1 |// Low-level VM code for PowerPC CPUs.
2 |// Bytecode interpreter, fast functions and helper functions.
3 |// Copyright (C) 2005-2014 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 |// DynASM defines used by the PPC port:
20 |// P64 64 bit pointers (only for GPR64 testing).
21 |// Note: a full PPC64 _LP64 port is not planned.
22 |// GPR64 64 bit registers (but possibly 32 bit pointers, e.g. PS3).
23 |// Affects reg saves, stack layout, carry/overflow/dot flags etc.
24 |// FRAME32 Use 32 bit frame layout, even with GPR64 (Xbox 360).
25 |// TOC Need table of contents (64 bit or 32 bit variant, e.g. PS3).
26 |// Function pointers are really a struct: code, TOC, env (optional).
27 |// TOCENV Function pointers have an environment pointer, too (not on PS3).
28 |// PPE Power Processor Element of Cell (PS3) or Xenon (Xbox 360).
29 |// Must avoid (slow) micro-coded instructions.
34 |.macro lpx, a, b, c; ldx a, b, c; .endmacro
35 |.macro lp, a, b; ld a, b; .endmacro
36 |.macro stp, a, b; std a, b; .endmacro
37 |.define decode_OPP, decode_OP8
39 |// Missing: Calling conventions, 64 bit regs, TOC.
40 |.error lib_ffi not yet implemented for PPC64
43 |.macro lpx, a, b, c; lwzx a, b, c; .endmacro
44 |.macro lp, a, b; lwz a, b; .endmacro
45 |.macro stp, a, b; stw a, b; .endmacro
46 |.define decode_OPP, decode_OP4
49 |// Convenience macros for TOC handling.
51 |// Linker needs a TOC patch area for every external call relocation.
52 |.macro blex, target; bl extern target@plt; nop; .endmacro
53 |.macro .toc, a, b; a, b; .endmacro
62 |.macro blex, target; bl extern target@plt; .endmacro
63 |.macro .toc, a, b; .endmacro
65 |.macro .tocenv, a, b; .if TOCENV; a, b; .endif; .endmacro
67 |.macro .gpr64, a, b; .if GPR64; a, b; .endif; .endmacro
69 |.macro andix., y, a, i
71 | rlwinm y, a, 0, 31-lj_fls(i), 31-lj_ffs(i)
87 |.macro checkov, reg, noov
101 |//-----------------------------------------------------------------------
103 |// Fixed register assignments for the interpreter.
104 |// Don't use: r1 = sp, r2 and r13 = reserved (TOC, TLS or SDATA)
106 |// The following must be C callee-save (but BASE is often refetched).
107 |.define BASE, r14 // Base of current Lua stack frame.
108 |.define KBASE, r15 // Constants of current Lua function.
109 |.define PC, r16 // Next PC.
110 |.define DISPATCH, r17 // Opcode dispatch table.
111 |.define LREG, r18 // Register holding lua_State (also in SAVE_L).
112 |.define MULTRES, r19 // Size of multi-result: (nresults+1)*8.
113 |.define JGL, r31 // On-trace: global_State + 32768.
115 |// Constants for type-comparisons, stores and conversions. C callee-save.
119 |.define TOBIT, f30 // 2^52 + 2^51.
120 |.define TONUM, f31 // 2^52 + 2^51 + 2^31.
122 |// The following temporaries are not saved across C calls, except for RA.
123 |.define RA, r20 // Callee-save.
127 |.define INS, r7 // Overlaps CARG5.
132 |.define TMP3, r6 // Overlaps CARG4.
134 |// Saved temporaries.
137 |// Calling conventions.
141 |.define CARG4, r6 // Overlaps TMP3.
142 |.define CARG5, r7 // Overlaps INS.
150 |.define TOCREG, r2 // TOC register (only used by C code).
151 |.define ENVREG, r11 // Environment pointer (nested C functions).
153 |// Stack layout while in interpreter. Must match with lj_frame.h.
157 |// 456(sp) // \ 32/64 bit C frame info
158 |.define TONUM_LO, 452(sp) // |
159 |.define TONUM_HI, 448(sp) // |
160 |.define TMPD_LO, 444(sp) // |
161 |.define TMPD_HI, 440(sp) // |
162 |.define SAVE_CR, 432(sp) // | 64 bit CR save.
163 |.define SAVE_ERRF, 424(sp) // > Parameter save area.
164 |.define SAVE_NRES, 420(sp) // |
165 |.define SAVE_L, 416(sp) // |
166 |.define SAVE_PC, 412(sp) // |
167 |.define SAVE_MULTRES, 408(sp) // |
168 |.define SAVE_CFRAME, 400(sp) // / 64 bit C frame chain.
169 |// 392(sp) // Reserved.
170 |.define CFRAME_SPACE, 384 // Delta for sp.
171 |// Back chain for sp: 384(sp) <-- sp entering interpreter
172 |.define SAVE_LR, 376(sp) // 32 bit LR stored in hi-part.
173 |.define SAVE_GPR_, 232 // .. 232+18*8: 64 bit GPR saves.
174 |.define SAVE_FPR_, 88 // .. 88+18*8: 64 bit FPR saves.
175 |// 80(sp) // Needed for 16 byte stack frame alignment.
176 |// 16(sp) // Callee parameter save area (ABI mandated).
177 |// 8(sp) // Reserved
178 |// Back chain for sp: 0(sp) <-- sp while in interpreter
179 |// 32 bit sp stored in hi-part of 0(sp).
181 |.define TMPD_BLO, 447(sp)
182 |.define TMPD, TMPD_HI
183 |.define TONUM_D, TONUM_HI
187 |// 508(sp) // \ 32 bit C frame info.
188 |.define SAVE_ERRF, 472(sp) // |
189 |.define SAVE_NRES, 468(sp) // |
190 |.define SAVE_L, 464(sp) // > Parameter save area.
191 |.define SAVE_PC, 460(sp) // |
192 |.define SAVE_MULTRES, 456(sp) // |
193 |.define SAVE_CFRAME, 448(sp) // / 64 bit C frame chain.
194 |.define SAVE_LR, 416(sp)
195 |.define CFRAME_SPACE, 400 // Delta for sp.
196 |// Back chain for sp: 400(sp) <-- sp entering interpreter
197 |.define SAVE_FPR_, 256 // .. 256+18*8: 64 bit FPR saves.
198 |.define SAVE_GPR_, 112 // .. 112+18*8: 64 bit GPR saves.
199 |// 48(sp) // Callee parameter save area (ABI mandated).
200 |.define SAVE_TOC, 40(sp) // TOC save area.
201 |.define TMPD_LO, 36(sp) // \ Link editor temp (ABI mandated).
202 |.define TMPD_HI, 32(sp) // /
203 |.define TONUM_LO, 28(sp) // \ Compiler temp (ABI mandated).
204 |.define TONUM_HI, 24(sp) // /
205 |// Next frame lr: 16(sp)
206 |.define SAVE_CR, 8(sp) // 64 bit CR save.
207 |// Back chain for sp: 0(sp) <-- sp while in interpreter
209 |.define TMPD_BLO, 39(sp)
210 |.define TMPD, TMPD_HI
211 |.define TONUM_D, TONUM_HI
216 |.define SAVE_LR, 276(sp)
217 |.define CFRAME_SPACE, 272 // Delta for sp.
218 |// Back chain for sp: 272(sp) <-- sp entering interpreter
219 |.define SAVE_FPR_, 128 // .. 128+18*8: 64 bit FPR saves.
220 |.define SAVE_GPR_, 56 // .. 56+18*4: 32 bit GPR saves.
221 |.define SAVE_CR, 52(sp) // 32 bit CR save.
222 |.define SAVE_ERRF, 48(sp) // 32 bit C frame info.
223 |.define SAVE_NRES, 44(sp)
224 |.define SAVE_CFRAME, 40(sp)
225 |.define SAVE_L, 36(sp)
226 |.define SAVE_PC, 32(sp)
227 |.define SAVE_MULTRES, 28(sp)
228 |.define UNUSED1, 24(sp)
229 |.define TMPD_LO, 20(sp)
230 |.define TMPD_HI, 16(sp)
231 |.define TONUM_LO, 12(sp)
232 |.define TONUM_HI, 8(sp)
233 |// Next frame lr: 4(sp)
234 |// Back chain for sp: 0(sp) <-- sp while in interpreter
236 |.define TMPD_BLO, 23(sp)
237 |.define TMPD, TMPD_HI
238 |.define TONUM_D, TONUM_HI
244 | std r..reg, SAVE_GPR_+(reg-14)*8(sp)
246 | stw r..reg, SAVE_GPR_+(reg-14)*4(sp)
248 | stfd f..reg, SAVE_FPR_+(reg-14)*8(sp)
252 | ld r..reg, SAVE_GPR_+(reg-14)*8(sp)
254 | lwz r..reg, SAVE_GPR_+(reg-14)*4(sp)
256 | lfd f..reg, SAVE_FPR_+(reg-14)*8(sp)
260 |.if GPR64 and not FRAME32
261 | stdu sp, -CFRAME_SPACE(sp)
263 | stwu sp, -CFRAME_SPACE(sp)
265 | save_ 14; save_ 15; save_ 16
267 | save_ 17; save_ 18; save_ 19; save_ 20; save_ 21; save_ 22
268 |.if GPR64 and not FRAME32
273 | save_ 23; save_ 24; save_ 25
275 | save_ 26; save_ 27; save_ 28; save_ 29; save_ 30; save_ 31
281 | .toc std TOCREG, SAVE_TOC
285 |.if GPR64 and not FRAME32
295 | rest_ 14; rest_ 15; rest_ 16; rest_ 17; rest_ 18; rest_ 19
297 |.if PPE; mtocrf 0x20, r12; .else; mtcrf 0x38, r12; .endif
298 | rest_ 20; rest_ 21; rest_ 22; rest_ 23; rest_ 24; rest_ 25
299 |.if PPE; mtocrf 0x10, r12; .endif
300 | rest_ 26; rest_ 27; rest_ 28; rest_ 29; rest_ 30; rest_ 31
301 |.if PPE; mtocrf 0x08, r12; .endif
302 | addi sp, sp, CFRAME_SPACE
305 |// Type definitions. Some of these are only used for documentation.
306 |.type L, lua_State, LREG
307 |.type GL, global_State
308 |.type TVALUE, TValue
312 |.type LFUNC, GCfuncL
313 |.type CFUNC, GCfuncC
314 |.type PROTO, GCproto
315 |.type UPVAL, GCupval
318 |.type TRACE, GCtrace
321 |//-----------------------------------------------------------------------
323 |// These basic macros should really be part of DynASM.
324 |.macro srwi, rx, ry, n; rlwinm rx, ry, 32-n, n, 31; .endmacro
325 |.macro slwi, rx, ry, n; rlwinm rx, ry, n, 0, 31-n; .endmacro
326 |.macro rotlwi, rx, ry, n; rlwinm rx, ry, n, 0, 31; .endmacro
327 |.macro rotlw, rx, ry, rn; rlwnm rx, ry, rn, 0, 31; .endmacro
328 |.macro subi, rx, ry, i; addi rx, ry, -i; .endmacro
330 |// Trap for not-yet-implemented parts.
331 |.macro NYI; tw 4, sp, sp; .endmacro
333 |// int/FP conversions.
334 |.macro tonum_i, freg, reg
335 | xoris reg, reg, 0x8000
338 | fsub freg, freg, TONUM
341 |.macro tonum_u, freg, reg
344 | fsub freg, freg, TOBIT
347 |.macro toint, reg, freg, tmpfreg
348 | fctiwz tmpfreg, freg
353 |.macro toint, reg, freg
354 | toint reg, freg, freg
357 |//-----------------------------------------------------------------------
359 |// Access to frame relative to BASE.
360 |.define FRAME_PC, -8
361 |.define FRAME_FUNC, -4
363 |// Instruction decode.
364 |.macro decode_OP4, dst, ins; rlwinm dst, ins, 2, 22, 29; .endmacro
365 |.macro decode_OP8, dst, ins; rlwinm dst, ins, 3, 21, 28; .endmacro
366 |.macro decode_RA8, dst, ins; rlwinm dst, ins, 27, 21, 28; .endmacro
367 |.macro decode_RB8, dst, ins; rlwinm dst, ins, 11, 21, 28; .endmacro
368 |.macro decode_RC8, dst, ins; rlwinm dst, ins, 19, 21, 28; .endmacro
369 |.macro decode_RD8, dst, ins; rlwinm dst, ins, 19, 13, 28; .endmacro
371 |.macro decode_OP1, dst, ins; rlwinm dst, ins, 0, 24, 31; .endmacro
372 |.macro decode_RD4, dst, ins; rlwinm dst, ins, 18, 14, 29; .endmacro
374 |// Instruction fetch.
379 |// Instruction decode+dispatch. Note: optimized for e300!
381 | decode_OPP TMP1, INS
382 | lpx TMP0, DISPATCH, TMP1
395 |// Instruction footer.
397 | // Replicated dispatch. Less unpredictable branches, but higher I-Cache use.
398 | .define ins_next, ins_NEXT
399 | .define ins_next_, ins_NEXT
400 | .define ins_next1, ins_NEXT1
401 | .define ins_next2, ins_NEXT2
403 | // Common dispatch. Lower I-Cache use, only one (very) unpredictable branch.
404 | // Affects only certain kinds of benchmarks (and only with -j off).
419 |// Call decode and dispatch.
421 | // BASE = new base, RB = LFUNC/CFUNC, RC = nargs*8, FRAME_PC(BASE) = PC
422 | lwz PC, LFUNC:RB->pc
425 | decode_OPP TMP1, INS
427 | lpx TMP0, DISPATCH, TMP1
434 | // BASE = new base, RB = LFUNC/CFUNC, RC = nargs*8, PC = caller PC
435 | stw PC, FRAME_PC(BASE)
439 |//-----------------------------------------------------------------------
441 |// Macros to test operand types.
442 |.macro checknum, reg; cmplw reg, TISNUM; .endmacro
443 |.macro checknum, cr, reg; cmplw cr, reg, TISNUM; .endmacro
444 |.macro checkstr, reg; cmpwi reg, LJ_TSTR; .endmacro
445 |.macro checktab, reg; cmpwi reg, LJ_TTAB; .endmacro
446 |.macro checkfunc, reg; cmpwi reg, LJ_TFUNC; .endmacro
447 |.macro checknil, reg; cmpwi reg, LJ_TNIL; .endmacro
451 | addis PC, PC, -(BCBIAS_J*4 >> 16)
455 |// Assumes DISPATCH is relative to GL.
456 #define DISPATCH_GL(field) (GG_DISP2G + (int)offsetof(global_State, field))
457 #define DISPATCH_J(field) (GG_DISP2J + (int)offsetof(jit_State, field))
459 #define PC2PROTO(field) ((int)offsetof(GCproto, field)-(int)sizeof(GCproto))
461 |.macro hotcheck, delta, target
462 | rlwinm TMP1, PC, 31, 25, 30
463 | addi TMP1, TMP1, GG_DISP2HOT
464 | lhzx TMP2, DISPATCH, TMP1
465 | addic. TMP2, TMP2, -delta
466 | sthx TMP2, DISPATCH, TMP1
471 | hotcheck HOTCOUNT_LOOP, ->vm_hotloop
475 | hotcheck HOTCOUNT_CALL, ->vm_hotcall
478 |// Set current VM state. Uses TMP0.
479 |.macro li_vmstate, st; li TMP0, ~LJ_VMST_..st; .endmacro
480 |.macro st_vmstate; stw TMP0, DISPATCH_GL(vmstate)(DISPATCH); .endmacro
482 |// Move table write barrier back. Overwrites mark and tmp.
483 |.macro barrierback, tab, mark, tmp
484 | lwz tmp, DISPATCH_GL(gc.grayagain)(DISPATCH)
485 | // Assumes LJ_GC_BLACK is 0x04.
486 | rlwinm mark, mark, 0, 30, 28 // black2gray(tab)
487 | stw tab, DISPATCH_GL(gc.grayagain)(DISPATCH)
488 | stb mark, tab->marked
489 | stw tmp, tab->gclist
492 |//-----------------------------------------------------------------------
494 /* Generate subroutines used by opcodes and other parts of the VM. */
495 /* The .code_sub section should be last to help static branch prediction. */
496 static void build_subroutines(BuildCtx *ctx)
500 |//-----------------------------------------------------------------------
501 |//-- Return handling ----------------------------------------------------
502 |//-----------------------------------------------------------------------
505 | // See vm_return. Also: TMP2 = previous base.
506 | andix. TMP0, PC, FRAME_P
508 | beq ->cont_dispatch
510 | // Return from pcall or xpcall fast func.
511 | lwz PC, FRAME_PC(TMP2) // Fetch PC of previous frame.
512 | mr BASE, TMP2 // Restore caller base.
513 | // Prepending may overwrite the pcall frame, so do it at the end.
514 | stwu TMP1, FRAME_PC(RA) // Prepend true to results.
517 | addi RD, RD, 8 // RD = (nresults+1)*8.
518 | andix. TMP0, PC, FRAME_TYPE
520 | li CRET1, LUA_YIELD
521 | beq cr1, ->vm_unwind_c_eh
523 | beq ->BC_RET_Z // Handle regular return to Lua.
526 | // BASE = base, RA = resultptr, RD/MULTRES = (nresults+1)*8, PC = return
527 | // TMP0 = PC & FRAME_TYPE
528 | cmpwi TMP0, FRAME_C
529 | rlwinm TMP2, PC, 0, 0, 28
531 | sub TMP2, BASE, TMP2 // TMP2 = previous base.
534 | addic. TMP1, RD, -8
536 | lwz TMP2, SAVE_NRES
542 | addic. TMP1, TMP1, -8
550 | cmpw TMP2, RD // More/less results wanted?
553 | stp BASE, L->top // Store new top.
556 | lp TMP0, SAVE_CFRAME // Restore previous C frame.
557 | li CRET1, 0 // Ok return status for vm_pcall.
558 | stp TMP0, L->cframe
565 | ble >7 // Less results wanted?
566 | // More results wanted. Check stack size and fill up results with nil.
567 | lwz TMP1, L->maxstack
570 | stw TISNIL, 0(BASE)
575 |7: // Less results wanted.
576 | subfic TMP3, TMP2, 0 // LUA_MULTRET+1 case?
578 | subfe TMP1, TMP1, TMP1 // TMP1 = TMP2 == 0 ? 0 : -1
579 | and TMP0, TMP0, TMP1
580 | sub BASE, BASE, TMP0 // Either keep top or shrink it.
