1 |// Low-level VM code for PowerPC 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: r1 = sp, r2 and r13 = reserved (TOC, TLS or SDATA)
21 |// The following must be C callee-save (but BASE is often refetched).
22 |.define BASE, r14 // Base of current Lua stack frame.
23 |.define KBASE, r15 // Constants of current Lua function.
24 |.define PC, r16 // Next PC.
25 |.define DISPATCH, r17 // Opcode dispatch table.
26 |.define LREG, r18 // Register holding lua_State (also in SAVE_L).
27 |.define MULTRES, r19 // Size of multi-result: (nresults+1)*8.
28 |.define JGL, r31 // On-trace: global_State + 32768.
30 |// Constants for type-comparisons, stores and conversions. C callee-save.
34 |.define TOBIT, f30 // 2^52 + 2^51.
35 |.define TONUM, f31 // 2^52 + 2^51 + 2^31.
37 |// The following temporaries are not saved across C calls, except for RA.
38 |.define RA, r20 // Callee-save.
42 |.define INS, r7 // Overlaps CARG5.
47 |.define TMP3, r6 // Overlaps CARG4.
49 |// Saved temporaries.
52 |// Calling conventions.
56 |.define CARG4, r6 // Overlaps TMP3.
57 |.define CARG5, r7 // Overlaps INS.
65 |// Stack layout while in interpreter. Must match with lj_frame.h.
66 |.define SAVE_LR, 276(sp)
67 |.define CFRAME_SPACE, 272 // Delta for sp.
68 |// Back chain for sp: 272(sp) <-- sp entering interpreter
69 |.define SAVE_FPR_, 128 // .. 128+18*8: 64 bit FPR saves.
70 |.define SAVE_GPR_, 56 // .. 56+18*4: 32 bit GPR saves.
71 |.define SAVE_CR, 52(sp) // 32 bit CR save.
72 |.define SAVE_ERRF, 48(sp) // 32 bit C frame info.
73 |.define SAVE_NRES, 44(sp)
74 |.define SAVE_CFRAME, 40(sp)
75 |.define SAVE_L, 36(sp)
76 |.define SAVE_PC, 32(sp)
77 |.define SAVE_MULTRES, 28(sp)
78 |.define UNUSED1, 24(sp)
79 |.define TMPD_LO, 20(sp)
80 |.define TMPD_HI, 16(sp)
81 |.define TONUM_LO, 12(sp)
82 |.define TONUM_HI, 8(sp)
83 |// Next frame lr: 4(sp)
84 |// Back chain for sp: 0(sp) <-- sp while in interpreter
86 |.define TMPD_BLO, 23(sp)
87 |.define TMPD, TMPD_HI
88 |.define TONUM_D, TONUM_HI
91 | stw r..reg, SAVE_GPR_+(reg-14)*4(sp)
92 | stfd f..reg, SAVE_FPR_+(reg-14)*8(sp)
95 | lwz r..reg, SAVE_GPR_+(reg-14)*4(sp)
96 | lfd f..reg, SAVE_FPR_+(reg-14)*8(sp)
100 | stwu sp, -CFRAME_SPACE(sp)
101 | save_ 14; save_ 15; save_ 16
103 | save_ 17; save_ 18; save_ 19; save_ 20; save_ 21; save_ 22
105 | save_ 23; save_ 24; save_ 25
107 | save_ 26; save_ 27; save_ 28; save_ 29; save_ 30; save_ 31
112 | lwz r0, SAVE_LR; lwz r12, SAVE_CR
113 | rest_ 14; rest_ 15; rest_ 16; rest_ 17; rest_ 18; rest_ 19
114 | mtlr r0; mtcrf 0x38, r12
115 | rest_ 20; rest_ 21; rest_ 22; rest_ 23; rest_ 24; rest_ 25
116 | rest_ 26; rest_ 27; rest_ 28; rest_ 29; rest_ 30; rest_ 31
117 | addi sp, sp, CFRAME_SPACE
120 |// Type definitions. Some of these are only used for documentation.
121 |.type L, lua_State, LREG
122 |.type GL, global_State
123 |.type TVALUE, TValue
127 |.type LFUNC, GCfuncL
128 |.type CFUNC, GCfuncC
129 |.type PROTO, GCproto
130 |.type UPVAL, GCupval
133 |.type TRACE, GCtrace
135 |//-----------------------------------------------------------------------
137 |// These basic macros should really be part of DynASM.
138 |.macro srwi, rx, ry, n; rlwinm rx, ry, 32-n, n, 31; .endmacro
139 |.macro slwi, rx, ry, n; rlwinm rx, ry, n, 0, 31-n; .endmacro
140 |.macro rotlwi, rx, ry, n; rlwinm rx, ry, n, 0, 31; .endmacro
141 |.macro rotlw, rx, ry, rn; rlwnm rx, ry, rn, 0, 31; .endmacro
142 |.macro subi, rx, ry, i; addi rx, ry, -i; .endmacro
144 |// Trap for not-yet-implemented parts.
145 |.macro NYI; tw 4, sp, sp; .endmacro
147 |// int/FP conversions.
148 |.macro tonum_i, freg, reg
149 | xoris reg, reg, 0x8000
152 | fsub freg, freg, TONUM
155 |.macro tonum_u, freg, reg
158 | fsub freg, freg, TOBIT
161 |.macro toint, reg, freg, tmpfreg
162 | fctiwz tmpfreg, freg
167 |.macro toint, reg, freg
168 | toint reg, freg, freg
171 |//-----------------------------------------------------------------------
173 |// Access to frame relative to BASE.
174 |.define FRAME_PC, -8
175 |.define FRAME_FUNC, -4
177 |// Instruction decode.
178 |.macro decode_OP4, dst, ins; rlwinm dst, ins, 2, 22, 29; .endmacro
179 |.macro decode_RA8, dst, ins; rlwinm dst, ins, 27, 21, 28; .endmacro
180 |.macro decode_RB8, dst, ins; rlwinm dst, ins, 11, 21, 28; .endmacro
181 |.macro decode_RC8, dst, ins; rlwinm dst, ins, 19, 21, 28; .endmacro
182 |.macro decode_RD8, dst, ins; rlwinm dst, ins, 19, 13, 28; .endmacro
184 |.macro decode_OP1, dst, ins; rlwinm dst, ins, 0, 24, 31; .endmacro
185 |.macro decode_RD4, dst, ins; rlwinm dst, ins, 18, 14, 29; .endmacro
187 |// Instruction fetch.
192 |// Instruction decode+dispatch. Note: optimized for e300!
194 | decode_OP4 TMP1, INS
195 | lwzx TMP0, DISPATCH, TMP1
208 |// Instruction footer.
210 | // Replicated dispatch. Less unpredictable branches, but higher I-Cache use.
211 | .define ins_next, ins_NEXT
212 | .define ins_next_, ins_NEXT
213 | .define ins_next1, ins_NEXT1
214 | .define ins_next2, ins_NEXT2
216 | // Common dispatch. Lower I-Cache use, only one (very) unpredictable branch.
217 | // Affects only certain kinds of benchmarks (and only with -j off).
232 |// Call decode and dispatch.
234 | // BASE = new base, RB = LFUNC/CFUNC, RC = nargs*8, FRAME_PC(BASE) = PC
235 | lwz PC, LFUNC:RB->pc
238 | decode_OP4 TMP1, INS
240 | lwzx TMP0, DISPATCH, TMP1
247 | // BASE = new base, RB = LFUNC/CFUNC, RC = nargs*8, PC = caller PC
248 | stw PC, FRAME_PC(BASE)
252 |//-----------------------------------------------------------------------
254 |// Macros to test operand types.
255 |.macro checknum, reg; cmplw reg, TISNUM; .endmacro
256 |.macro checknum, cr, reg; cmplw cr, reg, TISNUM; .endmacro
257 |.macro checkstr, reg; cmpwi reg, LJ_TSTR; .endmacro
258 |.macro checktab, reg; cmpwi reg, LJ_TTAB; .endmacro
259 |.macro checkfunc, reg; cmpwi reg, LJ_TFUNC; .endmacro
260 |.macro checknil, reg; cmpwi reg, LJ_TNIL; .endmacro
264 | addis PC, PC, -(BCBIAS_J*4 >> 16)
268 |// Assumes DISPATCH is relative to GL.
269 #define DISPATCH_GL(field) (GG_DISP2G + (int)offsetof(global_State, field))
270 #define DISPATCH_J(field) (GG_DISP2J + (int)offsetof(jit_State, field))
272 #define PC2PROTO(field) ((int)offsetof(GCproto, field)-(int)sizeof(GCproto))
274 |.macro hotcheck, delta, target
275 | rlwinm TMP1, PC, 31, 25, 30
276 | addi TMP1, TMP1, GG_DISP2HOT
277 | lhzx TMP2, DISPATCH, TMP1
278 | addic. TMP2, TMP2, -delta
279 | sthx TMP2, DISPATCH, TMP1
284 | hotcheck HOTCOUNT_LOOP, ->vm_hotloop
288 | hotcheck HOTCOUNT_CALL, ->vm_hotcall
291 |// Set current VM state. Uses TMP0.
292 |.macro li_vmstate, st; li TMP0, ~LJ_VMST_..st; .endmacro
293 |.macro st_vmstate; stw TMP0, DISPATCH_GL(vmstate)(DISPATCH); .endmacro
295 |// Move table write barrier back. Overwrites mark and tmp.
296 |.macro barrierback, tab, mark, tmp
297 | lwz tmp, DISPATCH_GL(gc.grayagain)(DISPATCH)
298 | // Assumes LJ_GC_BLACK is 0x04.
299 | rlwinm mark, mark, 0, 30, 28 // black2gray(tab)
300 | stw tab, DISPATCH_GL(gc.grayagain)(DISPATCH)
301 | stb mark, tab->marked
302 | stw tmp, tab->gclist
305 |//-----------------------------------------------------------------------
307 /* Generate subroutines used by opcodes and other parts of the VM. */
308 /* The .code_sub section should be last to help static branch prediction. */
309 static void build_subroutines(BuildCtx *ctx)
313 |//-----------------------------------------------------------------------
314 |//-- Return handling ----------------------------------------------------
315 |//-----------------------------------------------------------------------
318 | // See vm_return. Also: TMP2 = previous base.
319 | andi. TMP0, PC, FRAME_P
321 | beq ->cont_dispatch
323 | // Return from pcall or xpcall fast func.
324 | lwz PC, FRAME_PC(TMP2) // Fetch PC of previous frame.
325 | mr BASE, TMP2 // Restore caller base.
326 | // Prepending may overwrite the pcall frame, so do it at the end.
327 | stwu TMP1, FRAME_PC(RA) // Prepend true to results.
330 | andi. TMP0, PC, FRAME_TYPE
331 | addi RD, RD, 8 // RD = (nresults+1)*8.
333 | beq ->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
338 | cmpwi TMP0, FRAME_C
339 | rlwinm TMP2, PC, 0, 0, 28
341 | sub TMP2, BASE, TMP2 // TMP2 = previous base.
344 | addic. TMP1, RD, -8
346 | lwz TMP2, SAVE_NRES
352 | addic. TMP1, TMP1, -8
360 | cmpw TMP2, RD // More/less results wanted?
363 | stw BASE, L->top // Store new top.
366 | lwz TMP0, SAVE_CFRAME // Restore previous C frame.
367 | li CRET1, 0 // Ok return status for vm_pcall.
368 | stw TMP0, L->cframe
375 | ble >7 // Less results wanted?
376 | // More results wanted. Check stack size and fill up results with nil.
377 | lwz TMP1, L->maxstack
380 | stw TISNIL, 0(BASE)
385 |7: // Less results wanted.
386 | subfic TMP3, TMP2, 0 // LUA_MULTRET+1 case?
388 | subfe TMP1, TMP1, TMP1 // TMP1 = TMP2 == 0 ? 0 : -1
389 | and TMP0, TMP0, TMP1
390 | sub BASE, BASE, TMP0 // Either keep top or shrink it.
393 |8: // Corner case: need to grow stack for filling up results.
394 | // This can happen if:
395 | // - A C function grows the stack (a lot).
396 | // - The GC shrinks the stack in between.
397 | // - A return back from a lua_call() with (high) nresults adjustment.
398 | stw BASE, L->top // Save current top held in BASE (yes).
402 | bl extern lj_state_growstack // (lua_State *L, int n)
403 | lwz TMP2, SAVE_NRES
406 | lwz BASE, L->top // Need the (realloced) L->top in BASE.
409 |->vm_unwind_c: // Unwind C stack, return from vm_pcall.
410 | // (void *cframe, int errcode)
413 |->vm_unwind_c_eh: // Landing pad for external unwinder.
415 | li TMP0, ~LJ_VMST_C
416 | lwz GL:TMP1, L->glref
417 | stw TMP0, GL:TMP1->vmstate
420 |->vm_unwind_ff: // Unwind C stack, return from ff pcall.
422 | rlwinm sp, CARG1, 0, 0, 29
423 |->vm_unwind_ff_eh: // Landing pad for external unwinder.
425 | li TISNUM, LJ_TISNUM // Setup type comparison constants.
427 | lus TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float).
428 | lwz DISPATCH, L->glref // Setup pointer to dispatch table.
432 | ori TMP3, TMP3, 0x0004 // TONUM = 2^52 + 2^51 + 2^31 (float).
436 | lwz PC, FRAME_PC(BASE) // Fetch PC of previous frame.
437 | la RA, -8(BASE) // Results start at BASE-8.
439 | addi DISPATCH, DISPATCH, GG_G2DISP
440 | stw TMP1, 0(RA) // Prepend false to error message.
441 | li RD, 16 // 2 results: false + error message.
446 |//-----------------------------------------------------------------------
447 |//-- Grow stack for calls -----------------------------------------------
448 |//-----------------------------------------------------------------------
450 |->vm_growstack_c: // Grow stack for C function.
451 | li CARG2, LUA_MINSTACK
454 |->vm_growstack_l: // Grow stack for Lua function.
455 | // BASE = new base, RA = BASE+framesize*8, RC = nargs*8, PC = first PC
459 | addi PC, PC, 4 // Must point after first instruction.
463 | // L->base = new base, L->top = top
466 | bl extern lj_state_growstack // (lua_State *L, int n)
469 | lwz LFUNC:RB, FRAME_FUNC(BASE)
471 | // BASE = new base, RB = LFUNC/CFUNC, RC = nargs*8, FRAME_PC(BASE) = PC
472 | ins_callt // Just retry the call.
474 |//-----------------------------------------------------------------------
475 |//-- Entry points into the assembler VM ---------------------------------
476 |//-----------------------------------------------------------------------
478 |->vm_resume: // Setup C frame and resume thread.
479 | // (lua_State *L, TValue *base, int nres1 = 0, ptrdiff_t ef = 0)
482 | lwz DISPATCH, L->glref // Setup pointer to dispatch table.
484 | lbz TMP1, L->status
487 | addi TMP0, sp, CFRAME_RESUME
488 | addi DISPATCH, DISPATCH, GG_G2DISP
489 | stw CARG3, SAVE_NRES
491 | stw CARG3, SAVE_ERRF
492 | stw TMP0, L->cframe
493 | stw CARG3, SAVE_CFRAME
494 | stw CARG1, SAVE_PC // Any value outside of bytecode is ok.
497 | // Resume after yield (like a return).
500 | li TISNUM, LJ_TISNUM // Setup type comparison constants.
502 | lwz PC, FRAME_PC(BASE)
503 | lus TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float).
504 | stb CARG3, L->status
506 | ori TMP3, TMP3, 0x0004 // TONUM = 2^52 + 2^51 + 2^31 (float).
510 | lus TMP0, 0x4338 // Hiword of 2^52 + 2^51 (double)
516 | andi. TMP0, PC, FRAME_TYPE
523 |->vm_pcall: // Setup protected C frame and enter VM.
524 | // (lua_State *L, TValue *base, int nres1, ptrdiff_t ef)
527 | stw CARG4, SAVE_ERRF
530 |->vm_call: // Setup C frame and enter VM.
531 | // (lua_State *L, TValue *base, int nres1)
535 |1: // Entry point for vm_pcall above (PC = ftype).
536 | lwz TMP1, L:CARG1->cframe
537 | stw CARG3, SAVE_NRES
541 | stw sp, L->cframe // Add our C frame to cframe chain.
542 | lwz DISPATCH, L->glref // Setup pointer to dispatch table.
543 | stw CARG1, SAVE_PC // Any value outside of bytecode is ok.
544 | stw TMP1, SAVE_CFRAME
545 | addi DISPATCH, DISPATCH, GG_G2DISP
547 |3: // Entry point for vm_cpcall/vm_resume (BASE = base, PC = ftype).
548 | lwz TMP2, L->base // TMP2 = old base (used in vmeta_call).
549 | li TISNUM, LJ_TISNUM // Setup type comparison constants.
551 | lus TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float).
555 | ori TMP3, TMP3, 0x0004 // TONUM = 2^52 + 2^51 + 2^31 (float).
557 | sub PC, PC, TMP2 // PC = frame delta + frame type
559 | lus TMP0, 0x4338 // Hiword of 2^52 + 2^51 (double)
560 | sub NARGS8:RC, TMP1, BASE
568 | // TMP2 = old base, BASE = new base, RC = nargs*8, PC = caller PC
569 | lwz TMP0, FRAME_PC(BASE)
570 | lwz LFUNC:RB, FRAME_FUNC(BASE)
571 | checkfunc TMP0; bne ->vmeta_call
573 |->vm_call_dispatch_f:
575 | // BASE = new base, RB = func, RC = nargs*8, PC = caller PC
577 |->vm_cpcall: // Setup protected C frame, call C.
