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Diffstat (limited to 'Build/source/libs/luajit/LuaJIT-2.1.0-beta1/src/vm_ppc.dasc')
| -rw-r--r-- | Build/source/libs/luajit/LuaJIT-2.1.0-beta1/src/vm_ppc.dasc | 5252 |
1 files changed, 5252 insertions, 0 deletions
diff --git a/Build/source/libs/luajit/LuaJIT-2.1.0-beta1/src/vm_ppc.dasc b/Build/source/libs/luajit/LuaJIT-2.1.0-beta1/src/vm_ppc.dasc new file mode 100644 index 00000000000..9299c554e2b --- /dev/null +++ b/Build/source/libs/luajit/LuaJIT-2.1.0-beta1/src/vm_ppc.dasc @@ -0,0 +1,5252 @@ +|// Low-level VM code for PowerPC 32 bit or 32on64 bit mode. +|// Bytecode interpreter, fast functions and helper functions. +|// Copyright (C) 2005-2015 Mike Pall. See Copyright Notice in luajit.h +| +|.arch ppc +|.section code_op, code_sub +| +|.actionlist build_actionlist +|.globals GLOB_ +|.globalnames globnames +|.externnames extnames +| +|// Note: The ragged indentation of the instructions is intentional. +|// The starting columns indicate data dependencies. +| +|//----------------------------------------------------------------------- +| +|// DynASM defines used by the PPC port: +|// +|// P64 64 bit pointers (only for GPR64 testing). +|// Note: see vm_ppc64.dasc for a full PPC64 _LP64 port. +|// GPR64 64 bit registers (but possibly 32 bit pointers, e.g. PS3). +|// Affects reg saves, stack layout, carry/overflow/dot flags etc. +|// FRAME32 Use 32 bit frame layout, even with GPR64 (Xbox 360). +|// TOC Need table of contents (64 bit or 32 bit variant, e.g. PS3). +|// Function pointers are really a struct: code, TOC, env (optional). +|// TOCENV Function pointers have an environment pointer, too (not on PS3). +|// PPE Power Processor Element of Cell (PS3) or Xenon (Xbox 360). +|// Must avoid (slow) micro-coded instructions. +| +|.if P64 +|.define TOC, 1 +|.define TOCENV, 1 +|.macro lpx, a, b, c; ldx a, b, c; .endmacro +|.macro lp, a, b; ld a, b; .endmacro +|.macro stp, a, b; std a, b; .endmacro +|.define decode_OPP, decode_OP8 +|.if FFI +|// Missing: Calling conventions, 64 bit regs, TOC. +|.error lib_ffi not yet implemented for PPC64 +|.endif +|.else +|.macro lpx, a, b, c; lwzx a, b, c; .endmacro +|.macro lp, a, b; lwz a, b; .endmacro +|.macro stp, a, b; stw a, b; .endmacro +|.define decode_OPP, decode_OP4 +|.endif +| +|// Convenience macros for TOC handling. +|.if TOC +|// Linker needs a TOC patch area for every external call relocation. +|.macro blex, target; bl extern target@plt; nop; .endmacro +|.macro .toc, a, b; a, b; .endmacro +|.if P64 +|.define TOC_OFS, 8 +|.define ENV_OFS, 16 +|.else +|.define TOC_OFS, 4 +|.define ENV_OFS, 8 +|.endif +|.else // No TOC. +|.macro blex, target; bl extern target@plt; .endmacro +|.macro .toc, a, b; .endmacro +|.endif +|.macro .tocenv, a, b; .if TOCENV; a, b; .endif; .endmacro +| +|.macro .gpr64, a, b; .if GPR64; a, b; .endif; .endmacro +| +|.macro andix., y, a, i +|.if PPE +| rlwinm y, a, 0, 31-lj_fls(i), 31-lj_ffs(i) +| cmpwi y, 0 +|.else +| andi. y, a, i +|.endif +|.endmacro +| +|.macro clrso, reg +|.if PPE +| li reg, 0 +| mtxer reg +|.else +| mcrxr cr0 +|.endif +|.endmacro +| +|.macro checkov, reg, noov +|.if PPE +| mfxer reg +| add reg, reg, reg +| cmpwi reg, 0 +| li reg, 0 +| mtxer reg +| bgey noov +|.else +| mcrxr cr0 +| bley noov +|.endif +|.endmacro +| +|//----------------------------------------------------------------------- +| +|// Fixed register assignments for the interpreter. +|// Don't use: r1 = sp, r2 and r13 = reserved (TOC, TLS or SDATA) +| +|// The following must be C callee-save (but BASE is often refetched). +|.define BASE, r14 // Base of current Lua stack frame. +|.define KBASE, r15 // Constants of current Lua function. +|.define PC, r16 // Next PC. +|.define DISPATCH, r17 // Opcode dispatch table. +|.define LREG, r18 // Register holding lua_State (also in SAVE_L). +|.define MULTRES, r19 // Size of multi-result: (nresults+1)*8. +|.define JGL, r31 // On-trace: global_State + 32768. +| +|// Constants for type-comparisons, stores and conversions. C callee-save. +|.define TISNUM, r22 +|.define TISNIL, r23 +|.define ZERO, r24 +|.define TOBIT, f30 // 2^52 + 2^51. +|.define TONUM, f31 // 2^52 + 2^51 + 2^31. +| +|// The following temporaries are not saved across C calls, except for RA. +|.define RA, r20 // Callee-save. +|.define RB, r10 +|.define RC, r11 +|.define RD, r12 +|.define INS, r7 // Overlaps CARG5. +| +|.define TMP0, r0 +|.define TMP1, r8 +|.define TMP2, r9 +|.define TMP3, r6 // Overlaps CARG4. +| +|// Saved temporaries. +|.define SAVE0, r21 +| +|// Calling conventions. +|.define CARG1, r3 +|.define CARG2, r4 +|.define CARG3, r5 +|.define CARG4, r6 // Overlaps TMP3. +|.define CARG5, r7 // Overlaps INS. +| +|.define FARG1, f1 +|.define FARG2, f2 +| +|.define CRET1, r3 +|.define CRET2, r4 +| +|.define TOCREG, r2 // TOC register (only used by C code). +|.define ENVREG, r11 // Environment pointer (nested C functions). +| +|// Stack layout while in interpreter. Must match with lj_frame.h. +|.if GPR64 +|.if FRAME32 +| +|// 456(sp) // \ 32/64 bit C frame info +|.define TONUM_LO, 452(sp) // | +|.define TONUM_HI, 448(sp) // | +|.define TMPD_LO, 444(sp) // | +|.define TMPD_HI, 440(sp) // | +|.define SAVE_CR, 432(sp) // | 64 bit CR save. +|.define SAVE_ERRF, 424(sp) // > Parameter save area. +|.define SAVE_NRES, 420(sp) // | +|.define SAVE_L, 416(sp) // | +|.define SAVE_PC, 412(sp) // | +|.define SAVE_MULTRES, 408(sp) // | +|.define SAVE_CFRAME, 400(sp) // / 64 bit C frame chain. +|// 392(sp) // Reserved. +|.define CFRAME_SPACE, 384 // Delta for sp. +|// Back chain for sp: 384(sp) <-- sp entering interpreter +|.define SAVE_LR, 376(sp) // 32 bit LR stored in hi-part. +|.define SAVE_GPR_, 232 // .. 232+18*8: 64 bit GPR saves. +|.define SAVE_FPR_, 88 // .. 88+18*8: 64 bit FPR saves. +|// 80(sp) // Needed for 16 byte stack frame alignment. +|// 16(sp) // Callee parameter save area (ABI mandated). +|// 8(sp) // Reserved +|// Back chain for sp: 0(sp) <-- sp while in interpreter +|// 32 bit sp stored in hi-part of 0(sp). +| +|.define TMPD_BLO, 447(sp) +|.define TMPD, TMPD_HI +|.define TONUM_D, TONUM_HI +| +|.else +| +|// 508(sp) // \ 32 bit C frame info. +|.define SAVE_ERRF, 472(sp) // | +|.define SAVE_NRES, 468(sp) // | +|.define SAVE_L, 464(sp) // > Parameter save area. +|.define SAVE_PC, 460(sp) // | +|.define SAVE_MULTRES, 456(sp) // | +|.define SAVE_CFRAME, 448(sp) // / 64 bit C frame chain. +|.define SAVE_LR, 416(sp) +|.define CFRAME_SPACE, 400 // Delta for sp. +|// Back chain for sp: 400(sp) <-- sp entering interpreter +|.define SAVE_FPR_, 256 // .. 256+18*8: 64 bit FPR saves. +|.define SAVE_GPR_, 112 // .. 112+18*8: 64 bit GPR saves. +|// 48(sp) // Callee parameter save area (ABI mandated). +|.define SAVE_TOC, 40(sp) // TOC save area. +|.define TMPD_LO, 36(sp) // \ Link editor temp (ABI mandated). +|.define TMPD_HI, 32(sp) // / +|.define TONUM_LO, 28(sp) // \ Compiler temp (ABI mandated). +|.define TONUM_HI, 24(sp) // / +|// Next frame lr: 16(sp) +|.define SAVE_CR, 8(sp) // 64 bit CR save. +|// Back chain for sp: 0(sp) <-- sp while in interpreter +| +|.define TMPD_BLO, 39(sp) +|.define TMPD, TMPD_HI +|.define TONUM_D, TONUM_HI +| +|.endif +|.else +| +|.define SAVE_LR, 276(sp) +|.define CFRAME_SPACE, 272 // Delta for sp. +|// Back chain for sp: 272(sp) <-- sp entering interpreter +|.define SAVE_FPR_, 128 // .. 128+18*8: 64 bit FPR saves. +|.define SAVE_GPR_, 56 // .. 56+18*4: 32 bit GPR saves. +|.define SAVE_CR, 52(sp) // 32 bit CR save. +|.define SAVE_ERRF, 48(sp) // 32 bit C frame info. +|.define SAVE_NRES, 44(sp) +|.define SAVE_CFRAME, 40(sp) +|.define SAVE_L, 36(sp) +|.define SAVE_PC, 32(sp) +|.define SAVE_MULTRES, 28(sp) +|.define UNUSED1, 24(sp) +|.define TMPD_LO, 20(sp) +|.define TMPD_HI, 16(sp) +|.define TONUM_LO, 12(sp) +|.define TONUM_HI, 8(sp) +|// Next frame lr: 4(sp) +|// Back chain for sp: 0(sp) <-- sp while in interpreter +| +|.define TMPD_BLO, 23(sp) +|.define TMPD, TMPD_HI +|.define TONUM_D, TONUM_HI +| +|.endif +| +|.macro save_, reg +|.if GPR64 +| std r..reg, SAVE_GPR_+(reg-14)*8(sp) +|.else +| stw r..reg, SAVE_GPR_+(reg-14)*4(sp) +|.endif +| stfd f..reg, SAVE_FPR_+(reg-14)*8(sp) +|.endmacro +|.macro rest_, reg +|.if GPR64 +| ld r..reg, SAVE_GPR_+(reg-14)*8(sp) +|.else +| lwz r..reg, SAVE_GPR_+(reg-14)*4(sp) +|.endif +| lfd f..reg, SAVE_FPR_+(reg-14)*8(sp) +|.endmacro +| +|.macro saveregs +|.if GPR64 and not FRAME32 +| stdu sp, -CFRAME_SPACE(sp) +|.else +| stwu sp, -CFRAME_SPACE(sp) +|.endif +| save_ 14; save_ 15; save_ 16 +| mflr r0 +| save_ 17; save_ 18; save_ 19; save_ 20; save_ 21; save_ 22 +|.if GPR64 and not FRAME32 +| std r0, SAVE_LR +|.else +| stw r0, SAVE_LR +|.endif +| save_ 23; save_ 24; save_ 25 +| mfcr r0 +| save_ 26; save_ 27; save_ 28; save_ 29; save_ 30; save_ 31 +|.if GPR64 +| std r0, SAVE_CR +|.else +| stw r0, SAVE_CR +|.endif +| .toc std TOCREG, SAVE_TOC +|.endmacro +| +|.macro restoreregs +|.if GPR64 and not FRAME32 +| ld r0, SAVE_LR +|.else +| lwz r0, SAVE_LR +|.endif +|.if GPR64 +| ld r12, SAVE_CR +|.else +| lwz r12, SAVE_CR +|.endif +| rest_ 14; rest_ 15; rest_ 16; rest_ 17; rest_ 18; rest_ 19 +| mtlr r0; +|.if PPE; mtocrf 0x20, r12; .else; mtcrf 0x38, r12; .endif +| rest_ 20; rest_ 21; rest_ 22; rest_ 23; rest_ 24; rest_ 25 +|.if PPE; mtocrf 0x10, r12; .endif +| rest_ 26; rest_ 27; rest_ 28; rest_ 29; rest_ 30; rest_ 31 +|.if PPE; mtocrf 0x08, r12; .endif +| addi sp, sp, CFRAME_SPACE +|.endmacro +| +|// Type definitions. Some of these are only used for documentation. +|.type L, lua_State, LREG +|.type GL, global_State +|.type TVALUE, TValue +|.type GCOBJ, GCobj +|.type STR, GCstr +|.type TAB, GCtab +|.type LFUNC, GCfuncL +|.type CFUNC, GCfuncC +|.type PROTO, GCproto +|.type UPVAL, GCupval +|.type NODE, Node +|.type NARGS8, int +|.type TRACE, GCtrace +|.type SBUF, SBuf +| +|//----------------------------------------------------------------------- +| +|// Trap for not-yet-implemented parts. +|.macro NYI; tw 4, sp, sp; .endmacro +| +|// int/FP conversions. +|.macro tonum_i, freg, reg +| xoris reg, reg, 0x8000 +| stw reg, TONUM_LO +| lfd freg, TONUM_D +| fsub freg, freg, TONUM +|.endmacro +| +|.macro tonum_u, freg, reg +| stw reg, TONUM_LO +| lfd freg, TONUM_D +| fsub freg, freg, TOBIT +|.endmacro +| +|.macro toint, reg, freg, tmpfreg +| fctiwz tmpfreg, freg +| stfd tmpfreg, TMPD +| lwz reg, TMPD_LO +|.endmacro +| +|.macro toint, reg, freg +| toint reg, freg, freg +|.endmacro +| +|//----------------------------------------------------------------------- +| +|// Access to frame relative to BASE. +|.define FRAME_PC, -8 +|.define FRAME_FUNC, -4 +| +|// Instruction decode. +|.macro decode_OP4, dst, ins; rlwinm dst, ins, 2, 22, 29; .endmacro +|.macro decode_OP8, dst, ins; rlwinm dst, ins, 3, 21, 28; .endmacro +|.macro decode_RA8, dst, ins; rlwinm dst, ins, 27, 21, 28; .endmacro +|.macro decode_RB8, dst, ins; rlwinm dst, ins, 11, 21, 28; .endmacro +|.macro decode_RC8, dst, ins; rlwinm dst, ins, 19, 21, 28; .endmacro +|.macro decode_RD8, dst, ins; rlwinm dst, ins, 19, 13, 28; .endmacro +| +|.macro decode_OP1, dst, ins; rlwinm dst, ins, 0, 24, 31; .endmacro +|.macro decode_RD4, dst, ins; rlwinm dst, ins, 18, 14, 29; .endmacro +| +|// Instruction fetch. +|.macro ins_NEXT1 +| lwz INS, 0(PC) +| addi PC, PC, 4 +|.endmacro +|// Instruction decode+dispatch. Note: optimized for e300! +|.macro ins_NEXT2 +| decode_OPP TMP1, INS +| lpx TMP0, DISPATCH, TMP1 +| mtctr TMP0 +| decode_RB8 RB, INS +| decode_RD8 RD, INS +| decode_RA8 RA, INS +| decode_RC8 RC, INS +| bctr +|.endmacro +|.macro ins_NEXT +| ins_NEXT1 +| ins_NEXT2 +|.endmacro +| +|// Instruction footer. +|.if 1 +| // Replicated dispatch. Less unpredictable branches, but higher I-Cache use. +| .define ins_next, ins_NEXT +| .define ins_next_, ins_NEXT +| .define ins_next1, ins_NEXT1 +| .define ins_next2, ins_NEXT2 +|.else +| // Common dispatch. Lower I-Cache use, only one (very) unpredictable branch. +| // Affects only certain kinds of benchmarks (and only with -j off). +| .macro ins_next +| b ->ins_next +| .endmacro +| .macro ins_next1 +| .endmacro +| .macro ins_next2 +| b ->ins_next +| .endmacro +| .macro ins_next_ +| ->ins_next: +| ins_NEXT +| .endmacro +|.endif +| +|// Call decode and dispatch. +|.macro ins_callt +| // BASE = new base, RB = LFUNC/CFUNC, RC = nargs*8, FRAME_PC(BASE) = PC +| lwz PC, LFUNC:RB->pc +| lwz INS, 0(PC) +| addi PC, PC, 4 +| decode_OPP TMP1, INS +| decode_RA8 RA, INS +| lpx TMP0, DISPATCH, TMP1 +| add RA, RA, BASE +| mtctr TMP0 +| bctr +|.endmacro +| +|.macro ins_call +| // BASE = new base, RB = LFUNC/CFUNC, RC = nargs*8, PC = caller PC +| stw PC, FRAME_PC(BASE) +| ins_callt +|.endmacro +| +|//----------------------------------------------------------------------- +| +|// Macros to test operand types. +|.macro checknum, reg; cmplw reg, TISNUM; .endmacro +|.macro checknum, cr, reg; cmplw cr, reg, TISNUM; .endmacro +|.macro checkstr, reg; cmpwi reg, LJ_TSTR; .endmacro +|.macro checktab, reg; cmpwi reg, LJ_TTAB; .endmacro +|.macro checkfunc, reg; cmpwi reg, LJ_TFUNC; .endmacro +|.macro checknil, reg; cmpwi reg, LJ_TNIL; .endmacro +| +|.macro branch_RD +| srwi TMP0, RD, 1 +| addis PC, PC, -(BCBIAS_J*4 >> 16) +| add PC, PC, TMP0 +|.endmacro +| +|// Assumes DISPATCH is relative to GL. +#define DISPATCH_GL(field) (GG_DISP2G + (int)offsetof(global_State, field)) +#define DISPATCH_J(field) (GG_DISP2J + (int)offsetof(jit_State, field)) +| +#define PC2PROTO(field) ((int)offsetof(GCproto, field)-(int)sizeof(GCproto)) +| +|.macro hotcheck, delta, target +| rlwinm TMP1, PC, 31, 25, 30 +| addi TMP1, TMP1, GG_DISP2HOT +| lhzx TMP2, DISPATCH, TMP1 +| addic. TMP2, TMP2, -delta +| sthx TMP2, DISPATCH, TMP1 +| blt target +|.endmacro +| +|.macro hotloop +| hotcheck HOTCOUNT_LOOP, ->vm_hotloop +|.endmacro +| +|.macro hotcall +| hotcheck HOTCOUNT_CALL, ->vm_hotcall +|.endmacro +| +|// Set current VM state. Uses TMP0. +|.macro li_vmstate, st; li TMP0, ~LJ_VMST_..st; .endmacro +|.macro st_vmstate; stw TMP0, DISPATCH_GL(vmstate)(DISPATCH); .endmacro +| +|// Move table write barrier back. Overwrites mark and tmp. +|.macro barrierback, tab, mark, tmp +| lwz tmp, DISPATCH_GL(gc.grayagain)(DISPATCH) +| // Assumes LJ_GC_BLACK is 0x04. +| rlwinm mark, mark, 0, 30, 28 // black2gray(tab) +| stw tab, DISPATCH_GL(gc.grayagain)(DISPATCH) +| stb mark, tab->marked +| stw tmp, tab->gclist +|.endmacro +| +|//----------------------------------------------------------------------- + +/* Generate subroutines used by opcodes and other parts of the VM. */ +/* The .code_sub section should be last to help static branch prediction. */ +static void build_subroutines(BuildCtx *ctx) +{ + |.code_sub + | + |//----------------------------------------------------------------------- + |//-- Return handling ---------------------------------------------------- + |//----------------------------------------------------------------------- + | + |->vm_returnp: + | // See vm_return. Also: TMP2 = previous base. + | andix. TMP0, PC, FRAME_P + | li TMP1, LJ_TTRUE + | beq ->cont_dispatch + | + | // Return from pcall or xpcall fast func. + | lwz PC, FRAME_PC(TMP2) // Fetch PC of previous frame. + | mr BASE, TMP2 // Restore caller base. + | // Prepending may overwrite the pcall frame, so do it at the end. + | stwu TMP1, FRAME_PC(RA) // Prepend true to results. + | + |->vm_returnc: + | addi RD, RD, 8 // RD = (nresults+1)*8. + | andix. TMP0, PC, FRAME_TYPE + | cmpwi cr1, RD, 0 + | li CRET1, LUA_YIELD + | beq cr1, ->vm_unwind_c_eh + | mr MULTRES, RD + | beq ->BC_RET_Z // Handle regular return to Lua. + | + |->vm_return: + | // BASE = base, RA = resultptr, RD/MULTRES = (nresults+1)*8, PC = return + | // TMP0 = PC & FRAME_TYPE + | cmpwi TMP0, FRAME_C + | rlwinm TMP2, PC, 0, 0, 28 + | li_vmstate C + | sub TMP2, BASE, TMP2 // TMP2 = previous base. + | bney ->vm_returnp + | + | addic. TMP1, RD, -8 + | stp TMP2, L->base + | lwz TMP2, SAVE_NRES + | subi BASE, BASE, 8 + | st_vmstate + | slwi TMP2, TMP2, 3 + | beq >2 + |1: + | addic. TMP1, TMP1, -8 + | lfd f0, 0(RA) + | addi RA, RA, 8 + | stfd f0, 0(BASE) + | addi BASE, BASE, 8 + | bney <1 + | + |2: + | cmpw TMP2, RD // More/less results wanted? + | bne >6 + |3: + | stp BASE, L->top // Store new top. + | + |->vm_leave_cp: + | lp TMP0, SAVE_CFRAME // Restore previous C frame. + | li CRET1, 0 // Ok return status for vm_pcall. + | stp TMP0, L->cframe + | + |->vm_leave_unw: + | restoreregs + | blr + | + |6: + | ble >7 // Less results wanted? + | // More results wanted. Check stack size and fill up results with nil. + | lwz TMP1, L->maxstack + | cmplw BASE, TMP1 + | bge >8 + | stw TISNIL, 0(BASE) + | addi RD, RD, 8 + | addi BASE, BASE, 8 + | b <2 + | + |7: // Less results wanted. + | subfic TMP3, TMP2, 0 // LUA_MULTRET+1 case? + | sub TMP0, RD, TMP2 + | subfe TMP1, TMP1, TMP1 // TMP1 = TMP2 == 0 ? 