1 |// Low-level VM code for MIPS CPUs.
2 |// Bytecode interpreter, fast functions and helper functions.
3 |// Copyright (C) 2005-2012 Mike Pall. See Copyright Notice in luajit.h
6 |.section code_op, code_sub
8 |.actionlist build_actionlist
10 |.globalnames globnames
11 |.externnames extnames
13 |// Note: The ragged indentation of the instructions is intentional.
14 |// The starting columns indicate data dependencies.
16 |//-----------------------------------------------------------------------
18 |// Fixed register assignments for the interpreter.
19 |// Don't use: r0 = 0, r26/r27 = reserved, r28 = gp, r29 = sp, r31 = ra
21 |// The following must be C callee-save (but BASE is often refetched).
22 |.define BASE, r16 // Base of current Lua stack frame.
23 |.define KBASE, r17 // Constants of current Lua function.
24 |.define PC, r18 // Next PC.
25 |.define DISPATCH, r19 // Opcode dispatch table.
26 |.define LREG, r20 // Register holding lua_State (also in SAVE_L).
27 |.define MULTRES, r21 // Size of multi-result: (nresults+1)*8.
28 |// NYI: r22 currently unused.
30 |.define JGL, r30 // On-trace: global_State + 32768.
32 |// Constants for type-comparisons, stores and conversions. C callee-save.
34 |.define TOBIT, f30 // 2^52 + 2^51.
36 |// The following temporaries are not saved across C calls, except for RA.
37 |.define RA, r23 // Callee-save.
43 |.define AT, r1 // Assembler temporary.
49 |// Calling conventions.
50 |.define CFUNCADDR, r25
65 |// Stack layout while in interpreter. Must match with lj_frame.h.
66 |.define CFRAME_SPACE, 112 // Delta for sp.
68 |.define SAVE_ERRF, 124(sp) // 32 bit C frame info.
69 |.define SAVE_NRES, 120(sp)
70 |.define SAVE_CFRAME, 116(sp)
71 |.define SAVE_L, 112(sp)
72 |//----- 8 byte aligned, ^^^^ 16 byte register save area, owned by interpreter.
73 |.define SAVE_GPR_, 72 // .. 72+10*4: 32 bit GPR saves.
74 |.define SAVE_FPR_, 24 // .. 24+6*8: 64 bit FPR saves.
75 |.define SAVE_PC, 20(sp)
77 |.define CSAVE_4, 12(sp)
78 |.define CSAVE_3, 8(sp)
79 |.define CSAVE_2, 4(sp)
80 |.define CSAVE_1, 0(sp)
81 |//----- 8 byte aligned, ^^^^ 16 byte register save area, owned by callee.
84 |.define SAVE_MULTRES, ARG5
87 | addiu sp, sp, -CFRAME_SPACE
88 | sw ra, SAVE_GPR_+9*4(sp)
89 | sw r30, SAVE_GPR_+8*4(sp)
90 | sdc1 f30, SAVE_FPR_+5*8(sp)
91 | sw r23, SAVE_GPR_+7*4(sp)
92 | sw r22, SAVE_GPR_+6*4(sp)
93 | sdc1 f28, SAVE_FPR_+4*8(sp)
94 | sw r21, SAVE_GPR_+5*4(sp)
95 | sw r20, SAVE_GPR_+4*4(sp)
96 | sdc1 f26, SAVE_FPR_+3*8(sp)
97 | sw r19, SAVE_GPR_+3*4(sp)
98 | sw r18, SAVE_GPR_+2*4(sp)
99 | sdc1 f24, SAVE_FPR_+2*8(sp)
100 | sw r17, SAVE_GPR_+1*4(sp)
101 | sw r16, SAVE_GPR_+0*4(sp)
102 | sdc1 f22, SAVE_FPR_+1*8(sp)
103 | sdc1 f20, SAVE_FPR_+0*8(sp)
106 |.macro restoreregs_ret
107 | lw ra, SAVE_GPR_+9*4(sp)
108 | lw r30, SAVE_GPR_+8*4(sp)
109 | ldc1 f30, SAVE_FPR_+5*8(sp)
110 | lw r23, SAVE_GPR_+7*4(sp)
111 | lw r22, SAVE_GPR_+6*4(sp)
112 | ldc1 f28, SAVE_FPR_+4*8(sp)
113 | lw r21, SAVE_GPR_+5*4(sp)
114 | lw r20, SAVE_GPR_+4*4(sp)
115 | ldc1 f26, SAVE_FPR_+3*8(sp)
116 | lw r19, SAVE_GPR_+3*4(sp)
117 | lw r18, SAVE_GPR_+2*4(sp)
118 | ldc1 f24, SAVE_FPR_+2*8(sp)
119 | lw r17, SAVE_GPR_+1*4(sp)
120 | lw r16, SAVE_GPR_+0*4(sp)
121 | ldc1 f22, SAVE_FPR_+1*8(sp)
122 | ldc1 f20, SAVE_FPR_+0*8(sp)
124 | addiu sp, sp, CFRAME_SPACE
127 |// Type definitions. Some of these are only used for documentation.
128 |.type L, lua_State, LREG
129 |.type GL, global_State
130 |.type TVALUE, TValue
134 |.type LFUNC, GCfuncL
135 |.type CFUNC, GCfuncC
136 |.type PROTO, GCproto
137 |.type UPVAL, GCupval
140 |.type TRACE, GCtrace
142 |//-----------------------------------------------------------------------
144 |// Trap for not-yet-implemented parts.
145 |.macro NYI; .long 0xf0f0f0f0; .endmacro
147 |// Macros to mark delay slots.
148 |.macro ., a; a; .endmacro
149 |.macro ., a,b; a,b; .endmacro
150 |.macro ., a,b,c; a,b,c; .endmacro
152 |//-----------------------------------------------------------------------
154 |// Endian-specific defines.
155 |.define FRAME_PC, LJ_ENDIAN_SELECT(-4,-8)
156 |.define FRAME_FUNC, LJ_ENDIAN_SELECT(-8,-4)
157 |.define HI, LJ_ENDIAN_SELECT(4,0)
158 |.define LO, LJ_ENDIAN_SELECT(0,4)
159 |.define OFS_RD, LJ_ENDIAN_SELECT(2,0)
160 |.define OFS_RA, LJ_ENDIAN_SELECT(1,2)
161 |.define OFS_OP, LJ_ENDIAN_SELECT(0,3)
163 |// Instruction decode.
164 |.macro decode_OP1, dst, ins; andi dst, ins, 0xff; .endmacro
165 |.macro decode_OP4a, dst, ins; andi dst, ins, 0xff; .endmacro
166 |.macro decode_OP4b, dst; sll dst, dst, 2; .endmacro
167 |.macro decode_RC4a, dst, ins; srl dst, ins, 14; .endmacro
168 |.macro decode_RC4b, dst; andi dst, dst, 0x3fc; .endmacro
169 |.macro decode_RD4b, dst; sll dst, dst, 2; .endmacro
170 |.macro decode_RA8a, dst, ins; srl dst, ins, 5; .endmacro
171 |.macro decode_RA8b, dst; andi dst, dst, 0x7f8; .endmacro
172 |.macro decode_RB8a, dst, ins; srl dst, ins, 21; .endmacro
173 |.macro decode_RB8b, dst; andi dst, dst, 0x7f8; .endmacro
174 |.macro decode_RD8a, dst, ins; srl dst, ins, 16; .endmacro
175 |.macro decode_RD8b, dst; sll dst, dst, 3; .endmacro
176 |.macro decode_RDtoRC8, dst, src; andi dst, src, 0x7f8; .endmacro
178 |// Instruction fetch.
183 |// Instruction decode+dispatch.
185 | decode_OP4a TMP1, INS
187 | addu TMP0, DISPATCH, TMP1
188 | decode_RD8a RD, INS
190 | decode_RA8a RA, INS
200 |// Instruction footer.
202 | // Replicated dispatch. Less unpredictable branches, but higher I-Cache use.
203 | .define ins_next, ins_NEXT
204 | .define ins_next_, ins_NEXT
205 | .define ins_next1, ins_NEXT1
206 | .define ins_next2, ins_NEXT2
208 | // Common dispatch. Lower I-Cache use, only one (very) unpredictable branch.
209 | // Affects only certain kinds of benchmarks (and only with -j off).
224 |// Call decode and dispatch.
226 | // BASE = new base, RB = LFUNC/CFUNC, RC = nargs*8, FRAME_PC(BASE) = PC
227 | lw PC, LFUNC:RB->pc
230 | decode_OP4a TMP1, INS
231 | decode_RA8a RA, INS
234 | addu TMP0, DISPATCH, TMP1
241 | // BASE = new base, RB = LFUNC/CFUNC, RC = nargs*8, PC = caller PC
242 | sw PC, FRAME_PC(BASE)
246 |//-----------------------------------------------------------------------
250 | lui AT, (-(BCBIAS_J*4 >> 16) & 65535)
251 | addu TMP0, TMP0, AT
255 |// Assumes DISPATCH is relative to GL.
256 #define DISPATCH_GL(field) (GG_DISP2G + (int)offsetof(global_State, field))
257 #define DISPATCH_J(field) (GG_DISP2J + (int)offsetof(jit_State, field))
258 #define GG_DISP2GOT (GG_OFS(got) - GG_OFS(dispatch))
259 #define DISPATCH_GOT(name) (GG_DISP2GOT + 4*LJ_GOT_##name)
261 #define PC2PROTO(field) ((int)offsetof(GCproto, field)-(int)sizeof(GCproto))
263 |.macro load_got, func
264 | lw CFUNCADDR, DISPATCH_GOT(func)(DISPATCH)
266 |// Much faster. Sadly, there's no easy way to force the required code layout.
267 |// .macro call_intern, func; bal extern func; .endmacro
268 |.macro call_intern, func; jalr CFUNCADDR; .endmacro
269 |.macro call_extern; jalr CFUNCADDR; .endmacro
270 |.macro jmp_extern; jr CFUNCADDR; .endmacro
272 |.macro hotcheck, delta, target
274 | andi TMP1, TMP1, 126
275 | addu TMP1, TMP1, DISPATCH
276 | lhu TMP2, GG_DISP2HOT(TMP1)
277 | addiu TMP2, TMP2, -delta
279 |. sh TMP2, GG_DISP2HOT(TMP1)
283 | hotcheck HOTCOUNT_LOOP, ->vm_hotloop
287 | hotcheck HOTCOUNT_CALL, ->vm_hotcall
290 |// Set current VM state. Uses TMP0.
291 |.macro li_vmstate, st; li TMP0, ~LJ_VMST_..st; .endmacro
292 |.macro st_vmstate; sw TMP0, DISPATCH_GL(vmstate)(DISPATCH); .endmacro
294 |// Move table write barrier back. Overwrites mark and tmp.
295 |.macro barrierback, tab, mark, tmp, target
296 | lw tmp, DISPATCH_GL(gc.grayagain)(DISPATCH)
297 | andi mark, mark, ~LJ_GC_BLACK & 255 // black2gray(tab)
298 | sw tab, DISPATCH_GL(gc.grayagain)(DISPATCH)
299 | sb mark, tab->marked
301 |. sw tmp, tab->gclist
304 |//-----------------------------------------------------------------------
306 /* Generate subroutines used by opcodes and other parts of the VM. */
307 /* The .code_sub section should be last to help static branch prediction. */
308 static void build_subroutines(BuildCtx *ctx)
312 |//-----------------------------------------------------------------------
313 |//-- Return handling ----------------------------------------------------
314 |//-----------------------------------------------------------------------
317 | // See vm_return. Also: TMP2 = previous base.
318 | andi AT, PC, FRAME_P
319 | beqz AT, ->cont_dispatch
322 | // Return from pcall or xpcall fast func.
323 | lw PC, FRAME_PC(TMP2) // Fetch PC of previous frame.
324 | move BASE, TMP2 // Restore caller base.
325 | // Prepending may overwrite the pcall frame, so do it at the end.
326 | sw TMP1, FRAME_PC(RA) // Prepend true to results.
330 | andi TMP0, PC, FRAME_TYPE
331 | addiu RD, RD, 8 // RD = (nresults+1)*8.
332 | beqz TMP0, ->BC_RET_Z // Handle regular return to Lua.
336 | // BASE = base, RA = resultptr, RD/MULTRES = (nresults+1)*8, PC = return
337 | // TMP0 = PC & FRAME_TYPE
339 | xori AT, TMP0, FRAME_C
341 | bnez AT, ->vm_returnp
342 | subu TMP2, BASE, TMP2 // TMP2 = previous base.
348 | addiu BASE, BASE, -8
353 | addiu TMP1, TMP1, -8
358 |. addiu BASE, BASE, 8
363 |. sw BASE, L->top // Store new top.
366 | lw TMP0, SAVE_CFRAME // Restore previous C frame.
367 | move CRET1, r0 // Ok return status for vm_pcall.
374 | lw TMP1, L->maxstack
376 | bnez AT, >7 // Less results wanted?
377 | // More results wanted. Check stack size and fill up results with nil.
378 |. slt AT, BASE, TMP1
381 | sw TISNIL, HI(BASE)
384 |. addiu BASE, BASE, 8
386 |7: // Less results wanted.
387 | subu TMP0, RD, TMP2
388 | subu TMP0, BASE, TMP0 // Either keep top or shrink it.
390 |. movn BASE, TMP0, TMP2 // LUA_MULTRET+1 case?
392 |8: // Corner case: need to grow stack for filling up results.
393 | // This can happen if:
394 | // - A C function grows the stack (a lot).
395 | // - The GC shrinks the stack in between.
396 | // - A return back from a lua_call() with (high) nresults adjustment.
397 | load_got lj_state_growstack
400 | call_intern lj_state_growstack // (lua_State *L, int n)
403 | lw BASE, L->top // Need the (realloced) L->top in BASE.
408 |->vm_unwind_c: // Unwind C stack, return from vm_pcall.
409 | // (void *cframe, int errcode)
412 |->vm_unwind_c_eh: // Landing pad for external unwinder.
414 | li TMP0, ~LJ_VMST_C
415 | lw GL:TMP1, L->glref
417 |. sw TMP0, GL:TMP1->vmstate
419 |->vm_unwind_ff: // Unwind C stack, return from ff pcall.
423 |->vm_unwind_ff_eh: // Landing pad for external unwinder.
425 | lui TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float).
428 | lw DISPATCH, L->glref // Setup pointer to dispatch table.
432 | lw PC, FRAME_PC(BASE) // Fetch PC of previous frame.
433 | cvt.d.s TOBIT, TOBIT
434 | addiu RA, BASE, -8 // Results start at BASE-8.
435 | addiu DISPATCH, DISPATCH, GG_G2DISP
436 | sw TMP1, HI(RA) // Prepend false to error message.
439 |. li RD, 16 // 2 results: false + error message.
441 |//-----------------------------------------------------------------------
442 |//-- Grow stack for calls -----------------------------------------------
443 |//-----------------------------------------------------------------------
445 |->vm_growstack_c: // Grow stack for C function.
447 |. li CARG2, LUA_MINSTACK
449 |->vm_growstack_l: // Grow stack for Lua function.
450 | // BASE = new base, RA = BASE+framesize*8, RC = nargs*8, PC = first PC
454 | addiu PC, PC, 4 // Must point after first instruction.
458 | // L->base = new base, L->top = top
459 | load_got lj_state_growstack
461 | call_intern lj_state_growstack // (lua_State *L, int n)
465 | lw LFUNC:RB, FRAME_FUNC(BASE)
467 | // BASE = new base, RB = LFUNC/CFUNC, RC = nargs*8, FRAME_PC(BASE) = PC
468 | ins_callt // Just retry the call.
470 |//-----------------------------------------------------------------------
471 |//-- Entry points into the assembler VM ---------------------------------
472 |//-----------------------------------------------------------------------
474 |->vm_resume: // Setup C frame and resume thread.