578 | // (lua_State *L, lua_CFunction func, void *ud, lua_CPFunction cp)
581 | lwz TMP0, L:CARG1->stack
584 | stw CARG1, SAVE_PC // Any value outside of bytecode is ok.
585 | sub TMP0, TMP0, TMP1 // Compute -savestack(L, L->top).
586 | lwz TMP1, L->cframe
587 | stw sp, L->cframe // Add our C frame to cframe chain.
589 | stw TMP0, SAVE_NRES // Neg. delta means cframe w/o frame.
590 | stw TMP2, SAVE_ERRF // No error function.
591 | stw TMP1, SAVE_CFRAME
593 | bctrl // (lua_State *L, lua_CFunction func, void *ud)
595 | lwz DISPATCH, L->glref // Setup pointer to dispatch table.
597 | addi DISPATCH, DISPATCH, GG_G2DISP
598 | bne <3 // Else continue with the call.
599 | b ->vm_leave_cp // No base? Just remove C frame.
601 |//-----------------------------------------------------------------------
602 |//-- Metamethod handling ------------------------------------------------
603 |//-----------------------------------------------------------------------
605 |// The lj_meta_* functions (except for lj_meta_cat) don't reallocate the
606 |// stack, so BASE doesn't need to be reloaded across these calls.
608 |//-- Continuation dispatch ----------------------------------------------
611 | // BASE = meta base, RA = resultptr, RD = (nresults+1)*8
612 | lwz TMP0, -12(BASE) // Continuation.
614 | mr BASE, TMP2 // Restore caller BASE.
615 | lwz LFUNC:TMP1, FRAME_FUNC(TMP2)
619 | lwz PC, -16(RB) // Restore PC from [cont|PC].
621 | lwz TMP1, LFUNC:TMP1->pc
622 | stwx TISNIL, RA, TMP2 // Ensure one valid arg.
626 | lwz KBASE, PC2PROTO(k)(TMP1)
627 | // BASE = base, RA = resultptr, RB = meta base
629 | bctr // Jump to continuation.
633 | beq ->cont_ffi_callback // cont = 1: return from FFI callback.
634 | // cont = 0: tailcall from C function.
640 |->cont_cat: // RA = resultptr, RB = meta base
643 | decode_RB8 SAVE0, INS
645 | add TMP1, BASE, SAVE0
648 | sub CARG3, CARG2, TMP1
655 |//-- Table indexing metamethods -----------------------------------------
658 | la CARG3, DISPATCH_GL(tmptv)(DISPATCH)
661 | stw STR:RC, 4(CARG3)
662 | add CARG2, BASE, RB
667 | la CARG2, DISPATCH_GL(tmptv)(DISPATCH)
669 | stw TAB:RB, 4(CARG2)
670 | la CARG3, DISPATCH_GL(tmptv2)(DISPATCH)
673 | stw STR:RC, 4(CARG3)
677 |->vmeta_tgetb: // TMP0 = index
682 | la CARG3, DISPATCH_GL(tmptv)(DISPATCH)
683 | add CARG2, BASE, RB
685 | stw TISNUM, 0(CARG3)
695 | add CARG2, BASE, RB
696 | add CARG3, BASE, RC
701 | bl extern lj_meta_tget // (lua_State *L, TValue *o, TValue *k)
702 | // Returns TValue * (finished) or NULL (metamethod).
710 |3: // Call __index metamethod.
711 | // BASE = base, L->top = new base, stack = cont/func/t/k
712 | subfic TMP1, BASE, FRAME_CONT
714 | stw PC, -16(BASE) // [cont|PC]
716 | lwz LFUNC:RB, FRAME_FUNC(BASE) // Guaranteed to be a function here.
717 | li NARGS8:RC, 16 // 2 args for func(t, k).
718 | b ->vm_call_dispatch_f
720 |//-----------------------------------------------------------------------
723 | la CARG3, DISPATCH_GL(tmptv)(DISPATCH)
726 | stw STR:RC, 4(CARG3)
727 | add CARG2, BASE, RB
732 | la CARG2, DISPATCH_GL(tmptv)(DISPATCH)
734 | stw TAB:RB, 4(CARG2)
735 | la CARG3, DISPATCH_GL(tmptv2)(DISPATCH)
738 | stw STR:RC, 4(CARG3)
742 |->vmeta_tsetb: // TMP0 = index
747 | la CARG3, DISPATCH_GL(tmptv)(DISPATCH)
748 | add CARG2, BASE, RB
750 | stw TISNUM, 0(CARG3)
760 | add CARG2, BASE, RB
761 | add CARG3, BASE, RC
766 | bl extern lj_meta_tset // (lua_State *L, TValue *o, TValue *k)
767 | // Returns TValue * (finished) or NULL (metamethod).
771 | // NOBARRIER: lj_meta_tset ensures the table is not black.
776 |3: // Call __newindex metamethod.
777 | // BASE = base, L->top = new base, stack = cont/func/t/k/(v)
778 | subfic TMP1, BASE, FRAME_CONT
780 | stw PC, -16(BASE) // [cont|PC]
782 | lwz LFUNC:RB, FRAME_FUNC(BASE) // Guaranteed to be a function here.
783 | li NARGS8:RC, 24 // 3 args for func(t, k, v)
784 | stfd f0, 16(BASE) // Copy value to third argument.
785 | b ->vm_call_dispatch_f
787 |//-- Comparison metamethods ---------------------------------------------
795 | add CARG2, BASE, RA
801 | add CARG3, BASE, RD
804 | decode_OP1 CARG4, INS
805 | bl extern lj_meta_comp // (lua_State *L, TValue *o1, *o2, int op)
806 | // Returns 0/1 or TValue * (metamethod).
810 | subfic CRET1, CRET1, 0
814 | decode_RD4 TMP2, INS
815 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
816 | and TMP2, TMP2, CRET1
821 |->cont_ra: // RA = resultptr
824 | decode_RA8 TMP1, INS
825 | stfdx f0, BASE, TMP1
828 |->cont_condt: // RA = resultptr
830 | subfic TMP0, TMP0, LJ_TTRUE // Branch if result is true.
831 | subfe CRET1, CRET1, CRET1
835 |->cont_condf: // RA = resultptr
837 | subfic TMP0, TMP0, LJ_TTRUE // Branch if result is false.
838 | subfe CRET1, CRET1, CRET1
842 | // CARG2, CARG3, CARG4 are already set by BC_ISEQV/BC_ISNEV.
847 | bl extern lj_meta_equal // (lua_State *L, GCobj *o1, *o2, int ne)
848 | // Returns 0/1 or TValue * (metamethod).
858 | bl extern lj_meta_equal_cd // (lua_State *L, BCIns op)
859 | // Returns 0/1 or TValue * (metamethod).
863 |//-- Arithmetic metamethods ---------------------------------------------
866 | add CARG3, KBASE, RC
867 | add CARG4, BASE, RB
882 | add CARG3, BASE, RB
883 | add CARG4, KBASE, RC
887 | add CARG3, BASE, RB
888 | add CARG4, BASE, RC
899 | add CARG2, BASE, RA
903 | decode_OP1 CARG5, INS // Caveat: CARG5 overlaps INS.
904 | bl extern lj_meta_arith // (lua_State *L, TValue *ra,*rb,*rc, BCReg op)
905 | // Returns NULL (finished) or TValue * (metamethod).
909 | // Call metamethod for binary op.
911 | // BASE = old base, CRET1 = new base, stack = cont/func/o1/o2
912 | sub TMP1, CRET1, BASE
913 | stw PC, -16(CRET1) // [cont|PC]
915 | addi PC, TMP1, FRAME_CONT
917 | li NARGS8:RC, 16 // 2 args for func(o1, o2).
918 | b ->vm_call_dispatch
921 #ifdef LUAJIT_ENABLE_LUA52COMPAT
928 | bl extern lj_meta_len // (lua_State *L, TValue *o)
929 | // Returns NULL (retry) or TValue * (metamethod base).
930 #ifdef LUAJIT_ENABLE_LUA52COMPAT
932 | bne ->vmeta_binop // Binop call for compatibility.
936 | b ->vmeta_binop // Binop call for compatibility.
939 |//-- Call metamethod ----------------------------------------------------
941 |->vmeta_call: // Resolve and call __call metamethod.
942 | // TMP2 = old base, BASE = new base, RC = nargs*8
944 | stw TMP2, L->base // This is the callers base!
945 | subi CARG2, BASE, 8
947 | add CARG3, BASE, RC
948 | mr SAVE0, NARGS8:RC
949 | bl extern lj_meta_call // (lua_State *L, TValue *func, TValue *top)
950 | lwz LFUNC:RB, FRAME_FUNC(BASE) // Guaranteed to be a function here.
951 | addi NARGS8:RC, SAVE0, 8 // Got one more argument now.
954 |->vmeta_callt: // Resolve __call for BC_CALLT.
955 | // BASE = old base, RA = new base, RC = nargs*8
961 | mr SAVE0, NARGS8:RC
962 | bl extern lj_meta_call // (lua_State *L, TValue *func, TValue *top)
963 | lwz TMP1, FRAME_PC(BASE)
964 | addi NARGS8:RC, SAVE0, 8 // Got one more argument now.
965 | lwz LFUNC:RB, FRAME_FUNC(RA) // Guaranteed to be a function here.
968 |//-- Argument coercion for 'for' statement ------------------------------
976 | bl extern lj_meta_for // (lua_State *L, TValue *base)
978 | decode_OP1 TMP0, SAVE0
980 | decode_RA8 RA, SAVE0
982 | cmpwi TMP0, BC_JFORI
984 | decode_RD8 RD, SAVE0
990 |//-----------------------------------------------------------------------
991 |//-- Fast functions -----------------------------------------------------
992 |//-----------------------------------------------------------------------
998 |.macro .ffunc_1, name
1000 | cmplwi NARGS8:RC, 8
1001 | lwz CARG3, 0(BASE)
1002 | lwz CARG1, 4(BASE)
1003 | blt ->fff_fallback
1006 |.macro .ffunc_2, name
1008 | cmplwi NARGS8:RC, 16
1009 | lwz CARG3, 0(BASE)
1010 | lwz CARG4, 8(BASE)
1011 | lwz CARG1, 4(BASE)
1012 | lwz CARG2, 12(BASE)
1013 | blt ->fff_fallback
1016 |.macro .ffunc_n, name
1018 | cmplwi NARGS8:RC, 8
1019 | lwz CARG3, 0(BASE)
1020 | lfd FARG1, 0(BASE)
1021 | blt ->fff_fallback
1022 | checknum CARG3; bge ->fff_fallback
1025 |.macro .ffunc_nn, name
1027 | cmplwi NARGS8:RC, 16
1028 | lwz CARG3, 0(BASE)
1029 | lfd FARG1, 0(BASE)
1030 | lwz CARG4, 8(BASE)
1031 | lfd FARG2, 8(BASE)
1032 | blt ->fff_fallback
1033 | checknum CARG3; bge ->fff_fallback
1034 | checknum CARG4; bge ->fff_fallback
1037 |// Inlined GC threshold check. Caveat: uses TMP0 and TMP1.
1039 | lwz TMP0, DISPATCH_GL(gc.total)(DISPATCH)
1040 | lwz TMP1, DISPATCH_GL(gc.threshold)(DISPATCH)
1045 |//-- Base library: checks -----------------------------------------------
1048 | li TMP1, LJ_TFALSE
1050 | cmplw cr1, CARG3, TMP1
1051 | lwz PC, FRAME_PC(BASE)
1052 | bge cr1, ->fff_fallback
1054 | addi RD, NARGS8:RC, 8 // Compute (nresults+1)*8.
1056 | beq ->fff_res // Done if exactly 1 argument.
1061 | lfdx f0, BASE, TMP1
1062 | stfdx f0, RA, TMP1
1063 | addi TMP1, TMP1, 8
1068 | cmplwi NARGS8:RC, 8
1069 | lwz CARG1, 0(BASE)
1070 | blt ->fff_fallback
1071 | subfc TMP0, TISNUM, CARG1
1072 | subfe TMP2, CARG1, CARG1
1073 | orc TMP1, TMP2, TMP0
1074 | addi TMP1, TMP1, ~LJ_TISNUM+1
1075 | slwi TMP1, TMP1, 3
1076 | la TMP2, CFUNC:RB->upvalue
1077 | lfdx FARG1, TMP2, TMP1
1080 |//-- Base library: getters and setters ---------------------------------
1082 |.ffunc_1 getmetatable
1083 | checktab CARG3; bne >6
1084 |1: // Field metatable must be at same offset for GCtab and GCudata!
1085 | lwz TAB:CARG1, TAB:CARG1->metatable
1088 | cmplwi TAB:CARG1, 0
1089 | lwz STR:RC, DISPATCH_GL(gcroot[GCROOT_MMNAME+MM_metatable])(DISPATCH)
1091 | lwz TMP0, TAB:CARG1->hmask
1092 | li CARG3, LJ_TTAB // Use metatable as default result.
1093 | lwz TMP1, STR:RC->hash
1094 | lwz NODE:TMP2, TAB:CARG1->node
1095 | and TMP1, TMP1, TMP0 // idx = str->hash & tab->hmask
1096 | slwi TMP0, TMP1, 5
1097 | slwi TMP1, TMP1, 3
1098 | sub TMP1, TMP0, TMP1
1099 | add NODE:TMP2, NODE:TMP2, TMP1 // node = tab->node + (idx*32-idx*8)
1100 |3: // Rearranged logic, because we expect _not_ to find the key.
1101 | lwz CARG4, NODE:TMP2->key
1102 | lwz TMP0, 4+offsetof(Node, key)(NODE:TMP2)
1103 | lwz CARG2, NODE:TMP2->val
1104 | lwz TMP1, 4+offsetof(Node, val)(NODE:TMP2)
1105 | checkstr CARG4; bne >4
1106 | cmpw TMP0, STR:RC; beq >5
1108 | lwz NODE:TMP2, NODE:TMP2->next
1109 | cmplwi NODE:TMP2, 0
1110 | beq ->fff_restv // Not found, keep default result.
1114 | beq ->fff_restv // Ditto for nil value.
1115 | mr CARG3, CARG2 // Return value of mt.__metatable.
1120 | cmpwi CARG3, LJ_TUDATA; beq <1
1121 | subfc TMP0, TISNUM, CARG3
1122 | subfe TMP2, CARG3, CARG3
1123 | orc TMP1, TMP2, TMP0
1124 | addi TMP1, TMP1, ~LJ_TISNUM+1
1125 | slwi TMP1, TMP1, 2
1126 | la TMP2, DISPATCH_GL(gcroot[GCROOT_BASEMT])(DISPATCH)
1127 | lwzx TAB:CARG1, TMP2, TMP1
1130 |.ffunc_2 setmetatable
1131 | // Fast path: no mt for table yet and not clearing the mt.
1132 | checktab CARG3; bne ->fff_fallback
1133 | lwz TAB:TMP1, TAB:CARG1->metatable
1134 | checktab CARG4; bne ->fff_fallback
1135 | cmplwi TAB:TMP1, 0
1136 | lbz TMP3, TAB:CARG1->marked
1137 | bne ->fff_fallback
1138 | andi. TMP0, TMP3, LJ_GC_BLACK // isblack(table)
1139 | stw TAB:CARG2, TAB:CARG1->metatable
1141 | barrierback TAB:CARG1, TMP3, TMP0
1145 | cmplwi NARGS8:RC, 16
1146 | lwz CARG4, 0(BASE)
1147 | lwz TAB:CARG2, 4(BASE)
1148 | blt ->fff_fallback
1149 | checktab CARG4; bne ->fff_fallback
1152 | bl extern lj_tab_get // (lua_State *L, GCtab *t, cTValue *key)
1153 | // Returns cTValue *.
1154 | lfd FARG1, 0(CRET1)
1157 |//-- Base library: conversions ------------------------------------------
1160 | // Only handles the number case inline (without a base argument).
1161 | cmplwi NARGS8:RC, 8
1162 | lwz CARG1, 0(BASE)
1163 | lfd FARG1, 0(BASE)
1164 | bne ->fff_fallback // Exactly one argument.
1165 | checknum CARG1; bgt ->fff_fallback
1169 | // Only handles the string or number case inline.
1171 | // A __tostring method in the string base metatable is ignored.
1172 | beq ->fff_restv // String key?
1173 | // Handle numbers inline, unless a number base metatable is present.
1174 | lwz TMP0, DISPATCH_GL(gcroot[GCROOT_BASEMT_NUM])(DISPATCH)
1176 | cmplwi cr1, TMP0, 0
1177 | stw BASE, L->base // Add frame since C call can throw.
1178 | crorc 4*cr0+eq, 4*cr0+gt, 4*cr1+eq
1179 | stw PC, SAVE_PC // Redundant (but a defined value).
1180 | beq ->fff_fallback
1185 | bl extern lj_str_fromnumber // (lua_State *L, cTValue *o)
1187 | bl extern lj_str_fromnum // (lua_State *L, lua_Number *np)
1189 | // Returns GCstr *.
1193 |//-- Base library: iterators -------------------------------------------
1196 | cmplwi NARGS8:RC, 8
1197 | lwz CARG1, 0(BASE)
1198 | lwz TAB:CARG2, 4(BASE)
1199 | blt ->fff_fallback
1200 | stwx TISNIL, BASE, NARGS8:RC // Set missing 2nd arg to nil.