583 |8: // Corner case: need to grow stack for filling up results.
584 | // This can happen if:
585 | // - A C function grows the stack (a lot).
586 | // - The GC shrinks the stack in between.
587 | // - A return back from a lua_call() with (high) nresults adjustment.
588 | stp BASE, L->top // Save current top held in BASE (yes).
592 | bl extern lj_state_growstack // (lua_State *L, int n)
593 | lwz TMP2, SAVE_NRES
596 | lp BASE, L->top // Need the (realloced) L->top in BASE.
599 |->vm_unwind_c: // Unwind C stack, return from vm_pcall.
600 | // (void *cframe, int errcode)
603 |->vm_unwind_c_eh: // Landing pad for external unwinder.
605 | .toc ld TOCREG, SAVE_TOC
606 | li TMP0, ~LJ_VMST_C
607 | lwz GL:TMP1, L->glref
608 | stw TMP0, GL:TMP1->vmstate
611 |->vm_unwind_ff: // Unwind C stack, return from ff pcall.
614 | rldicr sp, CARG1, 0, 61
616 | rlwinm sp, CARG1, 0, 0, 29
618 |->vm_unwind_ff_eh: // Landing pad for external unwinder.
620 | .toc ld TOCREG, SAVE_TOC
621 | li TISNUM, LJ_TISNUM // Setup type comparison constants.
623 | lus TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float).
624 | lwz DISPATCH, L->glref // Setup pointer to dispatch table.
628 | ori TMP3, TMP3, 0x0004 // TONUM = 2^52 + 2^51 + 2^31 (float).
632 | lwz PC, FRAME_PC(BASE) // Fetch PC of previous frame.
633 | la RA, -8(BASE) // Results start at BASE-8.
635 | addi DISPATCH, DISPATCH, GG_G2DISP
636 | stw TMP1, 0(RA) // Prepend false to error message.
637 | li RD, 16 // 2 results: false + error message.
642 |//-----------------------------------------------------------------------
643 |//-- Grow stack for calls -----------------------------------------------
644 |//-----------------------------------------------------------------------
646 |->vm_growstack_c: // Grow stack for C function.
647 | li CARG2, LUA_MINSTACK
650 |->vm_growstack_l: // Grow stack for Lua function.
651 | // BASE = new base, RA = BASE+framesize*8, RC = nargs*8, PC = first PC
655 | addi PC, PC, 4 // Must point after first instruction.
659 | // L->base = new base, L->top = top
662 | bl extern lj_state_growstack // (lua_State *L, int n)
665 | lwz LFUNC:RB, FRAME_FUNC(BASE)
667 | // BASE = new base, RB = LFUNC/CFUNC, RC = nargs*8, FRAME_PC(BASE) = PC
668 | ins_callt // Just retry the call.
670 |//-----------------------------------------------------------------------
671 |//-- Entry points into the assembler VM ---------------------------------
672 |//-----------------------------------------------------------------------
674 |->vm_resume: // Setup C frame and resume thread.
675 | // (lua_State *L, TValue *base, int nres1 = 0, ptrdiff_t ef = 0)
678 | lwz DISPATCH, L->glref // Setup pointer to dispatch table.
680 | lbz TMP1, L->status
683 | addi TMP0, sp, CFRAME_RESUME
684 | addi DISPATCH, DISPATCH, GG_G2DISP
685 | stw CARG3, SAVE_NRES
687 | stw CARG3, SAVE_ERRF
688 | stp CARG3, SAVE_CFRAME
689 | stw CARG1, SAVE_PC // Any value outside of bytecode is ok.
690 | stp TMP0, L->cframe
693 | // Resume after yield (like a return).
694 | stw L, DISPATCH_GL(cur_L)(DISPATCH)
697 | li TISNUM, LJ_TISNUM // Setup type comparison constants.
699 | lwz PC, FRAME_PC(BASE)
700 | lus TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float).
701 | stb CARG3, L->status
703 | ori TMP3, TMP3, 0x0004 // TONUM = 2^52 + 2^51 + 2^31 (float).
707 | lus TMP0, 0x4338 // Hiword of 2^52 + 2^51 (double)
713 | andix. TMP0, PC, FRAME_TYPE
720 |->vm_pcall: // Setup protected C frame and enter VM.
721 | // (lua_State *L, TValue *base, int nres1, ptrdiff_t ef)
724 | stw CARG4, SAVE_ERRF
727 |->vm_call: // Setup C frame and enter VM.
728 | // (lua_State *L, TValue *base, int nres1)
732 |1: // Entry point for vm_pcall above (PC = ftype).
733 | lp TMP1, L:CARG1->cframe
735 | stw CARG3, SAVE_NRES
736 | lwz DISPATCH, L->glref // Setup pointer to dispatch table.
739 | addi DISPATCH, DISPATCH, GG_G2DISP
740 | stw CARG1, SAVE_PC // Any value outside of bytecode is ok.
741 | stp TMP1, SAVE_CFRAME
742 | stp sp, L->cframe // Add our C frame to cframe chain.
744 |3: // Entry point for vm_cpcall/vm_resume (BASE = base, PC = ftype).
745 | stw L, DISPATCH_GL(cur_L)(DISPATCH)
746 | lp TMP2, L->base // TMP2 = old base (used in vmeta_call).
747 | li TISNUM, LJ_TISNUM // Setup type comparison constants.
749 | lus TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float).
753 | ori TMP3, TMP3, 0x0004 // TONUM = 2^52 + 2^51 + 2^31 (float).
755 | sub PC, PC, TMP2 // PC = frame delta + frame type
757 | lus TMP0, 0x4338 // Hiword of 2^52 + 2^51 (double)
758 | sub NARGS8:RC, TMP1, BASE
766 | // TMP2 = old base, BASE = new base, RC = nargs*8, PC = caller PC
767 | lwz TMP0, FRAME_PC(BASE)
768 | lwz LFUNC:RB, FRAME_FUNC(BASE)
769 | checkfunc TMP0; bne ->vmeta_call
771 |->vm_call_dispatch_f:
773 | // BASE = new base, RB = func, RC = nargs*8, PC = caller PC
775 |->vm_cpcall: // Setup protected C frame, call C.
776 | // (lua_State *L, lua_CFunction func, void *ud, lua_CPFunction cp)
779 | lwz TMP0, L:CARG1->stack
782 | lwz DISPATCH, L->glref // Setup pointer to dispatch table.
783 | stw CARG1, SAVE_PC // Any value outside of bytecode is ok.
784 | sub TMP0, TMP0, TMP1 // Compute -savestack(L, L->top).
786 | addi DISPATCH, DISPATCH, GG_G2DISP
787 | .toc lp CARG4, 0(CARG4)
789 | stw TMP0, SAVE_NRES // Neg. delta means cframe w/o frame.
790 | stw TMP2, SAVE_ERRF // No error function.
791 | stp TMP1, SAVE_CFRAME
792 | stp sp, L->cframe // Add our C frame to cframe chain.
793 | stw L, DISPATCH_GL(cur_L)(DISPATCH)
795 | bctrl // (lua_State *L, lua_CFunction func, void *ud)
803 | bne <3 // Else continue with the call.
804 | b ->vm_leave_cp // No base? Just remove C frame.
806 |//-----------------------------------------------------------------------
807 |//-- Metamethod handling ------------------------------------------------
808 |//-----------------------------------------------------------------------
810 |// The lj_meta_* functions (except for lj_meta_cat) don't reallocate the
811 |// stack, so BASE doesn't need to be reloaded across these calls.
813 |//-- Continuation dispatch ----------------------------------------------
816 | // BASE = meta base, RA = resultptr, RD = (nresults+1)*8
817 | lwz TMP0, -12(BASE) // Continuation.
819 | mr BASE, TMP2 // Restore caller BASE.
820 | lwz LFUNC:TMP1, FRAME_FUNC(TMP2)
824 | lwz PC, -16(RB) // Restore PC from [cont|PC].
826 | lwz TMP1, LFUNC:TMP1->pc
827 | stwx TISNIL, RA, TMP2 // Ensure one valid arg.
831 | lwz KBASE, PC2PROTO(k)(TMP1)
832 | // BASE = base, RA = resultptr, RB = meta base
834 | bctr // Jump to continuation.
838 | beq ->cont_ffi_callback // cont = 1: return from FFI callback.
839 | // cont = 0: tailcall from C function.
845 |->cont_cat: // RA = resultptr, RB = meta base
848 | decode_RB8 SAVE0, INS
850 | add TMP1, BASE, SAVE0
853 | sub CARG3, CARG2, TMP1
860 |//-- Table indexing metamethods -----------------------------------------
863 | la CARG3, DISPATCH_GL(tmptv)(DISPATCH)
866 | stw STR:RC, 4(CARG3)
867 | add CARG2, BASE, RB
872 | la CARG2, DISPATCH_GL(tmptv)(DISPATCH)
874 | stw TAB:RB, 4(CARG2)
875 | la CARG3, DISPATCH_GL(tmptv2)(DISPATCH)
878 | stw STR:RC, 4(CARG3)
882 |->vmeta_tgetb: // TMP0 = index
887 | la CARG3, DISPATCH_GL(tmptv)(DISPATCH)
888 | add CARG2, BASE, RB
890 | stw TISNUM, 0(CARG3)
900 | add CARG2, BASE, RB
901 | add CARG3, BASE, RC
906 | bl extern lj_meta_tget // (lua_State *L, TValue *o, TValue *k)
907 | // Returns TValue * (finished) or NULL (metamethod).
915 |3: // Call __index metamethod.
916 | // BASE = base, L->top = new base, stack = cont/func/t/k
917 | subfic TMP1, BASE, FRAME_CONT
919 | stw PC, -16(BASE) // [cont|PC]
921 | lwz LFUNC:RB, FRAME_FUNC(BASE) // Guaranteed to be a function here.
922 | li NARGS8:RC, 16 // 2 args for func(t, k).
923 | b ->vm_call_dispatch_f
926 | bl extern lj_tab_getinth // (GCtab *t, int32_t key)
927 | // Returns cTValue * or NULL.
933 | stwx TISNIL, BASE, RA
936 |//-----------------------------------------------------------------------
939 | la CARG3, DISPATCH_GL(tmptv)(DISPATCH)
942 | stw STR:RC, 4(CARG3)
943 | add CARG2, BASE, RB
948 | la CARG2, DISPATCH_GL(tmptv)(DISPATCH)
950 | stw TAB:RB, 4(CARG2)
951 | la CARG3, DISPATCH_GL(tmptv2)(DISPATCH)
954 | stw STR:RC, 4(CARG3)
958 |->vmeta_tsetb: // TMP0 = index
963 | la CARG3, DISPATCH_GL(tmptv)(DISPATCH)
964 | add CARG2, BASE, RB
966 | stw TISNUM, 0(CARG3)
976 | add CARG2, BASE, RB
977 | add CARG3, BASE, RC
982 | bl extern lj_meta_tset // (lua_State *L, TValue *o, TValue *k)
983 | // Returns TValue * (finished) or NULL (metamethod).
987 | // NOBARRIER: lj_meta_tset ensures the table is not black.
992 |3: // Call __newindex metamethod.
993 | // BASE = base, L->top = new base, stack = cont/func/t/k/(v)
994 | subfic TMP1, BASE, FRAME_CONT
996 | stw PC, -16(BASE) // [cont|PC]
998 | lwz LFUNC:RB, FRAME_FUNC(BASE) // Guaranteed to be a function here.
999 | li NARGS8:RC, 24 // 3 args for func(t, k, v)
1000 | stfd f0, 16(BASE) // Copy value to third argument.
1001 | b ->vm_call_dispatch_f
1006 | bl extern lj_tab_setinth // (lua_State *L, GCtab *t, int32_t key)
1007 | // Returns TValue *.
1008 | stfd f14, 0(CRET1)
1011 |//-- Comparison metamethods ---------------------------------------------
1019 | add CARG2, BASE, RA
1025 | add CARG3, BASE, RD
1028 | decode_OP1 CARG4, INS
1029 | bl extern lj_meta_comp // (lua_State *L, TValue *o1, *o2, int op)
1030 | // Returns 0/1 or TValue * (metamethod).
1034 | subfic CRET1, CRET1, 0
1038 | decode_RD4 TMP2, INS
1039 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
1040 | and TMP2, TMP2, CRET1
1045 |->cont_ra: // RA = resultptr
1048 | decode_RA8 TMP1, INS
1049 | stfdx f0, BASE, TMP1
1052 |->cont_condt: // RA = resultptr
1054 | .gpr64 extsw TMP0, TMP0
1055 | subfic TMP0, TMP0, LJ_TTRUE // Branch if result is true.
1056 | subfe CRET1, CRET1, CRET1
1060 |->cont_condf: // RA = resultptr
1062 | .gpr64 extsw TMP0, TMP0
1063 | subfic TMP0, TMP0, LJ_TTRUE // Branch if result is false.
1064 | subfe CRET1, CRET1, CRET1
1068 | // CARG2, CARG3, CARG4 are already set by BC_ISEQV/BC_ISNEV.
1073 | bl extern lj_meta_equal // (lua_State *L, GCobj *o1, *o2, int ne)
1074 | // Returns 0/1 or TValue * (metamethod).
1084 | bl extern lj_meta_equal_cd // (lua_State *L, BCIns op)
1085 | // Returns 0/1 or TValue * (metamethod).
1096 | bl extern lj_meta_istype // (lua_State *L, BCReg ra, BCReg tp)
1099 |//-- Arithmetic metamethods ---------------------------------------------
1102 | add CARG3, KBASE, RC
1103 | add CARG4, BASE, RB
1118 | add CARG3, BASE, RB
1119 | add CARG4, KBASE, RC
1123 | add CARG3, BASE, RB
1124 | add CARG4, BASE, RC
1135 | add CARG2, BASE, RA
1139 | decode_OP1 CARG5, INS // Caveat: CARG5 overlaps INS.
1140 | bl extern lj_meta_arith // (lua_State *L, TValue *ra,*rb,*rc, BCReg op)
1141 | // Returns NULL (finished) or TValue * (metamethod).
1145 | // Call metamethod for binary op.
1147 | // BASE = old base, CRET1 = new base, stack = cont/func/o1/o2
1148 | sub TMP1, CRET1, BASE
1149 | stw PC, -16(CRET1) // [cont|PC]
1151 | addi PC, TMP1, FRAME_CONT
1153 | li NARGS8:RC, 16 // 2 args for func(o1, o2).
1154 | b ->vm_call_dispatch
1164 | bl extern lj_meta_len // (lua_State *L, TValue *o)
1165 | // Returns NULL (retry) or TValue * (metamethod base).
1168 | bne ->vmeta_binop // Binop call for compatibility.
1172 | b ->vmeta_binop // Binop call for compatibility.
1175 |//-- Call metamethod ----------------------------------------------------
1177 |->vmeta_call: // Resolve and call __call metamethod.
1178 | // TMP2 = old base, BASE = new base, RC = nargs*8
1180 | stp TMP2, L->base // This is the callers base!
1181 | subi CARG2, BASE, 8
1183 | add CARG3, BASE, RC
1184 | mr SAVE0, NARGS8:RC
1185 | bl extern lj_meta_call // (lua_State *L, TValue *func, TValue *top)
1186 | lwz LFUNC:RB, FRAME_FUNC(BASE) // Guaranteed to be a function here.
1187 | addi NARGS8:RC, SAVE0, 8 // Got one more argument now.
1190 |->vmeta_callt: // Resolve __call for BC_CALLT.
1191 | // BASE = old base, RA = new base, RC = nargs*8
1197 | mr SAVE0, NARGS8:RC
1198 | bl extern lj_meta_call // (lua_State *L, TValue *func, TValue *top)
1199 | lwz TMP1, FRAME_PC(BASE)
1200 | addi NARGS8:RC, SAVE0, 8 // Got one more argument now.
1201 | lwz LFUNC:RB, FRAME_FUNC(RA) // Guaranteed to be a function here.
1204 |//-- Argument coercion for 'for' statement ------------------------------
1212 | bl extern lj_meta_for // (lua_State *L, TValue *base)
1214 | decode_OP1 TMP0, SAVE0
1216 | decode_RA8 RA, SAVE0
1218 | cmpwi TMP0, BC_JFORI
1220 | decode_RD8 RD, SAVE0
1226 |//-----------------------------------------------------------------------
1227 |//-- Fast functions -----------------------------------------------------
1228 |//-----------------------------------------------------------------------
1230 |.macro .ffunc, name
1234 |.macro .ffunc_1, name
1236 | cmplwi NARGS8:RC, 8
1237 | lwz CARG3, 0(BASE)
1238 | lwz CARG1, 4(BASE)
1239 | blt ->fff_fallback
1242 |.macro .ffunc_2, name
1244 | cmplwi NARGS8:RC, 16
1245 | lwz CARG3, 0(BASE)
1246 | lwz CARG4, 8(BASE)
1247 | lwz CARG1, 4(BASE)
1248 | lwz CARG2, 12(BASE)
1249 | blt ->fff_fallback
1252 |.macro .ffunc_n, name
1254 | cmplwi NARGS8:RC, 8
1255 | lwz CARG3, 0(BASE)
1256 | lfd FARG1, 0(BASE)
1257 | blt ->fff_fallback
1258 | checknum CARG3; bge ->fff_fallback
1261 |.macro .ffunc_nn, name
1263 | cmplwi NARGS8:RC, 16
1264 | lwz CARG3, 0(BASE)
1265 | lfd FARG1, 0(BASE)
1266 | lwz CARG4, 8(BASE)
1267 | lfd FARG2, 8(BASE)
1268 | blt ->fff_fallback
1269 | checknum CARG3; bge ->fff_fallback
1270 | checknum CARG4; bge ->fff_fallback
1273 |// Inlined GC threshold check. Caveat: uses TMP0 and TMP1.
1275 | lwz TMP0, DISPATCH_GL(gc.total)(DISPATCH)
1276 | lwz TMP1, DISPATCH_GL(gc.threshold)(DISPATCH)
1281 |//-- Base library: checks -----------------------------------------------
1284 | li TMP1, LJ_TFALSE
1286 | cmplw cr1, CARG3, TMP1
1287 | lwz PC, FRAME_PC(BASE)
1288 | bge cr1, ->fff_fallback
1290 | addi RD, NARGS8:RC, 8 // Compute (nresults+1)*8.
1292 | beq ->fff_res // Done if exactly 1 argument.
