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
2193 | sub TMP2, BASE, TMP1
2194 | b ->vm_call_dispatch // Resolve again for tailcall.
2196 |5: // Grow stack for fallback handler.
2197 | li CARG2, LUA_MINSTACK
2198 | bl extern lj_state_growstack // (lua_State *L, int n)
2200 | cmpw TMP0, TMP0 // Set 4*cr0+eq to force retry.
2203 |->fff_gcstep: // Call GC step function.
2204 | // BASE = new base, RC = nargs*8
2207 | add TMP0, BASE, NARGS8:RC
2208 | stw PC, SAVE_PC // Redundant (but a defined value).
2211 | bl extern lj_gc_step // (lua_State *L)
2215 | sub NARGS8:RC, TMP0, BASE
2216 | lwz CFUNC:RB, FRAME_FUNC(BASE)
2219 |//-----------------------------------------------------------------------
2220 |//-- Special dispatch targets -------------------------------------------
2221 |//-----------------------------------------------------------------------
2223 |->vm_record: // Dispatch target for recording phase.
2225 | lbz TMP3, DISPATCH_GL(hookmask)(DISPATCH)
2226 | andi. TMP0, TMP3, HOOK_VMEVENT // No recording while in vmevent.
2228 | // Decrement the hookcount for consistency, but always do the call.
2229 | lwz TMP2, DISPATCH_GL(hookcount)(DISPATCH)
2230 | andi. TMP0, TMP3, HOOK_ACTIVE
2232 | subi TMP2, TMP2, 1
2233 | andi. TMP0, TMP3, LUA_MASKLINE|LUA_MASKCOUNT
2235 | stw TMP2, DISPATCH_GL(hookcount)(DISPATCH)
2239 |->vm_rethook: // Dispatch target for return hooks.
2240 | lbz TMP3, DISPATCH_GL(hookmask)(DISPATCH)
2241 | andi. TMP0, TMP3, HOOK_ACTIVE // Hook already active?
2243 |5: // Re-dispatch to static ins.
2244 | addi TMP1, TMP1, GG_DISP2STATIC // Assumes decode_OP4 TMP1, INS.
2245 | lwzx TMP0, DISPATCH, TMP1
2249 |->vm_inshook: // Dispatch target for instr/line hooks.
2250 | lbz TMP3, DISPATCH_GL(hookmask)(DISPATCH)
2251 | lwz TMP2, DISPATCH_GL(hookcount)(DISPATCH)
2252 | andi. TMP0, TMP3, HOOK_ACTIVE // Hook already active?
2253 | rlwinm TMP0, TMP3, 31-LUA_HOOKLINE, 31, 0
2256 | cmpwi cr1, TMP0, 0
2257 | addic. TMP2, TMP2, -1
2259 | stw TMP2, DISPATCH_GL(hookcount)(DISPATCH)
2264 | stw MULTRES, SAVE_MULTRES
2267 | // SAVE_PC must hold the _previous_ PC. The callee updates it with PC.
2268 | bl extern lj_dispatch_ins // (lua_State *L, const BCIns *pc)
2271 |4: // Re-dispatch to static ins.
2273 | decode_OP4 TMP1, INS
2274 | decode_RB8 RB, INS
2275 | addi TMP1, TMP1, GG_DISP2STATIC
2276 | decode_RD8 RD, INS
2277 | lwzx TMP0, DISPATCH, TMP1
2278 | decode_RA8 RA, INS
2279 | decode_RC8 RC, INS
2283 |->cont_hook: // Continue from hook yield.
2285 | lwz MULTRES, -20(RB) // Restore MULTRES for *M ins.
2288 |->vm_hotloop: // Hot loop counter underflow.
2290 | lwz LFUNC:TMP1, FRAME_FUNC(BASE)
2291 | addi CARG1, DISPATCH, GG_DISP2J
2293 | lwz TMP1, LFUNC:TMP1->pc
2295 | stw L, DISPATCH_J(L)(DISPATCH)
2296 | lbz TMP1, PC2PROTO(framesize)(TMP1)
2298 | slwi TMP1, TMP1, 3
2299 | add TMP1, BASE, TMP1
2301 | bl extern lj_trace_hot // (jit_State *J, const BCIns *pc)
2305 |->vm_callhook: // Dispatch target for call hooks.
2311 |->vm_hotcall: // Hot call counter underflow.
2316 | add TMP0, BASE, RC
2322 | bl extern lj_dispatch_call // (lua_State *L, const BCIns *pc)
2323 | // Returns ASMFunction.
2326 | stw ZERO, SAVE_PC // Invalidate for subsequent line hook.
2327 | sub NARGS8:RC, TMP0, BASE
2329 | lwz LFUNC:RB, FRAME_FUNC(BASE)
2334 |//-----------------------------------------------------------------------
2335 |//-- Trace exit handler -------------------------------------------------
2336 |//-----------------------------------------------------------------------
2338 |.macro savex_, a, b, c, d
2339 | stfd f..a, 16+a*8(sp)
2340 | stfd f..b, 16+b*8(sp)
2341 | stfd f..c, 16+c*8(sp)
2342 | stfd f..d, 16+d*8(sp)
2347 | addi sp, sp, -(16+32*8+32*4)
2348 | stmw r2, 16+32*8+2*4(sp)
2349 | addi DISPATCH, JGL, -GG_DISP2G-32768
2350 | li CARG2, ~LJ_VMST_EXIT
2351 | lwz CARG1, 16+32*8+32*4(sp) // Get stack chain.
2352 | stw CARG2, DISPATCH_GL(vmstate)(DISPATCH)
2354 | stw CARG1, 0(sp) // Store extended stack chain.
2355 | mcrxr cr0 // Clear SO flag.
2357 | addi CARG2, sp, 16+32*8+32*4 // Recompute original value of sp.
2359 | stw CARG2, 16+32*8+1*4(sp) // Store sp in RID_SP.
2360 | savex_ 12,13,14,15
2363 | savex_ 16,17,18,19
2364 | stw TMP1, 16+32*8+0*4(sp) // Clear RID_TMP.
2365 | savex_ 20,21,22,23
2366 | lhz CARG4, 2(CARG3) // Load trace number.
2367 | savex_ 24,25,26,27
2368 | lwz L, DISPATCH_GL(jit_L)(DISPATCH)
2369 | savex_ 28,29,30,31
2370 | sub CARG3, TMP0, CARG3 // Compute exit number.
2371 | lwz BASE, DISPATCH_GL(jit_base)(DISPATCH)
2372 | srwi CARG3, CARG3, 2
2373 | stw L, DISPATCH_J(L)(DISPATCH)
2374 | subi CARG3, CARG3, 2
2375 | stw TMP1, DISPATCH_GL(jit_L)(DISPATCH)
2376 | stw CARG4, DISPATCH_J(parent)(DISPATCH)
2378 | addi CARG1, DISPATCH, GG_DISP2J
2379 | stw CARG3, DISPATCH_J(exitno)(DISPATCH)
2380 | addi CARG2, sp, 16
2381 | bl extern lj_trace_exit // (jit_State *J, ExitState *ex)
2382 | // Returns MULTRES (unscaled) or negated error code.
2383 | lwz TMP1, L->cframe
2386 | rlwinm sp, TMP1, 0, 0, 29
2387 | lwz PC, SAVE_PC // Get SAVE_PC.
2389 | stw L, SAVE_L // Set SAVE_L (on-trace resume/yield).
2394 | // CARG1 = MULTRES or negated error code, BASE, PC and JGL set.
2396 | addi DISPATCH, JGL, -GG_DISP2G-32768
2399 | blt >3 // Check for error from exit.
2400 | lwz LFUNC:TMP1, FRAME_FUNC(BASE)
2401 | slwi MULTRES, CARG1, 3
2403 | stw MULTRES, SAVE_MULTRES
2404 | lwz TMP1, LFUNC:TMP1->pc
2405 | stw TMP2, DISPATCH_GL(jit_L)(DISPATCH)
2406 | lwz KBASE, PC2PROTO(k)(TMP1)
2407 | // Setup type comparison constants.
2408 | li TISNUM, LJ_TISNUM
2409 | lus TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float).
2412 | ori TMP3, TMP3, 0x0004 // TONUM = 2^52 + 2^51 + 2^31 (float).
2415 | lus TMP0, 0x4338 // Hiword of 2^52 + 2^51 (double)
2416 | li TISNIL, LJ_TNIL
2417 | stw TMP0, TONUM_HI
2419 | // Modified copy of ins_next which handles function header dispatch, too.
2422 | // Assumes TISNIL == ~LJ_VMST_INTERP == -1.
2423 | stw TISNIL, DISPATCH_GL(vmstate)(DISPATCH)
2424 | decode_OP4 TMP1, INS
2425 | decode_RA8 RA, INS
2426 | lwzx TMP0, DISPATCH, TMP1
2428 | cmplwi TMP1, BC_FUNCF*4 // Function header?
2430 | decode_RB8 RB, INS
2431 | decode_RD8 RD, INS
2432 | decode_RC8 RC, INS
2435 | subi RC, MULTRES, 8
2439 |3: // Rethrow error from the right C frame.
2442 | bl extern lj_err_throw // (lua_State *L, int errcode)
2445 |//-----------------------------------------------------------------------
2446 |//-- Math helper functions ----------------------------------------------
2447 |//-----------------------------------------------------------------------
2449 | // NYI: Use internal implementation.
2460 | divwo. TMP0, CARG1, CARG2
2462 | xor. CARG3, CARG1, CARG2
2463 | mullw TMP0, TMP0, CARG2
2464 | sub CARG1, CARG1, TMP0
2466 | cmpwi CARG1, 0; beqlr
2467 | add CARG1, CARG1, CARG2
2473 | mcrxr cr0 // Clear SO for -2147483648 % -1 and return 0.
