1 |// Low-level VM code for PowerPC CPUs.
2 |// Bytecode interpreter, fast functions and helper functions.
3 |// Copyright (C) 2005-2011 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; save_ 17; save_ 18; save_ 19
103 | save_ 20; save_ 21; save_ 22; save_ 23; save_ 24; save_ 25
104 | stw r0, SAVE_LR; stw r12, SAVE_CR
105 | save_ 26; save_ 27; save_ 28; save_ 29; save_ 30; save_ 31
109 | lwz r0, SAVE_LR; lwz r12, SAVE_CR
110 | rest_ 14; rest_ 15; rest_ 16; rest_ 17; rest_ 18; rest_ 19
111 | mtlr r0; mtcrf 0x38, r12
112 | rest_ 20; rest_ 21; rest_ 22; rest_ 23; rest_ 24; rest_ 25
113 | rest_ 26; rest_ 27; rest_ 28; rest_ 29; rest_ 30; rest_ 31
114 | addi sp, sp, CFRAME_SPACE
117 |// Type definitions. Some of these are only used for documentation.
118 |.type L, lua_State, LREG
119 |.type GL, global_State
120 |.type TVALUE, TValue
124 |.type LFUNC, GCfuncL
125 |.type CFUNC, GCfuncC
126 |.type PROTO, GCproto
127 |.type UPVAL, GCupval
130 |.type TRACE, GCtrace
132 |//-----------------------------------------------------------------------
134 |// These basic macros should really be part of DynASM.
135 |.macro srwi, rx, ry, n; rlwinm rx, ry, 32-n, n, 31; .endmacro
136 |.macro slwi, rx, ry, n; rlwinm rx, ry, n, 0, 31-n; .endmacro
137 |.macro rotlwi, rx, ry, n; rlwinm rx, ry, n, 0, 31; .endmacro
138 |.macro rotlw, rx, ry, rn; rlwnm rx, ry, rn, 0, 31; .endmacro
139 |.macro subi, rx, ry, i; addi rx, ry, -i; .endmacro
141 |// Trap for not-yet-implemented parts.
142 |.macro NYI; tw 4, sp, sp; .endmacro
144 |// int/FP conversions.
145 |.macro tonum_i, freg, reg
146 | xoris reg, reg, 0x8000
149 | fsub freg, freg, TONUM
152 |.macro tonum_u, freg, reg
155 | fsub freg, freg, TOBIT
158 |.macro toint, reg, freg, tmpfreg
159 | fctiwz tmpfreg, freg
164 |.macro toint, reg, freg
165 | toint reg, freg, freg
168 |//-----------------------------------------------------------------------
170 |// Access to frame relative to BASE.
171 |.define FRAME_PC, -8
172 |.define FRAME_FUNC, -4
174 |// Instruction decode.
175 |.macro decode_OP4, dst, ins; rlwinm dst, ins, 2, 22, 29; .endmacro
176 |.macro decode_RA8, dst, ins; rlwinm dst, ins, 27, 21, 28; .endmacro
177 |.macro decode_RB8, dst, ins; rlwinm dst, ins, 11, 21, 28; .endmacro
178 |.macro decode_RC8, dst, ins; rlwinm dst, ins, 19, 21, 28; .endmacro
179 |.macro decode_RD8, dst, ins; rlwinm dst, ins, 19, 13, 28; .endmacro
181 |.macro decode_OP1, dst, ins; rlwinm dst, ins, 0, 24, 31; .endmacro
182 |.macro decode_RD4, dst, ins; rlwinm dst, ins, 18, 14, 29; .endmacro
184 |// Instruction fetch.
189 |// Instruction decode+dispatch. Note: optimized for e300!
191 | decode_OP4 TMP1, INS
192 | lwzx TMP0, DISPATCH, TMP1
205 |// Instruction footer.
207 | // Replicated dispatch. Less unpredictable branches, but higher I-Cache use.
208 | .define ins_next, ins_NEXT
209 | .define ins_next_, ins_NEXT
210 | .define ins_next1, ins_NEXT1
211 | .define ins_next2, ins_NEXT2
213 | // Common dispatch. Lower I-Cache use, only one (very) unpredictable branch.
214 | // Affects only certain kinds of benchmarks (and only with -j off).
229 |// Call decode and dispatch.
231 | // BASE = new base, RB = LFUNC/CFUNC, RC = nargs*8, FRAME_PC(BASE) = PC
232 | lwz PC, LFUNC:RB->pc
235 | decode_OP4 TMP1, INS
237 | lwzx TMP0, DISPATCH, TMP1
244 | // BASE = new base, RB = LFUNC/CFUNC, RC = nargs*8, PC = caller PC
245 | stw PC, FRAME_PC(BASE)
249 |//-----------------------------------------------------------------------
251 |// Macros to test operand types.
252 |.macro checknum, reg; cmplw reg, TISNUM; .endmacro
253 |.macro checknum, cr, reg; cmplw cr, reg, TISNUM; .endmacro
254 |.macro checkstr, reg; cmpwi reg, LJ_TSTR; .endmacro
255 |.macro checktab, reg; cmpwi reg, LJ_TTAB; .endmacro
256 |.macro checkfunc, reg; cmpwi reg, LJ_TFUNC; .endmacro
257 |.macro checknil, reg; cmpwi reg, LJ_TNIL; .endmacro
261 | addis PC, PC, -(BCBIAS_J*4 >> 16)
265 |// Assumes DISPATCH is relative to GL.
266 #define DISPATCH_GL(field) (GG_DISP2G + (int)offsetof(global_State, field))
267 #define DISPATCH_J(field) (GG_DISP2J + (int)offsetof(jit_State, field))
269 #define PC2PROTO(field) ((int)offsetof(GCproto, field)-(int)sizeof(GCproto))
271 |.macro hotcheck, delta, target
272 | rlwinm TMP1, PC, 31, 25, 30
273 | addi TMP1, TMP1, GG_DISP2HOT
274 | lhzx TMP2, DISPATCH, TMP1
275 | addic. TMP2, TMP2, -delta
276 | sthx TMP2, DISPATCH, TMP1
281 | hotcheck HOTCOUNT_LOOP, ->vm_hotloop
285 | hotcheck HOTCOUNT_CALL, ->vm_hotcall
288 |// Set current VM state. Uses TMP0.
289 |.macro li_vmstate, st; li TMP0, ~LJ_VMST_..st; .endmacro
290 |.macro st_vmstate; stw TMP0, DISPATCH_GL(vmstate)(DISPATCH); .endmacro
292 |// Move table write barrier back. Overwrites mark and tmp.
293 |.macro barrierback, tab, mark, tmp
294 | lwz tmp, DISPATCH_GL(gc.grayagain)(DISPATCH)
295 | // Assumes LJ_GC_BLACK is 0x04.
296 | rlwinm mark, mark, 0, 30, 28 // black2gray(tab)
297 | stw tab, DISPATCH_GL(gc.grayagain)(DISPATCH)
298 | stb mark, tab->marked
299 | stw tmp, tab->gclist
302 |//-----------------------------------------------------------------------
304 /* Generate subroutines used by opcodes and other parts of the VM. */
305 /* The .code_sub section should be last to help static branch prediction. */
306 static void build_subroutines(BuildCtx *ctx)
310 |//-----------------------------------------------------------------------
311 |//-- Return handling ----------------------------------------------------
312 |//-----------------------------------------------------------------------
315 | // See vm_return. Also: TMP2 = previous base.
316 | andi. TMP0, PC, FRAME_P
318 | beq ->cont_dispatch
320 | // Return from pcall or xpcall fast func.
321 | lwz PC, FRAME_PC(TMP2) // Fetch PC of previous frame.
322 | mr BASE, TMP2 // Restore caller base.
323 | // Prepending may overwrite the pcall frame, so do it at the end.
324 | stwu TMP1, FRAME_PC(RA) // Prepend true to results.
327 | andi. TMP0, PC, FRAME_TYPE
328 | addi RD, RD, 8 // RD = (nresults+1)*8.
330 | beq ->BC_RET_Z // Handle regular return to Lua.
333 | // BASE = base, RA = resultptr, RD/MULTRES = (nresults+1)*8, PC = return
334 | // TMP0 = PC & FRAME_TYPE
335 | cmpwi TMP0, FRAME_C
336 | rlwinm TMP2, PC, 0, 0, 28
338 | sub TMP2, BASE, TMP2 // TMP2 = previous base.
341 | addic. TMP1, RD, -8
343 | lwz TMP2, SAVE_NRES
349 | addic. TMP1, TMP1, -8
357 | cmpw TMP2, RD // More/less results wanted?
360 | stw BASE, L->top // Store new top.
363 | lwz TMP0, SAVE_CFRAME // Restore previous C frame.
364 | li CRET1, 0 // Ok return status for vm_pcall.
365 | stw TMP0, L->cframe
372 | ble >7 // Less results wanted?
373 | // More results wanted. Check stack size and fill up results with nil.
374 | lwz TMP1, L->maxstack
377 | stw TISNIL, 0(BASE)
382 |7: // Less results wanted.
383 | subfic TMP3, TMP2, 0 // LUA_MULTRET+1 case?
385 | subfe TMP1, TMP1, TMP1 // TMP1 = TMP2 == 0 ? 0 : -1
386 | and TMP0, TMP0, TMP1
387 | sub BASE, BASE, TMP0 // Either keep top or shrink it.
390 |8: // Corner case: need to grow stack for filling up results.
391 | // This can happen if:
392 | // - A C function grows the stack (a lot).
393 | // - The GC shrinks the stack in between.
394 | // - A return back from a lua_call() with (high) nresults adjustment.
395 | stw BASE, L->top // Save current top held in BASE (yes).
399 | bl extern lj_state_growstack // (lua_State *L, int n)
400 | lwz TMP2, SAVE_NRES
403 | lwz BASE, L->top // Need the (realloced) L->top in BASE.
406 |->vm_unwind_c: // Unwind C stack, return from vm_pcall.
407 | // (void *cframe, int errcode)
410 |->vm_unwind_c_eh: // Landing pad for external unwinder.
412 | li TMP0, ~LJ_VMST_C
413 | lwz GL:TMP1, L->glref
414 | stw TMP0, GL:TMP1->vmstate
417 |->vm_unwind_ff: // Unwind C stack, return from ff pcall.
419 | rlwinm sp, CARG1, 0, 0, 29
420 |->vm_unwind_ff_eh: // Landing pad for external unwinder.
422 | li TISNUM, LJ_TISNUM // Setup type comparison constants.
424 | lus TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float).
425 | lwz DISPATCH, L->glref // Setup pointer to dispatch table.
429 | ori TMP3, TMP3, 0x0004 // TONUM = 2^52 + 2^51 + 2^31 (float).
433 | lwz PC, FRAME_PC(BASE) // Fetch PC of previous frame.
434 | la RA, -8(BASE) // Results start at BASE-8.
436 | addi DISPATCH, DISPATCH, GG_G2DISP
437 | stw TMP1, 0(RA) // Prepend false to error message.
438 | li RD, 16 // 2 results: false + error message.
443 |//-----------------------------------------------------------------------
444 |//-- Grow stack for calls -----------------------------------------------
445 |//-----------------------------------------------------------------------
447 |->vm_growstack_c: // Grow stack for C function.
448 | li CARG2, LUA_MINSTACK
451 |->vm_growstack_l: // Grow stack for Lua function.
452 | // BASE = new base, RA = BASE+framesize*8, RC = nargs*8, PC = first PC
456 | addi PC, PC, 4 // Must point after first instruction.
460 | // L->base = new base, L->top = top
463 | bl extern lj_state_growstack // (lua_State *L, int n)
466 | lwz LFUNC:RB, FRAME_FUNC(BASE)
468 | // BASE = new base, RB = LFUNC/CFUNC, RC = nargs*8, FRAME_PC(BASE) = PC
469 | ins_callt // Just retry the call.
471 |//-----------------------------------------------------------------------
472 |//-- Entry points into the assembler VM ---------------------------------
473 |//-----------------------------------------------------------------------
475 |->vm_resume: // Setup C frame and resume thread.
476 | // (lua_State *L, TValue *base, int nres1 = 0, ptrdiff_t ef = 0)
479 | lwz DISPATCH, L->glref // Setup pointer to dispatch table.
481 | lbz TMP1, L->status
484 | addi TMP0, sp, CFRAME_RESUME
485 | addi DISPATCH, DISPATCH, GG_G2DISP
486 | stw CARG3, SAVE_NRES
488 | stw CARG3, SAVE_ERRF
489 | stw TMP0, L->cframe
490 | stw CARG3, SAVE_CFRAME
491 | stw CARG1, SAVE_PC // Any value outside of bytecode is ok.
494 | // Resume after yield (like a return).
497 | li TISNUM, LJ_TISNUM // Setup type comparison constants.
499 | lwz PC, FRAME_PC(BASE)
500 | lus TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float).
502 | stb CARG3, L->status
504 | andi. TMP0, PC, FRAME_TYPE
505 | ori TMP3, TMP3, 0x0004 // TONUM = 2^52 + 2^51 + 2^31 (float).
510 | lus TMP0, 0x4338 // Hiword of 2^52 + 2^51 (double)
520 |->vm_pcall: // Setup protected C frame and enter VM.
521 | // (lua_State *L, TValue *base, int nres1, ptrdiff_t ef)
524 | stw CARG4, SAVE_ERRF
527 |->vm_call: // Setup C frame and enter VM.
528 | // (lua_State *L, TValue *base, int nres1)
532 |1: // Entry point for vm_pcall above (PC = ftype).
533 | lwz TMP1, L:CARG1->cframe
534 | stw CARG3, SAVE_NRES
538 | stw sp, L->cframe // Add our C frame to cframe chain.
539 | lwz DISPATCH, L->glref // Setup pointer to dispatch table.
540 | stw CARG1, SAVE_PC // Any value outside of bytecode is ok.
541 | stw TMP1, SAVE_CFRAME
542 | addi DISPATCH, DISPATCH, GG_G2DISP
544 |3: // Entry point for vm_cpcall/vm_resume (BASE = base, PC = ftype).
545 | lwz TMP2, L->base // TMP2 = old base (used in vmeta_call).
546 | li TISNUM, LJ_TISNUM // Setup type comparison constants.
548 | lus TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float).
552 | ori TMP3, TMP3, 0x0004 // TONUM = 2^52 + 2^51 + 2^31 (float).
554 | sub PC, PC, TMP2 // PC = frame delta + frame type
556 | lus TMP0, 0x4338 // Hiword of 2^52 + 2^51 (double)
557 | sub NARGS8:RC, TMP1, BASE
565 | // TMP2 = old base, BASE = new base, RC = nargs*8, PC = caller PC
566 | lwz TMP0, FRAME_PC(BASE)
567 | lwz LFUNC:RB, FRAME_FUNC(BASE)
568 | checkfunc TMP0; bne ->vmeta_call
570 |->vm_call_dispatch_f:
572 | // BASE = new base, RB = func, RC = nargs*8, PC = caller PC
574 |->vm_cpcall: // Setup protected C frame, call C.
575 | // (lua_State *L, lua_CFunction func, void *ud, lua_CPFunction cp)
578 | lwz TMP0, L:CARG1->stack
581 | stw CARG1, SAVE_PC // Any value outside of bytecode is ok.
582 | sub TMP0, TMP0, TMP1 // Compute -savestack(L, L->top).
583 | lwz TMP1, L->cframe
584 | stw sp, L->cframe // Add our C frame to cframe chain.
586 | stw TMP0, SAVE_NRES // Neg. delta means cframe w/o frame.
587 | stw TMP2, SAVE_ERRF // No error function.
588 | stw TMP1, SAVE_CFRAME
590 | bctrl // (lua_State *L, lua_CFunction func, void *ud)
592 | lwz DISPATCH, L->glref // Setup pointer to dispatch table.
594 | addi DISPATCH, DISPATCH, GG_G2DISP
595 | bne <3 // Else continue with the call.
596 | b ->vm_leave_cp // No base? Just remove C frame.
598 |//-----------------------------------------------------------------------
599 |//-- Metamethod handling ------------------------------------------------
600 |//-----------------------------------------------------------------------
602 |// The lj_meta_* functions (except for lj_meta_cat) don't reallocate the
603 |// stack, so BASE doesn't need to be reloaded across these calls.
605 |//-- Continuation dispatch ----------------------------------------------
608 | // BASE = meta base, RA = resultptr, RD = (nresults+1)*8
609 | lwz TMP0, -12(BASE) // Continuation.
611 | mr BASE, TMP2 // Restore caller BASE.
612 | lwz LFUNC:TMP1, FRAME_FUNC(TMP2)
614 | lwz PC, -16(RB) // Restore PC from [cont|PC].