475 | // (lua_State *L, TValue *base, int nres1 = 0, ptrdiff_t ef = 0)
478 | lw DISPATCH, L->glref // Setup pointer to dispatch table.
480 | lbu TMP1, L->status
483 | addiu TMP0, sp, CFRAME_RESUME
484 | addiu DISPATCH, DISPATCH, GG_G2DISP
490 |. sw CARG1, SAVE_PC // Any value outside of bytecode is ok.
492 | // Resume after yield (like a return).
496 | lw PC, FRAME_PC(BASE)
497 | lui TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float).
498 | subu RD, TMP1, BASE
501 | cvt.d.s TOBIT, TOBIT
506 | andi TMP0, PC, FRAME_TYPE
507 | beqz TMP0, ->BC_RET_Z
508 |. li TISNIL, LJ_TNIL
512 |->vm_pcall: // Setup protected C frame and enter VM.
513 | // (lua_State *L, TValue *base, int nres1, ptrdiff_t ef)
515 | sw CARG4, SAVE_ERRF
519 |->vm_call: // Setup C frame and enter VM.
520 | // (lua_State *L, TValue *base, int nres1)
524 |1: // Entry point for vm_pcall above (PC = ftype).
525 | lw TMP1, L:CARG1->cframe
526 | sw CARG3, SAVE_NRES
530 | sw sp, L->cframe // Add our C frame to cframe chain.
531 | lw DISPATCH, L->glref // Setup pointer to dispatch table.
532 | sw CARG1, SAVE_PC // Any value outside of bytecode is ok.
533 | sw TMP1, SAVE_CFRAME
534 | addiu DISPATCH, DISPATCH, GG_G2DISP
536 |3: // Entry point for vm_cpcall/vm_resume (BASE = base, PC = ftype).
537 | lw TMP2, L->base // TMP2 = old base (used in vmeta_call).
538 | lui TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float).
542 | subu NARGS8:RC, TMP1, BASE
543 | subu PC, PC, TMP2 // PC = frame delta + frame type
544 | cvt.d.s TOBIT, TOBIT
550 | // TMP2 = old base, BASE = new base, RC = nargs*8, PC = caller PC
551 | lw TMP0, FRAME_PC(BASE)
553 | bne TMP0, AT, ->vmeta_call
554 |. lw LFUNC:RB, FRAME_FUNC(BASE)
556 |->vm_call_dispatch_f:
558 | // BASE = new base, RB = func, RC = nargs*8, PC = caller PC
560 |->vm_cpcall: // Setup protected C frame, call C.
561 | // (lua_State *L, lua_CFunction func, void *ud, lua_CPFunction cp)
564 | lw TMP0, L:CARG1->stack
567 | sw CARG1, SAVE_PC // Any value outside of bytecode is ok.
568 | subu TMP0, TMP0, TMP1 // Compute -savestack(L, L->top).
570 | sw sp, L->cframe // Add our C frame to cframe chain.
571 | sw TMP0, SAVE_NRES // Neg. delta means cframe w/o frame.
572 | sw r0, SAVE_ERRF // No error function.
573 | move CFUNCADDR, CARG4
574 | jalr CARG4 // (lua_State *L, lua_CFunction func, void *ud)
575 |. sw TMP1, SAVE_CFRAME
577 | lw DISPATCH, L->glref // Setup pointer to dispatch table.
579 | bnez CRET1, <3 // Else continue with the call.
580 |. addiu DISPATCH, DISPATCH, GG_G2DISP
581 | b ->vm_leave_cp // No base? Just remove C frame.
584 |//-----------------------------------------------------------------------
585 |//-- Metamethod handling ------------------------------------------------
586 |//-----------------------------------------------------------------------
588 |// The lj_meta_* functions (except for lj_meta_cat) don't reallocate the
589 |// stack, so BASE doesn't need to be reloaded across these calls.
591 |//-- Continuation dispatch ----------------------------------------------
594 | // BASE = meta base, RA = resultptr, RD = (nresults+1)*8
595 | lw TMP0, -16+LO(BASE) // Continuation.
597 | move BASE, TMP2 // Restore caller BASE.
598 | lw LFUNC:TMP1, FRAME_FUNC(TMP2)
602 | lw PC, -16+HI(RB) // Restore PC from [cont|PC].
604 | lw TMP1, LFUNC:TMP1->pc
608 |. sw TISNIL, -8+HI(TMP2) // Ensure one valid arg.
609 | // BASE = base, RA = resultptr, RB = meta base
610 | jr TMP0 // Jump to continuation.
611 |. lw KBASE, PC2PROTO(k)(TMP1)
615 | bnez TMP0, ->cont_ffi_callback // cont = 1: return from FFI callback.
616 | // cont = 0: tailcall from C function.
617 |. addiu TMP1, RB, -16
619 |. subu RC, TMP1, BASE
622 |->cont_cat: // RA = resultptr, RB = meta base
624 | addiu CARG2, RB, -16
626 | decode_RB8a MULTRES, INS
627 | decode_RA8a RA, INS
628 | decode_RB8b MULTRES
630 | addu TMP1, BASE, MULTRES
632 | subu CARG3, CARG2, TMP1
633 | bne TMP1, CARG2, ->BC_CAT_Z
639 |//-- Table indexing metamethods -----------------------------------------
642 | addiu CARG3, DISPATCH, DISPATCH_GL(tmptv)
644 | sw STR:RC, LO(CARG3)
646 |. sw TMP0, HI(CARG3)
649 | addiu CARG2, DISPATCH, DISPATCH_GL(tmptv)
651 | sw TAB:RB, LO(CARG2)
652 | addiu CARG3, DISPATCH, DISPATCH_GL(tmptv2)
655 | sw STR:RC, LO(CARG3)
657 |. sw TMP1, HI(CARG3)
659 |->vmeta_tgetb: // TMP0 = index
662 | addiu CARG3, DISPATCH, DISPATCH_GL(tmptv)
667 | load_got lj_meta_tget
670 | call_intern lj_meta_tget // (lua_State *L, TValue *o, TValue *k)
672 | // Returns TValue * (finished) or NULL (metamethod).
674 |. addiu TMP1, BASE, -FRAME_CONT
680 |3: // Call __index metamethod.
681 | // BASE = base, L->top = new base, stack = cont/func/t/k
683 | sw PC, -16+HI(BASE) // [cont|PC]
684 | subu PC, BASE, TMP1
685 | lw LFUNC:RB, FRAME_FUNC(BASE) // Guaranteed to be a function here.
686 | b ->vm_call_dispatch_f
687 |. li NARGS8:RC, 16 // 2 args for func(t, k).
689 |//-----------------------------------------------------------------------
692 | addiu CARG3, DISPATCH, DISPATCH_GL(tmptv)
694 | sw STR:RC, LO(CARG3)
696 |. sw TMP0, HI(CARG3)
699 | addiu CARG2, DISPATCH, DISPATCH_GL(tmptv)
701 | sw TAB:RB, LO(CARG2)
702 | addiu CARG3, DISPATCH, DISPATCH_GL(tmptv2)
705 | sw STR:RC, LO(CARG3)
707 |. sw TMP1, HI(CARG3)
709 |->vmeta_tsetb: // TMP0 = index
712 | addiu CARG3, DISPATCH, DISPATCH_GL(tmptv)
717 | load_got lj_meta_tset
720 | call_intern lj_meta_tset // (lua_State *L, TValue *o, TValue *k)
722 | // Returns TValue * (finished) or NULL (metamethod).
725 | // NOBARRIER: lj_meta_tset ensures the table is not black.
730 |3: // Call __newindex metamethod.
731 | // BASE = base, L->top = new base, stack = cont/func/t/k/(v)
732 | addiu TMP1, BASE, -FRAME_CONT
734 | sw PC, -16+HI(BASE) // [cont|PC]
735 | subu PC, BASE, TMP1
736 | lw LFUNC:RB, FRAME_FUNC(BASE) // Guaranteed to be a function here.
737 | sdc1 f0, 16(BASE) // Copy value to third argument.
738 | b ->vm_call_dispatch_f
739 |. li NARGS8:RC, 24 // 3 args for func(t, k, v)
741 |//-- Comparison metamethods ---------------------------------------------
744 | // CARG2, CARG3 are already set by BC_ISLT/BC_ISGE/BC_ISLE/BC_ISGT.
745 | load_got lj_meta_comp
749 | decode_OP1 CARG4, INS
750 | call_intern lj_meta_comp // (lua_State *L, TValue *o1, *o2, int op)
752 | // Returns 0/1 or TValue * (metamethod).
755 | beqz AT, ->vmeta_binop
760 | lui TMP1, (-(BCBIAS_J*4 >> 16) & 65535)
768 |->cont_ra: // RA = resultptr
769 | lbu TMP1, -4+OFS_RA(PC)
772 | addu TMP1, BASE, TMP1
776 |->cont_condt: // RA = resultptr
778 | sltiu AT, TMP0, LJ_TISTRUECOND
780 |. negu TMP2, AT // Branch if result is true.
782 |->cont_condf: // RA = resultptr
784 | sltiu AT, TMP0, LJ_TISTRUECOND
786 |. addiu TMP2, AT, -1 // Branch if result is false.
789 | // CARG2, CARG3, CARG4 are already set by BC_ISEQV/BC_ISNEV.
790 | load_got lj_meta_equal
794 | call_intern lj_meta_equal // (lua_State *L, GCobj *o1, *o2, int ne)
796 | // Returns 0/1 or TValue * (metamethod).
802 | load_got lj_meta_equal_cd
807 | call_intern lj_meta_equal_cd // (lua_State *L, BCIns op)
809 | // Returns 0/1 or TValue * (metamethod).
814 |//-- Arithmetic metamethods ---------------------------------------------
820 | load_got lj_meta_arith
821 | decode_OP1 TMP0, INS
826 | call_intern lj_meta_arith // (lua_State *L, TValue *ra,*rb,*rc, BCReg op)
828 | // Returns NULL (finished) or TValue * (metamethod).
829 | beqz CRET1, ->cont_nop
832 | // Call metamethod for binary op.
834 | // BASE = old base, CRET1 = new base, stack = cont/func/o1/o2
835 | subu TMP1, CRET1, BASE
836 | sw PC, -16+HI(CRET1) // [cont|PC]
838 | addiu PC, TMP1, FRAME_CONT
840 | b ->vm_call_dispatch
841 |. li NARGS8:RC, 16 // 2 args for func(o1, o2).
844 | // CARG2 already set by BC_LEN.
846 | move MULTRES, CARG1
848 | load_got lj_meta_len
851 | call_intern lj_meta_len // (lua_State *L, TValue *o)
853 | // Returns NULL (retry) or TValue * (metamethod base).
855 | bnez CRET1, ->vmeta_binop // Binop call for compatibility.
858 |. move CARG1, MULTRES
860 | b ->vmeta_binop // Binop call for compatibility.
864 |//-- Call metamethod ----------------------------------------------------
866 |->vmeta_call: // Resolve and call __call metamethod.
867 | // TMP2 = old base, BASE = new base, RC = nargs*8
868 | load_got lj_meta_call
869 | sw TMP2, L->base // This is the callers base!
870 | addiu CARG2, BASE, -8
872 | addu CARG3, BASE, RC
873 | move MULTRES, NARGS8:RC
874 | call_intern lj_meta_call // (lua_State *L, TValue *func, TValue *top)
876 | lw LFUNC:RB, FRAME_FUNC(BASE) // Guaranteed to be a function here.
877 | addiu NARGS8:RC, MULTRES, 8 // Got one more argument now.
880 |->vmeta_callt: // Resolve __call for BC_CALLT.
881 | // BASE = old base, RA = new base, RC = nargs*8
882 | load_got lj_meta_call
884 | addiu CARG2, RA, -8
887 | move MULTRES, NARGS8:RC
888 | call_intern lj_meta_call // (lua_State *L, TValue *func, TValue *top)
890 | lw TMP1, FRAME_PC(BASE)
891 | lw LFUNC:RB, FRAME_FUNC(RA) // Guaranteed to be a function here.
893 |. addiu NARGS8:RC, MULTRES, 8 // Got one more argument now.
895 |//-- Argument coercion for 'for' statement ------------------------------
898 | load_got lj_meta_for
903 | call_intern lj_meta_for // (lua_State *L, TValue *base)
906 | decode_OP1 TMP0, MULTRES
909 | decode_RA8a RA, MULTRES
910 | decode_RD8a RD, MULTRES
913 | beq TMP0, AT, =>BC_JFORI
922 |//-----------------------------------------------------------------------
923 |//-- Fast functions -----------------------------------------------------
924 |//-----------------------------------------------------------------------
930 |.macro .ffunc_1, name
932 | beqz NARGS8:RC, ->fff_fallback
933 |. lw CARG3, HI(BASE)
937 |.macro .ffunc_2, name
939 | sltiu AT, NARGS8:RC, 16
941 | bnez AT, ->fff_fallback
942 |. lw CARG4, 8+HI(BASE)
944 | lw CARG2, 8+LO(BASE)
947 |.macro .ffunc_n, name // Caveat: has delay slot!
950 | beqz NARGS8:RC, ->fff_fallback
951 |. ldc1 FARG1, 0(BASE)
952 | sltiu AT, CARG3, LJ_TISNUM
953 | beqz AT, ->fff_fallback
956 |.macro .ffunc_nn, name // Caveat: has delay slot!
958 | sltiu AT, NARGS8:RC, 16
960 | bnez AT, ->fff_fallback
961 |. lw CARG4, 8+HI(BASE)
962 | ldc1 FARG1, 0(BASE)
963 | ldc1 FARG2, 8(BASE)
964 | sltiu TMP0, CARG3, LJ_TISNUM
965 | sltiu TMP1, CARG4, LJ_TISNUM
966 | and TMP0, TMP0, TMP1
967 | beqz TMP0, ->fff_fallback
970 |// Inlined GC threshold check. Caveat: uses TMP0 and TMP1 and has delay slot!
972 | lw TMP0, DISPATCH_GL(gc.total)(DISPATCH)
973 | lw TMP1, DISPATCH_GL(gc.threshold)(DISPATCH)
974 | subu AT, TMP0, TMP1
975 | bgezal AT, ->fff_gcstep
978 |//-- Base library: checks -----------------------------------------------
981 | sltiu AT, CARG3, LJ_TISTRUECOND
982 | beqz AT, ->fff_fallback
983 |. addiu RA, BASE, -8
984 | lw PC, FRAME_PC(BASE)
985 | addiu RD, NARGS8:RC, 8 // Compute (nresults+1)*8.
986 | addu TMP2, RA, NARGS8:RC
988 | addiu TMP1, BASE, 8
989 | beq BASE, TMP2, ->fff_res // Done if exactly 1 argument.
995 |. addiu TMP1, TMP1, 8
1000 | lw CARG3, HI(BASE)
1001 | li TMP1, LJ_TISNUM
1002 | beqz NARGS8:RC, ->fff_fallback
1003 |. sltiu TMP0, CARG3, LJ_TISNUM
1004 | movz TMP1, CARG3, TMP0
1007 | addu TMP1, CFUNC:RB, TMP1
1009 |. ldc1 FRET1, CFUNC:TMP1->upvalue
1011 |//-- Base library: getters and setters ---------------------------------
1013 |.ffunc_1 getmetatable
1017 |1: // Field metatable must be at same offset for GCtab and GCudata!
1018 | lw TAB:CARG1, TAB:CARG1->metatable
1020 | lw STR:RC, DISPATCH_GL(gcroot[GCROOT_MMNAME+MM_metatable])(DISPATCH)
1021 | beqz TAB:CARG1, ->fff_restv
1022 |. li CARG3, LJ_TNIL
1023 | lw TMP0, TAB:CARG1->hmask
1024 | li CARG3, LJ_TTAB // Use metatable as default result.