1202 | lwz PC, FRAME_PC(BASE)
1203 | bne ->fff_fallback
1204 | stw BASE, L->base // Add frame since C call can throw.
1206 | stw BASE, L->top // Dummy frame length is ok.
1209 | bl extern lj_tab_next // (lua_State *L, GCtab *t, TValue *key)
1210 | // Returns 0 at end of traversal.
1213 | beq ->fff_restv // End of traversal: return nil.
1214 | lfd f0, 8(BASE) // Copy key and value to results.
1224 | lwz PC, FRAME_PC(BASE)
1225 | bne ->fff_fallback
1226 #ifdef LUAJIT_ENABLE_LUA52COMPAT
1227 | lwz TAB:TMP2, TAB:CARG1->metatable
1228 | lfd f0, CFUNC:RB->upvalue[0]
1229 | cmplwi TAB:TMP2, 0
1231 | bne ->fff_fallback
1233 | lfd f0, CFUNC:RB->upvalue[0]
1236 | stw TISNIL, 8(BASE)
1242 | cmplwi NARGS8:RC, 16
1243 | lwz CARG3, 0(BASE)
1244 | lwz TAB:CARG1, 4(BASE)
1245 | lwz CARG4, 8(BASE)
1247 | lwz TMP2, 12(BASE)
1249 | lfd FARG2, 8(BASE)
1251 | blt ->fff_fallback
1253 | checknum cr1, CARG4
1254 | lwz PC, FRAME_PC(BASE)
1256 | bne ->fff_fallback
1257 | bne cr1, ->fff_fallback
1261 | bne ->fff_fallback
1263 | bge cr1, ->fff_fallback
1265 | toint TMP2, FARG2, f0
1267 | lwz TMP0, TAB:CARG1->asize
1268 | lwz TMP1, TAB:CARG1->array
1270 | fadd FARG2, FARG2, FARG1
1272 | addi TMP2, TMP2, 1
1277 | slwi TMP3, TMP2, 3
1280 | slwi TMP3, TMP2, 3
1283 | ble >2 // Not in array part?
1284 | lwzx TMP2, TMP1, TMP3
1285 | lfdx f0, TMP1, TMP3
1289 | beq ->fff_res // End of iteration, return 0 results.
1293 |2: // Check for empty hash part first. Otherwise call C function.
1294 | lwz TMP0, TAB:CARG1->hmask
1299 | bl extern lj_tab_getinth // (GCtab *t, int32_t key)
1300 | // Returns cTValue * or NULL.
1304 | lwz TMP2, 0(CRET1)
1310 | lwz PC, FRAME_PC(BASE)
1311 | bne ->fff_fallback
1312 #ifdef LUAJIT_ENABLE_LUA52COMPAT
1313 | lwz TAB:TMP2, TAB:CARG1->metatable
1314 | lfd f0, CFUNC:RB->upvalue[0]
1315 | cmplwi TAB:TMP2, 0
1317 | bne ->fff_fallback
1319 | lfd f0, CFUNC:RB->upvalue[0]
1323 | stw TISNUM, 8(BASE)
1327 | stw ZERO, 12(BASE)
1332 |//-- Base library: catch errors ----------------------------------------
1335 | cmplwi NARGS8:RC, 8
1336 | lbz TMP3, DISPATCH_GL(hookmask)(DISPATCH)
1337 | blt ->fff_fallback
1340 | // Remember active hook before pcall.
1341 | rlwinm TMP3, TMP3, 32-HOOK_ACTIVE_SHIFT, 31, 31
1342 | subi NARGS8:RC, NARGS8:RC, 8
1343 | addi PC, TMP3, 8+FRAME_PCALL
1344 | b ->vm_call_dispatch
1347 | cmplwi NARGS8:RC, 16
1348 | lwz CARG4, 8(BASE)
1349 | lfd FARG2, 8(BASE)
1350 | lfd FARG1, 0(BASE)
1351 | blt ->fff_fallback
1352 | lbz TMP1, DISPATCH_GL(hookmask)(DISPATCH)
1354 | checkfunc CARG4; bne ->fff_fallback // Traceback must be a function.
1356 | // Remember active hook before pcall.
1357 | rlwinm TMP1, TMP1, 32-HOOK_ACTIVE_SHIFT, 31, 31
1358 | stfd FARG2, 0(TMP2) // Swap function and traceback.
1359 | subi NARGS8:RC, NARGS8:RC, 16
1360 | stfd FARG1, 8(TMP2)
1361 | addi PC, TMP1, 16+FRAME_PCALL
1362 | b ->vm_call_dispatch
1364 |//-- Coroutine library --------------------------------------------------
1366 |.macro coroutine_resume_wrap, resume
1368 |.ffunc_1 coroutine_resume
1369 | cmpwi CARG3, LJ_TTHREAD; bne ->fff_fallback
1371 |.ffunc coroutine_wrap_aux
1372 | lwz L:CARG1, CFUNC:RB->upvalue[0].gcr
1374 | lbz TMP0, L:CARG1->status
1375 | lwz TMP1, L:CARG1->cframe
1376 | lwz CARG2, L:CARG1->top
1377 | cmplwi cr0, TMP0, LUA_YIELD
1378 | lwz TMP2, L:CARG1->base
1379 | cmplwi cr1, TMP1, 0
1380 | lwz TMP0, L:CARG1->maxstack
1381 | cmplw cr7, CARG2, TMP2
1382 | lwz PC, FRAME_PC(BASE)
1383 | crorc 4*cr6+lt, 4*cr0+gt, 4*cr1+eq // st>LUA_YIELD || cframe!=0
1384 | add TMP2, CARG2, NARGS8:RC
1385 | crandc 4*cr6+gt, 4*cr7+eq, 4*cr0+eq // base==top && st!=LUA_YIELD
1386 | cmplw cr1, TMP2, TMP0
1387 | cror 4*cr6+lt, 4*cr6+lt, 4*cr6+gt
1389 | cror 4*cr6+lt, 4*cr6+lt, 4*cr1+gt // cond1 || cond2 || stackov
1391 | blt cr6, ->fff_fallback
1394 | addi BASE, BASE, 8 // Keep resumed thread in stack for GC.
1395 | subi NARGS8:RC, NARGS8:RC, 8
1396 | subi TMP2, TMP2, 8
1398 | stw TMP2, L:CARG1->top
1401 |2: // Move args to coroutine.
1402 | cmpw TMP1, NARGS8:RC
1403 | lfdx f0, BASE, TMP1
1405 | stfdx f0, CARG2, TMP1
1406 | addi TMP1, TMP1, 8
1410 | mr L:SAVE0, L:CARG1
1412 | bl ->vm_resume // (lua_State *L, TValue *base, 0, 0)
1413 | // Returns thread status.
1415 | lwz TMP2, L:SAVE0->base
1416 | cmplwi CRET1, LUA_YIELD
1417 | lwz TMP3, L:SAVE0->top
1422 | sub RD, TMP3, TMP2
1423 | lwz TMP0, L->maxstack
1425 | add TMP1, BASE, RD
1426 | beq >6 // No results?
1429 | bgt >9 // Need to grow stack?
1432 | stw TMP2, L:SAVE0->top // Clear coroutine stack.
1433 |5: // Move results from coroutine.
1435 | lfdx f0, TMP2, TMP1
1436 | stfdx f0, BASE, TMP1
1437 | addi TMP1, TMP1, 8
1440 | andi. TMP0, PC, FRAME_TYPE
1444 | stw TMP1, -8(BASE) // Prepend true to results.
1456 |8: // Coroutine returned with error (at co->top-1).
1458 | andi. TMP0, PC, FRAME_TYPE
1460 | li TMP1, LJ_TFALSE
1462 | stw TMP3, L:SAVE0->top // Remove error from coroutine stack.
1464 | stw TMP1, -8(BASE) // Prepend false to results.
1466 | stfd f0, 0(BASE) // Copy error message.
1471 | bl extern lj_ffh_coroutine_wrap_err // (lua_State *L, lua_State *co)
1474 |9: // Handle stack expansion on return from yield.
1477 | bl extern lj_state_growstack // (lua_State *L, int n)
1482 | coroutine_resume_wrap 1 // coroutine.resume
1483 | coroutine_resume_wrap 0 // coroutine.wrap
1485 |.ffunc coroutine_yield
1486 | lwz TMP0, L->cframe
1487 | add TMP1, BASE, NARGS8:RC
1489 | andi. TMP0, TMP0, CFRAME_RESUME
1491 | li CRET1, LUA_YIELD
1492 | beq ->fff_fallback
1493 | stw ZERO, L->cframe
1494 | stb CRET1, L->status
1497 |//-- Math library -------------------------------------------------------
1503 | srawi TMP1, CARG1, 31
1504 | xor TMP2, TMP1, CARG1
1505 | sub. CARG1, TMP2, TMP1
1508 | lwz PC, FRAME_PC(BASE)
1510 | stw TISNUM, -8(BASE)
1511 | stw CRET1, -4(BASE)
1514 | lus CARG3, 0x41e0 // 2^31.
1519 | bge ->fff_fallback
1520 | rlwinm CARG3, CARG3, 0, 1, 31
1524 | // CARG3/CARG1 = TValue result.
1525 | lwz PC, FRAME_PC(BASE)
1526 | stw CARG3, -8(BASE)
1528 | stw CARG1, -4(BASE)
1530 | // RA = results, PC = return.
1533 | // RA = results, RD = (nresults+1)*8, PC = return.
1534 | andi. TMP0, PC, FRAME_TYPE
1538 | decode_RB8 RB, INS
1540 | cmplw RB, RD // More results expected?
1541 | decode_RA8 TMP0, INS
1544 | // Adjust BASE. KBASE is assumed to be set for the calling frame.
1545 | sub BASE, RA, TMP0
1548 |6: // Fill up results with nil.
1551 | stwx TISNIL, RA, TMP1
1554 |.macro math_extern, func
1555 | .ffunc_n math_ .. func
1560 |.macro math_extern2, func
1561 | .ffunc_nn math_ .. func
1566 |.macro math_round, func
1567 | .ffunc_1 math_ .. func
1568 | checknum CARG3; beqy ->fff_restv
1569 | rlwinm TMP2, CARG3, 12, 21, 31
1570 | bge ->fff_fallback
1571 | addic. TMP2, TMP2, -1023 // exp = exponent(x) - 1023
1572 | cmplwi cr1, TMP2, 31 // 0 <= exp < 31?
1573 | subfic TMP0, TMP2, 31
1575 | slwi TMP1, CARG3, 11
1576 | srwi TMP3, CARG1, 21
1577 | oris TMP1, TMP1, 0x8000
1578 | addi TMP2, TMP2, 1
1579 | or TMP1, TMP1, TMP3
1580 | slwi CARG2, CARG1, 11
1582 | slw TMP3, TMP1, TMP2
1583 | srw CARG1, TMP1, TMP0
1584 | or TMP3, TMP3, CARG2
1585 | srawi TMP2, CARG3, 31
1586 |.if "func" == "floor"
1587 | and TMP1, TMP3, TMP2
1588 | addic TMP0, TMP1, -1
1589 | subfe TMP1, TMP0, TMP1
1590 | add CARG1, CARG1, TMP1
1591 | xor CARG1, CARG1, TMP2
1592 | sub CARG1, CARG1, TMP2
1595 | andc TMP1, TMP3, TMP2
1596 | addic TMP0, TMP1, -1
1597 | subfe TMP1, TMP0, TMP1
1598 | addo. CARG1, CARG1, TMP1
1599 | xor CARG1, CARG1, TMP2
1600 | sub CARG1, CARG1, TMP2
1602 | // Potential overflow.
1603 | mcrxr cr0; bley ->fff_resi // Ignore unrelated overflow.
1604 | lus CARG3, 0x41e0 // 2^31.
1609 | add TMP2, CARG3, CARG3
1610 | srawi TMP1, CARG3, 31
1611 | or TMP2, CARG1, TMP2 // ztest = (hi+hi) | lo
1612 |.if "func" == "floor"
1613 | and TMP1, TMP2, TMP1 // (ztest & sign) == 0 ? 0 : -1
1614 | subfic TMP2, TMP1, 0
1615 | subfe CARG1, CARG1, CARG1
1617 | andc TMP1, TMP2, TMP1 // (ztest & ~sign) == 0 ? 0 : 1
1618 | addic TMP2, TMP1, -1
1619 | subfe CARG1, TMP2, TMP1
1622 |4: // exp >= 31. Check for -(2^31).
1623 | xoris TMP1, TMP1, 0x8000
1624 | srawi TMP2, CARG3, 31
1625 |.if "func" == "floor"
1626 | or TMP1, TMP1, CARG2
1628 | orc. TMP1, TMP1, TMP2
1629 | crand 4*cr0+eq, 4*cr0+eq, 4*cr1+eq
1630 | lus CARG1, 0x8000 // -(2^31).
1633 | lfd FARG1, 0(BASE)
1642 | // NYI: use internal implementation.
1661 | math_extern2 atan2
1666 | lfd FARG2, CFUNC:RB->upvalue[0]
1667 | fmul FARG1, FARG1, FARG2
1672 | cmplwi NARGS8:RC, 16
1673 | lwz CARG3, 0(BASE)
1674 | lfd FARG1, 0(BASE)
1675 | lwz CARG4, 8(BASE)
1676 | lwz CARG1, 12(BASE)
1677 | blt ->fff_fallback
1678 | checknum CARG3; bge ->fff_fallback
1679 | checknum CARG4; bne ->fff_fallback
1681 |.ffunc_nn math_ldexp
1682 | toint CARG1, FARG2
1687 |.ffunc_n math_frexp
1688 | la CARG1, DISPATCH_GL(tmptv)(DISPATCH)
1689 | lwz PC, FRAME_PC(BASE)
1691 | lwz TMP1, DISPATCH_GL(tmptv)(DISPATCH)
1694 | tonum_i FARG2, TMP1
1707 | la CARG1, -8(BASE)
1708 | lwz PC, FRAME_PC(BASE)
1711 | stfd FARG1, 0(BASE)
1715 |.macro math_minmax, name, ismax
1719 | addi TMP1, BASE, 8
1720 | add TMP2, BASE, NARGS8:RC
1722 |1: // Handle integers.
1723 | lwz CARG4, 0(TMP1)
1724 | cmplw cr1, TMP1, TMP2
1725 | lwz CARG2, 4(TMP1)
1726 | bge cr1, ->fff_resi
1728 | xoris TMP0, CARG1, 0x8000
1729 | xoris TMP3, CARG2, 0x8000
1731 | subfc TMP3, TMP3, TMP0
1732 | subfe TMP0, TMP0, TMP0
1734 | andc TMP3, TMP3, TMP0
1736 | and TMP3, TMP3, TMP0
1738 | add CARG1, TMP3, CARG2
1739 | addi TMP1, TMP1, 8
1742 | bge ->fff_fallback
1743 | // Convert intermediate result to number and continue below.
1744 | tonum_i FARG1, CARG1
1745 | lfd FARG2, 0(TMP1)
1748 | lfd FARG1, 0(BASE)
1749 | bge ->fff_fallback
1750 |5: // Handle numbers.
1751 | lwz CARG4, 0(TMP1)
1752 | cmplw cr1, TMP1, TMP2
1753 | lfd FARG2, 0(TMP1)
1754 | bge cr1, ->fff_resn
1755 | checknum CARG4; bge >7
1757 | fsub f0, FARG1, FARG2
1758 | addi TMP1, TMP1, 8
1760 | fsel FARG1, f0, FARG1, FARG2
1762 | fsel FARG1, f0, FARG2, FARG1
1765 |7: // Convert integer to number and continue above.
1766 | lwz CARG2, 4(TMP1)
1767 | bne ->fff_fallback
1768 | tonum_i FARG2, CARG2
1774 | lwzx CARG2, BASE, TMP1
1775 | lfdx FARG2, BASE, TMP1
1776 | cmplw cr1, TMP1, NARGS8:RC
1778 | bge cr1, ->fff_resn
1779 | bge ->fff_fallback
1780 | fsub f0, FARG1, FARG2
1781 | addi TMP1, TMP1, 8
1783 | fsel FARG1, f0, FARG1, FARG2
1785 | fsel FARG1, f0, FARG2, FARG1
1791 | math_minmax math_min, 0
1792 | math_minmax math_max, 1
1794 |//-- String library -----------------------------------------------------
1796 |.ffunc_1 string_len
1797 | checkstr CARG3; bne ->fff_fallback
1798 | lwz CRET1, STR:CARG1->len
1801 |.ffunc string_byte // Only handle the 1-arg case here.
1802 | cmplwi NARGS8:RC, 8
1803 | lwz CARG3, 0(BASE)
1804 | lwz STR:CARG1, 4(BASE)
1805 | bne ->fff_fallback // Need exactly 1 argument.
1807 | bne ->fff_fallback
1808 | lwz TMP0, STR:CARG1->len
1810 | lbz CARG1, STR:CARG1[1] // Access is always ok (NUL at end).
1812 | lwz PC, FRAME_PC(BASE)
1818 | lbz TMP1, STR:CARG1[1] // Access is always ok (NUL at end).
1819 | addic TMP3, TMP0, -1 // RD = ((str->len != 0)+1)*8
1820 | subfe RD, TMP3, TMP0
1821 | stw TMP1, TONUM_LO // Inlined tonum_u f0, TMP1.