1297 | lfdx f0, BASE, TMP1
1298 | stfdx f0, RA, TMP1
1299 | addi TMP1, TMP1, 8
1304 | cmplwi NARGS8:RC, 8
1305 | lwz CARG1, 0(BASE)
1306 | blt ->fff_fallback
1307 | .gpr64 extsw CARG1, CARG1
1308 | subfc TMP0, TISNUM, CARG1
1309 | subfe TMP2, CARG1, CARG1
1310 | orc TMP1, TMP2, TMP0
1311 | addi TMP1, TMP1, ~LJ_TISNUM+1
1312 | slwi TMP1, TMP1, 3
1313 | la TMP2, CFUNC:RB->upvalue
1314 | lfdx FARG1, TMP2, TMP1
1317 |//-- Base library: getters and setters ---------------------------------
1319 |.ffunc_1 getmetatable
1320 | checktab CARG3; bne >6
1321 |1: // Field metatable must be at same offset for GCtab and GCudata!
1322 | lwz TAB:CARG1, TAB:CARG1->metatable
1325 | cmplwi TAB:CARG1, 0
1326 | lwz STR:RC, DISPATCH_GL(gcroot[GCROOT_MMNAME+MM_metatable])(DISPATCH)
1328 | lwz TMP0, TAB:CARG1->hmask
1329 | li CARG3, LJ_TTAB // Use metatable as default result.
1330 | lwz TMP1, STR:RC->hash
1331 | lwz NODE:TMP2, TAB:CARG1->node
1332 | and TMP1, TMP1, TMP0 // idx = str->hash & tab->hmask
1333 | slwi TMP0, TMP1, 5
1334 | slwi TMP1, TMP1, 3
1335 | sub TMP1, TMP0, TMP1
1336 | add NODE:TMP2, NODE:TMP2, TMP1 // node = tab->node + (idx*32-idx*8)
1337 |3: // Rearranged logic, because we expect _not_ to find the key.
1338 | lwz CARG4, NODE:TMP2->key
1339 | lwz TMP0, 4+offsetof(Node, key)(NODE:TMP2)
1340 | lwz CARG2, NODE:TMP2->val
1341 | lwz TMP1, 4+offsetof(Node, val)(NODE:TMP2)
1342 | checkstr CARG4; bne >4
1343 | cmpw TMP0, STR:RC; beq >5
1345 | lwz NODE:TMP2, NODE:TMP2->next
1346 | cmplwi NODE:TMP2, 0
1347 | beq ->fff_restv // Not found, keep default result.
1351 | beq ->fff_restv // Ditto for nil value.
1352 | mr CARG3, CARG2 // Return value of mt.__metatable.
1357 | cmpwi CARG3, LJ_TUDATA; beq <1
1358 | .gpr64 extsw CARG3, CARG3
1359 | subfc TMP0, TISNUM, CARG3
1360 | subfe TMP2, CARG3, CARG3
1361 | orc TMP1, TMP2, TMP0
1362 | addi TMP1, TMP1, ~LJ_TISNUM+1
1363 | slwi TMP1, TMP1, 2
1364 | la TMP2, DISPATCH_GL(gcroot[GCROOT_BASEMT])(DISPATCH)
1365 | lwzx TAB:CARG1, TMP2, TMP1
1368 |.ffunc_2 setmetatable
1369 | // Fast path: no mt for table yet and not clearing the mt.
1370 | checktab CARG3; bne ->fff_fallback
1371 | lwz TAB:TMP1, TAB:CARG1->metatable
1372 | checktab CARG4; bne ->fff_fallback
1373 | cmplwi TAB:TMP1, 0
1374 | lbz TMP3, TAB:CARG1->marked
1375 | bne ->fff_fallback
1376 | andix. TMP0, TMP3, LJ_GC_BLACK // isblack(table)
1377 | stw TAB:CARG2, TAB:CARG1->metatable
1379 | barrierback TAB:CARG1, TMP3, TMP0
1383 | cmplwi NARGS8:RC, 16
1384 | lwz CARG4, 0(BASE)
1385 | lwz TAB:CARG2, 4(BASE)
1386 | blt ->fff_fallback
1387 | checktab CARG4; bne ->fff_fallback
1390 | bl extern lj_tab_get // (lua_State *L, GCtab *t, cTValue *key)
1391 | // Returns cTValue *.
1392 | lfd FARG1, 0(CRET1)
1395 |//-- Base library: conversions ------------------------------------------
1398 | // Only handles the number case inline (without a base argument).
1399 | cmplwi NARGS8:RC, 8
1400 | lwz CARG1, 0(BASE)
1401 | lfd FARG1, 0(BASE)
1402 | bne ->fff_fallback // Exactly one argument.
1403 | checknum CARG1; bgt ->fff_fallback
1407 | // Only handles the string or number case inline.
1409 | // A __tostring method in the string base metatable is ignored.
1410 | beq ->fff_restv // String key?
1411 | // Handle numbers inline, unless a number base metatable is present.
1412 | lwz TMP0, DISPATCH_GL(gcroot[GCROOT_BASEMT_NUM])(DISPATCH)
1414 | cmplwi cr1, TMP0, 0
1415 | stp BASE, L->base // Add frame since C call can throw.
1416 | crorc 4*cr0+eq, 4*cr0+gt, 4*cr1+eq
1417 | stw PC, SAVE_PC // Redundant (but a defined value).
1418 | beq ->fff_fallback
1423 | bl extern lj_strfmt_number // (lua_State *L, cTValue *o)
1425 | bl extern lj_strfmt_num // (lua_State *L, lua_Number *np)
1427 | // Returns GCstr *.
1431 |//-- Base library: iterators -------------------------------------------
1434 | cmplwi NARGS8:RC, 8
1435 | lwz CARG1, 0(BASE)
1436 | lwz TAB:CARG2, 4(BASE)
1437 | blt ->fff_fallback
1438 | stwx TISNIL, BASE, NARGS8:RC // Set missing 2nd arg to nil.
1440 | lwz PC, FRAME_PC(BASE)
1441 | bne ->fff_fallback
1442 | stp BASE, L->base // Add frame since C call can throw.
1444 | stp BASE, L->top // Dummy frame length is ok.
1447 | bl extern lj_tab_next // (lua_State *L, GCtab *t, TValue *key)
1448 | // Returns 0 at end of traversal.
1451 | beq ->fff_restv // End of traversal: return nil.
1452 | lfd f0, 8(BASE) // Copy key and value to results.
1462 | lwz PC, FRAME_PC(BASE)
1463 | bne ->fff_fallback
1465 | lwz TAB:TMP2, TAB:CARG1->metatable
1466 | lfd f0, CFUNC:RB->upvalue[0]
1467 | cmplwi TAB:TMP2, 0
1469 | bne ->fff_fallback
1471 | lfd f0, CFUNC:RB->upvalue[0]
1474 | stw TISNIL, 8(BASE)
1480 | cmplwi NARGS8:RC, 16
1481 | lwz CARG3, 0(BASE)
1482 | lwz TAB:CARG1, 4(BASE)
1483 | lwz CARG4, 8(BASE)
1485 | lwz TMP2, 12(BASE)
1487 | lfd FARG2, 8(BASE)
1489 | blt ->fff_fallback
1491 | checknum cr1, CARG4
1492 | lwz PC, FRAME_PC(BASE)
1494 | bne ->fff_fallback
1495 | bne cr1, ->fff_fallback
1499 | bne ->fff_fallback
1501 | bge cr1, ->fff_fallback
1503 | toint TMP2, FARG2, f0
1505 | lwz TMP0, TAB:CARG1->asize
1506 | lwz TMP1, TAB:CARG1->array
1508 | fadd FARG2, FARG2, FARG1
1510 | addi TMP2, TMP2, 1
1515 | slwi TMP3, TMP2, 3
1518 | slwi TMP3, TMP2, 3
1521 | ble >2 // Not in array part?
1522 | lwzx TMP2, TMP1, TMP3
1523 | lfdx f0, TMP1, TMP3
1527 | beq ->fff_res // End of iteration, return 0 results.
1531 |2: // Check for empty hash part first. Otherwise call C function.
1532 | lwz TMP0, TAB:CARG1->hmask
1537 | bl extern lj_tab_getinth // (GCtab *t, int32_t key)
1538 | // Returns cTValue * or NULL.
1542 | lwz TMP2, 0(CRET1)
1548 | lwz PC, FRAME_PC(BASE)
1549 | bne ->fff_fallback
1551 | lwz TAB:TMP2, TAB:CARG1->metatable
1552 | lfd f0, CFUNC:RB->upvalue[0]
1553 | cmplwi TAB:TMP2, 0
1555 | bne ->fff_fallback
1557 | lfd f0, CFUNC:RB->upvalue[0]
1561 | stw TISNUM, 8(BASE)
1565 | stw ZERO, 12(BASE)
1570 |//-- Base library: catch errors ----------------------------------------
1573 | cmplwi NARGS8:RC, 8
1574 | lbz TMP3, DISPATCH_GL(hookmask)(DISPATCH)
1575 | blt ->fff_fallback
1578 | // Remember active hook before pcall.
1579 | rlwinm TMP3, TMP3, 32-HOOK_ACTIVE_SHIFT, 31, 31
1580 | subi NARGS8:RC, NARGS8:RC, 8
1581 | addi PC, TMP3, 8+FRAME_PCALL
1582 | b ->vm_call_dispatch
1585 | cmplwi NARGS8:RC, 16
1586 | lwz CARG4, 8(BASE)
1587 | lfd FARG2, 8(BASE)
1588 | lfd FARG1, 0(BASE)
1589 | blt ->fff_fallback
1590 | lbz TMP1, DISPATCH_GL(hookmask)(DISPATCH)
1592 | checkfunc CARG4; bne ->fff_fallback // Traceback must be a function.
1594 | // Remember active hook before pcall.
1595 | rlwinm TMP1, TMP1, 32-HOOK_ACTIVE_SHIFT, 31, 31
1596 | stfd FARG2, 0(TMP2) // Swap function and traceback.
1597 | subi NARGS8:RC, NARGS8:RC, 16
1598 | stfd FARG1, 8(TMP2)
1599 | addi PC, TMP1, 16+FRAME_PCALL
1600 | b ->vm_call_dispatch
1602 |//-- Coroutine library --------------------------------------------------
1604 |.macro coroutine_resume_wrap, resume
1606 |.ffunc_1 coroutine_resume
1607 | cmpwi CARG3, LJ_TTHREAD; bne ->fff_fallback
1609 |.ffunc coroutine_wrap_aux
1610 | lwz L:CARG1, CFUNC:RB->upvalue[0].gcr
1612 | lbz TMP0, L:CARG1->status
1613 | lp TMP1, L:CARG1->cframe
1614 | lp CARG2, L:CARG1->top
1615 | cmplwi cr0, TMP0, LUA_YIELD
1616 | lp TMP2, L:CARG1->base
1617 | cmplwi cr1, TMP1, 0
1618 | lwz TMP0, L:CARG1->maxstack
1619 | cmplw cr7, CARG2, TMP2
1620 | lwz PC, FRAME_PC(BASE)
1621 | crorc 4*cr6+lt, 4*cr0+gt, 4*cr1+eq // st>LUA_YIELD || cframe!=0
1622 | add TMP2, CARG2, NARGS8:RC
1623 | crandc 4*cr6+gt, 4*cr7+eq, 4*cr0+eq // base==top && st!=LUA_YIELD
1624 | cmplw cr1, TMP2, TMP0
1625 | cror 4*cr6+lt, 4*cr6+lt, 4*cr6+gt
1627 | cror 4*cr6+lt, 4*cr6+lt, 4*cr1+gt // cond1 || cond2 || stackov
1629 | blt cr6, ->fff_fallback
1632 | addi BASE, BASE, 8 // Keep resumed thread in stack for GC.
1633 | subi NARGS8:RC, NARGS8:RC, 8
1634 | subi TMP2, TMP2, 8
1636 | stp TMP2, L:CARG1->top
1639 |2: // Move args to coroutine.
1640 | cmpw TMP1, NARGS8:RC
1641 | lfdx f0, BASE, TMP1
1643 | stfdx f0, CARG2, TMP1
1644 | addi TMP1, TMP1, 8
1648 | mr L:SAVE0, L:CARG1
1650 | bl ->vm_resume // (lua_State *L, TValue *base, 0, 0)
1651 | // Returns thread status.
1653 | lp TMP2, L:SAVE0->base
1654 | cmplwi CRET1, LUA_YIELD
1655 | lp TMP3, L:SAVE0->top
1658 | stw L, DISPATCH_GL(cur_L)(DISPATCH)
1661 | sub RD, TMP3, TMP2
1662 | lwz TMP0, L->maxstack
1664 | add TMP1, BASE, RD
1665 | beq >6 // No results?
1668 | bgt >9 // Need to grow stack?
1671 | stp TMP2, L:SAVE0->top // Clear coroutine stack.
1672 |5: // Move results from coroutine.
1674 | lfdx f0, TMP2, TMP1
1675 | stfdx f0, BASE, TMP1
1676 | addi TMP1, TMP1, 8
1679 | andix. TMP0, PC, FRAME_TYPE
1683 | stw TMP1, -8(BASE) // Prepend true to results.
1695 |8: // Coroutine returned with error (at co->top-1).
1697 | andix. TMP0, PC, FRAME_TYPE
1699 | li TMP1, LJ_TFALSE
1701 | stp TMP3, L:SAVE0->top // Remove error from coroutine stack.
1703 | stw TMP1, -8(BASE) // Prepend false to results.
1705 | stfd f0, 0(BASE) // Copy error message.
1710 | bl extern lj_ffh_coroutine_wrap_err // (lua_State *L, lua_State *co)
1713 |9: // Handle stack expansion on return from yield.
1716 | bl extern lj_state_growstack // (lua_State *L, int n)
1721 | coroutine_resume_wrap 1 // coroutine.resume
1722 | coroutine_resume_wrap 0 // coroutine.wrap
1724 |.ffunc coroutine_yield
1725 | lp TMP0, L->cframe
1726 | add TMP1, BASE, NARGS8:RC
1728 | andix. TMP0, TMP0, CFRAME_RESUME
1730 | li CRET1, LUA_YIELD
1731 | beq ->fff_fallback
1732 | stp ZERO, L->cframe
1733 | stb CRET1, L->status
1736 |//-- Math library -------------------------------------------------------
1742 | srawi TMP1, CARG1, 31
1743 | xor TMP2, TMP1, CARG1
1746 | sub CARG1, TMP2, TMP1
1750 | sub. CARG1, TMP2, TMP1
1754 | lwz PC, FRAME_PC(BASE)
1756 | stw TISNUM, -8(BASE)
1757 | stw CRET1, -4(BASE)
1760 | lus CARG3, 0x41e0 // 2^31.
1765 | bge ->fff_fallback
1766 | rlwinm CARG3, CARG3, 0, 1, 31
1770 | // CARG3/CARG1 = TValue result.
1771 | lwz PC, FRAME_PC(BASE)
1772 | stw CARG3, -8(BASE)
1774 | stw CARG1, -4(BASE)
1776 | // RA = results, PC = return.
1779 | // RA = results, RD = (nresults+1)*8, PC = return.
1780 | andix. TMP0, PC, FRAME_TYPE
1784 | decode_RB8 RB, INS
1786 | cmplw RB, RD // More results expected?
1787 | decode_RA8 TMP0, INS
1790 | // Adjust BASE. KBASE is assumed to be set for the calling frame.
1791 | sub BASE, RA, TMP0
1794 |6: // Fill up results with nil.
1797 | stwx TISNIL, RA, TMP1
1800 |.macro math_extern, func
1801 | .ffunc_n math_ .. func
1806 |.macro math_extern2, func
1807 | .ffunc_nn math_ .. func
1812 |.macro math_round, func
1813 | .ffunc_1 math_ .. func
1814 | checknum CARG3; beqy ->fff_restv
1815 | rlwinm TMP2, CARG3, 12, 21, 31
1816 | bge ->fff_fallback
1817 | addic. TMP2, TMP2, -1023 // exp = exponent(x) - 1023
1818 | cmplwi cr1, TMP2, 31 // 0 <= exp < 31?
1819 | subfic TMP0, TMP2, 31
1821 | slwi TMP1, CARG3, 11
1822 | srwi TMP3, CARG1, 21
1823 | oris TMP1, TMP1, 0x8000
1824 | addi TMP2, TMP2, 1
1825 | or TMP1, TMP1, TMP3
1826 | slwi CARG2, CARG1, 11
1828 | slw TMP3, TMP1, TMP2
1829 | srw RD, TMP1, TMP0
1830 | or TMP3, TMP3, CARG2
1831 | srawi TMP2, CARG3, 31
1832 |.if "func" == "floor"
1833 | and TMP1, TMP3, TMP2
1834 | addic TMP0, TMP1, -1
1835 | subfe TMP1, TMP0, TMP1
1836 | add CARG1, RD, TMP1
1837 | xor CARG1, CARG1, TMP2
1838 | sub CARG1, CARG1, TMP2
1841 | andc TMP1, TMP3, TMP2
1842 | addic TMP0, TMP1, -1
1843 | subfe TMP1, TMP0, TMP1
1844 | add CARG1, RD, TMP1
1846 | xor CARG1, CARG1, TMP2
1847 | sub CARG1, CARG1, TMP2
1849 | // Overflow to 2^31.
1850 | lus CARG3, 0x41e0 // 2^31.
1855 | slwi TMP2, CARG3, 1
1856 | srawi TMP1, CARG3, 31
1857 | or TMP2, CARG1, TMP2 // ztest = (hi+hi) | lo
1858 |.if "func" == "floor"
1859 | and TMP1, TMP2, TMP1 // (ztest & sign) == 0 ? 0 : -1
1860 | subfic TMP2, TMP1, 0
1861 | subfe CARG1, CARG1, CARG1
1863 | andc TMP1, TMP2, TMP1 // (ztest & ~sign) == 0 ? 0 : 1
1864 | addic TMP2, TMP1, -1
1865 | subfe CARG1, TMP2, TMP1
1868 |4: // exp >= 31. Check for -(2^31).
1869 | xoris TMP1, TMP1, 0x8000
1870 | srawi TMP2, CARG3, 31
1871 |.if "func" == "floor"
1872 | or TMP1, TMP1, CARG2
1875 | orc TMP1, TMP1, TMP2
1878 | orc. TMP1, TMP1, TMP2
1880 | crand 4*cr0+eq, 4*cr0+eq, 4*cr1+eq
1881 | lus CARG1, 0x8000 // -(2^31).
1884 | lfd FARG1, 0(BASE)
1893 | // NYI: use internal implementation.