2476 |// Callable from C: double lj_vm_foldarith(double x, double y, int op)
2477 |// Compute x op y for basic arithmetic operators (+ - * / % ^ and unary -)
2478 |// and basic math functions. ORDER ARITH
2482 | fadd FARG1, FARG1, FARG2; blr
2484 | fsub FARG1, FARG1, FARG2; blr
2486 | cmplwi CARG1, 3; beq >1; bgt >2
2487 | fmul FARG1, FARG1, FARG2; blr
2489 | fdiv FARG1, FARG1, FARG2; blr
2491 | cmplwi CARG1, 5; beq >1; bgt >2
2492 | // NYI: Use internal implementation of floor and avoid spills.
2493 | stwu sp, -32(sp); stfd f14, 16(sp); stfd f15, 24(sp)
2496 | fdiv FARG1, FARG1, FARG2
2501 | fmul FARG1, FARG1, f15
2503 | fsub FARG1, f14, FARG1
2504 | lfd f14, 16(sp); lfd f15, 24(sp); addi sp, sp, 32; blr
2508 | cmplwi CARG1, 7; beq >1; bgt >2
2509 | fneg FARG1, FARG1; blr
2511 | fabs FARG1, FARG1; blr
2514 | cmplwi CARG1, 9; beq >9; bgt >2
2516 | // No support needed for IR_LDEXP.
2518 | cmplwi CARG1, 11; bgt >9
2519 | fsub f0, FARG1, FARG2
2521 | fsel FARG1, f0, FARG2, FARG1 // IR_MAX
2524 | fsel FARG1, f0, FARG1, FARG2 // IR_MIN
2529 | NYI // Other operations only needed by JIT compiler.
2532 |//-----------------------------------------------------------------------
2533 |//-- Miscellaneous functions --------------------------------------------
2534 |//-----------------------------------------------------------------------
2536 |// void lj_vm_cachesync(void *start, void *end)
2537 |// Flush D-Cache and invalidate I-Cache. Assumes 32 byte cache line size.
2538 |// This is a good lower bound, except for very ancient PPC models.
2540 | // Compute start of first cache line and number of cache lines.
2541 | rlwinm CARG1, CARG1, 0, 0, 26
2542 | sub CARG2, CARG2, CARG1
2543 | addi CARG2, CARG2, 31
2544 | rlwinm. CARG2, CARG2, 27, 5, 31
2548 |1: // Flush D-Cache.
2550 | addi CARG1, CARG1, 32
2554 |1: // Invalidate I-Cache.
2556 | addi CARG3, CARG3, 32
2561 |//-----------------------------------------------------------------------
2562 |//-- FFI helper functions -----------------------------------------------
2563 |//-----------------------------------------------------------------------
2565 |// Handler for callback functions. Callback slot number in r11, g in r12.
2568 |.type CTSTATE, CTState, PC
2570 | lwz CTSTATE, GL:r12->ctype_state
2571 | addi DISPATCH, r12, GG_G2DISP
2572 | stw r11, CTSTATE->cb.slot
2573 | stw r3, CTSTATE->cb.gpr[0]
2574 | stfd f1, CTSTATE->cb.fpr[0]
2575 | stw r4, CTSTATE->cb.gpr[1]
2576 | stfd f2, CTSTATE->cb.fpr[1]
2577 | stw r5, CTSTATE->cb.gpr[2]
2578 | stfd f3, CTSTATE->cb.fpr[2]
2579 | stw r6, CTSTATE->cb.gpr[3]
2580 | stfd f4, CTSTATE->cb.fpr[3]
2581 | stw r7, CTSTATE->cb.gpr[4]
2582 | stfd f5, CTSTATE->cb.fpr[4]
2583 | stw r8, CTSTATE->cb.gpr[5]
2584 | stfd f6, CTSTATE->cb.fpr[5]
2585 | stw r9, CTSTATE->cb.gpr[6]
2586 | stfd f7, CTSTATE->cb.fpr[6]
2587 | stw r10, CTSTATE->cb.gpr[7]
2588 | stfd f8, CTSTATE->cb.fpr[7]
2589 | addi TMP0, sp, CFRAME_SPACE+8
2590 | stw TMP0, CTSTATE->cb.stack
2592 | stw CTSTATE, SAVE_PC // Any value outside of bytecode is ok.
2594 | bl extern lj_ccallback_enter // (CTState *cts, void *cf)
2595 | // Returns lua_State *.
2596 | lwz BASE, L:CRET1->base
2597 | li TISNUM, LJ_TISNUM // Setup type comparison constants.
2598 | lwz RC, L:CRET1->top
2599 | lus TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float).
2603 | lwz LFUNC:RB, FRAME_FUNC(BASE)
2604 | ori TMP3, TMP3, 0x0004 // TONUM = 2^52 + 2^51 + 2^31 (float).
2605 | li TISNIL, LJ_TNIL
2615 |->cont_ffi_callback: // Return from FFI callback.
2617 | lwz CTSTATE, DISPATCH_GL(ctype_state)(DISPATCH)
2623 | bl extern lj_ccallback_leave // (CTState *cts, TValue *o)
2624 | lwz CRET1, CTSTATE->cb.gpr[0]
2625 | lfd FARG1, CTSTATE->cb.fpr[0]
2626 | lwz CRET2, CTSTATE->cb.gpr[1]
2630 |->vm_ffi_call: // Call C function via FFI.
2631 | // Caveat: needs special frame unwinding, see below.
2633 | .type CCSTATE, CCallState, CARG1
2634 | lwz TMP1, CCSTATE->spadj
2636 | lbz CARG2, CCSTATE->nsp
2637 | lbz CARG3, CCSTATE->nfpr
2640 | cmpwi cr1, CARG3, 0
2642 | addic. CARG2, CARG2, -1
2643 | stwux sp, sp, TMP1
2644 | crnot 4*cr1+eq, 4*cr1+eq // For vararg calls.
2646 | stw CCSTATE, -8(TMP2)
2648 | la TMP1, CCSTATE->stack
2649 | slwi CARG2, CARG2, 2
2653 | lwzx TMP0, TMP1, CARG2
2654 | stwx TMP0, TMP2, CARG2
2655 | addic. CARG2, CARG2, -4
2659 | lfd f1, CCSTATE->fpr[0]
2660 | lfd f2, CCSTATE->fpr[1]
2661 | lfd f3, CCSTATE->fpr[2]
2662 | lfd f4, CCSTATE->fpr[3]
2663 | lfd f5, CCSTATE->fpr[4]
2664 | lfd f6, CCSTATE->fpr[5]
2665 | lfd f7, CCSTATE->fpr[6]
2666 | lfd f8, CCSTATE->fpr[7]
2668 | lwz TMP0, CCSTATE->func
2669 | lwz CARG2, CCSTATE->gpr[1]
2670 | lwz CARG3, CCSTATE->gpr[2]
2671 | lwz CARG4, CCSTATE->gpr[3]
2672 | lwz CARG5, CCSTATE->gpr[4]
2674 | lwz r8, CCSTATE->gpr[5]
2675 | lwz r9, CCSTATE->gpr[6]
2676 | lwz r10, CCSTATE->gpr[7]
2677 | lwz CARG1, CCSTATE->gpr[0] // Do this last, since CCSTATE is CARG1.
2679 | lwz CCSTATE:TMP1, -8(r14)
2682 | stw CARG1, CCSTATE:TMP1->gpr[0]
2683 | stfd FARG1, CCSTATE:TMP1->fpr[0]
2684 | stw CARG2, CCSTATE:TMP1->gpr[1]
2686 | stw CARG3, CCSTATE:TMP1->gpr[2]
2688 | stw CARG4, CCSTATE:TMP1->gpr[3]
2692 |// Note: vm_ffi_call must be the last function in this object file!
2694 |//-----------------------------------------------------------------------
2697 /* Generate the code for a single instruction. */
2698 static void build_ins(BuildCtx *ctx, BCOp op, int defop)
2705 /* -- Comparison ops ---------------------------------------------------- */
2707 /* Remember: all ops branch for a true comparison, fall through otherwise. */
2709 case BC_ISLT: case BC_ISGE: case BC_ISLE: case BC_ISGT:
2710 | // RA = src1*8, RD = src2*8, JMP with RD = target
2712 | lwzux TMP0, RA, BASE
2715 | lwzux TMP1, RD, BASE
2717 | checknum cr0, TMP0
2719 | decode_RD4 TMP2, TMP2
2720 | checknum cr1, TMP1
2721 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
2725 if (op == BC_ISLT) {
2727 } else if (op == BC_ISGE) {
2729 } else if (op == BC_ISLE) {
2739 |7: // RA is not an integer.
2740 | bgt cr0, ->vmeta_comp
2741 | // RA is a number.
2743 | bgt cr1, ->vmeta_comp
2745 | // RA is a number, RD is an integer.
2749 |8: // RA is an integer, RD is not an integer.
2750 | bgt cr1, ->vmeta_comp
2751 | // RA is an integer, RD is a number.