0 : -1 + | and TMP0, TMP0, TMP1 + | sub BASE, BASE, TMP0 // Either keep top or shrink it. + | b <3 + | + |8: // Corner case: need to grow stack for filling up results. + | // This can happen if: + | // - A C function grows the stack (a lot). + | // - The GC shrinks the stack in between. + | // - A return back from a lua_call() with (high) nresults adjustment. + | stp BASE, L->top // Save current top held in BASE (yes). + | mr SAVE0, RD + | srwi CARG2, TMP2, 3 + | mr CARG1, L + | bl extern lj_state_growstack // (lua_State *L, int n) + | lwz TMP2, SAVE_NRES + | mr RD, SAVE0 + | slwi TMP2, TMP2, 3 + | lp BASE, L->top // Need the (realloced) L->top in BASE. + | b <2 + | + |->vm_unwind_c: // Unwind C stack, return from vm_pcall. + | // (void *cframe, int errcode) + | mr sp, CARG1 + | mr CRET1, CARG2 + |->vm_unwind_c_eh: // Landing pad for external unwinder. + | lwz L, SAVE_L + | .toc ld TOCREG, SAVE_TOC + | li TMP0, ~LJ_VMST_C + | lwz GL:TMP1, L->glref + | stw TMP0, GL:TMP1->vmstate + | b ->vm_leave_unw + | + |->vm_unwind_ff: // Unwind C stack, return from ff pcall. + | // (void *cframe) + |.if GPR64 + | rldicr sp, CARG1, 0, 61 + |.else + | rlwinm sp, CARG1, 0, 0, 29 + |.endif + |->vm_unwind_ff_eh: // Landing pad for external unwinder. + | lwz L, SAVE_L + | .toc ld TOCREG, SAVE_TOC + | li TISNUM, LJ_TISNUM // Setup type comparison constants. + | lp BASE, L->base + | lus TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float). + | lwz DISPATCH, L->glref // Setup pointer to dispatch table. + | li ZERO, 0 + | stw TMP3, TMPD + | li TMP1, LJ_TFALSE + | ori TMP3, TMP3, 0x0004 // TONUM = 2^52 + 2^51 + 2^31 (float). + | li TISNIL, LJ_TNIL + | li_vmstate INTERP + | lfs TOBIT, TMPD + | lwz PC, FRAME_PC(BASE) // Fetch PC of previous frame. + | la RA, -8(BASE) // Results start at BASE-8. + | stw TMP3, TMPD + | addi DISPATCH, DISPATCH, GG_G2DISP + | stw TMP1, 0(RA) // Prepend false to error message. + | li RD, 16 // 2 results: false + error message. + | st_vmstate + | lfs TONUM, TMPD + | b ->vm_returnc + | + |//----------------------------------------------------------------------- + |//-- Grow stack for calls ----------------------------------------------- + |//----------------------------------------------------------------------- + | + |->vm_growstack_c: // Grow stack for C function. + | li CARG2, LUA_MINSTACK + | b >2 + | + |->vm_growstack_l: // Grow stack for Lua function. + | // BASE = new base, RA = BASE+framesize*8, RC = nargs*8, PC = first PC + | add RC, BASE, RC + | sub RA, RA, BASE + | stp BASE, L->base + | addi PC, PC, 4 // Must point after first instruction. + | stp RC, L->top + | srwi CARG2, RA, 3 + |2: + | // L->base = new base, L->top = top + | stw PC, SAVE_PC + | mr CARG1, L + | bl extern lj_state_growstack // (lua_State *L, int n) + | lp BASE, L->base + | lp RC, L->top + | lwz LFUNC:RB, FRAME_FUNC(BASE) + | sub RC, RC, BASE + | // BASE = new base, RB = LFUNC/CFUNC, RC = nargs*8, FRAME_PC(BASE) = PC + | ins_callt // Just retry the call. + | + |//----------------------------------------------------------------------- + |//-- Entry points into the assembler VM --------------------------------- + |//----------------------------------------------------------------------- + | + |->vm_resume: // Setup C frame and resume thread. + | // (lua_State *L, TValue *base, int nres1 = 0, ptrdiff_t ef = 0) + | saveregs + | mr L, CARG1 + | lwz DISPATCH, L->glref // Setup pointer to dispatch table. + | mr BASE, CARG2 + | lbz TMP1, L->status + | stw L, SAVE_L + | li PC, FRAME_CP + | addi TMP0, sp, CFRAME_RESUME + | addi DISPATCH, DISPATCH, GG_G2DISP + | stw CARG3, SAVE_NRES + | cmplwi TMP1, 0 + | stw CARG3, SAVE_ERRF + | stp CARG3, SAVE_CFRAME + | stw CARG1, SAVE_PC // Any value outside of bytecode is ok. + | stp TMP0, L->cframe + | beq >3 + | + | // Resume after yield (like a return). + | stw L, DISPATCH_GL(cur_L)(DISPATCH) + | mr RA, BASE + | lp BASE, L->base + | li TISNUM, LJ_TISNUM // Setup type comparison constants. + | lp TMP1, L->top + | lwz PC, FRAME_PC(BASE) + | lus TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float). + | stb CARG3, L->status + | stw TMP3, TMPD + | ori TMP3, TMP3, 0x0004 // TONUM = 2^52 + 2^51 + 2^31 (float). + | lfs TOBIT, TMPD + | sub RD, TMP1, BASE + | stw TMP3, TMPD + | lus TMP0, 0x4338 // Hiword of 2^52 + 2^51 (double) + | addi RD, RD, 8 + | stw TMP0, TONUM_HI + | li_vmstate INTERP + | li ZERO, 0 + | st_vmstate + | andix. TMP0, PC, FRAME_TYPE + | mr MULTRES, RD + | lfs TONUM, TMPD + | li TISNIL, LJ_TNIL + | beq ->BC_RET_Z + | b ->vm_return + | + |->vm_pcall: // Setup protected C frame and enter VM. + | // (lua_State *L, TValue *base, int nres1, ptrdiff_t ef) + | saveregs + | li PC, FRAME_CP + | stw CARG4, SAVE_ERRF + | b >1 + | + |->vm_call: // Setup C frame and enter VM. + | // (lua_State *L, TValue *base, int nres1) + | saveregs + | li PC, FRAME_C + | + |1: // Entry point for vm_pcall above (PC = ftype). + | lp TMP1, L:CARG1->cframe + | mr L, CARG1 + | stw CARG3, SAVE_NRES + | lwz DISPATCH, L->glref // Setup pointer to dispatch table. + | stw CARG1, SAVE_L + | mr BASE, CARG2 + | addi DISPATCH, DISPATCH, GG_G2DISP + | stw CARG1, SAVE_PC // Any value outside of bytecode is ok. + | stp TMP1, SAVE_CFRAME + | stp sp, L->cframe // Add our C frame to cframe chain. + | + |3: // Entry point for vm_cpcall/vm_resume (BASE = base, PC = ftype). + | stw L, DISPATCH_GL(cur_L)(DISPATCH) + | lp TMP2, L->base // TMP2 = old base (used in vmeta_call). + | li TISNUM, LJ_TISNUM // Setup type comparison constants. + | lp TMP1, L->top + | lus TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float). + | add PC, PC, BASE + | stw TMP3, TMPD + | li ZERO, 0 + | ori TMP3, TMP3, 0x0004 // TONUM = 2^52 + 2^51 + 2^31 (float). + | lfs TOBIT, TMPD + | sub PC, PC, TMP2 // PC = frame delta + frame type + | stw TMP3, TMPD + | lus TMP0, 0x4338 // Hiword of 2^52 + 2^51 (double) + | sub NARGS8:RC, TMP1, BASE + | stw TMP0, TONUM_HI + | li_vmstate INTERP + | lfs TONUM, TMPD + | li TISNIL, LJ_TNIL + | st_vmstate + | + |->vm_call_dispatch: + | // TMP2 = old base, BASE = new base, RC = nargs*8, PC = caller PC + | lwz TMP0, FRAME_PC(BASE) + | lwz LFUNC:RB, FRAME_FUNC(BASE) + | checkfunc TMP0; bne ->vmeta_call + | + |->vm_call_dispatch_f: + | ins_call + | // BASE = new base, RB = func, RC = nargs*8, PC = caller PC + | + |->vm_cpcall: // Setup protected C frame, call C. + | // (lua_State *L, lua_CFunction func, void *ud, lua_CPFunction cp) + | saveregs + | mr L, CARG1 + | lwz TMP0, L:CARG1->stack + | stw CARG1, SAVE_L + | lp TMP1, L->top + | lwz DISPATCH, L->glref // Setup pointer to dispatch table. + | stw CARG1, SAVE_PC // Any value outside of bytecode is ok. + | sub TMP0, TMP0, TMP1 // Compute -savestack(L, L->top). + | lp TMP1, L->cframe + | addi DISPATCH, DISPATCH, GG_G2DISP + | .toc lp CARG4, 0(CARG4) + | li TMP2, 0 + | stw TMP0, SAVE_NRES // Neg. delta means cframe w/o frame. + | stw TMP2, SAVE_ERRF // No error function. + | stp TMP1, SAVE_CFRAME + | stp sp, L->cframe // Add our C frame to cframe chain. + | stw L, DISPATCH_GL(cur_L)(DISPATCH) + | mtctr CARG4 + | bctrl // (lua_State *L, lua_CFunction func, void *ud) + |.if PPE + | mr BASE, CRET1 + | cmpwi CRET1, 0 + |.else + | mr. BASE, CRET1 + |.endif + | li PC, FRAME_CP + | bne <3 // Else continue with the call. + | b ->vm_leave_cp // No base? Just remove C frame. + | + |//----------------------------------------------------------------------- + |//-- Metamethod handling ------------------------------------------------ + |//----------------------------------------------------------------------- + | + |// The lj_meta_* functions (except for lj_meta_cat) don't reallocate the + |// stack, so BASE doesn't need to be reloaded across these calls. + | + |//-- Continuation dispatch ---------------------------------------------- + | + |->cont_dispatch: + | // BASE = meta base, RA = resultptr, RD = (nresults+1)*8 + | lwz TMP0, -12(BASE) // Continuation. + | mr RB, BASE + | mr BASE, TMP2 // Restore caller BASE. + | lwz LFUNC:TMP1, FRAME_FUNC(TMP2) + |.if FFI + | cmplwi TMP0, 1 + |.endif + | lwz PC, -16(RB) // Restore PC from [cont|PC]. + | subi TMP2, RD, 8 + | lwz TMP1, LFUNC:TMP1->pc + | stwx TISNIL, RA, TMP2 // Ensure one valid arg. + |.if FFI + | ble >1 + |.endif + | lwz KBASE, PC2PROTO(k)(TMP1) + | // BASE = base, RA = resultptr, RB = meta base + | mtctr TMP0 + | bctr // Jump to continuation. + | + |.if FFI + |1: + | beq ->cont_ffi_callback // cont = 1: return from FFI callback. + | // cont = 0: tailcall from C function. + | subi TMP1, RB, 16 + | sub RC, TMP1, BASE + | b ->vm_call_tail + |.endif + | + |->cont_cat: // RA = resultptr, RB = meta base + | lwz INS, -4(PC) + | subi CARG2, RB, 16 + | decode_RB8 SAVE0, INS + | lfd f0, 0(RA) + | add TMP1, BASE, SAVE0 + | stp BASE, L->base + | cmplw TMP1, CARG2 + | sub CARG3, CARG2, TMP1 + | decode_RA8 RA, INS + | stfd f0, 0(CARG2) + | bney ->BC_CAT_Z + | stfdx f0, BASE, RA + | b ->cont_nop + | + |//-- Table indexing metamethods ----------------------------------------- + | + |->vmeta_tgets1: + | la CARG3, DISPATCH_GL(tmptv)(DISPATCH) + | li TMP0, LJ_TSTR + | decode_RB8 RB, INS + | stw STR:RC, 4(CARG3) + | add CARG2, BASE, RB + | stw TMP0, 0(CARG3) + | b >1 + | + |->vmeta_tgets: + | la CARG2, DISPATCH_GL(tmptv)(DISPATCH) + | li TMP0, LJ_TTAB + | stw TAB:RB, 4(CARG2) + | la CARG3, DISPATCH_GL(tmptv2)(DISPATCH) + | stw TMP0, 0(CARG2) + | li TMP1, LJ_TSTR + | stw STR:RC, 4(CARG3) + | stw TMP1, 0(CARG3) + | b >1 + | + |->vmeta_tgetb: // TMP0 = index + |.if not DUALNUM + | tonum_u f0, TMP0 + |.endif + | decode_RB8 RB, INS + | la CARG3, DISPATCH_GL(tmptv)(DISPATCH) + | add CARG2, BASE, RB + |.if DUALNUM + | stw TISNUM, 0(CARG3) + | stw TMP0, 4(CARG3) + |.else + | stfd f0, 0(CARG3) + |.endif + | b >1 + | + |->vmeta_tgetv: + | decode_RB8 RB, INS + | decode_RC8 RC, INS + | add CARG2, BASE, RB + | add CARG3, BASE, RC + |1: + | stp BASE, L->base + | mr CARG1, L + | stw PC, SAVE_PC + | bl extern lj_meta_tget // (lua_State *L, TValue *o, TValue *k) + | // Returns TValue * (finished) or NULL (metamethod). + | cmplwi CRET1, 0 + | beq >3 + | lfd f0, 0(CRET1) + | ins_next1 + | stfdx f0, BASE, RA + | ins_next2 + | + |3: // Call __index metamethod. + | // BASE = base, L->top = new base, stack = cont/func/t/k + | subfic TMP1, BASE, FRAME_CONT + | lp BASE, L->top + | stw PC, -16(BASE) // [cont|PC] + | add PC, TMP1, BASE + | lwz LFUNC:RB, FRAME_FUNC(BASE) // Guaranteed to be a function here. + | li NARGS8:RC, 16 // 2 args for func(t, k). + | b ->vm_call_dispatch_f + | + |->vmeta_tgetr: + | bl extern lj_tab_getinth // (GCtab *t, int32_t key) + | // Returns cTValue * or NULL. + | cmplwi CRET1, 0 + | beq >1 + | lfd f14, 0(CRET1) + | b ->BC_TGETR_Z + |1: + | stwx TISNIL, BASE, RA + | b ->cont_nop + | + |//----------------------------------------------------------------------- + | + |->vmeta_tsets1: + | la CARG3, DISPATCH_GL(tmptv)(DISPATCH) + | li TMP0, LJ_TSTR + | decode_RB8 RB, INS + | stw STR:RC, 4(CARG3) + | add CARG2, BASE, RB + | stw TMP0, 0(CARG3) + | b >1 + | + |->vmeta_tsets: + | la CARG2, DISPATCH_GL(tmptv)(DISPATCH) + | li TMP0, LJ_TTAB + | stw TAB:RB, 4(CARG2) + | la CARG3, DISPATCH_GL(tmptv2)(DISPATCH) + | stw TMP0, 0(CARG2) + | li TMP1, LJ_TSTR + | stw STR:RC, 4(CARG3) + | stw TMP1, 0(CARG3) + | b >1 + | + |->vmeta_tsetb: // TMP0 = index + |.if not DUALNUM + | tonum_u f0, TMP0 + |.endif + | decode_RB8 RB, INS + | la CARG3, DISPATCH_GL(tmptv)(DISPATCH) + | add CARG2, BASE, RB + |.if DUALNUM + | stw TISNUM, 0(CARG3) + | stw TMP0, 4(CARG3) + |.else + | stfd f0, 0(CARG3) + |.endif + | b >1 + | + |->vmeta_tsetv: + | decode_RB8 RB, INS + | decode_RC8 RC, INS + | add CARG2, BASE, RB + | add CARG3, BASE, RC + |1: + | stp BASE, L->base + | mr CARG1, L + | stw PC, SAVE_PC + | bl extern lj_meta_tset // (lua_State *L, TValue *o, TValue *k) + | // Returns TValue * (finished) or NULL (metamethod). + | cmplwi CRET1, 0 + | lfdx f0, BASE, RA + | beq >3 + | // NOBARRIER: lj_meta_tset ensures the table is not black. + | ins_next1 + | stfd f0, 0(CRET1) + | ins_next2 + | + |3: // Call __newindex metamethod. + | // BASE = base, L->top = new base, stack = cont/func/t/k/(v) + | subfic TMP1, BASE, FRAME_CONT + | lp BASE, L->top + | stw PC, -16(BASE) // [cont|PC] + | add PC, TMP1, BASE + | lwz LFUNC:RB, FRAME_FUNC(BASE) // Guaranteed to be a function here. + | li NARGS8:RC, 24 // 3 args for func(t, k, v) + | stfd f0, 16(BASE) // Copy value to third argument. + | b ->vm_call_dispatch_f + | + |->vmeta_tsetr: + | stp BASE, L->base + | stw PC, SAVE_PC + | bl extern lj_tab_setinth // (lua_State *L, GCtab *t, int32_t key) + | // Returns TValue *. + | stfd f14, 0(CRET1) + | b ->cont_nop + | + |//-- Comparison metamethods --------------------------------------------- + | + |->vmeta_comp: + | mr CARG1, L + | subi PC, PC, 4 + |.if DUALNUM + | mr CARG2, RA + |.else + | add CARG2, BASE, RA + |.endif + | stw PC, SAVE_PC + |.if DUALNUM + | mr CARG3, RD + |.else + | add CARG3, BASE, RD + |.endif + | stp BASE, L->base + | decode_OP1 CARG4, INS + | bl extern lj_meta_comp // (lua_State *L, TValue *o1, *o2, int op) + | // Returns 0/1 or TValue * (metamethod). + |3: + | cmplwi CRET1, 1 + | bgt ->vmeta_binop + | subfic CRET1, CRET1, 0 + |4: + | lwz INS, 0(PC) + | addi PC, PC, 4 + | decode_RD4 TMP2, INS + | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16) + | and TMP2, TMP2, CRET1 + | add PC, PC, TMP2 + |->cont_nop: + | ins_next + | + |->cont_ra: // RA = resultptr + | lwz INS, -4(PC) + | lfd f0, 0(RA) + | decode_RA8 TMP1, INS + | stfdx f0, BASE, TMP1 + | b ->cont_nop + | + |->cont_condt: // RA = resultptr + | lwz TMP0, 0(RA) + | .gpr64 extsw TMP0, TMP0 + | subfic TMP0, TMP0, LJ_TTRUE // Branch if result is true. + | subfe CRET1, CRET1, CRET1 + | not CRET1, CRET1 + | b <4 + | + |->cont_condf: // RA = resultptr + | lwz TMP0, 0(RA) + | .gpr64 extsw TMP0, TMP0 + | subfic TMP0, TMP0, LJ_TTRUE // Branch if result is false. + | subfe CRET1, CRET1, CRET1 + | b <4 + | + |->vmeta_equal: + | // CARG2, CARG3, CARG4 are already set by BC_ISEQV/BC_ISNEV. + | subi PC, PC, 4 + | stp BASE, L->base + | mr CARG1, L + | stw PC, SAVE_PC + | bl extern lj_meta_equal // (lua_State *L, GCobj *o1, *o2, int ne) + | // Returns 0/1 or TValue * (metamethod). + | b <3 + | + |->vmeta_equal_cd: + |.if FFI + | mr CARG2, INS + | subi PC, PC, 4 + | stp BASE, L->base + | mr CARG1, L + | stw PC, SAVE_PC + | bl extern lj_meta_equal_cd // (lua_State *L, BCIns op) + | // Returns 0/1 or TValue * (metamethod). + | b <3 + |.endif + | + |->vmeta_istype: + | subi PC, PC, 4 + | stp BASE, L->base + | srwi CARG2, RA, 3 + | mr CARG1, L + | srwi CARG3, RD, 3 + | stw PC, SAVE_PC + | bl extern lj_meta_istype // (lua_State *L, BCReg ra, BCReg tp) + | b ->cont_nop + | + |//-- Arithmetic metamethods --------------------------------------------- + | + |->vmeta_arith_nv: + | add CARG3, KBASE, RC + | add CARG4, BASE, RB + | b >1 + |->vmeta_arith_nv2: + |.if DUALNUM + | mr CARG3, RC + | mr CARG4, RB + | b >1 + |.endif + | + |->vmeta_unm: + | mr CARG3, RD + | mr CARG4, RD + | b >1 + | + |->vmeta_arith_vn: + | add CARG3, BASE, RB + | add CARG4, KBASE, RC + | b >1 + | + |->vmeta_arith_vv: + | add CARG3, BASE, RB + | add CARG4, BASE, RC + |.if DUALNUM + | b >1 + |.endif + |->vmeta_arith_vn2: + |->vmeta_arith_vv2: + |.if DUALNUM + | mr CARG3, RB + | mr CARG4, RC + |.endif + |1: + | add CARG2, BASE, RA + | stp BASE, L->base + | mr CARG1, L + | stw PC, SAVE_PC + | decode_OP1 CARG5, INS // Caveat: CARG5 overlaps INS. + | bl extern lj_meta_arith // (lua_State *L, TValue *ra,*rb,*rc, BCReg op) + | // Returns NULL (finished) or TValue * (metamethod). + | cmplwi CRET1, 0 + | beq ->cont_nop + | + | // Call metamethod for binary op. + |->vmeta_binop: + | // BASE = old base, CRET1 = new base, stack = cont/func/o1/o2 + | sub TMP1, CRET1, BASE + | stw PC, -16(CRET1) // [cont|PC] + | mr TMP2, BASE + | addi PC, TMP1, FRAME_CONT + | mr BASE, CRET1 + | li NARGS8:RC, 16 // 2 args for func(o1, o2). + | b ->vm_call_dispatch + | + |->vmeta_len: +#if LJ_52 + | mr SAVE0, CARG1 +#endif + | mr CARG2, RD + | stp BASE, L->base + | mr CARG1, L + | stw PC, SAVE_PC + | bl extern lj_meta_len // (lua_State *L, TValue *o) + | // Returns NULL (retry) or TValue * (metamethod base). +#if LJ_52 + | cmplwi CRET1, 0 + | bne ->vmeta_binop // Binop