1825 | lwz PC, FRAME_PC(BASE)
1826 | fsub f0, f0, TOBIT
1832 |.ffunc string_char // Only handle the 1-arg case here.
1834 | cmplwi NARGS8:RC, 8
1835 | lwz CARG3, 0(BASE)
1838 | bne ->fff_fallback // Exactly 1 argument.
1839 | checknum CARG3; bne ->fff_fallback
1842 | lfd FARG1, 0(BASE)
1843 | bne ->fff_fallback // Exactly 1 argument.
1844 | checknum CARG3; bge ->fff_fallback
1846 | la CARG2, TMPD_BLO
1849 | cmplwi TMP0, 255; bgt ->fff_fallback
1854 | bl extern lj_str_new // (lua_State *L, char *str, size_t l)
1855 | // Returns GCstr *.
1862 | cmplwi NARGS8:RC, 16
1863 | lwz CARG3, 16(BASE)
1868 | lwz STR:CARG1, 4(BASE)
1869 | blt ->fff_fallback
1870 | lwz CARG2, 8(BASE)
1872 | lwz TMP1, 12(BASE)
1880 | lwz TMP2, 20(BASE)
1881 | bne ->fff_fallback
1883 | checknum CARG2; bne ->fff_fallback
1885 | checknum CARG3; bge ->fff_fallback
1888 | checknum CARG2; bge ->fff_fallback
1890 | checkstr TMP0; bne ->fff_fallback
1894 | lwz TMP0, STR:CARG1->len
1895 | cmplw TMP0, TMP2 // len < end? (unsigned compare)
1896 | addi TMP3, TMP2, 1
1899 | cmpwi TMP1, 0 // start <= 0?
1900 | add TMP3, TMP1, TMP0
1903 | sub CARG3, TMP2, TMP1
1904 | addi CARG2, STR:CARG1, #STR-1
1905 | srawi TMP0, CARG3, 31
1906 | addi CARG3, CARG3, 1
1907 | add CARG2, CARG2, TMP1
1908 | andc CARG3, CARG3, TMP0
1911 |5: // Negative end or overflow.
1912 | sub CARG2, TMP0, TMP2
1913 | srawi CARG2, CARG2, 31
1914 | andc TMP3, TMP3, CARG2 // end = end > len ? len : end+len+1
1915 | add TMP2, TMP0, TMP3
1918 |7: // Negative start or underflow.
1919 | addic CARG3, TMP1, -1
1920 | subfe CARG3, CARG3, CARG3
1921 | srawi CARG2, TMP3, 31 // Note: modifies carry.
1922 | andc TMP3, TMP3, CARG3
1923 | andc TMP1, TMP3, CARG2
1924 | addi TMP1, TMP1, 1 // start = 1 + (start ? start+len : 0)
1927 |.ffunc string_rep // Only handle the 1-char case inline.
1929 | cmplwi NARGS8:RC, 16
1931 | lwz STR:CARG1, 4(BASE)
1932 | lwz CARG4, 8(BASE)
1934 | lwz CARG3, 12(BASE)
1936 | lfd FARG2, 8(BASE)
1938 | blt ->fff_fallback
1939 | checkstr TMP0; bne ->fff_fallback
1941 | checknum CARG4; bne ->fff_fallback
1943 | checknum CARG4; bge ->fff_fallback
1944 | toint CARG3, FARG2
1946 | lwz TMP0, STR:CARG1->len
1948 | lwz TMP1, DISPATCH_GL(tmpbuf.sz)(DISPATCH)
1949 | ble >2 // Count <= 0? (or non-int)
1951 | subi TMP2, CARG3, 1
1952 | blt >2 // Zero length string?
1953 | cmplw cr1, TMP1, CARG3
1954 | bne ->fff_fallback // Fallback for > 1-char strings.
1955 | lbz TMP0, STR:CARG1[1]
1956 | lwz CARG2, DISPATCH_GL(tmpbuf.buf)(DISPATCH)
1957 | blt cr1, ->fff_fallback
1958 |1: // Fill buffer with char. Yes, this is suboptimal code (do you care?).
1960 | stbx TMP0, CARG2, TMP2
1961 | subi TMP2, TMP2, 1
1964 |2: // Return empty string.
1965 | la STR:CARG1, DISPATCH_GL(strempty)(DISPATCH)
1969 |.ffunc string_reverse
1971 | cmplwi NARGS8:RC, 8
1972 | lwz CARG3, 0(BASE)
1973 | lwz STR:CARG1, 4(BASE)
1974 | blt ->fff_fallback
1976 | lwz TMP1, DISPATCH_GL(tmpbuf.sz)(DISPATCH)
1977 | bne ->fff_fallback
1978 | lwz CARG3, STR:CARG1->len
1979 | la CARG1, #STR(STR:CARG1)
1980 | lwz CARG2, DISPATCH_GL(tmpbuf.buf)(DISPATCH)
1983 | subi TMP3, CARG3, 1
1984 | blt ->fff_fallback
1985 |1: // Reverse string copy.
1987 | lbzx TMP1, CARG1, TMP2
1989 | stbx TMP1, CARG2, TMP3
1990 | subi TMP3, TMP3, 1
1991 | addi TMP2, TMP2, 1
1994 |.macro ffstring_case, name, lo
1997 | cmplwi NARGS8:RC, 8
1998 | lwz CARG3, 0(BASE)
1999 | lwz STR:CARG1, 4(BASE)
2000 | blt ->fff_fallback
2002 | lwz TMP1, DISPATCH_GL(tmpbuf.sz)(DISPATCH)
2003 | bne ->fff_fallback
2004 | lwz CARG3, STR:CARG1->len
2005 | la CARG1, #STR(STR:CARG1)
2006 | lwz CARG2, DISPATCH_GL(tmpbuf.buf)(DISPATCH)
2009 | blt ->fff_fallback
2010 |1: // ASCII case conversion.
2012 | lbzx TMP1, CARG1, TMP2
2014 | subi TMP0, TMP1, lo
2015 | xori TMP3, TMP1, 0x20
2016 | addic TMP0, TMP0, -26
2017 | subfe TMP3, TMP3, TMP3
2018 | andi. TMP3, TMP3, 0x20
2019 | xor TMP1, TMP1, TMP3
2020 | stbx TMP1, CARG2, TMP2
2021 | addi TMP2, TMP2, 1
2025 |ffstring_case string_lower, 65
2026 |ffstring_case string_upper, 97
2028 |//-- Table library ------------------------------------------------------
2030 |.ffunc_1 table_getn
2031 | checktab CARG3; bne ->fff_fallback
2032 | bl extern lj_tab_len // (GCtab *t)
2033 | // Returns uint32_t (but less than 2^31).
2036 |//-- Bit library --------------------------------------------------------
2038 |.macro .ffunc_bit, name
2040 | .ffunc_1 bit_..name
2041 | checknum CARG3; bnel ->fff_tobit_fb
2043 | .ffunc_n bit_..name
2044 | fadd FARG1, FARG1, TOBIT
2046 | lwz CARG1, TMPD_LO
2050 |.macro .ffunc_bit_op, name, ins
2052 | addi TMP1, BASE, 8
2053 | add TMP2, BASE, NARGS8:RC
2055 | lwz CARG4, 0(TMP1)
2056 | cmplw cr1, TMP1, TMP2
2058 | lwz CARG2, 4(TMP1)
2060 | lfd FARG1, 0(TMP1)
2062 | bgey cr1, ->fff_resi
2065 | bnel ->fff_bitop_fb
2067 | fadd FARG1, FARG1, TOBIT
2068 | bge ->fff_fallback
2070 | lwz CARG2, TMPD_LO
2072 | ins CARG1, CARG1, CARG2
2073 | addi TMP1, TMP1, 8
2077 |.ffunc_bit_op band, and
2078 |.ffunc_bit_op bor, or
2079 |.ffunc_bit_op bxor, xor
2082 | rotlwi TMP0, CARG1, 8
2083 | rlwimi TMP0, CARG1, 24, 0, 7
2084 | rlwimi TMP0, CARG1, 24, 16, 23
2092 |.macro .ffunc_bit_sh, name, ins, shmod
2094 | .ffunc_2 bit_..name
2095 | checknum CARG3; bnel ->fff_tobit_fb
2096 | // Note: no inline conversion from number for 2nd argument!
2097 | checknum CARG4; bne ->fff_fallback
2099 | .ffunc_nn bit_..name
2100 | fadd FARG1, FARG1, TOBIT
2101 | fadd FARG2, FARG2, TOBIT
2103 | lwz CARG1, TMPD_LO
2105 | lwz CARG2, TMPD_LO
2108 | rlwinm CARG2, CARG2, 0, 27, 31
2112 | ins CRET1, CARG1, CARG2
2116 |.ffunc_bit_sh lshift, slw, 1
2117 |.ffunc_bit_sh rshift, srw, 1
2118 |.ffunc_bit_sh arshift, sraw, 1
2119 |.ffunc_bit_sh rol, rotlw, 0
2120 |.ffunc_bit_sh ror, rotlw, 2
2127 | tonum_i FARG1, CRET1
2130 | lwz PC, FRAME_PC(BASE)
2132 | stfd FARG1, -8(BASE)
2135 |// Fallback FP number to bit conversion.
2138 | lfd FARG1, 0(BASE)
2139 | bgt ->fff_fallback
2140 | fadd FARG1, FARG1, TOBIT
2142 | lwz CARG1, TMPD_LO
2147 | lfd FARG1, 0(TMP1)
2148 | bgt ->fff_fallback
2149 | fadd FARG1, FARG1, TOBIT
2151 | lwz CARG2, TMPD_LO
2155 |//-----------------------------------------------------------------------
2157 |->fff_fallback: // Call fast function fallback handler.
2158 | // BASE = new base, RB = CFUNC, RC = nargs*8
2159 | lwz TMP3, CFUNC:RB->f
2160 | add TMP1, BASE, NARGS8:RC
2161 | lwz PC, FRAME_PC(BASE) // Fallback may overwrite PC.
2162 | addi TMP0, TMP1, 8*LUA_MINSTACK
2163 | lwz TMP2, L->maxstack
2164 | stw PC, SAVE_PC // Redundant (but a defined value).
2169 | bgt >5 // Need to grow stack.
2171 | bctrl // (lua_State *L)
2172 | // Either throws an error, or recovers and returns -1, 0 or nresults+1.
2177 | bgt ->fff_res // Returned nresults+1?
2178 |1: // Returned 0 or -1: retry fast path.
2180 | lwz LFUNC:RB, FRAME_FUNC(BASE)
2181 | sub NARGS8:RC, TMP0, BASE
2182 | bne ->vm_call_tail // Returned -1?
2183 | ins_callt // Returned 0: retry fast path.
2185 |// Reconstruct previous base for vmeta_call during tailcall.
2187 | andi. TMP0, PC, FRAME_TYPE
2188 | rlwinm TMP1, PC, 0, 0, 28
2191 | decode_RA8 TMP1, INS
2192 | addi TMP1, TMP1, 8
2194 | sub TMP2, BASE, TMP1
2195 | b ->vm_call_dispatch // Resolve again for tailcall.
2197 |5: // Grow stack for fallback handler.
2198 | li CARG2, LUA_MINSTACK
2199 | bl extern lj_state_growstack // (lua_State *L, int n)
2201 | cmpw TMP0, TMP0 // Set 4*cr0+eq to force retry.
2204 |->fff_gcstep: // Call GC step function.
2205 | // BASE = new base, RC = nargs*8
2208 | add TMP0, BASE, NARGS8:RC
2209 | stw PC, SAVE_PC // Redundant (but a defined value).
2212 | bl extern lj_gc_step // (lua_State *L)
2216 | sub NARGS8:RC, TMP0, BASE
2217 | lwz CFUNC:RB, FRAME_FUNC(BASE)
2220 |//-----------------------------------------------------------------------
2221 |//-- Special dispatch targets -------------------------------------------
2222 |//-----------------------------------------------------------------------
2224 |->vm_record: // Dispatch target for recording phase.
2226 | lbz TMP3, DISPATCH_GL(hookmask)(DISPATCH)
2227 | andi. TMP0, TMP3, HOOK_VMEVENT // No recording while in vmevent.
2229 | // Decrement the hookcount for consistency, but always do the call.
2230 | lwz TMP2, DISPATCH_GL(hookcount)(DISPATCH)
2231 | andi. TMP0, TMP3, HOOK_ACTIVE
2233 | subi TMP2, TMP2, 1
2234 | andi. TMP0, TMP3, LUA_MASKLINE|LUA_MASKCOUNT
2236 | stw TMP2, DISPATCH_GL(hookcount)(DISPATCH)
2240 |->vm_rethook: // Dispatch target for return hooks.
2241 | lbz TMP3, DISPATCH_GL(hookmask)(DISPATCH)
2242 | andi. TMP0, TMP3, HOOK_ACTIVE // Hook already active?
2244 |5: // Re-dispatch to static ins.
2245 | addi TMP1, TMP1, GG_DISP2STATIC // Assumes decode_OP4 TMP1, INS.
2246 | lwzx TMP0, DISPATCH, TMP1
2250 |->vm_inshook: // Dispatch target for instr/line hooks.
2251 | lbz TMP3, DISPATCH_GL(hookmask)(DISPATCH)
2252 | lwz TMP2, DISPATCH_GL(hookcount)(DISPATCH)
2253 | andi. TMP0, TMP3, HOOK_ACTIVE // Hook already active?
2254 | rlwinm TMP0, TMP3, 31-LUA_HOOKLINE, 31, 0
2257 | cmpwi cr1, TMP0, 0
2258 | addic. TMP2, TMP2, -1
2260 | stw TMP2, DISPATCH_GL(hookcount)(DISPATCH)
2265 | stw MULTRES, SAVE_MULTRES
2268 | // SAVE_PC must hold the _previous_ PC. The callee updates it with PC.
2269 | bl extern lj_dispatch_ins // (lua_State *L, const BCIns *pc)
2272 |4: // Re-dispatch to static ins.
2274 | decode_OP4 TMP1, INS
2275 | decode_RB8 RB, INS
2276 | addi TMP1, TMP1, GG_DISP2STATIC
2277 | decode_RD8 RD, INS
2278 | lwzx TMP0, DISPATCH, TMP1
2279 | decode_RA8 RA, INS
2280 | decode_RC8 RC, INS
2284 |->cont_hook: // Continue from hook yield.
2286 | lwz MULTRES, -20(RB) // Restore MULTRES for *M ins.
2289 |->vm_hotloop: // Hot loop counter underflow.
2291 | lwz LFUNC:TMP1, FRAME_FUNC(BASE)
2292 | addi CARG1, DISPATCH, GG_DISP2J
2294 | lwz TMP1, LFUNC:TMP1->pc
2296 | stw L, DISPATCH_J(L)(DISPATCH)
2297 | lbz TMP1, PC2PROTO(framesize)(TMP1)
2299 | slwi TMP1, TMP1, 3
2300 | add TMP1, BASE, TMP1
2302 | bl extern lj_trace_hot // (jit_State *J, const BCIns *pc)
2306 |->vm_callhook: // Dispatch target for call hooks.
2312 |->vm_hotcall: // Hot call counter underflow.
2317 | add TMP0, BASE, RC
2323 | bl extern lj_dispatch_call // (lua_State *L, const BCIns *pc)
2324 | // Returns ASMFunction.
2327 | stw ZERO, SAVE_PC // Invalidate for subsequent line hook.
2328 | sub NARGS8:RC, TMP0, BASE
2330 | lwz LFUNC:RB, FRAME_FUNC(BASE)
2335 |//-----------------------------------------------------------------------
2336 |//-- Trace exit handler -------------------------------------------------
2337 |//-----------------------------------------------------------------------
2339 |.macro savex_, a, b, c, d
2340 | stfd f..a, 16+a*8(sp)
2341 | stfd f..b, 16+b*8(sp)
2342 | stfd f..c, 16+c*8(sp)
2343 | stfd f..d, 16+d*8(sp)
2348 | addi sp, sp, -(16+32*8+32*4)
2349 | stmw r2, 16+32*8+2*4(sp)
2350 | addi DISPATCH, JGL, -GG_DISP2G-32768
2351 | li CARG2, ~LJ_VMST_EXIT
2352 | lwz CARG1, 16+32*8+32*4(sp) // Get stack chain.
2353 | stw CARG2, DISPATCH_GL(vmstate)(DISPATCH)
2355 | stw CARG1, 0(sp) // Store extended stack chain.
2356 | mcrxr cr0 // Clear SO flag.
2358 | addi CARG2, sp, 16+32*8+32*4 // Recompute original value of sp.
2360 | stw CARG2, 16+32*8+1*4(sp) // Store sp in RID_SP.
2361 | savex_ 12,13,14,15
2364 | savex_ 16,17,18,19
2365 | stw TMP1, 16+32*8+0*4(sp) // Clear RID_TMP.
2366 | savex_ 20,21,22,23
2367 | lhz CARG4, 2(CARG3) // Load trace number.
2368 | savex_ 24,25,26,27
2369 | lwz L, DISPATCH_GL(jit_L)(DISPATCH)
2370 | savex_ 28,29,30,31
2371 | sub CARG3, TMP0, CARG3 // Compute exit number.