2757 if (op == BC_ISLT) {
2759 } else if (op == BC_ISGE) {
2761 } else if (op == BC_ISLE) {
2762 | cror 4*cr0+lt, 4*cr0+lt, 4*cr0+eq
2765 | cror 4*cr0+lt, 4*cr0+lt, 4*cr0+eq
2770 | lwzx TMP0, BASE, RA
2773 | lwzx TMP1, BASE, RD
2774 | checknum cr0, TMP0
2777 | checknum cr1, TMP1
2778 | decode_RD4 TMP2, TMP2
2779 | bge cr0, ->vmeta_comp
2780 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
2781 | bge cr1, ->vmeta_comp
2783 if (op == BC_ISLT) {
2785 } else if (op == BC_ISGE) {
2787 } else if (op == BC_ISLE) {
2788 | cror 4*cr0+lt, 4*cr0+lt, 4*cr0+eq
2791 | cror 4*cr0+lt, 4*cr0+lt, 4*cr0+eq
2800 case BC_ISEQV: case BC_ISNEV:
2801 vk = op == BC_ISEQV;
2802 | // RA = src1*8, RD = src2*8, JMP with RD = target
2804 | lwzux TMP0, RA, BASE
2807 | lwzux TMP1, RD, BASE
2808 | checknum cr0, TMP0
2810 | checknum cr1, TMP1
2811 | decode_RD4 TMP2, TMP2
2813 | cror 4*cr7+gt, 4*cr0+gt, 4*cr1+gt
2814 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
2816 | ble cr7, ->BC_ISEQN_Z
2818 | ble cr7, ->BC_ISNEN_Z
2821 | lwzux TMP0, RA, BASE
2825 | lwzux TMP1, RD, BASE
2826 | checknum cr0, TMP0
2827 | decode_RD4 TMP2, TMP2
2829 | checknum cr1, TMP1
2830 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
2844 |5: // Either or both types are not numbers.
2850 | cmpwi cr7, TMP0, LJ_TCDATA
2851 | cmpwi cr5, TMP1, LJ_TCDATA
2855 | cmplwi cr1, TMP3, ~LJ_TISPRI // Primitive?
2857 | cror 4*cr7+eq, 4*cr7+eq, 4*cr5+eq
2859 | cmplwi cr6, TMP3, ~LJ_TISTABUD // Table or userdata?
2861 | beq cr7, ->vmeta_equal_cd
2863 | cmplw cr5, CARG2, CARG3
2864 | crandc 4*cr0+gt, 4*cr0+eq, 4*cr1+gt // 2: Same type and primitive.
2865 | crorc 4*cr0+lt, 4*cr5+eq, 4*cr0+eq // 1: Same tv or different type.
2866 | crand 4*cr0+eq, 4*cr0+eq, 4*cr5+eq // 0: Same type and same tv.
2868 | cror 4*cr0+eq, 4*cr0+eq, 4*cr0+gt // 0 or 2.
2869 | cror 4*cr0+lt, 4*cr0+lt, 4*cr0+gt // 1 or 2.
2880 | bge cr0, >2 // Done if 1 or 2.
2885 | blt cr0, <1 // Done if 1 or 2.
2887 | blt cr6, <1 // Done if not tab/ud.
2889 | // Different tables or userdatas. Need to check __eq metamethod.
2890 | // Field metatable must be at same offset for GCtab and GCudata!
2891 | lwz TAB:TMP2, TAB:CARG2->metatable
2892 | li CARG4, 1-vk // ne = 0 or 1.
2893 | cmplwi TAB:TMP2, 0
2894 | beq <1 // No metatable?
2895 | lbz TMP2, TAB:TMP2->nomm
2896 | andi. TMP2, TMP2, 1<<MM_eq
2897 | bne <1 // Or 'no __eq' flag set?
2898 | mr PC, SAVE0 // Restore old PC.
2899 | b ->vmeta_equal // Handle __eq metamethod.
2902 case BC_ISEQS: case BC_ISNES:
2903 vk = op == BC_ISEQS;
2904 | // RA = src*8, RD = str_const*8 (~), JMP with RD = target
2905 | lwzux TMP0, RA, BASE
2907 | lwz STR:TMP3, 4(RA)
2912 | cmpwi TMP0, LJ_TCDATA
2914 | lwzx STR:TMP1, KBASE, RD // KBASE-4-str_const*4
2915 | subfic TMP0, TMP0, LJ_TSTR
2917 | beq ->vmeta_equal_cd
2919 | sub TMP1, STR:TMP1, STR:TMP3
2920 | or TMP0, TMP0, TMP1
2921 | decode_RD4 TMP2, TMP2
2922 | subfic TMP0, TMP0, 0
2923 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
2924 | subfe TMP1, TMP1, TMP1
2926 | andc TMP2, TMP2, TMP1
2928 | and TMP2, TMP2, TMP1
2934 case BC_ISEQN: case BC_ISNEN:
2935 vk = op == BC_ISEQN;
2936 | // RA = src*8, RD = num_const*8, JMP with RD = target
2938 | lwzux TMP0, RA, BASE
2941 | lwzux TMP1, RD, KBASE
2942 | checknum cr0, TMP0
2944 | checknum cr1, TMP1
2945 | decode_RD4 TMP2, TMP2
2947 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
2959 |->BC_ISEQN_Z: // Dummy label.
2961 |->BC_ISNEN_Z: // Dummy label.
2963 | lwzx TMP0, BASE, RA
2967 | lfdx f1, KBASE, RD
2968 | decode_RD4 TMP2, TMP2
2970 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
2993 | cmpwi TMP0, LJ_TCDATA
2994 | beq ->vmeta_equal_cd
2998 |7: // RA is not an integer.
3000 | // RA is a number.
3003 | // RA is a number, RD is an integer.
3007 |8: // RA is an integer, RD is a number.
3017 case BC_ISEQP: case BC_ISNEP:
3018 vk = op == BC_ISEQP;
3019 | // RA = src*8, RD = primitive_type*8 (~), JMP with RD = target
3020 | lwzx TMP0, BASE, RA
3026 | cmpwi TMP0, LJ_TCDATA
3028 | sub TMP0, TMP0, TMP1
3030 | beq ->vmeta_equal_cd
3032 | decode_RD4 TMP2, TMP2
3033 | addic TMP0, TMP0, -1
3034 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
3035 | subfe TMP1, TMP1, TMP1
3037 | and TMP2, TMP2, TMP1
3039 | andc TMP2, TMP2, TMP1
3045 /* -- Unary test and copy ops ------------------------------------------- */
3047 case BC_ISTC: case BC_ISFC: case BC_IST: case BC_ISF:
3048 | // RA = dst*8 or unused, RD = src*8, JMP with RD = target
3049 | lwzx TMP0, BASE, RD
3052 if (op == BC_IST || op == BC_ISF) {
3053 | subfic TMP0, TMP0, LJ_TTRUE
3054 | decode_RD4 TMP2, INS
3055 | subfe TMP1, TMP1, TMP1
3056 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
3058 | andc TMP2, TMP2, TMP1
3060 | and TMP2, TMP2, TMP1
3064 | li TMP1, LJ_TFALSE
3067 if (op == BC_ISTC) {
3072 | addis PC, PC, -(BCBIAS_J*4 >> 16)
3073 | decode_RD4 TMP2, INS
3074 | stfdx f0, BASE, RA
3081 /* -- Unary ops --------------------------------------------------------- */
3084 | // RA = dst*8, RD = src*8
3087 | stfdx f0, BASE, RA
3091 | // RA = dst*8, RD = src*8
3093 | lwzx TMP0, BASE, RD
3094 | subfic TMP1, TMP0, LJ_TTRUE
3095 | adde TMP0, TMP0, TMP1
3096 | stwx TMP0, BASE, RA
3100 | // RA = dst*8, RD = src*8
3101 | lwzux TMP1, RD, BASE
3110 | stwux TISNUM, RA, BASE
3114 |4: // Potential overflow.
3115 | mcrxr cr0; bley <1 // Ignore unrelated overflow.
3116 | lus TMP1, 0x41e0 // 2^31.
3122 | xoris TMP1, TMP1, 0x8000
3125 | stwux TMP1, RA, BASE
3134 | // RA = dst*8, RD = src*8
3135 | lwzux TMP0, RD, BASE
3137 | checkstr TMP0; bne >2
3138 | lwz CRET1, STR:CARG1->len
3142 | stwux TISNUM, RA, BASE
3145 | tonum_u f0, CRET1 // Result is a non-negative integer.
3147 | stfdx f0, BASE, RA
3151 | checktab TMP0; bne ->vmeta_len
3152 #ifdef LUAJIT_ENABLE_LUA52COMPAT
3153 | lwz TAB:TMP2, TAB:CARG1->metatable
3154 | cmplwi TAB:TMP2, 0
3159 | bl extern lj_tab_len // (GCtab *t)
3160 | // Returns uint32_t (but less than 2^31).
3162 #ifdef LUAJIT_ENABLE_LUA52COMPAT
3164 | lbz TMP0, TAB:TMP2->nomm
3165 | andi. TMP0, TMP0, 1<<MM_len
3166 | bne <3 // 'no __len' flag set: done.