call for compatibility. + | mr CARG1, SAVE0 + | b ->BC_LEN_Z +#else + | b ->vmeta_binop // Binop call for compatibility. +#endif + | + |//-- Call metamethod ---------------------------------------------------- + | + |->vmeta_call: // Resolve and call __call metamethod. + | // TMP2 = old base, BASE = new base, RC = nargs*8 + | mr CARG1, L + | stp TMP2, L->base // This is the callers base! + | subi CARG2, BASE, 8 + | stw PC, SAVE_PC + | add CARG3, BASE, RC + | mr SAVE0, NARGS8:RC + | bl extern lj_meta_call // (lua_State *L, TValue *func, TValue *top) + | lwz LFUNC:RB, FRAME_FUNC(BASE) // Guaranteed to be a function here. + | addi NARGS8:RC, SAVE0, 8 // Got one more argument now. + | ins_call + | + |->vmeta_callt: // Resolve __call for BC_CALLT. + | // BASE = old base, RA = new base, RC = nargs*8 + | mr CARG1, L + | stp BASE, L->base + | subi CARG2, RA, 8 + | stw PC, SAVE_PC + | add CARG3, RA, RC + | mr SAVE0, NARGS8:RC + | bl extern lj_meta_call // (lua_State *L, TValue *func, TValue *top) + | lwz TMP1, FRAME_PC(BASE) + | addi NARGS8:RC, SAVE0, 8 // Got one more argument now. + | lwz LFUNC:RB, FRAME_FUNC(RA) // Guaranteed to be a function here. + | b ->BC_CALLT_Z + | + |//-- Argument coercion for 'for' statement ------------------------------ + | + |->vmeta_for: + | mr CARG1, L + | stp BASE, L->base + | mr CARG2, RA + | stw PC, SAVE_PC + | mr SAVE0, INS + | bl extern lj_meta_for // (lua_State *L, TValue *base) + |.if JIT + | decode_OP1 TMP0, SAVE0 + |.endif + | decode_RA8 RA, SAVE0 + |.if JIT + | cmpwi TMP0, BC_JFORI + |.endif + | decode_RD8 RD, SAVE0 + |.if JIT + | beqy =>BC_JFORI + |.endif + | b =>BC_FORI + | + |//----------------------------------------------------------------------- + |//-- Fast functions ----------------------------------------------------- + |//----------------------------------------------------------------------- + | + |.macro .ffunc, name + |->ff_ .. name: + |.endmacro + | + |.macro .ffunc_1, name + |->ff_ .. name: + | cmplwi NARGS8:RC, 8 + | lwz CARG3, 0(BASE) + | lwz CARG1, 4(BASE) + | blt ->fff_fallback + |.endmacro + | + |.macro .ffunc_2, name + |->ff_ .. name: + | cmplwi NARGS8:RC, 16 + | lwz CARG3, 0(BASE) + | lwz CARG4, 8(BASE) + | lwz CARG1, 4(BASE) + | lwz CARG2, 12(BASE) + | blt ->fff_fallback + |.endmacro + | + |.macro .ffunc_n, name + |->ff_ .. name: + | cmplwi NARGS8:RC, 8 + | lwz CARG3, 0(BASE) + | lfd FARG1, 0(BASE) + | blt ->fff_fallback + | checknum CARG3; bge ->fff_fallback + |.endmacro + | + |.macro .ffunc_nn, name + |->ff_ .. name: + | cmplwi NARGS8:RC, 16 + | lwz CARG3, 0(BASE) + | lfd FARG1, 0(BASE) + | lwz CARG4, 8(BASE) + | lfd FARG2, 8(BASE) + | blt ->fff_fallback + | checknum CARG3; bge ->fff_fallback + | checknum CARG4; bge ->fff_fallback + |.endmacro + | + |// Inlined GC threshold check. Caveat: uses TMP0 and TMP1. + |.macro ffgccheck + | lwz TMP0, DISPATCH_GL(gc.total)(DISPATCH) + | lwz TMP1, DISPATCH_GL(gc.threshold)(DISPATCH) + | cmplw TMP0, TMP1 + | bgel ->fff_gcstep + |.endmacro + | + |//-- Base library: checks ----------------------------------------------- + | + |.ffunc_1 assert + | li TMP1, LJ_TFALSE + | la RA, -8(BASE) + | cmplw cr1, CARG3, TMP1 + | lwz PC, FRAME_PC(BASE) + | bge cr1, ->fff_fallback + | stw CARG3, 0(RA) + | addi RD, NARGS8:RC, 8 // Compute (nresults+1)*8. + | stw CARG1, 4(RA) + | beq ->fff_res // Done if exactly 1 argument. + | li TMP1, 8 + | subi RC, RC, 8 + |1: + | cmplw TMP1, RC + | lfdx f0, BASE, TMP1 + | stfdx f0, RA, TMP1 + | addi TMP1, TMP1, 8 + | bney <1 + | b ->fff_res + | + |.ffunc type + | cmplwi NARGS8:RC, 8 + | lwz CARG1, 0(BASE) + | blt ->fff_fallback + | .gpr64 extsw CARG1, CARG1 + | subfc TMP0, TISNUM, CARG1 + | subfe TMP2, CARG1, CARG1 + | orc TMP1, TMP2, TMP0 + | addi TMP1, TMP1, ~LJ_TISNUM+1 + | slwi TMP1, TMP1, 3 + | la TMP2, CFUNC:RB->upvalue + | lfdx FARG1, TMP2, TMP1 + | b ->fff_resn + | + |//-- Base library: getters and setters --------------------------------- + | + |.ffunc_1 getmetatable + | checktab CARG3; bne >6 + |1: // Field metatable must be at same offset for GCtab and GCudata! + | lwz TAB:CARG1, TAB:CARG1->metatable + |2: + | li CARG3, LJ_TNIL + | cmplwi TAB:CARG1, 0 + | lwz STR:RC, DISPATCH_GL(gcroot[GCROOT_MMNAME+MM_metatable])(DISPATCH) + | beq ->fff_restv + | lwz TMP0, TAB:CARG1->hmask + | li CARG3, LJ_TTAB // Use metatable as default result. + | lwz TMP1, STR:RC->hash + | lwz NODE:TMP2, TAB:CARG1->node + | and TMP1, TMP1, TMP0 // idx = str->hash & tab->hmask + | slwi TMP0, TMP1, 5 + | slwi TMP1, TMP1, 3 + | sub TMP1, TMP0, TMP1 + | add NODE:TMP2, NODE:TMP2, TMP1 // node = tab->node + (idx*32-idx*8) + |3: // Rearranged logic, because we expect _not_ to find the key. + | lwz CARG4, NODE:TMP2->key + | lwz TMP0, 4+offsetof(Node, key)(NODE:TMP2) + | lwz CARG2, NODE:TMP2->val + | lwz TMP1, 4+offsetof(Node, val)(NODE:TMP2) + | checkstr CARG4; bne >4 + | cmpw TMP0, STR:RC; beq >5 + |4: + | lwz NODE:TMP2, NODE:TMP2->next + | cmplwi NODE:TMP2, 0 + | beq ->fff_restv // Not found, keep default result. + | b <3 + |5: + | checknil CARG2 + | beq ->fff_restv // Ditto for nil value. + | mr CARG3, CARG2 // Return value of mt.__metatable. + | mr CARG1, TMP1 + | b ->fff_restv + | + |6: + | cmpwi CARG3, LJ_TUDATA; beq <1 + | .gpr64 extsw CARG3, CARG3 + | subfc TMP0, TISNUM, CARG3 + | subfe TMP2, CARG3, CARG3 + | orc TMP1, TMP2, TMP0 + | addi TMP1, TMP1, ~LJ_TISNUM+1 + | slwi TMP1, TMP1, 2 + | la TMP2, DISPATCH_GL(gcroot[GCROOT_BASEMT])(DISPATCH) + | lwzx TAB:CARG1, TMP2, TMP1 + | b <2 + | + |.ffunc_2 setmetatable + | // Fast path: no mt for table yet and not clearing the mt. + | checktab CARG3; bne ->fff_fallback + | lwz TAB:TMP1, TAB:CARG1->metatable + | checktab CARG4; bne ->fff_fallback + | cmplwi TAB:TMP1, 0 + | lbz TMP3, TAB:CARG1->marked + | bne ->fff_fallback + | andix. TMP0, TMP3, LJ_GC_BLACK // isblack(table) + | stw TAB:CARG2, TAB:CARG1->metatable + | beq ->fff_restv + | barrierback TAB:CARG1, TMP3, TMP0 + | b ->fff_restv + | + |.ffunc rawget + | cmplwi NARGS8:RC, 16 + | lwz CARG4, 0(BASE) + | lwz TAB:CARG2, 4(BASE) + | blt ->fff_fallback + | checktab CARG4; bne ->fff_fallback + | la CARG3, 8(BASE) + | mr CARG1, L + | bl extern lj_tab_get // (lua_State *L, GCtab *t, cTValue *key) + | // Returns cTValue *. + | lfd FARG1, 0(CRET1) + | b ->fff_resn + | + |//-- Base library: conversions ------------------------------------------ + | + |.ffunc tonumber + | // Only handles the number case inline (without a base argument). + | cmplwi NARGS8:RC, 8 + | lwz CARG1, 0(BASE) + | lfd FARG1, 0(BASE) + | bne ->fff_fallback // Exactly one argument. + | checknum CARG1; bgt ->fff_fallback + | b ->fff_resn + | + |.ffunc_1 tostring + | // Only handles the string or number case inline. + | checkstr CARG3 + | // A __tostring method in the string base metatable is ignored. + | beq ->fff_restv // String key? + | // Handle numbers inline, unless a number base metatable is present. + | lwz TMP0, DISPATCH_GL(gcroot[GCROOT_BASEMT_NUM])(DISPATCH) + | checknum CARG3 + | cmplwi cr1, TMP0, 0 + | stp BASE, L->base // Add frame since C call can throw. + | crorc 4*cr0+eq, 4*cr0+gt, 4*cr1+eq + | stw PC, SAVE_PC // Redundant (but a defined value). + | beq ->fff_fallback + | ffgccheck + | mr CARG1, L + | mr CARG2, BASE + |.if DUALNUM + | bl extern lj_strfmt_number // (lua_State *L, cTValue *o) + |.else + | bl extern lj_strfmt_num // (lua_State *L, lua_Number *np) + |.endif + | // Returns GCstr *. + | li CARG3, LJ_TSTR + | b ->fff_restv + | + |//-- Base library: iterators ------------------------------------------- + | + |.ffunc next + | cmplwi NARGS8:RC, 8 + | lwz CARG1, 0(BASE) + | lwz TAB:CARG2, 4(BASE) + | blt ->fff_fallback + | stwx TISNIL, BASE, NARGS8:RC // Set missing 2nd arg to nil. + | checktab CARG1 + | lwz PC, FRAME_PC(BASE) + | bne ->fff_fallback + | stp BASE, L->base // Add frame since C call can throw. + | mr CARG1, L + | stp BASE, L->top // Dummy frame length is ok. + | la CARG3, 8(BASE) + | stw PC, SAVE_PC + | bl extern lj_tab_next // (lua_State *L, GCtab *t, TValue *key) + | // Returns 0 at end of traversal. + | cmplwi CRET1, 0 + | li CARG3, LJ_TNIL + | beq ->fff_restv // End of traversal: return nil. + | lfd f0, 8(BASE) // Copy key and value to results. + | la RA, -8(BASE) + | lfd f1, 16(BASE) + | stfd f0, 0(RA) + | li RD, (2+1)*8 + | stfd f1, 8(RA) + | b ->fff_res + | + |.ffunc_1 pairs + | checktab CARG3 + | lwz PC, FRAME_PC(BASE) + | bne ->fff_fallback +#if LJ_52 + | lwz TAB:TMP2, TAB:CARG1->metatable + | lfd f0, CFUNC:RB->upvalue[0] + | cmplwi TAB:TMP2, 0 + | la RA, -8(BASE) + | bne ->fff_fallback +#else + | lfd f0, CFUNC:RB->upvalue[0] + | la RA, -8(BASE) +#endif + | stw TISNIL, 8(BASE) + | li RD, (3+1)*8 + | stfd f0, 0(RA) + | b ->fff_res + | + |.ffunc ipairs_aux + | cmplwi NARGS8:RC, 16 + | lwz CARG3, 0(BASE) + | lwz TAB:CARG1, 4(BASE) + | lwz CARG4, 8(BASE) + |.if DUALNUM + | lwz TMP2, 12(BASE) + |.else + | lfd FARG2, 8(BASE) + |.endif + | blt ->fff_fallback + | checktab CARG3 + | checknum cr1, CARG4 + | lwz PC, FRAME_PC(BASE) + |.if DUALNUM + | bne ->fff_fallback + | bne cr1, ->fff_fallback + |.else + | lus TMP0, 0x3ff0 + | stw ZERO, TMPD_LO + | bne ->fff_fallback + | stw TMP0, TMPD_HI + | bge cr1, ->fff_fallback + | lfd FARG1, TMPD + | toint TMP2, FARG2, f0 + |.endif + | lwz TMP0, TAB:CARG1->asize + | lwz TMP1, TAB:CARG1->array + |.if not DUALNUM + | fadd FARG2, FARG2, FARG1 + |.endif + | addi TMP2, TMP2, 1 + | la RA, -8(BASE) + | cmplw TMP0, TMP2 + |.if DUALNUM + | stw TISNUM, 0(RA) + | slwi TMP3, TMP2, 3 + | stw TMP2, 4(RA) + |.else + | slwi TMP3, TMP2, 3 + | stfd FARG2, 0(RA) + |.endif + | ble >2 // Not in array part? + | lwzx TMP2, TMP1, TMP3 + | lfdx f0, TMP1, TMP3 + |1: + | checknil TMP2 + | li RD, (0+1)*8 + | beq ->fff_res // End of iteration, return 0 results. + | li RD, (2+1)*8 + | stfd f0, 8(RA) + | b ->fff_res + |2: // Check for empty hash part first. Otherwise call C function. + | lwz TMP0, TAB:CARG1->hmask + | cmplwi TMP0, 0 + | li RD, (0+1)*8 + | beq ->fff_res + | mr CARG2, TMP2 + | bl extern lj_tab_getinth // (GCtab *t, int32_t key) + | // Returns cTValue * or NULL. + | cmplwi CRET1, 0 + | li RD, (0+1)*8 + | beq ->fff_res + | lwz TMP2, 0(CRET1) + | lfd f0, 0(CRET1) + | b <1 + | + |.ffunc_1 ipairs + | checktab CARG3 + | lwz PC, FRAME_PC(BASE) + | bne ->fff_fallback +#if LJ_52 + | lwz TAB:TMP2, TAB:CARG1->metatable + | lfd f0, CFUNC:RB->upvalue[0] + | cmplwi TAB:TMP2, 0 + | la RA, -8(BASE) + | bne ->fff_fallback +#else + | lfd f0, CFUNC:RB->upvalue[0] + | la RA, -8(BASE) +#endif + |.if DUALNUM + | stw TISNUM, 8(BASE) + |.else + | stw ZERO, 8(BASE) + |.endif + | stw ZERO, 12(BASE) + | li RD, (3+1)*8 + | stfd f0, 0(RA) + | b ->fff_res + | + |//-- Base library: catch errors ---------------------------------------- + | + |.ffunc pcall + | cmplwi NARGS8:RC, 8 + | lbz TMP3, DISPATCH_GL(hookmask)(DISPATCH) + | blt ->fff_fallback + | mr TMP2, BASE + | la BASE, 8(BASE) + | // Remember active hook before pcall. + | rlwinm TMP3, TMP3, 32-HOOK_ACTIVE_SHIFT, 31, 31 + | subi NARGS8:RC, NARGS8:RC, 8 + | addi PC, TMP3, 8+FRAME_PCALL + | b ->vm_call_dispatch + | + |.ffunc xpcall + | cmplwi NARGS8:RC, 16 + | lwz CARG4, 8(BASE) + | lfd FARG2, 8(BASE) + | lfd FARG1, 0(BASE) + | blt ->fff_fallback + | lbz TMP1, DISPATCH_GL(hookmask)(DISPATCH) + | mr TMP2, BASE + | checkfunc CARG4; bne ->fff_fallback // Traceback must be a function. + | la BASE, 16(BASE) + | // Remember active hook before pcall. + | rlwinm TMP1, TMP1, 32-HOOK_ACTIVE_SHIFT, 31, 31 + | stfd FARG2, 0(TMP2) // Swap function and traceback. + | subi NARGS8:RC, NARGS8:RC, 16 + | stfd FARG1, 8(TMP2) + | addi PC, TMP1, 16+FRAME_PCALL + | b ->vm_call_dispatch + | + |//-- Coroutine library -------------------------------------------------- + | + |.macro coroutine_resume_wrap, resume + |.if resume + |.ffunc_1 coroutine_resume + | cmpwi CARG3, LJ_TTHREAD; bne ->fff_fallback + |.else + |.ffunc coroutine_wrap_aux + | lwz L:CARG1, CFUNC:RB->upvalue[0].gcr + |.endif + | lbz TMP0, L:CARG1->status + | lp TMP1, L:CARG1->cframe + | lp CARG2, L:CARG1->top + | cmplwi cr0, TMP0, LUA_YIELD + | lp TMP2, L:CARG1->base + | cmplwi cr1, TMP1, 0 + | lwz TMP0, L:CARG1->maxstack + | cmplw cr7, CARG2, TMP2 + | lwz PC, FRAME_PC(BASE) + | crorc 4*cr6+lt, 4*cr0+gt, 4*cr1+eq // st>LUA_YIELD || cframe!=0 + | add TMP2, CARG2, NARGS8:RC + | crandc 4*cr6+gt, 4*cr7+eq, 4*cr0+eq // base==top && st!=LUA_YIELD + | cmplw cr1, TMP2, TMP0 + | cror 4*cr6+lt, 4*cr6+lt, 4*cr6+gt + | stw PC, SAVE_PC + | cror 4*cr6+lt, 4*cr6+lt, 4*cr1+gt // cond1 || cond2 || stackov + | stp BASE, L->base + | blt cr6, ->fff_fallback + |1: + |.if resume + | addi BASE, BASE, 8 // Keep resumed thread in stack for GC. + | subi NARGS8:RC, NARGS8:RC, 8 + | subi TMP2, TMP2, 8 + |.endif + | stp TMP2, L:CARG1->top + | li TMP1, 0 + | stp BASE, L->top + |2: // Move args to coroutine. + | cmpw TMP1, NARGS8:RC + | lfdx f0, BASE, TMP1 + | beq >3 + | stfdx f0, CARG2, TMP1 + | addi TMP1, TMP1, 8 + | b <2 + |3: + | li CARG3, 0 + | mr L:SAVE0, L:CARG1 + | li CARG4, 0 + | bl ->vm_resume // (lua_State *L, TValue *base, 0, 0) + | // Returns thread status. + |4: + | lp TMP2, L:SAVE0->base + | cmplwi CRET1, LUA_YIELD + | lp TMP3, L:SAVE0->top + | li_vmstate INTERP + | lp BASE, L->base + | stw L, DISPATCH_GL(cur_L)(DISPATCH) + | st_vmstate + | bgt >8 + | sub RD, TMP3, TMP2 + | lwz TMP0, L->maxstack + | cmplwi RD, 0 + | add TMP1, BASE, RD + | beq >6 // No results? + | cmplw TMP1, TMP0 + | li TMP1, 0 + | bgt >9 // Need to grow stack? + | + | subi TMP3, RD, 8 + | stp TMP2, L:SAVE0->top // Clear coroutine stack. + |5: // Move results from coroutine. + | cmplw TMP1, TMP3 + | lfdx f0, TMP2, TMP1 + | stfdx f0, BASE, TMP1 + | addi TMP1, TMP1, 8 + | bne <5 + |6: + | andix. TMP0, PC, FRAME_TYPE + |.if resume + | li TMP1, LJ_TTRUE + | la RA, -8(BASE) + | stw TMP1, -8(BASE) // Prepend true to results. + | addi RD, RD, 16 + |.else + | mr RA, BASE + | addi RD, RD, 8 + |.endif + |7: + | stw PC, SAVE_PC + | mr MULTRES, RD + | beq ->BC_RET_Z + | b ->vm_return + | + |8: // Coroutine returned with error (at co->top-1). + |.if resume + | andix. TMP0, PC, FRAME_TYPE + | la TMP3, -8(TMP3) + | li TMP1, LJ_TFALSE + | lfd f0, 0(TMP3) + | stp TMP3, L:SAVE0->top // Remove error from coroutine stack. + | li RD, (2+1)*8 + | stw TMP1, -8(BASE) // Prepend false to results. + | la RA, -8(BASE) + | stfd f0, 0(BASE) // Copy error message. + | b <7 + |.else + | mr CARG1, L + | mr CARG2, L:SAVE0 + | bl extern lj_ffh_coroutine_wrap_err // (lua_State *L, lua_State *co) + |.endif + | + |9: // Handle stack expansion on return from yield. + | mr CARG1, L + | srwi CARG2, RD, 3 + | bl extern lj_state_growstack // (lua_State *L, int n) + | li CRET1, 0 + | b <4 + |.endmacro + | + | coroutine_resume_wrap 1 // coroutine.resume + | coroutine_resume_wrap 0 // coroutine.wrap + | + |.ffunc coroutine_yield + | lp TMP0, L->cframe + | add TMP1, BASE, NARGS8:RC + | stp BASE, L->base + | andix. TMP0, TMP0, CFRAME_RESUME + | stp TMP1, L->top + | li CRET1, LUA_YIELD + | beq ->fff_fallback + | stp ZERO, L->cframe + | stb CRET1, L->status + | b ->vm_leave_unw + | + |//-- Math library ------------------------------------------------------- + | + |.ffunc_1 math_abs + | checknum CARG3 + |.if DUALNUM + | bne >2 + | srawi TMP1, CARG1, 31 + | xor TMP2, TMP1, CARG1 + |.if GPR64 + | lus TMP0, 0x8000 + | sub CARG1, TMP2, TMP1 + | cmplw CARG1, TMP0 + | beq >1 + |.else + | sub. CARG1, TMP2, TMP1 + | blt >1 + |.endif + |->fff_resi: + | lwz PC, FRAME_PC(BASE) + | la RA, -8(BASE) + | stw TISNUM, -8(BASE) + | stw CRET1, -4(BASE) + | b ->fff_res1 + |1: + | lus CARG3, 0x41e0 // 2^31. + | li CARG1, 0 + | b ->fff_restv + |2: + |.endif + | bge ->fff_fallback + | rlwinm CARG3, CARG3, 0, 1, 31 + | // Fallthrough. + | + |->fff_restv: + | // CARG3/CARG1 = TValue result. + | lwz PC, FRAME_PC(BASE) + | stw CARG3, -8(BASE) + | la RA, -8(BASE) + | stw CARG1, -4(BASE) + |->fff_res1: + | // RA = results, PC = return. + | li RD, (1+1)*8 + |->fff_res: + | // RA = results, RD = (nresults+1)*8, PC = return. + | andix. TMP0, PC, FRAME_TYPE + | mr MULTRES, RD + | bney ->vm_return + | lwz INS, -4(PC) + | decode_RB8 RB, INS + |5: + | cmplw RB, RD // More results expected? + | decode_RA8 TMP0, INS + | bgt >6 + | ins_next1 + | // Adjust BASE. KBASE is assumed to be set for the calling frame. + | sub BASE, RA, TMP0 + | ins_next2 + | + |6: // Fill up results with nil. + | subi TMP1, RD, 8 + | addi RD, RD, 8 + | stwx TISNIL, RA, TMP1 + | b <5 + | + |.macro math_extern, func + | .ffunc_n math_ .. func + | blex func + | b ->fff_resn + |.endmacro + | + |.macro math_extern2, func + | .ffunc_nn math_ .. func + | blex func + | b ->fff_resn + |.endmacro + | + |.macro math_round, func + | .ffunc_1 math_ .. func + | checknum CARG3; beqy ->fff_restv + | rlwinm TMP2, CARG3, 12, 21, 31 + | bge ->fff_fallback + | addic. TMP2, TMP2, -1023 // exp = exponent(x) - 1023 + | cmplwi cr1, TMP2, 31 // 0 <= exp < 31? + | subfic TMP0, TMP2, 31 + | blt >3 + | slwi TMP1, CARG3, 11 + | srwi TMP3, CARG1, 21 + | oris TMP1, TMP1, 0x8000 + | addi TMP2, TMP2, 1 + | or TMP1, TMP1, TMP3 + | slwi CARG2, CARG1, 11 + | bge cr1, >4 + | slw TMP3, TMP1, TMP2 + | srw RD, TMP1, TMP0 + | or TMP3, TMP3, CARG2 + | srawi TMP2, CARG3, 31 + |.if "func" == "floor" + | and TMP1, TMP3, TMP2 + | addic TMP0, TMP1, -1 + | subfe TMP1, TMP0, TMP1 + | add CARG1, RD, TMP1 + | xor CARG1, CARG1, TMP2 + | sub CARG1, CARG1, TMP2 + | b ->fff_resi + |.else + | andc TMP1, TMP3, TMP2 + | addic TMP0, TMP1, -1 + | subfe TMP1, TMP0, TMP1 + | add CARG1, RD, TMP1 + | cmpw CARG1, RD + | xor CARG1, CARG1, TMP2 + | sub CARG1, CARG1, TMP2 + | bge ->fff_resi + | // Overflow to 2^31. + | lus CARG3, 0x41e0 // 2^31. + | li CARG1, 0 + | b ->fff_restv + |.endif + |3: // |x| < 1 + | slwi TMP2, CARG3, 1 + | srawi TMP1, CARG3, 31 + | or TMP2, CARG1, TMP2 // ztest = (hi+hi) | lo + |.if "func" == "floor" + | and TMP1, TMP2, TMP1 // (ztest & sign) == 0 ? 