2372 | lwz BASE, DISPATCH_GL(jit_base)(DISPATCH)
2373 | srwi CARG3, CARG3, 2
2374 | stw L, DISPATCH_J(L)(DISPATCH)
2375 | subi CARG3, CARG3, 2
2376 | stw TMP1, DISPATCH_GL(jit_L)(DISPATCH)
2377 | stw CARG4, DISPATCH_J(parent)(DISPATCH)
2379 | addi CARG1, DISPATCH, GG_DISP2J
2380 | stw CARG3, DISPATCH_J(exitno)(DISPATCH)
2381 | addi CARG2, sp, 16
2382 | bl extern lj_trace_exit // (jit_State *J, ExitState *ex)
2383 | // Returns MULTRES (unscaled) or negated error code.
2384 | lwz TMP1, L->cframe
2387 | rlwinm sp, TMP1, 0, 0, 29
2388 | lwz PC, SAVE_PC // Get SAVE_PC.
2390 | stw L, SAVE_L // Set SAVE_L (on-trace resume/yield).
2395 | // CARG1 = MULTRES or negated error code, BASE, PC and JGL set.
2397 | addi DISPATCH, JGL, -GG_DISP2G-32768
2400 | blt >3 // Check for error from exit.
2401 | lwz LFUNC:TMP1, FRAME_FUNC(BASE)
2402 | slwi MULTRES, CARG1, 3
2404 | stw MULTRES, SAVE_MULTRES
2405 | lwz TMP1, LFUNC:TMP1->pc
2406 | stw TMP2, DISPATCH_GL(jit_L)(DISPATCH)
2407 | lwz KBASE, PC2PROTO(k)(TMP1)
2408 | // Setup type comparison constants.
2409 | li TISNUM, LJ_TISNUM
2410 | lus TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float).
2413 | ori TMP3, TMP3, 0x0004 // TONUM = 2^52 + 2^51 + 2^31 (float).
2416 | lus TMP0, 0x4338 // Hiword of 2^52 + 2^51 (double)
2417 | li TISNIL, LJ_TNIL
2418 | stw TMP0, TONUM_HI
2420 | // Modified copy of ins_next which handles function header dispatch, too.
2423 | // Assumes TISNIL == ~LJ_VMST_INTERP == -1.
2424 | stw TISNIL, DISPATCH_GL(vmstate)(DISPATCH)
2425 | decode_OP4 TMP1, INS
2426 | decode_RA8 RA, INS
2427 | lwzx TMP0, DISPATCH, TMP1
2429 | cmplwi TMP1, BC_FUNCF*4 // Function header?
2431 | decode_RB8 RB, INS
2432 | decode_RD8 RD, INS
2433 | decode_RC8 RC, INS
2436 | subi RC, MULTRES, 8
2440 |3: // Rethrow error from the right C frame.
2443 | bl extern lj_err_throw // (lua_State *L, int errcode)
2446 |//-----------------------------------------------------------------------
2447 |//-- Math helper functions ----------------------------------------------
2448 |//-----------------------------------------------------------------------
2450 | // NYI: Use internal implementation.
2461 | divwo. TMP0, CARG1, CARG2
2463 | xor. CARG3, CARG1, CARG2
2464 | mullw TMP0, TMP0, CARG2
2465 | sub CARG1, CARG1, TMP0
2467 | cmpwi CARG1, 0; beqlr
2468 | add CARG1, CARG1, CARG2
2474 | mcrxr cr0 // Clear SO for -2147483648 % -1 and return 0.
2477 |// Callable from C: double lj_vm_foldarith(double x, double y, int op)
2478 |// Compute x op y for basic arithmetic operators (+ - * / % ^ and unary -)
2479 |// and basic math functions. ORDER ARITH
2483 | fadd FARG1, FARG1, FARG2; blr
2485 | fsub FARG1, FARG1, FARG2; blr
2487 | cmplwi CARG1, 3; beq >1; bgt >2
2488 | fmul FARG1, FARG1, FARG2; blr
2490 | fdiv FARG1, FARG1, FARG2; blr
2492 | cmplwi CARG1, 5; beq >1; bgt >2
2493 | // NYI: Use internal implementation of floor and avoid spills.
2494 | stwu sp, -32(sp); stfd f14, 16(sp); stfd f15, 24(sp)
2497 | fdiv FARG1, FARG1, FARG2
2502 | fmul FARG1, FARG1, f15
2504 | fsub FARG1, f14, FARG1
2505 | lfd f14, 16(sp); lfd f15, 24(sp); addi sp, sp, 32; blr
2509 | cmplwi CARG1, 7; beq >1; bgt >2
2510 | fneg FARG1, FARG1; blr
2512 | fabs FARG1, FARG1; blr
2515 | cmplwi CARG1, 9; beq >9; bgt >2
2517 | // No support needed for IR_LDEXP.
2519 | cmplwi CARG1, 11; bgt >9
2520 | fsub f0, FARG1, FARG2
2522 | fsel FARG1, f0, FARG2, FARG1 // IR_MAX
2525 | fsel FARG1, f0, FARG1, FARG2 // IR_MIN
2530 | NYI // Other operations only needed by JIT compiler.
2533 |//-----------------------------------------------------------------------
2534 |//-- Miscellaneous functions --------------------------------------------
2535 |//-----------------------------------------------------------------------
2537 |// void lj_vm_cachesync(void *start, void *end)
2538 |// Flush D-Cache and invalidate I-Cache. Assumes 32 byte cache line size.
2539 |// This is a good lower bound, except for very ancient PPC models.
2541 | // Compute start of first cache line and number of cache lines.
2542 | rlwinm CARG1, CARG1, 0, 0, 26
2543 | sub CARG2, CARG2, CARG1
2544 | addi CARG2, CARG2, 31
2545 | rlwinm. CARG2, CARG2, 27, 5, 31
2549 |1: // Flush D-Cache.
2551 | addi CARG1, CARG1, 32
2555 |1: // Invalidate I-Cache.
2557 | addi CARG3, CARG3, 32
2562 |//-----------------------------------------------------------------------
2563 |//-- FFI helper functions -----------------------------------------------
2564 |//-----------------------------------------------------------------------
2566 |// Handler for callback functions. Callback slot number in r11, g in r12.
2569 |.type CTSTATE, CTState, PC
2571 | lwz CTSTATE, GL:r12->ctype_state
2572 | addi DISPATCH, r12, GG_G2DISP
2573 | stw r11, CTSTATE->cb.slot
2574 | stw r3, CTSTATE->cb.gpr[0]
2575 | stfd f1, CTSTATE->cb.fpr[0]
2576 | stw r4, CTSTATE->cb.gpr[1]
2577 | stfd f2, CTSTATE->cb.fpr[1]
2578 | stw r5, CTSTATE->cb.gpr[2]
2579 | stfd f3, CTSTATE->cb.fpr[2]
2580 | stw r6, CTSTATE->cb.gpr[3]
2581 | stfd f4, CTSTATE->cb.fpr[3]
2582 | stw r7, CTSTATE->cb.gpr[4]
2583 | stfd f5, CTSTATE->cb.fpr[4]
2584 | stw r8, CTSTATE->cb.gpr[5]
2585 | stfd f6, CTSTATE->cb.fpr[5]
2586 | stw r9, CTSTATE->cb.gpr[6]
2587 | stfd f7, CTSTATE->cb.fpr[6]
2588 | stw r10, CTSTATE->cb.gpr[7]
2589 | stfd f8, CTSTATE->cb.fpr[7]
2590 | addi TMP0, sp, CFRAME_SPACE+8
2591 | stw TMP0, CTSTATE->cb.stack
2593 | stw CTSTATE, SAVE_PC // Any value outside of bytecode is ok.
2595 | bl extern lj_ccallback_enter // (CTState *cts, void *cf)
2596 | // Returns lua_State *.
2597 | lwz BASE, L:CRET1->base
2598 | li TISNUM, LJ_TISNUM // Setup type comparison constants.
2599 | lwz RC, L:CRET1->top
2600 | lus TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float).
2604 | lus TMP0, 0x4338 // Hiword of 2^52 + 2^51 (double)
2605 | lwz LFUNC:RB, FRAME_FUNC(BASE)
2606 | ori TMP3, TMP3, 0x0004 // TONUM = 2^52 + 2^51 + 2^31 (float).
2607 | stw TMP0, TONUM_HI
2608 | li TISNIL, LJ_TNIL
2618 |->cont_ffi_callback: // Return from FFI callback.
2620 | lwz CTSTATE, DISPATCH_GL(ctype_state)(DISPATCH)
2626 | bl extern lj_ccallback_leave // (CTState *cts, TValue *o)
2627 | lwz CRET1, CTSTATE->cb.gpr[0]
2628 | lfd FARG1, CTSTATE->cb.fpr[0]
2629 | lwz CRET2, CTSTATE->cb.gpr[1]
2633 |->vm_ffi_call: // Call C function via FFI.
2634 | // Caveat: needs special frame unwinding, see below.
2636 | .type CCSTATE, CCallState, CARG1
2637 | lwz TMP1, CCSTATE->spadj
2639 | lbz CARG2, CCSTATE->nsp
2640 | lbz CARG3, CCSTATE->nfpr
2643 | cmpwi cr1, CARG3, 0
2645 | addic. CARG2, CARG2, -1
2646 | stwux sp, sp, TMP1
2647 | crnot 4*cr1+eq, 4*cr1+eq // For vararg calls.
2649 | stw CCSTATE, -8(TMP2)
2651 | la TMP1, CCSTATE->stack
2652 | slwi CARG2, CARG2, 2
2656 | lwzx TMP0, TMP1, CARG2
2657 | stwx TMP0, TMP2, CARG2
2658 | addic. CARG2, CARG2, -4
2662 | lfd f1, CCSTATE->fpr[0]
2663 | lfd f2, CCSTATE->fpr[1]
2664 | lfd f3, CCSTATE->fpr[2]
2665 | lfd f4, CCSTATE->fpr[3]
2666 | lfd f5, CCSTATE->fpr[4]
2667 | lfd f6, CCSTATE->fpr[5]
2668 | lfd f7, CCSTATE->fpr[6]
2669 | lfd f8, CCSTATE->fpr[7]
2671 | lwz TMP0, CCSTATE->func
2672 | lwz CARG2, CCSTATE->gpr[1]
2673 | lwz CARG3, CCSTATE->gpr[2]
2674 | lwz CARG4, CCSTATE->gpr[3]
2675 | lwz CARG5, CCSTATE->gpr[4]
2677 | lwz r8, CCSTATE->gpr[5]
2678 | lwz r9, CCSTATE->gpr[6]
2679 | lwz r10, CCSTATE->gpr[7]
2680 | lwz CARG1, CCSTATE->gpr[0] // Do this last, since CCSTATE is CARG1.
2682 | lwz CCSTATE:TMP1, -8(r14)
2685 | stw CARG1, CCSTATE:TMP1->gpr[0]
2686 | stfd FARG1, CCSTATE:TMP1->fpr[0]
2687 | stw CARG2, CCSTATE:TMP1->gpr[1]
2689 | stw CARG3, CCSTATE:TMP1->gpr[2]
2691 | stw CARG4, CCSTATE:TMP1->gpr[3]
2695 |// Note: vm_ffi_call must be the last function in this object file!
2697 |//-----------------------------------------------------------------------
2700 /* Generate the code for a single instruction. */
2701 static void build_ins(BuildCtx *ctx, BCOp op, int defop)
2708 /* -- Comparison ops ---------------------------------------------------- */
2710 /* Remember: all ops branch for a true comparison, fall through otherwise. */
2712 case BC_ISLT: case BC_ISGE: case BC_ISLE: case BC_ISGT:
2713 | // RA = src1*8, RD = src2*8, JMP with RD = target
2715 | lwzux TMP0, RA, BASE
2718 | lwzux TMP1, RD, BASE
2720 | checknum cr0, TMP0
2722 | decode_RD4 TMP2, TMP2
2723 | checknum cr1, TMP1
2724 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
2728 if (op == BC_ISLT) {
2730 } else if (op == BC_ISGE) {
2732 } else if (op == BC_ISLE) {
2742 |7: // RA is not an integer.
2743 | bgt cr0, ->vmeta_comp
2744 | // RA is a number.
2746 | bgt cr1, ->vmeta_comp
2748 | // RA is a number, RD is an integer.
2752 |8: // RA is an integer, RD is not an integer.
2753 | bgt cr1, ->vmeta_comp
2754 | // RA is an integer, RD is a number.
2760 if (op == BC_ISLT) {
2762 } else if (op == BC_ISGE) {
2764 } else if (op == BC_ISLE) {
2765 | cror 4*cr0+lt, 4*cr0+lt, 4*cr0+eq
2768 | cror 4*cr0+lt, 4*cr0+lt, 4*cr0+eq
2773 | lwzx TMP0, BASE, RA
2776 | lwzx TMP1, BASE, RD
2777 | checknum cr0, TMP0
2780 | checknum cr1, TMP1
2781 | decode_RD4 TMP2, TMP2
2782 | bge cr0, ->vmeta_comp
2783 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
2784 | bge cr1, ->vmeta_comp
2786 if (op == BC_ISLT) {
2788 } else if (op == BC_ISGE) {
2790 } else if (op == BC_ISLE) {
2791 | cror 4*cr0+lt, 4*cr0+lt, 4*cr0+eq
2794 | cror 4*cr0+lt, 4*cr0+lt, 4*cr0+eq
2803 case BC_ISEQV: case BC_ISNEV:
2804 vk = op == BC_ISEQV;
2805 | // RA = src1*8, RD = src2*8, JMP with RD = target
2807 | lwzux TMP0, RA, BASE
2810 | lwzux TMP1, RD, BASE
2811 | checknum cr0, TMP0
2813 | checknum cr1, TMP1
2814 | decode_RD4 TMP2, TMP2
2816 | cror 4*cr7+gt, 4*cr0+gt, 4*cr1+gt
2817 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
2819 | ble cr7, ->BC_ISEQN_Z
2821 | ble cr7, ->BC_ISNEN_Z
2824 | lwzux TMP0, RA, BASE
2828 | lwzux TMP1, RD, BASE
2829 | checknum cr0, TMP0
2830 | decode_RD4 TMP2, TMP2
2832 | checknum cr1, TMP1
2833 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
2847 |5: // Either or both types are not numbers.
2853 | cmpwi cr7, TMP0, LJ_TCDATA
2854 | cmpwi cr5, TMP1, LJ_TCDATA
2858 | cmplwi cr1, TMP3, ~LJ_TISPRI // Primitive?
2860 | cror 4*cr7+eq, 4*cr7+eq, 4*cr5+eq
2862 | cmplwi cr6, TMP3, ~LJ_TISTABUD // Table or userdata?
2864 | beq cr7, ->vmeta_equal_cd
2866 | cmplw cr5, CARG2, CARG3
2867 | crandc 4*cr0+gt, 4*cr0+eq, 4*cr1+gt // 2: Same type and primitive.
2868 | crorc 4*cr0+lt, 4*cr5+eq, 4*cr0+eq // 1: Same tv or different type.
2869 | crand 4*cr0+eq, 4*cr0+eq, 4*cr5+eq // 0: Same type and same tv.
2871 | cror 4*cr0+eq, 4*cr0+eq, 4*cr0+gt // 0 or 2.
2872 | cror 4*cr0+lt, 4*cr0+lt, 4*cr0+gt // 1 or 2.
2883 | bge cr0, >2 // Done if 1 or 2.
2888 | blt cr0, <1 // Done if 1 or 2.
2890 | blt cr6, <1 // Done if not tab/ud.
2892 | // Different tables or userdatas. Need to check __eq metamethod.
2893 | // Field metatable must be at same offset for GCtab and GCudata!
2894 | lwz TAB:TMP2, TAB:CARG2->metatable
2895 | li CARG4, 1-vk // ne = 0 or 1.
2896 | cmplwi TAB:TMP2, 0
2897 | beq <1 // No metatable?
2898 | lbz TMP2, TAB:TMP2->nomm
2899 | andi. TMP2, TMP2, 1<<MM_eq
2900 | bne <1 // Or 'no __eq' flag set?
2901 | mr PC, SAVE0 // Restore old PC.
2902 | b ->vmeta_equal // Handle __eq metamethod.
2905 case BC_ISEQS: case BC_ISNES:
2906 vk = op == BC_ISEQS;
2907 | // RA = src*8, RD = str_const*8 (~), JMP with RD = target
2908 | lwzux TMP0, RA, BASE
2910 | lwz STR:TMP3, 4(RA)
2915 | cmpwi TMP0, LJ_TCDATA
2917 | lwzx STR:TMP1, KBASE, RD // KBASE-4-str_const*4
2918 | subfic TMP0, TMP0, LJ_TSTR
2920 | beq ->vmeta_equal_cd
2922 | sub TMP1, STR:TMP1, STR:TMP3
2923 | or TMP0, TMP0, TMP1
2924 | decode_RD4 TMP2, TMP2
2925 | subfic TMP0, TMP0, 0
2926 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
2927 | subfe TMP1, TMP1, TMP1
2929 | andc TMP2, TMP2, TMP1
2931 | and TMP2, TMP2, TMP1
2937 case BC_ISEQN: case BC_ISNEN:
2938 vk = op == BC_ISEQN;
2939 | // RA = src*8, RD = num_const*8, JMP with RD = target
2941 | lwzux TMP0, RA, BASE
2944 | lwzux TMP1, RD, KBASE
2945 | checknum cr0, TMP0
2947 | checknum cr1, TMP1
2948 | decode_RD4 TMP2, TMP2
2950 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
2962 |->BC_ISEQN_Z: // Dummy label.