617 | lwz TMP1, LFUNC:TMP1->pc
618 | stwx TISNIL, RA, TMP2 // Ensure one valid arg.
619 | lwz KBASE, PC2PROTO(k)(TMP1)
620 | // BASE = base, RA = resultptr, RB = meta base
622 | bctr // Jump to continuation.
624 |1: // Tail call from C function.
629 |->cont_cat: // RA = resultptr, RB = meta base
632 | decode_RB8 SAVE0, INS
634 | add TMP1, BASE, SAVE0
637 | sub CARG3, CARG2, TMP1
644 |//-- Table indexing metamethods -----------------------------------------
647 | la CARG3, DISPATCH_GL(tmptv)(DISPATCH)
650 | stw STR:RC, 4(CARG3)
651 | add CARG2, BASE, RB
656 | la CARG2, DISPATCH_GL(tmptv)(DISPATCH)
658 | stw TAB:RB, 4(CARG2)
659 | la CARG3, DISPATCH_GL(tmptv2)(DISPATCH)
662 | stw STR:RC, 4(CARG3)
666 |->vmeta_tgetb: // TMP0 = index
671 | la CARG3, DISPATCH_GL(tmptv)(DISPATCH)
672 | add CARG2, BASE, RB
674 | stw TISNUM, 0(CARG3)
684 | add CARG2, BASE, RB
685 | add CARG3, BASE, RC
690 | bl extern lj_meta_tget // (lua_State *L, TValue *o, TValue *k)
691 | // Returns TValue * (finished) or NULL (metamethod).
699 |3: // Call __index metamethod.
700 | // BASE = base, L->top = new base, stack = cont/func/t/k
701 | subfic TMP1, BASE, FRAME_CONT
703 | stw PC, -16(BASE) // [cont|PC]
705 | lwz LFUNC:RB, FRAME_FUNC(BASE) // Guaranteed to be a function here.
706 | li NARGS8:RC, 16 // 2 args for func(t, k).
707 | b ->vm_call_dispatch_f
709 |//-----------------------------------------------------------------------
712 | la CARG3, DISPATCH_GL(tmptv)(DISPATCH)
715 | stw STR:RC, 4(CARG3)
716 | add CARG2, BASE, RB
721 | la CARG2, DISPATCH_GL(tmptv)(DISPATCH)
723 | stw TAB:RB, 4(CARG2)
724 | la CARG3, DISPATCH_GL(tmptv2)(DISPATCH)
727 | stw STR:RC, 4(CARG3)
731 |->vmeta_tsetb: // TMP0 = index
736 | la CARG3, DISPATCH_GL(tmptv)(DISPATCH)
737 | add CARG2, BASE, RB
739 | stw TISNUM, 0(CARG3)
749 | add CARG2, BASE, RB
750 | add CARG3, BASE, RC
755 | bl extern lj_meta_tset // (lua_State *L, TValue *o, TValue *k)
756 | // Returns TValue * (finished) or NULL (metamethod).
760 | // NOBARRIER: lj_meta_tset ensures the table is not black.
765 |3: // Call __newindex metamethod.
766 | // BASE = base, L->top = new base, stack = cont/func/t/k/(v)
767 | subfic TMP1, BASE, FRAME_CONT
769 | stw PC, -16(BASE) // [cont|PC]
771 | lwz LFUNC:RB, FRAME_FUNC(BASE) // Guaranteed to be a function here.
772 | li NARGS8:RC, 24 // 3 args for func(t, k, v)
773 | stfd f0, 16(BASE) // Copy value to third argument.
774 | b ->vm_call_dispatch_f
776 |//-- Comparison metamethods ---------------------------------------------
784 | add CARG2, BASE, RA
790 | add CARG3, BASE, RD
793 | decode_OP1 CARG4, INS
794 | bl extern lj_meta_comp // (lua_State *L, TValue *o1, *o2, int op)
795 | // Returns 0/1 or TValue * (metamethod).
799 | subfic CRET1, CRET1, 0
803 | decode_RD4 TMP2, INS
804 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
805 | and TMP2, TMP2, CRET1
810 |->cont_ra: // RA = resultptr
813 | decode_RA8 TMP1, INS
814 | stfdx f0, BASE, TMP1
817 |->cont_condt: // RA = resultptr
819 | subfic TMP0, TMP0, LJ_TTRUE // Branch if result is true.
820 | subfe CRET1, CRET1, CRET1
824 |->cont_condf: // RA = resultptr
826 | subfic TMP0, TMP0, LJ_TTRUE // Branch if result is false.
827 | subfe CRET1, CRET1, CRET1
831 | // CARG2, CARG3, CARG4 are already set by BC_ISEQV/BC_ISNEV.
836 | bl extern lj_meta_equal // (lua_State *L, GCobj *o1, *o2, int ne)
837 | // Returns 0/1 or TValue * (metamethod).
847 | bl extern lj_meta_equal_cd // (lua_State *L, BCIns op)
848 | // Returns 0/1 or TValue * (metamethod).
852 |//-- Arithmetic metamethods ---------------------------------------------
855 | add CARG3, KBASE, RC
856 | add CARG4, BASE, RB
871 | add CARG3, BASE, RB
872 | add CARG4, KBASE, RC
876 | add CARG3, BASE, RB
877 | add CARG4, BASE, RC
888 | add CARG2, BASE, RA
892 | decode_OP1 CARG5, INS // Caveat: CARG5 overlaps INS.
893 | bl extern lj_meta_arith // (lua_State *L, TValue *ra,*rb,*rc, BCReg op)
894 | // Returns NULL (finished) or TValue * (metamethod).
898 | // Call metamethod for binary op.
900 | // BASE = old base, CRET1 = new base, stack = cont/func/o1/o2
901 | sub TMP1, CRET1, BASE
902 | stw PC, -16(CRET1) // [cont|PC]
904 | addi PC, TMP1, FRAME_CONT
906 | li NARGS8:RC, 16 // 2 args for func(o1, o2).
907 | b ->vm_call_dispatch
910 #ifdef LUAJIT_ENABLE_LUA52COMPAT
917 | bl extern lj_meta_len // (lua_State *L, TValue *o)
918 | // Returns NULL (retry) or TValue * (metamethod base).
919 #ifdef LUAJIT_ENABLE_LUA52COMPAT
921 | bne ->vmeta_binop // Binop call for compatibility.
925 | b ->vmeta_binop // Binop call for compatibility.
928 |//-- Call metamethod ----------------------------------------------------
930 |->vmeta_call: // Resolve and call __call metamethod.
931 | // TMP2 = old base, BASE = new base, RC = nargs*8
933 | stw TMP2, L->base // This is the callers base!
934 | subi CARG2, BASE, 8
936 | add CARG3, BASE, RC
937 | mr SAVE0, NARGS8:RC
938 | bl extern lj_meta_call // (lua_State *L, TValue *func, TValue *top)
939 | lwz LFUNC:RB, FRAME_FUNC(BASE) // Guaranteed to be a function here.
940 | addi NARGS8:RC, SAVE0, 8 // Got one more argument now.
943 |->vmeta_callt: // Resolve __call for BC_CALLT.
944 | // BASE = old base, RA = new base, RC = nargs*8
950 | mr SAVE0, NARGS8:RC
951 | bl extern lj_meta_call // (lua_State *L, TValue *func, TValue *top)
952 | lwz TMP1, FRAME_PC(BASE)
953 | addi NARGS8:RC, SAVE0, 8 // Got one more argument now.
954 | lwz LFUNC:RB, FRAME_FUNC(RA) // Guaranteed to be a function here.
957 |//-- Argument coercion for 'for' statement ------------------------------
965 | bl extern lj_meta_for // (lua_State *L, TValue *base)
967 | decode_OP1 TMP0, SAVE0
969 | decode_RA8 RA, SAVE0
971 | cmpwi TMP0, BC_JFORI
973 | decode_RD8 RD, SAVE0
979 |//-----------------------------------------------------------------------
980 |//-- Fast functions -----------------------------------------------------
981 |//-----------------------------------------------------------------------
987 |.macro .ffunc_1, name
989 | cmplwi NARGS8:RC, 8
995 |.macro .ffunc_2, name
997 | cmplwi NARGS8:RC, 16
1000 | lwz CARG1, 4(BASE)
1001 | lwz CARG2, 12(BASE)
1002 | blt ->fff_fallback
1005 |.macro .ffunc_n, name
1007 | cmplwi NARGS8:RC, 8
1008 | lwz CARG3, 0(BASE)
1009 | lfd FARG1, 0(BASE)
1010 | blt ->fff_fallback
1011 | checknum CARG3; bge ->fff_fallback
1014 |.macro .ffunc_nn, name
1016 | cmplwi NARGS8:RC, 16
1017 | lwz CARG3, 0(BASE)
1018 | lfd FARG1, 0(BASE)
1019 | lwz CARG4, 8(BASE)
1020 | lfd FARG2, 8(BASE)
1021 | blt ->fff_fallback
1022 | checknum CARG3; bge ->fff_fallback
1023 | checknum CARG4; bge ->fff_fallback
1026 |// Inlined GC threshold check. Caveat: uses TMP0 and TMP1.
1028 | lwz TMP0, DISPATCH_GL(gc.total)(DISPATCH)
1029 | lwz TMP1, DISPATCH_GL(gc.threshold)(DISPATCH)
1034 |//-- Base library: checks -----------------------------------------------
1037 | li TMP1, LJ_TFALSE
1039 | cmplw cr1, CARG3, TMP1
1040 | lwz PC, FRAME_PC(BASE)
1041 | bge cr1, ->fff_fallback
1043 | addi RD, NARGS8:RC, 8 // Compute (nresults+1)*8.
1045 | beq ->fff_res // Done if exactly 1 argument.
1050 | lfdx f0, BASE, TMP1
1051 | stfdx f0, RA, TMP1
1052 | addi TMP1, TMP1, 8
1057 | cmplwi NARGS8:RC, 8
1058 | lwz CARG1, 0(BASE)
1059 | blt ->fff_fallback
1060 | subfc TMP0, TISNUM, CARG1
1061 | subfe TMP2, CARG1, CARG1
1062 | orc TMP1, TMP2, TMP0
1063 | addi TMP1, TMP1, ~LJ_TISNUM+1
1064 | slwi TMP1, TMP1, 3
1065 | la TMP2, CFUNC:RB->upvalue
1066 | lfdx FARG1, TMP2, TMP1
1069 |//-- Base library: getters and setters ---------------------------------
1071 |.ffunc_1 getmetatable
1072 | checktab CARG3; bne >6
1073 |1: // Field metatable must be at same offset for GCtab and GCudata!
1074 | lwz TAB:CARG1, TAB:CARG1->metatable
1077 | cmplwi TAB:CARG1, 0
1078 | lwz STR:RC, DISPATCH_GL(gcroot[GCROOT_MMNAME+MM_metatable])(DISPATCH)
1080 | lwz TMP0, TAB:CARG1->hmask
1081 | li CARG3, LJ_TTAB // Use metatable as default result.
1082 | lwz TMP1, STR:RC->hash
1083 | lwz NODE:TMP2, TAB:CARG1->node
1084 | and TMP1, TMP1, TMP0 // idx = str->hash & tab->hmask
1085 | slwi TMP0, TMP1, 5
1086 | slwi TMP1, TMP1, 3
1087 | sub TMP1, TMP0, TMP1
1088 | add NODE:TMP2, NODE:TMP2, TMP1 // node = tab->node + (idx*32-idx*8)
1089 |3: // Rearranged logic, because we expect _not_ to find the key.
1090 | lwz CARG4, NODE:TMP2->key
1091 | lwz TMP0, 4+offsetof(Node, key)(NODE:TMP2)
1092 | lwz CARG2, NODE:TMP2->val
1093 | lwz TMP1, 4+offsetof(Node, val)(NODE:TMP2)
1094 | checkstr CARG4; bne >4
1095 | cmpw TMP0, STR:RC; beq >5
1097 | lwz NODE:TMP2, NODE:TMP2->next
1098 | cmplwi NODE:TMP2, 0
1099 | beq ->fff_restv // Not found, keep default result.
1103 | beq ->fff_restv // Ditto for nil value.
1104 | mr CARG3, CARG2 // Return value of mt.__metatable.
1109 | cmpwi CARG3, LJ_TUDATA; beq <1
1110 | subfc TMP0, TISNUM, CARG3
1111 | subfe TMP2, CARG3, CARG3
1112 | orc TMP1, TMP2, TMP0
1113 | addi TMP1, TMP1, ~LJ_TISNUM+1
1114 | slwi TMP1, TMP1, 2
1115 | la TMP2, DISPATCH_GL(gcroot[GCROOT_BASEMT])(DISPATCH)
1116 | lwzx TAB:CARG1, TMP2, TMP1
1119 |.ffunc_2 setmetatable
1120 | // Fast path: no mt for table yet and not clearing the mt.
1121 | checktab CARG3; bne ->fff_fallback
1122 | lwz TAB:TMP1, TAB:CARG1->metatable
1123 | checktab CARG4; bne ->fff_fallback
1124 | cmplwi TAB:TMP1, 0
1125 | lbz TMP3, TAB:CARG1->marked
1126 | bne ->fff_fallback
1127 | andi. TMP0, TMP3, LJ_GC_BLACK // isblack(table)
1128 | stw TAB:CARG2, TAB:CARG1->metatable
1130 | barrierback TAB:CARG1, TMP3, TMP0
1134 | cmplwi NARGS8:RC, 8
1135 | lwz CARG4, 0(BASE)
1136 | lwz TAB:CARG2, 4(BASE)
1137 | blt ->fff_fallback
1138 | checktab CARG4; bne ->fff_fallback
1141 | bl extern lj_tab_get // (lua_State *L, GCtab *t, cTValue *key)
1142 | // Returns cTValue *.
1143 | lfd FARG1, 0(CRET1)
1146 |//-- Base library: conversions ------------------------------------------
1149 | // Only handles the number case inline (without a base argument).
1150 | cmplwi NARGS8:RC, 8
1151 | lwz CARG1, 0(BASE)
1152 | lfd FARG1, 0(BASE)
1153 | bne ->fff_fallback // Exactly one argument.
1154 | checknum CARG1; bgt ->fff_fallback
1158 | // Only handles the string or number case inline.
1160 | // A __tostring method in the string base metatable is ignored.
1161 | beq ->fff_restv // String key?
1162 | // Handle numbers inline, unless a number base metatable is present.
1163 | lwz TMP0, DISPATCH_GL(gcroot[GCROOT_BASEMT_NUM])(DISPATCH)
1165 | cmplwi cr1, TMP0, 0
1166 | stw BASE, L->base // Add frame since C call can throw.
1167 | crorc 4*cr0+eq, 4*cr0+gt, 4*cr1+eq
1168 | stw PC, SAVE_PC // Redundant (but a defined value).
1169 | beq ->fff_fallback
1174 | bl extern lj_str_fromnumber // (lua_State *L, cTValue *o)
1176 | bl extern lj_str_fromnum // (lua_State *L, lua_Number *np)
1178 | // Returns GCstr *.
1182 |//-- Base library: iterators -------------------------------------------
1185 | cmplwi NARGS8:RC, 8
1186 | lwz CARG1, 0(BASE)
1187 | lwz TAB:CARG2, 4(BASE)
1188 | blt ->fff_fallback
1189 | stwx TISNIL, BASE, NARGS8:RC // Set missing 2nd arg to nil.
1191 | lwz PC, FRAME_PC(BASE)
1192 | bne ->fff_fallback
1193 | stw BASE, L->base // Add frame since C call can throw.
1195 | stw BASE, L->top // Dummy frame length is ok.
1198 | bl extern lj_tab_next // (lua_State *L, GCtab *t, TValue *key)
1199 | // Returns 0 at end of traversal.
1202 | beq ->fff_restv // End of traversal: return nil.
1203 | lfd f0, 8(BASE) // Copy key and value to results.
1213 | lwz PC, FRAME_PC(BASE)
1214 | bne ->fff_fallback
1215 #ifdef LUAJIT_ENABLE_LUA52COMPAT
1216 | lwz TAB:TMP2, TAB:CARG1->metatable
1217 | lfd f0, CFUNC:RB->upvalue[0]
1218 | cmplwi TAB:TMP2, 0
1220 | bne ->fff_fallback
1222 | lfd f0, CFUNC:RB->upvalue[0]
1225 | stw TISNIL, 8(BASE)
1231 | cmplwi NARGS8:RC, 16
1232 | lwz CARG3, 0(BASE)
1233 | lwz TAB:CARG1, 4(BASE)
1234 | lwz CARG4, 8(BASE)
1236 | lwz TMP2, 12(BASE)
1238 | lfd FARG2, 8(BASE)
1240 | blt ->fff_fallback
1242 | checknum cr1, CARG4
1243 | lwz PC, FRAME_PC(BASE)
1245 | bne ->fff_fallback
1246 | bne cr1, ->fff_fallback
1250 | bne ->fff_fallback
1252 | bge cr1, ->fff_fallback
1254 | toint TMP2, FARG2, f0
1256 | lwz TMP0, TAB:CARG1->asize
1257 | lwz TMP1, TAB:CARG1->array
1259 | fadd FARG2, FARG2, FARG1
1261 | addi TMP2, TMP2, 1
1266 | slwi TMP3, TMP2, 3
1269 | slwi TMP3, TMP2, 3
1272 | ble >2 // Not in array part?