1900 | fsqrt FARG1, FARG1
1907 | cmplwi NARGS8:RC, 8
1908 | lwz CARG3, 0(BASE)
1909 | lfd FARG1, 0(BASE)
1910 | bne ->fff_fallback // Need exactly 1 argument.
1911 | checknum CARG3; bge ->fff_fallback
1927 | math_extern2 atan2
1932 | cmplwi NARGS8:RC, 16
1933 | lwz CARG3, 0(BASE)
1934 | lfd FARG1, 0(BASE)
1935 | lwz CARG4, 8(BASE)
1937 | lwz CARG2, 12(BASE)
1939 | lwz CARG1, 12(BASE)
1941 | blt ->fff_fallback
1942 | checknum CARG3; bge ->fff_fallback
1943 | checknum CARG4; bne ->fff_fallback
1945 |.ffunc_nn math_ldexp
1947 | toint CARG2, FARG2
1949 | toint CARG1, FARG2
1955 |.ffunc_n math_frexp
1957 | la CARG2, DISPATCH_GL(tmptv)(DISPATCH)
1959 | la CARG1, DISPATCH_GL(tmptv)(DISPATCH)
1961 | lwz PC, FRAME_PC(BASE)
1963 | lwz TMP1, DISPATCH_GL(tmptv)(DISPATCH)
1966 | tonum_i FARG2, TMP1
1980 | la CARG2, -8(BASE)
1982 | la CARG1, -8(BASE)
1984 | lwz PC, FRAME_PC(BASE)
1987 | stfd FARG1, 0(BASE)
1991 |.macro math_minmax, name, ismax
1995 | addi TMP1, BASE, 8
1996 | add TMP2, BASE, NARGS8:RC
1998 |1: // Handle integers.
1999 | lwz CARG4, 0(TMP1)
2000 | cmplw cr1, TMP1, TMP2
2001 | lwz CARG2, 4(TMP1)
2002 | bge cr1, ->fff_resi
2004 | xoris TMP0, CARG1, 0x8000
2005 | xoris TMP3, CARG2, 0x8000
2007 | subfc TMP3, TMP3, TMP0
2008 | subfe TMP0, TMP0, TMP0
2010 | andc TMP3, TMP3, TMP0
2012 | and TMP3, TMP3, TMP0
2014 | add CARG1, TMP3, CARG2
2016 | rldicl CARG1, CARG1, 0, 32
2018 | addi TMP1, TMP1, 8
2021 | bge ->fff_fallback
2022 | // Convert intermediate result to number and continue below.
2023 | tonum_i FARG1, CARG1
2024 | lfd FARG2, 0(TMP1)
2027 | lfd FARG1, 0(BASE)
2028 | bge ->fff_fallback
2029 |5: // Handle numbers.
2030 | lwz CARG4, 0(TMP1)
2031 | cmplw cr1, TMP1, TMP2
2032 | lfd FARG2, 0(TMP1)
2033 | bge cr1, ->fff_resn
2034 | checknum CARG4; bge >7
2036 | fsub f0, FARG1, FARG2
2037 | addi TMP1, TMP1, 8
2039 | fsel FARG1, f0, FARG1, FARG2
2041 | fsel FARG1, f0, FARG2, FARG1
2044 |7: // Convert integer to number and continue above.
2045 | lwz CARG2, 4(TMP1)
2046 | bne ->fff_fallback
2047 | tonum_i FARG2, CARG2
2053 | lwzx CARG2, BASE, TMP1
2054 | lfdx FARG2, BASE, TMP1
2055 | cmplw cr1, TMP1, NARGS8:RC
2057 | bge cr1, ->fff_resn
2058 | bge ->fff_fallback
2059 | fsub f0, FARG1, FARG2
2060 | addi TMP1, TMP1, 8
2062 | fsel FARG1, f0, FARG1, FARG2
2064 | fsel FARG1, f0, FARG2, FARG1
2070 | math_minmax math_min, 0
2071 | math_minmax math_max, 1
2073 |//-- String library -----------------------------------------------------
2075 |.ffunc string_byte // Only handle the 1-arg case here.
2076 | cmplwi NARGS8:RC, 8
2077 | lwz CARG3, 0(BASE)
2078 | lwz STR:CARG1, 4(BASE)
2079 | bne ->fff_fallback // Need exactly 1 argument.
2081 | bne ->fff_fallback
2082 | lwz TMP0, STR:CARG1->len
2084 | lbz CARG1, STR:CARG1[1] // Access is always ok (NUL at end).
2086 | lwz PC, FRAME_PC(BASE)
2092 | lbz TMP1, STR:CARG1[1] // Access is always ok (NUL at end).
2093 | addic TMP3, TMP0, -1 // RD = ((str->len != 0)+1)*8
2094 | subfe RD, TMP3, TMP0
2095 | stw TMP1, TONUM_LO // Inlined tonum_u f0, TMP1.
2099 | lwz PC, FRAME_PC(BASE)
2100 | fsub f0, f0, TOBIT
2106 |.ffunc string_char // Only handle the 1-arg case here.
2108 | cmplwi NARGS8:RC, 8
2109 | lwz CARG3, 0(BASE)
2112 | bne ->fff_fallback // Exactly 1 argument.
2113 | checknum CARG3; bne ->fff_fallback
2116 | lfd FARG1, 0(BASE)
2117 | bne ->fff_fallback // Exactly 1 argument.
2118 | checknum CARG3; bge ->fff_fallback
2120 | la CARG2, TMPD_BLO
2123 | cmplwi TMP0, 255; bgt ->fff_fallback
2128 | bl extern lj_str_new // (lua_State *L, char *str, size_t l)
2130 | // Returns GCstr *.
2137 | cmplwi NARGS8:RC, 16
2138 | lwz CARG3, 16(BASE)
2143 | lwz STR:CARG1, 4(BASE)
2144 | blt ->fff_fallback
2145 | lwz CARG2, 8(BASE)
2147 | lwz TMP1, 12(BASE)
2155 | lwz TMP2, 20(BASE)
2156 | bne ->fff_fallback
2158 | checknum CARG2; bne ->fff_fallback
2160 | checknum CARG3; bge ->fff_fallback
2163 | checknum CARG2; bge ->fff_fallback
2165 | checkstr TMP0; bne ->fff_fallback
2169 | lwz TMP0, STR:CARG1->len
2170 | cmplw TMP0, TMP2 // len < end? (unsigned compare)
2171 | addi TMP3, TMP2, 1
2174 | cmpwi TMP1, 0 // start <= 0?
2175 | add TMP3, TMP1, TMP0
2178 | sub CARG3, TMP2, TMP1
2179 | addi CARG2, STR:CARG1, #STR-1
2180 | srawi TMP0, CARG3, 31
2181 | addi CARG3, CARG3, 1
2182 | add CARG2, CARG2, TMP1
2183 | andc CARG3, CARG3, TMP0
2185 | rldicl CARG2, CARG2, 0, 32
2186 | rldicl CARG3, CARG3, 0, 32
2190 |5: // Negative end or overflow.
2191 | cmpw TMP0, TMP2 // len >= end? (signed compare)
2192 | add TMP2, TMP0, TMP3 // Negative end: end = end+len+1.
2194 | mr TMP2, TMP0 // Overflow: end = len.
2197 |7: // Negative start or underflow.
2198 | .gpr64 extsw TMP1, TMP1
2199 | addic CARG3, TMP1, -1
2200 | subfe CARG3, CARG3, CARG3
2201 | srawi CARG2, TMP3, 31 // Note: modifies carry.
2202 | andc TMP3, TMP3, CARG3
2203 | andc TMP1, TMP3, CARG2
2204 | addi TMP1, TMP1, 1 // start = 1 + (start ? start+len : 0)
2207 |.macro ffstring_op, name
2208 | .ffunc string_ .. name
2210 | cmplwi NARGS8:RC, 8
2211 | lwz CARG3, 0(BASE)
2212 | lwz STR:CARG2, 4(BASE)
2213 | blt ->fff_fallback
2215 | la SBUF:CARG1, DISPATCH_GL(tmpbuf)(DISPATCH)
2216 | bne ->fff_fallback
2217 | lwz TMP0, SBUF:CARG1->b
2218 | stw L, SBUF:CARG1->L
2221 | stw TMP0, SBUF:CARG1->p
2222 | bl extern lj_buf_putstr_ .. name
2223 | bl extern lj_buf_tostr
2227 |ffstring_op reverse
2231 |//-- Bit library --------------------------------------------------------
2233 |.macro .ffunc_bit, name
2235 | .ffunc_1 bit_..name
2236 | checknum CARG3; bnel ->fff_tobit_fb
2238 | .ffunc_n bit_..name
2239 | fadd FARG1, FARG1, TOBIT
2241 | lwz CARG1, TMPD_LO
2245 |.macro .ffunc_bit_op, name, ins
2247 | addi TMP1, BASE, 8
2248 | add TMP2, BASE, NARGS8:RC
2250 | lwz CARG4, 0(TMP1)
2251 | cmplw cr1, TMP1, TMP2
2253 | lwz CARG2, 4(TMP1)
2255 | lfd FARG1, 0(TMP1)
2257 | bgey cr1, ->fff_resi
2260 | bnel ->fff_bitop_fb
2262 | fadd FARG1, FARG1, TOBIT
2263 | bge ->fff_fallback
2265 | lwz CARG2, TMPD_LO
2267 | ins CARG1, CARG1, CARG2
2268 | addi TMP1, TMP1, 8
2272 |.ffunc_bit_op band, and
2273 |.ffunc_bit_op bor, or
2274 |.ffunc_bit_op bxor, xor
2277 | rotlwi TMP0, CARG1, 8
2278 | rlwimi TMP0, CARG1, 24, 0, 7
2279 | rlwimi TMP0, CARG1, 24, 16, 23
2287 |.macro .ffunc_bit_sh, name, ins, shmod
2289 | .ffunc_2 bit_..name
2290 | checknum CARG3; bnel ->fff_tobit_fb
2291 | // Note: no inline conversion from number for 2nd argument!
2292 | checknum CARG4; bne ->fff_fallback
2294 | .ffunc_nn bit_..name
2295 | fadd FARG1, FARG1, TOBIT
2296 | fadd FARG2, FARG2, TOBIT
2298 | lwz CARG1, TMPD_LO
2300 | lwz CARG2, TMPD_LO
2303 | rlwinm CARG2, CARG2, 0, 27, 31
2307 | ins CRET1, CARG1, CARG2
2311 |.ffunc_bit_sh lshift, slw, 1
2312 |.ffunc_bit_sh rshift, srw, 1
2313 |.ffunc_bit_sh arshift, sraw, 1
2314 |.ffunc_bit_sh rol, rotlw, 0
2315 |.ffunc_bit_sh ror, rotlw, 2
2322 | tonum_i FARG1, CRET1
2325 | lwz PC, FRAME_PC(BASE)
2327 | stfd FARG1, -8(BASE)
2330 |// Fallback FP number to bit conversion.
2333 | lfd FARG1, 0(BASE)
2334 | bgt ->fff_fallback
2335 | fadd FARG1, FARG1, TOBIT
2337 | lwz CARG1, TMPD_LO
2342 | lfd FARG1, 0(TMP1)
2343 | bgt ->fff_fallback
2344 | fadd FARG1, FARG1, TOBIT
2346 | lwz CARG2, TMPD_LO
2350 |//-----------------------------------------------------------------------
2352 |->fff_fallback: // Call fast function fallback handler.
2353 | // BASE = new base, RB = CFUNC, RC = nargs*8
2354 | lp TMP3, CFUNC:RB->f
2355 | add TMP1, BASE, NARGS8:RC
2356 | lwz PC, FRAME_PC(BASE) // Fallback may overwrite PC.
2357 | addi TMP0, TMP1, 8*LUA_MINSTACK
2358 | lwz TMP2, L->maxstack
2359 | stw PC, SAVE_PC // Redundant (but a defined value).
2360 | .toc lp TMP3, 0(TMP3)
2365 | bgt >5 // Need to grow stack.
2367 | bctrl // (lua_State *L)
2368 | // Either throws an error, or recovers and returns -1, 0 or nresults+1.
2373 | bgt ->fff_res // Returned nresults+1?
2374 |1: // Returned 0 or -1: retry fast path.
2376 | lwz LFUNC:RB, FRAME_FUNC(BASE)
2377 | sub NARGS8:RC, TMP0, BASE
2378 | bne ->vm_call_tail // Returned -1?
2379 | ins_callt // Returned 0: retry fast path.
2381 |// Reconstruct previous base for vmeta_call during tailcall.
2383 | andix. TMP0, PC, FRAME_TYPE
2384 | rlwinm TMP1, PC, 0, 0, 28
2387 | decode_RA8 TMP1, INS
2388 | addi TMP1, TMP1, 8
2390 | sub TMP2, BASE, TMP1
2391 | b ->vm_call_dispatch // Resolve again for tailcall.
2393 |5: // Grow stack for fallback handler.
2394 | li CARG2, LUA_MINSTACK
2395 | bl extern lj_state_growstack // (lua_State *L, int n)
2397 | cmpw TMP0, TMP0 // Set 4*cr0+eq to force retry.
2400 |->fff_gcstep: // Call GC step function.
2401 | // BASE = new base, RC = nargs*8
2404 | add TMP0, BASE, NARGS8:RC
2405 | stw PC, SAVE_PC // Redundant (but a defined value).
2408 | bl extern lj_gc_step // (lua_State *L)
2412 | sub NARGS8:RC, TMP0, BASE
2413 | lwz CFUNC:RB, FRAME_FUNC(BASE)
2416 |//-----------------------------------------------------------------------
2417 |//-- Special dispatch targets -------------------------------------------
2418 |//-----------------------------------------------------------------------
2420 |->vm_record: // Dispatch target for recording phase.
2422 | lbz TMP3, DISPATCH_GL(hookmask)(DISPATCH)
2423 | andix. TMP0, TMP3, HOOK_VMEVENT // No recording while in vmevent.
2425 | // Decrement the hookcount for consistency, but always do the call.
2426 | lwz TMP2, DISPATCH_GL(hookcount)(DISPATCH)
2427 | andix. TMP0, TMP3, HOOK_ACTIVE
2429 | subi TMP2, TMP2, 1
2430 | andi. TMP0, TMP3, LUA_MASKLINE|LUA_MASKCOUNT
2432 | stw TMP2, DISPATCH_GL(hookcount)(DISPATCH)
2436 |->vm_rethook: // Dispatch target for return hooks.
2437 | lbz TMP3, DISPATCH_GL(hookmask)(DISPATCH)
2438 | andix. TMP0, TMP3, HOOK_ACTIVE // Hook already active?
2440 |5: // Re-dispatch to static ins.
2441 | addi TMP1, TMP1, GG_DISP2STATIC // Assumes decode_OPP TMP1, INS.
2442 | lpx TMP0, DISPATCH, TMP1
2446 |->vm_inshook: // Dispatch target for instr/line hooks.
2447 | lbz TMP3, DISPATCH_GL(hookmask)(DISPATCH)
2448 | lwz TMP2, DISPATCH_GL(hookcount)(DISPATCH)
2449 | andix. TMP0, TMP3, HOOK_ACTIVE // Hook already active?
2450 | rlwinm TMP0, TMP3, 31-LUA_HOOKLINE, 31, 0
2453 | cmpwi cr1, TMP0, 0
2454 | addic. TMP2, TMP2, -1
2456 | stw TMP2, DISPATCH_GL(hookcount)(DISPATCH)
2461 | stw MULTRES, SAVE_MULTRES
2464 | // SAVE_PC must hold the _previous_ PC. The callee updates it with PC.
2465 | bl extern lj_dispatch_ins // (lua_State *L, const BCIns *pc)
2468 |4: // Re-dispatch to static ins.
2470 | decode_OPP TMP1, INS
2471 | decode_RB8 RB, INS
2472 | addi TMP1, TMP1, GG_DISP2STATIC
2473 | decode_RD8 RD, INS
2474 | lpx TMP0, DISPATCH, TMP1
2475 | decode_RA8 RA, INS
2476 | decode_RC8 RC, INS
2480 |->cont_hook: // Continue from hook yield.
2482 | lwz MULTRES, -20(RB) // Restore MULTRES for *M ins.
2485 |->vm_hotloop: // Hot loop counter underflow.
2487 | lwz LFUNC:TMP1, FRAME_FUNC(BASE)
2488 | addi CARG1, DISPATCH, GG_DISP2J
2490 | lwz TMP1, LFUNC:TMP1->pc
2492 | stw L, DISPATCH_J(L)(DISPATCH)
2493 | lbz TMP1, PC2PROTO(framesize)(TMP1)
2495 | slwi TMP1, TMP1, 3
2496 | add TMP1, BASE, TMP1
2498 | bl extern lj_trace_hot // (jit_State *J, const BCIns *pc)
2502 |->vm_callhook: // Dispatch target for call hooks.
2508 |->vm_hotcall: // Hot call counter underflow.
2513 | add TMP0, BASE, RC
2519 | bl extern lj_dispatch_call // (lua_State *L, const BCIns *pc)
2520 | // Returns ASMFunction.
2523 | stw ZERO, SAVE_PC // Invalidate for subsequent line hook.
2524 | sub NARGS8:RC, TMP0, BASE
2526 | lwz LFUNC:RB, FRAME_FUNC(BASE)
2531 |->cont_stitch: // Trace stitching.
2533 | // RA = resultptr, RB = meta base
2535 | lwz TMP3, -20(RB) // Save previous trace number.
2536 | addic. TMP1, MULTRES, -8
2537 | decode_RA8 RC, INS // Call base.
2539 |1: // Move results down.
2541 | addic. TMP1, TMP1, -8
2543 | stfdx f0, BASE, RC
2547 | decode_RA8 RA, INS
2548 | decode_RB8 RB, INS
2550 | lwz TMP1, DISPATCH_J(trace)(DISPATCH)
2553 | bgt >9 // More results wanted?
2555 | slwi TMP2, TMP3, 2
2556 | lwzx TRACE:TMP2, TMP1, TMP2
2557 | cmpwi TRACE:TMP2, 0
2559 | lhz RD, TRACE:TMP2->link
2562 | beq ->cont_nop // Blacklisted.
2564 | bne cr1, =>BC_JLOOP // Jump to stitched trace.
2566 | // Stitch a new trace to the previous trace.
2567 | stw TMP3, DISPATCH_J(exitno)(DISPATCH)
2568 | stp L, DISPATCH_J(L)(DISPATCH)
2570 | addi CARG1, DISPATCH, GG_DISP2J
2572 | bl extern lj_dispatch_stitch // (jit_State *J, const BCIns *pc)
2577 | stwx TISNIL, BASE, RC
2582 |->vm_profhook: // Dispatch target for profiler hook.
