------------------------------------------
|//-----------------------------------------------------------------------
|
|->vm_record: // Dispatch target for recording phase.
|.if JIT
| lbu TMP3, DISPATCH_GL(hookmask)(DISPATCH)
| andi AT, TMP3, HOOK_VMEVENT // No recording while in vmevent.
| bnez AT, >5
| // Decrement the hookcount for consistency, but always do the call.
|. lw TMP2, DISPATCH_GL(hookcount)(DISPATCH)
| andi AT, TMP3, HOOK_ACTIVE
| bnez AT, >1
|. addiu TMP2, TMP2, -1
| andi AT, TMP3, LUA_MASKLINE|LUA_MASKCOUNT
| beqz AT, >1
|. nop
| b >1
|. sw TMP2, DISPATCH_GL(hookcount)(DISPATCH)
|.endif
|
|->vm_rethook: // Dispatch target for return hooks.
| lbu TMP3, DISPATCH_GL(hookmask)(DISPATCH)
| andi AT, TMP3, HOOK_ACTIVE // Hook already active?
| beqz AT, >1
|5: // Re-dispatch to static ins.
|. ld AT, GG_DISP2STATIC(TMP0) // Assumes TMP0 holds DISPATCH+OP*4.
| jr AT
|. nop
|
|->vm_inshook: // Dispatch target for instr/line hooks.
| lbu TMP3, DISPATCH_GL(hookmask)(DISPATCH)
| lw TMP2, DISPATCH_GL(hookcount)(DISPATCH)
| andi AT, TMP3, HOOK_ACTIVE // Hook already active?
| bnez AT, <5
|. andi AT, TMP3, LUA_MASKLINE|LUA_MASKCOUNT
| beqz AT, <5
|. addiu TMP2, TMP2, -1
| beqz TMP2, >1
|. sw TMP2, DISPATCH_GL(hookcount)(DISPATCH)
| andi AT, TMP3, LUA_MASKLINE
| beqz AT, <5
|1:
|. load_got lj_dispatch_ins
| sw MULTRES, SAVE_MULTRES
| move CARG2, PC
| sd BASE, L->base
| // SAVE_PC must hold the _previous_ PC. The callee updates it with PC.
| call_intern lj_dispatch_ins // (lua_State *L, const BCIns *pc)
|. move CARG1, L
|3:
| ld BASE, L->base
|4: // Re-dispatch to static ins.
| lw INS, -4(PC)
| decode_OP8a TMP1, INS
| decode_OP8b TMP1
| daddu TMP0, DISPATCH, TMP1
| decode_RD8a RD, INS
| ld AT, GG_DISP2STATIC(TMP0)
| decode_RA8a RA, INS
| decode_RD8b RD
| jr AT
| decode_RA8b RA
|
|->cont_hook: // Continue from hook yield.
| daddiu PC, PC, 4
| b <4
|. lw MULTRES, -24+LO(RB) // Restore MULTRES for *M ins.
|
|->vm_hotloop: // Hot loop counter underflow.
|.if JIT
| ld LFUNC:TMP1, FRAME_FUNC(BASE)
| daddiu CARG1, DISPATCH, GG_DISP2J
| cleartp LFUNC:TMP1
| sd PC, SAVE_PC
| ld TMP1, LFUNC:TMP1->pc
| move CARG2, PC
| sd L, DISPATCH_J(L)(DISPATCH)
| lbu TMP1, PC2PROTO(framesize)(TMP1)
| load_got lj_trace_hot
| sd BASE, L->base
| dsll TMP1, TMP1, 3
| daddu TMP1, BASE, TMP1
| call_intern lj_trace_hot // (jit_State *J, const BCIns *pc)
|. sd TMP1, L->top
| b <3
|. nop
|.endif
|
|
|->vm_callhook: // Dispatch target for call hooks.
|.if JIT
| b >1
|.endif
|. move CARG2, PC
|
|->vm_hotcall: // Hot call counter underflow.
|.if JIT
| ori CARG2, PC, 1
|1:
|.endif
| load_got lj_dispatch_call
| daddu TMP0, BASE, RC
| sd PC, SAVE_PC
| sd BASE, L->base
| dsubu RA, RA, BASE
| sd TMP0, L->top
| call_intern lj_dispatch_call // (lua_State *L, const BCIns *pc)
|. move CARG1, L
| // Returns ASMFunction.
| ld BASE, L->base
| ld TMP0, L->top
| sd r0, SAVE_PC // Invalidate for subsequent line hook.
| dsubu NARGS8:RC, TMP0, BASE
| daddu RA, BASE, RA
| ld LFUNC:RB, FRAME_FUNC(BASE)
| cleartp LFUNC:RB
| jr CRET1
|. lw INS, -4(PC)
|
|->cont_stitch: // Trace stitching.
|.if JIT
| // RA = resultptr, RB = meta base
| lw INS, -4(PC)
| ld TRACE:TMP2, -40(RB) // Save previous trace.
| decode_RA8a RC, INS
| daddiu AT, MULTRES, -8
| cleartp TRACE:TMP2
| decode_RA8b RC
| beqz AT, >2
|. daddu RC, BASE, RC // Call base.
|1: // Move results down.
| ld CARG1, 0(RA)
| daddiu AT, AT, -8
| daddiu RA, RA, 8
| sd CARG1, 0(RC)
| bnez AT, <1
|. daddiu RC, RC, 8
|2:
| decode_RA8a RA, INS
| decode_RB8a RB, INS
| decode_RA8b RA
| decode_RB8b RB
| daddu RA, RA, RB
| daddu RA, BASE, RA
|3:
| sltu AT, RC, RA
| bnez AT, >9 // More results wanted?
|. nop
|
| lhu TMP3, TRACE:TMP2->traceno
| lhu RD, TRACE:TMP2->link
| beq RD, TMP3, ->cont_nop // Blacklisted.
|. load_got lj_dispatch_stitch
| bnez RD, =>BC_JLOOP // Jump to stitched trace.
|. sll RD, RD, 3
|
| // Stitch a new trace to the previous trace.
| sw TMP3, DISPATCH_J(exitno)(DISPATCH)
| sd L, DISPATCH_J(L)(DISPATCH)
| sd BASE, L->base
| daddiu CARG1, DISPATCH, GG_DISP2J
| call_intern lj_dispatch_stitch // (jit_State *J, const BCIns *pc)
|. move CARG2, PC
| b ->cont_nop
|. ld BASE, L->base
|
|9:
| sd TISNIL, 0(RC)
| b <3
|. daddiu RC, RC, 8
|.endif
|
|->vm_profhook: // Dispatch target for profiler hook.
#if LJ_HASPROFILE
| load_got lj_dispatch_profile
| sw MULTRES, SAVE_MULTRES
| move CARG2, PC
| sd BASE, L->base
| call_intern lj_dispatch_profile // (lua_State *L, const BCIns *pc)
|. move CARG1, L
| // HOOK_PROFILE is off again, so re-dispatch to dynamic instruction.
| daddiu PC, PC, -4
| b ->cont_nop
|. ld BASE, L->base
#endif
|
|//-----------------------------------------------------------------------
|//-- Trace exit handler -------------------------------------------------
|//-----------------------------------------------------------------------
|
|.macro savex_, a, b
|.if FPU
| sdc1 f..a, a*8(sp)
| sdc1 f..b, b*8(sp)
| sd r..a, 32*8+a*8(sp)
| sd r..b, 32*8+b*8(sp)
|.else
| sd r..a, a*8(sp)
| sd r..b, b*8(sp)
|.endif
|.endmacro
|
|->vm_exit_handler:
|.if JIT
|.if FPU
| daddiu sp, sp, -(32*8+32*8)
|.else
| daddiu sp, sp, -(32*8)
|.endif
| savex_ 0, 1
| savex_ 2, 3
| savex_ 4, 5
| savex_ 6, 7
| savex_ 8, 9
| savex_ 10, 11
| savex_ 12, 13
| savex_ 14, 15
| savex_ 16, 17
| savex_ 18, 19
| savex_ 20, 21
| savex_ 22, 23
| savex_ 24, 25
| savex_ 26, 27
| savex_ 28, 30
|.if FPU
| sdc1 f29, 29*8(sp)
| sdc1 f31, 31*8(sp)
| sd r0, 32*8+31*8(sp) // Clear RID_TMP.
| daddiu TMP2, sp, 32*8+32*8 // Recompute original value of sp.
| sd TMP2, 32*8+29*8(sp) // Store sp in RID_SP
|.else
| sd r0, 31*8(sp) // Clear RID_TMP.
| daddiu TMP2, sp, 32*8 // Recompute original value of sp.
| sd TMP2, 29*8(sp) // Store sp in RID_SP
|.endif
| li_vmstate EXIT
| daddiu DISPATCH, JGL, -GG_DISP2G-32768
| lw TMP1, 0(TMP2) // Load exit number.
| st_vmstate
| ld L, DISPATCH_GL(cur_L)(DISPATCH)
| ld BASE, DISPATCH_GL(jit_base)(DISPATCH)
| load_got lj_trace_exit
| sd L, DISPATCH_J(L)(DISPATCH)
| sw ra, DISPATCH_J(parent)(DISPATCH) // Store trace number.
| sd BASE, L->base
| sw TMP1, DISPATCH_J(exitno)(DISPATCH) // Store exit number.
| daddiu CARG1, DISPATCH, GG_DISP2J
| sd r0, DISPATCH_GL(jit_base)(DISPATCH)
| call_intern lj_trace_exit // (jit_State *J, ExitState *ex)
|. move CARG2, sp
| // Returns MULTRES (unscaled) or negated error code.
| ld TMP1, L->cframe
| li AT, -4
| ld BASE, L->base
| and sp, TMP1, AT
| ld PC, SAVE_PC // Get SAVE_PC.
| b >1
|. sd L, SAVE_L // Set SAVE_L (on-trace resume/yield).
|.endif
|->vm_exit_interp:
|.if JIT
| // CRET1 = MULTRES or negated error code, BASE, PC and JGL set.
| ld L, SAVE_L
| daddiu DISPATCH, JGL, -GG_DISP2G-32768
| sd BASE, L->base
|1:
| bltz CRET1, >9 // Check for error from exit.
|. ld LFUNC:RB, FRAME_FUNC(BASE)
| .FPU lui TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float).
| dsll MULTRES, CRET1, 3
| cleartp LFUNC:RB
| sw MULTRES, SAVE_MULTRES
| li TISNIL, LJ_TNIL
| li TISNUM, LJ_TISNUM // Setup type comparison constants.
| .FPU mtc1 TMP3, TOBIT
| ld TMP1, LFUNC:RB->pc
| sd r0, DISPATCH_GL(jit_base)(DISPATCH)
| ld KBASE, PC2PROTO(k)(TMP1)
| .FPU cvt.d.s TOBIT, TOBIT
| // Modified copy of ins_next which handles function header dispatch, too.
| lw INS, 0(PC)
| daddiu PC, PC, 4
| // Assumes TISNIL == ~LJ_VMST_INTERP == -1
| sw TISNIL, DISPATCH_GL(vmstate)(DISPATCH)
| decode_OP8a TMP1, INS
| decode_OP8b TMP1
| sltiu TMP2, TMP1, BC_FUNCF*8
| daddu TMP0, DISPATCH, TMP1
| decode_RD8a RD, INS
| ld AT, 0(TMP0)
| decode_RA8a RA, INS
| beqz TMP2, >2
|. decode_RA8b RA
| jr AT
|. decode_RD8b RD
|2:
| sltiu TMP2, TMP1, (BC_FUNCC+2)*8 // Fast function?
| bnez TMP2, >3
|. ld TMP1, FRAME_PC(BASE)
| // Check frame below fast function.
| andi TMP0, TMP1, FRAME_TYPE
| bnez TMP0, >3 // Trace stitching continuation?
|. nop
| // Otherwise set KBASE for Lua function below fast function.
| lw TMP2, -4(TMP1)
| decode_RA8a TMP0, TMP2
| decode_RA8b TMP0
| dsubu TMP1, BASE, TMP0
| ld LFUNC:TMP2, -32(TMP1)
| cleartp LFUNC:TMP2
| ld TMP1, LFUNC:TMP2->pc
| ld KBASE, PC2PROTO(k)(TMP1)
|3:
| daddiu RC, MULTRES, -8
| jr AT
|. daddu RA, RA, BASE
|
|9: // Rethrow error from the right C frame.
| load_got lj_err_throw
| negu CARG2, CRET1
| call_intern lj_err_throw // (lua_State *L, int errcode)
|. move CARG1, L
|.endif
|
|//-----------------------------------------------------------------------
|//-- Math helper functions ----------------------------------------------
|//-----------------------------------------------------------------------
|
|// Hard-float round to integer.
|// Modifies AT, TMP0, FRET1, FRET2, f4. Keeps all others incl. FARG1.
|.macro vm_round_hf, func
| lui TMP0, 0x4330 // Hiword of 2^52 (double).