1273 | lwzx TMP2, TMP1, TMP3
1274 | lfdx f0, TMP1, TMP3
1278 | beq ->fff_res // End of iteration, return 0 results.
1282 |2: // Check for empty hash part first. Otherwise call C function.
1283 | lwz TMP0, TAB:CARG1->hmask
1288 | bl extern lj_tab_getinth // (GCtab *t, int32_t key)
1289 | // Returns cTValue * or NULL.
1293 | lwz TMP2, 0(CRET1)
1299 | lwz PC, FRAME_PC(BASE)
1300 | bne ->fff_fallback
1301 #ifdef LUAJIT_ENABLE_LUA52COMPAT
1302 | lwz TAB:TMP2, TAB:CARG1->metatable
1303 | lfd f0, CFUNC:RB->upvalue[0]
1304 | cmplwi TAB:TMP2, 0
1306 | bne ->fff_fallback
1308 | lfd f0, CFUNC:RB->upvalue[0]
1312 | stw TISNUM, 8(BASE)
1316 | stw ZERO, 12(BASE)
1321 |//-- Base library: catch errors ----------------------------------------
1324 | cmplwi NARGS8:RC, 8
1325 | lbz TMP3, DISPATCH_GL(hookmask)(DISPATCH)
1326 | blt ->fff_fallback
1329 | // Remember active hook before pcall.
1330 | rlwinm TMP3, TMP3, 32-HOOK_ACTIVE_SHIFT, 31, 31
1331 | subi NARGS8:RC, NARGS8:RC, 8
1332 | addi PC, TMP3, 8+FRAME_PCALL
1333 | b ->vm_call_dispatch
1336 | cmplwi NARGS8:RC, 16
1337 | lwz CARG4, 8(BASE)
1338 | lfd FARG2, 8(BASE)
1339 | lwz CARG3, 0(BASE)
1340 | lfd FARG1, 0(BASE)
1341 | blt ->fff_fallback
1342 | lbz TMP1, DISPATCH_GL(hookmask)(DISPATCH)
1344 | checkfunc CARG4; bne ->fff_fallback // Traceback must be a function.
1346 | // Remember active hook before pcall.
1347 | rlwinm TMP1, TMP1, 32-HOOK_ACTIVE_SHIFT, 31, 31
1348 | stfd FARG2, 0(TMP2) // Swap function and traceback.
1349 | subi NARGS8:RC, NARGS8:RC, 16
1350 | stfd FARG1, 8(TMP2)
1351 | addi PC, TMP1, 16+FRAME_PCALL
1352 | b ->vm_call_dispatch
1354 |//-- Coroutine library --------------------------------------------------
1356 |.macro coroutine_resume_wrap, resume
1358 |.ffunc_1 coroutine_resume
1359 | cmpwi CARG3, LJ_TTHREAD; bne ->fff_fallback
1361 |.ffunc coroutine_wrap_aux
1362 | lwz L:CARG1, CFUNC:RB->upvalue[0].gcr
1364 | lbz TMP0, L:CARG1->status
1365 | lwz TMP1, L:CARG1->cframe
1366 | lwz CARG2, L:CARG1->top
1367 | cmplwi cr0, TMP0, LUA_YIELD
1368 | lwz TMP2, L:CARG1->base
1369 | cmplwi cr1, TMP1, 0
1370 | lwz TMP0, L:CARG1->maxstack
1371 | cmplw cr7, CARG2, TMP2
1372 | lwz PC, FRAME_PC(BASE)
1373 | crorc 4*cr6+lt, 4*cr0+gt, 4*cr1+eq // st>LUA_YIELD || cframe!=0
1374 | add TMP2, CARG2, NARGS8:RC
1375 | crandc 4*cr6+gt, 4*cr7+eq, 4*cr0+eq // base==top && st!=LUA_YIELD
1376 | cmplw cr1, TMP2, TMP0
1377 | cror 4*cr6+lt, 4*cr6+lt, 4*cr6+gt
1379 | cror 4*cr6+lt, 4*cr6+lt, 4*cr1+gt // cond1 || cond2 || stackov
1381 | blt cr6, ->fff_fallback
1384 | addi BASE, BASE, 8 // Keep resumed thread in stack for GC.
1385 | subi NARGS8:RC, NARGS8:RC, 8
1386 | subi TMP2, TMP2, 8
1388 | stw TMP2, L:CARG1->top
1391 |2: // Move args to coroutine.
1392 | cmpw TMP1, NARGS8:RC
1393 | lfdx f0, BASE, TMP1
1395 | stfdx f0, CARG2, TMP1
1396 | addi TMP1, TMP1, 8
1400 | mr L:SAVE0, L:CARG1
1402 | bl ->vm_resume // (lua_State *L, TValue *base, 0, 0)
1403 | // Returns thread status.
1405 | lwz TMP2, L:SAVE0->base
1406 | cmplwi CRET1, LUA_YIELD
1407 | lwz TMP3, L:SAVE0->top
1412 | sub RD, TMP3, TMP2
1413 | lwz TMP0, L->maxstack
1415 | add TMP1, BASE, RD
1416 | beq >6 // No results?
1419 | bgt >9 // Need to grow stack?
1422 | stw TMP2, L:SAVE0->top // Clear coroutine stack.
1423 |5: // Move results from coroutine.
1425 | lfdx f0, TMP2, TMP1
1426 | stfdx f0, BASE, TMP1
1427 | addi TMP1, TMP1, 8
1430 | andi. TMP0, PC, FRAME_TYPE
1434 | stw TMP1, -8(BASE) // Prepend true to results.
1446 |8: // Coroutine returned with error (at co->top-1).
1448 | andi. TMP0, PC, FRAME_TYPE
1450 | li TMP1, LJ_TFALSE
1452 | stw TMP3, L:SAVE0->top // Remove error from coroutine stack.
1454 | stw TMP1, -8(BASE) // Prepend false to results.
1456 | stfd f0, 0(BASE) // Copy error message.
1461 | bl extern lj_ffh_coroutine_wrap_err // (lua_State *L, lua_State *co)
1464 |9: // Handle stack expansion on return from yield.
1467 | bl extern lj_state_growstack // (lua_State *L, int n)
1472 | coroutine_resume_wrap 1 // coroutine.resume
1473 | coroutine_resume_wrap 0 // coroutine.wrap
1475 |.ffunc coroutine_yield
1476 | lwz TMP0, L->cframe
1477 | add TMP1, BASE, NARGS8:RC
1479 | andi. TMP0, TMP0, CFRAME_RESUME
1481 | li CRET1, LUA_YIELD
1482 | beq ->fff_fallback
1483 | stw ZERO, L->cframe
1484 | stb CRET1, L->status
1487 |//-- Math library -------------------------------------------------------
1493 | srawi TMP1, CARG1, 31
1494 | xor TMP2, TMP1, CARG1
1495 | sub. CARG1, TMP2, TMP1
1498 | lwz PC, FRAME_PC(BASE)
1500 | stw TISNUM, -8(BASE)
1501 | stw CRET1, -4(BASE)
1504 | lus CARG3, 0x41e0 // 2^31.
1509 | bge ->fff_fallback
1510 | rlwinm CARG3, CARG3, 0, 1, 31
1514 | // CARG3/CARG1 = TValue result.
1515 | lwz PC, FRAME_PC(BASE)
1516 | stw CARG3, -8(BASE)
1518 | stw CARG1, -4(BASE)
1520 | // RA = results, PC = return.
1523 | // RA = results, RD = (nresults+1)*8, PC = return.
1524 | andi. TMP0, PC, FRAME_TYPE
1528 | decode_RB8 RB, INS
1530 | cmplw RB, RD // More results expected?
1531 | decode_RA8 TMP0, INS
1534 | // Adjust BASE. KBASE is assumed to be set for the calling frame.
1535 | sub BASE, RA, TMP0
1538 |6: // Fill up results with nil.
1541 | stwx TISNIL, RA, TMP1
1544 |.macro math_extern, func
1545 | .ffunc_n math_ .. func
1550 |.macro math_extern2, func
1551 | .ffunc_nn math_ .. func
1556 |.macro math_round, func
1557 | .ffunc_1 math_ .. func
1558 | checknum CARG3; beqy ->fff_restv
1559 | rlwinm TMP2, CARG3, 12, 21, 31
1560 | bge ->fff_fallback
1561 | addic. TMP2, TMP2, -1023 // exp = exponent(x) - 1023
1562 | cmplwi cr1, TMP2, 31 // 0 <= exp < 31?
1563 | subfic TMP0, TMP2, 31
1565 | slwi TMP1, CARG3, 11
1566 | srwi TMP3, CARG1, 21
1567 | oris TMP1, TMP1, 0x8000
1568 | addi TMP2, TMP2, 1
1569 | or TMP1, TMP1, TMP3
1570 | slwi CARG2, CARG1, 11
1572 | slw TMP3, TMP1, TMP2
1573 | srw CARG1, TMP1, TMP0
1574 | or TMP3, TMP3, CARG2
1575 | srawi TMP2, CARG3, 31
1576 |.if "func" == "floor"
1577 | and TMP1, TMP3, TMP2
1578 | addic TMP0, TMP1, -1
1579 | subfe TMP1, TMP0, TMP1
1580 | add CARG1, CARG1, TMP1
1581 | xor CARG1, CARG1, TMP2
1582 | sub CARG1, CARG1, TMP2
1585 | andc TMP1, TMP3, TMP2
1586 | addic TMP0, TMP1, -1
1587 | subfe TMP1, TMP0, TMP1
1588 | addo. CARG1, CARG1, TMP1
1589 | xor CARG1, CARG1, TMP2
1590 | sub CARG1, CARG1, TMP2
1592 | // Potential overflow.
1593 | mcrxr cr0; bley ->fff_resi // Ignore unrelated overflow.
1594 | lus CARG3, 0x41e0 // 2^31.
1599 | add TMP2, CARG3, CARG3
1600 | srawi TMP1, CARG3, 31
1601 | or TMP2, CARG1, TMP2 // ztest = (hi+hi) | lo
1602 |.if "func" == "floor"
1603 | and TMP1, TMP2, TMP1 // (ztest & sign) == 0 ? 0 : -1
1604 | subfic TMP2, TMP1, 0
1605 | subfe CARG1, CARG1, CARG1
1607 | andc TMP1, TMP2, TMP1 // (ztest & ~sign) == 0 ? 0 : 1
1608 | addic TMP2, TMP1, -1
1609 | subfe CARG1, TMP2, TMP1
1612 |4: // exp >= 31. Check for -(2^31).
1613 | xoris TMP1, TMP1, 0x8000
1614 | srawi TMP2, CARG3, 31
1615 |.if "func" == "floor"
1616 | or TMP1, TMP1, CARG2
1618 | orc. TMP1, TMP1, TMP2
1619 | crand 4*cr0+eq, 4*cr0+eq, 4*cr1+eq
1620 | lus CARG1, 0x8000 // -(2^31).
1623 | lfd FARG1, 0(BASE)
1632 | // NYI: use internal implementation.
1651 | math_extern2 atan2
1656 | lfd FARG2, CFUNC:RB->upvalue[0]
1657 | fmul FARG1, FARG1, FARG2
1662 | cmplwi NARGS8:RC, 16
1663 | lwz CARG3, 0(BASE)
1664 | lfd FARG1, 0(BASE)
1665 | lwz CARG4, 8(BASE)
1666 | lwz CARG1, 12(BASE)
1667 | blt ->fff_fallback
1668 | checknum CARG3; bge ->fff_fallback
1669 | checknum CARG4; bne ->fff_fallback
1671 |.ffunc_nn math_ldexp
1672 | toint CARG1, FARG2
1677 |.ffunc_n math_frexp
1678 | la CARG1, DISPATCH_GL(tmptv)(DISPATCH)
1679 | lwz PC, FRAME_PC(BASE)
1681 | lwz TMP1, DISPATCH_GL(tmptv)(DISPATCH)
1684 | tonum_i FARG2, TMP1
1697 | la CARG1, -8(BASE)
1698 | lwz PC, FRAME_PC(BASE)
1701 | stfd FARG1, 0(BASE)
1705 |.macro math_minmax, name, ismax
1709 | addi TMP1, BASE, 8
1710 | add TMP2, BASE, NARGS8:RC
1712 |1: // Handle integers.
1713 | lwz CARG4, 0(TMP1)
1714 | cmplw cr1, TMP1, TMP2
1715 | lwz CARG2, 4(TMP1)
1716 | bge cr1, ->fff_resi
1718 | xoris TMP0, CARG1, 0x8000
1719 | xoris TMP3, CARG2, 0x8000
1721 | subfc TMP3, TMP3, TMP0
1722 | subfe TMP0, TMP0, TMP0
1724 | andc TMP3, TMP3, TMP0
1726 | and TMP3, TMP3, TMP0
1728 | add CARG1, TMP3, CARG2
1729 | addi TMP1, TMP1, 8
1732 | bge ->fff_fallback
1733 | // Convert intermediate result to number and continue below.
1734 | tonum_i FARG1, CARG1
1735 | lfd FARG2, 0(TMP1)
1738 | lfd FARG1, 0(BASE)
1739 | bge ->fff_fallback
1740 |5: // Handle numbers.
1741 | lwz CARG4, 0(TMP1)
1742 | cmplw cr1, TMP1, TMP2
1743 | lfd FARG2, 0(TMP1)
1744 | bge cr1, ->fff_resn
1745 | checknum CARG4; bge >7
1747 | fsub f0, FARG1, FARG2
1748 | addi TMP1, TMP1, 8
1750 | fsel FARG1, f0, FARG1, FARG2
1752 | fsel FARG1, f0, FARG2, FARG1
1755 |7: // Convert integer to number and continue above.
1756 | lwz CARG2, 4(TMP1)
1757 | bne ->fff_fallback
1758 | tonum_i FARG2, CARG2
1764 | lwzx CARG2, BASE, TMP1
1765 | lfdx FARG2, BASE, TMP1
1766 | cmplw cr1, TMP1, NARGS8:RC
1768 | bge cr1, ->fff_resn
1769 | bge ->fff_fallback
1770 | fsub f0, FARG1, FARG2
1771 | addi TMP1, TMP1, 8
1773 | fsel FARG1, f0, FARG1, FARG2
1775 | fsel FARG1, f0, FARG2, FARG1
1781 | math_minmax math_min, 0
1782 | math_minmax math_max, 1
1784 |//-- String library -----------------------------------------------------
1786 |.ffunc_1 string_len
1787 | checkstr CARG3; bne ->fff_fallback
1788 | lwz CRET1, STR:CARG1->len
1791 |.ffunc string_byte // Only handle the 1-arg case here.
1792 | cmplwi NARGS8:RC, 8
1793 | lwz CARG3, 0(BASE)
1794 | lwz STR:CARG1, 4(BASE)
1795 | bne ->fff_fallback // Need exactly 1 argument.
1797 | bne ->fff_fallback
1798 | lwz TMP0, STR:CARG1->len
1800 | lbz CARG1, STR:CARG1[1] // Access is always ok (NUL at end).
1802 | lwz PC, FRAME_PC(BASE)
1808 | lbz TMP1, STR:CARG1[1] // Access is always ok (NUL at end).
1809 | addic TMP3, TMP0, -1 // RD = ((str->len != 0)+1)*8
1810 | subfe RD, TMP3, TMP0
1811 | stw TMP1, TONUM_LO // Inlined tonum_u f0, TMP1.
1815 | lwz PC, FRAME_PC(BASE)
1816 | fsub f0, f0, TOBIT
1822 |.ffunc string_char // Only handle the 1-arg case here.
1824 | cmplwi NARGS8:RC, 8
1825 | lwz CARG3, 0(BASE)
1828 | bne ->fff_fallback // Exactly 1 argument.
1829 | checknum CARG3; bne ->fff_fallback
1832 | lfd FARG1, 0(BASE)
1833 | bne ->fff_fallback // Exactly 1 argument.