2585 | stw MULTRES, SAVE_MULTRES
2588 | bl extern lj_dispatch_profile // (lua_State *L, const BCIns *pc)
2589 | // HOOK_PROFILE is off again, so re-dispatch to dynamic instruction.
2595 |//-----------------------------------------------------------------------
2596 |//-- Trace exit handler -------------------------------------------------
2597 |//-----------------------------------------------------------------------
2599 |.macro savex_, a, b, c, d
2600 | stfd f..a, 16+a*8(sp)
2601 | stfd f..b, 16+b*8(sp)
2602 | stfd f..c, 16+c*8(sp)
2603 | stfd f..d, 16+d*8(sp)
2608 | addi sp, sp, -(16+32*8+32*4)
2609 | stmw r2, 16+32*8+2*4(sp)
2610 | addi DISPATCH, JGL, -GG_DISP2G-32768
2611 | li CARG2, ~LJ_VMST_EXIT
2612 | lwz CARG1, 16+32*8+32*4(sp) // Get stack chain.
2613 | stw CARG2, DISPATCH_GL(vmstate)(DISPATCH)
2615 | stw CARG1, 0(sp) // Store extended stack chain.
2618 | addi CARG2, sp, 16+32*8+32*4 // Recompute original value of sp.
2620 | stw CARG2, 16+32*8+1*4(sp) // Store sp in RID_SP.
2621 | savex_ 12,13,14,15
2624 | savex_ 16,17,18,19
2625 | stw TMP1, 16+32*8+0*4(sp) // Clear RID_TMP.
2626 | savex_ 20,21,22,23
2627 | lhz CARG4, 2(CARG3) // Load trace number.
2628 | savex_ 24,25,26,27
2629 | lwz L, DISPATCH_GL(cur_L)(DISPATCH)
2630 | savex_ 28,29,30,31
2631 | sub CARG3, TMP0, CARG3 // Compute exit number.
2632 | lp BASE, DISPATCH_GL(jit_base)(DISPATCH)
2633 | srwi CARG3, CARG3, 2
2634 | stp L, DISPATCH_J(L)(DISPATCH)
2635 | subi CARG3, CARG3, 2
2637 | stw CARG4, DISPATCH_J(parent)(DISPATCH)
2638 | stw TMP1, DISPATCH_GL(jit_base)(DISPATCH)
2639 | addi CARG1, DISPATCH, GG_DISP2J
2640 | stw CARG3, DISPATCH_J(exitno)(DISPATCH)
2641 | addi CARG2, sp, 16
2642 | bl extern lj_trace_exit // (jit_State *J, ExitState *ex)
2643 | // Returns MULTRES (unscaled) or negated error code.
2644 | lp TMP1, L->cframe
2648 | rldicr sp, TMP1, 0, 61
2650 | rlwinm sp, TMP1, 0, 0, 29
2652 | lwz PC, SAVE_PC // Get SAVE_PC.
2654 | stw L, SAVE_L // Set SAVE_L (on-trace resume/yield).
2659 | // CARG1 = MULTRES or negated error code, BASE, PC and JGL set.
2661 | addi DISPATCH, JGL, -GG_DISP2G-32768
2665 | blt >9 // Check for error from exit.
2666 | lwz LFUNC:RB, FRAME_FUNC(BASE)
2667 | slwi MULTRES, CARG1, 3
2669 | stw MULTRES, SAVE_MULTRES
2670 | lwz TMP1, LFUNC:RB->pc
2671 | stw TMP2, DISPATCH_GL(jit_base)(DISPATCH)
2672 | lwz KBASE, PC2PROTO(k)(TMP1)
2673 | // Setup type comparison constants.
2674 | li TISNUM, LJ_TISNUM
2675 | lus TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float).
2678 | ori TMP3, TMP3, 0x0004 // TONUM = 2^52 + 2^51 + 2^31 (float).
2681 | lus TMP0, 0x4338 // Hiword of 2^52 + 2^51 (double)
2682 | li TISNIL, LJ_TNIL
2683 | stw TMP0, TONUM_HI
2685 | // Modified copy of ins_next which handles function header dispatch, too.
2688 | // Assumes TISNIL == ~LJ_VMST_INTERP == -1.
2689 | stw TISNIL, DISPATCH_GL(vmstate)(DISPATCH)
2690 | decode_OPP TMP1, INS
2691 | decode_RA8 RA, INS
2692 | lpx TMP0, DISPATCH, TMP1
2694 | cmplwi TMP1, BC_FUNCF*4 // Function header?
2696 | decode_RB8 RB, INS
2697 | decode_RD8 RD, INS
2698 | decode_RC8 RC, INS
2701 | cmplwi TMP1, (BC_FUNCC+2)*4 // Fast function?
2703 | // Check frame below fast function.
2704 | lwz TMP1, FRAME_PC(BASE)
2705 | andix. TMP0, TMP1, FRAME_TYPE
2706 | bney >3 // Trace stitching continuation?
2707 | // Otherwise set KBASE for Lua function below fast function.
2708 | lwz TMP2, -4(TMP1)
2709 | decode_RA8 TMP0, TMP2
2710 | sub TMP1, BASE, TMP0
2711 | lwz LFUNC:TMP2, -12(TMP1)
2712 | lwz TMP1, LFUNC:TMP2->pc
2713 | lwz KBASE, PC2PROTO(k)(TMP1)
2715 | subi RC, MULTRES, 8
2719 |9: // Rethrow error from the right C frame.
2722 | bl extern lj_err_throw // (lua_State *L, int errcode)
2725 |//-----------------------------------------------------------------------
2726 |//-- Math helper functions ----------------------------------------------
2727 |//-----------------------------------------------------------------------
2729 |// NYI: Use internal implementations of floor, ceil, trunc.
2732 | divwo. TMP0, CARG1, CARG2
2735 | xor CARG3, CARG1, CARG2
2738 | xor. CARG3, CARG1, CARG2
2740 | mullw TMP0, TMP0, CARG2
2741 | sub CARG1, CARG1, TMP0
2743 | cmpwi CARG1, 0; beqlr
2744 | add CARG1, CARG1, CARG2
2750 | clrso TMP0 // Clear SO for -2147483648 % -1 and return 0.
2753 |//-----------------------------------------------------------------------
2754 |//-- Miscellaneous functions --------------------------------------------
2755 |//-----------------------------------------------------------------------
2757 |// void lj_vm_cachesync(void *start, void *end)
2758 |// Flush D-Cache and invalidate I-Cache. Assumes 32 byte cache line size.
2759 |// This is a good lower bound, except for very ancient PPC models.
2762 | // Compute start of first cache line and number of cache lines.
2763 | rlwinm CARG1, CARG1, 0, 0, 26
2764 | sub CARG2, CARG2, CARG1
2765 | addi CARG2, CARG2, 31
2766 | rlwinm. CARG2, CARG2, 27, 5, 31
2770 |1: // Flush D-Cache.
2772 | addi CARG1, CARG1, 32
2776 |1: // Invalidate I-Cache.
2778 | addi CARG3, CARG3, 32
2784 |//-----------------------------------------------------------------------
2785 |//-- FFI helper functions -----------------------------------------------
2786 |//-----------------------------------------------------------------------
2788 |// Handler for callback functions. Callback slot number in r11, g in r12.
2791 |.type CTSTATE, CTState, PC
2793 | lwz CTSTATE, GL:r12->ctype_state
2794 | addi DISPATCH, r12, GG_G2DISP
2795 | stw r11, CTSTATE->cb.slot
2796 | stw r3, CTSTATE->cb.gpr[0]
2797 | stfd f1, CTSTATE->cb.fpr[0]
2798 | stw r4, CTSTATE->cb.gpr[1]
2799 | stfd f2, CTSTATE->cb.fpr[1]
2800 | stw r5, CTSTATE->cb.gpr[2]
2801 | stfd f3, CTSTATE->cb.fpr[2]
2802 | stw r6, CTSTATE->cb.gpr[3]
2803 | stfd f4, CTSTATE->cb.fpr[3]
2804 | stw r7, CTSTATE->cb.gpr[4]
2805 | stfd f5, CTSTATE->cb.fpr[4]
2806 | stw r8, CTSTATE->cb.gpr[5]
2807 | stfd f6, CTSTATE->cb.fpr[5]
2808 | stw r9, CTSTATE->cb.gpr[6]
2809 | stfd f7, CTSTATE->cb.fpr[6]
2810 | stw r10, CTSTATE->cb.gpr[7]
2811 | stfd f8, CTSTATE->cb.fpr[7]
2812 | addi TMP0, sp, CFRAME_SPACE+8
2813 | stw TMP0, CTSTATE->cb.stack
2815 | stw CTSTATE, SAVE_PC // Any value outside of bytecode is ok.
2817 | bl extern lj_ccallback_enter // (CTState *cts, void *cf)
2818 | // Returns lua_State *.
2819 | lp BASE, L:CRET1->base
2820 | li TISNUM, LJ_TISNUM // Setup type comparison constants.
2821 | lp RC, L:CRET1->top
2822 | lus TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float).
2826 | lus TMP0, 0x4338 // Hiword of 2^52 + 2^51 (double)
2827 | lwz LFUNC:RB, FRAME_FUNC(BASE)
2828 | ori TMP3, TMP3, 0x0004 // TONUM = 2^52 + 2^51 + 2^31 (float).
2829 | stw TMP0, TONUM_HI
2830 | li TISNIL, LJ_TNIL
2840 |->cont_ffi_callback: // Return from FFI callback.
2842 | lwz CTSTATE, DISPATCH_GL(ctype_state)(DISPATCH)
2848 | bl extern lj_ccallback_leave // (CTState *cts, TValue *o)
2849 | lwz CRET1, CTSTATE->cb.gpr[0]
2850 | lfd FARG1, CTSTATE->cb.fpr[0]
2851 | lwz CRET2, CTSTATE->cb.gpr[1]
2855 |->vm_ffi_call: // Call C function via FFI.
2856 | // Caveat: needs special frame unwinding, see below.
2858 | .type CCSTATE, CCallState, CARG1
2859 | lwz TMP1, CCSTATE->spadj
2861 | lbz CARG2, CCSTATE->nsp
2862 | lbz CARG3, CCSTATE->nfpr
2865 | cmpwi cr1, CARG3, 0
2867 | addic. CARG2, CARG2, -1
2868 | stwux sp, sp, TMP1
2869 | crnot 4*cr1+eq, 4*cr1+eq // For vararg calls.
2871 | stw CCSTATE, -8(TMP2)
2873 | la TMP1, CCSTATE->stack
2874 | slwi CARG2, CARG2, 2
2878 | lwzx TMP0, TMP1, CARG2
2879 | stwx TMP0, TMP2, CARG2
2880 | addic. CARG2, CARG2, -4
2884 | lfd f1, CCSTATE->fpr[0]
2885 | lfd f2, CCSTATE->fpr[1]
2886 | lfd f3, CCSTATE->fpr[2]
2887 | lfd f4, CCSTATE->fpr[3]
2888 | lfd f5, CCSTATE->fpr[4]
2889 | lfd f6, CCSTATE->fpr[5]
2890 | lfd f7, CCSTATE->fpr[6]
2891 | lfd f8, CCSTATE->fpr[7]
2893 | lp TMP0, CCSTATE->func
2894 | lwz CARG2, CCSTATE->gpr[1]
2895 | lwz CARG3, CCSTATE->gpr[2]
2896 | lwz CARG4, CCSTATE->gpr[3]
2897 | lwz CARG5, CCSTATE->gpr[4]
2899 | lwz r8, CCSTATE->gpr[5]
2900 | lwz r9, CCSTATE->gpr[6]
2901 | lwz r10, CCSTATE->gpr[7]
2902 | lwz CARG1, CCSTATE->gpr[0] // Do this last, since CCSTATE is CARG1.
2904 | lwz CCSTATE:TMP1, -8(r14)
2907 | stw CARG1, CCSTATE:TMP1->gpr[0]
2908 | stfd FARG1, CCSTATE:TMP1->fpr[0]
2909 | stw CARG2, CCSTATE:TMP1->gpr[1]
2911 | stw CARG3, CCSTATE:TMP1->gpr[2]
2913 | stw CARG4, CCSTATE:TMP1->gpr[3]
2917 |// Note: vm_ffi_call must be the last function in this object file!
2919 |//-----------------------------------------------------------------------
2922 /* Generate the code for a single instruction. */
2923 static void build_ins(BuildCtx *ctx, BCOp op, int defop)
2930 /* -- Comparison ops ---------------------------------------------------- */
2932 /* Remember: all ops branch for a true comparison, fall through otherwise. */
2934 case BC_ISLT: case BC_ISGE: case BC_ISLE: case BC_ISGT:
2935 | // RA = src1*8, RD = src2*8, JMP with RD = target
2937 | lwzux TMP0, RA, BASE
2940 | lwzux TMP1, RD, BASE
2942 | checknum cr0, TMP0
2944 | decode_RD4 TMP2, TMP2
2945 | checknum cr1, TMP1
2946 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
2950 if (op == BC_ISLT) {
2952 } else if (op == BC_ISGE) {
2954 } else if (op == BC_ISLE) {
2964 |7: // RA is not an integer.
2965 | bgt cr0, ->vmeta_comp
2966 | // RA is a number.
2968 | bgt cr1, ->vmeta_comp
2970 | // RA is a number, RD is an integer.
2974 |8: // RA is an integer, RD is not an integer.
2975 | bgt cr1, ->vmeta_comp
2976 | // RA is an integer, RD is a number.
2982 if (op == BC_ISLT) {
2984 } else if (op == BC_ISGE) {
2986 } else if (op == BC_ISLE) {
2987 | cror 4*cr0+lt, 4*cr0+lt, 4*cr0+eq
2990 | cror 4*cr0+lt, 4*cr0+lt, 4*cr0+eq
2995 | lwzx TMP0, BASE, RA
2998 | lwzx TMP1, BASE, RD
2999 | checknum cr0, TMP0
3002 | checknum cr1, TMP1
3003 | decode_RD4 TMP2, TMP2
3004 | bge cr0, ->vmeta_comp
3005 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
3006 | bge cr1, ->vmeta_comp
3008 if (op == BC_ISLT) {
3010 } else if (op == BC_ISGE) {
3012 } else if (op == BC_ISLE) {
3013 | cror 4*cr0+lt, 4*cr0+lt, 4*cr0+eq
3016 | cror 4*cr0+lt, 4*cr0+lt, 4*cr0+eq
3025 case BC_ISEQV: case BC_ISNEV:
3026 vk = op == BC_ISEQV;
3027 | // RA = src1*8, RD = src2*8, JMP with RD = target
3029 | lwzux TMP0, RA, BASE
3032 | lwzux TMP1, RD, BASE
3033 | checknum cr0, TMP0
3035 | checknum cr1, TMP1
3036 | decode_RD4 TMP2, TMP2
3038 | cror 4*cr7+gt, 4*cr0+gt, 4*cr1+gt
3039 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
3041 | ble cr7, ->BC_ISEQN_Z
3043 | ble cr7, ->BC_ISNEN_Z
3046 | lwzux TMP0, RA, BASE
3050 | lwzux TMP1, RD, BASE
3051 | checknum cr0, TMP0
3052 | decode_RD4 TMP2, TMP2
3054 | checknum cr1, TMP1
3055 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
3069 |5: // Either or both types are not numbers.
3075 | cmpwi cr7, TMP0, LJ_TCDATA
3076 | cmpwi cr5, TMP1, LJ_TCDATA
3080 | cmplwi cr1, TMP3, ~LJ_TISPRI // Primitive?
3082 | cror 4*cr7+eq, 4*cr7+eq, 4*cr5+eq
3084 | cmplwi cr6, TMP3, ~LJ_TISTABUD // Table or userdata?
3086 | beq cr7, ->vmeta_equal_cd
3088 | cmplw cr5, CARG2, CARG3
3089 | crandc 4*cr0+gt, 4*cr0+eq, 4*cr1+gt // 2: Same type and primitive.
3090 | crorc 4*cr0+lt, 4*cr5+eq, 4*cr0+eq // 1: Same tv or different type.
3091 | crand 4*cr0+eq, 4*cr0+eq, 4*cr5+eq // 0: Same type and same tv.
3093 | cror 4*cr0+eq, 4*cr0+eq, 4*cr0+gt // 0 or 2.
3094 | cror 4*cr0+lt, 4*cr0+lt, 4*cr0+gt // 1 or 2.
3105 | bge cr0, >2 // Done if 1 or 2.
3110 | blt cr0, <1 // Done if 1 or 2.
3112 | blt cr6, <1 // Done if not tab/ud.
3114 | // Different tables or userdatas. Need to check __eq metamethod.
3115 | // Field metatable must be at same offset for GCtab and GCudata!
3116 | lwz TAB:TMP2, TAB:CARG2->metatable
3117 | li CARG4, 1-vk // ne = 0 or 1.
3118 | cmplwi TAB:TMP2, 0
3119 | beq <1 // No metatable?
3120 | lbz TMP2, TAB:TMP2->nomm
3121 | andix. TMP2, TMP2, 1<<MM_eq
3122 | bne <1 // Or 'no __eq' flag set?
3123 | mr PC, SAVE0 // Restore old PC.
3124 | b ->vmeta_equal // Handle __eq metamethod.
3127 case BC_ISEQS: case BC_ISNES:
3128 vk = op == BC_ISEQS;
3129 | // RA = src*8, RD = str_const*8 (~), JMP with RD = target
3130 | lwzux TMP0, RA, BASE
3132 | lwz STR:TMP3, 4(RA)
3137 | cmpwi TMP0, LJ_TCDATA
3139 | lwzx STR:TMP1, KBASE, RD // KBASE-4-str_const*4
3140 | .gpr64 extsw TMP0, TMP0
3141 | subfic TMP0, TMP0, LJ_TSTR
3143 | beq ->vmeta_equal_cd
3145 | sub TMP1, STR:TMP1, STR:TMP3
3146 | or TMP0, TMP0, TMP1
3147 | decode_RD4 TMP2, TMP2
3148 | subfic TMP0, TMP0, 0
3149 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
3150 | subfe TMP1, TMP1, TMP1
3152 | andc TMP2, TMP2, TMP1
3154 | and TMP2, TMP2, TMP1
3160 case BC_ISEQN: case BC_ISNEN:
3161 vk = op == BC_ISEQN;
3162 | // RA = src*8, RD = num_const*8, JMP with RD = target
3164 | lwzux TMP0, RA, BASE
3167 | lwzux TMP1, RD, KBASE
3168 | checknum cr0, TMP0
3170 | checknum cr1, TMP1
3171 | decode_RD4 TMP2, TMP2
3173 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
3185 |->BC_ISEQN_Z: // Dummy label.