0 : -1 + | subfic TMP2, TMP1, 0 + | subfe CARG1, CARG1, CARG1 + |.else + | andc TMP1, TMP2, TMP1 // (ztest & ~sign) == 0 ? 0 : 1 + | addic TMP2, TMP1, -1 + | subfe CARG1, TMP2, TMP1 + |.endif + | b ->fff_resi + |4: // exp >= 31. Check for -(2^31). + | xoris TMP1, TMP1, 0x8000 + | srawi TMP2, CARG3, 31 + |.if "func" == "floor" + | or TMP1, TMP1, CARG2 + |.endif + |.if PPE + | orc TMP1, TMP1, TMP2 + | cmpwi TMP1, 0 + |.else + | orc. TMP1, TMP1, TMP2 + |.endif + | crand 4*cr0+eq, 4*cr0+eq, 4*cr1+eq + | lus CARG1, 0x8000 // -(2^31). + | beqy ->fff_resi + |5: + | lfd FARG1, 0(BASE) + | blex func + | b ->fff_resn + |.endmacro + | + |.if DUALNUM + | math_round floor + | math_round ceil + |.else + | // NYI: use internal implementation. + | math_extern floor + | math_extern ceil + |.endif + | + |.if SQRT + |.ffunc_n math_sqrt + | fsqrt FARG1, FARG1 + | b ->fff_resn + |.else + | math_extern sqrt + |.endif + | + |.ffunc math_log + | cmplwi NARGS8:RC, 8 + | lwz CARG3, 0(BASE) + | lfd FARG1, 0(BASE) + | bne ->fff_fallback // Need exactly 1 argument. + | checknum CARG3; bge ->fff_fallback + | blex log + | b ->fff_resn + | + | math_extern log10 + | math_extern exp + | math_extern sin + | math_extern cos + | math_extern tan + | math_extern asin + | math_extern acos + | math_extern atan + | math_extern sinh + | math_extern cosh + | math_extern tanh + | math_extern2 pow + | math_extern2 atan2 + | math_extern2 fmod + | + |.if DUALNUM + |.ffunc math_ldexp + | cmplwi NARGS8:RC, 16 + | lwz CARG3, 0(BASE) + | lfd FARG1, 0(BASE) + | lwz CARG4, 8(BASE) + |.if GPR64 + | lwz CARG2, 12(BASE) + |.else + | lwz CARG1, 12(BASE) + |.endif + | blt ->fff_fallback + | checknum CARG3; bge ->fff_fallback + | checknum CARG4; bne ->fff_fallback + |.else + |.ffunc_nn math_ldexp + |.if GPR64 + | toint CARG2, FARG2 + |.else + | toint CARG1, FARG2 + |.endif + |.endif + | blex ldexp + | b ->fff_resn + | + |.ffunc_n math_frexp + |.if GPR64 + | la CARG2, DISPATCH_GL(tmptv)(DISPATCH) + |.else + | la CARG1, DISPATCH_GL(tmptv)(DISPATCH) + |.endif + | lwz PC, FRAME_PC(BASE) + | blex frexp + | lwz TMP1, DISPATCH_GL(tmptv)(DISPATCH) + | la RA, -8(BASE) + |.if not DUALNUM + | tonum_i FARG2, TMP1 + |.endif + | stfd FARG1, 0(RA) + | li RD, (2+1)*8 + |.if DUALNUM + | stw TISNUM, 8(RA) + | stw TMP1, 12(RA) + |.else + | stfd FARG2, 8(RA) + |.endif + | b ->fff_res + | + |.ffunc_n math_modf + |.if GPR64 + | la CARG2, -8(BASE) + |.else + | la CARG1, -8(BASE) + |.endif + | lwz PC, FRAME_PC(BASE) + | blex modf + | la RA, -8(BASE) + | stfd FARG1, 0(BASE) + | li RD, (2+1)*8 + | b ->fff_res + | + |.macro math_minmax, name, ismax + |.if DUALNUM + | .ffunc_1 name + | checknum CARG3 + | addi TMP1, BASE, 8 + | add TMP2, BASE, NARGS8:RC + | bne >4 + |1: // Handle integers. + | lwz CARG4, 0(TMP1) + | cmplw cr1, TMP1, TMP2 + | lwz CARG2, 4(TMP1) + | bge cr1, ->fff_resi + | checknum CARG4 + | xoris TMP0, CARG1, 0x8000 + | xoris TMP3, CARG2, 0x8000 + | bne >3 + | subfc TMP3, TMP3, TMP0 + | subfe TMP0, TMP0, TMP0 + |.if ismax + | andc TMP3, TMP3, TMP0 + |.else + | and TMP3, TMP3, TMP0 + |.endif + | add CARG1, TMP3, CARG2 + |.if GPR64 + | rldicl CARG1, CARG1, 0, 32 + |.endif + | addi TMP1, TMP1, 8 + | b <1 + |3: + | bge ->fff_fallback + | // Convert intermediate result to number and continue below. + | tonum_i FARG1, CARG1 + | lfd FARG2, 0(TMP1) + | b >6 + |4: + | lfd FARG1, 0(BASE) + | bge ->fff_fallback + |5: // Handle numbers. + | lwz CARG4, 0(TMP1) + | cmplw cr1, TMP1, TMP2 + | lfd FARG2, 0(TMP1) + | bge cr1, ->fff_resn + | checknum CARG4; bge >7 + |6: + | fsub f0, FARG1, FARG2 + | addi TMP1, TMP1, 8 + |.if ismax + | fsel FARG1, f0, FARG1, FARG2 + |.else + | fsel FARG1, f0, FARG2, FARG1 + |.endif + | b <5 + |7: // Convert integer to number and continue above. + | lwz CARG2, 4(TMP1) + | bne ->fff_fallback + | tonum_i FARG2, CARG2 + | b <6 + |.else + | .ffunc_n name + | li TMP1, 8 + |1: + | lwzx CARG2, BASE, TMP1 + | lfdx FARG2, BASE, TMP1 + | cmplw cr1, TMP1, NARGS8:RC + | checknum CARG2 + | bge cr1, ->fff_resn + | bge ->fff_fallback + | fsub f0, FARG1, FARG2 + | addi TMP1, TMP1, 8 + |.if ismax + | fsel FARG1, f0, FARG1, FARG2 + |.else + | fsel FARG1, f0, FARG2, FARG1 + |.endif + | b <1 + |.endif + |.endmacro + | + | math_minmax math_min, 0 + | math_minmax math_max, 1 + | + |//-- String library ----------------------------------------------------- + | + |.ffunc string_byte // Only handle the 1-arg case here. + | cmplwi NARGS8:RC, 8 + | lwz CARG3, 0(BASE) + | lwz STR:CARG1, 4(BASE) + | bne ->fff_fallback // Need exactly 1 argument. + | checkstr CARG3 + | bne ->fff_fallback + | lwz TMP0, STR:CARG1->len + |.if DUALNUM + | lbz CARG1, STR:CARG1[1] // Access is always ok (NUL at end). + | li RD, (0+1)*8 + | lwz PC, FRAME_PC(BASE) + | cmplwi TMP0, 0 + | la RA, -8(BASE) + | beqy ->fff_res + | b ->fff_resi + |.else + | lbz TMP1, STR:CARG1[1] // Access is always ok (NUL at end). + | addic TMP3, TMP0, -1 // RD = ((str->len != 0)+1)*8 + | subfe RD, TMP3, TMP0 + | stw TMP1, TONUM_LO // Inlined tonum_u f0, TMP1. + | addi RD, RD, 1 + | lfd f0, TONUM_D + | la RA, -8(BASE) + | lwz PC, FRAME_PC(BASE) + | fsub f0, f0, TOBIT + | slwi RD, RD, 3 + | stfd f0, 0(RA) + | b ->fff_res + |.endif + | + |.ffunc string_char // Only handle the 1-arg case here. + | ffgccheck + | cmplwi NARGS8:RC, 8 + | lwz CARG3, 0(BASE) + |.if DUALNUM + | lwz TMP0, 4(BASE) + | bne ->fff_fallback // Exactly 1 argument. + | checknum CARG3; bne ->fff_fallback + | la CARG2, 7(BASE) + |.else + | lfd FARG1, 0(BASE) + | bne ->fff_fallback // Exactly 1 argument. + | checknum CARG3; bge ->fff_fallback + | toint TMP0, FARG1 + | la CARG2, TMPD_BLO + |.endif + | li CARG3, 1 + | cmplwi TMP0, 255; bgt ->fff_fallback + |->fff_newstr: + | mr CARG1, L + | stp BASE, L->base + | stw PC, SAVE_PC + | bl extern lj_str_new // (lua_State *L, char *str, size_t l) + |->fff_resstr: + | // Returns GCstr *. + | lp BASE, L->base + | li CARG3, LJ_TSTR + | b ->fff_restv + | + |.ffunc string_sub + | ffgccheck + | cmplwi NARGS8:RC, 16 + | lwz CARG3, 16(BASE) + |.if not DUALNUM + | lfd f0, 16(BASE) + |.endif + | lwz TMP0, 0(BASE) + | lwz STR:CARG1, 4(BASE) + | blt ->fff_fallback + | lwz CARG2, 8(BASE) + |.if DUALNUM + | lwz TMP1, 12(BASE) + |.else + | lfd f1, 8(BASE) + |.endif + | li TMP2, -1 + | beq >1 + |.if DUALNUM + | checknum CARG3 + | lwz TMP2, 20(BASE) + | bne ->fff_fallback + |1: + | checknum CARG2; bne ->fff_fallback + |.else + | checknum CARG3; bge ->fff_fallback + | toint TMP2, f0 + |1: + | checknum CARG2; bge ->fff_fallback + |.endif + | checkstr TMP0; bne ->fff_fallback + |.if not DUALNUM + | toint TMP1, f1 + |.endif + | lwz TMP0, STR:CARG1->len + | cmplw TMP0, TMP2 // len < end? (unsigned compare) + | addi TMP3, TMP2, 1 + | blt >5 + |2: + | cmpwi TMP1, 0 // start <= 0? + | add TMP3, TMP1, TMP0 + | ble >7 + |3: + | sub CARG3, TMP2, TMP1 + | addi CARG2, STR:CARG1, #STR-1 + | srawi TMP0, CARG3, 31 + | addi CARG3, CARG3, 1 + | add CARG2, CARG2, TMP1 + | andc CARG3, CARG3, TMP0 + |.if GPR64 + | rldicl CARG2, CARG2, 0, 32 + | rldicl CARG3, CARG3, 0, 32 + |.endif + | b ->fff_newstr + | + |5: // Negative end or overflow. + | cmpw TMP0, TMP2 // len >= end? (signed compare) + | add TMP2, TMP0, TMP3 // Negative end: end = end+len+1. + | bge <2 + | mr TMP2, TMP0 // Overflow: end = len. + | b <2 + | + |7: // Negative start or underflow. + | .gpr64 extsw TMP1, TMP1 + | addic CARG3, TMP1, -1 + | subfe CARG3, CARG3, CARG3 + | srawi CARG2, TMP3, 31 // Note: modifies carry. + | andc TMP3, TMP3, CARG3 + | andc TMP1, TMP3, CARG2 + | addi TMP1, TMP1, 1 // start = 1 + (start ? start+len : 0) + | b <3 + | + |.macro ffstring_op, name + | .ffunc string_ .. name + | ffgccheck + | cmplwi NARGS8:RC, 8 + | lwz CARG3, 0(BASE) + | lwz STR:CARG2, 4(BASE) + | blt ->fff_fallback + | checkstr CARG3 + | la SBUF:CARG1, DISPATCH_GL(tmpbuf)(DISPATCH) + | bne ->fff_fallback + | lwz TMP0, SBUF:CARG1->b + | stw L, SBUF:CARG1->L + | stp BASE, L->base + | stw PC, SAVE_PC + | stw TMP0, SBUF:CARG1->p + | bl extern lj_buf_putstr_ .. name + | bl extern lj_buf_tostr + | b ->fff_resstr + |.endmacro + | + |ffstring_op reverse + |ffstring_op lower + |ffstring_op upper + | + |//-- Bit library -------------------------------------------------------- + | + |.macro .ffunc_bit, name + |.if DUALNUM + | .ffunc_1 bit_..name + | checknum CARG3; bnel ->fff_tobit_fb + |.else + | .ffunc_n bit_..name + | fadd FARG1, FARG1, TOBIT + | stfd FARG1, TMPD + | lwz CARG1, TMPD_LO + |.endif + |.endmacro + | + |.macro .ffunc_bit_op, name, ins + | .ffunc_bit name + | addi TMP1, BASE, 8 + | add TMP2, BASE, NARGS8:RC + |1: + | lwz CARG4, 0(TMP1) + | cmplw cr1, TMP1, TMP2 + |.if DUALNUM + | lwz CARG2, 4(TMP1) + |.else + | lfd FARG1, 0(TMP1) + |.endif + | bgey cr1, ->fff_resi + | checknum CARG4 + |.if DUALNUM + | bnel ->fff_bitop_fb + |.else + | fadd FARG1, FARG1, TOBIT + | bge ->fff_fallback + | stfd FARG1, TMPD + | lwz CARG2, TMPD_LO + |.endif + | ins CARG1, CARG1, CARG2 + | addi TMP1, TMP1, 8 + | b <1 + |.endmacro + | + |.ffunc_bit_op band, and + |.ffunc_bit_op bor, or + |.ffunc_bit_op bxor, xor + | + |.ffunc_bit bswap + | rotlwi TMP0, CARG1, 8 + | rlwimi TMP0, CARG1, 24, 0, 7 + | rlwimi TMP0, CARG1, 24, 16, 23 + | mr CRET1, TMP0 + | b ->fff_resi + | + |.ffunc_bit bnot + | not CRET1, CARG1 + | b ->fff_resi + | + |.macro .ffunc_bit_sh, name, ins, shmod + |.if DUALNUM + | .ffunc_2 bit_..name + | checknum CARG3; bnel ->fff_tobit_fb + | // Note: no inline conversion from number for 2nd argument! + | checknum CARG4; bne ->fff_fallback + |.else + | .ffunc_nn bit_..name + | fadd FARG1, FARG1, TOBIT + | fadd FARG2, FARG2, TOBIT + | stfd FARG1, TMPD + | lwz CARG1, TMPD_LO + | stfd FARG2, TMPD + | lwz CARG2, TMPD_LO + |.endif + |.if shmod == 1 + | rlwinm CARG2, CARG2, 0, 27, 31 + |.elif shmod == 2 + | neg CARG2, CARG2 + |.endif + | ins CRET1, CARG1, CARG2 + | b ->fff_resi + |.endmacro + | + |.ffunc_bit_sh lshift, slw, 1 + |.ffunc_bit_sh rshift, srw, 1 + |.ffunc_bit_sh arshift, sraw, 1 + |.ffunc_bit_sh rol, rotlw, 0 + |.ffunc_bit_sh ror, rotlw, 2 + | + |.ffunc_bit tobit + |.if DUALNUM + | b ->fff_resi + |.else + |->fff_resi: + | tonum_i FARG1, CRET1 + |.endif + |->fff_resn: + | lwz PC, FRAME_PC(BASE) + | la RA, -8(BASE) + | stfd FARG1, -8(BASE) + | b ->fff_res1 + | + |// Fallback FP number to bit conversion. + |->fff_tobit_fb: + |.if DUALNUM + | lfd FARG1, 0(BASE) + | bgt ->fff_fallback + | fadd FARG1, FARG1, TOBIT + | stfd FARG1, TMPD + | lwz CARG1, TMPD_LO + | blr + |.endif + |->fff_bitop_fb: + |.if DUALNUM + | lfd FARG1, 0(TMP1) + | bgt ->fff_fallback + | fadd FARG1, FARG1, TOBIT + | stfd FARG1, TMPD + | lwz CARG2, TMPD_LO + | blr + |.endif + | + |//----------------------------------------------------------------------- + | + |->fff_fallback: // Call fast function fallback handler. + | // BASE = new base, RB = CFUNC, RC = nargs*8 + | lp TMP3, CFUNC:RB->f + | add TMP1, BASE, NARGS8:RC + | lwz PC, FRAME_PC(BASE) // Fallback may overwrite PC. + | addi TMP0, TMP1, 8*LUA_MINSTACK + | lwz TMP2, L->maxstack + | stw PC, SAVE_PC // Redundant (but a defined value). + | .toc lp TMP3, 0(TMP3) + | cmplw TMP0, TMP2 + | stp BASE, L->base + | stp TMP1, L->top + | mr CARG1, L + | bgt >5 // Need to grow stack. + | mtctr TMP3 + | bctrl // (lua_State *L) + | // Either throws an error, or recovers and returns -1, 0 or nresults+1. + | lp BASE, L->base + | cmpwi CRET1, 0 + | slwi RD, CRET1, 3 + | la RA, -8(BASE) + | bgt ->fff_res // Returned nresults+1? + |1: // Returned 0 or -1: retry fast path. + | lp TMP0, L->top + | lwz LFUNC:RB, FRAME_FUNC(BASE) + | sub NARGS8:RC, TMP0, BASE + | bne ->vm_call_tail // Returned -1? + | ins_callt // Returned 0: retry fast path. + | + |// Reconstruct previous base for vmeta_call during tailcall. + |->vm_call_tail: + | andix. TMP0, PC, FRAME_TYPE + | rlwinm TMP1, PC, 0, 0, 28 + | bne >3 + | lwz INS, -4(PC) + | decode_RA8 TMP1, INS + | addi TMP1, TMP1, 8 + |3: + | sub TMP2, BASE, TMP1 + | b ->vm_call_dispatch // Resolve again for tailcall. + | + |5: // Grow stack for fallback handler. + | li CARG2, LUA_MINSTACK + | bl extern lj_state_growstack // (lua_State *L, int n) + | lp BASE, L->base + | cmpw TMP0, TMP0 // Set 4*cr0+eq to force retry. + | b <1 + | + |->fff_gcstep: // Call GC step function. + | // BASE = new base, RC = nargs*8 + | mflr SAVE0 + | stp BASE, L->base + | add TMP0, BASE, NARGS8:RC + | stw PC, SAVE_PC // Redundant (but a defined value). + | stp TMP0, L->top + | mr CARG1, L + | bl extern lj_gc_step // (lua_State *L) + | lp BASE, L->base + | mtlr SAVE0 + | lp TMP0, L->top + | sub NARGS8:RC, TMP0, BASE + | lwz CFUNC:RB, FRAME_FUNC(BASE) + | blr + | + |//----------------------------------------------------------------------- + |//-- Special dispatch targets ------------------------------------------- + |//----------------------------------------------------------------------- + | + |->vm_record: // Dispatch target for recording phase. + |.if JIT + | lbz TMP3, DISPATCH_GL(hookmask)(DISPATCH) + | andix. TMP0, TMP3, HOOK_VMEVENT // No recording while in vmevent. + | bne >5 + | // Decrement the hookcount for consistency, but always do the call. + | lwz TMP2, DISPATCH_GL(hookcount)(DISPATCH) + | andix. TMP0, TMP3, HOOK_ACTIVE + | bne >1 + | subi TMP2, TMP2, 1 + | andi. TMP0, TMP3, LUA_MASKLINE|LUA_MASKCOUNT + | beqy >1 + | stw TMP2, DISPATCH_GL(hookcount)(DISPATCH) + | b >1 + |.endif + | + |->vm_rethook: // Dispatch target for return hooks. + | lbz TMP3, DISPATCH_GL(hookmask)(DISPATCH) + | andix. TMP0, TMP3, HOOK_ACTIVE // Hook already active? + | beq >1 + |5: // Re-dispatch to static ins. + | addi TMP1, TMP1, GG_DISP2STATIC // Assumes decode_OPP TMP1, INS. + | lpx TMP0, DISPATCH, TMP1 + | mtctr TMP0 + | bctr + | + |->vm_inshook: // Dispatch target for instr/line hooks. + | lbz TMP3, DISPATCH_GL(hookmask)(DISPATCH) + | lwz TMP2, DISPATCH_GL(hookcount)(DISPATCH) + | andix. TMP0, TMP3, HOOK_ACTIVE // Hook already active? + | rlwinm TMP0, TMP3, 31-LUA_HOOKLINE, 31, 0 + | bne <5 + | + | cmpwi cr1, TMP0, 0 + | addic. TMP2, TMP2, -1 + | beq cr1, <5 + | stw TMP2, DISPATCH_GL(hookcount)(DISPATCH) + | beq >1 + | bge cr1, <5 + |1: + | mr CARG1, L + | stw MULTRES, SAVE_MULTRES + | mr CARG2, PC + | stp BASE, L->base + | // SAVE_PC must hold the _previous_ PC. The callee updates it with PC. + | bl extern lj_dispatch_ins // (lua_State *L, const BCIns *pc) + |3: + | lp BASE, L->base + |4: // Re-dispatch to static ins. + | lwz INS, -4(PC) + | decode_OPP TMP1, INS + | decode_RB8 RB, INS + | addi TMP1, TMP1, GG_DISP2STATIC + | decode_RD8 RD, INS + | lpx TMP0, DISPATCH, TMP1 + | decode_RA8 RA, INS + | decode_RC8 RC, INS + | mtctr TMP0 + | bctr + | + |->cont_hook: // Continue from hook yield. + | addi PC, PC, 4 + | lwz MULTRES, -20(RB) // Restore MULTRES for *M ins. + | b <4 + | + |->vm_hotloop: // Hot loop counter underflow. + |.if JIT + | lwz LFUNC:TMP1, FRAME_FUNC(BASE) + | addi CARG1, DISPATCH, GG_DISP2J + | stw PC, SAVE_PC + | lwz TMP1, LFUNC:TMP1->pc + | mr CARG2, PC + | stw L, DISPATCH_J(L)(DISPATCH) + | lbz TMP1, PC2PROTO(framesize)(TMP1) + | stp BASE, L->base + | slwi TMP1, TMP1, 3 + | add TMP1, BASE, TMP1 + | stp TMP1, L->top + | bl extern lj_trace_hot // (jit_State *J, const BCIns *pc) + | b <3 + |.endif + | + |->vm_callhook: // Dispatch target for call hooks. + | mr CARG2, PC + |.if JIT + | b >1 + |.endif + | + |->vm_hotcall: // Hot call counter underflow. + |.if JIT + | ori CARG2, PC, 1 + |1: + |.endif + | add TMP0, BASE, RC + | stw PC, SAVE_PC + | mr CARG1, L + | stp BASE, L->base + | sub RA, RA, BASE + | stp TMP0, L->top + | bl extern lj_dispatch_call // (lua_State *L, const BCIns *pc) + | // Returns ASMFunction. + | lp BASE, L->base + | lp TMP0, L->top + | stw ZERO, SAVE_PC // Invalidate for subsequent line hook. + | sub NARGS8:RC, TMP0, BASE + | add RA, BASE, RA + | lwz LFUNC:RB, FRAME_FUNC(BASE) + | lwz INS, -4(PC) + | mtctr CRET1 + | bctr + | + |->cont_stitch: // Trace stitching. + |.if JIT + | // RA = resultptr, RB = meta base + | lwz INS, -4(PC) + | lwz TMP3, -20(RB) // Save previous trace number. + | addic. TMP1, MULTRES, -8 + | decode_RA8 RC, INS // Call base. + | beq >2 + |1: // Move results down. + | lfd f0, 0(RA) + | addic. TMP1, TMP1, -8 + | addi RA, RA, 8 + | stfdx f0, BASE, RC + | addi RC, RC, 8 + | bne <1 + |2: + | decode_RA8 RA, INS + | decode_RB8 RB, INS + | add RA, RA, RB + | lwz TMP1, DISPATCH_J(trace)(DISPATCH) + |3: + | cmplw RA, RC + | bgt >9 // More results wanted? + | + | slwi TMP2, TMP3, 2 + | lwzx TRACE:TMP2, TMP1, TMP2 + | cmpwi TRACE:TMP2, 0 + | beq ->cont_nop + | lhz RD, TRACE:TMP2->link + | cmpw RD, TMP3 + | cmpwi cr1, RD, 0 + | beq ->cont_nop // Blacklisted. + | slwi RD, RD, 3 + | bne cr1, =>BC_JLOOP // Jump to stitched trace. + | + | // Stitch a new trace to the previous trace. + | stw TMP3, DISPATCH_J(exitno)(DISPATCH) + | stp L, DISPATCH_J(L)(DISPATCH) + | stp BASE, L->base + | addi CARG1, DISPATCH, GG_DISP2J + | mr CARG2, PC + | bl extern lj_dispatch_stitch // (jit_State *J, const BCIns *pc) + | lp BASE, L->base + | b ->cont_nop + | + |9: + | stwx TISNIL, BASE, RC + | addi RC, RC, 8 + | b <3 + |.endif + | + |->vm_profhook: // Dispatch target for profiler hook. +#if LJ_HASPROFILE + | mr CARG1, L + | stw MULTRES, SAVE_MULTRES + | mr CARG2, PC + | stp BASE, L->base + | bl extern lj_dispatch_profile // (lua_State *L, const BCIns *pc) + | // HOOK_PROFILE is off again, so re-dispatch to dynamic instruction. + | lp BASE, L->base + | subi PC, PC, 4 + | b ->cont_nop +#endif + | + |//----------------------------------------------------------------------- + |//-- Trace exit handler ------------------------------------------------- + |//----------------------------------------------------------------------- + | + |.macro savex_, a, b, c, d + | stfd f..a, 16+a*8(sp) + | stfd f..b, 16+b*8(sp) + | stfd f..c, 16+c*8(sp) + | stfd f..d, 16+d*8(sp) + |.endmacro + | + |->vm_exit_handler: + |.if JIT + | addi sp, sp, -(16+32*8+32*4) + | stmw r2, 16+32*8+2*4(sp) + | addi DISPATCH, JGL, -GG_DISP2G-32768 + | li CARG2, ~LJ_VMST_EXIT + | lwz CARG1, 16+32*8+32*4(sp) // Get stack chain. + | stw CARG2, DISPATCH_GL(vmstate)(DISPATCH) + | savex_ 0,1,2,3 + | stw CARG1, 0(sp) // Store extended stack chain. + | clrso TMP1 + | savex_ 4,5,6,7 + | addi CARG2, sp, 16+32*8+32*4 // Recompute original value of sp. + | savex_ 8,9,10,11 + | stw CARG2, 16+32*8+1*4(sp) // Store sp in RID_SP. + | savex_ 12,13,14,15 + | mflr CARG3 + | li TMP1, 0 + | savex_ 16,17,18,19 + | stw TMP1, 16+32*8+0*4(sp) // Clear RID_TMP. + | savex_ 20,21,22,23 + | lhz CARG4, 2(CARG3) // Load trace number. + | savex_ 24,25,26,27 + | lwz L, DISPATCH_GL(cur_L)(DISPATCH) + | savex_ 28,29,30,31 + | sub CARG3, TMP0, CARG3 // Compute exit number. + | lp BASE, DISPATCH_GL(jit_base)(DISPATCH) + | srwi CARG3, CARG3, 2 + | stp L, DISPATCH_J(L)(DISPATCH) + | subi CARG3, CARG3, 2 + | stp BASE, L->base + | stw CARG4, DISPATCH_J(parent)(DISPATCH) + | stw TMP1, DISPATCH_GL(jit_base)(DISPATCH) + | addi CARG1, DISPATCH, GG_DISP2J + | stw CARG3, DISPATCH_J(exitno)(DISPATCH) + | addi CARG2, sp, 16 + | bl extern lj_trace_exit // (jit_State *J, ExitState *ex) + | // Returns MULTRES (unscaled) or negated error code. + | lp TMP1, L->cframe + | lwz TMP2, 0(sp) + | lp BASE, L->base + |.if GPR64 + | rldicr sp, TMP1, 0, 61 + |.else + | rlwinm sp, TMP1, 0, 0, 29 + |.endif + | lwz PC, SAVE_PC // Get SAVE_PC. + | stw TMP2, 0(sp) + | stw L, SAVE_L // Set SAVE_L (on-trace resume/yield). + | b >1 + |.endif + |->vm_exit_interp: + |.if JIT + | // CARG1 = MULTRES or negated error code, BASE, PC and JGL set. + | lwz L, SAVE_L + | addi DISPATCH, JGL, -GG_DISP2G-32768 + | stp BASE, L->base + |1: + | cmpwi CARG1, 0 + | blt >9 // Check for error from exit. + | lwz LFUNC:RB, FRAME_FUNC(BASE) + | slwi MULTRES, CARG1, 3 + | li TMP2, 0 + | stw MULTRES, SAVE_MULTRES + | lwz TMP1, LFUNC:RB->pc + | stw TMP2, DISPATCH_GL(jit_base)(DISPATCH) + | lwz KBASE, PC2PROTO(k)(TMP1) + | // Setup type comparison constants. + | li TISNUM, LJ_TISNUM + | lus TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float). + | stw TMP3, TMPD + | li ZERO, 0 + | ori TMP3, TMP3, 0x0004 // TONUM = 2^52 + 2^51 + 2^31 (float). + | lfs TOBIT, TMPD + | stw TMP3, TMPD + | lus TMP0, 0x4338 // Hiword of 2^52 + 2^51 (double) + | li TISNIL, LJ_TNIL + | stw TMP0, TONUM_HI + | lfs TONUM, TMPD + | // Modified copy of ins_next which handles function header dispatch, too. + | lwz INS, 0(PC) + | addi PC, PC, 4 + | // Assumes TISNIL == ~LJ_VMST_INTERP == -1. + | stw TISNIL, DISPATCH_GL(vmstate)(DISPATCH) + | decode_OPP TMP1, INS + | decode_RA8 RA, INS + | lpx TMP0, DISPATCH, TMP1 + | mtctr TMP0 + | cmplwi TMP1, BC_FUNCF*4 // Function header? + | bge >2 + | decode_RB8 RB, INS + | decode_RD8 RD, INS + | decode_RC8 RC, INS + | bctr + |2: + | cmplwi TMP1, (BC_FUNCC+2)*4 // Fast function? + | blt >3 + | // Check frame below fast function. + | lwz TMP1, FRAME_PC(BASE) + | andix. TMP0, TMP1, FRAME_TYPE + | bney >3 // Trace stitching continuation? + | // Otherwise set KBASE for Lua function below fast function. + | lwz TMP2, -4(TMP1) + | decode_RA8 TMP0, TMP2 + | sub TMP1, BASE, TMP0 + | lwz LFUNC:TMP2, -12(TMP1) + | lwz TMP1, LFUNC:TMP2->pc + | lwz KBASE, PC2PROTO(k)(TMP1) + |3: + | subi RC, MULTRES, 8 + | add RA, RA, BASE + | bctr + | + |9: // Rethrow error from the right C frame. + | neg CARG2, CARG1 + | mr CARG1, L + | bl extern lj_err_throw // (lua_State *L, int errcode) + |.endif + | + |//----------------------------------------------------------------------- + |//-- Math helper functions ---------------------------------------------- + |//----------------------------------------------------------------------- + | + |// NYI: Use internal implementations of floor, ceil, trunc. + | + |->vm_modi: + | divwo. TMP0, CARG1, CARG2 + | bso >1 + |.if GPR64 + | xor CARG3, CARG1, CARG2 + | cmpwi CARG3, 0 + |.else + | xor. CARG3, CARG1, CARG2 + |.endif + | mullw TMP0, TMP0, CARG2 + | sub CARG1, CARG1, TMP0 + | bgelr + | cmpwi CARG1, 0; beqlr + | add CARG1, CARG1, CARG2 + | blr + |1: + | cmpwi CARG2, 0 + | li CARG1, 0 + | beqlr + | clrso TMP0 // Clear SO for -2147483648 % -1 and return 0. + | blr + | + |//----------------------------------------------------------------------- + |//-- Miscellaneous functions -------------------------------------------- + |//----------------------------------------------------------------------- + | + |// void lj_vm_cachesync(void *start, void *end) + |// Flush D-Cache and invalidate I-Cache. Assumes 32 byte cache line size. + |// This is a good lower bound, except for very ancient PPC models. + |->vm_cachesync: + |.if JIT or FFI + | // Compute start of first cache line and number of cache lines. + | rlwinm CARG1, CARG1, 0, 0, 26 + | sub CARG2, CARG2, CARG1 + | addi CARG2, CARG2, 31 + | rlwinm. CARG2, CARG2, 27, 5, 31 + | beqlr + | mtctr CARG2 + | mr CARG3, CARG1 + |1: // Flush D-Cache. + | dcbst r0, CARG1 + | addi CARG1, CARG1, 32 + | bdnz <1 + | sync + | mtctr CARG2 + |1: // Invalidate I-Cache. + | icbi r0, CARG3 + | addi CARG3, CARG3, 32 + | bdnz <1 + | isync + | blr + |.endif + | + |//----------------------------------------------------------------------- + |//-- FFI helper functions ----------------------------------------------- + |//----------------------------------------------------------------------- + | + |// Handler for callback functions. Callback slot number in r11, g in r12. + |->vm_ffi_callback: + |.if FFI + |.type CTSTATE, CTState, PC + | saveregs + | lwz CTSTATE, GL:r12->ctype_state + | addi DISPATCH, r12, GG_G2DISP + | stw r11, CTSTATE->cb.slot + | stw r3, CTSTATE->cb.gpr[0] + | stfd f1, CTSTATE->cb.fpr[0] + | stw r4, CTSTATE->cb.gpr[1] + | stfd f2, CTSTATE->cb.fpr[1] + | stw r5, CTSTATE->cb.gpr[2] + | stfd f3, CTSTATE->cb.fpr[2] + | stw r6, CTSTATE->cb.gpr[3] + | stfd f4, CTSTATE->cb.fpr[3] + | stw r7, CTSTATE->cb.gpr[4] + | stfd f5, CTSTATE->cb.fpr[4] + | stw r8, CTSTATE->cb.gpr[5] + | stfd f6, CTSTATE->cb.fpr[5] + | stw r9, CTSTATE->cb.gpr[6] + | stfd f7, CTSTATE->cb.fpr[6] + | stw r10, CTSTATE->cb.gpr[7] + | stfd f8, CTSTATE->cb.fpr[7] + | addi TMP0, sp, CFRAME_SPACE+8 + | stw TMP0, CTSTATE->cb.stack + | mr CARG1, CTSTATE + | stw CTSTATE, SAVE_PC // Any value outside of bytecode is ok. + | mr CARG2, sp + | bl extern lj_ccallback_enter // (CTState *cts, void *cf) + | // Returns lua_State *. + | lp BASE, L:CRET1->base + | li TISNUM, LJ_TISNUM // Setup type comparison constants. + | lp RC, L:CRET1->top + | lus TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float). + | li ZERO, 0 + | mr L, CRET1 + | stw TMP3, TMPD + | lus TMP0, 0x4338 // Hiword of 2^52 + 2^51 (double) + | lwz LFUNC:RB, FRAME_FUNC(BASE) + | ori TMP3, TMP3, 0x0004 // TONUM = 2^52 + 2^51 + 2^31 (float). + | stw TMP0, TONUM_HI + | li TISNIL, LJ_TNIL + | li_vmstate INTERP + | lfs TOBIT, TMPD + | stw TMP3, TMPD + | sub RC, RC, BASE + | st_vmstate + | lfs TONUM, TMPD + | ins_callt + |.endif + | + |->cont_ffi_callback: // Return from FFI callback. + |.if FFI + | lwz CTSTATE, DISPATCH_GL(ctype_state)(DISPATCH) + | stp BASE, L->base + | stp RB, L->top + | stp L, CTSTATE->L + | mr CARG1, CTSTATE + | mr CARG2, RA + | bl extern lj_ccallback_leave // (CTState *cts, TValue *o) + | lwz CRET1, CTSTATE->cb.gpr[0] + | lfd FARG1, CTSTATE->cb.fpr[0] + | lwz CRET2, CTSTATE->cb.gpr[1] + | b ->vm_leave_unw + |.endif + | + |->vm_ffi_call: // Call C function via FFI. + | // Caveat: needs special frame unwinding, see below. + |.if FFI + | .type CCSTATE, CCallState, CARG1 + | lwz TMP1, CCSTATE->spadj + | mflr TMP0 + | lbz CARG2, CCSTATE->nsp + | lbz CARG3, CCSTATE->nfpr + | neg TMP1, TMP1 + | stw TMP0, 4(sp) + | cmpwi cr1, CARG3, 0 + | mr TMP2, sp + | addic. CARG2, CARG2, -1 + | stwux sp, sp, TMP1 + | crnot 4*cr1+eq, 4*cr1+eq // For vararg calls. + | stw r14, -4(TMP2) + | stw CCSTATE, -8(TMP2) + | mr r14, TMP2 + | la TMP1, CCSTATE->stack + | slwi CARG2, CARG2, 2 + | blty >2 + | la TMP2, 8(sp) + |1: + | lwzx TMP0, TMP1, CARG2 + | stwx TMP0, TMP2, CARG2 + | addic. CARG2, CARG2, -4 + | bge <1 + |2: + | bney cr1, >3 + | lfd f1, CCSTATE->fpr[0] + | lfd f2, CCSTATE->fpr[1] + | lfd f3, CCSTATE->fpr[2] + | lfd f4, CCSTATE->fpr[3] + | lfd f5, CCSTATE->fpr[4] + | lfd f6, CCSTATE->fpr[5] + | lfd f7, CCSTATE->fpr[6] + | lfd f8, CCSTATE->fpr[7] + |3: + | lp TMP0, CCSTATE->func + | lwz CARG2, CCSTATE->gpr[1] + | lwz CARG3, CCSTATE->gpr[2] + | lwz CARG4, CCSTATE->gpr[3] + | lwz CARG5, CCSTATE->gpr[4] + | mtctr TMP0 + | lwz r8, CCSTATE->gpr[5] + | lwz r9, CCSTATE->gpr[6] + | lwz r10, CCSTATE->gpr[7] + | lwz CARG1, CCSTATE->gpr[0] // Do this last, since CCSTATE is CARG1. + | bctrl + | lwz CCSTATE:TMP1, -8(r14) + | lwz TMP2, -4(r14) + | lwz TMP0, 4(r14) + | stw CARG1, CCSTATE:TMP1->gpr[0] + | stfd FARG1, CCSTATE:TMP1->fpr[0] + | stw CARG2, CCSTATE:TMP1->gpr[1] + | mtlr TMP0 + | stw CARG3, CCSTATE:TMP1->gpr[2] + | mr sp, r14 + | stw CARG4, CCSTATE:TMP1->gpr[3] + | mr r14, TMP2 + | blr + |.endif + |// Note: vm_ffi_call must be the last function in this object file! + | + |//----------------------------------------------------------------------- +} + +/* Generate the code for a single instruction. */ +static void build_ins(BuildCtx *ctx, BCOp op, int defop) +{ + int vk = 0; + |=>defop: + + switch (op) { + + /* -- Comparison ops ---------------------------------------------------- */ + + /* Remember: all ops branch for a true comparison, fall through otherwise. */ + + case BC_ISLT: case BC_ISGE: case BC_ISLE: case BC_ISGT: + | // RA = src1*8, RD = src2*8, JMP with RD = target + |.if DUALNUM + | lwzux TMP0, RA, BASE + | addi PC, PC, 4 + | lwz CARG2, 4(RA) + | lwzux TMP1, RD, BASE + | lwz TMP2, -4(PC) + | checknum cr0, TMP0 + | lwz CARG3, 4(RD) + | decode_RD4 TMP2, TMP2 + | checknum cr1, TMP1 + | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16) + | bne cr0, >7 + | bne cr1, >8 + | cmpw CARG2, CARG3 + if (op == BC_ISLT) { + | bge >2 + } else if (op == BC_ISGE) { + | blt >2 + } else if (op == BC_ISLE) { + | bgt >2 + } else { + | ble >2 + } + |1: + | add PC, PC, TMP2 + |2: + | ins_next + | + |7: // RA is not an integer. + | bgt cr0, ->vmeta_comp + | // RA is a number. + | lfd f0, 0(RA) + | bgt cr1, ->vmeta_comp + | blt cr1, >4 + | // RA is a number, RD is an integer. + | tonum_i f1, CARG3 + | b >5 + | + |8: // RA is an integer, RD is not an integer. + | bgt cr1, ->vmeta_comp + | // RA is an integer, RD is a number. + | tonum_i f0, CARG2 + |4: + | lfd f1, 0(RD) + |5: + | fcmpu cr0, f0, f1 + if (op == BC_ISLT) { + | bge <2 + } else if (op == BC_ISGE) { + | blt <2 + } else if (op == BC_ISLE) { + | cror 4*cr0+lt, 4*cr0+lt, 4*cr0+eq + | bge <2 + } else { + | cror 4*cr0+lt, 4*cr0+lt, 4*cr0+eq + | blt <2 + } + | b <1 + |.else + | lwzx TMP0, BASE, RA + | addi PC, PC, 4 + | lfdx f0, BASE, RA + | lwzx TMP1, BASE, RD + | checknum cr0, TMP0 + | lwz TMP2, -4(PC) + | lfdx f1, BASE, RD + | checknum cr1, TMP1 + | decode_RD4 TMP2, TMP2 + | bge cr0, ->vmeta_comp + | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16) + | bge cr1, ->vmeta_comp + | fcmpu cr0, f0, f1 + if (op == BC_ISLT) { + | bge >1 + } else if (op == BC_ISGE) { + | blt >1 + } else if (op == BC_ISLE) { + | cror 4*cr0+lt, 4*cr0+lt, 4*cr0+eq + | bge >1 + } else { + | cror 4*cr0+lt, 4*cr0+lt, 4*cr0+eq + | blt >1 + } + | add PC, PC, TMP2 + |1: + | ins_next + |.endif + break; + + case BC_ISEQV: case BC_ISNEV: + vk = op == BC_ISEQV; + | // RA = src1*8, RD = src2*8, JMP with RD = target + |.if DUALNUM + | lwzux TMP0, RA, BASE + | addi PC, PC, 4 + | lwz CARG2, 4(RA) + | lwzux TMP1, RD, BASE + | checknum cr0, TMP0 + | lwz TMP2, -4(PC) + | checknum cr1, TMP1 + | decode_RD4 TMP2, TMP2 + | lwz CARG3, 4(RD) + | cror 4*cr7+gt, 4*cr0+gt, 4*cr1+gt + | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16) + if (vk) { + | ble cr7, ->BC_ISEQN_Z + } else { + | ble cr7, ->BC_ISNEN_Z + } + |.else + | lwzux TMP0, RA, BASE + | lwz TMP2, 0(PC) + | lfd f0, 0(RA) + | addi PC, PC, 4 + | lwzux TMP1, RD, BASE + | checknum cr0, TMP0 + | decode_RD4 TMP2, TMP2 + | lfd f1, 0(RD) + | checknum cr1, TMP1 + | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16) + | bge cr0, >5 + | bge cr1, >5 + | fcmpu cr0, f0, f1 + if (vk) { + | bne >1 + | add PC, PC, TMP2 + } else { + | beq >1 + | add PC, PC, TMP2 + } + |1: + | ins_next + |.endif + |5: // Either or both types are not numbers. + |.if not DUALNUM + | lwz CARG2, 4(RA) + | lwz CARG3, 4(RD) + |.endif + |.if FFI + | cmpwi cr7, TMP0, LJ_TCDATA + | cmpwi cr5, TMP1, LJ_TCDATA + |.endif + | not TMP3, TMP0 + | cmplw TMP0, TMP1 + | cmplwi cr1, TMP3, ~LJ_TISPRI // Primitive? + |.if FFI + | cror 4*cr7+eq, 4*cr7+eq, 4*cr5+eq + |.endif + | cmplwi cr6, TMP3, ~LJ_TISTABUD // Table or userdata? + |.if FFI + | beq cr7, ->vmeta_equal_cd + |.endif + | cmplw cr5, CARG2, CARG3 + | crandc 4*cr0+gt, 4*cr0+eq, 4*cr1+gt // 2: Same type and primitive. + | crorc 4*cr0+lt, 4*cr5+eq, 4*cr0+eq // 1: Same tv or different type. + | crand 4*cr0+eq, 4*cr0+eq, 4*cr5+eq // 0: Same type and same tv. + | mr SAVE0, PC + | cror 4*cr0+eq, 4*cr0+eq, 4*cr0+gt // 0 or 2. + | cror 4*cr0+lt, 4*cr0+lt, 4*cr0+gt // 1 or 2. + if (vk) { + | bne cr0, >6 + | add PC, PC, TMP2 + |6: + } else { + | beq cr0, >6 + | add PC, PC, TMP2 + |6: + } + |.if DUALNUM + | bge cr0, >2 // Done if 1 or 2. + |1: + | ins_next + |2: + |.else + | blt cr0, <1 // Done if 1 or 2. + |.endif + | blt cr6, <1 // Done if not tab/ud. + | + | // Different tables or userdatas. Need to check __eq metamethod. + | // Field metatable must be at same offset for GCtab and GCudata! + | lwz TAB:TMP2, TAB:CARG2->metatable + | li CARG4, 1-vk // ne = 0 or 1. + | cmplwi TAB:TMP2, 0 + | beq <1 // No metatable? + | lbz TMP2, TAB:TMP2->nomm + | andix. TMP2, TMP2, 1<<MM_eq + | bne <1 // Or 'no __eq' flag set? + | mr PC, SAVE0 // Restore old PC. + | b ->vmeta_equal // Handle __eq metamethod. + break; + + case BC_ISEQS: case