| dsll TMP0, TMP0, 32
| dmtc1 TMP0, f4
| abs.d FRET2, FARG1 // |x|
| dmfc1 AT, FARG1
| c.olt.d 0, FRET2, f4
| add.d FRET1, FRET2, f4 // (|x| + 2^52) - 2^52
| bc1f 0, >1 // Truncate only if |x| < 2^52.
|. sub.d FRET1, FRET1, f4
| slt AT, AT, r0
|.if "func" == "ceil"
| lui TMP0, 0xbff0 // Hiword of -1 (double). Preserves -0.
|.else
| lui TMP0, 0x3ff0 // Hiword of +1 (double).
|.endif
|.if "func" == "trunc"
| dsll TMP0, TMP0, 32
| dmtc1 TMP0, f4
| c.olt.d 0, FRET2, FRET1 // |x| < result?
| sub.d FRET2, FRET1, f4
| movt.d FRET1, FRET2, 0 // If yes, subtract +1.
| neg.d FRET2, FRET1
| jr ra
|. movn.d FRET1, FRET2, AT // Merge sign bit back in.
|.else
| neg.d FRET2, FRET1
| dsll TMP0, TMP0, 32
| dmtc1 TMP0, f4
| movn.d FRET1, FRET2, AT // Merge sign bit back in.
|.if "func" == "ceil"
| c.olt.d 0, FRET1, FARG1 // x > result?
|.else
| c.olt.d 0, FARG1, FRET1 // x < result?
|.endif
| sub.d FRET2, FRET1, f4 // If yes, subtract +-1.
| jr ra
|. movt.d FRET1, FRET2, 0
|.endif
|1:
| jr ra
|. mov.d FRET1, FARG1
|.endmacro
|
|.macro vm_round, func
|.if FPU
| vm_round_hf, func
|.endif
|.endmacro
|
|->vm_floor:
| vm_round floor
|->vm_ceil:
| vm_round ceil
|->vm_trunc:
|.if JIT
| vm_round trunc
|.endif
|
|// Soft-float integer to number conversion.
|.macro sfi2d, ARG
|.if not FPU
| beqz ARG, >9 // Handle zero first.
|. sra TMP0, ARG, 31
| xor TMP1, ARG, TMP0
| dsubu TMP1, TMP1, TMP0 // Absolute value in TMP1.
| dclz ARG, TMP1
| addiu ARG, ARG, -11
| li AT, 0x3ff+63-11-1
| dsllv TMP1, TMP1, ARG // Align mantissa left with leading 1.
| subu ARG, AT, ARG // Exponent - 1.
| ins ARG, TMP0, 11, 11 // Sign | Exponent.
| dsll ARG, ARG, 52 // Align left.
| jr ra
|. daddu ARG, ARG, TMP1 // Add mantissa, increment exponent.
|9:
| jr ra
|. nop
|.endif
|.endmacro
|
|// Input CARG1. Output: CARG1. Temporaries: AT, TMP0, TMP1.
|->vm_sfi2d_1:
| sfi2d CARG1
|
|// Input CARG2. Output: CARG2. Temporaries: AT, TMP0, TMP1.
|->vm_sfi2d_2:
| sfi2d CARG2
|
|// Soft-float comparison. Equivalent to c.eq.d.
|// Input: CARG*. Output: CRET1. Temporaries: AT, TMP0, TMP1.
|->vm_sfcmpeq:
|.if not FPU
| dsll AT, CARG1, 1
| dsll TMP0, CARG2, 1
| or TMP1, AT, TMP0
| beqz TMP1, >8 // Both args +-0: return 1.
|. lui TMP1, 0xffe0
| dsll TMP1, TMP1, 32
| sltu AT, TMP1, AT
| sltu TMP0, TMP1, TMP0
| or TMP1, AT, TMP0
| bnez TMP1, >9 // Either arg is NaN: return 0;
|. xor AT, CARG1, CARG2
| jr ra
|. sltiu CRET1, AT, 1 // Same values: return 1.
|8:
| jr ra
|. li CRET1, 1
|9:
| jr ra
|. li CRET1, 0
|.endif
|
|// Soft-float comparison. Equivalent to c.ult.d and c.olt.d.
|// Input: CARG1, CARG2. Output: CRET1. Temporaries: AT, TMP0, TMP1, CRET2.
|->vm_sfcmpult:
|.if not FPU
| b >1
|. li CRET2, 1
|.endif
|
|->vm_sfcmpolt:
|.if not FPU
| li CRET2, 0
|1:
| dsll AT, CARG1, 1
| dsll TMP0, CARG2, 1
| or TMP1, AT, TMP0
| beqz TMP1, >8 // Both args +-0: return 0.
|. lui TMP1, 0xffe0
| dsll TMP1, TMP1, 32
| sltu AT, TMP1, AT
| sltu TMP0, TMP1, TMP0
| or TMP1, AT, TMP0
| bnez TMP1, >9 // Either arg is NaN: return 0 or 1;
|. and AT, CARG1, CARG2
| bltz AT, >5 // Both args negative?
|. nop
| jr ra
|. slt CRET1, CARG1, CARG2
|5: // Swap conditions if both operands are negative.
| jr ra
|. slt CRET1, CARG2, CARG1
|8:
| jr ra
|. li CRET1, 0
|9:
| jr ra
|. move CRET1, CRET2
|.endif
|
|// Soft-float comparison. Equivalent to c.ole.d a, b or c.ole.d b, a.
|// Input: CARG1, CARG2, TMP3. Output: CRET1. Temporaries: AT, TMP0, TMP1.
|->vm_sfcmpolex:
|.if not FPU
| dsll AT, CARG1, 1
| dsll TMP0, CARG2, 1
| or TMP1, AT, TMP0
| beqz TMP1, >8 // Both args +-0: return 1.
|. lui TMP1, 0xffe0
| dsll TMP1, TMP1, 32
| sltu AT, TMP1, AT
| sltu TMP0, TMP1, TMP0
| or TMP1, AT, TMP0
| bnez TMP1, >9 // Either arg is NaN: return 0;
|. and AT, CARG1, CARG2
| xor AT, AT, TMP3
| bltz AT, >5 // Both args negative?
|. nop
| jr ra
|. slt CRET1, CARG2, CARG1
|5: // Swap conditions if both operands are negative.
| jr ra
|. slt CRET1, CARG1, CARG2
|8:
| jr ra
|. li CRET1, 1
|9:
| jr ra
|. li CRET1, 0
|.endif
|
|.macro sfmin_max, name, intins
|->vm_sf .. name:
|.if JIT and not FPU
| move TMP2, ra
| bal ->vm_sfcmpolt
|. nop
| move ra, TMP2
| move TMP0, CRET1
| move CRET1, CARG1
| jr ra
|. intins CRET1, CARG2, TMP0
|.endif
|.endmacro
|
| sfmin_max min, movz
| sfmin_max max, movn
|
|//-----------------------------------------------------------------------
|//-- Miscellaneous functions --------------------------------------------
|//-----------------------------------------------------------------------
|
|//-----------------------------------------------------------------------
|//-- FFI helper functions -----------------------------------------------
|//-----------------------------------------------------------------------
|
|// Handler for callback functions. Callback slot number in r1, g in r2.
|->vm_ffi_callback:
|.if FFI
|.type CTSTATE, CTState, PC
| saveregs
| ld CTSTATE, GL:r2->ctype_state
| daddiu DISPATCH, r2, GG_G2DISP
| load_got lj_ccallback_enter
| sw r1, CTSTATE->cb.slot
| sd CARG1, CTSTATE->cb.gpr[0]
| .FPU sdc1 FARG1, CTSTATE->cb.fpr[0]
| sd CARG2, CTSTATE->cb.gpr[1]
| .FPU sdc1 FARG2, CTSTATE->cb.fpr[1]
| sd CARG3, CTSTATE->cb.gpr[2]
| .FPU sdc1 FARG3, CTSTATE->cb.fpr[2]
| sd CARG4, CTSTATE->cb.gpr[3]
| .FPU sdc1 FARG4, CTSTATE->cb.fpr[3]
| sd CARG5, CTSTATE->cb.gpr[4]
| .FPU sdc1 FARG5, CTSTATE->cb.fpr[4]
| sd CARG6, CTSTATE->cb.gpr[5]
| .FPU sdc1 FARG6, CTSTATE->cb.fpr[5]
| sd CARG7, CTSTATE->cb.gpr[6]
| .FPU sdc1 FARG7, CTSTATE->cb.fpr[6]
| sd CARG8, CTSTATE->cb.gpr[7]
| .FPU sdc1 FARG8, CTSTATE->cb.fpr[7]
| daddiu TMP0, sp, CFRAME_SPACE
| sd TMP0, CTSTATE->cb.stack
| sd r0, SAVE_PC // Any value outside of bytecode is ok.
| move CARG2, sp
| call_intern lj_ccallback_enter // (CTState *cts, void *cf)
|. move CARG1, CTSTATE
| // Returns lua_State *.
| ld BASE, L:CRET1->base
| ld RC, L:CRET1->top
| move L, CRET1
| .FPU lui TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float).
| ld LFUNC:RB, FRAME_FUNC(BASE)
| .FPU mtc1 TMP3, TOBIT
| li TISNIL, LJ_TNIL
| li TISNUM, LJ_TISNUM
| li_vmstate INTERP
| subu RC, RC, BASE
| cleartp LFUNC:RB
| st_vmstate
| .FPU cvt.d.s TOBIT, TOBIT
| ins_callt
|.endif
|
|->cont_ffi_callback: // Return from FFI callback.
|.if FFI
| load_got lj_ccallback_leave
| ld CTSTATE, DISPATCH_GL(ctype_state)(DISPATCH)
| sd BASE, L->base
| sd RB, L->top
| sd L, CTSTATE->L
| move CARG2, RA
| call_intern lj_ccallback_leave // (CTState *cts, TValue *o)
|. move CARG1, CTSTATE
| .FPU ldc1 FRET1, CTSTATE->cb.fpr[0]
| ld CRET1, CTSTATE->cb.gpr[0]
| .FPU ldc1 FRET2, CTSTATE->cb.fpr[1]
| b ->vm_leave_unw
|. ld CRET2, CTSTATE->cb.gpr[1]
|.endif
|
|->vm_ffi_call: // Call C function via FFI.
| // Caveat: needs special frame unwinding, see below.
|.if FFI
| .type CCSTATE, CCallState, CARG1
| lw TMP1, CCSTATE->spadj
| lbu CARG2, CCSTATE->nsp
| move TMP2, sp
| dsubu sp, sp, TMP1
| sd ra, -8(TMP2)
| sll CARG2, CARG2, 3
| sd r16, -16(TMP2)
| sd CCSTATE, -24(TMP2)
| move r16, TMP2
| daddiu TMP1, CCSTATE, offsetof(CCallState, stack)
| move TMP2, sp
| beqz CARG2, >2
|. daddu TMP3, TMP1, CARG2
|1:
| ld TMP0, 0(TMP1)
| daddiu TMP1, TMP1, 8
| sltu AT, TMP1, TMP3
| sd TMP0, 0(TMP2)
| bnez AT, <1
|. daddiu TMP2, TMP2, 8
|2:
| ld CFUNCADDR, CCSTATE->func
| .FPU ldc1 FARG1, CCSTATE->gpr[0]
| ld CARG2, CCSTATE->gpr[1]
| .FPU ldc1 FARG2, CCSTATE->gpr[1]
| ld CARG3, CCSTATE->gpr[2]
| .FPU ldc1 FARG3, CCSTATE->gpr[2]
| ld CARG4, CCSTATE->gpr[3]
| .FPU ldc1 FARG4, CCSTATE->gpr[3]
| ld CARG5, CCSTATE->gpr[4]
| .FPU ldc1 FARG5, CCSTATE->gpr[4]
| ld CARG6, CCSTATE->gpr[5]
| .FPU ldc1 FARG6, CCSTATE->gpr[5]
| ld CARG7, CCSTATE->gpr[6]
| .FPU ldc1 FARG7, CCSTATE->gpr[6]
| ld CARG8, CCSTATE->gpr[7]
| .FPU ldc1 FARG8, CCSTATE->gpr[7]
| jalr CFUNCADDR
|. ld CARG1, CCSTATE->gpr[0] // Do this last, since CCSTATE is CARG1.
| ld CCSTATE:TMP1, -24(r16)
| ld TMP2, -16(r16)
| ld ra, -8(r16)
| sd CRET1, CCSTATE:TMP1->gpr[0]
| sd CRET2, CCSTATE:TMP1->gpr[1]
|.if FPU
| sdc1 FRET1, CCSTATE:TMP1->fpr[0]
| sdc1 FRET2, CCSTATE:TMP1->fpr[1]
|.else
| sd CARG1, CCSTATE:TMP1->gpr[2] // 2nd FP struct field for soft-float.
|.endif
| move sp, r16
| jr ra
|. move r16, TMP2
|.endif
|// Note: vm_ffi_call must be the last function in this object file!