3171 /* -- Binary ops -------------------------------------------------------- */
3173 |.macro ins_arithpre
3174 | // RA = dst*8, RB = src1*8, RC = src2*8 | num_const*8
3175 ||vk = ((int)op - BC_ADDVN) / (BC_ADDNV-BC_ADDVN);
3178 | lwzx TMP1, BASE, RB
3180 | lwzx TMP2, KBASE, RC
3182 | lfdx f14, BASE, RB
3183 | lfdx f15, KBASE, RC
3185 | checknum cr0, TMP1
3186 | checknum cr1, TMP2
3187 | crand 4*cr0+lt, 4*cr0+lt, 4*cr1+lt
3188 | bge ->vmeta_arith_vn
3190 | checknum TMP1; bge ->vmeta_arith_vn
3194 | lwzx TMP1, BASE, RB
3196 | lwzx TMP2, KBASE, RC
3198 | lfdx f15, BASE, RB
3199 | lfdx f14, KBASE, RC
3201 | checknum cr0, TMP1
3202 | checknum cr1, TMP2
3203 | crand 4*cr0+lt, 4*cr0+lt, 4*cr1+lt
3204 | bge ->vmeta_arith_nv
3206 | checknum TMP1; bge ->vmeta_arith_nv
3210 | lwzx TMP1, BASE, RB
3211 | lwzx TMP2, BASE, RC
3212 | lfdx f14, BASE, RB
3213 | lfdx f15, BASE, RC
3214 | checknum cr0, TMP1
3215 | checknum cr1, TMP2
3216 | crand 4*cr0+lt, 4*cr0+lt, 4*cr1+lt
3217 | bge ->vmeta_arith_vv
3222 |.macro ins_arithfallback, ins
3225 | ins ->vmeta_arith_vn2
3228 | ins ->vmeta_arith_nv2
3231 | ins ->vmeta_arith_vv2
3236 |.macro intmod, a, b, c
3240 |.macro fpmod, a, b, c
3243 | // NYI: Use internal implementation of floor.
3244 | bl extern floor // floor(b/c)
3246 | fsub a, b, a // b - floor(b/c)*c
3249 |.macro ins_arithfp, fpins
3251 |.if "fpins" == "fpmod_"
3252 | b ->BC_MODVN_Z // Avoid 3 copies. It's slow anyway.
3254 | fpins f0, f14, f15
3256 | stfdx f0, BASE, RA
3261 |.macro ins_arithdn, intins, fpins
3262 | // RA = dst*8, RB = src1*8, RC = src2*8 | num_const*8
3263 ||vk = ((int)op - BC_ADDVN) / (BC_ADDNV-BC_ADDVN);
3266 | lwzux TMP1, RB, BASE
3267 | lwzux TMP2, RC, KBASE
3269 | checknum cr0, TMP1
3273 | lwzux TMP1, RB, BASE
3274 | lwzux TMP2, RC, KBASE
3276 | checknum cr0, TMP1
3280 | lwzux TMP1, RB, BASE
3281 | lwzux TMP2, RC, BASE
3283 | checknum cr0, TMP1
3287 | checknum cr1, TMP2
3290 | intins CARG1, CARG1, CARG2
3294 | stwux TISNUM, RA, BASE
3299 | mcrxr cr0; bley <1 // Ignore unrelated overflow.
3300 | ins_arithfallback b
3304 | crand 4*cr0+lt, 4*cr0+lt, 4*cr1+lt
3308 | crand 4*cr0+lt, 4*cr0+lt, 4*cr1+lt
3311 | ins_arithfallback bge
3312 |.if "fpins" == "fpmod_"
3313 | b ->BC_MODVN_Z // Avoid 3 copies. It's slow anyway.
3315 | fpins f0, f14, f15
3317 | stfdx f0, BASE, RA
3322 |.macro ins_arith, intins, fpins
3324 | ins_arithdn intins, fpins
3330 case BC_ADDVN: case BC_ADDNV: case BC_ADDVV:
3331 | ins_arith addo., fadd
3333 case BC_SUBVN: case BC_SUBNV: case BC_SUBVV:
3334 | ins_arith subo., fsub
3336 case BC_MULVN: case BC_MULNV: case BC_MULVV:
3337 | ins_arith mullwo., fmul
3339 case BC_DIVVN: case BC_DIVNV: case BC_DIVVV:
3343 | ins_arith intmod, fpmod
3345 case BC_MODNV: case BC_MODVV:
3346 | ins_arith intmod, fpmod_
3349 | // NYI: (partial) integer arithmetic.
3350 | lwzx TMP1, BASE, RB
3351 | lfdx FARG1, BASE, RB
3352 | lwzx TMP2, BASE, RC
3353 | lfdx FARG2, BASE, RC
3354 | checknum cr0, TMP1
3355 | checknum cr1, TMP2
3356 | crand 4*cr0+lt, 4*cr0+lt, 4*cr1+lt
3357 | bge ->vmeta_arith_vv
3360 | stfdx FARG1, BASE, RA
3365 | // RA = dst*8, RB = src_start*8, RC = src_end*8
3368 | add CARG2, BASE, RC
3373 | srwi CARG3, CARG3, 3
3374 | bl extern lj_meta_cat // (lua_State *L, TValue *top, int left)
3375 | // Returns NULL (finished) or TValue * (metamethod).
3380 | lfdx f0, BASE, SAVE0 // Copy result from RB to RA.
3381 | stfdx f0, BASE, RA
3385 /* -- Constant ops ------------------------------------------------------ */
3388 | // RA = dst*8, RD = str_const*8 (~)
3390 | subfic TMP1, TMP1, -4
3392 | lwzx TMP0, KBASE, TMP1 // KBASE-4-str_const*4
3394 | stwux TMP2, RA, BASE
3400 | // RA = dst*8, RD = cdata_const*8 (~)
3402 | subfic TMP1, TMP1, -4
3404 | lwzx TMP0, KBASE, TMP1 // KBASE-4-cdata_const*4
3405 | li TMP2, LJ_TCDATA
3406 | stwux TMP2, RA, BASE
3412 | // RA = dst*8, RD = int16_literal*8
3417 | stwux TISNUM, RA, BASE
3421 | // The soft-float approach is faster.
3423 | srawi TMP1, RD, 31
3424 | xor TMP2, TMP1, RD
3425 | sub TMP2, TMP2, TMP1 // TMP2 = abs(x)
3427 | subfic TMP1, TMP3, 0x40d // TMP1 = exponent-1
3428 | slw TMP2, TMP2, TMP3 // TMP2 = left aligned mantissa
3429 | subfic TMP3, RD, 0
3430 | slwi TMP1, TMP1, 20
3431 | rlwimi RD, TMP2, 21, 1, 31 // hi = sign(x) | (mantissa>>11)
3432 | subfe TMP0, TMP0, TMP0
3433 | add RD, RD, TMP1 // hi = hi + exponent-1
3434 | and RD, RD, TMP0 // hi = x == 0 ? 0 : hi
3436 | stwux RD, RA, BASE
3442 | // RA = dst*8, RD = num_const*8
3444 | lfdx f0, KBASE, RD
3445 | stfdx f0, BASE, RA
3449 | // RA = dst*8, RD = primitive_type*8 (~)
3453 | stwx TMP0, BASE, RA
3457 | // RA = base*8, RD = end*8
3458 | stwx TISNIL, BASE, RA
3461 | stwx TISNIL, BASE, RA
3468 /* -- Upvalue and function ops ------------------------------------------ */
3471 | // RA = dst*8, RD = uvnum*8
3472 | lwz LFUNC:RB, FRAME_FUNC(BASE)
3474 | addi RD, RD, offsetof(GCfuncL, uvptr)
3475 | lwzx UPVAL:RB, LFUNC:RB, RD
3477 | lwz TMP1, UPVAL:RB->v
3479 | stfdx f0, BASE, RA
3483 | // RA = uvnum*8, RD = src*8
3484 | lwz LFUNC:RB, FRAME_FUNC(BASE)
3486 | addi RA, RA, offsetof(GCfuncL, uvptr)
3487 | lfdux f0, RD, BASE
3488 | lwzx UPVAL:RB, LFUNC:RB, RA
3489 | lbz TMP3, UPVAL:RB->marked
3490 | lwz CARG2, UPVAL:RB->v
3491 | andi. TMP3, TMP3, LJ_GC_BLACK // isblack(uv)
3492 | lbz TMP0, UPVAL:RB->closed
3495 | cmplwi cr1, TMP0, 0
3497 | cror 4*cr0+eq, 4*cr0+eq, 4*cr1+eq
3498 | subi TMP2, TMP2, (LJ_TISNUM+1)
3499 | bne >2 // Upvalue is closed and black?
3503 |2: // Check if new value is collectable.
3504 | cmplwi TMP2, LJ_TISGCV - (LJ_TISNUM+1)
3505 | bge <1 // tvisgcv(v)
3506 | lbz TMP3, GCOBJ:TMP1->gch.marked
3507 | andi. TMP3, TMP3, LJ_GC_WHITES // iswhite(v)
3508 | la CARG1, GG_DISP2G(DISPATCH)
3509 | // Crossed a write barrier. Move the barrier forward.
3511 | bl extern lj_gc_barrieruv // (global_State *g, TValue *tv)
3515 | // RA = uvnum*8, RD = str_const*8 (~)
3516 | lwz LFUNC:RB, FRAME_FUNC(BASE)
3519 | subfic TMP1, TMP1, -4
3520 | addi RA, RA, offsetof(GCfuncL, uvptr)
3521 | lwzx STR:TMP1, KBASE, TMP1 // KBASE-4-str_const*4
3522 | lwzx UPVAL:RB, LFUNC:RB, RA
3523 | lbz TMP3, UPVAL:RB->marked
3524 | lwz CARG2, UPVAL:RB->v
3525 | andi. TMP3, TMP3, LJ_GC_BLACK // isblack(uv)
3526 | lbz TMP3, STR:TMP1->marked
3527 | lbz TMP2, UPVAL:RB->closed
3529 | stw STR:TMP1, 4(CARG2)
3530 | stw TMP0, 0(CARG2)
3535 |2: // Check if string is white and ensure upvalue is closed.
3536 | andi. TMP3, TMP3, LJ_GC_WHITES // iswhite(str)
3537 | cmplwi cr1, TMP2, 0
3538 | cror 4*cr0+eq, 4*cr0+eq, 4*cr1+eq
3539 | la CARG1, GG_DISP2G(DISPATCH)
3540 | // Crossed a write barrier. Move the barrier forward.