1834 | checknum CARG3; bge ->fff_fallback
1836 | la CARG2, TMPD_BLO
1839 | cmplwi TMP0, 255; bgt ->fff_fallback
1844 | bl extern lj_str_new // (lua_State *L, char *str, size_t l)
1845 | // Returns GCstr *.
1852 | cmplwi NARGS8:RC, 16
1853 | lwz CARG3, 16(BASE)
1858 | lwz STR:CARG1, 4(BASE)
1859 | blt ->fff_fallback
1860 | lwz CARG2, 8(BASE)
1862 | lwz TMP1, 12(BASE)
1870 | lwz TMP2, 20(BASE)
1871 | bne ->fff_fallback
1873 | checknum CARG2; bne ->fff_fallback
1875 | checknum CARG3; bge ->fff_fallback
1878 | checknum CARG2; bge ->fff_fallback
1880 | checkstr TMP0; bne ->fff_fallback
1884 | lwz TMP0, STR:CARG1->len
1885 | cmplw TMP0, TMP2 // len < end? (unsigned compare)
1886 | addi TMP3, TMP2, 1
1889 | cmpwi TMP1, 0 // start <= 0?
1890 | add TMP3, TMP1, TMP0
1893 | sub CARG3, TMP2, TMP1
1894 | addi CARG2, STR:CARG1, #STR-1
1895 | srawi TMP0, CARG3, 31
1896 | addi CARG3, CARG3, 1
1897 | add CARG2, CARG2, TMP1
1898 | andc CARG3, CARG3, TMP0
1901 |5: // Negative end or overflow.
1902 | sub CARG2, TMP0, TMP2
1903 | srawi CARG2, CARG2, 31
1904 | andc TMP3, TMP3, CARG2 // end = end > len ? len : end+len+1
1905 | add TMP2, TMP0, TMP3
1908 |7: // Negative start or underflow.
1909 | addic CARG3, TMP1, -1
1910 | subfe CARG3, CARG3, CARG3
1911 | srawi CARG2, TMP3, 31 // Note: modifies carry.
1912 | andc TMP3, TMP3, CARG3
1913 | andc TMP1, TMP3, CARG2
1914 | addi TMP1, TMP1, 1 // start = 1 + (start ? start+len : 0)
1917 |.ffunc string_rep // Only handle the 1-char case inline.
1919 | cmplwi NARGS8:RC, 16
1921 | lwz STR:CARG1, 4(BASE)
1922 | lwz CARG4, 8(BASE)
1924 | lwz CARG3, 12(BASE)
1926 | lfd FARG2, 8(BASE)
1928 | blt ->fff_fallback
1929 | checkstr TMP0; bne ->fff_fallback
1931 | checknum CARG4; bne ->fff_fallback
1933 | checknum CARG4; bge ->fff_fallback
1934 | toint CARG3, FARG2
1936 | lwz TMP0, STR:CARG1->len
1938 | lwz TMP1, DISPATCH_GL(tmpbuf.sz)(DISPATCH)
1939 | ble >2 // Count <= 0? (or non-int)
1941 | subi TMP2, CARG3, 1
1942 | blt >2 // Zero length string?
1943 | cmplw cr1, TMP1, CARG3
1944 | bne ->fff_fallback // Fallback for > 1-char strings.
1945 | lbz TMP0, STR:CARG1[1]
1946 | lwz CARG2, DISPATCH_GL(tmpbuf.buf)(DISPATCH)
1947 | blt cr1, ->fff_fallback
1948 |1: // Fill buffer with char. Yes, this is suboptimal code (do you care?).
1950 | stbx TMP0, CARG2, TMP2
1951 | subi TMP2, TMP2, 1
1954 |2: // Return empty string.
1955 | la STR:CARG1, DISPATCH_GL(strempty)(DISPATCH)
1959 |.ffunc string_reverse
1961 | cmplwi NARGS8:RC, 8
1962 | lwz CARG3, 0(BASE)
1963 | lwz STR:CARG1, 4(BASE)
1964 | blt ->fff_fallback
1966 | lwz TMP1, DISPATCH_GL(tmpbuf.sz)(DISPATCH)
1967 | bne ->fff_fallback
1968 | lwz CARG3, STR:CARG1->len
1969 | la CARG1, #STR(STR:CARG1)
1970 | lwz CARG2, DISPATCH_GL(tmpbuf.buf)(DISPATCH)
1973 | subi TMP3, CARG3, 1
1974 | blt ->fff_fallback
1975 |1: // Reverse string copy.
1977 | lbzx TMP1, CARG1, TMP2
1979 | stbx TMP1, CARG2, TMP3
1980 | subi TMP3, TMP3, 1
1981 | addi TMP2, TMP2, 1
1984 |.macro ffstring_case, name, lo
1987 | cmplwi NARGS8:RC, 8
1988 | lwz CARG3, 0(BASE)
1989 | lwz STR:CARG1, 4(BASE)
1990 | blt ->fff_fallback
1992 | lwz TMP1, DISPATCH_GL(tmpbuf.sz)(DISPATCH)
1993 | bne ->fff_fallback
1994 | lwz CARG3, STR:CARG1->len
1995 | la CARG1, #STR(STR:CARG1)
1996 | lwz CARG2, DISPATCH_GL(tmpbuf.buf)(DISPATCH)
1999 | blt ->fff_fallback
2000 |1: // ASCII case conversion.
2002 | lbzx TMP1, CARG1, TMP2
2004 | subi TMP0, TMP1, lo
2005 | xori TMP3, TMP1, 0x20
2006 | addic TMP0, TMP0, -26
2007 | subfe TMP3, TMP3, TMP3
2008 | andi. TMP3, TMP3, 0x20
2009 | xor TMP1, TMP1, TMP3
2010 | stbx TMP1, CARG2, TMP2
2011 | addi TMP2, TMP2, 1
2015 |ffstring_case string_lower, 65
2016 |ffstring_case string_upper, 97
2018 |//-- Table library ------------------------------------------------------
2020 |.ffunc_1 table_getn
2021 | checktab CARG3; bne ->fff_fallback
2022 | bl extern lj_tab_len // (GCtab *t)
2023 | // Returns uint32_t (but less than 2^31).
2026 |//-- Bit library --------------------------------------------------------
2028 |.macro .ffunc_bit, name
2030 | .ffunc_1 bit_..name
2031 | checknum CARG3; bnel ->fff_tobit_fb
2033 | .ffunc_n bit_..name
2034 | fadd FARG1, FARG1, TOBIT
2036 | lwz CARG1, TMPD_LO
2040 |.macro .ffunc_bit_op, name, ins
2042 | addi TMP1, BASE, 8
2043 | add TMP2, BASE, NARGS8:RC
2045 | lwz CARG4, 0(TMP1)
2046 | cmplw cr1, TMP1, TMP2
2048 | lwz CARG2, 4(TMP1)
2050 | lfd FARG1, 0(TMP1)
2052 | bgey cr1, ->fff_resi
2055 | bnel ->fff_bitop_fb
2057 | fadd FARG1, FARG1, TOBIT
2058 | bge ->fff_fallback
2060 | lwz CARG2, TMPD_LO
2062 | ins CARG1, CARG1, CARG2
2063 | addi TMP1, TMP1, 8
2067 |.ffunc_bit_op band, and
2068 |.ffunc_bit_op bor, or
2069 |.ffunc_bit_op bxor, xor
2072 | rotlwi TMP0, CARG1, 8
2073 | rlwimi TMP0, CARG1, 24, 0, 7
2074 | rlwimi TMP0, CARG1, 24, 16, 23
2082 |.macro .ffunc_bit_sh, name, ins, shmod
2084 | .ffunc_2 bit_..name
2085 | checknum CARG3; bnel ->fff_tobit_fb
2086 | // Note: no inline conversion from number for 2nd argument!
2087 | checknum CARG4; bne ->fff_fallback
2089 | .ffunc_nn bit_..name
2090 | fadd FARG1, FARG1, TOBIT
2091 | fadd FARG2, FARG2, TOBIT
2093 | lwz CARG1, TMPD_LO
2095 | lwz CARG2, TMPD_LO
2098 | rlwinm CARG2, CARG2, 0, 27, 31
2102 | ins CRET1, CARG1, CARG2
2106 |.ffunc_bit_sh lshift, slw, 1
2107 |.ffunc_bit_sh rshift, srw, 1
2108 |.ffunc_bit_sh arshift, sraw, 1
2109 |.ffunc_bit_sh rol, rotlw, 0
2110 |.ffunc_bit_sh ror, rotlw, 2
2117 | tonum_i FARG1, CRET1
2120 | lwz PC, FRAME_PC(BASE)
2122 | stfd FARG1, -8(BASE)
2125 |// Fallback FP number to bit conversion.
2128 | lfd FARG1, 0(BASE)
2129 | bgt ->fff_fallback
2130 | fadd FARG1, FARG1, TOBIT
2132 | lwz CARG1, TMPD_LO
2137 | lfd FARG1, 0(TMP1)
2138 | bgt ->fff_fallback
2139 | fadd FARG1, FARG1, TOBIT
2141 | lwz CARG2, TMPD_LO
2145 |//-----------------------------------------------------------------------
2147 |->fff_fallback: // Call fast function fallback handler.
2148 | // BASE = new base, RB = CFUNC, RC = nargs*8
2149 | lwz TMP3, CFUNC:RB->f
2150 | add TMP1, BASE, NARGS8:RC
2151 | lwz PC, FRAME_PC(BASE) // Fallback may overwrite PC.
2152 | addi TMP0, TMP1, 8*LUA_MINSTACK
2153 | lwz TMP2, L->maxstack
2154 | stw PC, SAVE_PC // Redundant (but a defined value).
2159 | bgt >5 // Need to grow stack.
2161 | bctrl // (lua_State *L)
2162 | // Either throws an error, or recovers and returns -1, 0 or nresults+1.
2167 | bgt ->fff_res // Returned nresults+1?
2168 |1: // Returned 0 or -1: retry fast path.
2170 | lwz LFUNC:RB, FRAME_FUNC(BASE)
2171 | sub NARGS8:RC, TMP0, BASE
2172 | bne ->vm_call_tail // Returned -1?
2173 | ins_callt // Returned 0: retry fast path.
2175 |// Reconstruct previous base for vmeta_call during tailcall.
2177 | andi. TMP0, PC, FRAME_TYPE
2178 | rlwinm TMP1, PC, 0, 0, 28
2181 | decode_RA8 TMP1, INS
2183 | sub TMP2, BASE, TMP1
2184 | b ->vm_call_dispatch // Resolve again for tailcall.
2186 |5: // Grow stack for fallback handler.
2187 | li CARG2, LUA_MINSTACK
2188 | bl extern lj_state_growstack // (lua_State *L, int n)
2190 | cmpw TMP0, TMP0 // Set 4*cr0+eq to force retry.
2193 |->fff_gcstep: // Call GC step function.
2194 | // BASE = new base, RC = nargs*8
2197 | add TMP0, BASE, NARGS8:RC
2198 | stw PC, SAVE_PC // Redundant (but a defined value).
2201 | bl extern lj_gc_step // (lua_State *L)
2205 | sub NARGS8:RC, TMP0, BASE
2206 | lwz CFUNC:RB, FRAME_FUNC(BASE)
2209 |//-----------------------------------------------------------------------
2210 |//-- Special dispatch targets -------------------------------------------
2211 |//-----------------------------------------------------------------------
2213 |->vm_record: // Dispatch target for recording phase.
2215 | lbz TMP3, DISPATCH_GL(hookmask)(DISPATCH)
2216 | andi. TMP0, TMP3, HOOK_VMEVENT // No recording while in vmevent.
2218 | // Decrement the hookcount for consistency, but always do the call.
2219 | lwz TMP2, DISPATCH_GL(hookcount)(DISPATCH)
2220 | andi. TMP0, TMP3, HOOK_ACTIVE
2222 | subi TMP2, TMP2, 1
2223 | andi. TMP0, TMP3, LUA_MASKLINE|LUA_MASKCOUNT
2225 | stw TMP2, DISPATCH_GL(hookcount)(DISPATCH)
2229 |->vm_rethook: // Dispatch target for return hooks.
2230 | lbz TMP3, DISPATCH_GL(hookmask)(DISPATCH)
2231 | andi. TMP0, TMP3, HOOK_ACTIVE // Hook already active?
2233 |5: // Re-dispatch to static ins.
2234 | addi TMP1, TMP1, GG_DISP2STATIC // Assumes decode_OP4 TMP1, INS.
2235 | lwzx TMP0, DISPATCH, TMP1
2239 |->vm_inshook: // Dispatch target for instr/line hooks.
2240 | lbz TMP3, DISPATCH_GL(hookmask)(DISPATCH)
2241 | lwz TMP2, DISPATCH_GL(hookcount)(DISPATCH)
2242 | andi. TMP0, TMP3, HOOK_ACTIVE // Hook already active?
2243 | rlwinm TMP0, TMP3, 31-LUA_HOOKLINE, 31, 0
2246 | cmpwi cr1, TMP0, 0
2247 | addic. TMP2, TMP2, -1
2249 | stw TMP2, DISPATCH_GL(hookcount)(DISPATCH)
2254 | stw MULTRES, SAVE_MULTRES
2257 | // SAVE_PC must hold the _previous_ PC. The callee updates it with PC.
2258 | bl extern lj_dispatch_ins // (lua_State *L, const BCIns *pc)
2261 |4: // Re-dispatch to static ins.
2263 | decode_OP4 TMP1, INS
2264 | decode_RB8 RB, INS
2265 | addi TMP1, TMP1, GG_DISP2STATIC
2266 | decode_RD8 RD, INS
2267 | lwzx TMP0, DISPATCH, TMP1
2268 | decode_RA8 RA, INS
2269 | decode_RC8 RC, INS
2273 |->cont_hook: // Continue from hook yield.
2275 | lwz MULTRES, -20(RB) // Restore MULTRES for *M ins.
2278 |->vm_hotloop: // Hot loop counter underflow.
2280 | lwz LFUNC:TMP1, FRAME_FUNC(BASE)
2281 | addi CARG1, DISPATCH, GG_DISP2J
2283 | lwz TMP1, LFUNC:TMP1->pc
2285 | stw L, DISPATCH_J(L)(DISPATCH)
2286 | lbz TMP1, PC2PROTO(framesize)(TMP1)
2288 | slwi TMP1, TMP1, 3
2289 | add TMP1, BASE, TMP1
2291 | bl extern lj_trace_hot // (jit_State *J, const BCIns *pc)
2295 |->vm_callhook: // Dispatch target for call hooks.
2301 |->vm_hotcall: // Hot call counter underflow.
2306 | add TMP0, BASE, RC
2312 | bl extern lj_dispatch_call // (lua_State *L, const BCIns *pc)
2313 | // Returns ASMFunction.
2316 | stw ZERO, SAVE_PC // Invalidate for subsequent line hook.
2317 | sub NARGS8:RC, TMP0, BASE
2319 | lwz LFUNC:RB, FRAME_FUNC(BASE)
2324 |//-----------------------------------------------------------------------
2325 |//-- Trace exit handler -------------------------------------------------
2326 |//-----------------------------------------------------------------------
2328 |.macro savex_, a, b, c, d
2329 | stfd f..a, 16+a*8(sp)
2330 | stfd f..b, 16+b*8(sp)
2331 | stfd f..c, 16+c*8(sp)
2332 | stfd f..d, 16+d*8(sp)
2337 | addi sp, sp, -(16+32*8+32*4)
2338 | stmw r2, 16+32*8+2*4(sp)
2339 | addi DISPATCH, JGL, -GG_DISP2G-32768
2340 | li CARG2, ~LJ_VMST_EXIT
2341 | lwz CARG1, 16+32*8+32*4(sp) // Get stack chain.
2342 | stw CARG2, DISPATCH_GL(vmstate)(DISPATCH)
2344 | stw CARG1, 0(sp) // Store extended stack chain.
2345 | mcrxr cr0 // Clear SO flag.
2347 | addi CARG2, sp, 16+32*8+32*4 // Recompute original value of sp.
2349 | stw CARG2, 16+32*8+1*4(sp) // Store sp in RID_SP.
2350 | savex_ 12,13,14,15
2353 | savex_ 16,17,18,19
2354 | stw TMP1, 16+32*8+0*4(sp) // Clear RID_TMP.
2355 | savex_ 20,21,22,23
2356 | lhz CARG4, 2(CARG3) // Load trace number.
2357 | savex_ 24,25,26,27
2358 | lwz L, DISPATCH_GL(jit_L)(DISPATCH)
2359 | savex_ 28,29,30,31
2360 | sub CARG3, TMP0, CARG3 // Compute exit number.