|
|//-----------------------------------------------------------------------
}
/* Generate the code for a single instruction. */
static void build_ins(BuildCtx *ctx, BCOp op, int defop)
{
int vk = 0;
|=>defop:
switch (op) {
/* -- Comparison ops ---------------------------------------------------- */
/* Remember: all ops branch for a true comparison, fall through otherwise. */
case BC_ISLT: case BC_ISGE: case BC_ISLE: case BC_ISGT:
| // RA = src1*8, RD = src2*8, JMP with RD = target
|.macro bc_comp, FRA, FRD, ARGRA, ARGRD, movop, fmovop, fcomp, sfcomp
| daddu RA, BASE, RA
| daddu RD, BASE, RD
| ld ARGRA, 0(RA)
| ld ARGRD, 0(RD)
| lhu TMP2, OFS_RD(PC)
| gettp CARG3, ARGRA
| gettp CARG4, ARGRD
| bne CARG3, TISNUM, >2
|. daddiu PC, PC, 4
| bne CARG4, TISNUM, >5
|. decode_RD4b TMP2
| sextw ARGRA, ARGRA
| sextw ARGRD, ARGRD
| lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535)
| slt AT, CARG1, CARG2
| addu TMP2, TMP2, TMP3
| movop TMP2, r0, AT
|1:
| daddu PC, PC, TMP2
| ins_next
|
|2: // RA is not an integer.
| sltiu AT, CARG3, LJ_TISNUM
| beqz AT, ->vmeta_comp
|. lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535)
| sltiu AT, CARG4, LJ_TISNUM
| beqz AT, >4
|. decode_RD4b TMP2
|.if FPU
| ldc1 FRA, 0(RA)
| ldc1 FRD, 0(RD)
|.endif
|3: // RA and RD are both numbers.
|.if FPU
| fcomp f20, f22
| addu TMP2, TMP2, TMP3
| b <1
|. fmovop TMP2, r0
|.else
| bal sfcomp
|. addu TMP2, TMP2, TMP3
| b <1
|. movop TMP2, r0, CRET1
|.endif
|
|4: // RA is a number, RD is not a number.
| bne CARG4, TISNUM, ->vmeta_comp
| // RA is a number, RD is an integer. Convert RD to a number.
|.if FPU
|. lwc1 FRD, LO(RD)
| ldc1 FRA, 0(RA)
| b <3
|. cvt.d.w FRD, FRD
|.else
|.if "ARGRD" == "CARG1"
|. sextw CARG1, CARG1
| bal ->vm_sfi2d_1
|. nop
|.else
|. sextw CARG2, CARG2
| bal ->vm_sfi2d_2
|. nop
|.endif
| b <3
|. nop
|.endif
|
|5: // RA is an integer, RD is not an integer
| sltiu AT, CARG4, LJ_TISNUM
| beqz AT, ->vmeta_comp
|. lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535)
| // RA is an integer, RD is a number. Convert RA to a number.
|.if FPU
| lwc1 FRA, LO(RA)
| ldc1 FRD, 0(RD)
| b <3
| cvt.d.w FRA, FRA
|.else
|.if "ARGRA" == "CARG1"
| bal ->vm_sfi2d_1
|. sextw CARG1, CARG1
|.else
| bal ->vm_sfi2d_2
|. sextw CARG2, CARG2
|.endif
| b <3
|. nop
|.endif
|.endmacro
|
if (op == BC_ISLT) {
| bc_comp f20, f22, CARG1, CARG2, movz, movf, c.olt.d, ->vm_sfcmpolt
} else if (op == BC_ISGE) {
| bc_comp f20, f22, CARG1, CARG2, movn, movt, c.olt.d, ->vm_sfcmpolt
} else if (op == BC_ISLE) {
| bc_comp f22, f20, CARG2, CARG1, movn, movt, c.ult.d, ->vm_sfcmpult
} else {
| bc_comp f22, f20, CARG2, CARG1, movz, movf, c.ult.d, ->vm_sfcmpult
}
break;
case BC_ISEQV: case BC_ISNEV:
vk = op == BC_ISEQV;
| // RA = src1*8, RD = src2*8, JMP with RD = target
| daddu RA, BASE, RA
| daddiu PC, PC, 4
| daddu RD, BASE, RD
| ld CARG1, 0(RA)
| lhu TMP2, -4+OFS_RD(PC)
| ld CARG2, 0(RD)
| gettp CARG3, CARG1
| gettp CARG4, CARG2
| sltu AT, TISNUM, CARG3
| sltu TMP1, TISNUM, CARG4
| or AT, AT, TMP1
if (vk) {
| beqz AT, ->BC_ISEQN_Z
} else {
| beqz AT, ->BC_ISNEN_Z
}
| // Either or both types are not numbers.
| lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535)
|.if FFI
|. li AT, LJ_TCDATA
| beq CARG3, AT, ->vmeta_equal_cd
|.endif
| decode_RD4b TMP2
|.if FFI
| beq CARG4, AT, ->vmeta_equal_cd
|. nop
|.endif
| bne CARG1, CARG2, >2
|. addu TMP2, TMP2, TMP3
| // Tag and value are equal.
if (vk) {
|->BC_ISEQV_Z:
| daddu PC, PC, TMP2
}
|1:
| ins_next
|
|2: // Check if the tags are the same and it's a table or userdata.
| xor AT, CARG3, CARG4 // Same type?
| sltiu TMP0, CARG3, LJ_TISTABUD+1 // Table or userdata?
| movn TMP0, r0, AT
if (vk) {
| beqz TMP0, <1
} else {
| beqz TMP0, ->BC_ISEQV_Z // Reuse code from opposite instruction.
}
| // Different tables or userdatas. Need to check __eq metamethod.
| // Field metatable must be at same offset for GCtab and GCudata!
|. cleartp TAB:TMP1, CARG1
| ld TAB:TMP3, TAB:TMP1->metatable
if (vk) {
| beqz TAB:TMP3, <1 // No metatable?
|. nop
| lbu TMP3, TAB:TMP3->nomm
| andi TMP3, TMP3, 1<<MM_eq
| bnez TMP3, >1 // Or 'no __eq' flag set?
} else {
| beqz TAB:TMP3,->BC_ISEQV_Z // No metatable?
|. nop
| lbu TMP3, TAB:TMP3->nomm
| andi TMP3, TMP3, 1<<MM_eq
| bnez TMP3, ->BC_ISEQV_Z // Or 'no __eq' flag set?
}
|. nop
| b ->vmeta_equal // Handle __eq metamethod.
|. li TMP0, 1-vk // ne = 0 or 1.
break;
case BC_ISEQS: case BC_ISNES:
vk = op == BC_ISEQS;
| // RA = src*8, RD = str_const*8 (~), JMP with RD = target
| daddu RA, BASE, RA
| daddiu PC, PC, 4
| ld CARG1, 0(RA)
| dsubu RD, KBASE, RD
| lhu TMP2, -4+OFS_RD(PC)
| ld CARG2, -8(RD) // KBASE-8-str_const*8
|.if FFI
| gettp TMP0, CARG1
| li AT, LJ_TCDATA
|.endif
| li TMP1, LJ_TSTR
| decode_RD4b TMP2
|.if FFI
| beq TMP0, AT, ->vmeta_equal_cd
|.endif
|. settp CARG2, TMP1
| lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535)
| xor TMP1, CARG1, CARG2
| addu TMP2, TMP2, TMP3
if (vk) {
| movn TMP2, r0, TMP1
} else {
| movz TMP2, r0, TMP1
}
| daddu PC, PC, TMP2
| ins_next
break;
case BC_ISEQN: case BC_ISNEN:
vk = op == BC_ISEQN;
| // RA = src*8, RD = num_const*8, JMP with RD = target
| daddu RA, BASE, RA
| daddu RD, KBASE, RD
| ld CARG1, 0(RA)
| ld CARG2, 0(RD)
| lhu TMP2, OFS_RD(PC)
| gettp CARG3, CARG1
| gettp CARG4, CARG2
| daddiu PC, PC, 4
| lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535)
if (vk) {
|->BC_ISEQN_Z:
} else {
|->BC_ISNEN_Z:
}
| bne CARG3, TISNUM, >3
|. decode_RD4b TMP2
| bne CARG4, TISNUM, >6
|. addu TMP2, TMP2, TMP3
| xor AT, CARG1, CARG2
if (vk) {
| movn TMP2, r0, AT
|1:
| daddu PC, PC, TMP2
|2:
} else {
| movz TMP2, r0, AT
|1:
|2:
| daddu PC, PC, TMP2
}
| ins_next
|
|3: // RA is not an integer.
| sltu AT, CARG3, TISNUM
|.if FFI
| beqz AT, >8
|.else
| beqz AT, <2
|.endif
|. addu TMP2, TMP2, TMP3
| sltu AT, CARG4, TISNUM
|.if FPU
| ldc1 f20, 0(RA)
| ldc1 f22, 0(RD)
|.endif
| beqz AT, >5
|. nop
|4: // RA and RD are both numbers.
|.if FPU
| c.eq.d f20, f22
| b <1
if (vk) {
|. movf TMP2, r0
} else {
|. movt TMP2, r0
}
|.else
| bal ->vm_sfcmpeq
|. nop
| b <1
if (vk) {
|. movz TMP2, r0, CRET1
} else {
|. movn TMP2, r0, CRET1
}
|.endif
|
|5: // RA is a number, RD is not a number.
|.if FFI
| bne CARG4, TISNUM, >9
|.else
| bne CARG4, TISNUM, <2
|.endif
| // RA is a number, RD is an integer. Convert RD to a number.
|.if FPU
|. lwc1 f22, LO(RD)
| b <4
|. cvt.d.w f22, f22
|.else
|. sextw CARG2, CARG2
| bal ->vm_sfi2d_2
|. nop
| b <4
|. nop
|.endif
|
|6: // RA is an integer, RD is not an integer
| sltu AT, CARG4, TISNUM
|.if FFI
| beqz AT, >9
|.else
| beqz AT, <2
|.endif
| // RA is an integer, RD is a number. Convert RA to a number.
|.if FPU
|. lwc1 f20, LO(RA)
| ldc1 f22, 0(RD)
| b <4
| cvt.d.w f20, f20
|.else
|. sextw CARG1, CARG1
| bal ->vm_sfi2d_1
|. nop
| b <4
|. nop
|.endif
|
|.if FFI
|8:
| li AT, LJ_TCDATA
| bne CARG3, AT, <2
|. nop
| b ->vmeta_equal_cd
|. nop
|9:
| li AT, LJ_TCDATA
| bne CARG4, AT, <2
|. nop
| b ->vmeta_equal_cd
|. nop
|.endif
break;
case BC_ISEQP: case BC_ISNEP:
vk = op == BC_ISEQP;
| // RA = src*8, RD = primitive_type*8 (~), JMP with RD = target
| daddu RA, BASE, RA
| srl TMP1, RD, 3
| ld TMP0, 0(RA)
| lhu TMP2, OFS_RD(PC)
| not TMP1, TMP1
| gettp TMP0, TMP0
| daddiu PC, PC, 4
|.if FFI
| li AT, LJ_TCDATA
| beq TMP0, AT, ->vmeta_equal_cd
|.endif
|. xor TMP0, TMP0, TMP1
| decode_RD4b TMP2
| lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535)
| addu TMP2, TMP2, TMP3
if (vk) {
| movn TMP2, r0, TMP0
} else {
| movz TMP2, r0, TMP0
}
| daddu PC, PC, TMP2
| ins_next
break;
/* -- Unary test and copy ops ------------------------------------------- */
case BC_ISTC: case BC_ISFC: case BC_IST: case BC_ISF:
| // RA = dst*8 or unused, RD = src*8, JMP with RD = target
| daddu RD, BASE, RD
| lhu TMP2, OFS_RD(PC)
| ld TMP0, 0(RD)
| daddiu PC, PC, 4
| gettp TMP0, TMP0
| sltiu TMP0, TMP0, LJ_TISTRUECOND
if (op == BC_IST || op == BC_ISF) {
| decode_RD4b TMP2
| lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535)
| addu TMP2, TMP2, TMP3
if (op == BC_IST) {
| movz TMP2, r0, TMP0
} else {
| movn TMP2, r0, TMP0
}
| daddu PC, PC, TMP2
} else {
| ld CRET1, 0(RD)
if (op == BC_ISTC) {
| beqz TMP0, >1
} else {
| bnez TMP0, >1
}
|. daddu RA, BASE, RA
| decode_RD4b TMP2
| lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535)
| addu TMP2, TMP2, TMP3
| sd CRET1, 0(RA)
| daddu PC, PC, TMP2
|1:
}
| ins_next
break;
case BC_ISTYPE:
| // RA = src*8, RD = -type*8
| daddu TMP2, BASE, RA
| srl TMP1, RD, 3
| ld TMP0, 0(TMP2)
| ins_next1
| gettp TMP0, TMP0
| daddu AT, TMP0, TMP1
| bnez AT, ->vmeta_istype
|. ins_next2
break;
case BC_ISNUM:
| // RA = src*8, RD = -(TISNUM-1)*8
| daddu TMP2, BASE, RA
| ld TMP0, 0(TMP2)
| ins_next1
| checknum TMP0, ->vmeta_istype
|. ins_next2
break;
/* -- Unary ops --------------------------------------------------------- */
case BC_MOV:
| // RA = dst*8, RD = src*8
| daddu RD, BASE, RD
| daddu RA, BASE, RA
| ld CRET1, 0(RD)
| ins_next1
| sd CRET1, 0(RA)
| ins_next2
break;
case BC_NOT:
| // RA = dst*8, RD = src*8
| daddu RD, BASE, RD
| daddu RA, BASE, RA
| ld TMP0, 0(RD)
| li AT, LJ_TTRUE
| gettp TMP0, TMP0
| sltu TMP0, AT, TMP0
| addiu TMP0, TMP0, 1
| dsll TMP0, TMP0, 47
| not TMP0, TMP0
| ins_next1
| sd TMP0, 0(RA)
| ins_next2
break;
case BC_UNM:
| // RA = dst*8, RD = src*8
| daddu RB, BASE, RD
| ld CARG1, 0(RB)
| daddu RA, BASE, RA
| gettp CARG3, CARG1
| bne CARG3, TISNUM, >2
|. lui TMP1, 0x8000
| sextw CARG1, CARG1
| beq CARG1, TMP1, ->vmeta_unm // Meta handler deals with -2^31.