3542 | bl extern lj_gc_barrieruv // (global_State *g, TValue *tv)
3546 | // RA = uvnum*8, RD = num_const*8
3547 | lwz LFUNC:RB, FRAME_FUNC(BASE)
3549 | addi RA, RA, offsetof(GCfuncL, uvptr)
3550 | lfdx f0, KBASE, RD
3551 | lwzx UPVAL:RB, LFUNC:RB, RA
3553 | lwz TMP1, UPVAL:RB->v
3558 | // RA = uvnum*8, RD = primitive_type*8 (~)
3559 | lwz LFUNC:RB, FRAME_FUNC(BASE)
3562 | addi RA, RA, offsetof(GCfuncL, uvptr)
3564 | lwzx UPVAL:RB, LFUNC:RB, RA
3566 | lwz TMP1, UPVAL:RB->v
3572 | // RA = level*8, RD = target
3573 | lwz TMP1, L->openupval
3574 | branch_RD // Do this first since RD is not saved.
3579 | add CARG2, BASE, RA
3580 | bl extern lj_func_closeuv // (lua_State *L, TValue *level)
3587 | // RA = dst*8, RD = proto_const*8 (~) (holding function prototype)
3590 | subfic TMP1, TMP1, -4
3592 | lwzx CARG2, KBASE, TMP1 // KBASE-4-tab_const*4
3594 | lwz CARG3, FRAME_FUNC(BASE)
3595 | // (lua_State *L, GCproto *pt, GCfuncL *parent)
3596 | bl extern lj_func_newL_gc
3597 | // Returns GCfuncL *.
3600 | stwux TMP0, RA, BASE
3601 | stw LFUNC:CRET1, 4(RA)
3605 /* -- Table ops --------------------------------------------------------- */
3609 | // RA = dst*8, RD = (hbits|asize)*8 | tab_const*8 (~)
3610 | lwz TMP0, DISPATCH_GL(gc.total)(DISPATCH)
3612 | lwz TMP1, DISPATCH_GL(gc.threshold)(DISPATCH)
3618 if (op == BC_TNEW) {
3619 | rlwinm CARG2, RD, 29, 21, 31
3620 | rlwinm CARG3, RD, 18, 27, 31
3621 | cmpwi CARG2, 0x7ff; beq >3
3623 | bl extern lj_tab_new // (lua_State *L, int32_t asize, uint32_t hbits)
3624 | // Returns Table *.
3627 | subfic TMP1, TMP1, -4
3628 | lwzx CARG2, KBASE, TMP1 // KBASE-4-tab_const*4
3629 | bl extern lj_tab_dup // (lua_State *L, Table *kt)
3630 | // Returns Table *.
3634 | stwux TMP0, RA, BASE
3635 | stw TAB:CRET1, 4(RA)
3637 if (op == BC_TNEW) {
3644 | bl extern lj_gc_step_fixtop // (lua_State *L)
3651 | // RA = dst*8, RD = str_const*8 (~)
3653 | // RA = src*8, RD = str_const*8 (~)
3654 | lwz LFUNC:TMP2, FRAME_FUNC(BASE)
3656 | lwz TAB:RB, LFUNC:TMP2->env
3657 | subfic TMP1, TMP1, -4
3658 | lwzx STR:RC, KBASE, TMP1 // KBASE-4-str_const*4
3659 if (op == BC_GGET) {
3667 | // RA = dst*8, RB = table*8, RC = key*8
3668 | lwzux CARG1, RB, BASE
3669 | lwzux CARG2, RC, BASE
3677 | checknum cr1, CARG2
3680 | lwz TMP0, TAB:RB->asize
3682 | lwz TMP1, TAB:RB->array
3687 | // Convert number key to integer, check for integerness and range.
3689 | fadd f2, f0, TOBIT
3691 | lwz TMP0, TAB:RB->asize
3692 | fsub f2, f2, TOBIT
3694 | lwz TMP1, TAB:RB->array
3696 | cmplw cr0, TMP0, TMP2
3697 | crand 4*cr0+gt, 4*cr0+gt, 4*cr1+eq
3698 | slwi TMP2, TMP2, 3
3700 | ble ->vmeta_tgetv // Integer key and in array part?
3701 | lwzx TMP0, TMP1, TMP2
3702 | lfdx f14, TMP1, TMP2
3703 | checknil TMP0; beq >2
3706 | stfdx f14, BASE, RA
3709 |2: // Check for __index if table value is nil.
3710 | lwz TAB:TMP2, TAB:RB->metatable
3711 | cmplwi TAB:TMP2, 0
3712 | beq <1 // No metatable: done.
3713 | lbz TMP0, TAB:TMP2->nomm
3714 | andi. TMP0, TMP0, 1<<MM_index
3715 | bne <1 // 'no __index' flag set: done.
3719 | checkstr CARG2; bne ->vmeta_tgetv
3723 | b ->BC_TGETS_Z // String key?
3726 | // RA = dst*8, RB = table*8, RC = str_const*8 (~)
3727 | lwzux CARG1, RB, BASE
3730 | subfic TMP1, TMP1, -4
3732 | lwzx STR:RC, KBASE, TMP1 // KBASE-4-str_const*4
3733 | bne ->vmeta_tgets1
3735 | // TAB:RB = GCtab *, STR:RC = GCstr *, RA = dst*8
3736 | lwz TMP0, TAB:RB->hmask
3737 | lwz TMP1, STR:RC->hash
3738 | lwz NODE:TMP2, TAB:RB->node
3739 | and TMP1, TMP1, TMP0 // idx = str->hash & tab->hmask
3740 | slwi TMP0, TMP1, 5
3741 | slwi TMP1, TMP1, 3
3742 | sub TMP1, TMP0, TMP1
3743 | add NODE:TMP2, NODE:TMP2, TMP1 // node = tab->node + (idx*32-idx*8)
3745 | lwz CARG1, NODE:TMP2->key
3746 | lwz TMP0, 4+offsetof(Node, key)(NODE:TMP2)
3747 | lwz CARG2, NODE:TMP2->val
3748 | lwz TMP1, 4+offsetof(Node, val)(NODE:TMP2)
3749 | checkstr CARG1; bne >4
3750 | cmpw TMP0, STR:RC; bne >4
3751 | checknil CARG2; beq >5 // Key found, but nil value?
3753 | stwux CARG2, RA, BASE
3757 |4: // Follow hash chain.
3758 | lwz NODE:TMP2, NODE:TMP2->next
3759 | cmplwi NODE:TMP2, 0
3761 | // End of hash chain: key not found, nil result.
3764 |5: // Check for __index if table value is nil.
3765 | lwz TAB:TMP2, TAB:RB->metatable
3766 | cmplwi TAB:TMP2, 0
3767 | beq <3 // No metatable: done.
3768 | lbz TMP0, TAB:TMP2->nomm
3769 | andi. TMP0, TMP0, 1<<MM_index
3770 | bne <3 // 'no __index' flag set: done.
3774 | // RA = dst*8, RB = table*8, RC = index*8
3775 | lwzux CARG1, RB, BASE
3778 | checktab CARG1; bne ->vmeta_tgetb
3779 | lwz TMP1, TAB:RB->asize
3780 | lwz TMP2, TAB:RB->array
3781 | cmplw TMP0, TMP1; bge ->vmeta_tgetb
3782 | lwzx TMP1, TMP2, RC
3784 | checknil TMP1; beq >5
3787 | stfdx f0, BASE, RA
3790 |5: // Check for __index if table value is nil.
3791 | lwz TAB:TMP2, TAB:RB->metatable
3792 | cmplwi TAB:TMP2, 0
3793 | beq <1 // No metatable: done.
3794 | lbz TMP2, TAB:TMP2->nomm
3795 | andi. TMP2, TMP2, 1<<MM_index
3796 | bne <1 // 'no __index' flag set: done.
3797 | b ->vmeta_tgetb // Caveat: preserve TMP0!
3801 | // RA = src*8, RB = table*8, RC = key*8
3802 | lwzux CARG1, RB, BASE
3803 | lwzux CARG2, RC, BASE
3811 | checknum cr1, CARG2
3814 | lwz TMP0, TAB:RB->asize
3816 | lwz TMP1, TAB:RB->array
3821 | // Convert number key to integer, check for integerness and range.
3823 | fadd f2, f0, TOBIT
3825 | lwz TMP0, TAB:RB->asize
3826 | fsub f2, f2, TOBIT
3828 | lwz TMP1, TAB:RB->array
3830 | cmplw cr0, TMP0, TMP2
3831 | crand 4*cr0+gt, 4*cr0+gt, 4*cr1+eq
3832 | slwi TMP0, TMP2, 3
3834 | ble ->vmeta_tsetv // Integer key and in array part?
3835 | lwzx TMP2, TMP1, TMP0
3836 | lbz TMP3, TAB:RB->marked
3837 | lfdx f14, BASE, RA
3838 | checknil TMP2; beq >3
3840 | andi. TMP2, TMP3, LJ_GC_BLACK // isblack(table)
3841 | stfdx f14, TMP1, TMP0
3846 |3: // Check for __newindex if previous value is nil.
3847 | lwz TAB:TMP2, TAB:RB->metatable
3848 | cmplwi TAB:TMP2, 0
3849 | beq <1 // No metatable: done.
3850 | lbz TMP2, TAB:TMP2->nomm
3851 | andi. TMP2, TMP2, 1<<MM_newindex
3852 | bne <1 // 'no __newindex' flag set: done.
3856 | checkstr CARG2; bne ->vmeta_tsetv
3860 | b ->BC_TSETS_Z // String key?