2964 |->BC_ISNEN_Z: // Dummy label.
2966 | lwzx TMP0, BASE, RA
2970 | lfdx f1, KBASE, RD
2971 | decode_RD4 TMP2, TMP2
2973 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
2996 | cmpwi TMP0, LJ_TCDATA
2997 | beq ->vmeta_equal_cd
3001 |7: // RA is not an integer.
3003 | // RA is a number.
3006 | // RA is a number, RD is an integer.
3010 |8: // RA is an integer, RD is a number.
3020 case BC_ISEQP: case BC_ISNEP:
3021 vk = op == BC_ISEQP;
3022 | // RA = src*8, RD = primitive_type*8 (~), JMP with RD = target
3023 | lwzx TMP0, BASE, RA
3029 | cmpwi TMP0, LJ_TCDATA
3031 | sub TMP0, TMP0, TMP1
3033 | beq ->vmeta_equal_cd
3035 | decode_RD4 TMP2, TMP2
3036 | addic TMP0, TMP0, -1
3037 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
3038 | subfe TMP1, TMP1, TMP1
3040 | and TMP2, TMP2, TMP1
3042 | andc TMP2, TMP2, TMP1
3048 /* -- Unary test and copy ops ------------------------------------------- */
3050 case BC_ISTC: case BC_ISFC: case BC_IST: case BC_ISF:
3051 | // RA = dst*8 or unused, RD = src*8, JMP with RD = target
3052 | lwzx TMP0, BASE, RD
3055 if (op == BC_IST || op == BC_ISF) {
3056 | subfic TMP0, TMP0, LJ_TTRUE
3057 | decode_RD4 TMP2, INS
3058 | subfe TMP1, TMP1, TMP1
3059 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
3061 | andc TMP2, TMP2, TMP1
3063 | and TMP2, TMP2, TMP1
3067 | li TMP1, LJ_TFALSE
3070 if (op == BC_ISTC) {
3075 | addis PC, PC, -(BCBIAS_J*4 >> 16)
3076 | decode_RD4 TMP2, INS
3077 | stfdx f0, BASE, RA
3084 /* -- Unary ops --------------------------------------------------------- */
3087 | // RA = dst*8, RD = src*8
3090 | stfdx f0, BASE, RA
3094 | // RA = dst*8, RD = src*8
3096 | lwzx TMP0, BASE, RD
3097 | subfic TMP1, TMP0, LJ_TTRUE
3098 | adde TMP0, TMP0, TMP1
3099 | stwx TMP0, BASE, RA
3103 | // RA = dst*8, RD = src*8
3104 | lwzux TMP1, RD, BASE
3113 | stwux TISNUM, RA, BASE
3117 |4: // Potential overflow.
3118 | mcrxr cr0; bley <1 // Ignore unrelated overflow.
3119 | lus TMP1, 0x41e0 // 2^31.
3125 | xoris TMP1, TMP1, 0x8000
3128 | stwux TMP1, RA, BASE
3137 | // RA = dst*8, RD = src*8
3138 | lwzux TMP0, RD, BASE
3140 | checkstr TMP0; bne >2
3141 | lwz CRET1, STR:CARG1->len
3145 | stwux TISNUM, RA, BASE
3148 | tonum_u f0, CRET1 // Result is a non-negative integer.
3150 | stfdx f0, BASE, RA
3154 | checktab TMP0; bne ->vmeta_len
3155 #ifdef LUAJIT_ENABLE_LUA52COMPAT
3156 | lwz TAB:TMP2, TAB:CARG1->metatable
3157 | cmplwi TAB:TMP2, 0
3162 | bl extern lj_tab_len // (GCtab *t)
3163 | // Returns uint32_t (but less than 2^31).
3165 #ifdef LUAJIT_ENABLE_LUA52COMPAT
3167 | lbz TMP0, TAB:TMP2->nomm
3168 | andi. TMP0, TMP0, 1<<MM_len
3169 | bne <3 // 'no __len' flag set: done.
3174 /* -- Binary ops -------------------------------------------------------- */
3176 |.macro ins_arithpre
3177 | // RA = dst*8, RB = src1*8, RC = src2*8 | num_const*8
3178 ||vk = ((int)op - BC_ADDVN) / (BC_ADDNV-BC_ADDVN);
3181 | lwzx TMP1, BASE, RB
3183 | lwzx TMP2, KBASE, RC
3185 | lfdx f14, BASE, RB
3186 | lfdx f15, KBASE, RC
3188 | checknum cr0, TMP1
3189 | checknum cr1, TMP2
3190 | crand 4*cr0+lt, 4*cr0+lt, 4*cr1+lt
3191 | bge ->vmeta_arith_vn
3193 | checknum TMP1; bge ->vmeta_arith_vn
3197 | lwzx TMP1, BASE, RB
3199 | lwzx TMP2, KBASE, RC
3201 | lfdx f15, BASE, RB
3202 | lfdx f14, KBASE, RC
3204 | checknum cr0, TMP1
3205 | checknum cr1, TMP2
3206 | crand 4*cr0+lt, 4*cr0+lt, 4*cr1+lt
3207 | bge ->vmeta_arith_nv
3209 | checknum TMP1; bge ->vmeta_arith_nv
3213 | lwzx TMP1, BASE, RB
3214 | lwzx TMP2, BASE, RC
3215 | lfdx f14, BASE, RB
3216 | lfdx f15, BASE, RC
3217 | checknum cr0, TMP1
3218 | checknum cr1, TMP2
3219 | crand 4*cr0+lt, 4*cr0+lt, 4*cr1+lt
3220 | bge ->vmeta_arith_vv
3225 |.macro ins_arithfallback, ins
3228 | ins ->vmeta_arith_vn2
3231 | ins ->vmeta_arith_nv2
3234 | ins ->vmeta_arith_vv2
3239 |.macro intmod, a, b, c
3243 |.macro fpmod, a, b, c
3246 | // NYI: Use internal implementation of floor.
3247 | bl extern floor // floor(b/c)
3249 | fsub a, b, a // b - floor(b/c)*c
3252 |.macro ins_arithfp, fpins
3254 |.if "fpins" == "fpmod_"
3255 | b ->BC_MODVN_Z // Avoid 3 copies. It's slow anyway.
3257 | fpins f0, f14, f15
3259 | stfdx f0, BASE, RA
3264 |.macro ins_arithdn, intins, fpins
3265 | // RA = dst*8, RB = src1*8, RC = src2*8 | num_const*8
3266 ||vk = ((int)op - BC_ADDVN) / (BC_ADDNV-BC_ADDVN);
3269 | lwzux TMP1, RB, BASE
3270 | lwzux TMP2, RC, KBASE
3272 | checknum cr0, TMP1
3276 | lwzux TMP1, RB, BASE
3277 | lwzux TMP2, RC, KBASE
3279 | checknum cr0, TMP1
3283 | lwzux TMP1, RB, BASE
3284 | lwzux TMP2, RC, BASE
3286 | checknum cr0, TMP1
3290 | checknum cr1, TMP2
3293 | intins CARG1, CARG1, CARG2
3297 | stwux TISNUM, RA, BASE
3302 | mcrxr cr0; bley <1 // Ignore unrelated overflow.
3303 | ins_arithfallback b
3307 | crand 4*cr0+lt, 4*cr0+lt, 4*cr1+lt
3311 | crand 4*cr0+lt, 4*cr0+lt, 4*cr1+lt
3314 | ins_arithfallback bge
3315 |.if "fpins" == "fpmod_"
3316 | b ->BC_MODVN_Z // Avoid 3 copies. It's slow anyway.
3318 | fpins f0, f14, f15
3320 | stfdx f0, BASE, RA
3325 |.macro ins_arith, intins, fpins
3327 | ins_arithdn intins, fpins
3333 case BC_ADDVN: case BC_ADDNV: case BC_ADDVV:
3334 | ins_arith addo., fadd
3336 case BC_SUBVN: case BC_SUBNV: case BC_SUBVV:
3337 | ins_arith subo., fsub
3339 case BC_MULVN: case BC_MULNV: case BC_MULVV:
3340 | ins_arith mullwo., fmul
3342 case BC_DIVVN: case BC_DIVNV: case BC_DIVVV:
3346 | ins_arith intmod, fpmod
3348 case BC_MODNV: case BC_MODVV:
3349 | ins_arith intmod, fpmod_
3352 | // NYI: (partial) integer arithmetic.
3353 | lwzx TMP1, BASE, RB
3354 | lfdx FARG1, BASE, RB
3355 | lwzx TMP2, BASE, RC
3356 | lfdx FARG2, BASE, RC
3357 | checknum cr0, TMP1
3358 | checknum cr1, TMP2
3359 | crand 4*cr0+lt, 4*cr0+lt, 4*cr1+lt
3360 | bge ->vmeta_arith_vv
3363 | stfdx FARG1, BASE, RA
3368 | // RA = dst*8, RB = src_start*8, RC = src_end*8
3371 | add CARG2, BASE, RC
3376 | srwi CARG3, CARG3, 3
3377 | bl extern lj_meta_cat // (lua_State *L, TValue *top, int left)
3378 | // Returns NULL (finished) or TValue * (metamethod).
3383 | lfdx f0, BASE, SAVE0 // Copy result from RB to RA.
3384 | stfdx f0, BASE, RA
3388 /* -- Constant ops ------------------------------------------------------ */
3391 | // RA = dst*8, RD = str_const*8 (~)
3393 | subfic TMP1, TMP1, -4
3395 | lwzx TMP0, KBASE, TMP1 // KBASE-4-str_const*4
3397 | stwux TMP2, RA, BASE
3403 | // RA = dst*8, RD = cdata_const*8 (~)
3405 | subfic TMP1, TMP1, -4
3407 | lwzx TMP0, KBASE, TMP1 // KBASE-4-cdata_const*4
3408 | li TMP2, LJ_TCDATA
3409 | stwux TMP2, RA, BASE
3415 | // RA = dst*8, RD = int16_literal*8
3420 | stwux TISNUM, RA, BASE
3424 | // The soft-float approach is faster.
3426 | srawi TMP1, RD, 31
3427 | xor TMP2, TMP1, RD
3428 | sub TMP2, TMP2, TMP1 // TMP2 = abs(x)
3430 | subfic TMP1, TMP3, 0x40d // TMP1 = exponent-1
3431 | slw TMP2, TMP2, TMP3 // TMP2 = left aligned mantissa
3432 | subfic TMP3, RD, 0
3433 | slwi TMP1, TMP1, 20
3434 | rlwimi RD, TMP2, 21, 1, 31 // hi = sign(x) | (mantissa>>11)
3435 | subfe TMP0, TMP0, TMP0
3436 | add RD, RD, TMP1 // hi = hi + exponent-1
3437 | and RD, RD, TMP0 // hi = x == 0 ? 0 : hi
3439 | stwux RD, RA, BASE
3445 | // RA = dst*8, RD = num_const*8
3447 | lfdx f0, KBASE, RD
3448 | stfdx f0, BASE, RA
3452 | // RA = dst*8, RD = primitive_type*8 (~)
3456 | stwx TMP0, BASE, RA
3460 | // RA = base*8, RD = end*8
3461 | stwx TISNIL, BASE, RA
3464 | stwx TISNIL, BASE, RA
3471 /* -- Upvalue and function ops ------------------------------------------ */
3474 | // RA = dst*8, RD = uvnum*8
3475 | lwz LFUNC:RB, FRAME_FUNC(BASE)
3477 | addi RD, RD, offsetof(GCfuncL, uvptr)
3478 | lwzx UPVAL:RB, LFUNC:RB, RD
3480 | lwz TMP1, UPVAL:RB->v
3482 | stfdx f0, BASE, RA
3486 | // RA = uvnum*8, RD = src*8
3487 | lwz LFUNC:RB, FRAME_FUNC(BASE)
3489 | addi RA, RA, offsetof(GCfuncL, uvptr)
3490 | lfdux f0, RD, BASE
3491 | lwzx UPVAL:RB, LFUNC:RB, RA
3492 | lbz TMP3, UPVAL:RB->marked
3493 | lwz CARG2, UPVAL:RB->v
3494 | andi. TMP3, TMP3, LJ_GC_BLACK // isblack(uv)
3495 | lbz TMP0, UPVAL:RB->closed
3498 | cmplwi cr1, TMP0, 0
3500 | cror 4*cr0+eq, 4*cr0+eq, 4*cr1+eq
3501 | subi TMP2, TMP2, (LJ_TISNUM+1)
3502 | bne >2 // Upvalue is closed and black?
3506 |2: // Check if new value is collectable.
3507 | cmplwi TMP2, LJ_TISGCV - (LJ_TISNUM+1)
3508 | bge <1 // tvisgcv(v)
3509 | lbz TMP3, GCOBJ:TMP1->gch.marked
3510 | andi. TMP3, TMP3, LJ_GC_WHITES // iswhite(v)
3511 | la CARG1, GG_DISP2G(DISPATCH)
3512 | // Crossed a write barrier. Move the barrier forward.
3514 | bl extern lj_gc_barrieruv // (global_State *g, TValue *tv)
3518 | // RA = uvnum*8, RD = str_const*8 (~)
3519 | lwz LFUNC:RB, FRAME_FUNC(BASE)
3522 | subfic TMP1, TMP1, -4
3523 | addi RA, RA, offsetof(GCfuncL, uvptr)
3524 | lwzx STR:TMP1, KBASE, TMP1 // KBASE-4-str_const*4
3525 | lwzx UPVAL:RB, LFUNC:RB, RA
3526 | lbz TMP3, UPVAL:RB->marked
3527 | lwz CARG2, UPVAL:RB->v
3528 | andi. TMP3, TMP3, LJ_GC_BLACK // isblack(uv)
3529 | lbz TMP3, STR:TMP1->marked
3530 | lbz TMP2, UPVAL:RB->closed
3532 | stw STR:TMP1, 4(CARG2)
3533 | stw TMP0, 0(CARG2)
3538 |2: // Check if string is white and ensure upvalue is closed.
3539 | andi. TMP3, TMP3, LJ_GC_WHITES // iswhite(str)
3540 | cmplwi cr1, TMP2, 0
3541 | cror 4*cr0+eq, 4*cr0+eq, 4*cr1+eq
3542 | la CARG1, GG_DISP2G(DISPATCH)
3543 | // Crossed a write barrier. Move the barrier forward.
3545 | bl extern lj_gc_barrieruv // (global_State *g, TValue *tv)
3549 | // RA = uvnum*8, RD = num_const*8
3550 | lwz LFUNC:RB, FRAME_FUNC(BASE)
3552 | addi RA, RA, offsetof(GCfuncL, uvptr)
3553 | lfdx f0, KBASE, RD
3554 | lwzx UPVAL:RB, LFUNC:RB, RA
3556 | lwz TMP1, UPVAL:RB->v
3561 | // RA = uvnum*8, RD = primitive_type*8 (~)
3562 | lwz LFUNC:RB, FRAME_FUNC(BASE)
3565 | addi RA, RA, offsetof(GCfuncL, uvptr)
3567 | lwzx UPVAL:RB, LFUNC:RB, RA
3569 | lwz TMP1, UPVAL:RB->v
3575 | // RA = level*8, RD = target
3576 | lwz TMP1, L->openupval
3577 | branch_RD // Do this first since RD is not saved.
3582 | add CARG2, BASE, RA
3583 | bl extern lj_func_closeuv // (lua_State *L, TValue *level)
3590 | // RA = dst*8, RD = proto_const*8 (~) (holding function prototype)
3593 | subfic TMP1, TMP1, -4
3595 | lwzx CARG2, KBASE, TMP1 // KBASE-4-tab_const*4
3597 | lwz CARG3, FRAME_FUNC(BASE)
3598 | // (lua_State *L, GCproto *pt, GCfuncL *parent)
3599 | bl extern lj_func_newL_gc
3600 | // Returns GCfuncL *.
3603 | stwux TMP0, RA, BASE
3604 | stw LFUNC:CRET1, 4(RA)
3608 /* -- Table ops --------------------------------------------------------- */
3612 | // RA = dst*8, RD = (hbits|asize)*8 | tab_const*8 (~)
3613 | lwz TMP0, DISPATCH_GL(gc.total)(DISPATCH)
3615 | lwz TMP1, DISPATCH_GL(gc.threshold)(DISPATCH)
3621 if (op == BC_TNEW) {
3622 | rlwinm CARG2, RD, 29, 21, 31
3623 | rlwinm CARG3, RD, 18, 27, 31
3624 | cmpwi CARG2, 0x7ff; beq >3
3626 | bl extern lj_tab_new // (lua_State *L, int32_t asize, uint32_t hbits)
3627 | // Returns Table *.
3630 | subfic TMP1, TMP1, -4
3631 | lwzx CARG2, KBASE, TMP1 // KBASE-4-tab_const*4
3632 | bl extern lj_tab_dup // (lua_State *L, Table *kt)
3633 | // Returns Table *.
3637 | stwux TMP0, RA, BASE
3638 | stw TAB:CRET1, 4(RA)
3640 if (op == BC_TNEW) {
3647 | bl extern lj_gc_step_fixtop // (lua_State *L)
3654 | // RA = dst*8, RD = str_const*8 (~)
3656 | // RA = src*8, RD = str_const*8 (~)
3657 | lwz LFUNC:TMP2, FRAME_FUNC(BASE)
3659 | lwz TAB:RB, LFUNC:TMP2->env
3660 | subfic TMP1, TMP1, -4
3661 | lwzx STR:RC, KBASE, TMP1 // KBASE-4-str_const*4
3662 if (op == BC_GGET) {
3670 | // RA = dst*8, RB = table*8, RC = key*8
3671 | lwzux CARG1, RB, BASE
3672 | lwzux CARG2, RC, BASE
3680 | checknum cr1, CARG2
3683 | lwz TMP0, TAB:RB->asize
3685 | lwz TMP1, TAB:RB->array
3690 | // Convert number key to integer, check for integerness and range.