|. negu CARG1, CARG1
| zextw CARG1, CARG1
| settp CARG1, TISNUM
|1:
| ins_next1
| sd CARG1, 0(RA)
| ins_next2
|2:
| sltiu AT, CARG3, LJ_TISNUM
| beqz AT, ->vmeta_unm
|. dsll TMP1, TMP1, 32
| b <1
|. xor CARG1, CARG1, TMP1
break;
case BC_LEN:
| // RA = dst*8, RD = src*8
| daddu CARG2, BASE, RD
| daddu RA, BASE, RA
| ld TMP0, 0(CARG2)
| gettp TMP1, TMP0
| daddiu AT, TMP1, -LJ_TSTR
| bnez AT, >2
|. cleartp STR:CARG1, TMP0
| lw CRET1, STR:CARG1->len
|1:
| settp CRET1, TISNUM
| ins_next1
| sd CRET1, 0(RA)
| ins_next2
|2:
| daddiu AT, TMP1, -LJ_TTAB
| bnez AT, ->vmeta_len
|. nop
#if LJ_52
| ld TAB:TMP2, TAB:CARG1->metatable
| bnez TAB:TMP2, >9
|. nop
|3:
#endif
|->BC_LEN_Z:
| load_got lj_tab_len
| call_intern lj_tab_len // (GCtab *t)
|. nop
| // Returns uint32_t (but less than 2^31).
| b <1
|. nop
#if LJ_52
|9:
| lbu TMP0, TAB:TMP2->nomm
| andi TMP0, TMP0, 1<<MM_len
| bnez TMP0, <3 // 'no __len' flag set: done.
|. nop
| b ->vmeta_len
|. nop
#endif
break;
/* -- Binary ops -------------------------------------------------------- */
|.macro fpmod, a, b, c
| bal ->vm_floor // floor(b/c)
|. div.d FARG1, b, c
| mul.d a, FRET1, c
| sub.d a, b, a // b - floor(b/c)*c
|.endmacro
|.macro sfpmod
| daddiu sp, sp, -16
|
| load_got __divdf3
| sd CARG1, 0(sp)
| call_extern
|. sd CARG2, 8(sp)
|
| load_got floor
| call_extern
|. move CARG1, CRET1
|
| load_got __muldf3
| move CARG1, CRET1
| call_extern
|. ld CARG2, 8(sp)
|
| load_got __subdf3
| ld CARG1, 0(sp)
| call_extern
|. move CARG2, CRET1
|
| daddiu sp, sp, 16
|.endmacro
|.macro ins_arithpre, label
||vk = ((int)op - BC_ADDVN) / (BC_ADDNV-BC_ADDVN);
| // RA = dst*8, RB = src1*8, RC = src2*8 | num_const*8
||switch (vk) {
||case 0:
| decode_RB8a RB, INS
| decode_RB8b RB
| decode_RDtoRC8 RC, RD
| // RA = dst*8, RB = src1*8, RC = num_const*8
| daddu RB, BASE, RB
|.if "label" ~= "none"
| b label
|.endif
|. daddu RC, KBASE, RC
|| break;
||case 1:
| decode_RB8a RC, INS
| decode_RB8b RC
| decode_RDtoRC8 RB, RD
| // RA = dst*8, RB = num_const*8, RC = src1*8
| daddu RC, BASE, RC
|.if "label" ~= "none"
| b label
|.endif
|. daddu RB, KBASE, RB
|| break;
||default:
| decode_RB8a RB, INS
| decode_RB8b RB
| decode_RDtoRC8 RC, RD
| // RA = dst*8, RB = src1*8, RC = src2*8
| daddu RB, BASE, RB
|.if "label" ~= "none"
| b label
|.endif
|. daddu RC, BASE, RC
|| break;
||}
|.endmacro
|
|.macro ins_arith, intins, fpins, fpcall, label
| ins_arithpre none
|
|.if "label" ~= "none"
|label:
|.endif
|
|// Used in 5.
| ld CARG1, 0(RB)
| ld CARG2, 0(RC)
| gettp TMP0, CARG1
| gettp TMP1, CARG2
|
|.if "intins" ~= "div"
|
| // Check for two integers.
| sextw CARG3, CARG1
| bne TMP0, TISNUM, >5
|. sextw CARG4, CARG2
| bne TMP1, TISNUM, >5
|
|.if "intins" == "addu"
|. intins CRET1, CARG3, CARG4
| xor TMP1, CRET1, CARG3 // ((y^a) & (y^b)) < 0: overflow.
| xor TMP2, CRET1, CARG4
| and TMP1, TMP1, TMP2
| bltz TMP1, ->vmeta_arith
|. daddu RA, BASE, RA
|.elif "intins" == "subu"
|. intins CRET1, CARG3, CARG4
| xor TMP1, CRET1, CARG3 // ((y^a) & (a^b)) < 0: overflow.
| xor TMP2, CARG3, CARG4
| and TMP1, TMP1, TMP2
| bltz TMP1, ->vmeta_arith
|. daddu RA, BASE, RA
|.elif "intins" == "mult"
|. intins CARG3, CARG4
| mflo CRET1
| mfhi TMP2
| sra TMP1, CRET1, 31
| bne TMP1, TMP2, ->vmeta_arith
|. daddu RA, BASE, RA
|.else
|. load_got lj_vm_modi
| beqz CARG4, ->vmeta_arith
|. daddu RA, BASE, RA
| move CARG1, CARG3
| call_extern
|. move CARG2, CARG4
|.endif
|
| zextw CRET1, CRET1
| settp CRET1, TISNUM
| ins_next1
| sd CRET1, 0(RA)
|3:
| ins_next2
|
|.endif
|
|5: // Check for two numbers.
| .FPU ldc1 f20, 0(RB)
| sltu AT, TMP0, TISNUM
| sltu TMP0, TMP1, TISNUM
| .FPU ldc1 f22, 0(RC)
| and AT, AT, TMP0
| beqz AT, ->vmeta_arith
|. daddu RA, BASE, RA
|
|.if FPU
| fpins FRET1, f20, f22
|.elif "fpcall" == "sfpmod"
| sfpmod
|.else
| load_got fpcall
| call_extern
|. nop
|.endif
|
| ins_next1
|.if "intins" ~= "div"
| b <3
|.endif
|.if FPU
|. sdc1 FRET1, 0(RA)
|.else
|. sd CRET1, 0(RA)
|.endif
|.if "intins" == "div"
| ins_next2
|.endif
|
|.endmacro
case BC_ADDVN: case BC_ADDNV: case BC_ADDVV:
| ins_arith addu, add.d, __adddf3, none
break;
case BC_SUBVN: case BC_SUBNV: case BC_SUBVV:
| ins_arith subu, sub.d, __subdf3, none
break;
case BC_MULVN: case BC_MULNV: case BC_MULVV:
| ins_arith mult, mul.d, __muldf3, none
break;
case BC_DIVVN:
| ins_arith div, div.d, __divdf3, ->BC_DIVVN_Z
break;
case BC_DIVNV: case BC_DIVVV:
| ins_arithpre ->BC_DIVVN_Z
break;
case BC_MODVN:
| ins_arith modi, fpmod, sfpmod, ->BC_MODVN_Z
break;
case BC_MODNV: case BC_MODVV:
| ins_arithpre ->BC_MODVN_Z
break;
case BC_POW:
| ins_arithpre none
| ld CARG1, 0(RB)
| ld CARG2, 0(RC)
| gettp TMP0, CARG1
| gettp TMP1, CARG2
| sltiu TMP0, TMP0, LJ_TISNUM
| sltiu TMP1, TMP1, LJ_TISNUM
| and AT, TMP0, TMP1
| load_got pow
| beqz AT, ->vmeta_arith
|. daddu RA, BASE, RA
|.if FPU
| ldc1 FARG1, 0(RB)
| ldc1 FARG2, 0(RC)
|.endif
| call_extern
|. nop
| ins_next1
|.if FPU
| sdc1 FRET1, 0(RA)
|.else
| sd CRET1, 0(RA)
|.endif
| ins_next2
break;
case BC_CAT:
| // RA = dst*8, RB = src_start*8, RC = src_end*8
| decode_RB8a RB, INS
| decode_RB8b RB
| decode_RDtoRC8 RC, RD
| dsubu CARG3, RC, RB
| sd BASE, L->base
| daddu CARG2, BASE, RC
| move MULTRES, RB
|->BC_CAT_Z:
| load_got lj_meta_cat
| srl CARG3, CARG3, 3
| sd PC, SAVE_PC
| call_intern lj_meta_cat // (lua_State *L, TValue *top, int left)
|. move CARG1, L
| // Returns NULL (finished) or TValue * (metamethod).
| bnez CRET1, ->vmeta_binop
|. ld BASE, L->base
| daddu RB, BASE, MULTRES
| ld CRET1, 0(RB)
| daddu RA, BASE, RA
| ins_next1
| sd CRET1, 0(RA)
| ins_next2
break;
/* -- Constant ops ------------------------------------------------------ */
case BC_KSTR:
| // RA = dst*8, RD = str_const*8 (~)
| dsubu TMP1, KBASE, RD
| ins_next1
| li TMP2, LJ_TSTR
| ld TMP0, -8(TMP1) // KBASE-8-str_const*8
| daddu RA, BASE, RA
| settp TMP0, TMP2
| sd TMP0, 0(RA)
| ins_next2
break;
case BC_KCDATA:
|.if FFI
| // RA = dst*8, RD = cdata_const*8 (~)
| dsubu TMP1, KBASE, RD
| ins_next1
| ld TMP0, -8(TMP1) // KBASE-8-cdata_const*8
| li TMP2, LJ_TCDATA
| daddu RA, BASE, RA
| settp TMP0, TMP2
| sd TMP0, 0(RA)
| ins_next2
|.endif
break;
case BC_KSHORT:
| // RA = dst*8, RD = int16_literal*8
| sra RD, INS, 16
| daddu RA, BASE, RA
| zextw RD, RD
| ins_next1
| settp RD, TISNUM
| sd RD, 0(RA)
| ins_next2
break;
case BC_KNUM:
| // RA = dst*8, RD = num_const*8
| daddu RD, KBASE, RD
| daddu RA, BASE, RA
| ld CRET1, 0(RD)
| ins_next1
| sd CRET1, 0(RA)
| ins_next2
break;
case BC_KPRI:
| // RA = dst*8, RD = primitive_type*8 (~)
| daddu RA, BASE, RA
| dsll TMP0, RD, 44
| not TMP0, TMP0
| ins_next1
| sd TMP0, 0(RA)
| ins_next2
break;
case BC_KNIL:
| // RA = base*8, RD = end*8
| daddu RA, BASE, RA
| sd TISNIL, 0(RA)
| daddiu RA, RA, 8
| daddu RD, BASE, RD
|1:
| sd TISNIL, 0(RA)
| slt AT, RA, RD
| bnez AT, <1
|. daddiu RA, RA, 8
| ins_next_
break;
/* -- Upvalue and function ops ------------------------------------------ */
case BC_UGET:
| // RA = dst*8, RD = uvnum*8
| ld LFUNC:RB, FRAME_FUNC(BASE)
| daddu RA, BASE, RA
| cleartp LFUNC:RB
| daddu RD, RD, LFUNC:RB
| ld UPVAL:RB, LFUNC:RD->uvptr
| ins_next1
| ld TMP1, UPVAL:RB->v
| ld CRET1, 0(TMP1)
| sd CRET1, 0(RA)
| ins_next2
break;
case BC_USETV:
| // RA = uvnum*8, RD = src*8
| ld LFUNC:RB, FRAME_FUNC(BASE)
| daddu RD, BASE, RD
| cleartp LFUNC:RB
| daddu RA, RA, LFUNC:RB
| ld UPVAL:RB, LFUNC:RA->uvptr
| ld CRET1, 0(RD)
| lbu TMP3, UPVAL:RB->marked
| ld CARG2, UPVAL:RB->v
| andi TMP3, TMP3, LJ_GC_BLACK // isblack(uv)
| lbu TMP0, UPVAL:RB->closed
| gettp TMP2, CRET1
| sd CRET1, 0(CARG2)
| li AT, LJ_GC_BLACK|1
| or TMP3, TMP3, TMP0
| beq TMP3, AT, >2 // Upvalue is closed and black?