3187 |->BC_ISNEN_Z: // Dummy label.
3189 | lwzx TMP0, BASE, RA
3193 | lfdx f1, KBASE, RD
3194 | decode_RD4 TMP2, TMP2
3196 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
3219 | cmpwi TMP0, LJ_TCDATA
3220 | beq ->vmeta_equal_cd
3224 |7: // RA is not an integer.
3226 | // RA is a number.
3229 | // RA is a number, RD is an integer.
3233 |8: // RA is an integer, RD is a number.
3243 case BC_ISEQP: case BC_ISNEP:
3244 vk = op == BC_ISEQP;
3245 | // RA = src*8, RD = primitive_type*8 (~), JMP with RD = target
3246 | lwzx TMP0, BASE, RA
3252 | cmpwi TMP0, LJ_TCDATA
3254 | sub TMP0, TMP0, TMP1
3256 | beq ->vmeta_equal_cd
3258 | decode_RD4 TMP2, TMP2
3259 | .gpr64 extsw TMP0, TMP0
3260 | addic TMP0, TMP0, -1
3261 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
3262 | subfe TMP1, TMP1, TMP1
3264 | and TMP2, TMP2, TMP1
3266 | andc TMP2, TMP2, TMP1
3272 /* -- Unary test and copy ops ------------------------------------------- */
3274 case BC_ISTC: case BC_ISFC: case BC_IST: case BC_ISF:
3275 | // RA = dst*8 or unused, RD = src*8, JMP with RD = target
3276 | lwzx TMP0, BASE, RD
3279 if (op == BC_IST || op == BC_ISF) {
3280 | .gpr64 extsw TMP0, TMP0
3281 | subfic TMP0, TMP0, LJ_TTRUE
3282 | decode_RD4 TMP2, INS
3283 | subfe TMP1, TMP1, TMP1
3284 | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
3286 | andc TMP2, TMP2, TMP1
3288 | and TMP2, TMP2, TMP1
3292 | li TMP1, LJ_TFALSE
3295 if (op == BC_ISTC) {
3300 | addis PC, PC, -(BCBIAS_J*4 >> 16)
3301 | decode_RD4 TMP2, INS
3302 | stfdx f0, BASE, RA
3310 | // RA = src*8, RD = -type*8
3311 | lwzx TMP0, BASE, RA
3314 |.if not PPE and not GPR64
3315 | add. TMP0, TMP0, TMP1
3320 | bne ->vmeta_istype
3324 | // RA = src*8, RD = -(TISNUM-1)*8
3325 | lwzx TMP0, BASE, RA
3328 | bge ->vmeta_istype
3332 /* -- Unary ops --------------------------------------------------------- */
3335 | // RA = dst*8, RD = src*8
3338 | stfdx f0, BASE, RA
3342 | // RA = dst*8, RD = src*8
3344 | lwzx TMP0, BASE, RD
3345 | .gpr64 extsw TMP0, TMP0
3346 | subfic TMP1, TMP0, LJ_TTRUE
3347 | adde TMP0, TMP0, TMP1
3348 | stwx TMP0, BASE, RA
3352 | // RA = dst*8, RD = src*8
3353 | lwzux TMP1, RD, BASE
3369 | stwux TISNUM, RA, BASE
3375 | // Potential overflow.
3376 | checkov TMP1, <1 // Ignore unrelated overflow.
3378 | lus TMP1, 0x41e0 // 2^31.
3384 | xoris TMP1, TMP1, 0x8000
3387 | stwux TMP1, RA, BASE
3396 | // RA = dst*8, RD = src*8
3397 | lwzux TMP0, RD, BASE
3399 | checkstr TMP0; bne >2
3400 | lwz CRET1, STR:CARG1->len
3404 | stwux TISNUM, RA, BASE
3407 | tonum_u f0, CRET1 // Result is a non-negative integer.
3409 | stfdx f0, BASE, RA
3413 | checktab TMP0; bne ->vmeta_len
3415 | lwz TAB:TMP2, TAB:CARG1->metatable
3416 | cmplwi TAB:TMP2, 0
3421 | bl extern lj_tab_len // (GCtab *t)
3422 | // Returns uint32_t (but less than 2^31).
3426 | lbz TMP0, TAB:TMP2->nomm
3427 | andix. TMP0, TMP0, 1<<MM_len
3428 | bne <3 // 'no __len' flag set: done.
3433 /* -- Binary ops -------------------------------------------------------- */
3435 |.macro ins_arithpre
3436 | // RA = dst*8, RB = src1*8, RC = src2*8 | num_const*8
3437 ||vk = ((int)op - BC_ADDVN) / (BC_ADDNV-BC_ADDVN);
3440 | lwzx TMP1, BASE, RB
3442 | lwzx TMP2, KBASE, RC
3444 | lfdx f14, BASE, RB
3445 | lfdx f15, KBASE, RC
3447 | checknum cr0, TMP1
3448 | checknum cr1, TMP2
3449 | crand 4*cr0+lt, 4*cr0+lt, 4*cr1+lt
3450 | bge ->vmeta_arith_vn
3452 | checknum TMP1; bge ->vmeta_arith_vn
3456 | lwzx TMP1, BASE, RB
3458 | lwzx TMP2, KBASE, RC
3460 | lfdx f15, BASE, RB
3461 | lfdx f14, KBASE, RC
3463 | checknum cr0, TMP1
3464 | checknum cr1, TMP2
3465 | crand 4*cr0+lt, 4*cr0+lt, 4*cr1+lt
3466 | bge ->vmeta_arith_nv
3468 | checknum TMP1; bge ->vmeta_arith_nv
3472 | lwzx TMP1, BASE, RB
3473 | lwzx TMP2, BASE, RC
3474 | lfdx f14, BASE, RB
3475 | lfdx f15, BASE, RC
3476 | checknum cr0, TMP1
3477 | checknum cr1, TMP2
3478 | crand 4*cr0+lt, 4*cr0+lt, 4*cr1+lt
3479 | bge ->vmeta_arith_vv
3484 |.macro ins_arithfallback, ins
3487 | ins ->vmeta_arith_vn2
3490 | ins ->vmeta_arith_nv2
3493 | ins ->vmeta_arith_vv2
3498 |.macro intmod, a, b, c
3502 |.macro fpmod, a, b, c
3505 | // NYI: Use internal implementation of floor.
3506 | blex floor // floor(b/c)
3508 | fsub a, b, a // b - floor(b/c)*c
3511 |.macro ins_arithfp, fpins
3513 |.if "fpins" == "fpmod_"
3514 | b ->BC_MODVN_Z // Avoid 3 copies. It's slow anyway.
3516 | fpins f0, f14, f15
3518 | stfdx f0, BASE, RA
3523 |.macro ins_arithdn, intins, fpins
3524 | // RA = dst*8, RB = src1*8, RC = src2*8 | num_const*8
3525 ||vk = ((int)op - BC_ADDVN) / (BC_ADDNV-BC_ADDVN);
3528 | lwzux TMP1, RB, BASE
3529 | lwzux TMP2, RC, KBASE
3531 | checknum cr0, TMP1
3535 | lwzux TMP1, RB, BASE
3536 | lwzux TMP2, RC, KBASE
3538 | checknum cr0, TMP1
3542 | lwzux TMP1, RB, BASE
3543 | lwzux TMP2, RC, BASE
3545 | checknum cr0, TMP1
3549 | checknum cr1, TMP2
3552 | intins CARG1, CARG1, CARG2
3556 | stwux TISNUM, RA, BASE
3561 | checkov TMP0, <1 // Ignore unrelated overflow.
3562 | ins_arithfallback b
3566 | crand 4*cr0+lt, 4*cr0+lt, 4*cr1+lt
3570 | crand 4*cr0+lt, 4*cr0+lt, 4*cr1+lt
3573 | ins_arithfallback bge
3574 |.if "fpins" == "fpmod_"
3575 | b ->BC_MODVN_Z // Avoid 3 copies. It's slow anyway.
3577 | fpins f0, f14, f15
3579 | stfdx f0, BASE, RA
3584 |.macro ins_arith, intins, fpins
3586 | ins_arithdn intins, fpins
3592 case BC_ADDVN: case BC_ADDNV: case BC_ADDVV:
3594 |.macro addo32., y, a, b
3595 | // Need to check overflow for (a<<32) + (b<<32).
3596 | rldicr TMP0, a, 32, 31
3597 | rldicr TMP3, b, 32, 31
3598 | addo. TMP0, TMP0, TMP3
3601 | ins_arith addo32., fadd
3603 | ins_arith addo., fadd
3606 case BC_SUBVN: case BC_SUBNV: case BC_SUBVV:
3608 |.macro subo32., y, a, b
3609 | // Need to check overflow for (a<<32) - (b<<32).
3610 | rldicr TMP0, a, 32, 31
3611 | rldicr TMP3, b, 32, 31
3612 | subo. TMP0, TMP0, TMP3
3615 | ins_arith subo32., fsub
3617 | ins_arith subo., fsub
3620 case BC_MULVN: case BC_MULNV: case BC_MULVV:
3621 | ins_arith mullwo., fmul
3623 case BC_DIVVN: case BC_DIVNV: case BC_DIVVV:
3627 | ins_arith intmod, fpmod
3629 case BC_MODNV: case BC_MODVV:
3630 | ins_arith intmod, fpmod_
3633 | // NYI: (partial) integer arithmetic.
3634 | lwzx TMP1, BASE, RB
3635 | lfdx FARG1, BASE, RB
3636 | lwzx TMP2, BASE, RC
3637 | lfdx FARG2, BASE, RC
3638 | checknum cr0, TMP1
3639 | checknum cr1, TMP2
3640 | crand 4*cr0+lt, 4*cr0+lt, 4*cr1+lt
3641 | bge ->vmeta_arith_vv
3644 | stfdx FARG1, BASE, RA
3649 | // RA = dst*8, RB = src_start*8, RC = src_end*8
3652 | add CARG2, BASE, RC
3657 | srwi CARG3, CARG3, 3
3658 | bl extern lj_meta_cat // (lua_State *L, TValue *top, int left)
3659 | // Returns NULL (finished) or TValue * (metamethod).
3664 | lfdx f0, BASE, SAVE0 // Copy result from RB to RA.
3665 | stfdx f0, BASE, RA
3669 /* -- Constant ops ------------------------------------------------------ */
3672 | // RA = dst*8, RD = str_const*8 (~)
3674 | subfic TMP1, TMP1, -4
3676 | lwzx TMP0, KBASE, TMP1 // KBASE-4-str_const*4
3678 | stwux TMP2, RA, BASE
3684 | // RA = dst*8, RD = cdata_const*8 (~)
3686 | subfic TMP1, TMP1, -4
3688 | lwzx TMP0, KBASE, TMP1 // KBASE-4-cdata_const*4
3689 | li TMP2, LJ_TCDATA
3690 | stwux TMP2, RA, BASE
3696 | // RA = dst*8, RD = int16_literal*8
3701 | stwux TISNUM, RA, BASE
3705 | // The soft-float approach is faster.
3707 | srawi TMP1, RD, 31
3708 | xor TMP2, TMP1, RD
3709 | sub TMP2, TMP2, TMP1 // TMP2 = abs(x)
3711 | subfic TMP1, TMP3, 0x40d // TMP1 = exponent-1
3712 | slw TMP2, TMP2, TMP3 // TMP2 = left aligned mantissa
3713 | subfic TMP3, RD, 0
3714 | slwi TMP1, TMP1, 20
3715 | rlwimi RD, TMP2, 21, 1, 31 // hi = sign(x) | (mantissa>>11)
3716 | subfe TMP0, TMP0, TMP0
3717 | add RD, RD, TMP1 // hi = hi + exponent-1
3718 | and RD, RD, TMP0 // hi = x == 0 ? 0 : hi
3720 | stwux RD, RA, BASE
3726 | // RA = dst*8, RD = num_const*8
3728 | lfdx f0, KBASE, RD
3729 | stfdx f0, BASE, RA
3733 | // RA = dst*8, RD = primitive_type*8 (~)
3737 | stwx TMP0, BASE, RA
3741 | // RA = base*8, RD = end*8
3742 | stwx TISNIL, BASE, RA
3745 | stwx TISNIL, BASE, RA
3752 /* -- Upvalue and function ops ------------------------------------------ */
3755 | // RA = dst*8, RD = uvnum*8
3756 | lwz LFUNC:RB, FRAME_FUNC(BASE)
3758 | addi RD, RD, offsetof(GCfuncL, uvptr)
3759 | lwzx UPVAL:RB, LFUNC:RB, RD
3761 | lwz TMP1, UPVAL:RB->v
3763 | stfdx f0, BASE, RA
3767 | // RA = uvnum*8, RD = src*8
3768 | lwz LFUNC:RB, FRAME_FUNC(BASE)
3770 | addi RA, RA, offsetof(GCfuncL, uvptr)
3771 | lfdux f0, RD, BASE
3772 | lwzx UPVAL:RB, LFUNC:RB, RA
3773 | lbz TMP3, UPVAL:RB->marked
3774 | lwz CARG2, UPVAL:RB->v
3775 | andix. TMP3, TMP3, LJ_GC_BLACK // isblack(uv)
3776 | lbz TMP0, UPVAL:RB->closed
3779 | cmplwi cr1, TMP0, 0
3781 | cror 4*cr0+eq, 4*cr0+eq, 4*cr1+eq
3782 | subi TMP2, TMP2, (LJ_TNUMX+1)
3783 | bne >2 // Upvalue is closed and black?
3787 |2: // Check if new value is collectable.
3788 | cmplwi TMP2, LJ_TISGCV - (LJ_TNUMX+1)
3789 | bge <1 // tvisgcv(v)
3790 | lbz TMP3, GCOBJ:TMP1->gch.marked
3791 | andix. TMP3, TMP3, LJ_GC_WHITES // iswhite(v)
3792 | la CARG1, GG_DISP2G(DISPATCH)
3793 | // Crossed a write barrier. Move the barrier forward.
3795 | bl extern lj_gc_barrieruv // (global_State *g, TValue *tv)
3799 | // RA = uvnum*8, RD = str_const*8 (~)
3800 | lwz LFUNC:RB, FRAME_FUNC(BASE)
3803 | subfic TMP1, TMP1, -4
3804 | addi RA, RA, offsetof(GCfuncL, uvptr)
3805 | lwzx STR:TMP1, KBASE, TMP1 // KBASE-4-str_const*4
3806 | lwzx UPVAL:RB, LFUNC:RB, RA
3807 | lbz TMP3, UPVAL:RB->marked
3808 | lwz CARG2, UPVAL:RB->v
3809 | andix. TMP3, TMP3, LJ_GC_BLACK // isblack(uv)
3810 | lbz TMP3, STR:TMP1->marked
3811 | lbz TMP2, UPVAL:RB->closed
3813 | stw STR:TMP1, 4(CARG2)
3814 | stw TMP0, 0(CARG2)
3819 |2: // Check if string is white and ensure upvalue is closed.
3820 | andix. TMP3, TMP3, LJ_GC_WHITES // iswhite(str)
3821 | cmplwi cr1, TMP2, 0
3822 | cror 4*cr0+eq, 4*cr0+eq, 4*cr1+eq
3823 | la CARG1, GG_DISP2G(DISPATCH)
3824 | // Crossed a write barrier. Move the barrier forward.
3826 | bl extern lj_gc_barrieruv // (global_State *g, TValue *tv)
3830 | // RA = uvnum*8, RD = num_const*8
3831 | lwz LFUNC:RB, FRAME_FUNC(BASE)
3833 | addi RA, RA, offsetof(GCfuncL, uvptr)
3834 | lfdx f0, KBASE, RD
3835 | lwzx UPVAL:RB, LFUNC:RB, RA
3837 | lwz TMP1, UPVAL:RB->v
3842 | // RA = uvnum*8, RD = primitive_type*8 (~)
3843 | lwz LFUNC:RB, FRAME_FUNC(BASE)
3846 | addi RA, RA, offsetof(GCfuncL, uvptr)
3848 | lwzx UPVAL:RB, LFUNC:RB, RA
3850 | lwz TMP1, UPVAL:RB->v
3856 | // RA = level*8, RD = target
3857 | lwz TMP1, L->openupval
3858 | branch_RD // Do this first since RD is not saved.
3863 | add CARG2, BASE, RA
3864 | bl extern lj_func_closeuv // (lua_State *L, TValue *level)
3871 | // RA = dst*8, RD = proto_const*8 (~) (holding function prototype)
3874 | subfic TMP1, TMP1, -4
3876 | lwzx CARG2, KBASE, TMP1 // KBASE-4-tab_const*4
3878 | lwz CARG3, FRAME_FUNC(BASE)
3879 | // (lua_State *L, GCproto *pt, GCfuncL *parent)
3880 | bl extern lj_func_newL_gc
3881 | // Returns GCfuncL *.
3884 | stwux TMP0, RA, BASE
3885 | stw LFUNC:CRET1, 4(RA)
3889 /* -- Table ops --------------------------------------------------------- */
3893 | // RA = dst*8, RD = (hbits|asize)*8 | tab_const*8 (~)
3894 | lwz TMP0, DISPATCH_GL(gc.total)(DISPATCH)
3896 | lwz TMP1, DISPATCH_GL(gc.threshold)(DISPATCH)
3902 if (op == BC_TNEW) {
3903 | rlwinm CARG2, RD, 29, 21, 31
3904 | rlwinm CARG3, RD, 18, 27, 31
3905 | cmpwi CARG2, 0x7ff; beq >3
3907 | bl extern lj_tab_new // (lua_State *L, int32_t asize, uint32_t hbits)
3908 | // Returns Table *.
3911 | subfic TMP1, TMP1, -4
3912 | lwzx CARG2, KBASE, TMP1 // KBASE-4-tab_const*4
3913 | bl extern lj_tab_dup // (lua_State *L, Table *kt)
3914 | // Returns Table *.