2361 | lwz BASE, DISPATCH_GL(jit_base)(DISPATCH)
2362 | srwi CARG3, CARG3, 2
2363 | stw L, DISPATCH_J(L)(DISPATCH)
2364 | subi CARG3, CARG3, 2
2365 | stw TMP1, DISPATCH_GL(jit_L)(DISPATCH)
2366 | stw CARG4, DISPATCH_J(parent)(DISPATCH)
2368 | addi CARG1, DISPATCH, GG_DISP2J
2369 | stw CARG3, DISPATCH_J(exitno)(DISPATCH)
2370 | addi CARG2, sp, 16
2371 | bl extern lj_trace_exit // (jit_State *J, ExitState *ex)
2372 | // Returns MULTRES (unscaled) or negated error code.
2373 | lwz TMP1, L->cframe
2376 | rlwinm sp, TMP1, 0, 0, 29
2377 | lwz PC, SAVE_PC // Get SAVE_PC.
2379 | stw L, SAVE_L // Set SAVE_L (on-trace resume/yield).
2384 | // CARG1 = MULTRES or negated error code, BASE, PC and JGL set.
2386 | addi DISPATCH, JGL, -GG_DISP2G-32768
2389 | blt >3 // Check for error from exit.
2390 | lwz LFUNC:TMP1, FRAME_FUNC(BASE)
2391 | slwi MULTRES, CARG1, 3
2393 | stw MULTRES, SAVE_MULTRES
2394 | lwz TMP1, LFUNC:TMP1->pc
2395 | stw TMP2, DISPATCH_GL(jit_L)(DISPATCH)
2396 | lwz KBASE, PC2PROTO(k)(TMP1)
2397 | // Setup type comparison constants.
2398 | li TISNUM, LJ_TISNUM
2399 | lus TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float).
2402 | ori TMP3, TMP3, 0x0004 // TONUM = 2^52 + 2^51 + 2^31 (float).
2405 | lus TMP0, 0x4338 // Hiword of 2^52 + 2^51 (double)
2406 | li TISNIL, LJ_TNIL
2407 | stw TMP0, TONUM_HI
2409 | // Modified copy of ins_next which handles function header dispatch, too.
2412 | // Assumes TISNIL == ~LJ_VMST_INTERP == -1.
2413 | stw TISNIL, DISPATCH_GL(vmstate)(DISPATCH)
2414 | decode_OP4 TMP1, INS
2415 | decode_RA8 RA, INS
2416 | lwzx TMP0, DISPATCH, TMP1
2418 | cmplwi TMP1, BC_FUNCF*4 // Function header?
2420 | decode_RB8 RB, INS
2421 | decode_RD8 RD, INS
2422 | decode_RC8 RC, INS
2425 | subi RC, MULTRES, 8
2429 |3: // Rethrow error from the right C frame.
2432 | bl extern lj_err_throw // (lua_State *L, int errcode)
2435 |//-----------------------------------------------------------------------
2436 |//-- Math helper functions ----------------------------------------------
2437 |//-----------------------------------------------------------------------
2439 | // NYI: Use internal implementation.
2450 | divwo. TMP0, CARG1, CARG2
2452 | xor. CARG3, CARG1, CARG2
2453 | mullw TMP0, TMP0, CARG2
2454 | sub CARG1, CARG1, TMP0
2456 | cmpwi CARG1, 0; beqlr
2457 | add CARG1, CARG1, CARG2
2463 | mcrxr cr0 // Clear SO for -2147483648 % -1 and return 0.
2466 |// Callable from C: double lj_vm_foldarith(double x, double y, int op)
2467 |// Compute x op y for basic arithmetic operators (+ - * / % ^ and unary -)
2468 |// and basic math functions. ORDER ARITH
2472 | fadd FARG1, FARG1, FARG2; blr
2474 | fsub FARG1, FARG1, FARG2; blr
2476 | cmplwi CARG1, 3; beq >1; bgt >2
2477 | fmul FARG1, FARG1, FARG2; blr
2479 | fdiv FARG1, FARG1, FARG2; blr
2481 | cmplwi CARG1, 5; beq >1; bgt >2
2482 | // NYI: Use internal implementation of floor and avoid spills.
2483 | stwu sp, -32(sp); stfd f14, 16(sp); stfd f15, 24(sp)
2486 | fdiv FARG1, FARG1, FARG2
2491 | fmul FARG1, FARG1, f15
2493 | fsub FARG1, f14, FARG1;
2494 | lfd f14, 16(sp); lfd f15, 24(sp); addi sp, sp, 32; blr
2498 | cmplwi CARG1, 7; beq >1; bgt >2
2499 | fneg FARG1, FARG1; blr
2501 | fabs FARG1, FARG1; blr
2504 | cmplwi CARG1, 9; beq >9; bgt >2
2506 | // No support needed for IR_LDEXP.
2508 | cmplwi CARG1, 11; bgt >9
2509 | fsub f0, FARG1, FARG2
2511 | fsel FARG1, f0, FARG2, FARG1 // IR_MAX
2514 | fsel FARG1, f0, FARG1, FARG2 // IR_MIN
2519 | NYI // Other operations only needed by JIT compiler.
2522 |//-----------------------------------------------------------------------
2523 |//-- Miscellaneous functions --------------------------------------------
2524 |//-----------------------------------------------------------------------
2526 |//-----------------------------------------------------------------------
2527 |//-- FFI helper functions -----------------------------------------------
2528 |//-----------------------------------------------------------------------
2530 |->vm_ffi_call: // Call C function via FFI.
2531 | // Caveat: needs special frame unwinding, see below.
2533 | .type CCSTATE, CCallState, CARG1
2534 | lwz TMP1, CCSTATE->spadj
2536 | lbz CARG2, CCSTATE->nsp
2537 | lbz CARG3, CCSTATE->nfpr
2540 | cmpwi cr1, CARG3, 0
2542 | addic. CARG2, CARG2, -1
2543 | stwux sp, sp, TMP1
2544 | crnot 4*cr1+eq, 4*cr1+eq // For vararg calls.
2547 | stw CCSTATE, -8(TMP2)
2549 | la TMP1, CCSTATE->stack
2550 | slwi CARG2, CARG2, 2
2554 | lwzx TMP0, TMP1, CARG2
2555 | stwx TMP0, TMP2, CARG2
2556 | addic. CARG2, CARG2, -4
2560 | lfd f1, CCSTATE->fpr[0]
2561 | lfd f2, CCSTATE->fpr[1]
2562 | lfd f3, CCSTATE->fpr[2]
2563 | lfd f4, CCSTATE->fpr[3]
2564 | lfd f5, CCSTATE->fpr[4]
2565 | lfd f6, CCSTATE->fpr[5]
2566 | lfd f7, CCSTATE->fpr[6]
2567 | lfd f8, CCSTATE->fpr[7]
2569 | lwz TMP0, CCSTATE->func
2570 | lwz CARG2, CCSTATE->gpr[1]
2571 | lwz CARG3, CCSTATE->gpr[2]
2572 | lwz CARG4, CCSTATE->gpr[3]
2573 | lwz CARG5, CCSTATE->gpr[4]
2575 | lwz r8, CCSTATE->gpr[5]
2576 | lwz r9, CCSTATE->gpr[6]
2577 | lwz r10, CCSTATE->gpr[7]
2578 | lwz CARG1, CCSTATE->gpr[0] // Do this last, since CCSTATE is CARG1.
2580 | lwz CCSTATE:TMP1, -8(r14)
2583 | stw CARG1, CCSTATE:TMP1->gpr[0]
2584 | stfd FARG1, CCSTATE:TMP1->fpr[0]
2585 | stw CARG2, CCSTATE:TMP1->gpr[1]
2587 | stw CARG3, CCSTATE:TMP1->gpr[2]
2589 | stw CARG4, CCSTATE:TMP1->gpr[3]
2593 |// Note: vm_ffi_call must be the last function in this object file!
2595 |//-----------------------------------------------------------------------
2598 /* Generate the code for a single instruction. */
2599 static void build_ins(BuildCtx *ctx, BCOp op, int defop)
2606 /* -- Comparison ops ---------------------------------------------------- */
2608 /* Remember: all ops branch for a true comparison, fall through otherwise. */
2610 case BC_ISLT: case BC_ISGE: case BC_ISLE: case BC_ISGT:
2611 | // RA = src1*8, RD = src2*8, JMP with RD = target
2613 | lwzux TMP0, RA, BASE
2616 | lwzux TMP1, RD, BASE
2618 | checknum cr0, TMP0
2620 | decode_RD4 TMP2, TMP2
2621 | checknum cr1, TMP1
2622 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
2626 if (op == BC_ISLT) {
2628 } else if (op == BC_ISGE) {
2630 } else if (op == BC_ISLE) {
2640 |7: // RA is not an integer.
2641 | bgt cr0, ->vmeta_comp
2642 | // RA is a number.
2644 | bgt cr1, ->vmeta_comp
2646 | // RA is a number, RD is an integer.
2650 |8: // RA is an integer, RD is not an integer.
2651 | bgt cr1, ->vmeta_comp
2652 | // RA is an integer, RD is a number.
2658 if (op == BC_ISLT) {
2660 } else if (op == BC_ISGE) {
2662 } else if (op == BC_ISLE) {
2663 | cror 4*cr0+lt, 4*cr0+lt, 4*cr0+eq
2666 | cror 4*cr0+lt, 4*cr0+lt, 4*cr0+eq
2671 | lwzx TMP0, BASE, RA
2674 | lwzx TMP1, BASE, RD
2675 | checknum cr0, TMP0
2678 | checknum cr1, TMP1
2679 | decode_RD4 TMP2, TMP2
2680 | bge cr0, ->vmeta_comp
2681 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
2682 | bge cr1, ->vmeta_comp
2684 if (op == BC_ISLT) {
2686 } else if (op == BC_ISGE) {
2688 } else if (op == BC_ISLE) {
2689 | cror 4*cr0+lt, 4*cr0+lt, 4*cr0+eq
2692 | cror 4*cr0+lt, 4*cr0+lt, 4*cr0+eq
2701 case BC_ISEQV: case BC_ISNEV:
2702 vk = op == BC_ISEQV;
2703 | // RA = src1*8, RD = src2*8, JMP with RD = target
2705 | lwzux TMP0, RA, BASE
2708 | lwzux TMP1, RD, BASE
2709 | checknum cr0, TMP0
2711 | checknum cr1, TMP1
2712 | decode_RD4 TMP2, TMP2
2714 | cror 4*cr7+gt, 4*cr0+gt, 4*cr1+gt
2715 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
2717 | ble cr7, ->BC_ISEQN_Z
2719 | ble cr7, ->BC_ISNEN_Z
2722 | lwzux TMP0, RA, BASE
2726 | lwzux TMP1, RD, BASE
2727 | checknum cr0, TMP0
2728 | decode_RD4 TMP2, TMP2
2730 | checknum cr1, TMP1
2731 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
2745 |5: // Either or both types are not numbers.
2751 | cmpwi cr7, TMP0, LJ_TCDATA
2752 | cmpwi cr5, TMP1, LJ_TCDATA
2756 | cmplwi cr1, TMP3, ~LJ_TISPRI // Primitive?
2758 | cror 4*cr7+eq, 4*cr7+eq, 4*cr5+eq
2760 | cmplwi cr6, TMP3, ~LJ_TISTABUD // Table or userdata?
2762 | beq cr7, ->vmeta_equal_cd
2764 | cmplw cr5, CARG2, CARG3
2765 | crandc 4*cr0+gt, 4*cr0+eq, 4*cr1+gt // 2: Same type and primitive.
2766 | crorc 4*cr0+lt, 4*cr5+eq, 4*cr0+eq // 1: Same tv or different type.
2767 | crand 4*cr0+eq, 4*cr0+eq, 4*cr5+eq // 0: Same type and same tv.
2769 | cror 4*cr0+eq, 4*cr0+eq, 4*cr0+gt // 0 or 2.
2770 | cror 4*cr0+lt, 4*cr0+lt, 4*cr0+gt // 1 or 2.
2781 | bge cr0, >2 // Done if 1 or 2.
2786 | blt cr0, <1 // Done if 1 or 2.
2788 | blt cr6, <1 // Done if not tab/ud.
2790 | // Different tables or userdatas. Need to check __eq metamethod.
2791 | // Field metatable must be at same offset for GCtab and GCudata!
2792 | lwz TAB:TMP2, TAB:CARG2->metatable
2793 | li CARG4, 1-vk // ne = 0 or 1.
2794 | cmplwi TAB:TMP2, 0
2795 | beq <1 // No metatable?
2796 | lbz TMP2, TAB:TMP2->nomm
2797 | andi. TMP2, TMP2, 1<<MM_eq
2798 | bne <1 // Or 'no __eq' flag set?
2799 | mr PC, SAVE0 // Restore old PC.
2800 | b ->vmeta_equal // Handle __eq metamethod.
2803 case BC_ISEQS: case BC_ISNES:
2804 vk = op == BC_ISEQS;
2805 | // RA = src*8, RD = str_const*8 (~), JMP with RD = target
2806 | lwzux TMP0, RA, BASE
2808 | lwz STR:TMP3, 4(RA)
2813 | cmpwi TMP0, LJ_TCDATA
2815 | lwzx STR:TMP1, KBASE, RD // KBASE-4-str_const*4
2816 | subfic TMP0, TMP0, LJ_TSTR
2818 | beq ->vmeta_equal_cd
2820 | sub TMP1, STR:TMP1, STR:TMP3
2821 | or TMP0, TMP0, TMP1
2822 | decode_RD4 TMP2, TMP2
2823 | subfic TMP0, TMP0, 0
2824 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
2825 | subfe TMP1, TMP1, TMP1
2827 | andc TMP2, TMP2, TMP1
2829 | and TMP2, TMP2, TMP1
2835 case BC_ISEQN: case BC_ISNEN:
2836 vk = op == BC_ISEQN;
2837 | // RA = src*8, RD = num_const*8, JMP with RD = target
2839 | lwzux TMP0, RA, BASE
2842 | lwzux TMP1, RD, KBASE
2843 | checknum cr0, TMP0
2845 | checknum cr1, TMP1
2846 | decode_RD4 TMP2, TMP2
2848 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
2860 |->BC_ISEQN_Z: // Dummy label.
2862 |->BC_ISNEN_Z: // Dummy label.
2864 | lwzx TMP0, BASE, RA
2868 | lfdx f1, KBASE, RD
2869 | decode_RD4 TMP2, TMP2
2871 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
2894 | cmpwi TMP0, LJ_TCDATA
2895 | beq ->vmeta_equal_cd
2899 |7: // RA is not an integer.
2901 | // RA is a number.
2904 | // RA is a number, RD is an integer.
2908 |8: // RA is an integer, RD is a number.
2918 case BC_ISEQP: case BC_ISNEP:
2919 vk = op == BC_ISEQP;
2920 | // RA = src*8, RD = primitive_type*8 (~), JMP with RD = target
2921 | lwzx TMP0, BASE, RA
2927 | cmpwi TMP0, LJ_TCDATA
2929 | sub TMP0, TMP0, TMP1
2931 | beq ->vmeta_equal_cd
2933 | decode_RD4 TMP2, TMP2
2934 | addic TMP0, TMP0, -1
2935 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
2936 | subfe TMP1, TMP1, TMP1
2938 | and TMP2, TMP2, TMP1
2940 | andc TMP2, TMP2, TMP1
2946 /* -- Unary test and copy ops ------------------------------------------- */
2948 case BC_ISTC: case BC_ISFC: case BC_IST: case BC_ISF:
2949 | // RA = dst*8 or unused, RD = src*8, JMP with RD = target
2950 | lwzx TMP0, BASE, RD
2953 if (op == BC_IST || op == BC_ISF) {
2954 | subfic TMP0, TMP0, LJ_TTRUE
2955 | decode_RD4 TMP2, INS
2956 | subfe TMP1, TMP1, TMP1
2957 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
2959 | andc TMP2, TMP2, TMP1
2961 | and TMP2, TMP2, TMP1
2965 | li TMP1, LJ_TFALSE
2968 if (op == BC_ISTC) {
2973 | addis PC, PC, -(BCBIAS_J*4 >> 16)
2974 | decode_RD4 TMP2, INS
2975 | stfdx f0, BASE, RA
2982 /* -- Unary ops --------------------------------------------------------- */
2985 | // RA = dst*8, RD = src*8
2988 | stfdx f0, BASE, RA
2992 | // RA = dst*8, RD = src*8
2994 | lwzx TMP0, BASE, RD
2995 | subfic TMP1, TMP0, LJ_TTRUE
2996 | adde TMP0, TMP0, TMP1
2997 | stwx TMP0, BASE, RA
3001 | // RA = dst*8, RD = src*8
3002 | lwzux TMP1, RD, BASE
3011 | stwux TISNUM, RA, BASE
3015 |4: // Potential overflow.