|. daddiu TMP2, TMP2, -(LJ_TNUMX+1)
|1:
| ins_next
|
|2: // Check if new value is collectable.
| sltiu AT, TMP2, LJ_TISGCV - (LJ_TNUMX+1)
| beqz AT, <1 // tvisgcv(v)
|. cleartp GCOBJ:CRET1, CRET1
| lbu TMP3, GCOBJ:CRET1->gch.marked
| andi TMP3, TMP3, LJ_GC_WHITES // iswhite(v)
| beqz TMP3, <1
|. load_got lj_gc_barrieruv
| // Crossed a write barrier. Move the barrier forward.
| call_intern lj_gc_barrieruv // (global_State *g, TValue *tv)
|. daddiu CARG1, DISPATCH, GG_DISP2G
| b <1
|. nop
break;
case BC_USETS:
| // RA = uvnum*8, RD = str_const*8 (~)
| ld LFUNC:RB, FRAME_FUNC(BASE)
| dsubu TMP1, KBASE, RD
| cleartp LFUNC:RB
| daddu RA, RA, LFUNC:RB
| ld UPVAL:RB, LFUNC:RA->uvptr
| ld STR:TMP1, -8(TMP1) // KBASE-8-str_const*8
| lbu TMP2, UPVAL:RB->marked
| ld CARG2, UPVAL:RB->v
| lbu TMP3, STR:TMP1->marked
| andi AT, TMP2, LJ_GC_BLACK // isblack(uv)
| lbu TMP2, UPVAL:RB->closed
| li TMP0, LJ_TSTR
| settp TMP1, TMP0
| bnez AT, >2
|. sd TMP1, 0(CARG2)
|1:
| ins_next
|
|2: // Check if string is white and ensure upvalue is closed.
| beqz TMP2, <1
|. andi AT, TMP3, LJ_GC_WHITES // iswhite(str)
| beqz AT, <1
|. load_got lj_gc_barrieruv
| // Crossed a write barrier. Move the barrier forward.
| call_intern lj_gc_barrieruv // (global_State *g, TValue *tv)
|. daddiu CARG1, DISPATCH, GG_DISP2G
| b <1
|. nop
break;
case BC_USETN:
| // RA = uvnum*8, RD = num_const*8
| ld LFUNC:RB, FRAME_FUNC(BASE)
| daddu RD, KBASE, RD
| cleartp LFUNC:RB
| daddu RA, RA, LFUNC:RB
| ld UPVAL:RB, LFUNC:RA->uvptr
| ld CRET1, 0(RD)
| ld TMP1, UPVAL:RB->v
| ins_next1
| sd CRET1, 0(TMP1)
| ins_next2
break;
case BC_USETP:
| // RA = uvnum*8, RD = primitive_type*8 (~)
| ld LFUNC:RB, FRAME_FUNC(BASE)
| dsll TMP0, RD, 44
| cleartp LFUNC:RB
| daddu RA, RA, LFUNC:RB
| not TMP0, TMP0
| ld UPVAL:RB, LFUNC:RA->uvptr
| ins_next1
| ld TMP1, UPVAL:RB->v
| sd TMP0, 0(TMP1)
| ins_next2
break;
case BC_UCLO:
| // RA = level*8, RD = target
| ld TMP2, L->openupval
| branch_RD // Do this first since RD is not saved.
| load_got lj_func_closeuv
| sd BASE, L->base
| beqz TMP2, >1
|. move CARG1, L
| call_intern lj_func_closeuv // (lua_State *L, TValue *level)
|. daddu CARG2, BASE, RA
| ld BASE, L->base
|1:
| ins_next
break;
case BC_FNEW:
| // RA = dst*8, RD = proto_const*8 (~) (holding function prototype)
| load_got lj_func_newL_gc
| dsubu TMP1, KBASE, RD
| ld CARG3, FRAME_FUNC(BASE)
| ld CARG2, -8(TMP1) // KBASE-8-tab_const*8
| sd BASE, L->base
| sd PC, SAVE_PC
| cleartp CARG3
| // (lua_State *L, GCproto *pt, GCfuncL *parent)
| call_intern lj_func_newL_gc
|. move CARG1, L
| // Returns GCfuncL *.
| li TMP0, LJ_TFUNC
| ld BASE, L->base
| ins_next1
| settp CRET1, TMP0
| daddu RA, BASE, RA
| sd CRET1, 0(RA)
| ins_next2
break;
/* -- Table ops --------------------------------------------------------- */
case BC_TNEW:
case BC_TDUP:
| // RA = dst*8, RD = (hbits|asize)*8 | tab_const*8 (~)
| ld TMP0, DISPATCH_GL(gc.total)(DISPATCH)
| ld TMP1, DISPATCH_GL(gc.threshold)(DISPATCH)
| sd BASE, L->base
| sd PC, SAVE_PC
| sltu AT, TMP0, TMP1
| beqz AT, >5
|1:
if (op == BC_TNEW) {
| load_got lj_tab_new
| srl CARG2, RD, 3
| andi CARG2, CARG2, 0x7ff
| li TMP0, 0x801
| addiu AT, CARG2, -0x7ff
| srl CARG3, RD, 14
| movz CARG2, TMP0, AT
| // (lua_State *L, int32_t asize, uint32_t hbits)
| call_intern lj_tab_new
|. move CARG1, L
| // Returns Table *.
} else {
| load_got lj_tab_dup
| dsubu TMP1, KBASE, RD
| move CARG1, L
| call_intern lj_tab_dup // (lua_State *L, Table *kt)
|. ld CARG2, -8(TMP1) // KBASE-8-str_const*8
| // Returns Table *.
}
| li TMP0, LJ_TTAB
| ld BASE, L->base
| ins_next1
| daddu RA, BASE, RA
| settp CRET1, TMP0
| sd CRET1, 0(RA)
| ins_next2
|5:
| load_got lj_gc_step_fixtop
| move MULTRES, RD
| call_intern lj_gc_step_fixtop // (lua_State *L)
|. move CARG1, L
| b <1
|. move RD, MULTRES
break;
case BC_GGET:
| // RA = dst*8, RD = str_const*8 (~)
case BC_GSET:
| // RA = src*8, RD = str_const*8 (~)
| ld LFUNC:TMP2, FRAME_FUNC(BASE)
| dsubu TMP1, KBASE, RD
| ld STR:RC, -8(TMP1) // KBASE-8-str_const*8
| cleartp LFUNC:TMP2
| ld TAB:RB, LFUNC:TMP2->env
if (op == BC_GGET) {
| b ->BC_TGETS_Z
} else {
| b ->BC_TSETS_Z
}
|. daddu RA, BASE, RA
break;
case BC_TGETV:
| // RA = dst*8, RB = table*8, RC = key*8
| decode_RB8a RB, INS
| decode_RB8b RB
| decode_RDtoRC8 RC, RD
| daddu CARG2, BASE, RB
| daddu CARG3, BASE, RC
| ld TAB:RB, 0(CARG2)
| ld TMP2, 0(CARG3)
| daddu RA, BASE, RA
| checktab TAB:RB, ->vmeta_tgetv
| gettp TMP3, TMP2
| bne TMP3, TISNUM, >5 // Integer key?
|. lw TMP0, TAB:RB->asize
| sextw TMP2, TMP2
| ld TMP1, TAB:RB->array
| sltu AT, TMP2, TMP0
| sll TMP2, TMP2, 3
| beqz AT, ->vmeta_tgetv // Integer key and in array part?
|. daddu TMP2, TMP1, TMP2
| ld AT, 0(TMP2)
| beq AT, TISNIL, >2
|. ld CRET1, 0(TMP2)
|1:
| ins_next1
| sd CRET1, 0(RA)
| ins_next2
|
|2: // Check for __index if table value is nil.
| ld TAB:TMP2, TAB:RB->metatable
| beqz TAB:TMP2, <1 // No metatable: done.
|. nop
| lbu TMP0, TAB:TMP2->nomm
| andi TMP0, TMP0, 1<<MM_index
| bnez TMP0, <1 // 'no __index' flag set: done.
|. nop
| b ->vmeta_tgetv
|. nop
|
|5:
| li AT, LJ_TSTR
| bne TMP3, AT, ->vmeta_tgetv
|. cleartp RC, TMP2
| b ->BC_TGETS_Z // String key?
|. nop
break;
case BC_TGETS:
| // RA = dst*8, RB = table*8, RC = str_const*8 (~)
| decode_RB8a RB, INS
| decode_RB8b RB
| decode_RC8a RC, INS
| daddu CARG2, BASE, RB
| decode_RC8b RC
| ld TAB:RB, 0(CARG2)
| dsubu CARG3, KBASE, RC
| daddu RA, BASE, RA
| ld STR:RC, -8(CARG3) // KBASE-8-str_const*8
| checktab TAB:RB, ->vmeta_tgets1
|->BC_TGETS_Z:
| // TAB:RB = GCtab *, STR:RC = GCstr *, RA = dst*8
| lw TMP0, TAB:RB->hmask
| lw TMP1, STR:RC->hash
| ld NODE:TMP2, TAB:RB->node
| and TMP1, TMP1, TMP0 // idx = str->hash & tab->hmask
| sll TMP0, TMP1, 5
| sll TMP1, TMP1, 3
| subu TMP1, TMP0, TMP1
| li TMP3, LJ_TSTR
| daddu NODE:TMP2, NODE:TMP2, TMP1 // node = tab->node + (idx*32-idx*8)
| settp STR:RC, TMP3 // Tagged key to look for.
|1:
| ld CARG1, NODE:TMP2->key
| ld CRET1, NODE:TMP2->val
| ld NODE:TMP1, NODE:TMP2->next
| bne CARG1, RC, >4
|. ld TAB:TMP3, TAB:RB->metatable
| beq CRET1, TISNIL, >5 // Key found, but nil value?
|. nop
|3:
| ins_next1
| sd CRET1, 0(RA)
| ins_next2
|
|4: // Follow hash chain.
| bnez NODE:TMP1, <1
|. move NODE:TMP2, NODE:TMP1
| // End of hash chain: key not found, nil result.
|
|5: // Check for __index if table value is nil.
| beqz TAB:TMP3, <3 // No metatable: done.
|. move CRET1, TISNIL
| lbu TMP0, TAB:TMP3->nomm
| andi TMP0, TMP0, 1<<MM_index
| bnez TMP0, <3 // 'no __index' flag set: done.
|. nop
| b ->vmeta_tgets
|. nop
break;
case BC_TGETB:
| // RA = dst*8, RB = table*8, RC = index*8
| decode_RB8a RB, INS
| decode_RB8b RB
| daddu CARG2, BASE, RB
| decode_RDtoRC8 RC, RD
| ld TAB:RB, 0(CARG2)
| daddu RA, BASE, RA
| srl TMP0, RC, 3
| checktab TAB:RB, ->vmeta_tgetb
| lw TMP1, TAB:RB->asize
| ld TMP2, TAB:RB->array
| sltu AT, TMP0, TMP1
| beqz AT, ->vmeta_tgetb
|. daddu RC, TMP2, RC
| ld AT, 0(RC)
| beq AT, TISNIL, >5
|. ld CRET1, 0(RC)
|1:
| ins_next1
| sd CRET1, 0(RA)
| ins_next2
|
|5: // Check for __index if table value is nil.
| ld TAB:TMP2, TAB:RB->metatable
| beqz TAB:TMP2, <1 // No metatable: done.
|. nop
| lbu TMP1, TAB:TMP2->nomm
| andi TMP1, TMP1, 1<<MM_index
| bnez TMP1, <1 // 'no __index' flag set: done.
|. nop
| b ->vmeta_tgetb // Caveat: preserve TMP0 and CARG2!
|. nop
break;
case BC_TGETR:
| // RA = dst*8, RB = table*8, RC = key*8
| decode_RB8a RB, INS
| decode_RB8b RB
| decode_RDtoRC8 RC, RD
| daddu RB, BASE, RB
| daddu RC, BASE, RC
| ld TAB:CARG1, 0(RB)
| lw CARG2, LO(RC)
| daddu RA, BASE, RA
| cleartp TAB:CARG1
| lw TMP0, TAB:CARG1->asize
| ld TMP1, TAB:CARG1->array
| sltu AT, CARG2, TMP0
| sll TMP2, CARG2, 3
| beqz AT, ->vmeta_tgetr // In array part?