3918 | stwux TMP0, RA, BASE
3919 | stw TAB:CRET1, 4(RA)
3921 if (op == BC_TNEW) {
3928 | bl extern lj_gc_step_fixtop // (lua_State *L)
3935 | // RA = dst*8, RD = str_const*8 (~)
3937 | // RA = src*8, RD = str_const*8 (~)
3938 | lwz LFUNC:TMP2, FRAME_FUNC(BASE)
3940 | lwz TAB:RB, LFUNC:TMP2->env
3941 | subfic TMP1, TMP1, -4
3942 | lwzx STR:RC, KBASE, TMP1 // KBASE-4-str_const*4
3943 if (op == BC_GGET) {
3951 | // RA = dst*8, RB = table*8, RC = key*8
3952 | lwzux CARG1, RB, BASE
3953 | lwzux CARG2, RC, BASE
3961 | checknum cr1, CARG2
3964 | lwz TMP0, TAB:RB->asize
3966 | lwz TMP1, TAB:RB->array
3971 | // Convert number key to integer, check for integerness and range.
3973 | fadd f2, f0, TOBIT
3975 | lwz TMP0, TAB:RB->asize
3976 | fsub f2, f2, TOBIT
3978 | lwz TMP1, TAB:RB->array
3980 | cmplw cr0, TMP0, TMP2
3981 | crand 4*cr0+gt, 4*cr0+gt, 4*cr1+eq
3982 | slwi TMP2, TMP2, 3
3984 | ble ->vmeta_tgetv // Integer key and in array part?
3985 | lwzx TMP0, TMP1, TMP2
3986 | lfdx f14, TMP1, TMP2
3987 | checknil TMP0; beq >2
3990 | stfdx f14, BASE, RA
3993 |2: // Check for __index if table value is nil.
3994 | lwz TAB:TMP2, TAB:RB->metatable
3995 | cmplwi TAB:TMP2, 0
3996 | beq <1 // No metatable: done.
3997 | lbz TMP0, TAB:TMP2->nomm
3998 | andix. TMP0, TMP0, 1<<MM_index
3999 | bne <1 // 'no __index' flag set: done.
4003 | checkstr CARG2; bne ->vmeta_tgetv
4007 | b ->BC_TGETS_Z // String key?
4010 | // RA = dst*8, RB = table*8, RC = str_const*8 (~)
4011 | lwzux CARG1, RB, BASE
4014 | subfic TMP1, TMP1, -4
4016 | lwzx STR:RC, KBASE, TMP1 // KBASE-4-str_const*4
4017 | bne ->vmeta_tgets1
4019 | // TAB:RB = GCtab *, STR:RC = GCstr *, RA = dst*8
4020 | lwz TMP0, TAB:RB->hmask
4021 | lwz TMP1, STR:RC->hash
4022 | lwz NODE:TMP2, TAB:RB->node
4023 | and TMP1, TMP1, TMP0 // idx = str->hash & tab->hmask
4024 | slwi TMP0, TMP1, 5
4025 | slwi TMP1, TMP1, 3
4026 | sub TMP1, TMP0, TMP1
4027 | add NODE:TMP2, NODE:TMP2, TMP1 // node = tab->node + (idx*32-idx*8)
4029 | lwz CARG1, NODE:TMP2->key
4030 | lwz TMP0, 4+offsetof(Node, key)(NODE:TMP2)
4031 | lwz CARG2, NODE:TMP2->val
4032 | lwz TMP1, 4+offsetof(Node, val)(NODE:TMP2)
4033 | checkstr CARG1; bne >4
4034 | cmpw TMP0, STR:RC; bne >4
4035 | checknil CARG2; beq >5 // Key found, but nil value?
4037 | stwux CARG2, RA, BASE
4041 |4: // Follow hash chain.
4042 | lwz NODE:TMP2, NODE:TMP2->next
4043 | cmplwi NODE:TMP2, 0
4045 | // End of hash chain: key not found, nil result.
4048 |5: // Check for __index if table value is nil.
4049 | lwz TAB:TMP2, TAB:RB->metatable
4050 | cmplwi TAB:TMP2, 0
4051 | beq <3 // No metatable: done.
4052 | lbz TMP0, TAB:TMP2->nomm
4053 | andix. TMP0, TMP0, 1<<MM_index
4054 | bne <3 // 'no __index' flag set: done.
4058 | // RA = dst*8, RB = table*8, RC = index*8
4059 | lwzux CARG1, RB, BASE
4062 | checktab CARG1; bne ->vmeta_tgetb
4063 | lwz TMP1, TAB:RB->asize
4064 | lwz TMP2, TAB:RB->array
4065 | cmplw TMP0, TMP1; bge ->vmeta_tgetb
4066 | lwzx TMP1, TMP2, RC
4068 | checknil TMP1; beq >5
4071 | stfdx f0, BASE, RA
4074 |5: // Check for __index if table value is nil.
4075 | lwz TAB:TMP2, TAB:RB->metatable
4076 | cmplwi TAB:TMP2, 0
4077 | beq <1 // No metatable: done.
4078 | lbz TMP2, TAB:TMP2->nomm
4079 | andix. TMP2, TMP2, 1<<MM_index
4080 | bne <1 // 'no __index' flag set: done.
4081 | b ->vmeta_tgetb // Caveat: preserve TMP0!
4084 | // RA = dst*8, RB = table*8, RC = key*8
4086 | lwz TAB:CARG1, 4(RB)
4089 | lwz TMP0, TAB:CARG1->asize
4091 | lwz TMP1, TAB:CARG1->array
4094 | lwz TMP0, TAB:CARG1->asize
4096 | lwz TMP1, TAB:CARG1->array
4099 | slwi TMP2, CARG2, 3
4100 | ble ->vmeta_tgetr // In array part?
4101 | lfdx f14, TMP1, TMP2
4104 | stfdx f14, BASE, RA
4109 | // RA = src*8, RB = table*8, RC = key*8
4110 | lwzux CARG1, RB, BASE
4111 | lwzux CARG2, RC, BASE
4119 | checknum cr1, CARG2
4122 | lwz TMP0, TAB:RB->asize
4124 | lwz TMP1, TAB:RB->array
4129 | // Convert number key to integer, check for integerness and range.
4131 | fadd f2, f0, TOBIT
4133 | lwz TMP0, TAB:RB->asize
4134 | fsub f2, f2, TOBIT
4136 | lwz TMP1, TAB:RB->array
4138 | cmplw cr0, TMP0, TMP2
4139 | crand 4*cr0+gt, 4*cr0+gt, 4*cr1+eq
4140 | slwi TMP0, TMP2, 3
4142 | ble ->vmeta_tsetv // Integer key and in array part?
4143 | lwzx TMP2, TMP1, TMP0
4144 | lbz TMP3, TAB:RB->marked
4145 | lfdx f14, BASE, RA
4146 | checknil TMP2; beq >3
4148 | andix. TMP2, TMP3, LJ_GC_BLACK // isblack(table)
4149 | stfdx f14, TMP1, TMP0
4154 |3: // Check for __newindex if previous value is nil.
4155 | lwz TAB:TMP2, TAB:RB->metatable
4156 | cmplwi TAB:TMP2, 0
4157 | beq <1 // No metatable: done.
4158 | lbz TMP2, TAB:TMP2->nomm
4159 | andix. TMP2, TMP2, 1<<MM_newindex
4160 | bne <1 // 'no __newindex' flag set: done.
4164 | checkstr CARG2; bne ->vmeta_tsetv
4168 | b ->BC_TSETS_Z // String key?
4170 |7: // Possible table write barrier for the value. Skip valiswhite check.
4171 | barrierback TAB:RB, TMP3, TMP0
4175 | // RA = src*8, RB = table*8, RC = str_const*8 (~)
4176 | lwzux CARG1, RB, BASE
4179 | subfic TMP1, TMP1, -4
4181 | lwzx STR:RC, KBASE, TMP1 // KBASE-4-str_const*4
4182 | bne ->vmeta_tsets1
4184 | // TAB:RB = GCtab *, STR:RC = GCstr *, RA = src*8
4185 | lwz TMP0, TAB:RB->hmask
4186 | lwz TMP1, STR:RC->hash
4187 | lwz NODE:TMP2, TAB:RB->node
4188 | stb ZERO, TAB:RB->nomm // Clear metamethod cache.
4189 | and TMP1, TMP1, TMP0 // idx = str->hash & tab->hmask
4190 | lfdx f14, BASE, RA
4191 | slwi TMP0, TMP1, 5
4192 | slwi TMP1, TMP1, 3
4193 | sub TMP1, TMP0, TMP1
4194 | lbz TMP3, TAB:RB->marked
4195 | add NODE:TMP2, NODE:TMP2, TMP1 // node = tab->node + (idx*32-idx*8)
4197 | lwz CARG1, NODE:TMP2->key
4198 | lwz TMP0, 4+offsetof(Node, key)(NODE:TMP2)
4199 | lwz CARG2, NODE:TMP2->val
4200 | lwz NODE:TMP1, NODE:TMP2->next
4201 | checkstr CARG1; bne >5
4202 | cmpw TMP0, STR:RC; bne >5
4203 | checknil CARG2; beq >4 // Key found, but nil value?
4205 | andix. TMP0, TMP3, LJ_GC_BLACK // isblack(table)
4206 | stfd f14, NODE:TMP2->val
4211 |4: // Check for __newindex if previous value is nil.
4212 | lwz TAB:TMP1, TAB:RB->metatable
4213 | cmplwi TAB:TMP1, 0
4214 | beq <2 // No metatable: done.
4215 | lbz TMP0, TAB:TMP1->nomm
4216 | andix. TMP0, TMP0, 1<<MM_newindex
4217 | bne <2 // 'no __newindex' flag set: done.
4220 |5: // Follow hash chain.
4221 | cmplwi NODE:TMP1, 0
4222 | mr NODE:TMP2, NODE:TMP1
4224 | // End of hash chain: key not found, add a new one.
4226 | // But check for __newindex first.
4227 | lwz TAB:TMP1, TAB:RB->metatable
4228 | la CARG3, DISPATCH_GL(tmptv)(DISPATCH)
4231 | cmplwi TAB:TMP1, 0
4233 | beq >6 // No metatable: continue.
4234 | lbz TMP0, TAB:TMP1->nomm
4235 | andix. TMP0, TMP0, 1<<MM_newindex
4236 | beq ->vmeta_tsets // 'no __newindex' flag NOT set: check.
4239 | stw STR:RC, 4(CARG3)
4241 | stw TMP0, 0(CARG3)
4242 | bl extern lj_tab_newkey // (lua_State *L, GCtab *t, TValue *k)
4243 | // Returns TValue *.
4245 | stfd f14, 0(CRET1)
4246 | b <3 // No 2nd write barrier needed.
4248 |7: // Possible table write barrier for the value. Skip valiswhite check.
4249 | barrierback TAB:RB, TMP3, TMP0
4253 | // RA = src*8, RB = table*8, RC = index*8
4254 | lwzux CARG1, RB, BASE
4257 | checktab CARG1; bne ->vmeta_tsetb
4258 | lwz TMP1, TAB:RB->asize
4259 | lwz TMP2, TAB:RB->array
4260 | lbz TMP3, TAB:RB->marked
4262 | lfdx f14, BASE, RA
4264 | lwzx TMP1, TMP2, RC
4265 | checknil TMP1; beq >5
4267 | andix. TMP0, TMP3, LJ_GC_BLACK // isblack(table)
4268 | stfdx f14, TMP2, RC
4273 |5: // Check for __newindex if previous value is nil.
4274 | lwz TAB:TMP1, TAB:RB->metatable
4275 | cmplwi TAB:TMP1, 0
4276 | beq <1 // No metatable: done.
4277 | lbz TMP1, TAB:TMP1->nomm
4278 | andix. TMP1, TMP1, 1<<MM_newindex
4279 | bne <1 // 'no __newindex' flag set: done.
4280 | b ->vmeta_tsetb // Caveat: preserve TMP0!
4282 |7: // Possible table write barrier for the value. Skip valiswhite check.
4283 | barrierback TAB:RB, TMP3, TMP0
4287 | // RA = dst*8, RB = table*8, RC = key*8
4289 | lwz TAB:CARG2, 4(RB)
4292 | lbz TMP3, TAB:RB->marked
4293 | lwz TMP0, TAB:CARG2->asize
4295 | lwz TMP1, TAB:CARG2->array
4298 | lbz TMP3, TAB:RB->marked
4299 | lwz TMP0, TAB:CARG2->asize
4301 | lwz TMP1, TAB:CARG2->array
4303 | andix. TMP2, TMP3, LJ_GC_BLACK // isblack(table)
4307 | slwi TMP2, CARG3, 3
4308 | lfdx f14, BASE, RA
4309 | ble ->vmeta_tsetr // In array part?
4311 | stfdx f14, TMP1, TMP2
4314 |7: // Possible table write barrier for the value. Skip valiswhite check.
4315 | barrierback TAB:CARG2, TMP3, TMP2
4321 | // RA = base*8 (table at base-1), RD = num_const*8 (start index)
4324 | add TMP3, KBASE, RD
4325 | lwz TAB:CARG2, -4(RA) // Guaranteed to be a table.
4326 | addic. TMP0, MULTRES, -8
4327 | lwz TMP3, 4(TMP3) // Integer constant is in lo-word.
4328 | srwi CARG3, TMP0, 3
4329 | beq >4 // Nothing to copy?
4330 | add CARG3, CARG3, TMP3
4331 | lwz TMP2, TAB:CARG2->asize
4332 | slwi TMP1, TMP3, 3
4333 | lbz TMP3, TAB:CARG2->marked
4335 | add TMP2, RA, TMP0
4336 | lwz TMP0, TAB:CARG2->array
4338 | add TMP1, TMP1, TMP0
4339 | andix. TMP0, TMP3, LJ_GC_BLACK // isblack(table)
4340 |3: // Copy result slots to table.
4343 | cmpw cr1, RA, TMP2
4345 | addi TMP1, TMP1, 8
4351 |5: // Need to resize array part.
4356 | bl extern lj_tab_reasize // (lua_State *L, GCtab *t, int nasize)
4357 | // Must not reallocate the stack.
4361 |7: // Possible table write barrier for any value. Skip valiswhite check.
4362 | barrierback TAB:CARG2, TMP3, TMP0
4366 /* -- Calls and vararg handling ----------------------------------------- */
4369 | // RA = base*8, (RB = (nresults+1)*8,) RC = extra_nargs*8
4370 | add NARGS8:RC, NARGS8:RC, MULTRES
4371 | // Fall through. Assumes BC_CALL follows.
4374 | // RA = base*8, (RB = (nresults+1)*8,) RC = (nargs+1)*8
4376 | lwzux TMP0, BASE, RA
4377 | lwz LFUNC:RB, 4(BASE)
4378 | subi NARGS8:RC, NARGS8:RC, 8
4379 | addi BASE, BASE, 8
4380 | checkfunc TMP0; bne ->vmeta_call
4385 | // RA = base*8, (RB = 0,) RC = extra_nargs*8
4386 | add NARGS8:RC, NARGS8:RC, MULTRES
4387 | // Fall through. Assumes BC_CALLT follows.
4390 | // RA = base*8, (RB = 0,) RC = (nargs+1)*8
4391 | lwzux TMP0, RA, BASE
4392 | lwz LFUNC:RB, 4(RA)
4393 | subi NARGS8:RC, NARGS8:RC, 8
4394 | lwz TMP1, FRAME_PC(BASE)
4399 | andix. TMP0, TMP1, FRAME_TYPE // Caveat: preserve cr0 until the crand.
4400 | lbz TMP3, LFUNC:RB->ffid
4401 | xori TMP2, TMP1, FRAME_VARG
4402 | cmplwi cr1, NARGS8:RC, 0
4405 | stw LFUNC:RB, FRAME_FUNC(BASE) // Copy function down, but keep PC.
4407 | cmplwi cr7, TMP3, 1 // (> FF_C) Calling a fast function?
4410 | addi TMP3, TMP2, 8
4412 | cmplw cr1, TMP3, NARGS8:RC
4413 | stfdx f0, BASE, TMP2
4417 | crand 4*cr0+eq, 4*cr0+eq, 4*cr7+gt
4422 |5: // Tailcall to a fast function with a Lua frame below.
4424 | decode_RA8 RA, INS
4425 | sub TMP1, BASE, RA
4426 | lwz LFUNC:TMP1, FRAME_FUNC-8(TMP1)
4427 | lwz TMP1, LFUNC:TMP1->pc
4428 | lwz KBASE, PC2PROTO(k)(TMP1) // Need to prepare KBASE.
4431 |7: // Tailcall from a vararg function.
4432 | andix. TMP0, TMP2, FRAME_TYPEP
4433 | bne <1 // Vararg frame below?
4434 | sub BASE, BASE, TMP2 // Relocate BASE down.
4435 | lwz TMP1, FRAME_PC(BASE)
4436 | andix. TMP0, TMP1, FRAME_TYPE
4441 | // RA = base*8, (RB = (nresults+1)*8, RC = (nargs+1)*8 ((2+1)*8))
4443 | add BASE, BASE, RA
4444 | lwz TMP1, -24(BASE)
4445 | lwz LFUNC:RB, -20(BASE)
4448 | stw TMP1, 0(BASE) // Copy callable.
4449 | stw LFUNC:RB, 4(BASE)
4451 | stfd f1, 16(BASE) // Copy control var.
4452 | li NARGS8:RC, 16 // Iterators get 2 arguments.
4453 | stfdu f0, 8(BASE) // Copy state.
4459 | // RA = base*8, (RB = (nresults+1)*8, RC = (nargs+1)*8 (2+1)*8)
4461 | // NYI: add hotloop, record BC_ITERN.
4464 | lwz TAB:RB, -12(RA)
4465 | lwz RC, -4(RA) // Get index from control var.
4466 | lwz TMP0, TAB:RB->asize
4467 | lwz TMP1, TAB:RB->array
4469 |1: // Traverse array part.
4472 | bge >5 // Index points after array part?
4473 | lwzx TMP2, TMP1, TMP3
4474 | lfdx f0, TMP1, TMP3
4485 | addis TMP3, PC, -(BCBIAS_J*4 >> 16)
4487 | decode_RD4 TMP1, INS
4488 | stw RC, -4(RA) // Update control var.
4489 | add PC, TMP1, TMP3
4496 |4: // Skip holes in array part.
4500 |5: // Traverse hash part.
4501 | lwz TMP1, TAB:RB->hmask
4503 | lwz TMP2, TAB:RB->node
4505 | cmplw RC, TMP1 // End of iteration? Branch to ITERL+1.
4509 | sub TMP3, TMP3, RB
4510 | lwzx RB, TMP2, TMP3
4511 | lfdx f0, TMP2, TMP3
4512 | add NODE:TMP3, TMP2, TMP3
4516 | lfd f1, NODE:TMP3->key
4517 | addis TMP2, PC, -(BCBIAS_J*4 >> 16)
4520 | decode_RD4 TMP1, INS
4523 | add PC, TMP1, TMP2
4524 | stw RC, -4(RA) // Update control var.