3692 | fadd f2, f0, TOBIT
3694 | lwz TMP0, TAB:RB->asize
3695 | fsub f2, f2, TOBIT
3697 | lwz TMP1, TAB:RB->array
3699 | cmplw cr0, TMP0, TMP2
3700 | crand 4*cr0+gt, 4*cr0+gt, 4*cr1+eq
3701 | slwi TMP2, TMP2, 3
3703 | ble ->vmeta_tgetv // Integer key and in array part?
3704 | lwzx TMP0, TMP1, TMP2
3705 | lfdx f14, TMP1, TMP2
3706 | checknil TMP0; beq >2
3709 | stfdx f14, BASE, RA
3712 |2: // Check for __index if table value is nil.
3713 | lwz TAB:TMP2, TAB:RB->metatable
3714 | cmplwi TAB:TMP2, 0
3715 | beq <1 // No metatable: done.
3716 | lbz TMP0, TAB:TMP2->nomm
3717 | andi. TMP0, TMP0, 1<<MM_index
3718 | bne <1 // 'no __index' flag set: done.
3722 | checkstr CARG2; bne ->vmeta_tgetv
3726 | b ->BC_TGETS_Z // String key?
3729 | // RA = dst*8, RB = table*8, RC = str_const*8 (~)
3730 | lwzux CARG1, RB, BASE
3733 | subfic TMP1, TMP1, -4
3735 | lwzx STR:RC, KBASE, TMP1 // KBASE-4-str_const*4
3736 | bne ->vmeta_tgets1
3738 | // TAB:RB = GCtab *, STR:RC = GCstr *, RA = dst*8
3739 | lwz TMP0, TAB:RB->hmask
3740 | lwz TMP1, STR:RC->hash
3741 | lwz NODE:TMP2, TAB:RB->node
3742 | and TMP1, TMP1, TMP0 // idx = str->hash & tab->hmask
3743 | slwi TMP0, TMP1, 5
3744 | slwi TMP1, TMP1, 3
3745 | sub TMP1, TMP0, TMP1
3746 | add NODE:TMP2, NODE:TMP2, TMP1 // node = tab->node + (idx*32-idx*8)
3748 | lwz CARG1, NODE:TMP2->key
3749 | lwz TMP0, 4+offsetof(Node, key)(NODE:TMP2)
3750 | lwz CARG2, NODE:TMP2->val
3751 | lwz TMP1, 4+offsetof(Node, val)(NODE:TMP2)
3752 | checkstr CARG1; bne >4
3753 | cmpw TMP0, STR:RC; bne >4
3754 | checknil CARG2; beq >5 // Key found, but nil value?
3756 | stwux CARG2, RA, BASE
3760 |4: // Follow hash chain.
3761 | lwz NODE:TMP2, NODE:TMP2->next
3762 | cmplwi NODE:TMP2, 0
3764 | // End of hash chain: key not found, nil result.
3767 |5: // Check for __index if table value is nil.
3768 | lwz TAB:TMP2, TAB:RB->metatable
3769 | cmplwi TAB:TMP2, 0
3770 | beq <3 // No metatable: done.
3771 | lbz TMP0, TAB:TMP2->nomm
3772 | andi. TMP0, TMP0, 1<<MM_index
3773 | bne <3 // 'no __index' flag set: done.
3777 | // RA = dst*8, RB = table*8, RC = index*8
3778 | lwzux CARG1, RB, BASE
3781 | checktab CARG1; bne ->vmeta_tgetb
3782 | lwz TMP1, TAB:RB->asize
3783 | lwz TMP2, TAB:RB->array
3784 | cmplw TMP0, TMP1; bge ->vmeta_tgetb
3785 | lwzx TMP1, TMP2, RC
3787 | checknil TMP1; beq >5
3790 | stfdx f0, BASE, RA
3793 |5: // Check for __index if table value is nil.
3794 | lwz TAB:TMP2, TAB:RB->metatable
3795 | cmplwi TAB:TMP2, 0
3796 | beq <1 // No metatable: done.
3797 | lbz TMP2, TAB:TMP2->nomm
3798 | andi. TMP2, TMP2, 1<<MM_index
3799 | bne <1 // 'no __index' flag set: done.
3800 | b ->vmeta_tgetb // Caveat: preserve TMP0!
3804 | // RA = src*8, RB = table*8, RC = key*8
3805 | lwzux CARG1, RB, BASE
3806 | lwzux CARG2, RC, BASE
3814 | checknum cr1, CARG2
3817 | lwz TMP0, TAB:RB->asize
3819 | lwz TMP1, TAB:RB->array
3824 | // Convert number key to integer, check for integerness and range.
3826 | fadd f2, f0, TOBIT
3828 | lwz TMP0, TAB:RB->asize
3829 | fsub f2, f2, TOBIT
3831 | lwz TMP1, TAB:RB->array
3833 | cmplw cr0, TMP0, TMP2
3834 | crand 4*cr0+gt, 4*cr0+gt, 4*cr1+eq
3835 | slwi TMP0, TMP2, 3
3837 | ble ->vmeta_tsetv // Integer key and in array part?
3838 | lwzx TMP2, TMP1, TMP0
3839 | lbz TMP3, TAB:RB->marked
3840 | lfdx f14, BASE, RA
3841 | checknil TMP2; beq >3
3843 | andi. TMP2, TMP3, LJ_GC_BLACK // isblack(table)
3844 | stfdx f14, TMP1, TMP0
3849 |3: // Check for __newindex if previous value is nil.
3850 | lwz TAB:TMP2, TAB:RB->metatable
3851 | cmplwi TAB:TMP2, 0
3852 | beq <1 // No metatable: done.
3853 | lbz TMP2, TAB:TMP2->nomm
3854 | andi. TMP2, TMP2, 1<<MM_newindex
3855 | bne <1 // 'no __newindex' flag set: done.
3859 | checkstr CARG2; bne ->vmeta_tsetv
3863 | b ->BC_TSETS_Z // String key?
3865 |7: // Possible table write barrier for the value. Skip valiswhite check.
3866 | barrierback TAB:RB, TMP3, TMP0
3870 | // RA = src*8, RB = table*8, RC = str_const*8 (~)
3871 | lwzux CARG1, RB, BASE
3874 | subfic TMP1, TMP1, -4
3876 | lwzx STR:RC, KBASE, TMP1 // KBASE-4-str_const*4
3877 | bne ->vmeta_tsets1
3879 | // TAB:RB = GCtab *, STR:RC = GCstr *, RA = src*8
3880 | lwz TMP0, TAB:RB->hmask
3881 | lwz TMP1, STR:RC->hash
3882 | lwz NODE:TMP2, TAB:RB->node
3883 | stb ZERO, TAB:RB->nomm // Clear metamethod cache.
3884 | and TMP1, TMP1, TMP0 // idx = str->hash & tab->hmask
3885 | lfdx f14, BASE, RA
3886 | slwi TMP0, TMP1, 5
3887 | slwi TMP1, TMP1, 3
3888 | sub TMP1, TMP0, TMP1
3889 | lbz TMP3, TAB:RB->marked
3890 | add NODE:TMP2, NODE:TMP2, TMP1 // node = tab->node + (idx*32-idx*8)
3892 | lwz CARG1, NODE:TMP2->key
3893 | lwz TMP0, 4+offsetof(Node, key)(NODE:TMP2)
3894 | lwz CARG2, NODE:TMP2->val
3895 | lwz NODE:TMP1, NODE:TMP2->next
3896 | checkstr CARG1; bne >5
3897 | cmpw TMP0, STR:RC; bne >5
3898 | checknil CARG2; beq >4 // Key found, but nil value?
3900 | andi. TMP0, TMP3, LJ_GC_BLACK // isblack(table)
3901 | stfd f14, NODE:TMP2->val
3906 |4: // Check for __newindex if previous value is nil.
3907 | lwz TAB:TMP1, TAB:RB->metatable
3908 | cmplwi TAB:TMP1, 0
3909 | beq <2 // No metatable: done.
3910 | lbz TMP0, TAB:TMP1->nomm
3911 | andi. TMP0, TMP0, 1<<MM_newindex
3912 | bne <2 // 'no __newindex' flag set: done.
3915 |5: // Follow hash chain.
3916 | cmplwi NODE:TMP1, 0
3917 | mr NODE:TMP2, NODE:TMP1
3919 | // End of hash chain: key not found, add a new one.
3921 | // But check for __newindex first.
3922 | lwz TAB:TMP1, TAB:RB->metatable
3923 | la CARG3, DISPATCH_GL(tmptv)(DISPATCH)
3926 | cmplwi TAB:TMP1, 0
3928 | beq >6 // No metatable: continue.
3929 | lbz TMP0, TAB:TMP1->nomm
3930 | andi. TMP0, TMP0, 1<<MM_newindex
3931 | beq ->vmeta_tsets // 'no __newindex' flag NOT set: check.
3934 | stw STR:RC, 4(CARG3)
3936 | stw TMP0, 0(CARG3)
3937 | bl extern lj_tab_newkey // (lua_State *L, GCtab *t, TValue *k)
3938 | // Returns TValue *.
3940 | stfd f14, 0(CRET1)
3941 | b <3 // No 2nd write barrier needed.
3943 |7: // Possible table write barrier for the value. Skip valiswhite check.
3944 | barrierback TAB:RB, TMP3, TMP0
3948 | // RA = src*8, RB = table*8, RC = index*8
3949 | lwzux CARG1, RB, BASE
3952 | checktab CARG1; bne ->vmeta_tsetb
3953 | lwz TMP1, TAB:RB->asize
3954 | lwz TMP2, TAB:RB->array
3955 | lbz TMP3, TAB:RB->marked
3957 | lfdx f14, BASE, RA
3959 | lwzx TMP1, TMP2, RC
3960 | checknil TMP1; beq >5
3962 | andi. TMP0, TMP3, LJ_GC_BLACK // isblack(table)
3963 | stfdx f14, TMP2, RC
3968 |5: // Check for __newindex if previous value is nil.
3969 | lwz TAB:TMP1, TAB:RB->metatable
3970 | cmplwi TAB:TMP1, 0
3971 | beq <1 // No metatable: done.
3972 | lbz TMP1, TAB:TMP1->nomm
3973 | andi. TMP1, TMP1, 1<<MM_newindex
3974 | bne <1 // 'no __newindex' flag set: done.
3975 | b ->vmeta_tsetb // Caveat: preserve TMP0!
3977 |7: // Possible table write barrier for the value. Skip valiswhite check.
3978 | barrierback TAB:RB, TMP3, TMP0
3983 | // RA = base*8 (table at base-1), RD = num_const*8 (start index)
3986 | add TMP3, KBASE, RD
3987 | lwz TAB:CARG2, -4(RA) // Guaranteed to be a table.
3988 | addic. TMP0, MULTRES, -8
3989 | lwz TMP3, 4(TMP3) // Integer constant is in lo-word.
3990 | srwi CARG3, TMP0, 3
3991 | beq >4 // Nothing to copy?
3992 | add CARG3, CARG3, TMP3
3993 | lwz TMP2, TAB:CARG2->asize
3994 | slwi TMP1, TMP3, 3
3995 | lbz TMP3, TAB:CARG2->marked
3997 | add TMP2, RA, TMP0
3998 | lwz TMP0, TAB:CARG2->array
4000 | add TMP1, TMP1, TMP0
4001 | andi. TMP0, TMP3, LJ_GC_BLACK // isblack(table)
4002 |3: // Copy result slots to table.
4005 | cmpw cr1, RA, TMP2
4007 | addi TMP1, TMP1, 8
4013 |5: // Need to resize array part.
4018 | bl extern lj_tab_reasize // (lua_State *L, GCtab *t, int nasize)
4019 | // Must not reallocate the stack.
4023 |7: // Possible table write barrier for any value. Skip valiswhite check.
4024 | barrierback TAB:CARG2, TMP3, TMP0
4028 /* -- Calls and vararg handling ----------------------------------------- */
4031 | // RA = base*8, (RB = (nresults+1)*8,) RC = extra_nargs*8
4032 | add NARGS8:RC, NARGS8:RC, MULTRES
4033 | // Fall through. Assumes BC_CALL follows.
4036 | // RA = base*8, (RB = (nresults+1)*8,) RC = (nargs+1)*8
4038 | lwzux TMP0, BASE, RA
4039 | lwz LFUNC:RB, 4(BASE)
4040 | subi NARGS8:RC, NARGS8:RC, 8
4041 | addi BASE, BASE, 8
4042 | checkfunc TMP0; bne ->vmeta_call
4047 | // RA = base*8, (RB = 0,) RC = extra_nargs*8
4048 | add NARGS8:RC, NARGS8:RC, MULTRES
4049 | // Fall through. Assumes BC_CALLT follows.
4052 | // RA = base*8, (RB = 0,) RC = (nargs+1)*8
4053 | lwzux TMP0, RA, BASE
4054 | lwz LFUNC:RB, 4(RA)
4055 | subi NARGS8:RC, NARGS8:RC, 8
4056 | lwz TMP1, FRAME_PC(BASE)
4061 | andi. TMP0, TMP1, FRAME_TYPE // Caveat: preserve cr0 until the crand.
4062 | lbz TMP3, LFUNC:RB->ffid
4063 | xori TMP2, TMP1, FRAME_VARG
4064 | cmplwi cr1, NARGS8:RC, 0
4067 | stw LFUNC:RB, FRAME_FUNC(BASE) // Copy function down, but keep PC.
4069 | cmplwi cr7, TMP3, 1 // (> FF_C) Calling a fast function?
4072 | addi TMP3, TMP2, 8
4074 | cmplw cr1, TMP3, NARGS8:RC
4075 | stfdx f0, BASE, TMP2
4079 | crand 4*cr0+eq, 4*cr0+eq, 4*cr7+gt
4084 |5: // Tailcall to a fast function with a Lua frame below.
4086 | decode_RA8 RA, INS
4087 | sub TMP1, BASE, RA
4088 | lwz LFUNC:TMP1, FRAME_FUNC-8(TMP1)
4089 | lwz TMP1, LFUNC:TMP1->pc
4090 | lwz KBASE, PC2PROTO(k)(TMP1) // Need to prepare KBASE.
4093 |7: // Tailcall from a vararg function.
4094 | andi. TMP0, TMP2, FRAME_TYPEP
4095 | bne <1 // Vararg frame below?
4096 | sub BASE, BASE, TMP2 // Relocate BASE down.
4097 | lwz TMP1, FRAME_PC(BASE)
4098 | andi. TMP0, TMP1, FRAME_TYPE
4103 | // RA = base*8, (RB = (nresults+1)*8, RC = (nargs+1)*8 ((2+1)*8))
4105 | add BASE, BASE, RA
4106 | lwz TMP1, -24(BASE)
4107 | lwz LFUNC:RB, -20(BASE)
4110 | stw TMP1, 0(BASE) // Copy callable.
4111 | stw LFUNC:RB, 4(BASE)
4113 | stfd f1, 16(BASE) // Copy control var.
4114 | li NARGS8:RC, 16 // Iterators get 2 arguments.
4115 | stfdu f0, 8(BASE) // Copy state.
4121 | // RA = base*8, (RB = (nresults+1)*8, RC = (nargs+1)*8 (2+1)*8)
4123 | // NYI: add hotloop, record BC_ITERN.
4126 | lwz TAB:RB, -12(RA)
4127 | lwz RC, -4(RA) // Get index from control var.
4128 | lwz TMP0, TAB:RB->asize
4129 | lwz TMP1, TAB:RB->array
4131 |1: // Traverse array part.
4134 | bge >5 // Index points after array part?
4135 | lwzx TMP2, TMP1, TMP3
4136 | lfdx f0, TMP1, TMP3
4147 | addis TMP3, PC, -(BCBIAS_J*4 >> 16)
4149 | decode_RD4 TMP1, INS
4150 | stw RC, -4(RA) // Update control var.
4151 | add PC, TMP1, TMP3
4158 |4: // Skip holes in array part.
4162 |5: // Traverse hash part.
4163 | lwz TMP1, TAB:RB->hmask
4165 | lwz TMP2, TAB:RB->node
4167 | cmplw RC, TMP1 // End of iteration? Branch to ITERL+1.
4171 | sub TMP3, TMP3, RB
4172 | lwzx RB, TMP2, TMP3
4173 | lfdx f0, TMP2, TMP3
4174 | add NODE:TMP3, TMP2, TMP3
4178 | lfd f1, NODE:TMP3->key
4179 | addis TMP2, PC, -(BCBIAS_J*4 >> 16)
4182 | decode_RD4 TMP1, INS
4185 | add PC, TMP1, TMP2
4186 | stw RC, -4(RA) // Update control var.
4189 |7: // Skip holes in hash part.