|. daddu CRET1, TMP1, TMP2
| ld CARG2, 0(CRET1)
|->BC_TGETR_Z:
| ins_next1
| sd CARG2, 0(RA)
| ins_next2
break;
case BC_TSETV:
| // RA = src*8, RB = table*8, RC = key*8
| decode_RB8a RB, INS
| decode_RB8b RB
| decode_RDtoRC8 RC, RD
| daddu CARG2, BASE, RB
| daddu CARG3, BASE, RC
| ld RB, 0(CARG2)
| ld TMP2, 0(CARG3)
| daddu RA, BASE, RA
| checktab RB, ->vmeta_tsetv
| checkint TMP2, >5
|. sextw RC, TMP2
| lw TMP0, TAB:RB->asize
| ld TMP1, TAB:RB->array
| sltu AT, RC, TMP0
| sll TMP2, RC, 3
| beqz AT, ->vmeta_tsetv // Integer key and in array part?
|. daddu TMP1, TMP1, TMP2
| ld TMP0, 0(TMP1)
| lbu TMP3, TAB:RB->marked
| beq TMP0, TISNIL, >3
|. ld CRET1, 0(RA)
|1:
| andi AT, TMP3, LJ_GC_BLACK // isblack(table)
| bnez AT, >7
|. sd CRET1, 0(TMP1)
|2:
| ins_next
|
|3: // Check for __newindex if previous value is nil.
| ld TAB:TMP2, TAB:RB->metatable
| beqz TAB:TMP2, <1 // No metatable: done.
|. nop
| lbu TMP2, TAB:TMP2->nomm
| andi TMP2, TMP2, 1<<MM_newindex
| bnez TMP2, <1 // 'no __newindex' flag set: done.
|. nop
| b ->vmeta_tsetv
|. nop
|
|5:
| gettp AT, TMP2
| daddiu AT, AT, -LJ_TSTR
| bnez AT, ->vmeta_tsetv
|. nop
| b ->BC_TSETS_Z // String key?
|. cleartp STR:RC, TMP2
|
|7: // Possible table write barrier for the value. Skip valiswhite check.
| barrierback TAB:RB, TMP3, TMP0, <2
break;
case BC_TSETS:
| // RA = src*8, RB = table*8, RC = str_const*8 (~)
| decode_RB8a RB, INS
| decode_RB8b RB
| daddu CARG2, BASE, RB
| decode_RC8a RC, INS
| ld TAB:RB, 0(CARG2)
| decode_RC8b RC
| dsubu CARG3, KBASE, RC
| ld RC, -8(CARG3) // KBASE-8-str_const*8
| daddu RA, BASE, RA
| cleartp STR:RC
| checktab TAB:RB, ->vmeta_tsets1
|->BC_TSETS_Z:
| // TAB:RB = GCtab *, STR:RC = GCstr *, RA = BASE+src*8
| lw TMP0, TAB:RB->hmask
| lw TMP1, STR:RC->hash
| ld NODE:TMP2, TAB:RB->node
| sb r0, TAB:RB->nomm // Clear metamethod cache.
| and TMP1, TMP1, TMP0 // idx = str->hash & tab->hmask
| sll TMP0, TMP1, 5
| sll TMP1, TMP1, 3
| subu TMP1, TMP0, TMP1
| li TMP3, LJ_TSTR
| daddu NODE:TMP2, NODE:TMP2, TMP1 // node = tab->node + (idx*32-idx*8)
| settp STR:RC, TMP3 // Tagged key to look for.
|.if FPU
| ldc1 f20, 0(RA)
|.else
| ld CRET1, 0(RA)
|.endif
|1:
| ld TMP0, NODE:TMP2->key
| ld CARG2, NODE:TMP2->val
| ld NODE:TMP1, NODE:TMP2->next
| bne TMP0, RC, >5
|. lbu TMP3, TAB:RB->marked
| beq CARG2, TISNIL, >4 // Key found, but nil value?
|. ld TAB:TMP0, TAB:RB->metatable
|2:
| andi AT, TMP3, LJ_GC_BLACK // isblack(table)
| bnez AT, >7
|.if FPU
|. sdc1 f20, NODE:TMP2->val
|.else
|. sd CRET1, NODE:TMP2->val
|.endif
|3:
| ins_next
|
|4: // Check for __newindex if previous value is nil.
| beqz TAB:TMP0, <2 // No metatable: done.
|. nop
| lbu TMP0, TAB:TMP0->nomm
| andi TMP0, TMP0, 1<<MM_newindex
| bnez TMP0, <2 // 'no __newindex' flag set: done.
|. nop
| b ->vmeta_tsets
|. nop
|
|5: // Follow hash chain.
| bnez NODE:TMP1, <1
|. move NODE:TMP2, NODE:TMP1
| // End of hash chain: key not found, add a new one
|
| // But check for __newindex first.
| ld TAB:TMP2, TAB:RB->metatable
| beqz TAB:TMP2, >6 // No metatable: continue.
|. daddiu CARG3, DISPATCH, DISPATCH_GL(tmptv)
| lbu TMP0, TAB:TMP2->nomm
| andi TMP0, TMP0, 1<<MM_newindex
| beqz TMP0, ->vmeta_tsets // 'no __newindex' flag NOT set: check.
|6:
| load_got lj_tab_newkey
| sd RC, 0(CARG3)
| sd BASE, L->base
| move CARG2, TAB:RB
| sd PC, SAVE_PC
| call_intern lj_tab_newkey // (lua_State *L, GCtab *t, TValue *k
|. move CARG1, L
| // Returns TValue *.
| ld BASE, L->base
|.if FPU
| b <3 // No 2nd write barrier needed.
|. sdc1 f20, 0(CRET1)
|.else
| ld CARG1, 0(RA)
| b <3 // No 2nd write barrier needed.
|. sd CARG1, 0(CRET1)
|.endif
|
|7: // Possible table write barrier for the value. Skip valiswhite check.
| barrierback TAB:RB, TMP3, TMP0, <3
break;
case BC_TSETB:
| // RA = src*8, RB = table*8, RC = index*8
| decode_RB8a RB, INS
| decode_RB8b RB
| daddu CARG2, BASE, RB
| decode_RDtoRC8 RC, RD
| ld TAB:RB, 0(CARG2)
| daddu RA, BASE, RA
| srl TMP0, RC, 3
| checktab RB, ->vmeta_tsetb
| lw TMP1, TAB:RB->asize
| ld TMP2, TAB:RB->array
| sltu AT, TMP0, TMP1
| beqz AT, ->vmeta_tsetb
|. daddu RC, TMP2, RC
| ld TMP1, 0(RC)
| lbu TMP3, TAB:RB->marked
| beq TMP1, TISNIL, >5
|1:
|. ld CRET1, 0(RA)
| andi AT, TMP3, LJ_GC_BLACK // isblack(table)
| bnez AT, >7
|. sd CRET1, 0(RC)
|2:
| ins_next
|
|5: // Check for __newindex if previous value is nil.
| ld TAB:TMP2, TAB:RB->metatable
| beqz TAB:TMP2, <1 // No metatable: done.
|. nop
| lbu TMP1, TAB:TMP2->nomm
| andi TMP1, TMP1, 1<<MM_newindex
| bnez TMP1, <1 // 'no __newindex' flag set: done.
|. nop
| b ->vmeta_tsetb // Caveat: preserve TMP0 and CARG2!
|. nop
|
|7: // Possible table write barrier for the value. Skip valiswhite check.
| barrierback TAB:RB, TMP3, TMP0, <2
break;
case BC_TSETR:
| // RA = dst*8, RB = table*8, RC = key*8
| decode_RB8a RB, INS
| decode_RB8b RB
| decode_RDtoRC8 RC, RD
| daddu CARG1, BASE, RB
| daddu CARG3, BASE, RC
| ld TAB:CARG2, 0(CARG1)
| lw CARG3, LO(CARG3)
| cleartp TAB:CARG2
| lbu TMP3, TAB:CARG2->marked
| lw TMP0, TAB:CARG2->asize
| ld TMP1, TAB:CARG2->array
| andi AT, TMP3, LJ_GC_BLACK // isblack(table)
| bnez AT, >7
|. daddu RA, BASE, RA
|2:
| sltu AT, CARG3, TMP0
| sll TMP2, CARG3, 3
| beqz AT, ->vmeta_tsetr // In array part?
|. daddu CRET1, TMP1, TMP2
|->BC_TSETR_Z:
| ld CARG1, 0(RA)
| ins_next1
| sd CARG1, 0(CRET1)
| ins_next2
|
|7: // Possible table write barrier for the value. Skip valiswhite check.
| barrierback TAB:CARG2, TMP3, CRET1, <2
break;
case BC_TSETM:
| // RA = base*8 (table at base-1), RD = num_const*8 (start index)
| daddu RA, BASE, RA
|1:
| daddu TMP3, KBASE, RD
| ld TAB:CARG2, -8(RA) // Guaranteed to be a table.
| addiu TMP0, MULTRES, -8
| lw TMP3, LO(TMP3) // Integer constant is in lo-word.
| beqz TMP0, >4 // Nothing to copy?
|. srl CARG3, TMP0, 3
| cleartp CARG2
| addu CARG3, CARG3, TMP3
| lw TMP2, TAB:CARG2->asize
| sll TMP1, TMP3, 3
| lbu TMP3, TAB:CARG2->marked
| ld CARG1, TAB:CARG2->array
| sltu AT, TMP2, CARG3
| bnez AT, >5
|. daddu TMP2, RA, TMP0
| daddu TMP1, TMP1, CARG1
| andi TMP0, TMP3, LJ_GC_BLACK // isblack(table)
|3: // Copy result slots to table.
| ld CRET1, 0(RA)
| daddiu RA, RA, 8
| sltu AT, RA, TMP2
| sd CRET1, 0(TMP1)
| bnez AT, <3
|. daddiu TMP1, TMP1, 8
| bnez TMP0, >7
|. nop
|4:
| ins_next
|
|5: // Need to resize array part.
| load_got lj_tab_reasize
| sd BASE, L->base
| sd PC, SAVE_PC
| move BASE, RD
| call_intern lj_tab_reasize // (lua_State *L, GCtab *t, int nasize)
|. move CARG1, L
| // Must not reallocate the stack.
| move RD, BASE
| b <1
|. ld BASE, L->base // Reload BASE for lack of a saved register.
|
|7: // Possible table write barrier for any value. Skip valiswhite check.
| barrierback TAB:CARG2, TMP3, TMP0, <4
break;
/* -- Calls and vararg handling ----------------------------------------- */
case BC_CALLM:
| // RA = base*8, (RB = (nresults+1)*8,) RC = extra_nargs*8
| decode_RDtoRC8 NARGS8:RC, RD
| b ->BC_CALL_Z
|. addu NARGS8:RC, NARGS8:RC, MULTRES
break;
case BC_CALL:
| // RA = base*8, (RB = (nresults+1)*8,) RC = (nargs+1)*8
| decode_RDtoRC8 NARGS8:RC, RD
|->BC_CALL_Z:
| move TMP2, BASE
| daddu BASE, BASE, RA
| ld LFUNC:RB, 0(BASE)
| daddiu BASE, BASE, 16
| addiu NARGS8:RC, NARGS8:RC, -8
| checkfunc RB, ->vmeta_call
| ins_call
break;
case BC_CALLMT:
| // RA = base*8, (RB = 0,) RC = extra_nargs*8
| addu NARGS8:RD, NARGS8:RD, MULTRES // BC_CALLT gets RC from RD.
| // Fall through. Assumes BC_CALLT follows.
break;
case BC_CALLT:
| // RA = base*8, (RB = 0,) RC = (nargs+1)*8
| daddu RA, BASE, RA
| ld RB, 0(RA)
| move NARGS8:RC, RD
| ld TMP1, FRAME_PC(BASE)
| daddiu RA, RA, 16
| addiu NARGS8:RC, NARGS8:RC, -8
| checktp CARG3, RB, -LJ_TFUNC, ->vmeta_callt
|->BC_CALLT_Z:
| andi TMP0, TMP1, FRAME_TYPE // Caveat: preserve TMP0 until the 'or'.
| lbu TMP3, LFUNC:CARG3->ffid
| bnez TMP0, >7
|. xori TMP2, TMP1, FRAME_VARG
|1:
| sd RB, FRAME_FUNC(BASE) // Copy function down, but keep PC.
| sltiu AT, TMP3, 2 // (> FF_C) Calling a fast function?
| move TMP2, BASE
| move RB, CARG3
| beqz NARGS8:RC, >3
|. move TMP3, NARGS8:RC
|2:
| ld CRET1, 0(RA)
| daddiu RA, RA, 8
| addiu TMP3, TMP3, -8
| sd CRET1, 0(TMP2)
| bnez TMP3, <2
|. daddiu TMP2, TMP2, 8
|3:
| or TMP0, TMP0, AT
| beqz TMP0, >5
|. nop
|4:
| ins_callt
|
|5: // Tailcall to a fast function with a Lua frame below.