3862 |7: // Possible table write barrier for the value. Skip valiswhite check.
3863 | barrierback TAB:RB, TMP3, TMP0
3867 | // RA = src*8, RB = table*8, RC = str_const*8 (~)
3868 | lwzux CARG1, RB, BASE
3871 | subfic TMP1, TMP1, -4
3873 | lwzx STR:RC, KBASE, TMP1 // KBASE-4-str_const*4
3874 | bne ->vmeta_tsets1
3876 | // TAB:RB = GCtab *, STR:RC = GCstr *, RA = src*8
3877 | lwz TMP0, TAB:RB->hmask
3878 | lwz TMP1, STR:RC->hash
3879 | lwz NODE:TMP2, TAB:RB->node
3880 | stb ZERO, TAB:RB->nomm // Clear metamethod cache.
3881 | and TMP1, TMP1, TMP0 // idx = str->hash & tab->hmask
3882 | lfdx f14, BASE, RA
3883 | slwi TMP0, TMP1, 5
3884 | slwi TMP1, TMP1, 3
3885 | sub TMP1, TMP0, TMP1
3886 | lbz TMP3, TAB:RB->marked
3887 | add NODE:TMP2, NODE:TMP2, TMP1 // node = tab->node + (idx*32-idx*8)
3889 | lwz CARG1, NODE:TMP2->key
3890 | lwz TMP0, 4+offsetof(Node, key)(NODE:TMP2)
3891 | lwz CARG2, NODE:TMP2->val
3892 | lwz NODE:TMP1, NODE:TMP2->next
3893 | checkstr CARG1; bne >5
3894 | cmpw TMP0, STR:RC; bne >5
3895 | checknil CARG2; beq >4 // Key found, but nil value?
3897 | andi. TMP0, TMP3, LJ_GC_BLACK // isblack(table)
3898 | stfd f14, NODE:TMP2->val
3903 |4: // Check for __newindex if previous value is nil.
3904 | lwz TAB:TMP1, TAB:RB->metatable
3905 | cmplwi TAB:TMP1, 0
3906 | beq <2 // No metatable: done.
3907 | lbz TMP0, TAB:TMP1->nomm
3908 | andi. TMP0, TMP0, 1<<MM_newindex
3909 | bne <2 // 'no __newindex' flag set: done.
3912 |5: // Follow hash chain.
3913 | cmplwi NODE:TMP1, 0
3914 | mr NODE:TMP2, NODE:TMP1
3916 | // End of hash chain: key not found, add a new one.
3918 | // But check for __newindex first.
3919 | lwz TAB:TMP1, TAB:RB->metatable
3920 | la CARG3, DISPATCH_GL(tmptv)(DISPATCH)
3923 | cmplwi TAB:TMP1, 0
3925 | beq >6 // No metatable: continue.
3926 | lbz TMP0, TAB:TMP1->nomm
3927 | andi. TMP0, TMP0, 1<<MM_newindex
3928 | beq ->vmeta_tsets // 'no __newindex' flag NOT set: check.
3931 | stw STR:RC, 4(CARG3)
3933 | stw TMP0, 0(CARG3)
3934 | bl extern lj_tab_newkey // (lua_State *L, GCtab *t, TValue *k)
3935 | // Returns TValue *.
3937 | stfd f14, 0(CRET1)
3938 | b <3 // No 2nd write barrier needed.
3940 |7: // Possible table write barrier for the value. Skip valiswhite check.
3941 | barrierback TAB:RB, TMP3, TMP0
3945 | // RA = src*8, RB = table*8, RC = index*8
3946 | lwzux CARG1, RB, BASE
3949 | checktab CARG1; bne ->vmeta_tsetb
3950 | lwz TMP1, TAB:RB->asize
3951 | lwz TMP2, TAB:RB->array
3952 | lbz TMP3, TAB:RB->marked
3954 | lfdx f14, BASE, RA
3956 | lwzx TMP1, TMP2, RC
3957 | checknil TMP1; beq >5
3959 | andi. TMP0, TMP3, LJ_GC_BLACK // isblack(table)
3960 | stfdx f14, TMP2, RC
3965 |5: // Check for __newindex if previous value is nil.
3966 | lwz TAB:TMP1, TAB:RB->metatable
3967 | cmplwi TAB:TMP1, 0
3968 | beq <1 // No metatable: done.
3969 | lbz TMP1, TAB:TMP1->nomm
3970 | andi. TMP1, TMP1, 1<<MM_newindex
3971 | bne <1 // 'no __newindex' flag set: done.
3972 | b ->vmeta_tsetb // Caveat: preserve TMP0!
3974 |7: // Possible table write barrier for the value. Skip valiswhite check.
3975 | barrierback TAB:RB, TMP3, TMP0
3980 | // RA = base*8 (table at base-1), RD = num_const*8 (start index)
3983 | add TMP3, KBASE, RD
3984 | lwz TAB:CARG2, -4(RA) // Guaranteed to be a table.
3985 | addic. TMP0, MULTRES, -8
3986 | lwz TMP3, 4(TMP3) // Integer constant is in lo-word.
3987 | srwi CARG3, TMP0, 3
3988 | beq >4 // Nothing to copy?
3989 | add CARG3, CARG3, TMP3
3990 | lwz TMP2, TAB:CARG2->asize
3991 | slwi TMP1, TMP3, 3
3992 | lbz TMP3, TAB:CARG2->marked
3994 | add TMP2, RA, TMP0
3995 | lwz TMP0, TAB:CARG2->array
3997 | add TMP1, TMP1, TMP0
3998 | andi. TMP0, TMP3, LJ_GC_BLACK // isblack(table)
3999 |3: // Copy result slots to table.
4002 | cmpw cr1, RA, TMP2
4004 | addi TMP1, TMP1, 8
4010 |5: // Need to resize array part.
4015 | bl extern lj_tab_reasize // (lua_State *L, GCtab *t, int nasize)
4016 | // Must not reallocate the stack.
4020 |7: // Possible table write barrier for any value. Skip valiswhite check.
4021 | barrierback TAB:CARG2, TMP3, TMP0
4025 /* -- Calls and vararg handling ----------------------------------------- */
4028 | // RA = base*8, (RB = (nresults+1)*8,) RC = extra_nargs*8
4029 | add NARGS8:RC, NARGS8:RC, MULTRES
4030 | // Fall through. Assumes BC_CALL follows.
4033 | // RA = base*8, (RB = (nresults+1)*8,) RC = (nargs+1)*8
4035 | lwzux TMP0, BASE, RA
4036 | lwz LFUNC:RB, 4(BASE)
4037 | subi NARGS8:RC, NARGS8:RC, 8
4038 | addi BASE, BASE, 8
4039 | checkfunc TMP0; bne ->vmeta_call
4044 | // RA = base*8, (RB = 0,) RC = extra_nargs*8
4045 | add NARGS8:RC, NARGS8:RC, MULTRES
4046 | // Fall through. Assumes BC_CALLT follows.
4049 | // RA = base*8, (RB = 0,) RC = (nargs+1)*8
4050 | lwzux TMP0, RA, BASE
4051 | lwz LFUNC:RB, 4(RA)
4052 | subi NARGS8:RC, NARGS8:RC, 8
4053 | lwz TMP1, FRAME_PC(BASE)
4058 | andi. TMP0, TMP1, FRAME_TYPE // Caveat: preserve cr0 until the crand.
4059 | lbz TMP3, LFUNC:RB->ffid
4060 | xori TMP2, TMP1, FRAME_VARG
4061 | cmplwi cr1, NARGS8:RC, 0
4064 | stw LFUNC:RB, FRAME_FUNC(BASE) // Copy function down, but keep PC.
4066 | cmplwi cr7, TMP3, 1 // (> FF_C) Calling a fast function?
4069 | addi TMP3, TMP2, 8
4071 | cmplw cr1, TMP3, NARGS8:RC
4072 | stfdx f0, BASE, TMP2
4076 | crand 4*cr0+eq, 4*cr0+eq, 4*cr7+gt
4081 |5: // Tailcall to a fast function with a Lua frame below.
4083 | decode_RA8 RA, INS
4084 | sub TMP1, BASE, RA
4085 | lwz LFUNC:TMP1, FRAME_FUNC-8(TMP1)
4086 | lwz TMP1, LFUNC:TMP1->pc
4087 | lwz KBASE, PC2PROTO(k)(TMP1) // Need to prepare KBASE.
4090 |7: // Tailcall from a vararg function.
4091 | andi. TMP0, TMP2, FRAME_TYPEP
4092 | bne <1 // Vararg frame below?
4093 | sub BASE, BASE, TMP2 // Relocate BASE down.
4094 | lwz TMP1, FRAME_PC(BASE)
4095 | andi. TMP0, TMP1, FRAME_TYPE
4100 | // RA = base*8, (RB = (nresults+1)*8, RC = (nargs+1)*8 ((2+1)*8))
4102 | add BASE, BASE, RA
4103 | lwz TMP1, -24(BASE)
4104 | lwz LFUNC:RB, -20(BASE)
4107 | stw TMP1, 0(BASE) // Copy callable.
4108 | stw LFUNC:RB, 4(BASE)
4110 | stfd f1, 16(BASE) // Copy control var.
4111 | li NARGS8:RC, 16 // Iterators get 2 arguments.
4112 | stfdu f0, 8(BASE) // Copy state.
4118 | // RA = base*8, (RB = (nresults+1)*8, RC = (nargs+1)*8 (2+1)*8)
4120 | // NYI: add hotloop, record BC_ITERN.
4123 | lwz TAB:RB, -12(RA)
4124 | lwz RC, -4(RA) // Get index from control var.