1025 | lw TMP1, STR:RC->hash
1026 | lw NODE:TMP2, TAB:CARG1->node
1027 | and TMP1, TMP1, TMP0 // idx = str->hash & tab->hmask
1030 | subu TMP1, TMP0, TMP1
1031 | addu NODE:TMP2, NODE:TMP2, TMP1 // node = tab->node + (idx*32-idx*8)
1033 |3: // Rearranged logic, because we expect _not_ to find the key.
1034 | lw CARG4, offsetof(Node, key)+HI(NODE:TMP2)
1035 | lw TMP0, offsetof(Node, key)+LO(NODE:TMP2)
1036 | lw NODE:TMP3, NODE:TMP2->next
1038 |. lw CARG2, offsetof(Node, val)+HI(NODE:TMP2)
1039 | beq TMP0, STR:RC, >5
1040 |. lw TMP1, offsetof(Node, val)+LO(NODE:TMP2)
1042 | beqz NODE:TMP3, ->fff_restv // Not found, keep default result.
1043 |. move NODE:TMP2, NODE:TMP3
1047 | beq CARG2, TISNIL, ->fff_restv // Ditto for nil value.
1049 | move CARG3, CARG2 // Return value of mt.__metatable.
1055 |. sltiu TMP0, CARG3, LJ_TISNUM
1056 | li TMP1, LJ_TISNUM
1057 | movz TMP1, CARG3, TMP0
1060 | addu TMP1, DISPATCH, TMP1
1062 |. lw TAB:CARG1, DISPATCH_GL(gcroot[GCROOT_BASEMT])(TMP1)
1064 |.ffunc_2 setmetatable
1065 | // Fast path: no mt for table yet and not clearing the mt.
1067 | bne CARG3, AT, ->fff_fallback
1068 |. addiu CARG4, CARG4, -LJ_TTAB
1069 | lw TAB:TMP1, TAB:CARG1->metatable
1070 | lbu TMP3, TAB:CARG1->marked
1071 | or AT, CARG4, TAB:TMP1
1072 | bnez AT, ->fff_fallback
1073 |. andi AT, TMP3, LJ_GC_BLACK // isblack(table)
1074 | beqz AT, ->fff_restv
1075 |. sw TAB:CARG2, TAB:CARG1->metatable
1076 | barrierback TAB:CARG1, TMP3, TMP0, ->fff_restv
1079 | lw CARG4, HI(BASE)
1080 | sltiu AT, NARGS8:RC, 16
1081 | lw TAB:CARG2, LO(BASE)
1082 | load_got lj_tab_get
1083 | addiu CARG4, CARG4, -LJ_TTAB
1085 | bnez AT, ->fff_fallback
1086 | addiu CARG3, BASE, 8
1087 | call_intern lj_tab_get // (lua_State *L, GCtab *t, cTValue *key)
1089 | // Returns cTValue *.
1091 |. ldc1 FRET1, 0(CRET1)
1093 |//-- Base library: conversions ------------------------------------------
1096 | // Only handles the number case inline (without a base argument).
1097 | lw CARG1, HI(BASE)
1098 | xori AT, NARGS8:RC, 8
1099 | sltiu CARG1, CARG1, LJ_TISNUM
1100 | movn CARG1, r0, AT
1101 | beqz CARG1, ->fff_fallback // Exactly one number argument.
1102 |. ldc1 FRET1, 0(BASE)
1107 | // Only handles the string or number case inline.
1109 | // A __tostring method in the string base metatable is ignored.
1110 | beq CARG3, AT, ->fff_restv // String key?
1111 | // Handle numbers inline, unless a number base metatable is present.
1112 |. lw TMP1, DISPATCH_GL(gcroot[GCROOT_BASEMT_NUM])(DISPATCH)
1113 | sltiu TMP0, CARG3, LJ_TISNUM
1114 | sltiu TMP1, TMP1, 1
1115 | and TMP0, TMP0, TMP1
1116 | beqz TMP0, ->fff_fallback
1117 |. sw BASE, L->base // Add frame since C call can throw.
1119 |. sw PC, SAVE_PC // Redundant (but a defined value).
1120 | load_got lj_str_fromnum
1122 | call_intern lj_str_fromnum // (lua_State *L, lua_Number *np)
1124 | // Returns GCstr *.
1127 |. move CARG1, CRET1
1129 |//-- Base library: iterators -------------------------------------------
1132 | lw CARG1, HI(BASE)
1133 | lw TAB:CARG2, LO(BASE)
1134 | beqz NARGS8:RC, ->fff_fallback
1135 |. addu TMP2, BASE, NARGS8:RC
1137 | sw TISNIL, HI(TMP2) // Set missing 2nd arg to nil.
1138 | bne CARG1, AT, ->fff_fallback
1139 |. lw PC, FRAME_PC(BASE)
1140 | load_got lj_tab_next
1141 | sw BASE, L->base // Add frame since C call can throw.
1142 | sw BASE, L->top // Dummy frame length is ok.
1143 | addiu CARG3, BASE, 8
1145 | call_intern lj_tab_next // (lua_State *L, GCtab *t, TValue *key)
1147 | // Returns 0 at end of traversal.
1148 | beqz CRET1, ->fff_restv // End of traversal: return nil.
1149 |. li CARG3, LJ_TNIL
1150 | ldc1 f0, 8(BASE) // Copy key and value to results.
1151 | addiu RA, BASE, -8
1160 | bne CARG3, AT, ->fff_fallback
1161 |. lw PC, FRAME_PC(BASE)
1163 | lw TAB:TMP2, TAB:CARG1->metatable
1164 | ldc1 f0, CFUNC:RB->upvalue[0]
1165 | bnez TAB:TMP2, ->fff_fallback
1167 | ldc1 f0, CFUNC:RB->upvalue[0]
1169 |. addiu RA, BASE, -8
1170 | sw TISNIL, 8+HI(BASE)
1176 | sltiu AT, NARGS8:RC, 16
1177 | lw CARG3, HI(BASE)
1178 | lw TAB:CARG1, LO(BASE)
1179 | lw CARG4, 8+HI(BASE)
1180 | bnez AT, ->fff_fallback
1181 |. ldc1 FARG2, 8(BASE)
1182 | addiu CARG3, CARG3, -LJ_TTAB
1183 | sltiu AT, CARG4, LJ_TISNUM
1185 | movn AT, r0, CARG3
1187 | beqz AT, ->fff_fallback
1188 |. lw PC, FRAME_PC(BASE)
1189 | cvt.w.d FRET1, FARG2
1190 | cvt.d.w FARG1, FARG1
1191 | lw TMP0, TAB:CARG1->asize
1192 | lw TMP1, TAB:CARG1->array
1194 | addiu RA, BASE, -8
1195 | add.d FARG2, FARG2, FARG1
1196 | addiu TMP2, TMP2, 1
1197 | sltu AT, TMP2, TMP0
1199 | addu TMP3, TMP1, TMP3
1200 | beqz AT, >2 // Not in array part?
1201 |. sdc1 FARG2, 0(RA)
1205 | beq TMP2, TISNIL, ->fff_res // End of iteration, return 0 results.
1210 |2: // Check for empty hash part first. Otherwise call C function.
1211 | lw TMP0, TAB:CARG1->hmask
1212 | load_got lj_tab_getinth
1213 | beqz TMP0, ->fff_res
1215 | call_intern lj_tab_getinth // (GCtab *t, int32_t key)
1217 | // Returns cTValue * or NULL.
1218 | beqz CRET1, ->fff_res
1220 | lw TMP2, HI(CRET1)
1222 |. ldc1 f0, 0(CRET1)
1226 | bne CARG3, AT, ->fff_fallback
1227 |. lw PC, FRAME_PC(BASE)
1229 | lw TAB:TMP2, TAB:CARG1->metatable
1230 | ldc1 f0, CFUNC:RB->upvalue[0]
1231 | bnez TAB:TMP2, ->fff_fallback
1233 | ldc1 f0, CFUNC:RB->upvalue[0]
1235 |. addiu RA, BASE, -8
1242 |//-- Base library: catch errors ----------------------------------------
1245 | lbu TMP3, DISPATCH_GL(hookmask)(DISPATCH)
1246 | beqz NARGS8:RC, ->fff_fallback
1248 | addiu BASE, BASE, 8
1249 | // Remember active hook before pcall.
1250 | srl TMP3, TMP3, HOOK_ACTIVE_SHIFT
1251 | andi TMP3, TMP3, 1
1252 | addiu PC, TMP3, 8+FRAME_PCALL
1253 | b ->vm_call_dispatch
1254 |. addiu NARGS8:RC, NARGS8:RC, -8
1257 | sltiu AT, NARGS8:RC, 16
1258 | lw CARG4, 8+HI(BASE)
1259 | bnez AT, ->fff_fallback
1260 |. ldc1 FARG2, 8(BASE)
1261 | ldc1 FARG1, 0(BASE)
1262 | lbu TMP1, DISPATCH_GL(hookmask)(DISPATCH)
1265 | bne CARG4, AT, ->fff_fallback // Traceback must be a function.
1266 | addiu BASE, BASE, 16
1267 | // Remember active hook before pcall.
1268 | srl TMP3, TMP3, HOOK_ACTIVE_SHIFT
1269 | sdc1 FARG2, 0(TMP2) // Swap function and traceback.
1270 | andi TMP3, TMP3, 1
1271 | sdc1 FARG1, 8(TMP2)
1272 | addiu PC, TMP3, 16+FRAME_PCALL
1273 | b ->vm_call_dispatch
1274 |. addiu NARGS8:RC, NARGS8:RC, -16
1276 |//-- Coroutine library --------------------------------------------------
1278 |.macro coroutine_resume_wrap, resume
1280 |.ffunc_1 coroutine_resume
1282 | bne CARG3, AT, ->fff_fallback
1284 |.ffunc coroutine_wrap_aux
1285 | lw L:CARG1, CFUNC:RB->upvalue[0].gcr
1287 | lbu TMP0, L:CARG1->status
1288 | lw TMP1, L:CARG1->cframe
1289 | lw CARG2, L:CARG1->top
1290 | lw TMP2, L:CARG1->base
1291 | addiu TMP3, TMP0, -LUA_YIELD
1292 | bgtz TMP3, ->fff_fallback // st > LUA_YIELD?
1293 |. xor TMP2, TMP2, CARG2
1294 | bnez TMP1, ->fff_fallback // cframe != 0?
1295 |. or AT, TMP2, TMP0
1296 | lw TMP0, L:CARG1->maxstack
1297 | beqz AT, ->fff_fallback // base == top && st == 0?
1298 |. lw PC, FRAME_PC(BASE)
1299 | addu TMP2, CARG2, NARGS8:RC
1300 | sltu AT, TMP0, TMP2
1301 | bnez AT, ->fff_fallback // Stack overflow?
1306 | addiu BASE, BASE, 8 // Keep resumed thread in stack for GC.
1307 | addiu NARGS8:RC, NARGS8:RC, -8
1308 | addiu TMP2, TMP2, -8
1310 | sw TMP2, L:CARG1->top
1311 | addu TMP1, BASE, NARGS8:RC
1314 |2: // Move args to coroutine.
1316 | sltu AT, BASE, TMP1
1318 |. addiu BASE, BASE, 8
1321 |. addiu CARG3, CARG3, 8
1323 | bal ->vm_resume // (lua_State *L, TValue *base, 0, 0)
1324 |. move L:RA, L:CARG1
1325 | // Returns thread status.
1327 | lw TMP2, L:RA->base
1328 | sltiu AT, CRET1, LUA_YIELD+1
1329 | lw TMP3, L:RA->top
1334 |. subu RD, TMP3, TMP2
1335 | lw TMP0, L->maxstack
1336 | beqz RD, >6 // No results?
1337 |. addu TMP1, BASE, RD
1338 | sltu AT, TMP0, TMP1
1339 | bnez AT, >9 // Need to grow stack?
1340 |. addu TMP3, TMP2, RD
1341 | sw TMP2, L:RA->top // Clear coroutine stack.
1343 |5: // Move results from coroutine.
1345 | addiu TMP2, TMP2, 8
1346 | sltu AT, TMP2, TMP3
1349 |. addiu TMP1, TMP1, 8
1351 | andi TMP0, PC, FRAME_TYPE
1354 | addiu RA, BASE, -8
1355 | sw TMP1, -8+HI(BASE) // Prepend true to results.
1363 | beqz TMP0, ->BC_RET_Z
1368 |8: // Coroutine returned with error (at co->top-1).
1370 | addiu TMP3, TMP3, -8
1371 | li TMP1, LJ_TFALSE
1373 | sw TMP3, L:RA->top // Remove error from coroutine stack.
1375 | sw TMP1, -8+HI(BASE) // Prepend false to results.
1376 | addiu RA, BASE, -8
1377 | sdc1 f0, 0(BASE) // Copy error message.
1379 |. andi TMP0, PC, FRAME_TYPE
1381 | load_got lj_ffh_coroutine_wrap_err
1383 | call_intern lj_ffh_coroutine_wrap_err // (lua_State *L, lua_State *co)
1387 |9: // Handle stack expansion on return from yield.
1388 | load_got lj_state_growstack
1390 | call_intern lj_state_growstack // (lua_State *L, int n)
1396 | coroutine_resume_wrap 1 // coroutine.resume
1397 | coroutine_resume_wrap 0 // coroutine.wrap
1399 |.ffunc coroutine_yield
1400 | lw TMP0, L->cframe
1401 | addu TMP1, BASE, NARGS8:RC
1403 | andi TMP0, TMP0, CFRAME_RESUME
1405 | beqz TMP0, ->fff_fallback
1406 |. li CRET1, LUA_YIELD
1409 |. sb CRET1, L->status
1411 |//-- Math library -------------------------------------------------------
1414 |. abs.d FRET1, FARG1
1416 | lw PC, FRAME_PC(BASE)
1417 | addiu RA, BASE, -8
1419 |. sdc1 FRET1, -8(BASE)
1422 | // CARG3/CARG1 = TValue result.
1423 | lw PC, FRAME_PC(BASE)
1424 | sw CARG3, -8+HI(BASE)
1425 | addiu RA, BASE, -8
1426 | sw CARG1, -8+LO(BASE)
1428 | // RA = results, PC = return.
1431 | // RA = results, RD = (nresults+1)*8, PC = return.
1432 | andi TMP0, PC, FRAME_TYPE
1433 | bnez TMP0, ->vm_return
1436 | decode_RB8a RB, INS
1440 | bnez AT, >6 // More results expected?
1441 |. decode_RA8a TMP0, INS
1444 | // Adjust BASE. KBASE is assumed to be set for the calling frame.
1445 | subu BASE, RA, TMP0
1448 |6: // Fill up results with nil.