BC_ISNES: + vk = op == BC_ISEQS; + | // RA = src*8, RD = str_const*8 (~), JMP with RD = target + | lwzux TMP0, RA, BASE + | srwi RD, RD, 1 + | lwz STR:TMP3, 4(RA) + | lwz TMP2, 0(PC) + | subfic RD, RD, -4 + | addi PC, PC, 4 + |.if FFI + | cmpwi TMP0, LJ_TCDATA + |.endif + | lwzx STR:TMP1, KBASE, RD // KBASE-4-str_const*4 + | .gpr64 extsw TMP0, TMP0 + | subfic TMP0, TMP0, LJ_TSTR + |.if FFI + | beq ->vmeta_equal_cd + |.endif + | sub TMP1, STR:TMP1, STR:TMP3 + | or TMP0, TMP0, TMP1 + | decode_RD4 TMP2, TMP2 + | subfic TMP0, TMP0, 0 + | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16) + | subfe TMP1, TMP1, TMP1 + if (vk) { + | andc TMP2, TMP2, TMP1 + } else { + | and TMP2, TMP2, TMP1 + } + | add PC, PC, TMP2 + | ins_next + break; + + case BC_ISEQN: case BC_ISNEN: + vk = op == BC_ISEQN; + | // RA = src*8, RD = num_const*8, JMP with RD = target + |.if DUALNUM + | lwzux TMP0, RA, BASE + | addi PC, PC, 4 + | lwz CARG2, 4(RA) + | lwzux TMP1, RD, KBASE + | checknum cr0, TMP0 + | lwz TMP2, -4(PC) + | checknum cr1, TMP1 + | decode_RD4 TMP2, TMP2 + | lwz CARG3, 4(RD) + | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16) + if (vk) { + |->BC_ISEQN_Z: + } else { + |->BC_ISNEN_Z: + } + | bne cr0, >7 + | bne cr1, >8 + | cmpw CARG2, CARG3 + |4: + |.else + if (vk) { + |->BC_ISEQN_Z: // Dummy label. + } else { + |->BC_ISNEN_Z: // Dummy label. + } + | lwzx TMP0, BASE, RA + | addi PC, PC, 4 + | lfdx f0, BASE, RA + | lwz TMP2, -4(PC) + | lfdx f1, KBASE, RD + | decode_RD4 TMP2, TMP2 + | checknum TMP0 + | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16) + | bge >3 + | fcmpu cr0, f0, f1 + |.endif + if (vk) { + | bne >1 + | add PC, PC, TMP2 + |1: + |.if not FFI + |3: + |.endif + } else { + | beq >2 + |1: + |.if not FFI + |3: + |.endif + | add PC, PC, TMP2 + |2: + } + | ins_next + |.if FFI + |3: + | cmpwi TMP0, LJ_TCDATA + | beq ->vmeta_equal_cd + | b <1 + |.endif + |.if DUALNUM + |7: // RA is not an integer. + | bge cr0, <3 + | // RA is a number. + | lfd f0, 0(RA) + | blt cr1, >1 + | // RA is a number, RD is an integer. + | tonum_i f1, CARG3 + | b >2 + | + |8: // RA is an integer, RD is a number. + | tonum_i f0, CARG2 + |1: + | lfd f1, 0(RD) + |2: + | fcmpu cr0, f0, f1 + | b <4 + |.endif + break; + + case BC_ISEQP: case BC_ISNEP: + vk = op == BC_ISEQP; + | // RA = src*8, RD = primitive_type*8 (~), JMP with RD = target + | lwzx TMP0, BASE, RA + | srwi TMP1, RD, 3 + | lwz TMP2, 0(PC) + | not TMP1, TMP1 + | addi PC, PC, 4 + |.if FFI + | cmpwi TMP0, LJ_TCDATA + |.endif + | sub TMP0, TMP0, TMP1 + |.if FFI + | beq ->vmeta_equal_cd + |.endif + | decode_RD4 TMP2, TMP2 + | .gpr64 extsw TMP0, TMP0 + | addic TMP0, TMP0, -1 + | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16) + | subfe TMP1, TMP1, TMP1 + if (vk) { + | and TMP2, TMP2, TMP1 + } else { + | andc TMP2, TMP2, TMP1 + } + | add PC, PC, TMP2 + | ins_next + break; + + /* -- Unary test and copy ops ------------------------------------------- */ + + case BC_ISTC: case BC_ISFC: case BC_IST: case BC_ISF: + | // RA = dst*8 or unused, RD = src*8, JMP with RD = target + | lwzx TMP0, BASE, RD + | lwz INS, 0(PC) + | addi PC, PC, 4 + if (op == BC_IST || op == BC_ISF) { + | .gpr64 extsw TMP0, TMP0 + | subfic TMP0, TMP0, LJ_TTRUE + | decode_RD4 TMP2, INS + | subfe TMP1, TMP1, TMP1 + | addis TMP2, TMP2, -(BCBIAS_J*4 >> 16) + if (op == BC_IST) { + | andc TMP2, TMP2, TMP1 + } else { + | and TMP2, TMP2, TMP1 + } + | add PC, PC, TMP2 + } else { + | li TMP1, LJ_TFALSE + | lfdx f0, BASE, RD + | cmplw TMP0, TMP1 + if (op == BC_ISTC) { + | bge >1 + } else { + | blt >1 + } + | addis PC, PC, -(BCBIAS_J*4 >> 16) + | decode_RD4 TMP2, INS + | stfdx f0, BASE, RA + | add PC, PC, TMP2 + |1: + } + | ins_next + break; + + case BC_ISTYPE: + | // RA = src*8, RD = -type*8 + | lwzx TMP0, BASE, RA + | srwi TMP1, RD, 3 + | ins_next1 + |.if not PPE and not GPR64 + | add. TMP0, TMP0, TMP1 + |.else + | neg TMP1, TMP1 + | cmpw TMP0, TMP1 + |.endif + | bne ->vmeta_istype + | ins_next2 + break; + case BC_ISNUM: + | // RA = src*8, RD = -(TISNUM-1)*8 + | lwzx TMP0, BASE, RA + | ins_next1 + | checknum TMP0 + | bge ->vmeta_istype + | ins_next2 + break; + + /* -- Unary ops --------------------------------------------------------- */ + + case BC_MOV: + | // RA = dst*8, RD = src*8 + | ins_next1 + | lfdx f0, BASE, RD + | stfdx f0, BASE, RA + | ins_next2 + break; + case BC_NOT: + | // RA = dst*8, RD = src*8 + | ins_next1 + | lwzx TMP0, BASE, RD + | .gpr64 extsw TMP0, TMP0 + | subfic TMP1, TMP0, LJ_TTRUE + | adde TMP0, TMP0, TMP1 + | stwx TMP0, BASE, RA + | ins_next2 + break; + case BC_UNM: + | // RA = dst*8, RD = src*8 + | lwzux TMP1, RD, BASE + | lwz TMP0, 4(RD) + | checknum TMP1 + |.if DUALNUM + | bne >5 + |.if GPR64 + | lus TMP2, 0x8000 + | neg TMP0, TMP0 + | cmplw TMP0, TMP2 + | beq >4 + |.else + | nego. TMP0, TMP0 + | bso >4 + |1: + |.endif + | ins_next1 + | stwux TISNUM, RA, BASE + | stw TMP0, 4(RA) + |3: + | ins_next2 + |4: + |.if not GPR64 + | // Potential overflow. + | checkov TMP1, <1 // Ignore unrelated overflow. + |.endif + | lus TMP1, 0x41e0 // 2^31. + | li TMP0, 0 + | b >7 + |.endif + |5: + | bge ->vmeta_unm + | xoris TMP1, TMP1, 0x8000 + |7: + | ins_next1 + | stwux TMP1, RA, BASE + | stw TMP0, 4(RA) + |.if DUALNUM + | b <3 + |.else + | ins_next2 + |.endif + break; + case BC_LEN: + | // RA = dst*8, RD = src*8 + | lwzux TMP0, RD, BASE + | lwz CARG1, 4(RD) + | checkstr TMP0; bne >2 + | lwz CRET1, STR:CARG1->len + |1: + |.if DUALNUM + | ins_next1 + | stwux TISNUM, RA, BASE + | stw CRET1, 4(RA) + |.else + | tonum_u f0, CRET1 // Result is a non-negative integer. + | ins_next1 + | stfdx f0, BASE, RA + |.endif + | ins_next2 + |2: + | checktab TMP0; bne ->vmeta_len +#if LJ_52 + | lwz TAB:TMP2, TAB:CARG1->metatable + | cmplwi TAB:TMP2, 0 + | bne >9 + |3: +#endif + |->BC_LEN_Z: + | bl extern lj_tab_len // (GCtab *t) + | // Returns uint32_t (but less than 2^31). + | b <1 +#if LJ_52 + |9: + | lbz TMP0, TAB:TMP2->nomm + | andix. TMP0, TMP0, 1<<MM_len + | bne <3 // 'no __len' flag set: done. + | b ->vmeta_len +#endif + break; + + /* -- Binary ops -------------------------------------------------------- */ + + |.macro ins_arithpre + | // RA = dst*8, RB = src1*8, RC = src2*8 | num_const*8 + ||vk = ((int)op - BC_ADDVN) / (BC_ADDNV-BC_ADDVN); + ||switch (vk) { + ||case 0: + | lwzx TMP1, BASE, RB + | .if DUALNUM + | lwzx TMP2, KBASE, RC + | .endif + | lfdx f14, BASE, RB + | lfdx f15, KBASE, RC + | .if DUALNUM + | checknum cr0, TMP1 + | checknum cr1, TMP2 + | crand 4*cr0+lt, 4*cr0+lt, 4*cr1+lt + | bge ->vmeta_arith_vn + | .else + | checknum TMP1; bge ->vmeta_arith_vn + | .endif + || break; + ||case 1: + | lwzx TMP1, BASE, RB + | .if DUALNUM + | lwzx TMP2, KBASE, RC + | .endif + | lfdx f15, BASE, RB + | lfdx f14, KBASE, RC + | .if DUALNUM + | checknum cr0, TMP1 + | checknum cr1, TMP2 + | crand 4*cr0+lt, 4*cr0+lt, 4*cr1+lt + | bge ->vmeta_arith_nv + | .else + | checknum TMP1; bge ->vmeta_arith_nv + | .endif + || break; + ||default: + | lwzx TMP1, BASE, RB + | lwzx TMP2, BASE, RC + | lfdx f14, BASE, RB + | lfdx f15, BASE, RC + | checknum cr0, TMP1 + | checknum cr1, TMP2 + | crand 4*cr0+lt, 4*cr0+lt, 4*cr1+lt + | bge ->vmeta_arith_vv + || break; + ||} + |.endmacro + | + |.macro ins_arithfallback, ins + ||switch (vk) { + ||case 0: + | ins ->vmeta_arith_vn2 + || break; + ||case 1: + | ins ->vmeta_arith_nv2 + || break; + ||default: + | ins ->vmeta_arith_vv2 + || break; + ||} + |.endmacro + | + |.macro intmod, a, b, c + | bl ->vm_modi + |.endmacro + | + |.macro fpmod, a, b, c + |->BC_MODVN_Z: + | fdiv FARG1, b, c + | // NYI: Use internal implementation of floor. + | blex floor // floor(b/c) + | fmul a, FARG1, c + | fsub a, b, a // b - floor(b/c)*c + |.endmacro + | + |.macro ins_arithfp, fpins + | ins_arithpre + |.if "fpins" == "fpmod_" + | b ->BC_MODVN_Z // Avoid 3 copies. It's slow anyway. + |.else + | fpins f0, f14, f15 + | ins_next1 + | stfdx f0, BASE, RA + | ins_next2 + |.endif + |.endmacro + | + |.macro ins_arithdn, intins, fpins + | // RA = dst*8, RB = src1*8, RC = src2*8 | num_const*8 + ||vk = ((int)op - BC_ADDVN) / (BC_ADDNV-BC_ADDVN); + ||switch (vk) { + ||case 0: + | lwzux TMP1, RB, BASE + | lwzux TMP2, RC, KBASE + | lwz CARG1, 4(RB) + | checknum cr0, TMP1 + | lwz CARG2, 4(RC) + || break; + ||case 1: + | lwzux TMP1, RB, BASE + | lwzux TMP2, RC, KBASE + | lwz CARG2, 4(RB) + | checknum cr0, TMP1 + | lwz CARG1, 4(RC) + || break; + ||default: + | lwzux TMP1, RB, BASE + | lwzux TMP2, RC, BASE + | lwz CARG1, 4(RB) + | checknum cr0, TMP1 + | lwz CARG2, 4(RC) + || break; + ||} + | checknum cr1, TMP2 + | bne >5 + | bne cr1, >5 + | intins CARG1, CARG1, CARG2 + | bso >4 + |1: + | ins_next1 + | stwux TISNUM, RA, BASE + | stw CARG1, 4(RA) + |2: + | ins_next2 + |4: // Overflow. + | checkov TMP0, <1 // Ignore unrelated overflow. + | ins_arithfallback b + |5: // FP variant. + ||if (vk == 1) { + | lfd f15, 0(RB) + | crand 4*cr0+lt, 4*cr0+lt, 4*cr1+lt + | lfd f14, 0(RC) + ||} else { + | lfd f14, 0(RB) + | crand 4*cr0+lt, 4*cr0+lt, 4*cr1+lt + | lfd f15, 0(RC) + ||} + | ins_arithfallback bge + |.if "fpins" == "fpmod_" + | b ->BC_MODVN_Z // Avoid 3 copies. It's slow anyway. + |.else + | fpins f0, f14, f15 + | ins_next1 + | stfdx f0, BASE, RA + | b <2 + |.endif + |.endmacro + | + |.macro ins_arith, intins, fpins + |.if DUALNUM + | ins_arithdn intins, fpins + |.else + | ins_arithfp fpins + |.endif + |.endmacro + + case BC_ADDVN: case BC_ADDNV: case BC_ADDVV: + |.if GPR64 + |.macro addo32., y, a, b + | // Need to check overflow for (a<<32) + (b<<32). + | rldicr TMP0, a, 32, 31 + | rldicr TMP3, b, 32, 31 + | addo. TMP0, TMP0, TMP3 + | add y, a, b + |.endmacro + | ins_arith addo32., fadd + |.else + | ins_arith addo., fadd + |.endif + break; + case BC_SUBVN: case BC_SUBNV: case BC_SUBVV: + |.if GPR64 + |.macro subo32., y, a, b + | // Need to check overflow for (a<<32) - (b<<32). + | rldicr TMP0, a, 32, 31 + | rldicr TMP3, b, 32, 31 + | subo. TMP0, TMP0, TMP3 + | sub y, a, b + |.endmacro + | ins_arith subo32., fsub + |.else + | ins_arith subo., fsub + |.endif + break; + case BC_MULVN: case BC_MULNV: case BC_MULVV: + | ins_arith mullwo., fmul + break; + case BC_DIVVN: case BC_DIVNV: case BC_DIVVV: + | ins_arithfp fdiv + break; + case BC_MODVN: + | ins_arith intmod, fpmod + break; + case BC_MODNV: case BC_MODVV: + | ins_arith intmod, fpmod_ + break; + case BC_POW: + | // NYI: (partial) integer arithmetic. + | lwzx TMP1, BASE, RB + | lfdx FARG1, BASE, RB + | lwzx TMP2, BASE, RC + | lfdx FARG2, BASE, RC + | checknum cr0, TMP1 + | checknum cr1, TMP2 + | crand 4*cr0+lt, 4*cr0+lt, 4*cr1+lt + | bge ->vmeta_arith_vv + | blex pow + | ins_next1 + | stfdx FARG1, BASE, RA + | ins_next2 + break; + + case BC_CAT: + | // RA = dst*8, RB = src_start*8, RC = src_end*8 + | sub CARG3, RC, RB + | stp BASE, L->base + | add CARG2, BASE, RC + | mr SAVE0, RB + |->BC_CAT_Z: + | stw PC, SAVE_PC + | mr CARG1, L + | srwi CARG3, CARG3, 3 + | bl extern lj_meta_cat // (lua_State *L, TValue *top, int left) + | // Returns NULL (finished) or TValue * (metamethod). + | cmplwi CRET1, 0 + | lp BASE, L->base + | bne ->vmeta_binop + | ins_next1 + | lfdx f0, BASE, SAVE0 // Copy result from RB to RA. + | stfdx f0, BASE, RA + | ins_next2 + break; + + /* -- Constant ops ------------------------------------------------------ */ + + case BC_KSTR: + | // RA = dst*8, RD = str_const*8 (~) + | srwi TMP1, RD, 1 + | subfic TMP1, TMP1, -4 + | ins_next1 + | lwzx TMP0, KBASE, TMP1 // KBASE-4-str_const*4 + | li TMP2, LJ_TSTR + | stwux TMP2, RA, BASE + | stw TMP0, 4(RA) + | ins_next2 + break; + case BC_KCDATA: + |.if FFI + | // RA = dst*8, RD = cdata_const*8 (~) + | srwi TMP1, RD, 1 + | subfic TMP1, TMP1, -4 + | ins_next1 + | lwzx TMP0, KBASE, TMP1 // KBASE-4-cdata_const*4 + | li TMP2, LJ_TCDATA + | stwux TMP2, RA, BASE + | stw TMP0, 4(RA) + | ins_next2 + |.endif + break; + case BC_KSHORT: + | // RA = dst*8, RD = int16_literal*8 + |.if DUALNUM + | slwi RD, RD, 13 + | srawi RD, RD, 16 + | ins_next1 + | stwux TISNUM, RA, BASE + | stw RD, 4(RA) + | ins_next2 + |.else + | // The soft-float approach is faster. + | slwi RD, RD, 13 + | srawi TMP1, RD, 31 + | xor TMP2, TMP1, RD + | sub TMP2, TMP2, TMP1 // TMP2 = abs(x) + | cntlzw TMP3, TMP2 + | subfic TMP1, TMP3, 0x40d // TMP1 = exponent-1 + | slw TMP2, TMP2, TMP3 // TMP2 = left aligned mantissa + | subfic TMP3, RD, 0 + | slwi TMP1, TMP1, 20 + | rlwimi RD, TMP2, 21, 1, 31 // hi = sign(x) | (mantissa>>11) + | subfe TMP0, TMP0, TMP0 + | add RD, RD, TMP1 // hi = hi + exponent-1 + | and RD, RD, TMP0 // hi = x == 0 ? 0 : hi + | ins_next1 + | stwux RD, RA, BASE + | stw ZERO, 4(RA) + | ins_next2 + |.endif + break; + case BC_KNUM: + | // RA = dst*8, RD = num_const*8 + | ins_next1 + | lfdx f0, KBASE, RD + | stfdx f0, BASE, RA + | ins_next2 + break; + case BC_KPRI: + | // RA = dst*8, RD = primitive_type*8 (~) + | srwi TMP1, RD, 3 + | not TMP0, TMP1 + | ins_next1 + | stwx TMP0, BASE, RA + | ins_next2 + break; + case BC_KNIL: + | // RA = base*8, RD = end*8 + | stwx TISNIL, BASE, RA + | addi RA, RA, 8 + |1: + | stwx TISNIL, BASE, RA + | cmpw RA, RD + | addi RA, RA, 8 + | blt <1 + | ins_next_ + break; + + /* -- Upvalue and function ops ------------------------------------------ */ + + case BC_UGET: + | // RA = dst*8, RD = uvnum*8 + | lwz LFUNC:RB, FRAME_FUNC(BASE) + | srwi RD, RD, 1 + | addi RD, RD, offsetof(GCfuncL, uvptr) + | lwzx UPVAL:RB, LFUNC:RB, RD + | ins_next1 + | lwz TMP1, UPVAL:RB->v + | lfd f0, 0(TMP1) + | stfdx f0, BASE, RA + | ins_next2 + break; + case BC_USETV: + | // RA = uvnum*8, RD = src*8 + | lwz LFUNC:RB, FRAME_FUNC(BASE) + | srwi RA, RA, 1 + | addi RA, RA, offsetof(GCfuncL, uvptr) + | lfdux f0, RD, BASE + | lwzx UPVAL:RB, LFUNC:RB, RA + | lbz TMP3, UPVAL:RB->marked + | lwz CARG2, UPVAL:RB->v + | andix. TMP3, TMP3, LJ_GC_BLACK // isblack(uv) + | lbz TMP0, UPVAL:RB->closed + | lwz TMP2, 0(RD) + | stfd f0, 0(CARG2) + | cmplwi cr1, TMP0, 0 + | lwz TMP1, 4(RD) + | cror 4*cr0+eq, 4*cr0+eq, 4*cr1+eq + | subi TMP2, TMP2, (LJ_TNUMX+1) + | bne >2 // Upvalue is closed and black? + |1: + | ins_next + | + |2: // Check if new value is collectable. + | cmplwi TMP2, LJ_TISGCV - (LJ_TNUMX+1) + | bge <1 // tvisgcv(v) + | lbz TMP3, GCOBJ:TMP1->gch.marked + | andix. TMP3, TMP3, LJ_GC_WHITES // iswhite(v) + | la CARG1, GG_DISP2G(DISPATCH) + | // Crossed a write barrier. Move the barrier forward. + | beq <1 + | bl extern lj_gc_barrieruv // (global_State *g, TValue *tv) + | b <1 + break; + case BC_USETS: + | // RA = uvnum*8, RD = str_const*8 (~) + | lwz LFUNC:RB, FRAME_FUNC(BASE) + | srwi TMP1, RD, 1 + | srwi RA, RA, 1 + | subfic TMP1, TMP1, -4 + | addi RA, RA, offsetof(GCfuncL, uvptr) + | lwzx STR:TMP1, KBASE, TMP1 // KBASE-4-str_const*4 + | lwzx UPVAL:RB, LFUNC:RB, RA + | lbz TMP3, UPVAL:RB->marked + | lwz CARG2, UPVAL:RB->v + | andix. TMP3, TMP3, LJ_GC_BLACK // isblack(uv) + | lbz TMP3, STR:TMP1->marked + | lbz TMP2, UPVAL:RB->closed + | li TMP0, LJ_TSTR + | stw STR:TMP1, 4(CARG2) + | stw TMP0, 0(CARG2) + | bne >2 + |1: + | ins_next + | + |2: // Check if string is white and ensure upvalue is closed. + | andix. TMP3, TMP3, LJ_GC_WHITES // iswhite(str) + | cmplwi cr1, TMP2, 0 + | cror 4*cr0+eq, 4*cr0+eq, 4*cr1+eq + | la CARG1, GG_DISP2G(DISPATCH) + | // Crossed a write barrier. Move the barrier forward. + | beq <1 + | bl extern lj_gc_barrieruv // (global_State *g, TValue *tv) + | b <1 + break; + case BC_USETN: + | // RA = uvnum*8, RD = num_const*8 + | lwz LFUNC:RB, FRAME_FUNC(BASE) + | srwi RA, RA, 1 + | addi RA, RA, offsetof(GCfuncL, uvptr) + | lfdx f0, KBASE, RD + | lwzx UPVAL:RB, LFUNC:RB, RA + | ins_next1 + | lwz TMP1, UPVAL:RB->v + | stfd f0, 0(TMP1) + | ins_next2 + break; + case BC_USETP: + | // RA = uvnum*8, RD = primitive_type*8 (~) + | lwz LFUNC:RB, FRAME_FUNC(BASE) + | srwi RA, RA, 1 + | srwi TMP0, RD, 3 + | addi RA, RA, offsetof(GCfuncL, uvptr) + | not TMP0, TMP0 + | lwzx UPVAL:RB, LFUNC:RB, RA + | ins_next1 + | lwz TMP1, UPVAL:RB->v + | stw TMP0, 0(TMP1) + | ins_next2 + break; + + case BC_UCLO: + | // RA = level*8, RD = target + | lwz TMP1, L->openupval + | branch_RD // Do this first since RD is not saved. + | stp BASE, L->base + | cmplwi TMP1, 0 + | mr CARG1, L + | beq >1 + | add CARG2, BASE, RA + | bl extern lj_func_closeuv // (lua_State *L, TValue *level) + | lp BASE, L->base + |1: + | ins_next + break; + + case BC_FNEW: + | // RA = dst*8, RD = proto_const*8 (~) (holding function prototype) + | srwi TMP1, RD, 1 + | stp BASE, L->base + | subfic TMP1, TMP1, -4 + | stw PC, SAVE_PC + | lwzx CARG2, KBASE, TMP1 // KBASE-4-tab_const*4 + | mr CARG1, L + | lwz