4125 | lwz TMP0, TAB:RB->asize
4126 | lwz TMP1, TAB:RB->array
4128 |1: // Traverse array part.
4131 | bge >5 // Index points after array part?
4132 | lwzx TMP2, TMP1, TMP3
4133 | lfdx f0, TMP1, TMP3
4144 | addis TMP3, PC, -(BCBIAS_J*4 >> 16)
4146 | decode_RD4 TMP1, INS
4147 | stw RC, -4(RA) // Update control var.
4148 | add PC, TMP1, TMP3
4155 |4: // Skip holes in array part.
4159 |5: // Traverse hash part.
4160 | lwz TMP1, TAB:RB->hmask
4162 | lwz TMP2, TAB:RB->node
4164 | cmplw RC, TMP1 // End of iteration? Branch to ITERL+1.
4168 | sub TMP3, TMP3, RB
4169 | lwzx RB, TMP2, TMP3
4170 | lfdx f0, TMP2, TMP3
4171 | add NODE:TMP3, TMP2, TMP3
4175 | lfd f1, NODE:TMP3->key
4176 | addis TMP2, PC, -(BCBIAS_J*4 >> 16)
4179 | decode_RD4 TMP1, INS
4182 | add PC, TMP1, TMP2
4183 | stw RC, -4(RA) // Update control var.
4186 |7: // Skip holes in hash part.
4192 | // RA = base*8, RD = target (points to ITERN)
4195 | lwz CFUNC:TMP1, -20(RA)
4198 | cmpwi cr0, TMP2, LJ_TTAB
4199 | cmpwi cr1, TMP0, LJ_TFUNC
4200 | cmpwi cr6, TMP3, LJ_TNIL
4202 | lbz TMP1, CFUNC:TMP1->ffid
4203 | crand 4*cr0+eq, 4*cr0+eq, 4*cr6+eq
4204 | cmpwi cr7, TMP1, FF_next_N
4206 | crand 4*cr0+eq, 4*cr0+eq, 4*cr7+eq
4207 | add TMP3, PC, TMP0
4209 | stw ZERO, -4(RA) // Initialize control var.
4210 | addis PC, TMP3, -(BCBIAS_J*4 >> 16)
4213 |5: // Despecialize bytecode if any of the checks fail.
4217 | addis PC, TMP3, -(BCBIAS_J*4 >> 16)
4223 | // RA = base*8, RB = (nresults+1)*8, RC = numparams*8
4224 | lwz TMP0, FRAME_PC(BASE)
4227 | addi RC, RC, FRAME_VARG
4229 | subi TMP3, BASE, 8 // TMP3 = vtop
4230 | sub RC, RC, TMP0 // RC = vbase
4231 | // Note: RC may now be even _above_ BASE if nargs was < numparams.
4233 | sub. TMP1, TMP3, RC
4234 | beq cr1, >5 // Copy all varargs?
4235 | subi TMP2, TMP2, 16
4236 | ble >2 // No vararg slots?
4237 |1: // Copy vararg slots to destination slots.
4242 | cmplw cr1, RC, TMP3
4243 | bge >3 // All destination slots filled?
4245 | blt cr1, <1 // More vararg slots?
4246 |2: // Fill up remainder with nil.
4254 |5: // Copy all varargs.
4255 | lwz TMP0, L->maxstack
4256 | li MULTRES, 8 // MULTRES = (0+1)*8
4257 | bley <3 // No vararg slots?
4258 | add TMP2, RA, TMP1
4260 | addi MULTRES, TMP1, 8
4268 | blt <6 // More vararg slots?
4271 |7: // Grow stack for varargs.
4274 | sub SAVE0, RC, BASE // Need delta, because BASE may change.
4278 | srwi CARG2, TMP1, 3
4279 | bl extern lj_state_growstack // (lua_State *L, int n)
4282 | add RC, BASE, SAVE0
4283 | subi TMP3, BASE, 8
4287 /* -- Returns ----------------------------------------------------------- */
4290 | // RA = results*8, RD = extra_nresults*8
4291 | add RD, RD, MULTRES // MULTRES >= 8, so RD >= 8.
4292 | // Fall through. Assumes BC_RET follows.
4296 | // RA = results*8, RD = (nresults+1)*8
4297 | lwz PC, FRAME_PC(BASE)
4301 | andi. TMP0, PC, FRAME_TYPE
4302 | xori TMP1, PC, FRAME_VARG
4306 | // BASE = base, RA = resultptr, RD = (nresults+1)*8, PC = return
4309 | subi TMP2, BASE, 8
4311 | decode_RB8 RB, INS
4315 | addi TMP3, TMP1, 8
4318 | stfdx f0, TMP2, TMP1
4320 | addi TMP1, TMP3, 8
4323 | stfdx f1, TMP2, TMP3
4328 | decode_RA8 RA, INS
4330 | sub BASE, TMP2, RA
4331 | lwz LFUNC:TMP1, FRAME_FUNC(BASE)
4333 | lwz TMP1, LFUNC:TMP1->pc
4334 | lwz KBASE, PC2PROTO(k)(TMP1)
4337 |6: // Fill up results with nil.
4340 | stwx TISNIL, TMP2, TMP1
4343 |->BC_RETV_Z: // Non-standard return case.
4344 | andi. TMP2, TMP1, FRAME_TYPEP
4346 | // Return from vararg function: relocate BASE down.
4347 | sub BASE, BASE, TMP1
4348 | lwz PC, FRAME_PC(BASE)
4352 case BC_RET0: case BC_RET1:
4353 | // RA = results*8, RD = (nresults+1)*8
4354 | lwz PC, FRAME_PC(BASE)
4357 | andi. TMP0, PC, FRAME_TYPE
4358 | xori TMP1, PC, FRAME_VARG
4362 | subi TMP2, BASE, 8
4363 | decode_RB8 RB, INS
4364 if (op == BC_RET1) {
4370 | decode_RA8 RA, INS
4372 | sub BASE, TMP2, RA
4373 | lwz LFUNC:TMP1, FRAME_FUNC(BASE)
4375 | lwz TMP1, LFUNC:TMP1->pc
4376 | lwz KBASE, PC2PROTO(k)(TMP1)
4379 |6: // Fill up results with nil.
4382 | stwx TISNIL, TMP2, TMP1
4386 /* -- Loops and branches ------------------------------------------------ */
4392 | // Fall through. Assumes BC_IFORL follows.
4402 | // RA = base*8, RD = target (after end of loop or start of loop)
4403 vk = (op == BC_IFORL || op == BC_JFORL);
4406 | lwzux TMP1, RA, BASE
4407 | lwz CARG1, FORL_IDX*8+4(RA)
4408 | cmplw cr0, TMP1, TISNUM
4410 | lwz CARG3, FORL_STEP*8+4(RA)
4412 | addo. CARG1, CARG1, CARG3
4413 | cmpwi cr6, CARG3, 0
4414 | lwz CARG2, FORL_STOP*8+4(RA)
4417 | stw CARG1, FORL_IDX*8+4(RA)
4419 | lwz TMP3, FORL_STEP*8(RA)
4420 | lwz CARG3, FORL_STEP*8+4(RA)
4421 | lwz TMP2, FORL_STOP*8(RA)
4422 | lwz CARG2, FORL_STOP*8+4(RA)
4423 | cmplw cr7, TMP3, TISNUM
4424 | cmplw cr1, TMP2, TISNUM
4425 | crand 4*cr0+eq, 4*cr0+eq, 4*cr7+eq
4426 | crand 4*cr0+eq, 4*cr0+eq, 4*cr1+eq
4427 | cmpwi cr6, CARG3, 0
4433 | stw TISNUM, FORL_EXT*8(RA)
4434 if (op != BC_JFORL) {
4437 | stw CARG1, FORL_EXT*8+4(RA)
4438 if (op != BC_JFORL) {
4441 if (op == BC_FORI) {
4442 | bgt >3 // See FP loop below.
4443 } else if (op == BC_JFORI) {
4444 | addis PC, RD, -(BCBIAS_J*4 >> 16)
4446 } else if (op == BC_IFORL) {
4448 | addis PC, RD, -(BCBIAS_J*4 >> 16)
4454 |5: // Invert check for negative step.
4458 |6: // Potential overflow.
4459 | mcrxr cr0; bley <4 // Ignore unrelated overflow.
4466 | lfd f1, FORL_IDX*8(RA)
4468 | lfdux f1, RA, BASE
4470 | lfd f3, FORL_STEP*8(RA)
4471 | lfd f2, FORL_STOP*8(RA)
4472 | lwz TMP3, FORL_STEP*8(RA)
4474 | stfd f1, FORL_IDX*8(RA)
4479 | lwzux TMP1, RA, BASE
4480 | lwz TMP3, FORL_STEP*8(RA)
4481 | lwz TMP2, FORL_STOP*8(RA)
4482 | cmplw cr0, TMP1, TISNUM
4483 | cmplw cr7, TMP3, TISNUM
4484 | cmplw cr1, TMP2, TISNUM
4486 | lfd f1, FORL_IDX*8(RA)
4487 | crand 4*cr0+lt, 4*cr0+lt, 4*cr7+lt
4488 | crand 4*cr0+lt, 4*cr0+lt, 4*cr1+lt
4489 | lfd f2, FORL_STOP*8(RA)
4492 | cmpwi cr6, TMP3, 0
4493 if (op != BC_JFORL) {
4496 | stfd f1, FORL_EXT*8(RA)
4497 if (op != BC_JFORL) {
4501 if (op == BC_JFORI) {
4502 | addis PC, RD, -(BCBIAS_J*4 >> 16)
4505 if (op == BC_FORI) {
4507 } else if (op == BC_IFORL) {
4514 | addis PC, RD, -(BCBIAS_J*4 >> 16)
4515 } else if (op == BC_JFORI) {
4526 |5: // Negative step.