1452 |. sw TISNIL, -8+HI(TMP1)
1454 |.macro math_extern, func
1455 |->ff_math_ .. func:
1456 | lw CARG3, HI(BASE)
1457 | beqz NARGS8:RC, ->fff_fallback
1459 | sltiu AT, CARG3, LJ_TISNUM
1460 | beqz AT, ->fff_fallback
1463 |. ldc1 FARG1, 0(BASE)
1468 |.macro math_extern2, func
1469 | .ffunc_nn math_ .. func
1477 |.macro math_round, func
1478 | .ffunc_n math_ .. func
1502 | math_extern2 atan2
1506 |. sqrt.d FRET1, FARG1
1512 |. ldc1 FARG2, CFUNC:RB->upvalue[0]
1514 |. mul.d FRET1, FARG1, FARG2
1516 |.ffunc_nn math_ldexp
1517 | cvt.w.d FARG2, FARG2
1525 |.ffunc_n math_frexp
1527 | lw PC, FRAME_PC(BASE)
1529 |. addiu CARG3, DISPATCH, DISPATCH_GL(tmptv)
1530 | lw TMP1, DISPATCH_GL(tmptv)(DISPATCH)
1531 | addiu RA, BASE, -8
1534 | cvt.d.w FARG2, FARG2
1541 | lw PC, FRAME_PC(BASE)
1543 |. addiu CARG3, BASE, -8
1544 | addiu RA, BASE, -8
1545 | sdc1 FRET1, 0(BASE)
1549 |.macro math_minmax, name, ismax
1551 | lw CARG3, HI(BASE)
1552 | beqz NARGS8:RC, ->fff_fallback
1553 |. ldc1 FRET1, 0(BASE)
1554 | sltiu AT, CARG3, LJ_TISNUM
1555 | beqz AT, ->fff_fallback
1556 |. addu TMP2, BASE, NARGS8:RC
1557 | addiu TMP1, BASE, 8
1558 | beq TMP1, TMP2, ->fff_resn
1560 |. lw CARG3, HI(TMP1)
1561 | ldc1 FARG1, 0(TMP1)
1562 | addiu TMP1, TMP1, 8
1563 | sltiu AT, CARG3, LJ_TISNUM
1564 | beqz AT, ->fff_fallback
1566 |. c.olt.d FARG1, FRET1
1568 |. c.olt.d FRET1, FARG1
1570 | bne TMP1, TMP2, <1
1571 |. movf.d FRET1, FARG1
1576 | math_minmax math_min, 0
1577 | math_minmax math_max, 1
1579 |//-- String library -----------------------------------------------------
1581 |.ffunc_1 string_len
1583 | bne CARG3, AT, ->fff_fallback
1586 |. lw CRET1, STR:CARG1->len
1588 |.ffunc string_byte // Only handle the 1-arg case here.
1589 | lw CARG3, HI(BASE)
1590 | lw STR:CARG1, LO(BASE)
1591 | xori AT, NARGS8:RC, 8
1592 | addiu CARG3, CARG3, -LJ_TSTR
1594 | bnez AT, ->fff_fallback // Need exactly 1 string argument.
1596 | lw TMP0, STR:CARG1->len
1597 | lbu TMP1, STR:CARG1[1] // Access is always ok (NUL at end).
1598 | addiu RA, BASE, -8
1603 | lw PC, FRAME_PC(BASE)
1604 | sll RD, RD, 3 // RD = ((str->len != 0)+1)*8
1608 |.ffunc string_char // Only handle the 1-arg case here.
1610 | lw CARG3, HI(BASE)
1611 | ldc1 FARG1, 0(BASE)
1613 | bne NARGS8:RC, AT, ->fff_fallback // Exactly 1 argument.
1614 |. sltiu AT, CARG3, LJ_TISNUM
1615 | beqz AT, ->fff_fallback
1617 | cvt.w.d FARG1, FARG1
1618 | addiu CARG2, sp, ARG5_OFS
1619 | sltiu AT, TMP0, 256
1621 | beqz AT, ->fff_fallback
1624 | load_got lj_str_new
1627 | call_intern lj_str_new // (lua_State *L, char *str, size_t l)
1629 | // Returns GCstr *.
1633 |. li CARG3, LJ_TSTR
1637 | addiu AT, NARGS8:RC, -16
1638 | lw CARG3, 16+HI(BASE)
1641 | lw STR:CARG1, LO(BASE)
1642 | bltz AT, ->fff_fallback
1643 | lw CARG2, 8+HI(BASE)
1648 | sltiu AT, CARG3, LJ_TISNUM
1649 | beqz AT, ->fff_fallback
1652 | sltiu AT, CARG2, LJ_TISNUM
1653 | beqz AT, ->fff_fallback
1656 | bne TMP0, AT, ->fff_fallback
1657 |. lw CARG2, STR:CARG1->len
1659 | // STR:CARG1 = str, CARG2 = str->len, CARG3 = start, CARG4 = end
1661 | addiu TMP0, CARG2, 1
1662 | addu TMP1, CARG4, TMP0
1663 | slt TMP3, CARG3, r0
1664 | movn CARG4, TMP1, AT // if (end < 0) end += len+1
1665 | addu TMP1, CARG3, TMP0
1666 | movn CARG3, TMP1, TMP3 // if (start < 0) start += len+1
1669 | slt TMP3, r0, CARG3
1670 | movn CARG4, r0, AT // if (end < 0) end = 0
1671 | movz CARG3, TMP2, TMP3 // if (start < 1) start = 1
1672 | slt AT, CARG2, CARG4
1673 | movn CARG4, CARG2, AT // if (end > len) end = len
1674 | addu CARG2, STR:CARG1, CARG3
1675 | subu CARG3, CARG4, CARG3 // len = end - start
1676 | addiu CARG2, CARG2, sizeof(GCstr)-1
1677 | bgez CARG3, ->fff_newstr
1678 |. addiu CARG3, CARG3, 1 // len++
1679 |->fff_emptystr: // Return empty string.
1680 | addiu STR:CARG1, DISPATCH, DISPATCH_GL(strempty)
1682 |. li CARG3, LJ_TSTR
1684 |.ffunc string_rep // Only handle the 1-char case inline.
1687 | sltiu AT, NARGS8:RC, 16
1688 | lw CARG4, 8+HI(BASE)
1689 | lw STR:CARG1, LO(BASE)
1690 | addiu TMP0, TMP0, -LJ_TSTR
1693 | bnez AT, ->fff_fallback
1694 |. sltiu AT, CARG4, LJ_TISNUM
1696 | beqz AT, ->fff_fallback
1697 |. lw TMP0, STR:CARG1->len
1699 | lw TMP1, DISPATCH_GL(tmpbuf.sz)(DISPATCH)
1701 | blez CARG3, ->fff_emptystr // Count <= 0?
1702 |. sltu AT, AT, TMP0
1703 | beqz TMP0, ->fff_emptystr // Zero length string?
1704 |. sltu TMP0, TMP1, CARG3
1706 | lw CARG2, DISPATCH_GL(tmpbuf.buf)(DISPATCH)
1707 | bnez AT, ->fff_fallback // Fallback for > 1-char strings.
1708 |. lbu TMP0, STR:CARG1[1]
1709 | addu TMP2, CARG2, CARG3
1710 |1: // Fill buffer with char. Yes, this is suboptimal code (do you care?).
1711 | addiu TMP2, TMP2, -1
1712 | sltu AT, CARG2, TMP2
1718 |.ffunc string_reverse
1720 | lw CARG3, HI(BASE)
1721 | lw STR:CARG1, LO(BASE)
1722 | beqz NARGS8:RC, ->fff_fallback
1724 | bne CARG3, AT, ->fff_fallback
1725 |. lw TMP1, DISPATCH_GL(tmpbuf.sz)(DISPATCH)
1726 | lw CARG3, STR:CARG1->len
1727 | addiu CARG1, STR:CARG1, #STR
1728 | lw CARG2, DISPATCH_GL(tmpbuf.buf)(DISPATCH)
1729 | sltu AT, TMP1, CARG3
1730 | bnez AT, ->fff_fallback
1731 |. addu TMP3, CARG1, CARG3
1732 | addu CARG4, CARG2, CARG3
1733 |1: // Reverse string copy.
1734 | lbu TMP1, 0(CARG1)
1735 | sltu AT, CARG1, TMP3
1736 | beqz AT, ->fff_newstr
1737 |. addiu CARG1, CARG1, 1
1738 | addiu CARG4, CARG4, -1
1742 |.macro ffstring_case, name, lo
1745 | lw CARG3, HI(BASE)
1746 | lw STR:CARG1, LO(BASE)
1747 | beqz NARGS8:RC, ->fff_fallback
1749 | bne CARG3, AT, ->fff_fallback
1750 |. lw TMP1, DISPATCH_GL(tmpbuf.sz)(DISPATCH)
1751 | lw CARG3, STR:CARG1->len
1752 | addiu CARG1, STR:CARG1, #STR
1753 | lw CARG2, DISPATCH_GL(tmpbuf.buf)(DISPATCH)
1754 | sltu AT, TMP1, CARG3
1755 | bnez AT, ->fff_fallback
1756 |. addu TMP3, CARG1, CARG3
1758 |1: // ASCII case conversion.
1759 | lbu TMP1, 0(CARG1)
1760 | sltu AT, CARG1, TMP3
1761 | beqz AT, ->fff_newstr
1762 |. addiu TMP0, TMP1, -lo
1763 | xori TMP2, TMP1, 0x20
1764 | sltiu AT, TMP0, 26
1765 | movn TMP1, TMP2, AT
1766 | addiu CARG1, CARG1, 1
1769 |. addiu CARG4, CARG4, 1
1772 |ffstring_case string_lower, 65
1773 |ffstring_case string_upper, 97
1775 |//-- Table library ------------------------------------------------------
1777 |.ffunc_1 table_getn
1779 | bne CARG3, AT, ->fff_fallback
1780 |. load_got lj_tab_len
1781 | call_intern lj_tab_len // (GCtab *t)
1783 | // Returns uint32_t (but less than 2^31).
1787 |//-- Bit library --------------------------------------------------------
1789 |.macro .ffunc_bit, name
1790 | .ffunc_n bit_..name
1791 |. add.d FARG1, FARG1, TOBIT
1795 |.macro .ffunc_bit_op, name, ins
1797 | addiu TMP1, BASE, 8
1798 | addu TMP2, BASE, NARGS8:RC
1800 | lw CARG4, HI(TMP1)
1801 | beq TMP1, TMP2, ->fff_resi
1802 |. ldc1 FARG1, 0(TMP1)
1803 | sltiu AT, CARG4, LJ_TISNUM
1804 | beqz AT, ->fff_fallback
1805 | add.d FARG1, FARG1, TOBIT
1807 | ins CRET1, CRET1, CARG2
1809 |. addiu TMP1, TMP1, 8
1812 |.ffunc_bit_op band, and
1813 |.ffunc_bit_op bor, or
1814 |.ffunc_bit_op bxor, xor
1817 | srl TMP0, CRET1, 24
1818 | srl TMP2, CRET1, 8
1819 | sll TMP1, CRET1, 24
1820 | andi TMP2, TMP2, 0xff00
1821 | or TMP0, TMP0, TMP1
1822 | andi CRET1, CRET1, 0xff00
1823 | or TMP0, TMP0, TMP2
1824 | sll CRET1, CRET1, 8
1826 |. or CRET1, TMP0, CRET1
1832 |.macro .ffunc_bit_sh, name, ins, shmod
1833 | .ffunc_nn bit_..name
1834 |. add.d FARG1, FARG1, TOBIT
1835 | add.d FARG2, FARG2, TOBIT
1840 | subu TMP0, AT, CARG2
1841 | sllv CARG2, CARG1, CARG2
1842 | srlv CARG1, CARG1, TMP0
1845 | subu TMP0, AT, CARG2
1846 | srlv CARG2, CARG1, CARG2
1847 | sllv CARG1, CARG1, TMP0
1850 |. ins CRET1, CARG1, CARG2
1853 |.ffunc_bit_sh lshift, sllv, 0
1854 |.ffunc_bit_sh rshift, srlv, 0
1855 |.ffunc_bit_sh arshift, srav, 0
1856 |// Can't use rotrv, since it's only in MIPS32R2.
1857 |.ffunc_bit_sh rol, or, 1
1858 |.ffunc_bit_sh ror, or, 2
1864 |. cvt.d.w FRET1, FRET1
1866 |//-----------------------------------------------------------------------
1868 |->fff_fallback: // Call fast function fallback handler.
1869 | // BASE = new base, RB = CFUNC, RC = nargs*8
1870 | lw TMP3, CFUNC:RB->f
1871 | addu TMP1, BASE, NARGS8:RC
1872 | lw PC, FRAME_PC(BASE) // Fallback may overwrite PC.
1873 | addiu TMP0, TMP1, 8*LUA_MINSTACK
1874 | lw TMP2, L->maxstack
1875 | sw PC, SAVE_PC // Redundant (but a defined value).
1876 | sltu AT, TMP2, TMP0
1879 | bnez AT, >5 // Need to grow stack.
1880 |. move CFUNCADDR, TMP3
1881 | jalr TMP3 // (lua_State *L)
1883 | // Either throws an error, or recovers and returns -1, 0 or nresults+1.
1886 | bgtz CRET1, ->fff_res // Returned nresults+1?
1887 |. addiu RA, BASE, -8
1888 |1: // Returned 0 or -1: retry fast path.
1890 | lw LFUNC:RB, FRAME_FUNC(BASE)
1891 | bnez CRET1, ->vm_call_tail // Returned -1?
1892 |. subu NARGS8:RC, TMP0, BASE
1893 | ins_callt // Returned 0: retry fast path.
1895 |// Reconstruct previous base for vmeta_call during tailcall.
1897 | andi TMP0, PC, FRAME_TYPE
1901 | lbu TMP1, OFS_RA(PC)
1903 | addiu TMP1, TMP1, 8
1905 | b ->vm_call_dispatch // Resolve again for tailcall.
1906 |. subu TMP2, BASE, TMP1
1908 |5: // Grow stack for fallback handler.
1909 | load_got lj_state_growstack
1910 | li CARG2, LUA_MINSTACK
1911 | call_intern lj_state_growstack // (lua_State *L, int n)
1915 |. li CRET1, 0 // Force retry.
1917 |->fff_gcstep: // Call GC step function.
1918 | // BASE = new base, RC = nargs*8
1920 | load_got lj_gc_step
1922 | addu TMP0, BASE, NARGS8:RC
1923 | sw PC, SAVE_PC // Redundant (but a defined value).
1925 | call_intern lj_gc_step // (lua_State *L)
1930 | lw CFUNC:RB, FRAME_FUNC(BASE)
1932 |. subu NARGS8:RC, TMP0, BASE
1934 |//-----------------------------------------------------------------------
1935 |//-- Special dispatch targets -------------------------------------------
1936 |//-----------------------------------------------------------------------
1938 |->vm_record: // Dispatch target for recording phase.
1940 | lbu TMP3, DISPATCH_GL(hookmask)(DISPATCH)
1941 | andi AT, TMP3, HOOK_VMEVENT // No recording while in vmevent.
1943 | // Decrement the hookcount for consistency, but always do the call.
1944 |. lw TMP2, DISPATCH_GL(hookcount)(DISPATCH)
1945 | andi AT, TMP3, HOOK_ACTIVE
1947 |. addiu TMP2, TMP2, -1
1948 | andi AT, TMP3, LUA_MASKLINE|LUA_MASKCOUNT
1952 |. sw TMP2, DISPATCH_GL(hookcount)(DISPATCH)
1955 |->vm_rethook: // Dispatch target for return hooks.
1956 | lbu TMP3, DISPATCH_GL(hookmask)(DISPATCH)
1957 | andi AT, TMP3, HOOK_ACTIVE // Hook already active?
1959 |5: // Re-dispatch to static ins.
1960 |. lw AT, GG_DISP2STATIC(TMP0) // Assumes TMP0 holds DISPATCH+OP*4.
1964 |->vm_inshook: // Dispatch target for instr/line hooks.
1965 | lbu TMP3, DISPATCH_GL(hookmask)(DISPATCH)
1966 | lw TMP2, DISPATCH_GL(hookcount)(DISPATCH)
1967 | andi AT, TMP3, HOOK_ACTIVE // Hook already active?
1969 |. andi AT, TMP3, LUA_MASKLINE|LUA_MASKCOUNT
1971 |. addiu TMP2, TMP2, -1
1973 |. sw TMP2, DISPATCH_GL(hookcount)(DISPATCH)
1974 | andi AT, TMP3, LUA_MASKLINE
1977 |. load_got lj_dispatch_ins
1978 | sw MULTRES, SAVE_MULTRES
1981 | // SAVE_PC must hold the _previous_ PC. The callee updates it with PC.
1982 | call_intern lj_dispatch_ins // (lua_State *L, const BCIns *pc)
1986 |4: // Re-dispatch to static ins.