4527 |7: // Skip holes in hash part.
4533 | // RA = base*8, RD = target (points to ITERN)
4536 | lwz CFUNC:TMP1, -20(RA)
4539 | cmpwi cr0, TMP2, LJ_TTAB
4540 | cmpwi cr1, TMP0, LJ_TFUNC
4541 | cmpwi cr6, TMP3, LJ_TNIL
4543 | lbz TMP1, CFUNC:TMP1->ffid
4544 | crand 4*cr0+eq, 4*cr0+eq, 4*cr6+eq
4545 | cmpwi cr7, TMP1, FF_next_N
4547 | crand 4*cr0+eq, 4*cr0+eq, 4*cr7+eq
4548 | add TMP3, PC, TMP0
4551 | ori TMP1, TMP1, 0x7fff
4552 | stw ZERO, -4(RA) // Initialize control var.
4554 | addis PC, TMP3, -(BCBIAS_J*4 >> 16)
4557 |5: // Despecialize bytecode if any of the checks fail.
4561 | addis PC, TMP3, -(BCBIAS_J*4 >> 16)
4567 | // RA = base*8, RB = (nresults+1)*8, RC = numparams*8
4568 | lwz TMP0, FRAME_PC(BASE)
4571 | addi RC, RC, FRAME_VARG
4573 | subi TMP3, BASE, 8 // TMP3 = vtop
4574 | sub RC, RC, TMP0 // RC = vbase
4575 | // Note: RC may now be even _above_ BASE if nargs was < numparams.
4578 | sub TMP1, TMP3, RC
4581 | sub. TMP1, TMP3, RC
4583 | beq cr1, >5 // Copy all varargs?
4584 | subi TMP2, TMP2, 16
4585 | ble >2 // No vararg slots?
4586 |1: // Copy vararg slots to destination slots.
4591 | cmplw cr1, RC, TMP3
4592 | bge >3 // All destination slots filled?
4594 | blt cr1, <1 // More vararg slots?
4595 |2: // Fill up remainder with nil.
4603 |5: // Copy all varargs.
4604 | lwz TMP0, L->maxstack
4605 | li MULTRES, 8 // MULTRES = (0+1)*8
4606 | bley <3 // No vararg slots?
4607 | add TMP2, RA, TMP1
4609 | addi MULTRES, TMP1, 8
4617 | blt <6 // More vararg slots?
4620 |7: // Grow stack for varargs.
4623 | sub SAVE0, RC, BASE // Need delta, because BASE may change.
4627 | srwi CARG2, TMP1, 3
4628 | bl extern lj_state_growstack // (lua_State *L, int n)
4631 | add RC, BASE, SAVE0
4632 | subi TMP3, BASE, 8
4636 /* -- Returns ----------------------------------------------------------- */
4639 | // RA = results*8, RD = extra_nresults*8
4640 | add RD, RD, MULTRES // MULTRES >= 8, so RD >= 8.
4641 | // Fall through. Assumes BC_RET follows.
4645 | // RA = results*8, RD = (nresults+1)*8
4646 | lwz PC, FRAME_PC(BASE)
4650 | andix. TMP0, PC, FRAME_TYPE
4651 | xori TMP1, PC, FRAME_VARG
4655 | // BASE = base, RA = resultptr, RD = (nresults+1)*8, PC = return
4658 | subi TMP2, BASE, 8
4660 | decode_RB8 RB, INS
4664 | addi TMP3, TMP1, 8
4667 | stfdx f0, TMP2, TMP1
4669 | addi TMP1, TMP3, 8
4672 | stfdx f1, TMP2, TMP3
4677 | decode_RA8 RA, INS
4679 | sub BASE, TMP2, RA
4680 | lwz LFUNC:TMP1, FRAME_FUNC(BASE)
4682 | lwz TMP1, LFUNC:TMP1->pc
4683 | lwz KBASE, PC2PROTO(k)(TMP1)
4686 |6: // Fill up results with nil.
4689 | stwx TISNIL, TMP2, TMP1
4692 |->BC_RETV_Z: // Non-standard return case.
4693 | andix. TMP2, TMP1, FRAME_TYPEP
4695 | // Return from vararg function: relocate BASE down.
4696 | sub BASE, BASE, TMP1
4697 | lwz PC, FRAME_PC(BASE)
4701 case BC_RET0: case BC_RET1:
4702 | // RA = results*8, RD = (nresults+1)*8
4703 | lwz PC, FRAME_PC(BASE)
4706 | andix. TMP0, PC, FRAME_TYPE
4707 | xori TMP1, PC, FRAME_VARG
4711 | subi TMP2, BASE, 8
4712 | decode_RB8 RB, INS
4713 if (op == BC_RET1) {
4719 | decode_RA8 RA, INS
4721 | sub BASE, TMP2, RA
4722 | lwz LFUNC:TMP1, FRAME_FUNC(BASE)
4724 | lwz TMP1, LFUNC:TMP1->pc
4725 | lwz KBASE, PC2PROTO(k)(TMP1)
4728 |6: // Fill up results with nil.
4731 | stwx TISNIL, TMP2, TMP1
4735 /* -- Loops and branches ------------------------------------------------ */
4741 | // Fall through. Assumes BC_IFORL follows.
4751 | // RA = base*8, RD = target (after end of loop or start of loop)
4752 vk = (op == BC_IFORL || op == BC_JFORL);
4755 | lwzux TMP1, RA, BASE
4756 | lwz CARG1, FORL_IDX*8+4(RA)
4757 | cmplw cr0, TMP1, TISNUM
4759 | lwz CARG3, FORL_STEP*8+4(RA)
4762 | // Need to check overflow for (a<<32) + (b<<32).
4763 | rldicr TMP0, CARG1, 32, 31
4764 | rldicr TMP2, CARG3, 32, 31
4765 | add CARG1, CARG1, CARG3
4766 | addo. TMP0, TMP0, TMP2
4768 | addo. CARG1, CARG1, CARG3
4770 | cmpwi cr6, CARG3, 0
4771 | lwz CARG2, FORL_STOP*8+4(RA)
4774 | stw CARG1, FORL_IDX*8+4(RA)
4776 | lwz TMP3, FORL_STEP*8(RA)
4777 | lwz CARG3, FORL_STEP*8+4(RA)
4778 | lwz TMP2, FORL_STOP*8(RA)
4779 | lwz CARG2, FORL_STOP*8+4(RA)
4780 | cmplw cr7, TMP3, TISNUM
4781 | cmplw cr1, TMP2, TISNUM
4782 | crand 4*cr0+eq, 4*cr0+eq, 4*cr7+eq
4783 | crand 4*cr0+eq, 4*cr0+eq, 4*cr1+eq
4784 | cmpwi cr6, CARG3, 0
4790 | stw TISNUM, FORL_EXT*8(RA)
4791 if (op != BC_JFORL) {
4794 | stw CARG1, FORL_EXT*8+4(RA)
4795 if (op != BC_JFORL) {
4798 if (op == BC_FORI) {
4799 | bgt >3 // See FP loop below.
4800 } else if (op == BC_JFORI) {
4801 | addis PC, RD, -(BCBIAS_J*4 >> 16)
4803 } else if (op == BC_IFORL) {
4805 | addis PC, RD, -(BCBIAS_J*4 >> 16)
4811 |5: // Invert check for negative step.
4815 |6: // Potential overflow.
4816 | checkov TMP0, <4 // Ignore unrelated overflow.
4823 | lfd f1, FORL_IDX*8(RA)
4825 | lfdux f1, RA, BASE
4827 | lfd f3, FORL_STEP*8(RA)
4828 | lfd f2, FORL_STOP*8(RA)
4829 | lwz TMP3, FORL_STEP*8(RA)
4831 | stfd f1, FORL_IDX*8(RA)
4836 | lwzux TMP1, RA, BASE
4837 | lwz TMP3, FORL_STEP*8(RA)
4838 | lwz TMP2, FORL_STOP*8(RA)
4839 | cmplw cr0, TMP1, TISNUM
4840 | cmplw cr7, TMP3, TISNUM
4841 | cmplw cr1, TMP2, TISNUM
4843 | lfd f1, FORL_IDX*8(RA)
4844 | crand 4*cr0+lt, 4*cr0+lt, 4*cr7+lt
4845 | crand 4*cr0+lt, 4*cr0+lt, 4*cr1+lt
4846 | lfd f2, FORL_STOP*8(RA)
4849 | cmpwi cr6, TMP3, 0
4850 if (op != BC_JFORL) {
4853 | stfd f1, FORL_EXT*8(RA)
4854 if (op != BC_JFORL) {
4858 if (op == BC_JFORI) {
4859 | addis PC, RD, -(BCBIAS_J*4 >> 16)
4862 if (op == BC_FORI) {
4864 } else if (op == BC_IFORL) {
4871 | addis PC, RD, -(BCBIAS_J*4 >> 16)
4872 } else if (op == BC_JFORI) {
4883 |5: // Negative step.
4884 if (op == BC_FORI) {
4886 |3: // Used by integer loop, too.
4887 | addis PC, RD, -(BCBIAS_J*4 >> 16)
4888 } else if (op == BC_IFORL) {
4890 } else if (op == BC_JFORI) {
4896 if (op == BC_JFORI) {
4899 | decode_RD8 RD, INS
4908 | // Fall through. Assumes BC_IITERL follows.
4916 | // RA = base*8, RD = target
4917 | lwzux TMP1, RA, BASE
4919 | checknil TMP1; beq >1 // Stop if iterator returned nil.
4920 if (op == BC_JITERL) {
4925 | branch_RD // Otherwise save control var + branch.
4934 | // RA = base*8, RD = target (loop extent)
4935 | // Note: RA/RD is only used by trace recorder to determine scope/extent
4936 | // This opcode does NOT jump, it's only purpose is to detect a hot loop.
4940 | // Fall through. Assumes BC_ILOOP follows.
4944 | // RA = base*8, RD = target (loop extent)
4950 | // RA = base*8 (ignored), RD = traceno*8
4951 | lwz TMP1, DISPATCH_J(trace)(DISPATCH)
4953 | // Traces on PPC don't store the trace number, so use 0.
4954 | stw ZERO, DISPATCH_GL(vmstate)(DISPATCH)
4955 | lwzx TRACE:TMP2, TMP1, RD
4957 | lp TMP2, TRACE:TMP2->mcode
4958 | stw BASE, DISPATCH_GL(jit_base)(DISPATCH)
4960 | addi JGL, DISPATCH, GG_DISP2G+32768
4961 | stw L, DISPATCH_GL(tmpbuf.L)(DISPATCH)
4967 | // RA = base*8 (only used by trace recorder), RD = target
4972 /* -- Function headers -------------------------------------------------- */
4978 case BC_FUNCV: /* NYI: compiled vararg functions. */
4979 | // Fall through. Assumes BC_IFUNCF/BC_IFUNCV follow.
4987 | // BASE = new base, RA = BASE+framesize*8, RB = LFUNC, RC = nargs*8
4988 | lwz TMP2, L->maxstack
4989 | lbz TMP1, -4+PC2PROTO(numparams)(PC)
4990 | lwz KBASE, -4+PC2PROTO(k)(PC)
4992 | slwi TMP1, TMP1, 3
4993 | bgt ->vm_growstack_l
4994 if (op != BC_JFUNCF) {
4998 | cmplw NARGS8:RC, TMP1 // Check for missing parameters.
5000 if (op == BC_JFUNCF) {
5001 | decode_RD8 RD, INS
5007 |3: // Clear missing parameters.
5008 | stwx TISNIL, BASE, NARGS8:RC
5009 | addi NARGS8:RC, NARGS8:RC, 8
5017 | NYI // NYI: compiled vararg functions
5018 break; /* NYI: compiled vararg functions. */
5021 | // BASE = new base, RA = BASE+framesize*8, RB = LFUNC, RC = nargs*8
5022 | lwz TMP2, L->maxstack
5023 | add TMP1, BASE, RC
5025 | stw LFUNC:RB, 4(TMP1) // Store copy of LFUNC.
5026 | addi TMP3, RC, 8+FRAME_VARG
5027 | lwz KBASE, -4+PC2PROTO(k)(PC)
5029 | stw TMP3, 0(TMP1) // Store delta + FRAME_VARG.
5030 | bge ->vm_growstack_l
5031 | lbz TMP2, -4+PC2PROTO(numparams)(PC)
5036 | addi BASE, TMP1, 8
5039 | cmplw RA, RC // Less args than parameters?
5043 | stw TISNIL, 0(RA) // Clear old fixarg slot (help the GC).
5046 | addic. TMP2, TMP2, -1
5048 | stw TMP3, 12(TMP1)
5049 | addi TMP1, TMP1, 8
5054 |4: // Clear missing parameters.
5061 | // BASE = new base, RA = BASE+framesize*8, RB = CFUNC, RC = nargs*8
5062 if (op == BC_FUNCC) {
5063 | lp RD, CFUNC:RB->f
5065 | lp RD, DISPATCH_GL(wrapf)(DISPATCH)
5067 | add TMP1, RA, NARGS8:RC
5068 | lwz TMP2, L->maxstack
5069 | .toc lp TMP3, 0(RD)
5070 | add RC, BASE, NARGS8:RC
5080 if (op == BC_FUNCCW) {
5081 | lp CARG2, CFUNC:RB->f
5084 | bgt ->vm_growstack_c // Need to grow stack.
5085 | .toc lp TOCREG, TOC_OFS(RD)
5086 | .tocenv lp ENVREG, ENV_OFS(RD)
5088 | bctrl // (lua_State *L [, lua_CFunction f])
5089 | // Returns nresults.
5091 | .toc ld TOCREG, SAVE_TOC
5095 | lwz PC, FRAME_PC(BASE) // Fetch PC of caller.
5096 | stw L, DISPATCH_GL(cur_L)(DISPATCH)
5097 | sub RA, TMP1, RD // RA = L->top - nresults*8
5102 /* ---------------------------------------------------------------------- */
5105 fprintf(stderr, "Error: undefined opcode BC_%s\n", bc_names[op]);
5111 static int build_backend(BuildCtx *ctx)
5115 dasm_growpc(Dst, BC__MAX);
5117 build_subroutines(ctx);
5120 for (op = 0; op < BC__MAX; op++)
5121 build_ins(ctx, (BCOp)op, op);
5126 /* Emit pseudo frame-info for all assembler functions. */
5127 static void emit_asm_debug(BuildCtx *ctx)
5129 int fcofs = (int)((uint8_t *)ctx->glob[GLOB_vm_ffi_call] - ctx->code);
5131 switch (ctx->mode) {
5133 fprintf(ctx->fp, "\t.section .debug_frame,\"\",@progbits\n");
5136 "\t.long .LECIE0-.LSCIE0\n"
5138 "\t.long 0xffffffff\n"
5144 "\t.byte 0xc\n\t.uleb128 1\n\t.uleb128 0\n"
5149 "\t.long .LEFDE0-.LASFDE0\n"
5151 "\t.long .Lframe0\n"
5154 "\t.byte 0xe\n\t.uleb128 %d\n"
5155 "\t.byte 0x11\n\t.uleb128 65\n\t.sleb128 -1\n"
5156 "\t.byte 0x5\n\t.uleb128 70\n\t.uleb128 55\n",
5157 fcofs, CFRAME_SIZE);
5158 for (i = 14; i <= 31; i++)
5160 "\t.byte %d\n\t.uleb128 %d\n"
5161 "\t.byte %d\n\t.uleb128 %d\n",
5162 0x80+i, 37+(31-i), 0x80+32+i, 2+2*(31-i));
5169 "\t.long .LEFDE1-.LASFDE1\n"
5171 "\t.long .Lframe0\n"
5173 "\t.long .lj_vm_ffi_call\n"
5175 "\t.long lj_vm_ffi_call\n"
5178 "\t.byte 0x11\n\t.uleb128 65\n\t.sleb128 -1\n"
5179 "\t.byte 0x8e\n\t.uleb128 2\n"
5180 "\t.byte 0xd\n\t.uleb128 0xe\n"
5182 ".LEFDE1:\n\n", (int)ctx->codesz - fcofs);
5185 fprintf(ctx->fp, "\t.section .eh_frame,\"a\",@progbits\n");
5188 "\t.long .LECIE1-.LSCIE1\n"
5192 "\t.string \"zPR\"\n"
5196 "\t.uleb128 6\n" /* augmentation length */
5197 "\t.byte 0x1b\n" /* pcrel|sdata4 */
5198 "\t.long lj_err_unwind_dwarf-.\n"
5199 "\t.byte 0x1b\n" /* pcrel|sdata4 */
5200 "\t.byte 0xc\n\t.uleb128 1\n\t.uleb128 0\n"
5205 "\t.long .LEFDE2-.LASFDE2\n"
5207 "\t.long .LASFDE2-.Lframe1\n"
5208 "\t.long .Lbegin-.\n"
5210 "\t.uleb128 0\n" /* augmentation length */
5211 "\t.byte 0xe\n\t.uleb128 %d\n"
5212 "\t.byte 0x11\n\t.uleb128 65\n\t.sleb128 -1\n"
5213 "\t.byte 0x5\n\t.uleb128 70\n\t.uleb128 55\n",
5214 fcofs, CFRAME_SIZE);
5215 for (i = 14; i <= 31; i++)
5217 "\t.byte %d\n\t.uleb128 %d\n"
5218 "\t.byte %d\n\t.uleb128 %d\n",
5219 0x80+i, 37+(31-i), 0x80+32+i, 2+2*(31-i));
5226 "\t.long .LECIE2-.LSCIE2\n"
5230 "\t.string \"zR\"\n"
5234 "\t.uleb128 1\n" /* augmentation length */
5235 "\t.byte 0x1b\n" /* pcrel|sdata4 */
5236 "\t.byte 0xc\n\t.uleb128 1\n\t.uleb128 0\n"
5241 "\t.long .LEFDE3-.LASFDE3\n"
5243 "\t.long .LASFDE3-.Lframe2\n"
5244 "\t.long lj_vm_ffi_call-.\n"
5246 "\t.uleb128 0\n" /* augmentation length */
5247 "\t.byte 0x11\n\t.uleb128 65\n\t.sleb128 -1\n"
5248 "\t.byte 0x8e\n\t.uleb128 2\n"
5249 "\t.byte 0xd\n\t.uleb128 0xe\n"
5251 ".LEFDE3:\n\n", (int)ctx->codesz - fcofs);