3016 | mcrxr cr0; bley <1 // Ignore unrelated overflow.
3017 | lus TMP1, 0x41e0 // 2^31.
3023 | xoris TMP1, TMP1, 0x8000
3026 | stwux TMP1, RA, BASE
3035 | // RA = dst*8, RD = src*8
3036 | lwzux TMP0, RD, BASE
3038 | checkstr TMP0; bne >2
3039 | lwz CRET1, STR:CARG1->len
3043 | stwux TISNUM, RA, BASE
3046 | tonum_u f0, CRET1 // Result is a non-negative integer.
3048 | stfdx f0, BASE, RA
3052 | checktab TMP0; bne ->vmeta_len
3053 #ifdef LUAJIT_ENABLE_LUA52COMPAT
3054 | lwz TAB:TMP2, TAB:CARG1->metatable
3055 | cmplwi TAB:TMP2, 0
3060 | bl extern lj_tab_len // (GCtab *t)
3061 | // Returns uint32_t (but less than 2^31).
3063 #ifdef LUAJIT_ENABLE_LUA52COMPAT
3065 | lbz TMP0, TAB:TMP2->nomm
3066 | andi. TMP0, TMP0, 1<<MM_len
3067 | bne <3 // 'no __len' flag set: done.
3072 /* -- Binary ops -------------------------------------------------------- */
3074 |.macro ins_arithpre
3075 | // RA = dst*8, RB = src1*8, RC = src2*8 | num_const*8
3076 ||vk = ((int)op - BC_ADDVN) / (BC_ADDNV-BC_ADDVN);
3079 | lwzx TMP1, BASE, RB
3081 | lwzx TMP2, KBASE, RC
3083 | lfdx f14, BASE, RB
3084 | lfdx f15, KBASE, RC
3086 | checknum cr0, TMP1
3087 | checknum cr1, TMP2
3088 | crand 4*cr0+lt, 4*cr0+lt, 4*cr1+lt
3089 | bge ->vmeta_arith_vn
3091 | checknum TMP1; bge ->vmeta_arith_vn
3095 | lwzx TMP1, BASE, RB
3097 | lwzx TMP2, KBASE, RC
3099 | lfdx f15, BASE, RB
3100 | lfdx f14, KBASE, RC
3102 | checknum cr0, TMP1
3103 | checknum cr1, TMP2
3104 | crand 4*cr0+lt, 4*cr0+lt, 4*cr1+lt
3105 | bge ->vmeta_arith_nv
3107 | checknum TMP1; bge ->vmeta_arith_nv
3111 | lwzx TMP1, BASE, RB
3112 | lwzx TMP2, BASE, RC
3113 | lfdx f14, BASE, RB
3114 | lfdx f15, BASE, RC
3115 | checknum cr0, TMP1
3116 | checknum cr1, TMP2
3117 | crand 4*cr0+lt, 4*cr0+lt, 4*cr1+lt
3118 | bge ->vmeta_arith_vv
3123 |.macro ins_arithfallback, ins
3126 | ins ->vmeta_arith_vn2
3129 | ins ->vmeta_arith_nv2
3132 | ins ->vmeta_arith_vv2
3137 |.macro intmod, a, b, c
3141 |.macro fpmod, a, b, c
3144 | // NYI: Use internal implementation of floor.
3145 | bl extern floor // floor(b/c)
3147 | fsub a, b, a // b - floor(b/c)*c
3150 |.macro ins_arithfp, fpins
3152 |.if "fpins" == "fpmod_"
3153 | b ->BC_MODVN_Z // Avoid 3 copies. It's slow anyway.
3155 | fpins f0, f14, f15
3157 | stfdx f0, BASE, RA
3162 |.macro ins_arithdn, intins, fpins
3163 | // RA = dst*8, RB = src1*8, RC = src2*8 | num_const*8
3164 ||vk = ((int)op - BC_ADDVN) / (BC_ADDNV-BC_ADDVN);
3167 | lwzux TMP1, RB, BASE
3168 | lwzux TMP2, RC, KBASE
3170 | checknum cr0, TMP1
3174 | lwzux TMP1, RB, BASE
3175 | lwzux TMP2, RC, KBASE
3177 | checknum cr0, TMP1
3181 | lwzux TMP1, RB, BASE
3182 | lwzux TMP2, RC, BASE
3184 | checknum cr0, TMP1
3188 | checknum cr1, TMP2
3191 | intins CARG1, CARG1, CARG2
3195 | stwux TISNUM, RA, BASE
3200 | mcrxr cr0; bley <1 // Ignore unrelated overflow.
3201 | ins_arithfallback b
3205 | crand 4*cr0+lt, 4*cr0+lt, 4*cr1+lt
3209 | crand 4*cr0+lt, 4*cr0+lt, 4*cr1+lt
3212 | ins_arithfallback bge
3213 |.if "fpins" == "fpmod_"
3214 | b ->BC_MODVN_Z // Avoid 3 copies. It's slow anyway.
3216 | fpins f0, f14, f15
3218 | stfdx f0, BASE, RA
3223 |.macro ins_arith, intins, fpins
3225 | ins_arithdn intins, fpins
3231 case BC_ADDVN: case BC_ADDNV: case BC_ADDVV:
3232 | ins_arith addo., fadd
3234 case BC_SUBVN: case BC_SUBNV: case BC_SUBVV:
3235 | ins_arith subo., fsub
3237 case BC_MULVN: case BC_MULNV: case BC_MULVV:
3238 | ins_arith mullwo., fmul
3240 case BC_DIVVN: case BC_DIVNV: case BC_DIVVV:
3244 | ins_arith intmod, fpmod
3246 case BC_MODNV: case BC_MODVV:
3247 | ins_arith intmod, fpmod_
3250 | // NYI: (partial) integer arithmetic.
3251 | lwzx TMP1, BASE, RB
3252 | lfdx FARG1, BASE, RB
3253 | lwzx TMP2, BASE, RC
3254 | lfdx FARG2, BASE, RC
3255 | checknum cr0, TMP1
3256 | checknum cr1, TMP2
3257 | crand 4*cr0+lt, 4*cr0+lt, 4*cr1+lt
3258 | bge ->vmeta_arith_vv
3261 | stfdx FARG1, BASE, RA
3266 | // RA = dst*8, RB = src_start*8, RC = src_end*8
3269 | add CARG2, BASE, RC
3274 | srwi CARG3, CARG3, 3
3275 | bl extern lj_meta_cat // (lua_State *L, TValue *top, int left)
3276 | // Returns NULL (finished) or TValue * (metamethod).
3281 | lfdx f0, BASE, SAVE0 // Copy result from RB to RA.
3282 | stfdx f0, BASE, RA
3286 /* -- Constant ops ------------------------------------------------------ */
3289 | // RA = dst*8, RD = str_const*8 (~)
3291 | subfic TMP1, TMP1, -4
3293 | lwzx TMP0, KBASE, TMP1 // KBASE-4-str_const*4
3295 | stwux TMP2, RA, BASE
3301 | // RA = dst*8, RD = cdata_const*8 (~)
3303 | subfic TMP1, TMP1, -4
3305 | lwzx TMP0, KBASE, TMP1 // KBASE-4-cdata_const*4
3306 | li TMP2, LJ_TCDATA
3307 | stwux TMP2, RA, BASE
3313 | // RA = dst*8, RD = int16_literal*8
3318 | stwux TISNUM, RA, BASE
3322 | // The soft-float approach is faster.
3324 | srawi TMP1, RD, 31
3325 | xor TMP2, TMP1, RD
3326 | sub TMP2, TMP2, TMP1 // TMP2 = abs(x)
3328 | subfic TMP1, TMP3, 0x40d // TMP1 = exponent-1
3329 | slw TMP2, TMP2, TMP3 // TMP2 = left aligned mantissa
3330 | subfic TMP3, RD, 0
3331 | slwi TMP1, TMP1, 20
3332 | rlwimi RD, TMP2, 21, 1, 31 // hi = sign(x) | (mantissa>>11)
3333 | subfe TMP0, TMP0, TMP0
3334 | add RD, RD, TMP1 // hi = hi + exponent-1
3335 | and RD, RD, TMP0 // hi = x == 0 ? 0 : hi
3337 | stwux RD, RA, BASE
3343 | // RA = dst*8, RD = num_const*8
3345 | lfdx f0, KBASE, RD
3346 | stfdx f0, BASE, RA
3350 | // RA = dst*8, RD = primitive_type*8 (~)
3354 | stwx TMP0, BASE, RA
3358 | // RA = base*8, RD = end*8
3359 | stwx TISNIL, BASE, RA
3362 | stwx TISNIL, BASE, RA
3369 /* -- Upvalue and function ops ------------------------------------------ */
3372 | // RA = dst*8, RD = uvnum*8
3373 | lwz LFUNC:RB, FRAME_FUNC(BASE)
3375 | addi RD, RD, offsetof(GCfuncL, uvptr)
3376 | lwzx UPVAL:RB, LFUNC:RB, RD
3378 | lwz TMP1, UPVAL:RB->v
3380 | stfdx f0, BASE, RA
3384 | // RA = uvnum*8, RD = src*8
3385 | lwz LFUNC:RB, FRAME_FUNC(BASE)
3387 | addi RA, RA, offsetof(GCfuncL, uvptr)
3388 | lfdux f0, RD, BASE
3389 | lwzx UPVAL:RB, LFUNC:RB, RA
3390 | lbz TMP3, UPVAL:RB->marked
3391 | lwz CARG2, UPVAL:RB->v
3392 | andi. TMP3, TMP3, LJ_GC_BLACK // isblack(uv)
3393 | lbz TMP0, UPVAL:RB->closed
3396 | cmplwi cr1, TMP0, 0
3398 | cror 4*cr0+eq, 4*cr0+eq, 4*cr1+eq
3399 | subi TMP2, TMP2, (LJ_TISNUM+1)
3400 | bne >2 // Upvalue is closed and black?
3404 |2: // Check if new value is collectable.
3405 | cmplwi TMP2, LJ_TISGCV - (LJ_TISNUM+1)
3406 | bge <1 // tvisgcv(v)
3407 | lbz TMP3, GCOBJ:TMP1->gch.marked
3408 | andi. TMP3, TMP3, LJ_GC_WHITES // iswhite(v)
3409 | la CARG1, GG_DISP2G(DISPATCH)
3410 | // Crossed a write barrier. Move the barrier forward.
3412 | bl extern lj_gc_barrieruv // (global_State *g, TValue *tv)
3416 | // RA = uvnum*8, RD = str_const*8 (~)
3417 | lwz LFUNC:RB, FRAME_FUNC(BASE)
3420 | subfic TMP1, TMP1, -4
3421 | addi RA, RA, offsetof(GCfuncL, uvptr)
3422 | lwzx STR:TMP1, KBASE, TMP1 // KBASE-4-str_const*4
3423 | lwzx UPVAL:RB, LFUNC:RB, RA
3424 | lbz TMP3, UPVAL:RB->marked
3425 | lwz CARG2, UPVAL:RB->v
3426 | andi. TMP3, TMP3, LJ_GC_BLACK // isblack(uv)
3427 | lbz TMP3, STR:TMP1->marked
3428 | lbz TMP2, UPVAL:RB->closed
3430 | stw STR:TMP1, 4(CARG2)
3431 | stw TMP0, 0(CARG2)
3436 |2: // Check if string is white and ensure upvalue is closed.
3437 | andi. TMP3, TMP3, LJ_GC_WHITES // iswhite(str)
3438 | cmplwi cr1, TMP2, 0
3439 | cror 4*cr0+eq, 4*cr0+eq, 4*cr1+eq
3440 | la CARG1, GG_DISP2G(DISPATCH)
3441 | // Crossed a write barrier. Move the barrier forward.
3443 | bl extern lj_gc_barrieruv // (global_State *g, TValue *tv)
3447 | // RA = uvnum*8, RD = num_const*8
3448 | lwz LFUNC:RB, FRAME_FUNC(BASE)
3450 | addi RA, RA, offsetof(GCfuncL, uvptr)
3451 | lfdx f0, KBASE, RD
3452 | lwzx UPVAL:RB, LFUNC:RB, RA
3454 | lwz TMP1, UPVAL:RB->v
3459 | // RA = uvnum*8, RD = primitive_type*8 (~)
3460 | lwz LFUNC:RB, FRAME_FUNC(BASE)
3463 | addi RA, RA, offsetof(GCfuncL, uvptr)
3465 | lwzx UPVAL:RB, LFUNC:RB, RA
3467 | lwz TMP1, UPVAL:RB->v
3473 | // RA = level*8, RD = target
3474 | lwz TMP1, L->openupval
3475 | branch_RD // Do this first since RD is not saved.
3480 | add CARG2, BASE, RA
3481 | bl extern lj_func_closeuv // (lua_State *L, TValue *level)
3488 | // RA = dst*8, RD = proto_const*8 (~) (holding function prototype)
3491 | subfic TMP1, TMP1, -4
3493 | lwzx CARG2, KBASE, TMP1 // KBASE-4-tab_const*4
3495 | lwz CARG3, FRAME_FUNC(BASE)
3496 | // (lua_State *L, GCproto *pt, GCfuncL *parent)
3497 | bl extern lj_func_newL_gc
3498 | // Returns GCfuncL *.
3501 | stwux TMP0, RA, BASE
3502 | stw LFUNC:CRET1, 4(RA)
3506 /* -- Table ops --------------------------------------------------------- */
3510 | // RA = dst*8, RD = (hbits|asize)*8 | tab_const*8 (~)
3511 | lwz TMP0, DISPATCH_GL(gc.total)(DISPATCH)
3513 | lwz TMP1, DISPATCH_GL(gc.threshold)(DISPATCH)
3519 if (op == BC_TNEW) {
3520 | rlwinm CARG2, RD, 29, 21, 31
3521 | rlwinm CARG3, RD, 18, 27, 31
3522 | cmpwi CARG2, 0x7ff; beq >3
3524 | bl extern lj_tab_new // (lua_State *L, int32_t asize, uint32_t hbits)
3525 | // Returns Table *.
3528 | subfic TMP1, TMP1, -4
3529 | lwzx CARG2, KBASE, TMP1 // KBASE-4-tab_const*4
3530 | bl extern lj_tab_dup // (lua_State *L, Table *kt)
3531 | // Returns Table *.
3535 | stwux TMP0, RA, BASE
3536 | stw TAB:CRET1, 4(RA)
3538 if (op == BC_TNEW) {
3545 | bl extern lj_gc_step_fixtop // (lua_State *L)
3552 | // RA = dst*8, RD = str_const*8 (~)
3554 | // RA = src*8, RD = str_const*8 (~)
3555 | lwz LFUNC:TMP2, FRAME_FUNC(BASE)
3557 | lwz TAB:RB, LFUNC:TMP2->env
3558 | subfic TMP1, TMP1, -4
3559 | lwzx STR:RC, KBASE, TMP1 // KBASE-4-str_const*4
3560 if (op == BC_GGET) {
3568 | // RA = dst*8, RB = table*8, RC = key*8
3569 | lwzux CARG1, RB, BASE
3570 | lwzux CARG2, RC, BASE
3578 | checknum cr1, CARG2
3581 | lwz TMP0, TAB:RB->asize
3583 | lwz TMP1, TAB:RB->array
3588 | // Convert number key to integer, check for integerness and range.
3590 | fadd f2, f0, TOBIT
3592 | lwz TMP0, TAB:RB->asize
3593 | fsub f2, f2, TOBIT
3595 | lwz TMP1, TAB:RB->array
3597 | cmplw cr0, TMP0, TMP2
3598 | crand 4*cr0+gt, 4*cr0+gt, 4*cr1+eq
3599 | slwi TMP2, TMP2, 3
3601 | ble ->vmeta_tgetv // Integer key and in array part?
3602 | lwzx TMP0, TMP1, TMP2
3603 | lfdx f14, TMP1, TMP2
3604 | checknil TMP0; beq >2
3607 | stfdx f14, BASE, RA
3610 |2: // Check for __index if table value is nil.
3611 | lwz TAB:TMP2, TAB:RB->metatable
3612 | cmplwi TAB:TMP2, 0
3613 | beq <1 // No metatable: done.
3614 | lbz TMP0, TAB:TMP2->nomm
3615 | andi. TMP0, TMP0, 1<<MM_index
3616 | bne <1 // 'no __index' flag set: done.
3620 | checkstr CARG2; bne ->vmeta_tgetv
3624 | b ->BC_TGETS_Z // String key?