CARG3, FRAME_FUNC(BASE) + | // (lua_State *L, GCproto *pt, GCfuncL *parent) + | bl extern lj_func_newL_gc + | // Returns GCfuncL *. + | lp BASE, L->base + | li TMP0, LJ_TFUNC + | stwux TMP0, RA, BASE + | stw LFUNC:CRET1, 4(RA) + | ins_next + break; + + /* -- Table ops --------------------------------------------------------- */ + + case BC_TNEW: + case BC_TDUP: + | // RA = dst*8, RD = (hbits|asize)*8 | tab_const*8 (~) + | lwz TMP0, DISPATCH_GL(gc.total)(DISPATCH) + | mr CARG1, L + | lwz TMP1, DISPATCH_GL(gc.threshold)(DISPATCH) + | stp BASE, L->base + | cmplw TMP0, TMP1 + | stw PC, SAVE_PC + | bge >5 + |1: + if (op == BC_TNEW) { + | rlwinm CARG2, RD, 29, 21, 31 + | rlwinm CARG3, RD, 18, 27, 31 + | cmpwi CARG2, 0x7ff; beq >3 + |2: + | bl extern lj_tab_new // (lua_State *L, int32_t asize, uint32_t hbits) + | // Returns Table *. + } else { + | srwi TMP1, RD, 1 + | subfic TMP1, TMP1, -4 + | lwzx CARG2, KBASE, TMP1 // KBASE-4-tab_const*4 + | bl extern lj_tab_dup // (lua_State *L, Table *kt) + | // Returns Table *. + } + | lp BASE, L->base + | li TMP0, LJ_TTAB + | stwux TMP0, RA, BASE + | stw TAB:CRET1, 4(RA) + | ins_next + if (op == BC_TNEW) { + |3: + | li CARG2, 0x801 + | b <2 + } + |5: + | mr SAVE0, RD + | bl extern lj_gc_step_fixtop // (lua_State *L) + | mr RD, SAVE0 + | mr CARG1, L + | b <1 + break; + + case BC_GGET: + | // RA = dst*8, RD = str_const*8 (~) + case BC_GSET: + | // RA = src*8, RD = str_const*8 (~) + | lwz LFUNC:TMP2, FRAME_FUNC(BASE) + | srwi TMP1, RD, 1 + | lwz TAB:RB, LFUNC:TMP2->env + | subfic TMP1, TMP1, -4 + | lwzx STR:RC, KBASE, TMP1 // KBASE-4-str_const*4 + if (op == BC_GGET) { + | b ->BC_TGETS_Z + } else { + | b ->BC_TSETS_Z + } + break; + + case BC_TGETV: + | // RA = dst*8, RB = table*8, RC = key*8 + | lwzux CARG1, RB, BASE + | lwzux CARG2, RC, BASE + | lwz TAB:RB, 4(RB) + |.if DUALNUM + | lwz RC, 4(RC) + |.else + | lfd f0, 0(RC) + |.endif + | checktab CARG1 + | checknum cr1, CARG2 + | bne ->vmeta_tgetv + |.if DUALNUM + | lwz TMP0, TAB:RB->asize + | bne cr1, >5 + | lwz TMP1, TAB:RB->array + | cmplw TMP0, RC + | slwi TMP2, RC, 3 + |.else + | bge cr1, >5 + | // Convert number key to integer, check for integerness and range. + | fctiwz f1, f0 + | fadd f2, f0, TOBIT + | stfd f1, TMPD + | lwz TMP0, TAB:RB->asize + | fsub f2, f2, TOBIT + | lwz TMP2, TMPD_LO + | lwz TMP1, TAB:RB->array + | fcmpu cr1, f0, f2 + | cmplw cr0, TMP0, TMP2 + | crand 4*cr0+gt, 4*cr0+gt, 4*cr1+eq + | slwi TMP2, TMP2, 3 + |.endif + | ble ->vmeta_tgetv // Integer key and in array part? + | lwzx TMP0, TMP1, TMP2 + | lfdx f14, TMP1, TMP2 + | checknil TMP0; beq >2 + |1: + | ins_next1 + | stfdx f14, BASE, RA + | ins_next2 + | + |2: // Check for __index if table value is nil. + | lwz TAB:TMP2, TAB:RB->metatable + | cmplwi TAB:TMP2, 0 + | beq <1 // No metatable: done. + | lbz TMP0, TAB:TMP2->nomm + | andix. TMP0, TMP0, 1<<MM_index + | bne <1 // 'no __index' flag set: done. + | b ->vmeta_tgetv + | + |5: + | checkstr CARG2; bne ->vmeta_tgetv + |.if not DUALNUM + | lwz STR:RC, 4(RC) + |.endif + | b ->BC_TGETS_Z // String key? + break; + case BC_TGETS: + | // RA = dst*8, RB = table*8, RC = str_const*8 (~) + | lwzux CARG1, RB, BASE + | srwi TMP1, RC, 1 + | lwz TAB:RB, 4(RB) + | subfic TMP1, TMP1, -4 + | checktab CARG1 + | lwzx STR:RC, KBASE, TMP1 // KBASE-4-str_const*4 + | bne ->vmeta_tgets1 + |->BC_TGETS_Z: + | // TAB:RB = GCtab *, STR:RC = GCstr *, RA = dst*8 + | lwz TMP0, TAB:RB->hmask + | lwz TMP1, STR:RC->hash + | lwz NODE:TMP2, TAB:RB->node + | and TMP1, TMP1, TMP0 // idx = str->hash & tab->hmask + | slwi TMP0, TMP1, 5 + | slwi TMP1, TMP1, 3 + | sub TMP1, TMP0, TMP1 + | add NODE:TMP2, NODE:TMP2, TMP1 // node = tab->node + (idx*32-idx*8) + |1: + | lwz CARG1, NODE:TMP2->key + | lwz TMP0, 4+offsetof(Node, key)(NODE:TMP2) + | lwz CARG2, NODE:TMP2->val + | lwz TMP1, 4+offsetof(Node, val)(NODE:TMP2) + | checkstr CARG1; bne >4 + | cmpw TMP0, STR:RC; bne >4 + | checknil CARG2; beq >5 // Key found, but nil value? + |3: + | stwux CARG2, RA, BASE + | stw TMP1, 4(RA) + | ins_next + | + |4: // Follow hash chain. + | lwz NODE:TMP2, NODE:TMP2->next + | cmplwi NODE:TMP2, 0 + | bne <1 + | // End of hash chain: key not found, nil result. + | li CARG2, LJ_TNIL + | + |5: // Check for __index if table value is nil. + | lwz TAB:TMP2, TAB:RB->metatable + | cmplwi TAB:TMP2, 0 + | beq <3 // No metatable: done. + | lbz TMP0, TAB:TMP2->nomm + | andix. TMP0, TMP0, 1<<MM_index + | bne <3 // 'no __index' flag set: done. + | b ->vmeta_tgets + break; + case BC_TGETB: + | // RA = dst*8, RB = table*8, RC = index*8 + | lwzux CARG1, RB, BASE + | srwi TMP0, RC, 3 + | lwz TAB:RB, 4(RB) + | checktab CARG1; bne ->vmeta_tgetb + | lwz TMP1, TAB:RB->asize + | lwz TMP2, TAB:RB->array + | cmplw TMP0, TMP1; bge ->vmeta_tgetb + | lwzx TMP1, TMP2, RC + | lfdx f0, TMP2, RC + | checknil TMP1; beq >5 + |1: + | ins_next1 + | stfdx f0, BASE, RA + | ins_next2 + | + |5: // Check for __index if table value is nil. + | lwz TAB:TMP2, TAB:RB->metatable + | cmplwi TAB:TMP2, 0 + | beq <1 // No metatable: done. + | lbz TMP2, TAB:TMP2->nomm + | andix. TMP2, TMP2, 1<<MM_index + | bne <1 // 'no __index' flag set: done. + | b ->vmeta_tgetb // Caveat: preserve TMP0! + break; + case BC_TGETR: + | // RA = dst*8, RB = table*8, RC = key*8 + | add RB, BASE, RB + | lwz TAB:CARG1, 4(RB) + |.if DUALNUM + | add RC, BASE, RC + | lwz TMP0, TAB:CARG1->asize + | lwz CARG2, 4(RC) + | lwz TMP1, TAB:CARG1->array + |.else + | lfdx f0, BASE, RC + | lwz TMP0, TAB:CARG1->asize + | toint CARG2, f0 + | lwz TMP1, TAB:CARG1->array + |.endif + | cmplw TMP0, CARG2 + | slwi TMP2, CARG2, 3 + | ble ->vmeta_tgetr // In array part? + | lfdx f14, TMP1, TMP2 + |->BC_TGETR_Z: + | ins_next1 + | stfdx f14, BASE, RA + | ins_next2 + break; + + case BC_TSETV: + | // RA = src*8, RB = table*8, RC = key*8 + | lwzux CARG1, RB, BASE + | lwzux CARG2, RC, BASE + | lwz TAB:RB, 4(RB) + |.if DUALNUM + | lwz RC, 4(RC) + |.else + | lfd f0, 0(RC) + |.endif + | checktab CARG1 + | checknum cr1, CARG2 + | bne ->vmeta_tsetv + |.if DUALNUM + | lwz TMP0, TAB:RB->asize + | bne cr1, >5 + | lwz TMP1, TAB:RB->array + | cmplw TMP0, RC + | slwi TMP0, RC, 3 + |.else + | bge cr1, >5 + | // Convert number key to integer, check for integerness and range. + | fctiwz f1, f0 + | fadd f2, f0, TOBIT + | stfd f1, TMPD + | lwz TMP0, TAB:RB->asize + | fsub f2, f2, TOBIT + | lwz TMP2, TMPD_LO + | lwz TMP1, TAB:RB->array + | fcmpu cr1, f0, f2 + | cmplw cr0, TMP0, TMP2 + | crand 4*cr0+gt, 4*cr0+gt, 4*cr1+eq + | slwi TMP0, TMP2, 3 + |.endif + | ble ->vmeta_tsetv // Integer key and in array part? + | lwzx TMP2, TMP1, TMP0 + | lbz TMP3, TAB:RB->marked + | lfdx f14, BASE, RA + | checknil TMP2; beq >3 + |1: + | andix. TMP2, TMP3, LJ_GC_BLACK // isblack(table) + | stfdx f14, TMP1, TMP0 + | bne >7 + |2: + | ins_next + | + |3: // Check for __newindex if previous value is nil. + | lwz TAB:TMP2, TAB:RB->metatable + | cmplwi TAB:TMP2, 0 + | beq <1 // No metatable: done. + | lbz TMP2, TAB:TMP2->nomm + | andix. TMP2, TMP2, 1<<MM_newindex + | bne <1 // 'no __newindex' flag set: done. + | b ->vmeta_tsetv + | + |5: + | checkstr CARG2; bne ->vmeta_tsetv + |.if not DUALNUM + | lwz STR:RC, 4(RC) + |.endif + | b ->BC_TSETS_Z // String key? + | + |7: // Possible table write barrier for the value. Skip valiswhite check. + | barrierback TAB:RB, TMP3, TMP0 + | b <2 + break; + case BC_TSETS: + | // RA = src*8, RB = table*8, RC = str_const*8 (~) + | lwzux CARG1, RB, BASE + | srwi TMP1, RC, 1 + | lwz TAB:RB, 4(RB) + | subfic TMP1, TMP1, -4 + | checktab CARG1 + | lwzx STR:RC, KBASE, TMP1 // KBASE-4-str_const*4 + | bne ->vmeta_tsets1 + |->BC_TSETS_Z: + | // TAB:RB = GCtab *, STR:RC = GCstr *, RA = src*8 + | lwz TMP0, TAB:RB->hmask + | lwz TMP1, STR:RC->hash + | lwz NODE:TMP2, TAB:RB->node + | stb ZERO, TAB:RB->nomm // Clear metamethod cache. + | and TMP1, TMP1, TMP0 // idx = str->hash & tab->hmask + | lfdx f14, BASE, RA + | slwi TMP0, TMP1, 5 + | slwi TMP1, TMP1, 3 + | sub TMP1, TMP0, TMP1 + | lbz TMP3, TAB:RB->marked + | add NODE:TMP2, NODE:TMP2, TMP1 // node = tab->node + (idx*32-idx*8) + |1: + | lwz CARG1, NODE:TMP2->key + | lwz TMP0, 4+offsetof(Node, key)(NODE:TMP2) + | lwz CARG2, NODE:TMP2->val + | lwz NODE:TMP1, NODE:TMP2->next + | checkstr CARG1; bne >5 + | cmpw TMP0, STR:RC; bne >5 + | checknil CARG2; beq >4 // Key found, but nil value? + |2: + | andix. TMP0, TMP3, LJ_GC_BLACK // isblack(table) + | stfd f14, NODE:TMP2->val + | bne >7 + |3: + | ins_next + | + |4: // Check for __newindex if previous value is nil. + | lwz TAB:TMP1, TAB:RB->metatable + | cmplwi TAB:TMP1, 0 + | beq <2 // No metatable: done. + | lbz TMP0, TAB:TMP1->nomm + | andix. TMP0, TMP0, 1<<MM_newindex + | bne <2 // 'no __newindex' flag set: done. + | b ->vmeta_tsets + | + |5: // Follow hash chain. + | cmplwi NODE:TMP1, 0 + | mr NODE:TMP2, NODE:TMP1 + | bne <1 + | // End of hash chain: key not found, add a new one. + | + | // But check for __newindex first. + | lwz TAB:TMP1, TAB:RB->metatable + | la CARG3, DISPATCH_GL(tmptv)(DISPATCH) + | stw PC, SAVE_PC + | mr CARG1, L + | cmplwi TAB:TMP1, 0 + | stp BASE, L->base + | beq >6 // No metatable: continue. + | lbz TMP0, TAB:TMP1->nomm + | andix. TMP0, TMP0, 1<<MM_newindex + | beq ->vmeta_tsets // 'no __newindex' flag NOT set: check. + |6: + | li TMP0, LJ_TSTR + | stw STR:RC, 4(CARG3) + | mr CARG2, TAB:RB + | stw TMP0, 0(CARG3) + | bl extern lj_tab_newkey // (lua_State *L, GCtab *t, TValue *k) + | // Returns TValue *. + | lp BASE, L->base + | stfd f14, 0(CRET1) + | b <3 // No 2nd write barrier needed. + | + |7: // Possible table write barrier for the value. Skip valiswhite check. + | barrierback TAB:RB, TMP3, TMP0 + | b <3 + break; + case BC_TSETB: + | // RA = src*8, RB = table*8, RC = index*8 + | lwzux CARG1, RB, BASE + | srwi TMP0, RC, 3 + | lwz TAB:RB, 4(RB) + | checktab CARG1; bne ->vmeta_tsetb + | lwz TMP1, TAB:RB->asize + | lwz TMP2, TAB:RB->array + | lbz TMP3, TAB:RB->marked + | cmplw TMP0, TMP1 + | lfdx f14, BASE, RA + | bge ->vmeta_tsetb + | lwzx TMP1, TMP2, RC + | checknil TMP1; beq >5 + |1: + | andix. TMP0, TMP3, LJ_GC_BLACK // isblack(table) + | stfdx f14, TMP2, RC + | bne >7 + |2: + | ins_next + | + |5: // Check for __newindex if previous value is nil. + | lwz TAB:TMP1, TAB:RB->metatable + | cmplwi TAB:TMP1, 0 + | beq <1 // No metatable: done. + | lbz TMP1, TAB:TMP1->nomm + | andix. TMP1, TMP1, 1<<MM_newindex + | bne <1 // 'no __newindex' flag set: done. + | b ->vmeta_tsetb // Caveat: preserve TMP0! + | + |7: // Possible table write barrier for the value. Skip valiswhite check. + | barrierback TAB:RB, TMP3, TMP0 + | b <2 + break; + case BC_TSETR: + | // RA = dst*8, RB = table*8, RC = key*8 + | add RB, BASE, RB + | lwz TAB:CARG2, 4(RB) + |.if DUALNUM + | add RC, BASE, RC + | lbz TMP3, TAB:CARG2->marked + | lwz TMP0, TAB:CARG2->asize + | lwz CARG3, 4(RC) + | lwz TMP1, TAB:CARG2->array + |.else + | lfdx f0, BASE, RC + | lbz TMP3, TAB:CARG2->marked + | lwz TMP0, TAB:CARG2->asize + | toint CARG3, f0 + | lwz TMP1, TAB:CARG2->array + |.endif + | andix. TMP2, TMP3, LJ_GC_BLACK // isblack(table) + | bne >7 + |2: + | cmplw TMP0, CARG3 + | slwi TMP2, CARG3, 3 + | lfdx f14, BASE, RA + | ble ->vmeta_tsetr // In array part? + | ins_next1 + | stfdx f14, TMP1, TMP2 + | ins_next2 + | + |7: // Possible table write barrier for the value. Skip valiswhite check. + | barrierback TAB:CARG2, TMP3, TMP2 + | b <2 + break; + + + case BC_TSETM: + | // RA = base*8 (table at base-1), RD = num_const*8 (start index) + | add RA, BASE, RA + |1: + | add TMP3, KBASE, RD + | lwz TAB:CARG2, -4(RA) // Guaranteed to be a table. + | addic. TMP0, MULTRES, -8 + | lwz TMP3, 4(TMP3) // Integer constant is in lo-word. + | srwi CARG3, TMP0, 3 + | beq >4 // Nothing to copy? + | add CARG3, CARG3, TMP3 + | lwz TMP2, TAB:CARG2->asize + | slwi TMP1, TMP3, 3 + | lbz TMP3, TAB:CARG2->marked + | cmplw CARG3, TMP2 + | add TMP2, RA, TMP0 + | lwz TMP0, TAB:CARG2->array + | bgt >5 + | add TMP1, TMP1, TMP0 + | andix. TMP0, TMP3, LJ_GC_BLACK // isblack(table) + |3: // Copy result slots to table. + | lfd f0, 0(RA) + | addi RA, RA, 8 + | cmpw cr1, RA, TMP2 + | stfd f0, 0(TMP1) + | addi TMP1, TMP1, 8 + | blt cr1, <3 + | bne >7 + |4: + | ins_next + | + |5: // Need to resize array part. + | stp BASE, L->base + | mr CARG1, L + | stw PC, SAVE_PC + | mr SAVE0, RD + | bl extern lj_tab_reasize // (lua_State *L, GCtab *t, int nasize) + | // Must not reallocate the stack. + | mr RD, SAVE0 + | b <1 + | + |7: // Possible table write barrier for any value. Skip valiswhite check. + | barrierback TAB:CARG2, TMP3, TMP0 + | b <4 + break; + + /* -- Calls and vararg handling ----------------------------------------- */ + + case BC_CALLM: + | // RA = base*8, (RB = (nresults+1)*8,) RC = extra_nargs*8 + | add NARGS8:RC, NARGS8:RC, MULTRES + | // Fall through. Assumes BC_CALL follows. + break; + case BC_CALL: + | // RA = base*8, (RB = (nresults+1)*8,) RC = (nargs+1)*8 + | mr TMP2, BASE + | lwzux TMP0, BASE, RA + | lwz LFUNC:RB, 4(BASE) + | subi NARGS8:RC, NARGS8:RC, 8 + | addi BASE, BASE, 8 + | checkfunc TMP0; bne ->vmeta_call + | ins_call + break; + + case BC_CALLMT: + | // RA = base*8, (RB = 0,) RC = extra_nargs*8 + | add NARGS8:RC, NARGS8:RC, MULTRES + | // Fall through. Assumes BC_CALLT follows. + break; + case BC_CALLT: + | // RA = base*8, (RB = 0,) RC = (nargs+1)*8 + | lwzux TMP0, RA, BASE + | lwz LFUNC:RB, 4(RA) + | subi NARGS8:RC, NARGS8:RC, 8 + | lwz TMP1, FRAME_PC(BASE) + | checkfunc TMP0 + | addi RA, RA, 8 + | bne ->vmeta_callt + |->BC_CALLT_Z: + | andix. TMP0, TMP1, FRAME_TYPE // Caveat: preserve cr0 until the crand. + | lbz TMP3, LFUNC:RB->ffid + | xori TMP2, TMP1, FRAME_VARG + | cmplwi cr1, NARGS8:RC, 0 + | bne >7 + |1: + | stw LFUNC:RB, FRAME_FUNC(BASE) // Copy function down, but keep PC. + | li TMP2, 0 + | cmplwi cr7, TMP3, 1 // (> FF_C) Calling a fast function? + | beq cr1, >3 + |2: + | addi TMP3, TMP2, 8 + | lfdx f0, RA, TMP2 + | cmplw cr1, TMP3, NARGS8:RC + | stfdx f0, BASE, TMP2 + | mr TMP2, TMP3 + | bne cr1, <2 + |3: + | crand 4*cr0+eq, 4*cr0+eq, 4*cr7+gt + | beq >5 + |4: + | ins_callt + | + |5: // Tailcall to a fast function with a Lua frame below. + | lwz INS, -4(TMP1) + | decode_RA8 RA, INS + | sub TMP1, BASE, RA + | lwz LFUNC:TMP1, FRAME_FUNC-8(TMP1) + | lwz TMP1, LFUNC:TMP1->pc + | lwz KBASE, PC2PROTO(k)(TMP1) // Need to prepare KBASE. + | b <4 + | + |7: // Tailcall from a vararg function. + | andix. TMP0, TMP2, FRAME_TYPEP + | bne <1 // Vararg frame below? + | sub BASE, BASE, TMP2 // Relocate BASE down. + | lwz TMP1, FRAME_PC(BASE) + | andix. TMP0, TMP1, FRAME_TYPE + | b <1 + break; + + case BC_ITERC: + | // RA = base*8, (RB = (nresults+1)*8, RC = (nargs+1)*8 ((2+1)*8)) + | mr TMP2, BASE + | add BASE, BASE, RA + | lwz TMP1, -24(BASE) + | lwz LFUNC:RB, -20(BASE) + | lfd f1, -8(BASE) + | lfd f0, -16(BASE) + | stw TMP1, 0(BASE) // Copy callable. + | stw LFUNC:RB, 4(BASE) + | checkfunc TMP1 + | stfd f1, 16(BASE) // Copy control var. + | li NARGS8:RC, 16 // Iterators get 2 arguments. + | stfdu f0, 8(BASE) // Copy state. + | bne ->vmeta_call + | ins_call + break; + + case BC_ITERN: + | // RA = base*8, (RB = (nresults+1)*8, RC = (nargs+1)*8 (2+1)*8) + |.if JIT + | // NYI: add hotloop, record BC_ITERN. + |.endif + | add RA, BASE, RA + | lwz TAB:RB, -12(RA) + | lwz RC, -4(RA) // Get index from control var. + | lwz TMP0, TAB:RB->asize + | lwz TMP1, TAB:RB->array + | addi PC, PC, 4 + |1: // Traverse array part. + | cmplw RC, TMP0 + | slwi TMP3, RC, 3 + | bge >5 // Index points after array part? + | lwzx TMP2, TMP1, TMP3 + | lfdx f0, TMP1, TMP3 + | checknil TMP2 + | lwz INS, -4(PC) + | beq >4 + |.if DUALNUM + | stw RC, 4(RA) + | stw TISNUM, 0(RA) + |.else + | tonum_u f1, RC + |.endif + | addi RC, RC, 1 + | addis TMP3, PC, -(BCBIAS_J*4 >> 16) + | stfd f0, 8(RA) + | decode_RD4 TMP1, INS + | stw RC, -4(RA) // Update control var. + | add PC, TMP1, TMP3 + |.if not DUALNUM + | stfd f1, 0(RA) + |.endif + |3: + | ins_next + | + |4: // Skip holes in array part. + | addi RC, RC, 1 + | b <1 + | + |5: // Traverse hash part. + | lwz TMP1, TAB:RB->hmask + | sub RC, RC, TMP0 + | lwz TMP2, TAB:RB->node + |6: + | cmplw RC, TMP1 // End of iteration? Branch to ITERL+1. + | slwi TMP3, RC, 5 + | bgty <3 + | slwi RB, RC, 3 + | sub TMP3, TMP3, RB + | lwzx RB, TMP2, TMP3 + | lfdx f0, TMP2, TMP3 + | add NODE:TMP3, TMP2, TMP3 + | checknil RB + | lwz INS, -4(PC) + | beq >7 + | lfd f1, NODE:TMP3->key + | addis TMP2, PC, -(BCBIAS_J*4 >> 16) + | stfd f0, 8(RA) + | add RC, RC, TMP0 + | decode_RD4 TMP1, INS + | stfd f1, 0(RA) + | addi RC, RC, 1 + | add PC, TMP1, TMP2 + | stw RC, -4(RA) // Update