1988 | decode_OP4a TMP1, INS
1990 | addu TMP0, DISPATCH, TMP1
1991 | decode_RD8a RD, INS
1992 | lw AT, GG_DISP2STATIC(TMP0)
1993 | decode_RA8a RA, INS
1998 |->cont_hook: // Continue from hook yield.
2001 |. lw MULTRES, -24+LO(RB) // Restore MULTRES for *M ins.
2003 |->vm_hotloop: // Hot loop counter underflow.
2005 | lw LFUNC:TMP1, FRAME_FUNC(BASE)
2006 | addiu CARG1, DISPATCH, GG_DISP2J
2008 | lw TMP1, LFUNC:TMP1->pc
2010 | sw L, DISPATCH_J(L)(DISPATCH)
2011 | lbu TMP1, PC2PROTO(framesize)(TMP1)
2012 | load_got lj_trace_hot
2015 | addu TMP1, BASE, TMP1
2016 | call_intern lj_trace_hot // (jit_State *J, const BCIns *pc)
2022 |->vm_callhook: // Dispatch target for call hooks.
2028 |->vm_hotcall: // Hot call counter underflow.
2033 | load_got lj_dispatch_call
2034 | addu TMP0, BASE, RC
2039 | call_intern lj_dispatch_call // (lua_State *L, const BCIns *pc)
2041 | // Returns ASMFunction.
2044 | sw r0, SAVE_PC // Invalidate for subsequent line hook.
2045 | subu NARGS8:RC, TMP0, BASE
2047 | lw LFUNC:RB, FRAME_FUNC(BASE)
2051 |//-----------------------------------------------------------------------
2052 |//-- Trace exit handler -------------------------------------------------
2053 |//-----------------------------------------------------------------------
2055 |.macro savex_, a, b
2056 | sdc1 f..a, 16+a*8(sp)
2057 | sw r..a, 16+32*8+a*4(sp)
2058 | sw r..b, 16+32*8+b*4(sp)
2063 | addiu sp, sp, -(16+32*8+32*4)
2078 | sdc1 f28, 16+28*8(sp)
2079 | sw r28, 16+32*8+28*4(sp)
2080 | sdc1 f30, 16+30*8(sp)
2081 | sw r30, 16+32*8+30*4(sp)
2082 | sw r0, 16+32*8+31*4(sp) // Clear RID_TMP.
2084 | addiu TMP2, sp, 16+32*8+32*4 // Recompute original value of sp.
2085 | addiu DISPATCH, JGL, -GG_DISP2G-32768
2086 | lw TMP1, 0(TMP2) // Load exit number.
2088 | sw TMP2, 16+32*8+29*4(sp) // Store sp in RID_SP.
2089 | lw L, DISPATCH_GL(jit_L)(DISPATCH)
2090 | lw BASE, DISPATCH_GL(jit_base)(DISPATCH)
2091 | load_got lj_trace_exit
2092 | sw L, DISPATCH_J(L)(DISPATCH)
2093 | sw ra, DISPATCH_J(parent)(DISPATCH) // Store trace number.
2094 | sw TMP1, DISPATCH_J(exitno)(DISPATCH) // Store exit number.
2095 | addiu CARG1, DISPATCH, GG_DISP2J
2097 | call_intern lj_trace_exit // (jit_State *J, ExitState *ex)
2098 |. addiu CARG2, sp, 16
2099 | // Returns MULTRES (unscaled) or negated error code.
2100 | lw TMP1, L->cframe
2104 | lw PC, SAVE_PC // Get SAVE_PC.
2106 |. sw L, SAVE_L // Set SAVE_L (on-trace resume/yield).
2110 | // CRET1 = MULTRES or negated error code, BASE, PC and JGL set.
2112 | addiu DISPATCH, JGL, -GG_DISP2G-32768
2114 | bltz CRET1, >3 // Check for error from exit.
2115 |. lw LFUNC:TMP1, FRAME_FUNC(BASE)
2116 | lui TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float).
2117 | sll MULTRES, CRET1, 3
2118 | li TISNIL, LJ_TNIL
2119 | sw MULTRES, SAVE_MULTRES
2121 | lw TMP1, LFUNC:TMP1->pc
2122 | sw r0, DISPATCH_GL(jit_L)(DISPATCH)
2123 | lw KBASE, PC2PROTO(k)(TMP1)
2124 | cvt.d.s TOBIT, TOBIT
2125 | // Modified copy of ins_next which handles function header dispatch, too.
2128 | // Assumes TISNIL == ~LJ_VMST_INTERP == -1
2129 | sw TISNIL, DISPATCH_GL(vmstate)(DISPATCH)
2130 | decode_OP4a TMP1, INS
2132 | sltiu TMP2, TMP1, BC_FUNCF*4 // Function header?
2133 | addu TMP0, DISPATCH, TMP1
2134 | decode_RD8a RD, INS
2136 | decode_RA8a RA, INS
2142 | addiu RC, MULTRES, -8
2146 |3: // Rethrow error from the right C frame.
2147 | load_got lj_err_throw
2149 | call_intern lj_err_throw // (lua_State *L, int errcode)
2153 |//-----------------------------------------------------------------------
2154 |//-- Math helper functions ----------------------------------------------
2155 |//-----------------------------------------------------------------------
2157 |// Modifies AT, TMP0, FRET1, FRET2, f4. Keeps all others incl. FARG1.
2158 |.macro vm_round, func
2159 | lui TMP0, 0x4330 // Hiword of 2^52 (double).
2162 | abs.d FRET2, FARG1 // |x|
2164 | c.olt.d 0, FRET2, f4
2165 | add.d FRET1, FRET2, f4 // (|x| + 2^52) - 2^52
2166 | bc1f 0, >1 // Truncate only if |x| < 2^52.
2167 |. sub.d FRET1, FRET1, f4
2169 |.if "func" == "ceil"
2170 | lui TMP0, 0xbff0 // Hiword of -1 (double). Preserves -0.
2172 | lui TMP0, 0x3ff0 // Hiword of +1 (double).
2174 |.if "func" == "trunc"
2176 | c.olt.d 0, FRET2, FRET1 // |x| < result?
2177 | sub.d FRET2, FRET1, f4
2178 | movt.d FRET1, FRET2, 0 // If yes, subtract +1.
2179 | neg.d FRET2, FRET1
2181 |. movn.d FRET1, FRET2, AT // Merge sign bit back in.
2183 | neg.d FRET2, FRET1
2185 | movn.d FRET1, FRET2, AT // Merge sign bit back in.
2186 |.if "func" == "ceil"
2187 | c.olt.d 0, FRET1, FARG1 // x > result?
2189 | c.olt.d 0, FARG1, FRET1 // x < result?
2191 | sub.d FRET2, FRET1, f4 // If yes, subtract +-1.
2193 |. movt.d FRET1, FRET2, 0
2197 |. mov.d FRET1, FARG1
2209 |//-----------------------------------------------------------------------
2210 |//-- Miscellaneous functions --------------------------------------------
2211 |//-----------------------------------------------------------------------
2213 |//-----------------------------------------------------------------------
2214 |//-- FFI helper functions -----------------------------------------------
2215 |//-----------------------------------------------------------------------
2217 |// Handler for callback functions. Callback slot number in r1, g in r2.
2220 |.type CTSTATE, CTState, PC
2222 | lw CTSTATE, GL:r2->ctype_state
2223 | addiu DISPATCH, r2, GG_G2DISP
2224 | load_got lj_ccallback_enter
2225 | sw r1, CTSTATE->cb.slot
2226 | sw CARG1, CTSTATE->cb.gpr[0]
2227 | sw CARG2, CTSTATE->cb.gpr[1]
2228 | sdc1 FARG1, CTSTATE->cb.fpr[0]
2229 | sw CARG3, CTSTATE->cb.gpr[2]
2230 | sw CARG4, CTSTATE->cb.gpr[3]
2231 | sdc1 FARG2, CTSTATE->cb.fpr[1]
2232 | addiu TMP0, sp, CFRAME_SPACE+16
2233 | sw TMP0, CTSTATE->cb.stack
2234 | sw r0, SAVE_PC // Any value outside of bytecode is ok.
2236 | call_intern lj_ccallback_enter // (CTState *cts, void *cf)
2237 |. move CARG1, CTSTATE
2238 | // Returns lua_State *.
2239 | lw BASE, L:CRET1->base
2240 | lw RC, L:CRET1->top
2242 | lui TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float).
2243 | lw LFUNC:RB, FRAME_FUNC(BASE)
2246 | li TISNIL, LJ_TNIL
2249 | cvt.d.s TOBIT, TOBIT
2253 |->cont_ffi_callback: // Return from FFI callback.
2255 | load_got lj_ccallback_leave
2256 | lw CTSTATE, DISPATCH_GL(ctype_state)(DISPATCH)
2261 | call_intern lj_ccallback_leave // (CTState *cts, TValue *o)
2262 |. move CARG1, CTSTATE
2263 | lw CRET1, CTSTATE->cb.gpr[0]
2264 | ldc1 FRET1, CTSTATE->cb.fpr[0]
2265 | lw CRET2, CTSTATE->cb.gpr[1]
2267 |. ldc1 FRET2, CTSTATE->cb.fpr[1]
2270 |->vm_ffi_call: // Call C function via FFI.
2271 | // Caveat: needs special frame unwinding, see below.
2273 | .type CCSTATE, CCallState, CARG1
2274 | lw TMP1, CCSTATE->spadj
2275 | lbu CARG2, CCSTATE->nsp
2279 | sll CARG2, CARG2, 2
2281 | sw CCSTATE, -12(TMP2)
2283 | addiu TMP1, CCSTATE, offsetof(CCallState, stack)
2284 | addiu TMP2, sp, 16
2286 |. addu TMP3, TMP1, CARG2
2289 | addiu TMP1, TMP1, 4
2290 | sltu AT, TMP1, TMP3
2293 |. addiu TMP2, TMP2, 4
2295 | lw CFUNCADDR, CCSTATE->func
2296 | lw CARG2, CCSTATE->gpr[1]
2297 | lw CARG3, CCSTATE->gpr[2]
2298 | lw CARG4, CCSTATE->gpr[3]
2299 | ldc1 FARG1, CCSTATE->fpr[0]
2300 | ldc1 FARG2, CCSTATE->fpr[1]
2302 |. lw CARG1, CCSTATE->gpr[0] // Do this last, since CCSTATE is CARG1.
2303 | lw CCSTATE:TMP1, -12(r16)
2306 | sw CRET1, CCSTATE:TMP1->gpr[0]
2307 | sw CRET2, CCSTATE:TMP1->gpr[1]
2308 | sdc1 FRET1, CCSTATE:TMP1->fpr[0]
2309 | sdc1 FRET2, CCSTATE:TMP1->fpr[1]
2314 |// Note: vm_ffi_call must be the last function in this object file!
2316 |//-----------------------------------------------------------------------
2319 /* Generate the code for a single instruction. */
2320 static void build_ins(BuildCtx *ctx, BCOp op, int defop)
2327 /* -- Comparison ops ---------------------------------------------------- */
2329 /* Remember: all ops branch for a true comparison, fall through otherwise. */
2331 case BC_ISLT: case BC_ISGE: case BC_ISLE: case BC_ISGT:
2332 | // RA = src1*8, RD = src2*8, JMP with RD = target
2333 | addu CARG2, BASE, RA
2334 | addu CARG3, BASE, RD
2335 | lw TMP0, HI(CARG2)
2336 | lw TMP1, HI(CARG3)
2339 | sltiu TMP0, TMP0, LJ_TISNUM
2340 | sltiu TMP1, TMP1, LJ_TISNUM
2341 | lhu TMP2, OFS_RD(PC)
2342 | and TMP0, TMP0, TMP1
2344 | beqz TMP0, ->vmeta_comp
2345 |. lui TMP1, (-(BCBIAS_J*4 >> 16) & 65535)
2347 | addu TMP2, TMP2, TMP1
2348 if (op == BC_ISLT || op == BC_ISGE) {
2353 if (op == BC_ISLT || op == BC_ISLE) {
2363 case BC_ISEQV: case BC_ISNEV:
2364 vk = op == BC_ISEQV;
2365 | // RA = src1*8, RD = src2*8, JMP with RD = target
2371 | lhu TMP2, -4+OFS_RD(PC)
2374 | lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535)
2375 | sltiu AT, TMP0, LJ_TISNUM
2376 | sltiu CARG1, TMP1, LJ_TISNUM
2380 |. addu TMP2, TMP2, TMP3
2390 |5: // Either or both types are not numbers.
2394 | li TMP3, LJ_TCDATA
2395 | beq TMP0, TMP3, ->vmeta_equal_cd
2397 |. sltiu AT, TMP0, LJ_TISPRI // Not a primitive?
2399 | beq TMP1, TMP3, ->vmeta_equal_cd
2401 |. xor TMP3, CARG2, CARG3 // Same tv?
2402 | xor TMP1, TMP1, TMP0 // Same type?
2403 | sltiu CARG1, TMP0, LJ_TISTABUD+1 // Table or userdata?
2404 | movz TMP3, r0, AT // Ignore tv if primitive.
2405 | movn CARG1, r0, TMP1 // Tab/ud and same type?
2406 | or AT, TMP1, TMP3 // Same type && (pri||same tv).
2407 | movz CARG1, r0, AT
2408 | beqz CARG1, <1 // Done if not tab/ud or not same type or same tv.
2410 |. movn TMP2, r0, AT
2412 |. movz TMP2, r0, AT
2414 | // Different tables or userdatas. Need to check __eq metamethod.
2415 | // Field metatable must be at same offset for GCtab and GCudata!
2416 | lw TAB:TMP1, TAB:CARG2->metatable
2417 | beqz TAB:TMP1, <1 // No metatable?
2419 | lbu TMP1, TAB:TMP1->nomm
2420 | andi TMP1, TMP1, 1<<MM_eq
2421 | bnez TMP1, <1 // Or 'no __eq' flag set?
2423 | b ->vmeta_equal // Handle __eq metamethod.
2424 |. li CARG4, 1-vk // ne = 0 or 1.