3627 | // RA = dst*8, RB = table*8, RC = str_const*8 (~)
3628 | lwzux CARG1, RB, BASE
3631 | subfic TMP1, TMP1, -4
3633 | lwzx STR:RC, KBASE, TMP1 // KBASE-4-str_const*4
3634 | bne ->vmeta_tgets1
3636 | // TAB:RB = GCtab *, STR:RC = GCstr *, RA = dst*8
3637 | lwz TMP0, TAB:RB->hmask
3638 | lwz TMP1, STR:RC->hash
3639 | lwz NODE:TMP2, TAB:RB->node
3640 | and TMP1, TMP1, TMP0 // idx = str->hash & tab->hmask
3641 | slwi TMP0, TMP1, 5
3642 | slwi TMP1, TMP1, 3
3643 | sub TMP1, TMP0, TMP1
3644 | add NODE:TMP2, NODE:TMP2, TMP1 // node = tab->node + (idx*32-idx*8)
3646 | lwz CARG1, NODE:TMP2->key
3647 | lwz TMP0, 4+offsetof(Node, key)(NODE:TMP2)
3648 | lwz CARG2, NODE:TMP2->val
3649 | lwz TMP1, 4+offsetof(Node, val)(NODE:TMP2)
3650 | checkstr CARG1; bne >4
3651 | cmpw TMP0, STR:RC; bne >4
3652 | checknil CARG2; beq >5 // Key found, but nil value?
3654 | stwux CARG2, RA, BASE
3658 |4: // Follow hash chain.
3659 | lwz NODE:TMP2, NODE:TMP2->next
3660 | cmplwi NODE:TMP2, 0
3662 | // End of hash chain: key not found, nil result.
3665 |5: // Check for __index if table value is nil.
3666 | lwz TAB:TMP2, TAB:RB->metatable
3667 | cmplwi TAB:TMP2, 0
3668 | beq <3 // No metatable: done.
3669 | lbz TMP0, TAB:TMP2->nomm
3670 | andi. TMP0, TMP0, 1<<MM_index
3671 | bne <3 // 'no __index' flag set: done.
3675 | // RA = dst*8, RB = table*8, RC = index*8
3676 | lwzux CARG1, RB, BASE
3679 | checktab CARG1; bne ->vmeta_tgetb
3680 | lwz TMP1, TAB:RB->asize
3681 | lwz TMP2, TAB:RB->array
3682 | cmplw TMP0, TMP1; bge ->vmeta_tgetb
3683 | lwzx TMP1, TMP2, RC
3685 | checknil TMP1; beq >5
3688 | stfdx f0, BASE, RA
3691 |5: // Check for __index if table value is nil.
3692 | lwz TAB:TMP2, TAB:RB->metatable
3693 | cmplwi TAB:TMP2, 0
3694 | beq <1 // No metatable: done.
3695 | lbz TMP2, TAB:TMP2->nomm
3696 | andi. TMP2, TMP2, 1<<MM_index
3697 | bne <1 // 'no __index' flag set: done.
3698 | b ->vmeta_tgetb // Caveat: preserve TMP0!
3702 | // RA = src*8, RB = table*8, RC = key*8
3703 | lwzux CARG1, RB, BASE
3704 | lwzux CARG2, RC, BASE
3712 | checknum cr1, CARG2
3715 | lwz TMP0, TAB:RB->asize
3717 | lwz TMP1, TAB:RB->array
3722 | // Convert number key to integer, check for integerness and range.
3724 | fadd f2, f0, TOBIT
3726 | lwz TMP0, TAB:RB->asize
3727 | fsub f2, f2, TOBIT
3729 | lwz TMP1, TAB:RB->array
3731 | cmplw cr0, TMP0, TMP2
3732 | crand 4*cr0+gt, 4*cr0+gt, 4*cr1+eq
3733 | slwi TMP0, TMP2, 3
3735 | ble ->vmeta_tsetv // Integer key and in array part?
3736 | lwzx TMP2, TMP1, TMP0
3737 | lbz TMP3, TAB:RB->marked
3738 | lfdx f14, BASE, RA
3739 | checknil TMP2; beq >3
3741 | andi. TMP2, TMP3, LJ_GC_BLACK // isblack(table)
3742 | stfdx f14, TMP1, TMP0
3747 |3: // Check for __newindex if previous value is nil.
3748 | lwz TAB:TMP2, TAB:RB->metatable
3749 | cmplwi TAB:TMP2, 0
3750 | beq <1 // No metatable: done.
3751 | lbz TMP2, TAB:TMP2->nomm
3752 | andi. TMP2, TMP2, 1<<MM_newindex
3753 | bne <1 // 'no __newindex' flag set: done.
3757 | checkstr CARG2; bne ->vmeta_tsetv
3761 | b ->BC_TSETS_Z // String key?
3763 |7: // Possible table write barrier for the value. Skip valiswhite check.
3764 | barrierback TAB:RB, TMP3, TMP0
3768 | checkstr CARG1; bne >4
3769 | cmpw TMP0, STR:RC; bne >4
3770 | checknil CARG2; beq >5 // Key found, but nil value?
3772 | stwux CARG2, RA, BASE
3776 | // RA = src*8, RB = table*8, RC = str_const*8 (~)
3777 | lwzux CARG1, RB, BASE
3780 | subfic TMP1, TMP1, -4
3782 | lwzx STR:RC, KBASE, TMP1 // KBASE-4-str_const*4
3783 | bne ->vmeta_tsets1
3785 | // TAB:RB = GCtab *, STR:RC = GCstr *, RA = src*8
3786 | lwz TMP0, TAB:RB->hmask
3787 | lwz TMP1, STR:RC->hash
3788 | lwz NODE:TMP2, TAB:RB->node
3789 | stb ZERO, TAB:RB->nomm // Clear metamethod cache.
3790 | and TMP1, TMP1, TMP0 // idx = str->hash & tab->hmask
3791 | lfdx f14, BASE, RA
3792 | slwi TMP0, TMP1, 5
3793 | slwi TMP1, TMP1, 3
3794 | sub TMP1, TMP0, TMP1
3795 | lbz TMP3, TAB:RB->marked
3796 | add NODE:TMP2, NODE:TMP2, TMP1 // node = tab->node + (idx*32-idx*8)
3798 | lwz CARG1, NODE:TMP2->key
3799 | lwz TMP0, 4+offsetof(Node, key)(NODE:TMP2)
3800 | lwz CARG2, NODE:TMP2->val
3801 | lwz TMP1, 4+offsetof(Node, val)(NODE:TMP2)
3802 | checkstr CARG1; bne >5
3803 | cmpw TMP0, STR:RC; bne >5
3804 | checknil CARG2; beq >4 // Key found, but nil value?
3806 | andi. TMP0, TMP3, LJ_GC_BLACK // isblack(table)
3807 | stfd f14, NODE:TMP2->val
3812 |4: // Check for __newindex if previous value is nil.
3813 | lwz TAB:TMP1, TAB:RB->metatable
3814 | cmplwi TAB:TMP1, 0
3815 | beq <2 // No metatable: done.
3816 | lbz TMP0, TAB:TMP1->nomm
3817 | andi. TMP0, TMP0, 1<<MM_newindex
3818 | bne <2 // 'no __newindex' flag set: done.
3821 |5: // Follow hash chain.
3822 | lwz NODE:TMP2, NODE:TMP2->next
3823 | cmplwi NODE:TMP2, 0
3825 | // End of hash chain: key not found, add a new one.
3827 | // But check for __newindex first.
3828 | lwz TAB:TMP1, TAB:RB->metatable
3829 | la CARG3, DISPATCH_GL(tmptv)(DISPATCH)
3832 | cmplwi TAB:TMP1, 0
3834 | beq >6 // No metatable: continue.
3835 | lbz TMP0, TAB:TMP1->nomm
3836 | andi. TMP0, TMP0, 1<<MM_newindex
3837 | beq ->vmeta_tsets // 'no __newindex' flag NOT set: check.
3840 | stw STR:RC, 4(CARG3)
3842 | stw TMP0, 0(CARG3)
3843 | bl extern lj_tab_newkey // (lua_State *L, GCtab *t, TValue *k)
3844 | // Returns TValue *.
3846 | stfd f14, 0(CRET1)
3847 | b <3 // No 2nd write barrier needed.
3849 |7: // Possible table write barrier for the value. Skip valiswhite check.
3850 | barrierback TAB:RB, TMP3, TMP0
3854 | // RA = src*8, RB = table*8, RC = index*8
3855 | lwzux CARG1, RB, BASE
3858 | checktab CARG1; bne ->vmeta_tsetb
3859 | lwz TMP1, TAB:RB->asize
3860 | lwz TMP2, TAB:RB->array
3861 | lbz TMP3, TAB:RB->marked
3863 | lfdx f14, BASE, RA
3865 | lwzx TMP1, TMP2, RC
3866 | checknil TMP1; beq >5
3868 | andi. TMP0, TMP3, LJ_GC_BLACK // isblack(table)
3869 | stfdx f14, TMP2, RC
3874 |5: // Check for __newindex if previous value is nil.
3875 | lwz TAB:TMP1, TAB:RB->metatable
3876 | cmplwi TAB:TMP1, 0
3877 | beq <1 // No metatable: done.
3878 | lbz TMP1, TAB:TMP1->nomm
3879 | andi. TMP1, TMP1, 1<<MM_newindex
3880 | bne <1 // 'no __newindex' flag set: done.
3881 | b ->vmeta_tsetb // Caveat: preserve TMP0!
3883 |7: // Possible table write barrier for the value. Skip valiswhite check.
3884 | barrierback TAB:RB, TMP3, TMP0
3889 | // RA = base*8 (table at base-1), RD = num_const*8 (start index)
3892 | add TMP3, KBASE, RD
3893 | lwz TAB:CARG2, -4(RA) // Guaranteed to be a table.
3894 | addic. TMP0, MULTRES, -8
3895 | lwz TMP3, 4(TMP3) // Integer constant is in lo-word.
3896 | srwi CARG3, TMP0, 3
3897 | beq >4 // Nothing to copy?
3898 | add CARG3, CARG3, TMP3
3899 | lwz TMP2, TAB:CARG2->asize
3900 | slwi TMP1, TMP3, 3
3901 | lbz TMP3, TAB:CARG2->marked
3903 | add TMP2, RA, TMP0
3904 | lwz TMP0, TAB:CARG2->array
3906 | add TMP1, TMP1, TMP0
3907 | andi. TMP0, TMP3, LJ_GC_BLACK // isblack(table)
3908 |3: // Copy result slots to table.
3911 | cmpw cr1, RA, TMP2
3913 | addi TMP1, TMP1, 8
3919 |5: // Need to resize array part.
3924 | bl extern lj_tab_reasize // (lua_State *L, GCtab *t, int nasize)
3925 | // Must not reallocate the stack.
3929 |7: // Possible table write barrier for any value. Skip valiswhite check.
3930 | barrierback TAB:CARG2, TMP3, TMP0
3934 /* -- Calls and vararg handling ----------------------------------------- */
3937 | // RA = base*8, (RB = (nresults+1)*8,) RC = extra_nargs*8
3938 | add NARGS8:RC, NARGS8:RC, MULTRES
3939 | // Fall through. Assumes BC_CALL follows.
3942 | // RA = base*8, (RB = (nresults+1)*8,) RC = (nargs+1)*8
3944 | lwzux TMP0, BASE, RA
3945 | lwz LFUNC:RB, 4(BASE)
3946 | subi NARGS8:RC, NARGS8:RC, 8
3947 | addi BASE, BASE, 8
3948 | checkfunc TMP0; bne ->vmeta_call
3953 | // RA = base*8, (RB = 0,) RC = extra_nargs*8
3954 | add NARGS8:RC, NARGS8:RC, MULTRES
3955 | // Fall through. Assumes BC_CALLT follows.
3958 | // RA = base*8, (RB = 0,) RC = (nargs+1)*8
3959 | lwzux TMP0, RA, BASE
3960 | lwz LFUNC:RB, 4(RA)
3961 | subi NARGS8:RC, NARGS8:RC, 8
3962 | lwz TMP1, FRAME_PC(BASE)
3967 | andi. TMP0, TMP1, FRAME_TYPE // Caveat: preserve cr0 until the crand.
3968 | lbz TMP3, LFUNC:RB->ffid
3969 | xori TMP2, TMP1, FRAME_VARG
3970 | cmplwi cr1, NARGS8:RC, 0
3973 | stw LFUNC:RB, FRAME_FUNC(BASE) // Copy function down, but keep PC.
3975 | cmplwi cr7, TMP3, 1 // (> FF_C) Calling a fast function?
3978 | addi TMP3, TMP2, 8
3980 | cmplw cr1, TMP3, NARGS8:RC
3981 | stfdx f0, BASE, TMP2
3985 | crand 4*cr0+eq, 4*cr0+eq, 4*cr7+gt
3990 |5: // Tailcall to a fast function with a Lua frame below.
3992 | decode_RA8 RA, INS
3993 | sub TMP1, BASE, RA
3994 | lwz LFUNC:TMP1, FRAME_FUNC-8(TMP1)
3995 | lwz TMP1, LFUNC:TMP1->pc
3996 | lwz KBASE, PC2PROTO(k)(TMP1) // Need to prepare KBASE.
3999 |7: // Tailcall from a vararg function.
4000 | andi. TMP0, TMP2, FRAME_TYPEP
4001 | bne <1 // Vararg frame below?
4002 | sub BASE, BASE, TMP2 // Relocate BASE down.
4003 | lwz TMP1, FRAME_PC(BASE)
4004 | andi. TMP0, TMP1, FRAME_TYPE
4009 | // RA = base*8, (RB = (nresults+1)*8, RC = (nargs+1)*8 ((2+1)*8))
4011 | add BASE, BASE, RA
4012 | lwz TMP1, -24(BASE)
4013 | lwz LFUNC:RB, -20(BASE)
4016 | stw TMP1, 0(BASE) // Copy callable.
4017 | stw LFUNC:RB, 4(BASE)
4019 | stfd f1, 16(BASE) // Copy control var.
4020 | li NARGS8:RC, 16 // Iterators get 2 arguments.
4021 | stfdu f0, 8(BASE) // Copy state.
4027 | // RA = base*8, (RB = (nresults+1)*8, RC = (nargs+1)*8 (2+1)*8)
4029 | // NYI: add hotloop, record BC_ITERN.
4032 | lwz TAB:RB, -12(RA)
4033 | lwz RC, -4(RA) // Get index from control var.
4034 | lwz TMP0, TAB:RB->asize
4035 | lwz TMP1, TAB:RB->array
4037 |1: // Traverse array part.
4040 | bge >5 // Index points after array part?
4041 | lwzx TMP2, TMP1, TMP3
4042 | lfdx f0, TMP1, TMP3
4053 | addis TMP3, PC, -(BCBIAS_J*4 >> 16)
4055 | decode_RD4 TMP1, INS
4056 | stw RC, -4(RA) // Update control var.
4057 | add PC, TMP1, TMP3
4064 |4: // Skip holes in array part.
4068 |5: // Traverse hash part.
4069 | lwz TMP1, TAB:RB->hmask
4071 | lwz TMP2, TAB:RB->node
4073 | cmplw RC, TMP1 // End of iteration? Branch to ITERL+1.
4077 | sub TMP3, TMP3, RB
4078 | lwzx RB, TMP2, TMP3
4079 | lfdx f0, TMP2, TMP3
4080 | add NODE:TMP3, TMP2, TMP3
4084 | lfd f1, NODE:TMP3->key
4085 | addis TMP2, PC, -(BCBIAS_J*4 >> 16)
4088 | decode_RD4 TMP1, INS
4091 | add PC, TMP1, TMP2
4092 | stw RC, -4(RA) // Update control var.
4095 |7: // Skip holes in hash part.
4101 | // RA = base*8, RD = target (points to ITERN)
4104 | lwz CFUNC:TMP1, -20(RA)
4107 | cmpwi cr0, TMP2, LJ_TTAB
4108 | cmpwi cr1, TMP0, LJ_TFUNC
4109 | cmpwi cr6, TMP3, LJ_TNIL
4111 | lbz TMP1, CFUNC:TMP1->ffid
4112 | crand 4*cr0+eq, 4*cr0+eq, 4*cr6+eq
4113 | cmpwi cr7, TMP1, FF_next_N
4115 | crand 4*cr0+eq, 4*cr0+eq, 4*cr7+eq
4116 | add TMP3, PC, TMP0
4118 | stw ZERO, -4(RA) // Initialize control var.
4119 | addis PC, TMP3, -(BCBIAS_J*4 >> 16)
4122 |5: // Despecialize bytecode if any of the checks fail.