| lw INS, -4(TMP1)
| decode_RA8a RA, INS
| decode_RA8b RA
| dsubu TMP1, BASE, RA
| ld TMP1, -32(TMP1)
| cleartp LFUNC:TMP1
| ld TMP1, LFUNC:TMP1->pc
| b <4
|. ld KBASE, PC2PROTO(k)(TMP1) // Need to prepare KBASE.
|
|7: // Tailcall from a vararg function.
| andi AT, TMP2, FRAME_TYPEP
| bnez AT, <1 // Vararg frame below?
|. dsubu TMP2, BASE, TMP2 // Relocate BASE down.
| move BASE, TMP2
| ld TMP1, FRAME_PC(TMP2)
| b <1
|. andi TMP0, TMP1, FRAME_TYPE
break;
case BC_ITERC:
| // RA = base*8, (RB = (nresults+1)*8, RC = (nargs+1)*8 ((2+1)*8))
| move TMP2, BASE // Save old BASE fir vmeta_call.
| daddu BASE, BASE, RA
| ld RB, -24(BASE)
| ld CARG1, -16(BASE)
| ld CARG2, -8(BASE)
| li NARGS8:RC, 16 // Iterators get 2 arguments.
| sd RB, 0(BASE) // Copy callable.
| sd CARG1, 16(BASE) // Copy state.
| sd CARG2, 24(BASE) // Copy control var.
| daddiu BASE, BASE, 16
| checkfunc RB, ->vmeta_call
| ins_call
break;
case BC_ITERN:
| // RA = base*8, (RB = (nresults+1)*8, RC = (nargs+1)*8 (2+1)*8)
|.if JIT
| // NYI: add hotloop, record BC_ITERN.
|.endif
| daddu RA, BASE, RA
| ld TAB:RB, -16(RA)
| lw RC, -8+LO(RA) // Get index from control var.
| cleartp TAB:RB
| daddiu PC, PC, 4
| lw TMP0, TAB:RB->asize
| ld TMP1, TAB:RB->array
| dsll CARG3, TISNUM, 47
|1: // Traverse array part.
| sltu AT, RC, TMP0
| beqz AT, >5 // Index points after array part?
|. sll TMP3, RC, 3
| daddu TMP3, TMP1, TMP3
| ld CARG1, 0(TMP3)
| lhu RD, -4+OFS_RD(PC)
| or TMP2, RC, CARG3
| beq CARG1, TISNIL, <1 // Skip holes in array part.
|. addiu RC, RC, 1
| sd TMP2, 0(RA)
| sd CARG1, 8(RA)
| or TMP0, RC, CARG3
| lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535)
| decode_RD4b RD
| daddu RD, RD, TMP3
| sw TMP0, -8+LO(RA) // Update control var.
| daddu PC, PC, RD
|3:
| ins_next
|
|5: // Traverse hash part.
| lw TMP1, TAB:RB->hmask
| subu RC, RC, TMP0
| ld TMP2, TAB:RB->node
|6:
| sltu AT, TMP1, RC // End of iteration? Branch to ITERL+1.
| bnez AT, <3
|. sll TMP3, RC, 5
| sll RB, RC, 3
| subu TMP3, TMP3, RB
| daddu NODE:TMP3, TMP3, TMP2
| ld CARG1, 0(NODE:TMP3)
| lhu RD, -4+OFS_RD(PC)
| beq CARG1, TISNIL, <6 // Skip holes in hash part.
|. addiu RC, RC, 1
| ld CARG2, NODE:TMP3->key
| lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535)
| sd CARG1, 8(RA)
| addu RC, RC, TMP0
| decode_RD4b RD
| addu RD, RD, TMP3
| sd CARG2, 0(RA)
| daddu PC, PC, RD
| b <3
|. sw RC, -8+LO(RA) // Update control var.
break;
case BC_ISNEXT:
| // RA = base*8, RD = target (points to ITERN)
| daddu RA, BASE, RA
| srl TMP0, RD, 1
| ld CFUNC:CARG1, -24(RA)
| daddu TMP0, PC, TMP0
| ld CARG2, -16(RA)
| ld CARG3, -8(RA)
| lui TMP2, (-(BCBIAS_J*4 >> 16) & 65535)
| checkfunc CFUNC:CARG1, >5
| gettp CARG2, CARG2
| daddiu CARG2, CARG2, -LJ_TTAB
| lbu TMP1, CFUNC:CARG1->ffid
| daddiu CARG3, CARG3, -LJ_TNIL
| or AT, CARG2, CARG3
| daddiu TMP1, TMP1, -FF_next_N
| or AT, AT, TMP1
| bnez AT, >5
|. lui TMP1, 0xfffe
| daddu PC, TMP0, TMP2
| ori TMP1, TMP1, 0x7fff
| dsll TMP1, TMP1, 32
| sd TMP1, -8(RA)
|1:
| ins_next
|5: // Despecialize bytecode if any of the checks fail.
| li TMP3, BC_JMP
| li TMP1, BC_ITERC
| sb TMP3, -4+OFS_OP(PC)
| daddu PC, TMP0, TMP2
| b <1
|. sb TMP1, OFS_OP(PC)
break;
case BC_VARG:
| // RA = base*8, RB = (nresults+1)*8, RC = numparams*8
| ld TMP0, FRAME_PC(BASE)
| decode_RDtoRC8 RC, RD
| decode_RB8a RB, INS
| daddu RC, BASE, RC
| decode_RB8b RB
| daddu RA, BASE, RA
| daddiu RC, RC, FRAME_VARG
| daddu TMP2, RA, RB
| daddiu TMP3, BASE, -16 // TMP3 = vtop
| dsubu RC, RC, TMP0 // RC = vbase
| // Note: RC may now be even _above_ BASE if nargs was < numparams.
| beqz RB, >5 // Copy all varargs?
|. dsubu TMP1, TMP3, RC
| daddiu TMP2, TMP2, -16
|1: // Copy vararg slots to destination slots.
| ld CARG1, 0(RC)
| sltu AT, RC, TMP3
| daddiu RC, RC, 8
| movz CARG1, TISNIL, AT
| sd CARG1, 0(RA)
| sltu AT, RA, TMP2
| bnez AT, <1
|. daddiu RA, RA, 8
|3:
| ins_next
|
|5: // Copy all varargs.
| ld TMP0, L->maxstack
| blez TMP1, <3 // No vararg slots?
|. li MULTRES, 8 // MULTRES = (0+1)*8
| daddu TMP2, RA, TMP1
| sltu AT, TMP0, TMP2
| bnez AT, >7
|. daddiu MULTRES, TMP1, 8
|6:
| ld CRET1, 0(RC)
| daddiu RC, RC, 8
| sd CRET1, 0(RA)
| sltu AT, RC, TMP3
| bnez AT, <6 // More vararg slots?
|. daddiu RA, RA, 8
| b <3
|. nop
|
|7: // Grow stack for varargs.
| load_got lj_state_growstack
| sd RA, L->top
| dsubu RA, RA, BASE
| sd BASE, L->base
| dsubu BASE, RC, BASE // Need delta, because BASE may change.
| sd PC, SAVE_PC
| srl CARG2, TMP1, 3
| call_intern lj_state_growstack // (lua_State *L, int n)
|. move CARG1, L
| move RC, BASE
| ld BASE, L->base
| daddu RA, BASE, RA
| daddu RC, BASE, RC
| b <6
|. daddiu TMP3, BASE, -16
break;
/* -- Returns ----------------------------------------------------------- */
case BC_RETM:
| // RA = results*8, RD = extra_nresults*8
| addu RD, RD, MULTRES // MULTRES >= 8, so RD >= 8.
| // Fall through. Assumes BC_RET follows.
break;
case BC_RET:
| // RA = results*8, RD = (nresults+1)*8
| ld PC, FRAME_PC(BASE)
| daddu RA, BASE, RA
| move MULTRES, RD
|1:
| andi TMP0, PC, FRAME_TYPE
| bnez TMP0, ->BC_RETV_Z
|. xori TMP1, PC, FRAME_VARG
|
|->BC_RET_Z:
| // BASE = base, RA = resultptr, RD = (nresults+1)*8, PC = return
| lw INS, -4(PC)
| daddiu TMP2, BASE, -16
| daddiu RC, RD, -8
| decode_RA8a TMP0, INS
| decode_RB8a RB, INS
| decode_RA8b TMP0
| decode_RB8b RB
| daddu TMP3, TMP2, RB
| beqz RC, >3
|. dsubu BASE, TMP2, TMP0
|2:
| ld CRET1, 0(RA)
| daddiu RA, RA, 8
| daddiu RC, RC, -8
| sd CRET1, 0(TMP2)
| bnez RC, <2
|. daddiu TMP2, TMP2, 8
|3:
| daddiu TMP3, TMP3, -8
|5:
| sltu AT, TMP2, TMP3
| bnez AT, >6
|. ld LFUNC:TMP1, FRAME_FUNC(BASE)
| ins_next1
| cleartp LFUNC:TMP1
| ld TMP1, LFUNC:TMP1->pc
| ld KBASE, PC2PROTO(k)(TMP1)
| ins_next2
|
|6: // Fill up results with nil.
| sd TISNIL, 0(TMP2)
| b <5
|. daddiu TMP2, TMP2, 8
|
|->BC_RETV_Z: // Non-standard return case.
| andi TMP2, TMP1, FRAME_TYPEP
| bnez TMP2, ->vm_return
|. nop
| // Return from vararg function: relocate BASE down.
| dsubu BASE, BASE, TMP1
| b <1
|. ld PC, FRAME_PC(BASE)
break;
case BC_RET0: case BC_RET1:
| // RA = results*8, RD = (nresults+1)*8
| ld PC, FRAME_PC(BASE)
| daddu RA, BASE, RA
| move MULTRES, RD
| andi TMP0, PC, FRAME_TYPE
| bnez TMP0, ->BC_RETV_Z
|. xori TMP1, PC, FRAME_VARG
| lw INS, -4(PC)
| daddiu TMP2, BASE, -16
if (op == BC_RET1) {
| ld CRET1, 0(RA)
}
| decode_RB8a RB, INS
| decode_RA8a RA, INS
| decode_RB8b RB
| decode_RA8b RA
| dsubu BASE, TMP2, RA
if (op == BC_RET1) {
| sd CRET1, 0(TMP2)
}
|5:
| sltu AT, RD, RB
| bnez AT, >6
|. ld TMP1, FRAME_FUNC(BASE)
| ins_next1
| cleartp LFUNC:TMP1
| ld TMP1, LFUNC:TMP1->pc
| ld KBASE, PC2PROTO(k)(TMP1)
| ins_next2
|
|6: // Fill up results with nil.
| daddiu TMP2, TMP2, 8
| daddiu RD, RD, 8
| b <5
if (op == BC_RET1) {
|. sd TISNIL, 0(TMP2)
} else {
|. sd TISNIL, -8(TMP2)
}
break;
/* -- Loops and branches ------------------------------------------------ */
case BC_FORL:
|.if JIT
| hotloop
|.endif
| // Fall through. Assumes BC_IFORL follows.
break;
case BC_JFORI:
case BC_JFORL:
#if !LJ_HASJIT
break;
#endif
case BC_FORI:
case BC_IFORL:
| // RA = base*8, RD = target (after end of loop or start of loop)
vk = (op == BC_IFORL || op == BC_JFORL);
| daddu RA, BASE, RA
| ld CARG1, FORL_IDX*8(RA) // IDX CARG1 - CARG3 type
| gettp CARG3, CARG1
if (op != BC_JFORL) {
| srl RD, RD, 1
| lui TMP2, (-(BCBIAS_J*4 >> 16) & 65535)
| daddu TMP2, RD, TMP2
}
if (!vk) {
| ld CARG2, FORL_STOP*8(RA) // STOP CARG2 - CARG4 type
| ld CRET1, FORL_STEP*8(RA) // STEP CRET1 - CRET2 type
| gettp CARG4, CARG2
| bne CARG3, TISNUM, >5
|. gettp CRET2, CRET1
| bne CARG4, TISNUM, ->vmeta_for
|. sextw CARG3, CARG1
| bne CRET2, TISNUM, ->vmeta_for
|. sextw CARG2, CARG2
| dext AT, CRET1, 31, 0
| slt CRET1, CARG2, CARG3
| slt TMP1, CARG3, CARG2
| movn CRET1, TMP1, AT
} else {
| bne CARG3, TISNUM, >5
|. ld CARG2, FORL_STEP*8(RA) // STEP CARG2 - CARG4 type
| ld CRET1, FORL_STOP*8(RA) // STOP CRET1 - CRET2 type
| sextw TMP3, CARG1
| sextw CARG2, CARG2
| sextw CRET1, CRET1
| addu CARG1, TMP3, CARG2
| xor TMP0, CARG1, TMP3
| xor TMP1, CARG1, CARG2
| and TMP0, TMP0, TMP1
| slt TMP1, CARG1, CRET1
| slt CRET1, CRET1, CARG1
| slt AT, CARG2, r0
| slt TMP0, TMP0, r0 // ((y^a) & (y^b)) < 0: overflow.