2427 case BC_ISEQS: case BC_ISNES:
2428 vk = op == BC_ISEQS;
2429 | // RA = src*8, RD = str_const*8 (~), JMP with RD = target
2434 | lw STR:TMP3, LO(RA)
2435 | subu RD, KBASE, RD
2436 | lhu TMP2, -4+OFS_RD(PC)
2439 | beq TMP0, AT, ->vmeta_equal_cd
2441 |. lw STR:TMP1, -4(RD) // KBASE-4-str_const*4
2442 | addiu TMP0, TMP0, -LJ_TSTR
2444 | xor TMP1, STR:TMP1, STR:TMP3
2445 | or TMP0, TMP0, TMP1
2446 | lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535)
2447 | addu TMP2, TMP2, TMP3
2449 | movn TMP2, r0, TMP0
2451 | movz TMP2, r0, TMP0
2457 case BC_ISEQN: case BC_ISNEN:
2458 vk = op == BC_ISEQN;
2459 | // RA = src*8, RD = num_const*8, JMP with RD = target
2464 | addu RD, KBASE, RD
2465 | lhu TMP2, -4+OFS_RD(PC)
2467 | lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535)
2468 | sltiu AT, TMP0, LJ_TISNUM
2475 |. addu TMP2, TMP2, TMP3
2490 | beq TMP0, AT, ->vmeta_equal_cd
2497 case BC_ISEQP: case BC_ISNEP:
2498 vk = op == BC_ISEQP;
2499 | // RA = src*8, RD = primitive_type*8 (~), JMP with RD = target
2503 | lhu TMP2, OFS_RD(PC)
2508 | beq TMP0, AT, ->vmeta_equal_cd
2510 |. xor TMP0, TMP0, TMP1
2512 | lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535)
2513 | addu TMP2, TMP2, TMP3
2515 | movn TMP2, r0, TMP0
2517 | movz TMP2, r0, TMP0
2523 /* -- Unary test and copy ops ------------------------------------------- */
2525 case BC_ISTC: case BC_ISFC: case BC_IST: case BC_ISF:
2526 | // RA = dst*8 or unused, RD = src*8, JMP with RD = target
2528 | lhu TMP2, OFS_RD(PC)
2531 if (op == BC_IST || op == BC_ISF) {
2532 | sltiu TMP0, TMP0, LJ_TISTRUECOND
2534 | lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535)
2535 | addu TMP2, TMP2, TMP3
2537 | movz TMP2, r0, TMP0
2539 | movn TMP2, r0, TMP0
2543 | sltiu TMP0, TMP0, LJ_TISTRUECOND
2545 if (op == BC_ISTC) {
2550 |. addu RA, BASE, RA
2552 | lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535)
2553 | addu TMP2, TMP2, TMP3
2561 /* -- Unary ops --------------------------------------------------------- */
2564 | // RA = dst*8, RD = src*8
2573 | // RA = dst*8, RD = src*8
2577 | li TMP1, LJ_TFALSE
2578 | sltiu TMP0, TMP0, LJ_TISTRUECOND
2579 | addiu TMP1, TMP0, LJ_TTRUE
2585 | // RA = dst*8, RD = src*8
2586 | addu CARG3, BASE, RD
2588 | lw TMP0, HI(CARG3)
2590 | sltiu AT, TMP0, LJ_TISNUM
2591 | beqz AT, ->vmeta_unm
2598 | // RA = dst*8, RD = src*8
2599 | addu CARG2, BASE, RD
2601 | lw TMP0, HI(CARG2)
2602 | lw CARG1, LO(CARG2)
2606 | lw CRET1, STR:CARG1->len
2614 | bne TMP0, AT, ->vmeta_len
2617 | lw TAB:TMP2, TAB:CARG1->metatable
2623 | load_got lj_tab_len
2624 | call_intern lj_tab_len // (GCtab *t)
2626 | // Returns uint32_t (but less than 2^31).
2631 | lbu TMP0, TAB:TMP2->nomm
2632 | andi TMP0, TMP0, 1<<MM_len
2633 | bnez TMP0, <3 // 'no __len' flag set: done.
2640 /* -- Binary ops -------------------------------------------------------- */
2642 |.macro ins_arithpre
2643 ||vk = ((int)op - BC_ADDVN) / (BC_ADDNV-BC_ADDVN);
2644 | decode_RB8a RB, INS
2646 | decode_RDtoRC8 RC, RD
2647 | // RA = dst*8, RB = src1*8, RC = src2*8 | num_const*8
2650 | addu CARG3, BASE, RB
2651 | addu CARG4, KBASE, RC
2652 | lw TMP1, HI(CARG3)
2653 | ldc1 f20, 0(CARG3)
2654 | ldc1 f22, 0(CARG4)
2655 | sltiu AT, TMP1, LJ_TISNUM
2658 | addu CARG4, BASE, RB
2659 | addu CARG3, KBASE, RC
2660 | lw TMP1, HI(CARG4)
2661 | ldc1 f22, 0(CARG4)
2662 | ldc1 f20, 0(CARG3)
2663 | sltiu AT, TMP1, LJ_TISNUM
2666 | addu CARG3, BASE, RB
2667 | addu CARG4, BASE, RC
2668 | lw TMP1, HI(CARG3)
2669 | lw TMP2, HI(CARG4)
2670 | ldc1 f20, 0(CARG3)
2671 | ldc1 f22, 0(CARG4)
2672 | sltiu AT, TMP1, LJ_TISNUM
2673 | sltiu TMP0, TMP2, LJ_TISNUM
2677 | beqz AT, ->vmeta_arith
2678 |. addu RA, BASE, RA
2681 |.macro fpmod, a, b, c
2683 | bal ->vm_floor // floor(b/c)
2684 |. div.d FARG1, b, c
2686 | sub.d a, b, a // b - floor(b/c)*c
2689 |.macro ins_arith, ins
2691 |.if "ins" == "fpmod_"
2692 | b ->BC_MODVN_Z // Avoid 3 copies. It's slow anyway.
2702 case BC_ADDVN: case BC_ADDNV: case BC_ADDVV:
2705 case BC_SUBVN: case BC_SUBNV: case BC_SUBVV:
2708 case BC_MULVN: case BC_MULNV: case BC_MULVV:
2711 case BC_DIVVN: case BC_DIVNV: case BC_DIVVV:
2717 case BC_MODNV: case BC_MODVV:
2721 | decode_RB8a RB, INS
2723 | decode_RDtoRC8 RC, RD
2724 | addu CARG3, BASE, RB
2725 | addu CARG4, BASE, RC
2726 | lw TMP1, HI(CARG3)
2727 | lw TMP2, HI(CARG4)
2728 | ldc1 FARG1, 0(CARG3)
2729 | ldc1 FARG2, 0(CARG4)
2730 | sltiu AT, TMP1, LJ_TISNUM
2731 | sltiu TMP0, TMP2, LJ_TISNUM
2734 | beqz AT, ->vmeta_arith
2735 |. addu RA, BASE, RA
2744 | // RA = dst*8, RB = src_start*8, RC = src_end*8
2745 | decode_RB8a RB, INS
2747 | decode_RDtoRC8 RC, RD
2748 | subu CARG3, RC, RB
2750 | addu CARG2, BASE, RC
2753 | load_got lj_meta_cat
2754 | srl CARG3, CARG3, 3
2756 | call_intern lj_meta_cat // (lua_State *L, TValue *top, int left)
2758 | // Returns NULL (finished) or TValue * (metamethod).
2759 | bnez CRET1, ->vmeta_binop
2761 | addu RB, BASE, MULTRES
2765 | sdc1 f0, 0(RA) // Copy result from RB to RA.
2769 /* -- Constant ops ------------------------------------------------------ */
2772 | // RA = dst*8, RD = str_const*8 (~)
2774 | subu TMP1, KBASE, TMP1
2776 | lw TMP0, -4(TMP1) // KBASE-4-str_const*4
2785 | // RA = dst*8, RD = cdata_const*8 (~)
2787 | subu TMP1, KBASE, TMP1
2789 | lw TMP0, -4(TMP1) // KBASE-4-cdata_const*4
2791 | li TMP2, LJ_TCDATA
2798 | // RA = dst*8, RD = int16_literal*8
2808 | // RA = dst*8, RD = num_const*8
2809 | addu RD, KBASE, RD
2817 | // RA = dst*8, RD = primitive_type*8 (~)
2826 | // RA = base*8, RD = end*8
2839 /* -- Upvalue and function ops ------------------------------------------ */
2842 | // RA = dst*8, RD = uvnum*8
2843 | lw LFUNC:RB, FRAME_FUNC(BASE)
2845 | addu RD, RD, LFUNC:RB
2846 | lw UPVAL:RB, LFUNC:RD->uvptr
2848 | lw TMP1, UPVAL:RB->v
2855 | // RA = uvnum*8, RD = src*8
2856 | lw LFUNC:RB, FRAME_FUNC(BASE)
2859 | addu RA, RA, LFUNC:RB
2861 | lw UPVAL:RB, LFUNC:RA->uvptr
2862 | lbu TMP3, UPVAL:RB->marked
2863 | lw CARG2, UPVAL:RB->v
2864 | andi TMP3, TMP3, LJ_GC_BLACK // isblack(uv)
2865 | lbu TMP0, UPVAL:RB->closed
2868 | li AT, LJ_GC_BLACK|1
2869 | or TMP3, TMP3, TMP0
2870 | beq TMP3, AT, >2 // Upvalue is closed and black?
2871 |. addiu TMP2, TMP2, -(LJ_TISNUM+1)
2875 |2: // Check if new value is collectable.
2876 | sltiu AT, TMP2, LJ_TISGCV - (LJ_TISNUM+1)
2877 | beqz AT, <1 // tvisgcv(v)
2879 | lbu TMP3, GCOBJ:TMP1->gch.marked
2880 | andi TMP3, TMP3, LJ_GC_WHITES // iswhite(v)
2882 |. load_got lj_gc_barrieruv
2883 | // Crossed a write barrier. Move the barrier forward.
2884 | call_intern lj_gc_barrieruv // (global_State *g, TValue *tv)
2885 |. addiu CARG1, DISPATCH, GG_DISP2G
2890 | // RA = uvnum*8, RD = str_const*8 (~)
2891 | lw LFUNC:RB, FRAME_FUNC(BASE)
2894 | addu RA, RA, LFUNC:RB
2895 | subu TMP1, KBASE, TMP1
2896 | lw UPVAL:RB, LFUNC:RA->uvptr
2897 | lw STR:TMP1, -4(TMP1) // KBASE-4-str_const*4
2898 | lbu TMP2, UPVAL:RB->marked
2899 | lw CARG2, UPVAL:RB->v
2900 | lbu TMP3, STR:TMP1->marked
2901 | andi AT, TMP2, LJ_GC_BLACK // isblack(uv)
2902 | lbu TMP2, UPVAL:RB->closed
2904 | sw STR:TMP1, LO(CARG2)
2906 |. sw TMP0, HI(CARG2)
2910 |2: // Check if string is white and ensure upvalue is closed.
2912 |. andi AT, TMP3, LJ_GC_WHITES // iswhite(str)
2914 |. load_got lj_gc_barrieruv
2915 | // Crossed a write barrier. Move the barrier forward.
2916 | call_intern lj_gc_barrieruv // (global_State *g, TValue *tv)
2917 |. addiu CARG1, DISPATCH, GG_DISP2G
2922 | // RA = uvnum*8, RD = num_const*8
2923 | lw LFUNC:RB, FRAME_FUNC(BASE)
2925 | addu RD, KBASE, RD
2926 | addu RA, RA, LFUNC:RB
2928 | lw UPVAL:RB, LFUNC:RA->uvptr
2930 | lw TMP1, UPVAL:RB->v
2935 | // RA = uvnum*8, RD = primitive_type*8 (~)
2936 | lw LFUNC:RB, FRAME_FUNC(BASE)
2939 | addu RA, RA, LFUNC:RB
2941 | lw UPVAL:RB, LFUNC:RA->uvptr
2943 | lw TMP1, UPVAL:RB->v
2949 | // RA = level*8, RD = target
2950 | lw TMP2, L->openupval
2951 | branch_RD // Do this first since RD is not saved.
2952 | load_got lj_func_closeuv
2956 | call_intern lj_func_closeuv // (lua_State *L, TValue *level)
2957 |. addu CARG2, BASE, RA
2964 | // RA = dst*8, RD = proto_const*8 (~) (holding function prototype)
2966 | load_got lj_func_newL_gc
2967 | subu TMP1, KBASE, TMP1
2968 | lw CARG3, FRAME_FUNC(BASE)
2969 | lw CARG2, -4(TMP1) // KBASE-4-tab_const*4
2972 | // (lua_State *L, GCproto *pt, GCfuncL *parent)
2973 | call_intern lj_func_newL_gc
2975 | // Returns GCfuncL *.
2981 | sw LFUNC:CRET1, LO(RA)
2985 /* -- Table ops --------------------------------------------------------- */
2989 | // RA = dst*8, RD = (hbits|asize)*8 | tab_const*8 (~)
2990 | lw TMP0, DISPATCH_GL(gc.total)(DISPATCH)
2991 | lw TMP1, DISPATCH_GL(gc.threshold)(DISPATCH)
2994 | sltu AT, TMP0, TMP1
2997 if (op == BC_TNEW) {
2998 | load_got lj_tab_new
3000 | andi CARG2, CARG2, 0x7ff
3002 | addiu AT, CARG2, -0x7ff
3004 | movz CARG2, TMP0, AT
3005 | // (lua_State *L, int32_t asize, uint32_t hbits)
3006 | call_intern lj_tab_new
3008 | // Returns Table *.
3010 | load_got lj_tab_dup
3012 | subu TMP1, KBASE, TMP1
3014 | call_intern lj_tab_dup // (lua_State *L, Table *kt)
3015 |. lw CARG2, -4(TMP1) // KBASE-4-str_const*4
3016 | // Returns Table *.
3022 | sw TAB:CRET1, LO(RA)
3026 | load_got lj_gc_step_fixtop
3028 | call_intern lj_gc_step_fixtop // (lua_State *L)
3035 | // RA = dst*8, RD = str_const*8 (~)
3037 | // RA = src*8, RD = str_const*8 (~)
3038 | lw LFUNC:TMP2, FRAME_FUNC(BASE)
3040 | subu TMP1, KBASE, TMP1
3041 | lw TAB:RB, LFUNC:TMP2->env
3042 | lw STR:RC, -4(TMP1) // KBASE-4-str_const*4
3043 if (op == BC_GGET) {
3048 |. addu RA, BASE, RA
3052 | // RA = dst*8, RB = table*8, RC = key*8
3053 | decode_RB8a RB, INS
3055 | decode_RDtoRC8 RC, RD
3056 | addu CARG2, BASE, RB
3057 | addu CARG3, BASE, RC
3058 | lw TMP1, HI(CARG2)
3059 | lw TMP2, HI(CARG3)
3060 | lw TAB:RB, LO(CARG2)
3063 | bne TMP1, AT, ->vmeta_tgetv
3064 |. addu RA, BASE, RA
3065 | sltiu AT, TMP2, LJ_TISNUM
3069 | // Convert number key to integer, check for integerness and range.
3071 | lw TMP0, TAB:RB->asize
3074 | lw TMP1, TAB:RB->array
3076 | sltu AT, TMP2, TMP0
3079 | beqz AT, ->vmeta_tgetv // Integer key and in array part?
3080 |. addu TMP2, TMP1, TMP2
3082 | beq TMP0, TISNIL, >2
3089 |2: // Check for __index if table value is nil.
3090 | lw TAB:TMP2, TAB:RB->metatable
3091 | beqz TAB:TMP2, <1 // No metatable: done.
3093 | lbu TMP0, TAB:TMP2->nomm
3094 | andi TMP0, TMP0, 1<<MM_index
3095 | bnez TMP0, <1 // 'no __index' flag set: done.
3101 | bne TMP2, AT, ->vmeta_tgetv
3102 |. lw STR:RC, LO(CARG3)
3103 | b ->BC_TGETS_Z // String key?
3107 | // RA = dst*8, RB = table*8, RC = str_const*4 (~)
3108 | decode_RB8a RB, INS
3110 | addu CARG2, BASE, RB
3111 | decode_RC4a RC, INS
3112 | lw TMP0, HI(CARG2)
3115 | lw TAB:RB, LO(CARG2)
3116 | subu CARG3, KBASE, RC
3117 | lw STR:RC, -4(CARG3) // KBASE-4-str_const*4
3118 | bne TMP0, AT, ->vmeta_tgets1
3119 |. addu RA, BASE, RA
3121 | // TAB:RB = GCtab *, STR:RC = GCstr *, RA = dst*8
3122 | lw TMP0, TAB:RB->hmask
3123 | lw TMP1, STR:RC->hash
3124 | lw NODE:TMP2, TAB:RB->node
3125 | and TMP1, TMP1, TMP0 // idx = str->hash & tab->hmask
3128 | subu TMP1, TMP0, TMP1
3129 | addu NODE:TMP2, NODE:TMP2, TMP1 // node = tab->node + (idx*32-idx*8)
3131 | lw CARG1, offsetof(Node, key)+HI(NODE:TMP2)
3132 | lw TMP0, offsetof(Node, key)+LO(NODE:TMP2)
3133 | lw NODE:TMP1, NODE:TMP2->next
3134 | lw CARG2, offsetof(Node, val)+HI(NODE:TMP2)
3135 | addiu CARG1, CARG1, -LJ_TSTR
3136 | xor TMP0, TMP0, STR:RC
3137 | or AT, CARG1, TMP0
3139 |. lw TAB:TMP3, TAB:RB->metatable
3140 | beq CARG2, TISNIL, >5 // Key found, but nil value?