control var. + | b <3 + | + |7: // Skip holes in hash part. + | addi RC, RC, 1 + | b <6 + break; + + case BC_ISNEXT: + | // RA = base*8, RD = target (points to ITERN) + | add RA, BASE, RA + | lwz TMP0, -24(RA) + | lwz CFUNC:TMP1, -20(RA) + | lwz TMP2, -16(RA) + | lwz TMP3, -8(RA) + | cmpwi cr0, TMP2, LJ_TTAB + | cmpwi cr1, TMP0, LJ_TFUNC + | cmpwi cr6, TMP3, LJ_TNIL + | bne cr1, >5 + | lbz TMP1, CFUNC:TMP1->ffid + | crand 4*cr0+eq, 4*cr0+eq, 4*cr6+eq + | cmpwi cr7, TMP1, FF_next_N + | srwi TMP0, RD, 1 + | crand 4*cr0+eq, 4*cr0+eq, 4*cr7+eq + | add TMP3, PC, TMP0 + | bne cr0, >5 + | lus TMP1, 0xfffe + | ori TMP1, TMP1, 0x7fff + | stw ZERO, -4(RA) // Initialize control var. + | stw TMP1, -8(RA) + | addis PC, TMP3, -(BCBIAS_J*4 >> 16) + |1: + | ins_next + |5: // Despecialize bytecode if any of the checks fail. + | li TMP0, BC_JMP + | li TMP1, BC_ITERC + | stb TMP0, -1(PC) + | addis PC, TMP3, -(BCBIAS_J*4 >> 16) + | stb TMP1, 3(PC) + | b <1 + break; + + case BC_VARG: + | // RA = base*8, RB = (nresults+1)*8, RC = numparams*8 + | lwz TMP0, FRAME_PC(BASE) + | add RC, BASE, RC + | add RA, BASE, RA + | addi RC, RC, FRAME_VARG + | add TMP2, RA, RB + | subi TMP3, BASE, 8 // TMP3 = vtop + | sub RC, RC, TMP0 // RC = vbase + | // Note: RC may now be even _above_ BASE if nargs was < numparams. + | cmplwi cr1, RB, 0 + |.if PPE + | sub TMP1, TMP3, RC + | cmpwi TMP1, 0 + |.else + | sub. TMP1, TMP3, RC + |.endif + | beq cr1, >5 // Copy all varargs? + | subi TMP2, TMP2, 16 + | ble >2 // No vararg slots? + |1: // Copy vararg slots to destination slots. + | lfd f0, 0(RC) + | addi RC, RC, 8 + | stfd f0, 0(RA) + | cmplw RA, TMP2 + | cmplw cr1, RC, TMP3 + | bge >3 // All destination slots filled? + | addi RA, RA, 8 + | blt cr1, <1 // More vararg slots? + |2: // Fill up remainder with nil. + | stw TISNIL, 0(RA) + | cmplw RA, TMP2 + | addi RA, RA, 8 + | blt <2 + |3: + | ins_next + | + |5: // Copy all varargs. + | lwz TMP0, L->maxstack + | li MULTRES, 8 // MULTRES = (0+1)*8 + | bley <3 // No vararg slots? + | add TMP2, RA, TMP1 + | cmplw TMP2, TMP0 + | addi MULTRES, TMP1, 8 + | bgt >7 + |6: + | lfd f0, 0(RC) + | addi RC, RC, 8 + | stfd f0, 0(RA) + | cmplw RC, TMP3 + | addi RA, RA, 8 + | blt <6 // More vararg slots? + | b <3 + | + |7: // Grow stack for varargs. + | mr CARG1, L + | stp RA, L->top + | sub SAVE0, RC, BASE // Need delta, because BASE may change. + | stp BASE, L->base + | sub RA, RA, BASE + | stw PC, SAVE_PC + | srwi CARG2, TMP1, 3 + | bl extern lj_state_growstack // (lua_State *L, int n) + | lp BASE, L->base + | add RA, BASE, RA + | add RC, BASE, SAVE0 + | subi TMP3, BASE, 8 + | b <6 + break; + + /* -- Returns ----------------------------------------------------------- */ + + case BC_RETM: + | // RA = results*8, RD = extra_nresults*8 + | add RD, RD, MULTRES // MULTRES >= 8, so RD >= 8. + | // Fall through. Assumes BC_RET follows. + break; + + case BC_RET: + | // RA = results*8, RD = (nresults+1)*8 + | lwz PC, FRAME_PC(BASE) + | add RA, BASE, RA + | mr MULTRES, RD + |1: + | andix. TMP0, PC, FRAME_TYPE + | xori TMP1, PC, FRAME_VARG + | bne ->BC_RETV_Z + | + |->BC_RET_Z: + | // BASE = base, RA = resultptr, RD = (nresults+1)*8, PC = return + | lwz INS, -4(PC) + | cmpwi RD, 8 + | subi TMP2, BASE, 8 + | subi RC, RD, 8 + | decode_RB8 RB, INS + | beq >3 + | li TMP1, 0 + |2: + | addi TMP3, TMP1, 8 + | lfdx f0, RA, TMP1 + | cmpw TMP3, RC + | stfdx f0, TMP2, TMP1 + | beq >3 + | addi TMP1, TMP3, 8 + | lfdx f1, RA, TMP3 + | cmpw TMP1, RC + | stfdx f1, TMP2, TMP3 + | bne <2 + |3: + |5: + | cmplw RB, RD + | decode_RA8 RA, INS + | bgt >6 + | sub BASE, TMP2, RA + | lwz LFUNC:TMP1, FRAME_FUNC(BASE) + | ins_next1 + | lwz TMP1, LFUNC:TMP1->pc + | lwz KBASE, PC2PROTO(k)(TMP1) + | ins_next2 + | + |6: // Fill up results with nil. + | subi TMP1, RD, 8 + | addi RD, RD, 8 + | stwx TISNIL, TMP2, TMP1 + | b <5 + | + |->BC_RETV_Z: // Non-standard return case. + | andix. TMP2, TMP1, FRAME_TYPEP + | bne ->vm_return + | // Return from vararg function: relocate BASE down. + | sub BASE, BASE, TMP1 + | lwz PC, FRAME_PC(BASE) + | b <1 + break; + + case BC_RET0: case BC_RET1: + | // RA = results*8, RD = (nresults+1)*8 + | lwz PC, FRAME_PC(BASE) + | add RA, BASE, RA + | mr MULTRES, RD + | andix. TMP0, PC, FRAME_TYPE + | xori TMP1, PC, FRAME_VARG + | bney ->BC_RETV_Z + | + | lwz INS, -4(PC) + | subi TMP2, BASE, 8 + | decode_RB8 RB, INS + if (op == BC_RET1) { + | lfd f0, 0(RA) + | stfd f0, 0(TMP2) + } + |5: + | cmplw RB, RD + | decode_RA8 RA, INS + | bgt >6 + | sub BASE, TMP2, RA + | lwz LFUNC:TMP1, FRAME_FUNC(BASE) + | ins_next1 + | lwz TMP1, LFUNC:TMP1->pc + | lwz KBASE, PC2PROTO(k)(TMP1) + | ins_next2 + | + |6: // Fill up results with nil. + | subi TMP1, RD, 8 + | addi RD, RD, 8 + | stwx TISNIL, TMP2, TMP1 + | b <5 + break; + + /* -- Loops and branches ------------------------------------------------ */ + + case BC_FORL: + |.if JIT + | hotloop + |.endif + | // Fall through. Assumes BC_IFORL follows. + break; + + case BC_JFORI: + case BC_JFORL: +#if !LJ_HASJIT + break; +#endif + case BC_FORI: + case BC_IFORL: + | // RA = base*8, RD = target (after end of loop or start of loop) + vk = (op == BC_IFORL || op == BC_JFORL); + |.if DUALNUM + | // Integer loop. + | lwzux TMP1, RA, BASE + | lwz CARG1, FORL_IDX*8+4(RA) + | cmplw cr0, TMP1, TISNUM + if (vk) { + | lwz CARG3, FORL_STEP*8+4(RA) + | bne >9 + |.if GPR64 + | // Need to check overflow for (a<<32) + (b<<32). + | rldicr TMP0, CARG1, 32, 31 + | rldicr TMP2, CARG3, 32, 31 + | add CARG1, CARG1, CARG3 + | addo. TMP0, TMP0, TMP2 + |.else + | addo. CARG1, CARG1, CARG3 + |.endif + | cmpwi cr6, CARG3, 0 + | lwz CARG2, FORL_STOP*8+4(RA) + | bso >6 + |4: + | stw CARG1, FORL_IDX*8+4(RA) + } else { + | lwz TMP3, FORL_STEP*8(RA) + | lwz CARG3, FORL_STEP*8+4(RA) + | lwz TMP2, FORL_STOP*8(RA) + | lwz CARG2, FORL_STOP*8+4(RA) + | cmplw cr7, TMP3, TISNUM + | cmplw cr1, TMP2, TISNUM + | crand 4*cr0+eq, 4*cr0+eq, 4*cr7+eq + | crand 4*cr0+eq, 4*cr0+eq, 4*cr1+eq + | cmpwi cr6, CARG3, 0 + | bne >9 + } + | blt cr6, >5 + | cmpw CARG1, CARG2 + |1: + | stw TISNUM, FORL_EXT*8(RA) + if (op != BC_JFORL) { + | srwi RD, RD, 1 + } + | stw CARG1, FORL_EXT*8+4(RA) + if (op != BC_JFORL) { + | add RD, PC, RD + } + if (op == BC_FORI) { + | bgt >3 // See FP loop below. + } else if (op == BC_JFORI) { + | addis PC, RD, -(BCBIAS_J*4 >> 16) + | bley >7 + } else if (op == BC_IFORL) { + | bgt >2 + | addis PC, RD, -(BCBIAS_J*4 >> 16) + } else { + | bley =>BC_JLOOP + } + |2: + | ins_next + |5: // Invert check for negative step. + | cmpw CARG2, CARG1 + | b <1 + if (vk) { + |6: // Potential overflow. + | checkov TMP0, <4 // Ignore unrelated overflow. + | b <2 + } + |.endif + if (vk) { + |.if DUALNUM + |9: // FP loop. + | lfd f1, FORL_IDX*8(RA) + |.else + | lfdux f1, RA, BASE + |.endif + | lfd f3, FORL_STEP*8(RA) + | lfd f2, FORL_STOP*8(RA) + | lwz TMP3, FORL_STEP*8(RA) + | fadd f1, f1, f3 + | stfd f1, FORL_IDX*8(RA) + } else { + |.if DUALNUM + |9: // FP loop. + |.else + | lwzux TMP1, RA, BASE + | lwz TMP3, FORL_STEP*8(RA) + | lwz TMP2, FORL_STOP*8(RA) + | cmplw cr0, TMP1, TISNUM + | cmplw cr7, TMP3, TISNUM + | cmplw cr1, TMP2, TISNUM + |.endif + | lfd f1, FORL_IDX*8(RA) + | crand 4*cr0+lt, 4*cr0+lt, 4*cr7+lt + | crand 4*cr0+lt, 4*cr0+lt, 4*cr1+lt + | lfd f2, FORL_STOP*8(RA) + | bge ->vmeta_for + } + | cmpwi cr6, TMP3, 0 + if (op != BC_JFORL) { + | srwi RD, RD, 1 + } + | stfd f1, FORL_EXT*8(RA) + if (op != BC_JFORL) { + | add RD, PC, RD + } + | fcmpu cr0, f1, f2 + if (op == BC_JFORI) { + | addis PC, RD, -(BCBIAS_J*4 >> 16) + } + | blt cr6, >5 + if (op == BC_FORI) { + | bgt >3 + } else if (op == BC_IFORL) { + |.if DUALNUM + | bgty <2 + |.else + | bgt >2 + |.endif + |1: + | addis PC, RD, -(BCBIAS_J*4 >> 16) + } else if (op == BC_JFORI) { + | bley >7 + } else { + | bley =>BC_JLOOP + } + |.if DUALNUM + | b <2 + |.else + |2: + | ins_next + |.endif + |5: // Negative step. + if (op == BC_FORI) { + | bge <2 + |3: // Used by integer loop, too. + | addis PC, RD, -(BCBIAS_J*4 >> 16) + } else if (op == BC_IFORL) { + | bgey <1 + } else if (op == BC_JFORI) { + | bgey >7 + } else { + | bgey =>BC_JLOOP + } + | b <2 + if (op == BC_JFORI) { + |7: + | lwz INS, -4(PC) + | decode_RD8 RD, INS + | b =>BC_JLOOP + } + break; + + case BC_ITERL: + |.if JIT + | hotloop + |.endif + | // Fall through. Assumes BC_IITERL follows. + break; + + case BC_JITERL: +#if !LJ_HASJIT + break; +#endif + case BC_IITERL: + | // RA = base*8, RD = target + | lwzux TMP1, RA, BASE + | lwz TMP2, 4(RA) + | checknil TMP1; beq >1 // Stop if iterator returned nil. + if (op == BC_JITERL) { + | stw TMP1, -8(RA) + | stw TMP2, -4(RA) + | b =>BC_JLOOP + } else { + | branch_RD // Otherwise save control var + branch. + | stw TMP1, -8(RA) + | stw TMP2, -4(RA) + } + |1: + | ins_next + break; + + case BC_LOOP: + | // RA = base*8, RD = target (loop extent) + | // Note: RA/RD is only used by trace recorder to determine scope/extent + | // This opcode does NOT jump, it's only purpose is to detect a hot loop. + |.if JIT + | hotloop + |.endif + | // Fall through. Assumes BC_ILOOP follows. + break; + + case BC_ILOOP: + | // RA = base*8, RD = target (loop extent) + | ins_next + break; + + case BC_JLOOP: + |.if JIT + | // RA = base*8 (ignored), RD = traceno*8 + | lwz TMP1, DISPATCH_J(trace)(DISPATCH) + | srwi RD, RD, 1 + | // Traces on PPC don't store the trace number, so use 0. + | stw ZERO, DISPATCH_GL(vmstate)(DISPATCH) + | lwzx TRACE:TMP2, TMP1, RD + | clrso TMP1 + | lp TMP2, TRACE:TMP2->mcode + | stw BASE, DISPATCH_GL(jit_base)(DISPATCH) + | mtctr TMP2 + | addi JGL, DISPATCH, GG_DISP2G+32768 + | stw L, DISPATCH_GL(tmpbuf.L)(DISPATCH) + | bctr + |.endif + break; + + case BC_JMP: + | // RA = base*8 (only used by trace recorder), RD = target + | branch_RD + | ins_next + break; + + /* -- Function headers -------------------------------------------------- */ + + case BC_FUNCF: + |.if JIT + | hotcall + |.endif + case BC_FUNCV: /* NYI: compiled vararg functions. */ + | // Fall through. Assumes BC_IFUNCF/BC_IFUNCV follow. + break; + + case BC_JFUNCF: +#if !LJ_HASJIT + break; +#endif + case BC_IFUNCF: + | // BASE = new base, RA = BASE+framesize*8, RB = LFUNC, RC = nargs*8 + | lwz TMP2, L->maxstack + | lbz TMP1, -4+PC2PROTO(numparams)(PC) + | lwz KBASE, -4+PC2PROTO(k)(PC) + | cmplw RA, TMP2 + | slwi TMP1, TMP1, 3 + | bgt ->vm_growstack_l + if (op != BC_JFUNCF) { + | ins_next1 + } + |2: + | cmplw NARGS8:RC, TMP1 // Check for missing parameters. + | blt >3 + if (op == BC_JFUNCF) { + | decode_RD8 RD, INS + | b =>BC_JLOOP + } else { + | ins_next2 + } + | + |3: // Clear missing parameters. + | stwx TISNIL, BASE, NARGS8:RC + | addi NARGS8:RC, NARGS8:RC, 8 + | b <2 + break; + + case BC_JFUNCV: +#if !LJ_HASJIT + break; +#endif + | NYI // NYI: compiled vararg functions + break; /* NYI: compiled vararg functions. */ + + case BC_IFUNCV: + | // BASE = new base, RA = BASE+framesize*8, RB = LFUNC, RC = nargs*8 + | lwz TMP2, L->maxstack + | add TMP1, BASE, RC + | add TMP0, RA, RC + | stw LFUNC:RB, 4(TMP1) // Store copy of LFUNC. + | addi TMP3, RC, 8+FRAME_VARG + | lwz KBASE, -4+PC2PROTO(k)(PC) + | cmplw TMP0, TMP2 + | stw TMP3, 0(TMP1) // Store delta + FRAME_VARG. + | bge ->vm_growstack_l + | lbz TMP2, -4+PC2PROTO(numparams)(PC) + | mr RA, BASE + | mr RC, TMP1 + | ins_next1 + | cmpwi TMP2, 0 + | addi BASE, TMP1, 8 + | beq >3 + |1: + | cmplw RA, RC // Less args than parameters? + | lwz TMP0, 0(RA) + | lwz TMP3, 4(RA) + | bge >4 + | stw TISNIL, 0(RA) // Clear old fixarg slot (help the GC). + | addi RA, RA, 8 + |2: + | addic. TMP2, TMP2, -1 + | stw TMP0, 8(TMP1) + | stw TMP3, 12(TMP1) + | addi TMP1, TMP1, 8 + | bne <1 + |3: + | ins_next2 + | + |4: // Clear missing parameters. + | li TMP0, LJ_TNIL + | b <2 + break; + + case BC_FUNCC: + case BC_FUNCCW: + | // BASE = new base, RA = BASE+framesize*8, RB = CFUNC, RC = nargs*8 + if (op == BC_FUNCC) { + | lp RD, CFUNC:RB->f + } else { + | lp RD, DISPATCH_GL(wrapf)(DISPATCH) + } + | add TMP1, RA, NARGS8:RC + | lwz TMP2, L->maxstack + | .toc lp TMP3, 0(RD) + | add RC, BASE, NARGS8:RC + | stp BASE, L->base + | cmplw TMP1, TMP2 + | stp RC, L->top + | li_vmstate C + |.if TOC + | mtctr TMP3 + |.else + | mtctr RD + |.endif + if (op == BC_FUNCCW) { + | lp CARG2, CFUNC:RB->f + } + | mr CARG1, L + | bgt ->vm_growstack_c // Need to grow stack. + | .toc lp TOCREG, TOC_OFS(RD) + | .tocenv lp ENVREG, ENV_OFS(RD) + | st_vmstate + | bctrl // (lua_State *L [, lua_CFunction f]) + | // Returns nresults. + | lp BASE, L->base + | .toc ld TOCREG, SAVE_TOC + | slwi RD, CRET1, 3 + | lp TMP1, L->top + | li_vmstate INTERP + | lwz PC, FRAME_PC(BASE) // Fetch PC of caller. + | stw L, DISPATCH_GL(cur_L)(DISPATCH) + | sub RA, TMP1, RD // RA = L->top - nresults*8 + | st_vmstate + | b ->vm_returnc + break; + + /* ---------------------------------------------------------------------- */ + + default: + fprintf(stderr, "Error: undefined opcode BC_%s\n", bc_names[op]); + exit(2); + break; + } +} + +static int build_backend(BuildCtx *ctx) +{ + int op; + + dasm_growpc(Dst, BC__MAX); + + build_subroutines(ctx); + + |.code_op + for (op = 0; op < BC__MAX; op++) + build_ins(ctx, (BCOp)op, op); + + return BC__MAX; +} + +/* Emit pseudo frame-info for all assembler functions. */ +static void emit_asm_debug(BuildCtx *ctx) +{ + int fcofs = (int)((uint8_t *)ctx->glob[GLOB_vm_ffi_call] - ctx->code); + int i; + switch (ctx->mode) { + case BUILD_elfasm: + fprintf(ctx->fp, "\t.section .debug_frame,\"\",@progbits\n"); + fprintf(ctx->fp, + ".Lframe0:\n" + "\t.long .LECIE0-.LSCIE0\n" + ".LSCIE0:\n" + "\t.long 0xffffffff\n" + "\t.byte 0x1\n" + "\t.string \"\"\n" + "\t.uleb128 0x1\n" + "\t.sleb128 -4\n" + "\t.byte 65\n" + "\t.byte 0xc\n\t.uleb128 1\n\t.uleb128 0\n" + "\t.align 2\n" + ".LECIE0:\n\n"); + fprintf(ctx->fp, + ".LSFDE0:\n" + "\t.long .LEFDE0-.LASFDE0\n" + ".LASFDE0:\n" + "\t.long .Lframe0\n" + "\t.long .Lbegin\n" + "\t.long %d\n" + "\t.byte 0xe\n\t.uleb128 %d\n" + "\t.byte 0x11\n\t.uleb128 65\n\t.sleb128 -1\n" + "\t.byte 0x5\n\t.uleb128 70\n\t.uleb128 55\n", + fcofs, CFRAME_SIZE); + for (i = 14; i <= 31; i++) + fprintf(ctx->fp, + "\t.byte %d\n\t.uleb128 %d\n" + "\t.byte %d\n\t.uleb128 %d\n", + 0x80+i, 37+(31-i), 0x80+32+i, 2+2*(31-i)); + fprintf(ctx->fp, + "\t.align 2\n" + ".LEFDE0:\n\n"); +#if LJ_HASFFI + fprintf(ctx->fp, + ".LSFDE1:\n" + "\t.long .LEFDE1-.LASFDE1\n" + ".LASFDE1:\n" + "\t.long .Lframe0\n" +#if LJ_TARGET_PS3 + "\t.long .lj_vm_ffi_call\n" +#else + "\t.long lj_vm_ffi_call\n" +#endif + "\t.long %d\n" + "\t.byte 0x11\n\t.uleb128 65\n\t.sleb128 -1\n" + "\t.byte 0x8e\n\t.uleb128 2\n" + "\t.byte 0xd\n\t.uleb128 0xe\n" + "\t.align 2\n" + ".LEFDE1:\n\n", (int)ctx->codesz - fcofs); +#endif +#if !LJ_NO_UNWIND + fprintf(ctx->fp, "\t.section .eh_frame,\"a\",@progbits\n"); + fprintf(ctx->fp, + ".Lframe1:\n" + "\t.long .LECIE1-.LSCIE1\n" + ".LSCIE1:\n" + "\t.long 0\n" + "\t.byte 0x1\n" + "\t.string \"zPR\"\n" + "\t.uleb128 0x1\n" + "\t.sleb128 -4\n" + "\t.byte 65\n" + "\t.uleb128 6\n" /* augmentation length */ + "\t.byte 0x1b\n" /* pcrel|sdata4 */ + "\t.long lj_err_unwind_dwarf-.\n" + "\t.byte 0x1b\n" /* pcrel|sdata4 */ + "\t.byte 0xc\n\t.uleb128 1\n\t.uleb128 0\n" + "\t.align 2\n" + ".LECIE1:\n\n"); + fprintf(ctx->fp, + ".LSFDE2:\n" + "\t.long .LEFDE2-.LASFDE2\n" + ".LASFDE2:\n" + "\t.long .LASFDE2-.Lframe1\n" + "\t.long .Lbegin-.\n" + "\t.long %d\n" + "\t.uleb128 0\n" /* augmentation length */ + "\t.byte 0xe\n\t.uleb128 %d\n" + "\t.byte 0x11\n\t.uleb128 65\n\t.sleb128 -1\n" + "\t.byte 0x5\n\t.uleb128 70\n\t.uleb128 55\n", + fcofs, CFRAME_SIZE); + for (i = 14; i <= 31; i++) + fprintf(ctx->fp, + "\t.byte %d\n\t.uleb128 %d\n" + "\t.byte %d\n\t.uleb128 %d\n", + 0x80+i, 37+(31-i), 0x80+32+i, 2+2*(31-i)); + fprintf(ctx->fp, + "\t.align 2\n" + ".LEFDE2:\n\n"); +#if LJ_HASFFI + fprintf(ctx->fp, + ".Lframe2:\n" + "\t.long .LECIE2-.LSCIE2\n" + ".LSCIE2:\n" + "\t.long 0\n" + "\t.byte 0x1\n" + "\t.string \"zR\"\n" + "\t.uleb128 0x1\n" + "\t.sleb128 -4\n" + "\t.byte 65\n" + "\t.uleb128 1\n" /* augmentation length */ + "\t.byte 0x1b\n" /* pcrel|sdata4 */ + "\t.byte 0xc\n\t.uleb128 1\n\t.uleb128 0\n" + "\t.align 2\n" + ".LECIE2:\n\n"); + fprintf(ctx->fp, + ".LSFDE3:\n" + "\t.long .LEFDE3-.LASFDE3\n" + ".LASFDE3:\n" + "\t.long .LASFDE3-.Lframe2\n" + "\t.long lj_vm_ffi_call-.\n" + "\t.long %d\n" + "\t.uleb128 0\n" /* augmentation length */ + "\t.byte 0x11\n\t.uleb128 65\n\t.sleb128 -1\n" + "\t.byte 0x8e\n\t.uleb128 2\n" + "\t.byte 0xd\n\t.uleb128 0xe\n" + "\t.align 2\n" + ".LEFDE3:\n\n", (int)ctx->codesz - fcofs); +#endif +#endif + break; + default: + break; + } +} + |