4195 | // RA = base*8, RD = target (points to ITERN)
4198 | lwz CFUNC:TMP1, -20(RA)
4201 | cmpwi cr0, TMP2, LJ_TTAB
4202 | cmpwi cr1, TMP0, LJ_TFUNC
4203 | cmpwi cr6, TMP3, LJ_TNIL
4205 | lbz TMP1, CFUNC:TMP1->ffid
4206 | crand 4*cr0+eq, 4*cr0+eq, 4*cr6+eq
4207 | cmpwi cr7, TMP1, FF_next_N
4209 | crand 4*cr0+eq, 4*cr0+eq, 4*cr7+eq
4210 | add TMP3, PC, TMP0
4212 | stw ZERO, -4(RA) // Initialize control var.
4213 | addis PC, TMP3, -(BCBIAS_J*4 >> 16)
4216 |5: // Despecialize bytecode if any of the checks fail.
4220 | addis PC, TMP3, -(BCBIAS_J*4 >> 16)
4226 | // RA = base*8, RB = (nresults+1)*8, RC = numparams*8
4227 | lwz TMP0, FRAME_PC(BASE)
4230 | addi RC, RC, FRAME_VARG
4232 | subi TMP3, BASE, 8 // TMP3 = vtop
4233 | sub RC, RC, TMP0 // RC = vbase
4234 | // Note: RC may now be even _above_ BASE if nargs was < numparams.
4236 | sub. TMP1, TMP3, RC
4237 | beq cr1, >5 // Copy all varargs?
4238 | subi TMP2, TMP2, 16
4239 | ble >2 // No vararg slots?
4240 |1: // Copy vararg slots to destination slots.
4245 | cmplw cr1, RC, TMP3
4246 | bge >3 // All destination slots filled?
4248 | blt cr1, <1 // More vararg slots?
4249 |2: // Fill up remainder with nil.
4257 |5: // Copy all varargs.
4258 | lwz TMP0, L->maxstack
4259 | li MULTRES, 8 // MULTRES = (0+1)*8
4260 | bley <3 // No vararg slots?
4261 | add TMP2, RA, TMP1
4263 | addi MULTRES, TMP1, 8
4271 | blt <6 // More vararg slots?
4274 |7: // Grow stack for varargs.
4277 | sub SAVE0, RC, BASE // Need delta, because BASE may change.
4281 | srwi CARG2, TMP1, 3
4282 | bl extern lj_state_growstack // (lua_State *L, int n)
4285 | add RC, BASE, SAVE0
4286 | subi TMP3, BASE, 8
4290 /* -- Returns ----------------------------------------------------------- */
4293 | // RA = results*8, RD = extra_nresults*8
4294 | add RD, RD, MULTRES // MULTRES >= 8, so RD >= 8.
4295 | // Fall through. Assumes BC_RET follows.
4299 | // RA = results*8, RD = (nresults+1)*8
4300 | lwz PC, FRAME_PC(BASE)
4304 | andi. TMP0, PC, FRAME_TYPE
4305 | xori TMP1, PC, FRAME_VARG
4309 | // BASE = base, RA = resultptr, RD = (nresults+1)*8, PC = return
4312 | subi TMP2, BASE, 8
4314 | decode_RB8 RB, INS
4318 | addi TMP3, TMP1, 8
4321 | stfdx f0, TMP2, TMP1
4323 | addi TMP1, TMP3, 8
4326 | stfdx f1, TMP2, TMP3
4331 | decode_RA8 RA, INS
4333 | sub BASE, TMP2, RA
4334 | lwz LFUNC:TMP1, FRAME_FUNC(BASE)
4336 | lwz TMP1, LFUNC:TMP1->pc
4337 | lwz KBASE, PC2PROTO(k)(TMP1)
4340 |6: // Fill up results with nil.
4343 | stwx TISNIL, TMP2, TMP1
4346 |->BC_RETV_Z: // Non-standard return case.
4347 | andi. TMP2, TMP1, FRAME_TYPEP
4349 | // Return from vararg function: relocate BASE down.
4350 | sub BASE, BASE, TMP1
4351 | lwz PC, FRAME_PC(BASE)
4355 case BC_RET0: case BC_RET1:
4356 | // RA = results*8, RD = (nresults+1)*8
4357 | lwz PC, FRAME_PC(BASE)
4360 | andi. TMP0, PC, FRAME_TYPE
4361 | xori TMP1, PC, FRAME_VARG
4365 | subi TMP2, BASE, 8
4366 | decode_RB8 RB, INS
4367 if (op == BC_RET1) {
4373 | decode_RA8 RA, INS
4375 | sub BASE, TMP2, RA
4376 | lwz LFUNC:TMP1, FRAME_FUNC(BASE)
4378 | lwz TMP1, LFUNC:TMP1->pc
4379 | lwz KBASE, PC2PROTO(k)(TMP1)
4382 |6: // Fill up results with nil.
4385 | stwx TISNIL, TMP2, TMP1
4389 /* -- Loops and branches ------------------------------------------------ */
4395 | // Fall through. Assumes BC_IFORL follows.
4405 | // RA = base*8, RD = target (after end of loop or start of loop)
4406 vk = (op == BC_IFORL || op == BC_JFORL);
4409 | lwzux TMP1, RA, BASE
4410 | lwz CARG1, FORL_IDX*8+4(RA)
4411 | cmplw cr0, TMP1, TISNUM
4413 | lwz CARG3, FORL_STEP*8+4(RA)
4415 | addo. CARG1, CARG1, CARG3
4416 | cmpwi cr6, CARG3, 0
4417 | lwz CARG2, FORL_STOP*8+4(RA)
4420 | stw CARG1, FORL_IDX*8+4(RA)
4422 | lwz TMP3, FORL_STEP*8(RA)
4423 | lwz CARG3, FORL_STEP*8+4(RA)
4424 | lwz TMP2, FORL_STOP*8(RA)
4425 | lwz CARG2, FORL_STOP*8+4(RA)
4426 | cmplw cr7, TMP3, TISNUM
4427 | cmplw cr1, TMP2, TISNUM
4428 | crand 4*cr0+eq, 4*cr0+eq, 4*cr7+eq
4429 | crand 4*cr0+eq, 4*cr0+eq, 4*cr1+eq
4430 | cmpwi cr6, CARG3, 0
4436 | stw TISNUM, FORL_EXT*8(RA)
4437 if (op != BC_JFORL) {
4440 | stw CARG1, FORL_EXT*8+4(RA)
4441 if (op != BC_JFORL) {
4444 if (op == BC_FORI) {
4445 | bgt >3 // See FP loop below.
4446 } else if (op == BC_JFORI) {
4447 | addis PC, RD, -(BCBIAS_J*4 >> 16)
4449 } else if (op == BC_IFORL) {
4451 | addis PC, RD, -(BCBIAS_J*4 >> 16)
4457 |5: // Invert check for negative step.
4461 |6: // Potential overflow.
4462 | mcrxr cr0; bley <4 // Ignore unrelated overflow.
4469 | lfd f1, FORL_IDX*8(RA)
4471 | lfdux f1, RA, BASE
4473 | lfd f3, FORL_STEP*8(RA)
4474 | lfd f2, FORL_STOP*8(RA)
4475 | lwz TMP3, FORL_STEP*8(RA)
4477 | stfd f1, FORL_IDX*8(RA)
4482 | lwzux TMP1, RA, BASE
4483 | lwz TMP3, FORL_STEP*8(RA)
4484 | lwz TMP2, FORL_STOP*8(RA)
4485 | cmplw cr0, TMP1, TISNUM
4486 | cmplw cr7, TMP3, TISNUM
4487 | cmplw cr1, TMP2, TISNUM
4489 | lfd f1, FORL_IDX*8(RA)
4490 | crand 4*cr0+lt, 4*cr0+lt, 4*cr7+lt
4491 | crand 4*cr0+lt, 4*cr0+lt, 4*cr1+lt
4492 | lfd f2, FORL_STOP*8(RA)
4495 | cmpwi cr6, TMP3, 0
4496 if (op != BC_JFORL) {
4499 | stfd f1, FORL_EXT*8(RA)
4500 if (op != BC_JFORL) {
4504 if (op == BC_JFORI) {
4505 | addis PC, RD, -(BCBIAS_J*4 >> 16)
4508 if (op == BC_FORI) {
4510 } else if (op == BC_IFORL) {
4517 | addis PC, RD, -(BCBIAS_J*4 >> 16)
4518 } else if (op == BC_JFORI) {
4529 |5: // Negative step.
4530 if (op == BC_FORI) {
4532 |3: // Used by integer loop, too.
4533 | addis PC, RD, -(BCBIAS_J*4 >> 16)
4534 } else if (op == BC_IFORL) {
4536 } else if (op == BC_JFORI) {
4542 if (op == BC_JFORI) {
4545 | decode_RD8 RD, INS
4554 | // Fall through. Assumes BC_IITERL follows.
4562 | // RA = base*8, RD = target
4563 | lwzux TMP1, RA, BASE
4565 | checknil TMP1; beq >1 // Stop if iterator returned nil.
4566 if (op == BC_JITERL) {
4571 | branch_RD // Otherwise save control var + branch.
4580 | // RA = base*8, RD = target (loop extent)
4581 | // Note: RA/RD is only used by trace recorder to determine scope/extent
4582 | // This opcode does NOT jump, it's only purpose is to detect a hot loop.
4586 | // Fall through. Assumes BC_ILOOP follows.
4590 | // RA = base*8, RD = target (loop extent)
4596 | // RA = base*8 (ignored), RD = traceno*8
4597 | lwz TMP1, DISPATCH_J(trace)(DISPATCH)
4599 | // Traces on PPC don't store the trace number, so use 0.
4600 | stw ZERO, DISPATCH_GL(vmstate)(DISPATCH)
4601 | lwzx TRACE:TMP2, TMP1, RD
4602 | mcrxr cr0 // Clear SO flag.
4603 | lwz TMP2, TRACE:TMP2->mcode
4604 | stw BASE, DISPATCH_GL(jit_base)(DISPATCH)
4606 | stw L, DISPATCH_GL(jit_L)(DISPATCH)
4607 | addi JGL, DISPATCH, GG_DISP2G+32768
4613 | // RA = base*8 (only used by trace recorder), RD = target
4618 /* -- Function headers -------------------------------------------------- */
4624 case BC_FUNCV: /* NYI: compiled vararg functions. */
4625 | // Fall through. Assumes BC_IFUNCF/BC_IFUNCV follow.
4633 | // BASE = new base, RA = BASE+framesize*8, RB = LFUNC, RC = nargs*8
4634 | lwz TMP2, L->maxstack
4635 | lbz TMP1, -4+PC2PROTO(numparams)(PC)
4636 | lwz KBASE, -4+PC2PROTO(k)(PC)
4638 | slwi TMP1, TMP1, 3
4639 | bgt ->vm_growstack_l
4640 if (op != BC_JFUNCF) {
4644 | cmplw NARGS8:RC, TMP1 // Check for missing parameters.
4646 if (op == BC_JFUNCF) {
4647 | decode_RD8 RD, INS
4653 |3: // Clear missing parameters.
4654 | stwx TISNIL, BASE, NARGS8:RC
4655 | addi NARGS8:RC, NARGS8:RC, 8
4663 | NYI // NYI: compiled vararg functions
4664 break; /* NYI: compiled vararg functions. */
4667 | // BASE = new base, RA = BASE+framesize*8, RB = LFUNC, RC = nargs*8
4668 | lwz TMP2, L->maxstack
4669 | add TMP1, BASE, RC
4671 | stw LFUNC:RB, 4(TMP1) // Store copy of LFUNC.
4672 | addi TMP3, RC, 8+FRAME_VARG
4673 | lwz KBASE, -4+PC2PROTO(k)(PC)
4675 | stw TMP3, 0(TMP1) // Store delta + FRAME_VARG.
4676 | bge ->vm_growstack_l
4677 | lbz TMP2, -4+PC2PROTO(numparams)(PC)
4682 | addi BASE, TMP1, 8
4685 | cmplw RA, RC // Less args than parameters?
4689 | stw TISNIL, 0(RA) // Clear old fixarg slot (help the GC).
4692 | addic. TMP2, TMP2, -1
4694 | stw TMP3, 12(TMP1)
4695 | addi TMP1, TMP1, 8
4700 |4: // Clear missing parameters.
4707 | // BASE = new base, RA = BASE+framesize*8, RB = CFUNC, RC = nargs*8
4708 if (op == BC_FUNCC) {
4709 | lwz TMP3, CFUNC:RB->f
4711 | lwz TMP3, DISPATCH_GL(wrapf)(DISPATCH)
4713 | add TMP1, RA, NARGS8:RC
4714 | lwz TMP2, L->maxstack
4715 | add RC, BASE, NARGS8:RC
4721 if (op == BC_FUNCCW) {
4722 | lwz CARG2, CFUNC:RB->f
4725 | bgt ->vm_growstack_c // Need to grow stack.
4727 | bctrl // (lua_State *L [, lua_CFunction f])
4728 | // Returns nresults.
4733 | lwz PC, FRAME_PC(BASE) // Fetch PC of caller.
4734 | sub RA, TMP1, RD // RA = L->top - nresults*8
4739 /* ---------------------------------------------------------------------- */
4742 fprintf(stderr, "Error: undefined opcode BC_%s\n", bc_names[op]);
4748 static int build_backend(BuildCtx *ctx)
4752 dasm_growpc(Dst, BC__MAX);
4754 build_subroutines(ctx);
4757 for (op = 0; op < BC__MAX; op++)
4758 build_ins(ctx, (BCOp)op, op);
4763 /* Emit pseudo frame-info for all assembler functions. */
4764 static void emit_asm_debug(BuildCtx *ctx)
4766 int fcofs = (int)((uint8_t *)ctx->glob[GLOB_vm_ffi_call] - ctx->code);
4768 switch (ctx->mode) {
4770 fprintf(ctx->fp, "\t.section .debug_frame,\"\",@progbits\n");
4773 "\t.long .LECIE0-.LSCIE0\n"
4775 "\t.long 0xffffffff\n"
4781 "\t.byte 0xc\n\t.uleb128 1\n\t.uleb128 0\n"
4786 "\t.long .LEFDE0-.LASFDE0\n"
4788 "\t.long .Lframe0\n"
4791 "\t.byte 0xe\n\t.uleb128 %d\n"
4792 "\t.byte 0x11\n\t.uleb128 65\n\t.sleb128 -1\n"
4793 "\t.byte 0x5\n\t.uleb128 70\n\t.uleb128 55\n",
4794 fcofs, CFRAME_SIZE);
4795 for (i = 14; i <= 31; i++)
4797 "\t.byte %d\n\t.uleb128 %d\n"
4798 "\t.byte %d\n\t.uleb128 %d\n",
4799 0x80+i, 37+(31-i), 0x80+32+i, 2+2*(31-i));
4806 "\t.long .LEFDE1-.LASFDE1\n"
4808 "\t.long .Lframe0\n"
4810 "\t.long .lj_vm_ffi_call\n"
4812 "\t.long lj_vm_ffi_call\n"
4815 "\t.byte 0x11\n\t.uleb128 65\n\t.sleb128 -1\n"
4816 "\t.byte 0x8e\n\t.uleb128 2\n"
4817 "\t.byte 0xd\n\t.uleb128 0xe\n"
4819 ".LEFDE1:\n\n", (int)ctx->codesz - fcofs);
4822 fprintf(ctx->fp, "\t.section .eh_frame,\"a\",@progbits\n");
4825 "\t.long .LECIE1-.LSCIE1\n"
4829 "\t.string \"zPR\"\n"
4833 "\t.uleb128 6\n" /* augmentation length */
4834 "\t.byte 0x1b\n" /* pcrel|sdata4 */
4835 "\t.long lj_err_unwind_dwarf-.\n"
4836 "\t.byte 0x1b\n" /* pcrel|sdata4 */
4837 "\t.byte 0xc\n\t.uleb128 1\n\t.uleb128 0\n"
4842 "\t.long .LEFDE2-.LASFDE2\n"
4844 "\t.long .LASFDE2-.Lframe1\n"
4845 "\t.long .Lbegin-.\n"
4847 "\t.uleb128 0\n" /* augmentation length */
4848 "\t.byte 0xe\n\t.uleb128 %d\n"
4849 "\t.byte 0x11\n\t.uleb128 65\n\t.sleb128 -1\n"
4850 "\t.byte 0x5\n\t.uleb128 70\n\t.uleb128 55\n",
4851 fcofs, CFRAME_SIZE);
4852 for (i = 14; i <= 31; i++)
4854 "\t.byte %d\n\t.uleb128 %d\n"
4855 "\t.byte %d\n\t.uleb128 %d\n",
4856 0x80+i, 37+(31-i), 0x80+32+i, 2+2*(31-i));
4863 "\t.long .LECIE2-.LSCIE2\n"
4867 "\t.string \"zR\"\n"
4871 "\t.uleb128 1\n" /* augmentation length */
4872 "\t.byte 0x1b\n" /* pcrel|sdata4 */
4873 "\t.byte 0xc\n\t.uleb128 1\n\t.uleb128 0\n"
4878 "\t.long .LEFDE3-.LASFDE3\n"
4880 "\t.long .LASFDE3-.Lframe2\n"
4881 "\t.long lj_vm_ffi_call-.\n"
4883 "\t.uleb128 0\n" /* augmentation length */
4884 "\t.byte 0x11\n\t.uleb128 65\n\t.sleb128 -1\n"
4885 "\t.byte 0x8e\n\t.uleb128 2\n"
4886 "\t.byte 0xd\n\t.uleb128 0xe\n"
4888 ".LEFDE3:\n\n", (int)ctx->codesz - fcofs);