3141 |. lw CARG1, offsetof(Node, val)+LO(NODE:TMP2)
3148 |4: // Follow hash chain.
3149 | bnez NODE:TMP1, <1
3150 |. move NODE:TMP2, NODE:TMP1
3151 | // End of hash chain: key not found, nil result.
3153 |5: // Check for __index if table value is nil.
3154 | beqz TAB:TMP3, <3 // No metatable: done.
3155 |. li CARG2, LJ_TNIL
3156 | lbu TMP0, TAB:TMP3->nomm
3157 | andi TMP0, TMP0, 1<<MM_index
3158 | bnez TMP0, <3 // 'no __index' flag set: done.
3164 | // RA = dst*8, RB = table*8, RC = index*8
3165 | decode_RB8a RB, INS
3167 | addu CARG2, BASE, RB
3168 | decode_RDtoRC8 RC, RD
3169 | lw CARG1, HI(CARG2)
3171 | lw TAB:RB, LO(CARG2)
3173 | bne CARG1, AT, ->vmeta_tgetb
3175 | lw TMP1, TAB:RB->asize
3176 | lw TMP2, TAB:RB->array
3177 | sltu AT, TMP0, TMP1
3178 | beqz AT, ->vmeta_tgetb
3179 |. addu RC, TMP2, RC
3181 | beq TMP1, TISNIL, >5
3188 |5: // Check for __index if table value is nil.
3189 | lw TAB:TMP2, TAB:RB->metatable
3190 | beqz TAB:TMP2, <1 // No metatable: done.
3192 | lbu TMP1, TAB:TMP2->nomm
3193 | andi TMP1, TMP1, 1<<MM_index
3194 | bnez TMP1, <1 // 'no __index' flag set: done.
3196 | b ->vmeta_tgetb // Caveat: preserve TMP0!
3201 | // RA = src*8, RB = table*8, RC = key*8
3202 | decode_RB8a RB, INS
3204 | decode_RDtoRC8 RC, RD
3205 | addu CARG2, BASE, RB
3206 | addu CARG3, BASE, RC
3207 | lw TMP1, HI(CARG2)
3208 | lw TMP2, HI(CARG3)
3209 | lw TAB:RB, LO(CARG2)
3212 | bne TMP1, AT, ->vmeta_tsetv
3213 |. addu RA, BASE, RA
3214 | sltiu AT, TMP2, LJ_TISNUM
3218 | // Convert number key to integer, check for integerness and range.
3220 | lw TMP0, TAB:RB->asize
3223 | lw TMP1, TAB:RB->array
3225 | sltu AT, TMP2, TMP0
3228 | beqz AT, ->vmeta_tsetv // Integer key and in array part?
3229 |. addu TMP1, TMP1, TMP2
3230 | lbu TMP3, TAB:RB->marked
3232 | beq TMP0, TISNIL, >3
3235 | andi AT, TMP3, LJ_GC_BLACK // isblack(table)
3241 |3: // Check for __newindex if previous value is nil.
3242 | lw TAB:TMP2, TAB:RB->metatable
3243 | beqz TAB:TMP2, <1 // No metatable: done.
3245 | lbu TMP2, TAB:TMP2->nomm
3246 | andi TMP2, TMP2, 1<<MM_newindex
3247 | bnez TMP2, <1 // 'no __newindex' flag set: done.
3253 | bne TMP2, AT, ->vmeta_tsetv
3254 |. lw STR:RC, LO(CARG3)
3255 | b ->BC_TSETS_Z // String key?
3258 |7: // Possible table write barrier for the value. Skip valiswhite check.
3259 | barrierback TAB:RB, TMP3, TMP0, <2
3262 | // RA = src*8, RB = table*8, RC = str_const*8 (~)
3263 | decode_RB8a RB, INS
3265 | addu CARG2, BASE, RB
3266 | decode_RC4a RC, INS
3267 | lw TMP0, HI(CARG2)
3270 | subu CARG3, KBASE, RC
3271 | lw TAB:RB, LO(CARG2)
3272 | lw STR:RC, -4(CARG3) // KBASE-4-str_const*4
3273 | bne TMP0, AT, ->vmeta_tsets1
3274 |. addu RA, BASE, RA
3276 | // TAB:RB = GCtab *, STR:RC = GCstr *, RA = BASE+src*8
3277 | lw TMP0, TAB:RB->hmask
3278 | lw TMP1, STR:RC->hash
3279 | lw NODE:TMP2, TAB:RB->node
3280 | sb r0, TAB:RB->nomm // Clear metamethod cache.
3281 | and TMP1, TMP1, TMP0 // idx = str->hash & tab->hmask
3284 | subu TMP1, TMP0, TMP1
3285 | addu NODE:TMP2, NODE:TMP2, TMP1 // node = tab->node + (idx*32-idx*8)
3288 | lw CARG1, offsetof(Node, key)+HI(NODE:TMP2)
3289 | lw TMP0, offsetof(Node, key)+LO(NODE:TMP2)
3291 | lw NODE:TMP1, NODE:TMP2->next
3293 |. lw CARG2, offsetof(Node, val)+HI(NODE:TMP2)
3294 | bne TMP0, STR:RC, >5
3295 |. lbu TMP3, TAB:RB->marked
3296 | beq CARG2, TISNIL, >4 // Key found, but nil value?
3297 |. lw TAB:TMP0, TAB:RB->metatable
3299 | andi AT, TMP3, LJ_GC_BLACK // isblack(table)
3301 |. sdc1 f20, NODE:TMP2->val
3305 |4: // Check for __newindex if previous value is nil.
3306 | beqz TAB:TMP0, <2 // No metatable: done.
3308 | lbu TMP0, TAB:TMP0->nomm
3309 | andi TMP0, TMP0, 1<<MM_newindex
3310 | bnez TMP0, <2 // 'no __newindex' flag set: done.
3315 |5: // Follow hash chain.
3316 | bnez NODE:TMP1, <1
3317 |. move NODE:TMP2, NODE:TMP1
3318 | // End of hash chain: key not found, add a new one
3320 | // But check for __newindex first.
3321 | lw TAB:TMP2, TAB:RB->metatable
3322 | beqz TAB:TMP2, >6 // No metatable: continue.
3323 |. addiu CARG3, DISPATCH, DISPATCH_GL(tmptv)
3324 | lbu TMP0, TAB:TMP2->nomm
3325 | andi TMP0, TMP0, 1<<MM_newindex
3326 | beqz TMP0, ->vmeta_tsets // 'no __newindex' flag NOT set: check.
3329 | load_got lj_tab_newkey
3330 | sw STR:RC, LO(CARG3)
3333 | move CARG2, TAB:RB
3335 | call_intern lj_tab_newkey // (lua_State *L, GCtab *t, TValue *k
3337 | // Returns TValue *.
3339 | b <3 // No 2nd write barrier needed.
3340 |. sdc1 f20, 0(CRET1)
3342 |7: // Possible table write barrier for the value. Skip valiswhite check.
3343 | barrierback TAB:RB, TMP3, TMP0, <3
3346 | // RA = src*8, RB = table*8, RC = index*8
3347 | decode_RB8a RB, INS
3349 | addu CARG2, BASE, RB
3350 | decode_RDtoRC8 RC, RD
3351 | lw CARG1, HI(CARG2)
3353 | lw TAB:RB, LO(CARG2)
3355 | bne CARG1, AT, ->vmeta_tsetb
3357 | lw TMP1, TAB:RB->asize
3358 | lw TMP2, TAB:RB->array
3359 | sltu AT, TMP0, TMP1
3360 | beqz AT, ->vmeta_tsetb
3361 |. addu RC, TMP2, RC
3363 | lbu TMP3, TAB:RB->marked
3364 | beq TMP1, TISNIL, >5
3367 | andi AT, TMP3, LJ_GC_BLACK // isblack(table)
3373 |5: // Check for __newindex if previous value is nil.
3374 | lw TAB:TMP2, TAB:RB->metatable
3375 | beqz TAB:TMP2, <1 // No metatable: done.
3377 | lbu TMP1, TAB:TMP2->nomm
3378 | andi TMP1, TMP1, 1<<MM_newindex
3379 | bnez TMP1, <1 // 'no __newindex' flag set: done.
3381 | b ->vmeta_tsetb // Caveat: preserve TMP0!
3384 |7: // Possible table write barrier for the value. Skip valiswhite check.
3385 | barrierback TAB:RB, TMP3, TMP0, <2
3389 | // RA = base*8 (table at base-1), RD = num_const*8 (start index)
3392 | addu TMP3, KBASE, RD
3393 | lw TAB:CARG2, -8+LO(RA) // Guaranteed to be a table.
3394 | addiu TMP0, MULTRES, -8
3395 | lw TMP3, LO(TMP3) // Integer constant is in lo-word.
3396 | beqz TMP0, >4 // Nothing to copy?
3397 |. srl CARG3, TMP0, 3
3398 | addu CARG3, CARG3, TMP3
3399 | lw TMP2, TAB:CARG2->asize
3401 | lbu TMP3, TAB:CARG2->marked
3402 | lw CARG1, TAB:CARG2->array
3403 | sltu AT, TMP2, CARG3
3405 |. addu TMP2, RA, TMP0
3406 | addu TMP1, TMP1, CARG1
3407 | andi TMP0, TMP3, LJ_GC_BLACK // isblack(table)
3408 |3: // Copy result slots to table.
3414 |. addiu TMP1, TMP1, 8
3420 |5: // Need to resize array part.
3421 | load_got lj_tab_reasize
3425 | call_intern lj_tab_reasize // (lua_State *L, GCtab *t, int nasize)
3427 | // Must not reallocate the stack.
3430 |. lw BASE, L->base // Reload BASE for lack of a saved register.
3432 |7: // Possible table write barrier for any value. Skip valiswhite check.
3433 | barrierback TAB:CARG2, TMP3, TMP0, <4
3436 /* -- Calls and vararg handling ----------------------------------------- */
3439 | // RA = base*8, (RB = (nresults+1)*8,) RC = extra_nargs*8
3440 | decode_RDtoRC8 NARGS8:RC, RD
3442 |. addu NARGS8:RC, NARGS8:RC, MULTRES
3445 | // RA = base*8, (RB = (nresults+1)*8,) RC = (nargs+1)*8
3446 | decode_RDtoRC8 NARGS8:RC, RD
3449 | addu BASE, BASE, RA
3452 | lw LFUNC:RB, LO(BASE)
3453 | addiu BASE, BASE, 8
3454 | bne TMP0, AT, ->vmeta_call
3455 |. addiu NARGS8:RC, NARGS8:RC, -8
3460 | // RA = base*8, (RB = 0,) RC = extra_nargs*8
3461 | addu NARGS8:RD, NARGS8:RD, MULTRES // BC_CALLT gets RC from RD.
3462 | // Fall through. Assumes BC_CALLT follows.
3465 | // RA = base*8, (RB = 0,) RC = (nargs+1)*8
3469 | lw LFUNC:RB, LO(RA)
3470 | move NARGS8:RC, RD
3471 | lw TMP1, FRAME_PC(BASE)
3473 | bne TMP0, AT, ->vmeta_callt
3474 |. addiu NARGS8:RC, NARGS8:RC, -8
3476 | andi TMP0, TMP1, FRAME_TYPE // Caveat: preserve TMP0 until the 'or'.
3477 | lbu TMP3, LFUNC:RB->ffid
3479 |. xori TMP2, TMP1, FRAME_VARG
3481 | sw LFUNC:RB, FRAME_FUNC(BASE) // Copy function down, but keep PC.
3482 | sltiu AT, TMP3, 2 // (> FF_C) Calling a fast function?
3484 | beqz NARGS8:RC, >3
3485 |. move TMP3, NARGS8:RC
3489 | addiu TMP3, TMP3, -8
3492 |. addiu TMP2, TMP2, 8
3500 |5: // Tailcall to a fast function with a Lua frame below.
3502 | decode_RA8a RA, INS
3504 | subu TMP1, BASE, RA
3505 | lw LFUNC:TMP1, -8+FRAME_FUNC(TMP1)
3506 | lw TMP1, LFUNC:TMP1->pc
3508 |. lw KBASE, PC2PROTO(k)(TMP1) // Need to prepare KBASE.
3510 |7: // Tailcall from a vararg function.
3511 | andi AT, TMP2, FRAME_TYPEP
3512 | bnez AT, <1 // Vararg frame below?
3513 |. subu TMP2, BASE, TMP2 // Relocate BASE down.
3515 | lw TMP1, FRAME_PC(TMP2)
3517 |. andi TMP0, TMP1, FRAME_TYPE
3521 | // RA = base*8, (RB = (nresults+1)*8, RC = (nargs+1)*8 ((2+1)*8))
3523 | addu BASE, BASE, RA
3525 | lw TMP1, -24+HI(BASE)
3526 | lw LFUNC:RB, -24+LO(BASE)
3528 | ldc1 f0, -16(BASE)
3529 | sw TMP1, HI(BASE) // Copy callable.
3530 | sw LFUNC:RB, LO(BASE)
3531 | sdc1 f2, 16(BASE) // Copy control var.
3532 | sdc1 f0, 8(BASE) // Copy state.
3533 | addiu BASE, BASE, 8
3534 | bne TMP1, AT, ->vmeta_call
3535 |. li NARGS8:RC, 16 // Iterators get 2 arguments.
3540 | // RA = base*8, (RB = (nresults+1)*8, RC = (nargs+1)*8 (2+1)*8)
3542 | // NYI: add hotloop, record BC_ITERN.
3545 | lw TAB:RB, -16+LO(RA)
3546 | lw RC, -8+LO(RA) // Get index from control var.
3547 | lw TMP0, TAB:RB->asize
3548 | lw TMP1, TAB:RB->array
3550 |1: // Traverse array part.
3552 | beqz AT, >5 // Index points after array part?
3554 | addu TMP3, TMP1, TMP3
3558 | lhu RD, -4+OFS_RD(PC)
3559 | beq TMP2, TISNIL, <1 // Skip holes in array part.
3562 | lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535)
3566 | sw RC, -8+LO(RA) // Update control var.
3572 |5: // Traverse hash part.
3573 | lw TMP1, TAB:RB->hmask
3575 | lw TMP2, TAB:RB->node
3577 | sltu AT, TMP1, RC // End of iteration? Branch to ITERL+1.
3581 | subu TMP3, TMP3, RB
3582 | addu NODE:TMP3, TMP3, TMP2
3583 | lw RB, HI(NODE:TMP3)
3584 | ldc1 f0, 0(NODE:TMP3)
3585 | lhu RD, -4+OFS_RD(PC)
3586 | beq RB, TISNIL, <6 // Skip holes in hash part.
3588 | ldc1 f2, NODE:TMP3->key
3589 | lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535)
3597 |. sw RC, -8+LO(RA) // Update control var.
3601 | // RA = base*8, RD = target (points to ITERN)
3603 | lw TMP0, -24+HI(RA)
3604 | lw CFUNC:TMP1, -24+LO(RA)
3605 | lw TMP2, -16+HI(RA)
3606 | lw TMP3, -8+HI(RA)
3609 |. addiu TMP2, TMP2, -LJ_TTAB
3610 | lbu TMP1, CFUNC:TMP1->ffid
3611 | addiu TMP3, TMP3, -LJ_TNIL
3613 | or TMP2, TMP2, TMP3
3614 | addiu TMP1, TMP1, -FF_next_N
3615 | addu TMP0, PC, TMP0
3616 | or TMP1, TMP1, TMP2
3618 |. lui TMP2, (-(BCBIAS_J*4 >> 16) & 65535)
3619 | addu PC, TMP0, TMP2
3621 | ori TMP1, TMP1, 0x7fff
3622 | sw r0, -8+LO(RA) // Initialize control var.
3623 | sw TMP1, -8+HI(RA)
3626 |5: // Despecialize bytecode if any of the checks fail.