4527 if (op == BC_FORI) {
4529 |3: // Used by integer loop, too.
4530 | addis PC, RD, -(BCBIAS_J*4 >> 16)
4531 } else if (op == BC_IFORL) {
4533 } else if (op == BC_JFORI) {
4539 if (op == BC_JFORI) {
4542 | decode_RD8 RD, INS
4551 | // Fall through. Assumes BC_IITERL follows.
4559 | // RA = base*8, RD = target
4560 | lwzux TMP1, RA, BASE
4562 | checknil TMP1; beq >1 // Stop if iterator returned nil.
4563 if (op == BC_JITERL) {
4568 | branch_RD // Otherwise save control var + branch.
4577 | // RA = base*8, RD = target (loop extent)
4578 | // Note: RA/RD is only used by trace recorder to determine scope/extent
4579 | // This opcode does NOT jump, it's only purpose is to detect a hot loop.
4583 | // Fall through. Assumes BC_ILOOP follows.
4587 | // RA = base*8, RD = target (loop extent)
4593 | // RA = base*8 (ignored), RD = traceno*8
4594 | lwz TMP1, DISPATCH_J(trace)(DISPATCH)
4596 | // Traces on PPC don't store the trace number, so use 0.
4597 | stw ZERO, DISPATCH_GL(vmstate)(DISPATCH)
4598 | lwzx TRACE:TMP2, TMP1, RD
4599 | mcrxr cr0 // Clear SO flag.
4600 | lwz TMP2, TRACE:TMP2->mcode
4601 | stw BASE, DISPATCH_GL(jit_base)(DISPATCH)
4603 | stw L, DISPATCH_GL(jit_L)(DISPATCH)
4604 | addi JGL, DISPATCH, GG_DISP2G+32768
4610 | // RA = base*8 (only used by trace recorder), RD = target
4615 /* -- Function headers -------------------------------------------------- */
4621 case BC_FUNCV: /* NYI: compiled vararg functions. */
4622 | // Fall through. Assumes BC_IFUNCF/BC_IFUNCV follow.
4630 | // BASE = new base, RA = BASE+framesize*8, RB = LFUNC, RC = nargs*8
4631 | lwz TMP2, L->maxstack
4632 | lbz TMP1, -4+PC2PROTO(numparams)(PC)
4633 | lwz KBASE, -4+PC2PROTO(k)(PC)
4635 | slwi TMP1, TMP1, 3
4636 | bgt ->vm_growstack_l
4637 if (op != BC_JFUNCF) {
4641 | cmplw NARGS8:RC, TMP1 // Check for missing parameters.
4643 if (op == BC_JFUNCF) {
4644 | decode_RD8 RD, INS
4650 |3: // Clear missing parameters.
4651 | stwx TISNIL, BASE, NARGS8:RC
4652 | addi NARGS8:RC, NARGS8:RC, 8
4660 | NYI // NYI: compiled vararg functions
4661 break; /* NYI: compiled vararg functions. */
4664 | // BASE = new base, RA = BASE+framesize*8, RB = LFUNC, RC = nargs*8
4665 | lwz TMP2, L->maxstack
4666 | add TMP1, BASE, RC
4668 | stw LFUNC:RB, 4(TMP1) // Store copy of LFUNC.
4669 | addi TMP3, RC, 8+FRAME_VARG
4670 | lwz KBASE, -4+PC2PROTO(k)(PC)
4672 | stw TMP3, 0(TMP1) // Store delta + FRAME_VARG.
4673 | bge ->vm_growstack_l
4674 | lbz TMP2, -4+PC2PROTO(numparams)(PC)
4679 | addi BASE, TMP1, 8
4682 | cmplw RA, RC // Less args than parameters?
4686 | stw TISNIL, 0(RA) // Clear old fixarg slot (help the GC).
4689 | addic. TMP2, TMP2, -1
4691 | stw TMP3, 12(TMP1)
4692 | addi TMP1, TMP1, 8
4697 |4: // Clear missing parameters.
4704 | // BASE = new base, RA = BASE+framesize*8, RB = CFUNC, RC = nargs*8
4705 if (op == BC_FUNCC) {
4706 | lwz TMP3, CFUNC:RB->f
4708 | lwz TMP3, DISPATCH_GL(wrapf)(DISPATCH)
4710 | add TMP1, RA, NARGS8:RC
4711 | lwz TMP2, L->maxstack
4712 | add RC, BASE, NARGS8:RC
4718 if (op == BC_FUNCCW) {
4719 | lwz CARG2, CFUNC:RB->f
4722 | bgt ->vm_growstack_c // Need to grow stack.
4724 | bctrl // (lua_State *L [, lua_CFunction f])
4725 | // Returns nresults.
4730 | lwz PC, FRAME_PC(BASE) // Fetch PC of caller.
4731 | sub RA, TMP1, RD // RA = L->top - nresults*8
4736 /* ---------------------------------------------------------------------- */
4739 fprintf(stderr, "Error: undefined opcode BC_%s\n", bc_names[op]);
4745 static int build_backend(BuildCtx *ctx)
4749 dasm_growpc(Dst, BC__MAX);
4751 build_subroutines(ctx);
4754 for (op = 0; op < BC__MAX; op++)
4755 build_ins(ctx, (BCOp)op, op);
4760 /* Emit pseudo frame-info for all assembler functions. */
4761 static void emit_asm_debug(BuildCtx *ctx)
4763 int fcofs = (int)((uint8_t *)ctx->glob[GLOB_vm_ffi_call] - ctx->code);
4765 switch (ctx->mode) {
4767 fprintf(ctx->fp, "\t.section .debug_frame,\"\",@progbits\n");
4770 "\t.long .LECIE0-.LSCIE0\n"
4772 "\t.long 0xffffffff\n"
4778 "\t.byte 0xc\n\t.uleb128 1\n\t.uleb128 0\n"
4783 "\t.long .LEFDE0-.LASFDE0\n"
4785 "\t.long .Lframe0\n"
4788 "\t.byte 0xe\n\t.uleb128 %d\n"
4789 "\t.byte 0x11\n\t.uleb128 65\n\t.sleb128 -1\n"
4790 "\t.byte 0x5\n\t.uleb128 70\n\t.uleb128 55\n",
4791 fcofs, CFRAME_SIZE);
4792 for (i = 14; i <= 31; i++)
4794 "\t.byte %d\n\t.uleb128 %d\n"
4795 "\t.byte %d\n\t.uleb128 %d\n",
4796 0x80+i, 37+(31-i), 0x80+32+i, 2+2*(31-i));
4803 "\t.long .LEFDE1-.LASFDE1\n"
4805 "\t.long .Lframe0\n"
4806 "\t.long lj_vm_ffi_call\n"
4808 "\t.byte 0x11\n\t.uleb128 65\n\t.sleb128 -1\n"
4809 "\t.byte 0x8e\n\t.uleb128 2\n"
4810 "\t.byte 0xd\n\t.uleb128 0xe\n"
4812 ".LEFDE1:\n\n", (int)ctx->codesz - fcofs);
4814 fprintf(ctx->fp, "\t.section .eh_frame,\"a\",@progbits\n");
4817 "\t.long .LECIE1-.LSCIE1\n"
4821 "\t.string \"zPR\"\n"
4825 "\t.uleb128 6\n" /* augmentation length */
4826 "\t.byte 0x1b\n" /* pcrel|sdata4 */
4827 "\t.long lj_err_unwind_dwarf-.\n"
4828 "\t.byte 0x1b\n" /* pcrel|sdata4 */
4829 "\t.byte 0xc\n\t.uleb128 1\n\t.uleb128 0\n"
4834 "\t.long .LEFDE2-.LASFDE2\n"
4836 "\t.long .LASFDE2-.Lframe1\n"
4837 "\t.long .Lbegin-.\n"
4839 "\t.uleb128 0\n" /* augmentation length */
4840 "\t.byte 0xe\n\t.uleb128 %d\n"
4841 "\t.byte 0x11\n\t.uleb128 65\n\t.sleb128 -1\n"
4842 "\t.byte 0x5\n\t.uleb128 70\n\t.uleb128 55\n",
4843 fcofs, CFRAME_SIZE);
4844 for (i = 14; i <= 31; i++)
4846 "\t.byte %d\n\t.uleb128 %d\n"
4847 "\t.byte %d\n\t.uleb128 %d\n",
4848 0x80+i, 37+(31-i), 0x80+32+i, 2+2*(31-i));
4855 "\t.long .LECIE2-.LSCIE2\n"
4859 "\t.string \"zR\"\n"
4863 "\t.uleb128 1\n" /* augmentation length */
4864 "\t.byte 0x1b\n" /* pcrel|sdata4 */
4865 "\t.byte 0xc\n\t.uleb128 1\n\t.uleb128 0\n"
4870 "\t.long .LEFDE3-.LASFDE3\n"
4872 "\t.long .LASFDE3-.Lframe2\n"
4873 "\t.long lj_vm_ffi_call-.\n"
4875 "\t.uleb128 0\n" /* augmentation length */
4876 "\t.byte 0x11\n\t.uleb128 65\n\t.sleb128 -1\n"
4877 "\t.byte 0x8e\n\t.uleb128 2\n"
4878 "\t.byte 0xd\n\t.uleb128 0xe\n"
4880 ".LEFDE3:\n\n", (int)ctx->codesz - fcofs);