4126 | addis PC, TMP3, -(BCBIAS_J*4 >> 16)
4132 | // RA = base*8, RB = (nresults+1)*8, RC = numparams*8
4133 | lwz TMP0, FRAME_PC(BASE)
4136 | addi RC, RC, FRAME_VARG
4138 | subi TMP3, BASE, 8 // TMP3 = vtop
4139 | sub RC, RC, TMP0 // RC = vbase
4140 | // Note: RC may now be even _above_ BASE if nargs was < numparams.
4142 | sub. TMP1, TMP3, RC
4143 | beq cr1, >5 // Copy all varargs?
4144 | subi TMP2, TMP2, 16
4145 | ble >2 // No vararg slots?
4146 |1: // Copy vararg slots to destination slots.
4151 | cmplw cr1, RC, TMP3
4152 | bge >3 // All destination slots filled?
4154 | blt cr1, <1 // More vararg slots?
4155 |2: // Fill up remainder with nil.
4163 |5: // Copy all varargs.
4164 | lwz TMP0, L->maxstack
4165 | li MULTRES, 8 // MULTRES = (0+1)*8
4166 | bley <3 // No vararg slots?
4167 | add TMP2, RA, TMP1
4169 | addi MULTRES, TMP1, 8
4177 | blt <6 // More vararg slots?
4180 |7: // Grow stack for varargs.
4183 | sub SAVE0, RC, BASE // Need delta, because BASE may change.
4187 | srwi CARG2, TMP1, 3
4188 | bl extern lj_state_growstack // (lua_State *L, int n)
4191 | add RC, BASE, SAVE0
4192 | subi TMP3, BASE, 8
4196 /* -- Returns ----------------------------------------------------------- */
4199 | // RA = results*8, RD = extra_nresults*8
4200 | add RD, RD, MULTRES // MULTRES >= 8, so RD >= 8.
4201 | // Fall through. Assumes BC_RET follows.
4205 | // RA = results*8, RD = (nresults+1)*8
4206 | lwz PC, FRAME_PC(BASE)
4210 | andi. TMP0, PC, FRAME_TYPE
4211 | xori TMP1, PC, FRAME_VARG
4215 | // BASE = base, RA = resultptr, RD = (nresults+1)*8, PC = return
4218 | subi TMP2, BASE, 8
4220 | decode_RB8 RB, INS
4224 | addi TMP3, TMP1, 8
4227 | stfdx f0, TMP2, TMP1
4229 | addi TMP1, TMP3, 8
4232 | stfdx f1, TMP2, TMP3
4237 | decode_RA8 RA, INS
4239 | sub BASE, TMP2, RA
4240 | lwz LFUNC:TMP1, FRAME_FUNC(BASE)
4242 | lwz TMP1, LFUNC:TMP1->pc
4243 | lwz KBASE, PC2PROTO(k)(TMP1)
4246 |6: // Fill up results with nil.
4249 | stwx TISNIL, TMP2, TMP1
4252 |->BC_RETV_Z: // Non-standard return case.
4253 | andi. TMP2, TMP1, FRAME_TYPEP
4255 | // Return from vararg function: relocate BASE down.
4256 | sub BASE, BASE, TMP1
4257 | lwz PC, FRAME_PC(BASE)
4261 case BC_RET0: case BC_RET1:
4262 | // RA = results*8, RD = (nresults+1)*8
4263 | lwz PC, FRAME_PC(BASE)
4266 | andi. TMP0, PC, FRAME_TYPE
4267 | xori TMP1, PC, FRAME_VARG
4271 | subi TMP2, BASE, 8
4272 | decode_RB8 RB, INS
4273 if (op == BC_RET1) {
4279 | decode_RA8 RA, INS
4281 | sub BASE, TMP2, RA
4282 | lwz LFUNC:TMP1, FRAME_FUNC(BASE)
4284 | lwz TMP1, LFUNC:TMP1->pc
4285 | lwz KBASE, PC2PROTO(k)(TMP1)
4288 |6: // Fill up results with nil.
4291 | stwx TISNIL, TMP2, TMP1
4295 /* -- Loops and branches ------------------------------------------------ */
4301 | // Fall through. Assumes BC_IFORL follows.
4311 | // RA = base*8, RD = target (after end of loop or start of loop)
4312 vk = (op == BC_IFORL || op == BC_JFORL);
4315 | lwzux TMP1, RA, BASE
4316 | lwz CARG1, FORL_IDX*8+4(RA)
4317 | cmplw cr0, TMP1, TISNUM
4319 | lwz CARG3, FORL_STEP*8+4(RA)
4321 | addo. CARG1, CARG1, CARG3
4322 | cmpwi cr6, CARG3, 0
4323 | lwz CARG2, FORL_STOP*8+4(RA)
4326 | stw CARG1, FORL_IDX*8+4(RA)
4328 | lwz TMP3, FORL_STEP*8(RA)
4329 | lwz CARG3, FORL_STEP*8+4(RA)
4330 | lwz TMP2, FORL_STOP*8(RA)
4331 | lwz CARG2, FORL_STOP*8+4(RA)
4332 | cmplw cr7, TMP3, TISNUM
4333 | cmplw cr1, TMP2, TISNUM
4334 | crand 4*cr0+eq, 4*cr0+eq, 4*cr7+eq
4335 | crand 4*cr0+eq, 4*cr0+eq, 4*cr1+eq
4336 | cmpwi cr6, CARG3, 0
4342 | stw TISNUM, FORL_EXT*8(RA)
4343 if (op != BC_JFORL) {
4346 | stw CARG1, FORL_EXT*8+4(RA)
4347 if (op != BC_JFORL) {
4350 if (op == BC_FORI) {
4351 | bgt >3 // See FP loop below.
4352 } else if (op == BC_JFORI) {
4353 | addis PC, RD, -(BCBIAS_J*4 >> 16)
4355 } else if (op == BC_IFORL) {
4357 | addis PC, RD, -(BCBIAS_J*4 >> 16)
4363 |5: // Invert check for negative step.
4367 |6: // Potential overflow.
4368 | mcrxr cr0; bley <4 // Ignore unrelated overflow.
4375 | lfd f1, FORL_IDX*8(RA)
4377 | lfdux f1, RA, BASE
4379 | lfd f3, FORL_STEP*8(RA)
4380 | lfd f2, FORL_STOP*8(RA)
4381 | lwz TMP3, FORL_STEP*8(RA)
4383 | stfd f1, FORL_IDX*8(RA)
4388 | lwzux TMP1, RA, BASE
4389 | lwz TMP3, FORL_STEP*8(RA)
4390 | lwz TMP2, FORL_STOP*8(RA)
4391 | cmplw cr0, TMP1, TISNUM
4392 | cmplw cr7, TMP3, TISNUM
4393 | cmplw cr1, TMP2, TISNUM
4395 | lfd f1, FORL_IDX*8(RA)
4396 | crand 4*cr0+lt, 4*cr0+lt, 4*cr7+lt
4397 | lfd f3, FORL_STEP*8(RA)
4398 | crand 4*cr0+lt, 4*cr0+lt, 4*cr1+lt
4399 | lfd f2, FORL_STOP*8(RA)
4402 | cmpwi cr6, TMP3, 0
4403 if (op != BC_JFORL) {
4406 | stfd f1, FORL_EXT*8(RA)
4407 if (op != BC_JFORL) {
4411 if (op == BC_JFORI) {
4412 | addis PC, RD, -(BCBIAS_J*4 >> 16)
4415 if (op == BC_FORI) {
4417 } else if (op == BC_IFORL) {
4424 | addis PC, RD, -(BCBIAS_J*4 >> 16)
4425 } else if (op == BC_JFORI) {
4436 |5: // Negative step.
4437 if (op == BC_FORI) {
4439 |3: // Used by integer loop, too.
4440 | addis PC, RD, -(BCBIAS_J*4 >> 16)
4441 } else if (op == BC_IFORL) {
4443 } else if (op == BC_JFORI) {
4449 if (op == BC_JFORI) {
4452 | decode_RD8 RD, INS
4461 | // Fall through. Assumes BC_IITERL follows.
4469 | // RA = base*8, RD = target
4470 | lwzux TMP1, RA, BASE
4472 | checknil TMP1; beq >1 // Stop if iterator returned nil.
4473 if (op == BC_JITERL) {
4478 | branch_RD // Otherwise save control var + branch.
4487 | // RA = base*8, RD = target (loop extent)
4488 | // Note: RA/RD is only used by trace recorder to determine scope/extent
4489 | // This opcode does NOT jump, it's only purpose is to detect a hot loop.
4493 | // Fall through. Assumes BC_ILOOP follows.
4497 | // RA = base*8, RD = target (loop extent)
4503 | // RA = base*8 (ignored), RD = traceno*8
4504 | lwz TMP1, DISPATCH_J(trace)(DISPATCH)
4506 | // Traces on PPC don't store the trace number, so use 0.
4507 | stw ZERO, DISPATCH_GL(vmstate)(DISPATCH)
4508 | lwzx TRACE:TMP2, TMP1, RD
4509 | mcrxr cr0 // Clear SO flag.
4510 | lwz TMP2, TRACE:TMP2->mcode
4511 | stw BASE, DISPATCH_GL(jit_base)(DISPATCH)
4513 | stw L, DISPATCH_GL(jit_L)(DISPATCH)
4514 | addi JGL, DISPATCH, GG_DISP2G+32768
4520 | // RA = base*8 (only used by trace recorder), RD = target
4525 /* -- Function headers -------------------------------------------------- */
4531 case BC_FUNCV: /* NYI: compiled vararg functions. */
4532 | // Fall through. Assumes BC_IFUNCF/BC_IFUNCV follow.
4540 | // BASE = new base, RA = BASE+framesize*8, RB = LFUNC, RC = nargs*8
4541 | lwz TMP2, L->maxstack
4542 | lbz TMP1, -4+PC2PROTO(numparams)(PC)
4543 | lwz KBASE, -4+PC2PROTO(k)(PC)
4545 | slwi TMP1, TMP1, 3
4546 | bgt ->vm_growstack_l
4547 if (op != BC_JFUNCF) {
4551 | cmplw NARGS8:RC, TMP1 // Check for missing parameters.
4553 if (op == BC_JFUNCF) {
4554 | decode_RD8 RD, INS
4560 |3: // Clear missing parameters.
4561 | stwx TISNIL, BASE, NARGS8:RC
4562 | addi NARGS8:RC, NARGS8:RC, 8
4570 | NYI // NYI: compiled vararg functions
4571 break; /* NYI: compiled vararg functions. */
4574 | // BASE = new base, RA = BASE+framesize*8, RB = LFUNC, RC = nargs*8
4575 | lwz TMP2, L->maxstack
4576 | add TMP1, BASE, RC
4578 | stw LFUNC:RB, 4(TMP1) // Store copy of LFUNC.
4579 | addi TMP3, RC, 8+FRAME_VARG
4580 | lwz KBASE, -4+PC2PROTO(k)(PC)
4582 | stw TMP3, 0(TMP1) // Store delta + FRAME_VARG.
4583 | bge ->vm_growstack_l
4584 | lbz TMP2, -4+PC2PROTO(numparams)(PC)
4589 | addi BASE, TMP1, 8
4592 | cmplw RA, RC // Less args than parameters?
4596 | stw TISNIL, 0(RA) // Clear old fixarg slot (help the GC).
4599 | addic. TMP2, TMP2, -1
4601 | stw TMP3, 12(TMP1)
4602 | addi TMP1, TMP1, 8
4607 |4: // Clear missing parameters.
4614 | // BASE = new base, RA = BASE+framesize*8, RB = CFUNC, RC = nargs*8
4615 if (op == BC_FUNCC) {
4616 | lwz TMP3, CFUNC:RB->f
4618 | lwz TMP3, DISPATCH_GL(wrapf)(DISPATCH)
4620 | add TMP1, RA, NARGS8:RC
4621 | lwz TMP2, L->maxstack
4622 | add RC, BASE, NARGS8:RC
4628 if (op == BC_FUNCCW) {
4629 | lwz CARG2, CFUNC:RB->f
4632 | bgt ->vm_growstack_c // Need to grow stack.
4634 | bctrl // (lua_State *L [, lua_CFunction f])
4635 | // Returns nresults.
4640 | lwz PC, FRAME_PC(BASE) // Fetch PC of caller.
4641 | sub RA, TMP1, RD // RA = L->top - nresults*8
4646 /* ---------------------------------------------------------------------- */
4649 fprintf(stderr, "Error: undefined opcode BC_%s\n", bc_names[op]);
4655 static int build_backend(BuildCtx *ctx)
4659 dasm_growpc(Dst, BC__MAX);
4661 build_subroutines(ctx);
4664 for (op = 0; op < BC__MAX; op++)
4665 build_ins(ctx, (BCOp)op, op);
4670 /* Emit pseudo frame-info for all assembler functions. */
4671 static void emit_asm_debug(BuildCtx *ctx)
4673 int fcofs = (int)((uint8_t *)ctx->glob[GLOB_vm_ffi_call] - ctx->code);
4675 switch (ctx->mode) {
4677 fprintf(ctx->fp, "\t.section .debug_frame,\"\",@progbits\n");
4680 "\t.long .LECIE0-.LSCIE0\n"
4682 "\t.long 0xffffffff\n"
4688 "\t.byte 0xc\n\t.uleb128 1\n\t.uleb128 0\n"
4693 "\t.long .LEFDE0-.LASFDE0\n"
4695 "\t.long .Lframe0\n"
4698 "\t.byte 0xe\n\t.uleb128 %d\n"
4699 "\t.byte 0x11\n\t.uleb128 65\n\t.sleb128 -1\n"
4700 "\t.byte 0x5\n\t.uleb128 70\n\t.uleb128 55\n",
4701 fcofs, CFRAME_SIZE);
4702 for (i = 14; i <= 31; i++)
4704 "\t.byte %d\n\t.uleb128 %d\n"
4705 "\t.byte %d\n\t.uleb128 %d\n",
4706 0x80+i, 37+(31-i), 0x80+32+i, 2+2*(31-i));
4713 "\t.long .LEFDE1-.LASFDE1\n"
4715 "\t.long .Lframe0\n"
4716 "\t.long lj_vm_ffi_call\n"
4718 "\t.byte 0x11\n\t.uleb128 65\n\t.sleb128 -1\n"
4719 "\t.byte 0x8e\n\t.uleb128 2\n"
4720 "\t.byte 0xd\n\t.uleb128 0xe\n"
4722 ".LEFDE1:\n\n", (int)ctx->codesz - fcofs);
4724 fprintf(ctx->fp, "\t.section .eh_frame,\"a\",@progbits\n");
4727 "\t.long .LECIE1-.LSCIE1\n"
4731 "\t.string \"zPR\"\n"
4735 "\t.uleb128 6\n" /* augmentation length */
4736 "\t.byte 0x1b\n" /* pcrel|sdata4 */
4737 "\t.long lj_err_unwind_dwarf-.\n"
4738 "\t.byte 0x1b\n" /* pcrel|sdata4 */
4739 "\t.byte 0xc\n\t.uleb128 1\n\t.uleb128 0\n"
4744 "\t.long .LEFDE2-.LASFDE2\n"
4746 "\t.long .LASFDE2-.Lframe1\n"
4747 "\t.long .Lbegin-.\n"
4749 "\t.uleb128 0\n" /* augmentation length */
4750 "\t.byte 0xe\n\t.uleb128 %d\n"
4751 "\t.byte 0x11\n\t.uleb128 65\n\t.sleb128 -1\n"
4752 "\t.byte 0x5\n\t.uleb128 70\n\t.uleb128 55\n",
4753 fcofs, CFRAME_SIZE);
4754 for (i = 14; i <= 31; i++)
4756 "\t.byte %d\n\t.uleb128 %d\n"
4757 "\t.byte %d\n\t.uleb128 %d\n",
4758 0x80+i, 37+(31-i), 0x80+32+i, 2+2*(31-i));
4765 "\t.long .LECIE2-.LSCIE2\n"
4769 "\t.string \"zR\"\n"
4773 "\t.uleb128 1\n" /* augmentation length */
4774 "\t.byte 0x1b\n" /* pcrel|sdata4 */
4775 "\t.byte 0xc\n\t.uleb128 1\n\t.uleb128 0\n"
4780 "\t.long .LEFDE3-.LASFDE3\n"
4782 "\t.long .LASFDE3-.Lframe2\n"
4783 "\t.long lj_vm_ffi_call-.\n"
4785 "\t.uleb128 0\n" /* augmentation length */
4786 "\t.byte 0x11\n\t.uleb128 65\n\t.sleb128 -1\n"
4787 "\t.byte 0x8e\n\t.uleb128 2\n"
4788 "\t.byte 0xd\n\t.uleb128 0xe\n"
4790 ".LEFDE3:\n\n", (int)ctx->codesz - fcofs);