| movn CRET1, TMP1, AT
| or CRET1, CRET1, TMP0
| zextw CARG1, CARG1
| settp CARG1, TISNUM
}
|1:
if (op == BC_FORI) {
| movz TMP2, r0, CRET1
| daddu PC, PC, TMP2
} else if (op == BC_JFORI) {
| daddu PC, PC, TMP2
| lhu RD, -4+OFS_RD(PC)
} else if (op == BC_IFORL) {
| movn TMP2, r0, CRET1
| daddu PC, PC, TMP2
}
if (vk) {
| sd CARG1, FORL_IDX*8(RA)
}
| ins_next1
| sd CARG1, FORL_EXT*8(RA)
|2:
if (op == BC_JFORI) {
| beqz CRET1, =>BC_JLOOP
|. decode_RD8b RD
} else if (op == BC_JFORL) {
| beqz CRET1, =>BC_JLOOP
}
| ins_next2
|
|5: // FP loop.
|.if FPU
if (!vk) {
| ldc1 f0, FORL_IDX*8(RA)
| ldc1 f2, FORL_STOP*8(RA)
| sltiu TMP0, CARG3, LJ_TISNUM
| sltiu TMP1, CARG4, LJ_TISNUM
| sltiu AT, CRET2, LJ_TISNUM
| ld TMP3, FORL_STEP*8(RA)
| and TMP0, TMP0, TMP1
| and AT, AT, TMP0
| beqz AT, ->vmeta_for
|. slt TMP3, TMP3, r0
| c.ole.d 0, f0, f2
| c.ole.d 1, f2, f0
| li CRET1, 1
| movt CRET1, r0, 0
| movt AT, r0, 1
| b <1
|. movn CRET1, AT, TMP3
} else {
| ldc1 f0, FORL_IDX*8(RA)
| ldc1 f4, FORL_STEP*8(RA)
| ldc1 f2, FORL_STOP*8(RA)
| ld TMP3, FORL_STEP*8(RA)
| add.d f0, f0, f4
| c.ole.d 0, f0, f2
| c.ole.d 1, f2, f0
| slt TMP3, TMP3, r0
| li CRET1, 1
| li AT, 1
| movt CRET1, r0, 0
| movt AT, r0, 1
| movn CRET1, AT, TMP3
if (op == BC_IFORL) {
| movn TMP2, r0, CRET1
| daddu PC, PC, TMP2
}
| sdc1 f0, FORL_IDX*8(RA)
| ins_next1
| b <2
|. sdc1 f0, FORL_EXT*8(RA)
}
|.else
if (!vk) {
| sltiu TMP0, CARG3, LJ_TISNUM
| sltiu TMP1, CARG4, LJ_TISNUM
| sltiu AT, CRET2, LJ_TISNUM
| and TMP0, TMP0, TMP1
| and AT, AT, TMP0
| beqz AT, ->vmeta_for
|. nop
| bal ->vm_sfcmpolex
|. lw TMP3, FORL_STEP*8+HI(RA)
| b <1
|. nop
} else {
| load_got __adddf3
| call_extern
|. sw TMP2, TMPD
| ld CARG2, FORL_STOP*8(RA)
| move CARG1, CRET1
if ( op == BC_JFORL ) {
| lhu RD, -4+OFS_RD(PC)
| decode_RD8b RD
}
| bal ->vm_sfcmpolex
|. lw TMP3, FORL_STEP*8+HI(RA)
| b <1
|. lw TMP2, TMPD
}
|.endif
break;
case BC_ITERL:
|.if JIT
| hotloop
|.endif
| // Fall through. Assumes BC_IITERL follows.
break;
case BC_JITERL:
#if !LJ_HASJIT
break;
#endif
case BC_IITERL:
| // RA = base*8, RD = target
| daddu RA, BASE, RA
| ld TMP1, 0(RA)
| beq TMP1, TISNIL, >1 // Stop if iterator returned nil.
|. nop
if (op == BC_JITERL) {
| b =>BC_JLOOP
|. sd TMP1, -8(RA)
} else {
| branch_RD // Otherwise save control var + branch.
| sd TMP1, -8(RA)
}
|1:
| ins_next
break;
case BC_LOOP:
| // RA = base*8, RD = target (loop extent)
| // Note: RA/RD is only used by trace recorder to determine scope/extent
| // This opcode does NOT jump, it's only purpose is to detect a hot loop.
|.if JIT
| hotloop
|.endif
| // Fall through. Assumes BC_ILOOP follows.
break;
case BC_ILOOP:
| // RA = base*8, RD = target (loop extent)
| ins_next
break;
case BC_JLOOP:
|.if JIT
| // RA = base*8 (ignored), RD = traceno*8
| ld TMP1, DISPATCH_J(trace)(DISPATCH)
| li AT, 0
| daddu TMP1, TMP1, RD
| // Traces on MIPS don't store the trace number, so use 0.
| sd AT, DISPATCH_GL(vmstate)(DISPATCH)
| ld TRACE:TMP2, 0(TMP1)
| sd BASE, DISPATCH_GL(jit_base)(DISPATCH)
| ld TMP2, TRACE:TMP2->mcode
| sd L, DISPATCH_GL(tmpbuf.L)(DISPATCH)
| jr TMP2
|. daddiu JGL, DISPATCH, GG_DISP2G+32768
|.endif
break;
case BC_JMP:
| // RA = base*8 (only used by trace recorder), RD = target
| branch_RD
| ins_next
break;
/* -- Function headers -------------------------------------------------- */
case BC_FUNCF:
|.if JIT
| hotcall
|.endif
case BC_FUNCV: /* NYI: compiled vararg functions. */
| // Fall through. Assumes BC_IFUNCF/BC_IFUNCV follow.
break;
case BC_JFUNCF:
#if !LJ_HASJIT
break;
#endif
case BC_IFUNCF:
| // BASE = new base, RA = BASE+framesize*8, RB = LFUNC, RC = nargs*8
| ld TMP2, L->maxstack
| lbu TMP1, -4+PC2PROTO(numparams)(PC)
| ld KBASE, -4+PC2PROTO(k)(PC)
| sltu AT, TMP2, RA
| bnez AT, ->vm_growstack_l
|. sll TMP1, TMP1, 3
if (op != BC_JFUNCF) {
| ins_next1
}
|2:
| sltu AT, NARGS8:RC, TMP1 // Check for missing parameters.
| bnez AT, >3
|. daddu AT, BASE, NARGS8:RC
if (op == BC_JFUNCF) {
| decode_RD8a RD, INS
| b =>BC_JLOOP
|. decode_RD8b RD
} else {
| ins_next2
}
|
|3: // Clear missing parameters.
| sd TISNIL, 0(AT)
| b <2
|. addiu NARGS8:RC, NARGS8:RC, 8
break;
case BC_JFUNCV:
#if !LJ_HASJIT
break;
#endif
| NYI // NYI: compiled vararg functions
break; /* NYI: compiled vararg functions. */
case BC_IFUNCV:
| // BASE = new base, RA = BASE+framesize*8, RB = LFUNC, RC = nargs*8
| li TMP0, LJ_TFUNC
| daddu TMP1, BASE, RC
| ld TMP2, L->maxstack
| settp LFUNC:RB, TMP0
| daddu TMP0, RA, RC
| sd LFUNC:RB, 0(TMP1) // Store (tagged) copy of LFUNC.
| daddiu TMP3, RC, 16+FRAME_VARG
| sltu AT, TMP0, TMP2
| ld KBASE, -4+PC2PROTO(k)(PC)
| beqz AT, ->vm_growstack_l
|. sd TMP3, 8(TMP1) // Store delta + FRAME_VARG.
| lbu TMP2, -4+PC2PROTO(numparams)(PC)
| move RA, BASE
| move RC, TMP1
| ins_next1
| beqz TMP2, >3
|. daddiu BASE, TMP1, 16
|1:
| ld TMP0, 0(RA)
| sltu AT, RA, RC // Less args than parameters?
| move CARG1, TMP0
| movz TMP0, TISNIL, AT // Clear missing parameters.
| movn CARG1, TISNIL, AT // Clear old fixarg slot (help the GC).
| addiu TMP2, TMP2, -1
| sd TMP0, 16(TMP1)
| daddiu TMP1, TMP1, 8
| sd CARG1, 0(RA)
| bnez TMP2, <1
|. daddiu RA, RA, 8
|3:
| ins_next2
break;
case BC_FUNCC:
case BC_FUNCCW:
| // BASE = new base, RA = BASE+framesize*8, RB = CFUNC, RC = nargs*8
if (op == BC_FUNCC) {
| ld CFUNCADDR, CFUNC:RB->f
} else {
| ld CFUNCADDR, DISPATCH_GL(wrapf)(DISPATCH)
}
| daddu TMP1, RA, NARGS8:RC
| ld TMP2, L->maxstack
| daddu RC, BASE, NARGS8:RC
| sd BASE, L->base
| sltu AT, TMP2, TMP1
| sd RC, L->top
| li_vmstate C
if (op == BC_FUNCCW) {
| ld CARG2, CFUNC:RB->f
}
| bnez AT, ->vm_growstack_c // Need to grow stack.
|. move CARG1, L
| jalr CFUNCADDR // (lua_State *L [, lua_CFunction f])
|. st_vmstate
| // Returns nresults.
| ld BASE, L->base
| sll RD, CRET1, 3
| ld TMP1, L->top
| li_vmstate INTERP
| ld PC, FRAME_PC(BASE) // Fetch PC of caller.
| dsubu RA, TMP1, RD // RA = L->top - nresults*8
| sd L, DISPATCH_GL(cur_L)(DISPATCH)
| b ->vm_returnc
|. st_vmstate
break;
/* ---------------------------------------------------------------------- */
default:
fprintf(stderr, "Error: undefined opcode BC_%s\n", bc_names[op]);
exit(2);
break;
}
}
static int build_backend(BuildCtx *ctx)
{
int op;
dasm_growpc(Dst, BC__MAX);
build_subroutines(ctx);
|.code_op
for (op = 0; op < BC__MAX; op++)
build_ins(ctx, (BCOp)op, op);
return BC__MAX;
}
/* Emit pseudo frame-info for all assembler functions. */
static void emit_asm_debug(BuildCtx *ctx)
{
int fcofs = (int)((uint8_t *)ctx->glob[GLOB_vm_ffi_call] - ctx->code);
int i;
switch (ctx->mode) {
case BUILD_elfasm:
fprintf(ctx->fp, "\t.section .debug_frame,\"\",@progbits\n");
fprintf(ctx->fp,
".Lframe0:\n"
"\t.4byte .LECIE0-.LSCIE0\n"
".LSCIE0:\n"
"\t.4byte 0xffffffff\n"
"\t.byte 0x1\n"
"\t.string \"\"\n"
"\t.uleb128 0x1\n"
"\t.sleb128 -4\n"
"\t.byte 31\n"
"\t.byte 0xc\n\t.uleb128 29\n\t.uleb128 0\n"
"\t.align 2\n"
".LECIE0:\n\n");
fprintf(ctx->fp,
".LSFDE0:\n"
"\t.4byte .LEFDE0-.LASFDE0\n"
".LASFDE0:\n"
"\t.4byte .Lframe0\n"
"\t.8byte .Lbegin\n"
"\t.8byte %d\n"
"\t.byte 0xe\n\t.uleb128 %d\n"
"\t.byte 0x9f\n\t.sleb128 2*5\n"
"\t.byte 0x9e\n\t.sleb128 2*6\n",
fcofs, CFRAME_SIZE);
for (i = 23; i >= 16; i--)
fprintf(ctx->fp, "\t.byte %d\n\t.uleb128 %d\n", 0x80+i, 2*(30-i));
#if !LJ_SOFTFP
for (i = 31; i >= 24; i--)
fprintf(ctx->fp, "\t.byte %d\n\t.uleb128 %d\n", 0x80+32+i, 2*(46-i));
#endif
fprintf(ctx->fp,
"\t.align 2\n"
".LEFDE0:\n\n");
#if LJ_HASFFI
fprintf(ctx->fp,
".LSFDE1:\n"
"\t.4byte .LEFDE1-.LASFDE1\n"
".LASFDE1:\n"
"\t.4byte .Lframe0\n"
"\t.4byte lj_vm_ffi_call\n"
"\t.4byte %d\n"
"\t.byte 0x9f\n\t.uleb128 2*1\n"
"\t.byte 0x90\n\t.uleb128 2*2\n"
"\t.byte 0xd\n\t.uleb128 0x10\n"
"\t.align 2\n"
".LEFDE1:\n\n", (int)ctx->codesz - fcofs);
#endif
#if !LJ_NO_UNWIND
/* NYI */
#endif
break;
default:
break;
}
}