3629 | sb TMP3, -4+OFS_OP(PC)
3630 | addu PC, TMP0, TMP2
3632 |. sb TMP1, OFS_OP(PC)
3636 | // RA = base*8, RB = (nresults+1)*8, RC = numparams*8
3637 | lw TMP0, FRAME_PC(BASE)
3638 | decode_RDtoRC8 RC, RD
3639 | decode_RB8a RB, INS
3643 | addiu RC, RC, FRAME_VARG
3645 | addiu TMP3, BASE, -8 // TMP3 = vtop
3646 | subu RC, RC, TMP0 // RC = vbase
3647 | // Note: RC may now be even _above_ BASE if nargs was < numparams.
3648 | beqz RB, >5 // Copy all varargs?
3649 |. subu TMP1, TMP3, RC
3650 | addiu TMP2, TMP2, -16
3651 |1: // Copy vararg slots to destination slots.
3656 | movz CARG1, TISNIL, AT
3665 |5: // Copy all varargs.
3666 | lw TMP0, L->maxstack
3667 | blez TMP1, <3 // No vararg slots?
3668 |. li MULTRES, 8 // MULTRES = (0+1)*8
3669 | addu TMP2, RA, TMP1
3670 | sltu AT, TMP0, TMP2
3672 |. addiu MULTRES, TMP1, 8
3678 | bnez AT, <6 // More vararg slots?
3683 |7: // Grow stack for varargs.
3684 | load_got lj_state_growstack
3688 | subu BASE, RC, BASE // Need delta, because BASE may change.
3690 | srl CARG2, TMP1, 3
3691 | call_intern lj_state_growstack // (lua_State *L, int n)
3698 |. addiu TMP3, BASE, -8
3701 /* -- Returns ----------------------------------------------------------- */
3704 | // RA = results*8, RD = extra_nresults*8
3705 | addu RD, RD, MULTRES // MULTRES >= 8, so RD >= 8.
3706 | // Fall through. Assumes BC_RET follows.
3710 | // RA = results*8, RD = (nresults+1)*8
3711 | lw PC, FRAME_PC(BASE)
3715 | andi TMP0, PC, FRAME_TYPE
3716 | bnez TMP0, ->BC_RETV_Z
3717 |. xori TMP1, PC, FRAME_VARG
3720 | // BASE = base, RA = resultptr, RD = (nresults+1)*8, PC = return
3722 | addiu TMP2, BASE, -8
3724 | decode_RA8a TMP0, INS
3725 | decode_RB8a RB, INS
3728 | addu TMP3, TMP2, RB
3730 |. subu BASE, TMP2, TMP0
3737 |. addiu TMP2, TMP2, 8
3739 | addiu TMP3, TMP3, -8
3741 | sltu AT, TMP2, TMP3
3743 |. lw LFUNC:TMP1, FRAME_FUNC(BASE)
3745 | lw TMP1, LFUNC:TMP1->pc
3746 | lw KBASE, PC2PROTO(k)(TMP1)
3749 |6: // Fill up results with nil.
3750 | sw TISNIL, HI(TMP2)
3752 |. addiu TMP2, TMP2, 8
3754 |->BC_RETV_Z: // Non-standard return case.
3755 | andi TMP2, TMP1, FRAME_TYPEP
3756 | bnez TMP2, ->vm_return
3758 | // Return from vararg function: relocate BASE down.
3759 | subu BASE, BASE, TMP1
3761 |. lw PC, FRAME_PC(BASE)
3764 case BC_RET0: case BC_RET1:
3765 | // RA = results*8, RD = (nresults+1)*8
3766 | lw PC, FRAME_PC(BASE)
3769 | andi TMP0, PC, FRAME_TYPE
3770 | bnez TMP0, ->BC_RETV_Z
3771 |. xori TMP1, PC, FRAME_VARG
3774 | addiu TMP2, BASE, -8
3775 if (op == BC_RET1) {
3778 | decode_RB8a RB, INS
3779 | decode_RA8a RA, INS
3782 if (op == BC_RET1) {
3785 | subu BASE, TMP2, RA
3789 |. lw LFUNC:TMP1, FRAME_FUNC(BASE)
3791 | lw TMP1, LFUNC:TMP1->pc
3792 | lw KBASE, PC2PROTO(k)(TMP1)
3795 |6: // Fill up results with nil.
3796 | addiu TMP2, TMP2, 8
3799 if (op == BC_RET1) {
3800 |. sw TISNIL, HI(TMP2)
3802 |. sw TISNIL, -8+HI(TMP2)
3806 /* -- Loops and branches ------------------------------------------------ */
3812 | // Fall through. Assumes BC_IFORL follows.
3822 | // RA = base*8, RD = target (after end of loop or start of loop)
3823 vk = (op == BC_IFORL || op == BC_JFORL);
3826 | ldc1 f0, FORL_IDX*8(RA)
3827 | ldc1 f4, FORL_STEP*8(RA)
3828 | ldc1 f2, FORL_STOP*8(RA)
3829 | lw TMP3, FORL_STEP*8+HI(RA)
3831 | sdc1 f0, FORL_IDX*8(RA)
3833 | lw TMP1, FORL_IDX*8+HI(RA)
3834 | lw TMP3, FORL_STEP*8+HI(RA)
3835 | lw TMP2, FORL_STOP*8+HI(RA)
3836 | sltiu TMP1, TMP1, LJ_TISNUM
3837 | sltiu TMP0, TMP3, LJ_TISNUM
3838 | sltiu TMP2, TMP2, LJ_TISNUM
3839 | and TMP1, TMP1, TMP0
3840 | and TMP1, TMP1, TMP2
3841 | ldc1 f0, FORL_IDX*8(RA)
3842 | beqz TMP1, ->vmeta_for
3843 |. ldc1 f2, FORL_STOP*8(RA)
3845 if (op != BC_JFORL) {
3847 | lui TMP0, (-(BCBIAS_J*4 >> 16) & 65535)
3851 | sdc1 f0, FORL_EXT*8(RA)
3852 if (op == BC_JFORI) {
3855 | addu TMP0, RD, TMP0
3856 | slt TMP3, TMP3, r0
3860 | lhu RD, -4+OFS_RD(PC)
3861 | movn TMP1, TMP2, TMP3
3862 | bnez TMP1, =>BC_JLOOP
3864 } else if (op == BC_JFORL) {
3867 | slt TMP3, TMP3, r0
3870 | movn TMP1, TMP2, TMP3
3871 | bnez TMP1, =>BC_JLOOP
3874 | addu TMP1, RD, TMP0
3875 | slt TMP3, TMP3, r0
3877 if (op == BC_FORI) {
3884 | movn TMP1, TMP2, TMP3
3894 | // Fall through. Assumes BC_IITERL follows.
3902 | // RA = base*8, RD = target
3905 | beq TMP1, TISNIL, >1 // Stop if iterator returned nil.
3907 if (op == BC_JITERL) {
3908 | sw TMP1, -8+HI(RA)
3910 |. sw TMP2, -8+LO(RA)
3912 | branch_RD // Otherwise save control var + branch.
3913 | sw TMP1, -8+HI(RA)
3914 | sw TMP2, -8+LO(RA)
3921 | // RA = base*8, RD = target (loop extent)
3922 | // Note: RA/RD is only used by trace recorder to determine scope/extent
3923 | // This opcode does NOT jump, it's only purpose is to detect a hot loop.
3927 | // Fall through. Assumes BC_ILOOP follows.
3931 | // RA = base*8, RD = target (loop extent)
3937 | // RA = base*8 (ignored), RD = traceno*8
3938 | lw TMP1, DISPATCH_J(trace)(DISPATCH)
3941 | addu TMP1, TMP1, RD
3942 | // Traces on MIPS don't store the trace number, so use 0.
3943 | sw AT, DISPATCH_GL(vmstate)(DISPATCH)
3944 | lw TRACE:TMP2, 0(TMP1)
3945 | sw BASE, DISPATCH_GL(jit_base)(DISPATCH)
3946 | sw L, DISPATCH_GL(jit_L)(DISPATCH)
3947 | lw TMP2, TRACE:TMP2->mcode
3949 |. addiu JGL, DISPATCH, GG_DISP2G+32768
3954 | // RA = base*8 (only used by trace recorder), RD = target
3959 /* -- Function headers -------------------------------------------------- */
3965 case BC_FUNCV: /* NYI: compiled vararg functions. */
3966 | // Fall through. Assumes BC_IFUNCF/BC_IFUNCV follow.
3974 | // BASE = new base, RA = BASE+framesize*8, RB = LFUNC, RC = nargs*8
3975 | lw TMP2, L->maxstack
3976 | lbu TMP1, -4+PC2PROTO(numparams)(PC)
3977 | lw KBASE, -4+PC2PROTO(k)(PC)
3979 | bnez AT, ->vm_growstack_l
3980 |. sll TMP1, TMP1, 3
3981 if (op != BC_JFUNCF) {
3985 | sltu AT, NARGS8:RC, TMP1 // Check for missing parameters.
3987 |. addu AT, BASE, NARGS8:RC
3988 if (op == BC_JFUNCF) {
3989 | decode_RD8a RD, INS
3996 |3: // Clear missing parameters.
3999 |. addiu NARGS8:RC, NARGS8:RC, 8
4006 | NYI // NYI: compiled vararg functions
4007 break; /* NYI: compiled vararg functions. */
4010 | // BASE = new base, RA = BASE+framesize*8, RB = LFUNC, RC = nargs*8
4011 | addu TMP1, BASE, RC
4012 | lw TMP2, L->maxstack
4014 | sw LFUNC:RB, LO(TMP1) // Store copy of LFUNC.
4015 | addiu TMP3, RC, 8+FRAME_VARG
4016 | sltu AT, TMP0, TMP2
4017 | lw KBASE, -4+PC2PROTO(k)(PC)
4018 | beqz AT, ->vm_growstack_l
4019 |. sw TMP3, HI(TMP1) // Store delta + FRAME_VARG.
4020 | lbu TMP2, -4+PC2PROTO(numparams)(PC)
4025 |. addiu BASE, TMP1, 8
4029 | sltu AT, RA, RC // Less args than parameters?
4031 | movz TMP0, TISNIL, AT // Clear missing parameters.
4032 | movn CARG1, TISNIL, AT // Clear old fixarg slot (help the GC).
4033 | sw TMP3, 8+LO(TMP1)
4034 | addiu TMP2, TMP2, -1
4035 | sw TMP0, 8+HI(TMP1)
4036 | addiu TMP1, TMP1, 8
4046 | // BASE = new base, RA = BASE+framesize*8, RB = CFUNC, RC = nargs*8
4047 if (op == BC_FUNCC) {
4048 | lw CFUNCADDR, CFUNC:RB->f
4050 | lw CFUNCADDR, DISPATCH_GL(wrapf)(DISPATCH)
4052 | addu TMP1, RA, NARGS8:RC
4053 | lw TMP2, L->maxstack
4054 | addu RC, BASE, NARGS8:RC
4056 | sltu AT, TMP2, TMP1
4059 if (op == BC_FUNCCW) {
4060 | lw CARG2, CFUNC:RB->f
4062 | bnez AT, ->vm_growstack_c // Need to grow stack.
4064 | jalr CFUNCADDR // (lua_State *L [, lua_CFunction f])
4066 | // Returns nresults.
4071 | lw PC, FRAME_PC(BASE) // Fetch PC of caller.
4072 | subu RA, TMP1, RD // RA = L->top - nresults*8
4077 /* ---------------------------------------------------------------------- */
4080 fprintf(stderr, "Error: undefined opcode BC_%s\n", bc_names[op]);
4086 static int build_backend(BuildCtx *ctx)
4090 dasm_growpc(Dst, BC__MAX);
4092 build_subroutines(ctx);
4095 for (op = 0; op < BC__MAX; op++)
4096 build_ins(ctx, (BCOp)op, op);
4101 /* Emit pseudo frame-info for all assembler functions. */
4102 static void emit_asm_debug(BuildCtx *ctx)
4104 int fcofs = (int)((uint8_t *)ctx->glob[GLOB_vm_ffi_call] - ctx->code);
4106 switch (ctx->mode) {
4108 fprintf(ctx->fp, "\t.section .debug_frame,\"\",@progbits\n");
4111 "\t.4byte .LECIE0-.LSCIE0\n"
4113 "\t.4byte 0xffffffff\n"
4119 "\t.byte 0xc\n\t.uleb128 29\n\t.uleb128 0\n"
4124 "\t.4byte .LEFDE0-.LASFDE0\n"
4126 "\t.4byte .Lframe0\n"
4127 "\t.4byte .Lbegin\n"
4129 "\t.byte 0xe\n\t.uleb128 %d\n"
4130 "\t.byte 0x9f\n\t.sleb128 1\n"
4131 "\t.byte 0x9e\n\t.sleb128 2\n",
4132 fcofs, CFRAME_SIZE);
4133 for (i = 23; i >= 16; i--)
4134 fprintf(ctx->fp, "\t.byte %d\n\t.uleb128 %d\n", 0x80+i, 26-i);
4135 for (i = 30; i >= 20; i -= 2)
4136 fprintf(ctx->fp, "\t.byte %d\n\t.uleb128 %d\n", 0x80+32+i, 42-i);
4143 "\t.4byte .LEFDE1-.LASFDE1\n"
4145 "\t.4byte .Lframe0\n"
4146 "\t.4byte lj_vm_ffi_call\n"
4148 "\t.byte 0x9f\n\t.uleb128 1\n"
4149 "\t.byte 0x90\n\t.uleb128 2\n"
4150 "\t.byte 0xd\n\t.uleb128 0x10\n"
4152 ".LEFDE1:\n\n", (int)ctx->codesz - fcofs);
4154 fprintf(ctx->fp, "\t.section .eh_frame,\"aw\",@progbits\n");
4156 "\t.globl lj_err_unwind_dwarf\n"
4158 "\t.4byte .LECIE1-.LSCIE1\n"
4162 "\t.string \"zPR\"\n"
4166 "\t.uleb128 6\n" /* augmentation length */
4168 "\t.4byte lj_err_unwind_dwarf\n"
4170 "\t.byte 0xc\n\t.uleb128 29\n\t.uleb128 0\n"
4175 "\t.4byte .LEFDE2-.LASFDE2\n"
4177 "\t.4byte .LASFDE2-.Lframe1\n"
4178 "\t.4byte .Lbegin\n"
4180 "\t.uleb128 0\n" /* augmentation length */
4181 "\t.byte 0xe\n\t.uleb128 %d\n"
4182 "\t.byte 0x9f\n\t.sleb128 1\n"
4183 "\t.byte 0x9e\n\t.sleb128 2\n",
4184 fcofs, CFRAME_SIZE);
4185 for (i = 23; i >= 16; i--)
4186 fprintf(ctx->fp, "\t.byte %d\n\t.uleb128 %d\n", 0x80+i, 26-i);
4187 for (i = 30; i >= 20; i -= 2)
4188 fprintf(ctx->fp, "\t.byte %d\n\t.uleb128 %d\n", 0x80+32+i, 42-i);
4195 "\t.4byte .LECIE2-.LSCIE2\n"
4199 "\t.string \"zR\"\n"
4203 "\t.uleb128 1\n" /* augmentation length */
4205 "\t.byte 0xc\n\t.uleb128 29\n\t.uleb128 0\n"
4210 "\t.4byte .LEFDE3-.LASFDE3\n"
4212 "\t.4byte .LASFDE3-.Lframe2\n"
4213 "\t.4byte lj_vm_ffi_call\n"
4215 "\t.uleb128 0\n" /* augmentation length */
4216 "\t.byte 0x9f\n\t.uleb128 1\n"
4217 "\t.byte 0x90\n\t.uleb128 2\n"
4218 "\t.byte 0xd\n\t.uleb128 0x10\n"
4220 ".LEFDE3:\n\n", (int)ctx->codesz - fcofs);