You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@trafficserver.apache.org by zw...@apache.org on 2015/07/29 01:39:42 UTC
[04/62] [abbrv] trafficserver git commit: TS-3783 TS-3030 Add luajit
v2.0.4 as a subtree
http://git-wip-us.apache.org/repos/asf/trafficserver/blob/1f27b840/lib/luajit/src/vm_ppc.dasc
----------------------------------------------------------------------
diff --git a/lib/luajit/src/vm_ppc.dasc b/lib/luajit/src/vm_ppc.dasc
new file mode 100644
index 0000000..ad8a023
--- /dev/null
+++ b/lib/luajit/src/vm_ppc.dasc
@@ -0,0 +1,5160 @@
+|// Low-level VM code for PowerPC CPUs.
+|// 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: a full PPC64 _LP64 port is not planned.
+|// 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
+|
+|//-----------------------------------------------------------------------
+|
+|// These basic macros should really be part of DynASM.
+|.macro srwi, rx, ry, n; rlwinm rx, ry, 32-n, n, 31; .endmacro
+|.macro slwi, rx, ry, n; rlwinm rx, ry, n, 0, 31-n; .endmacro
+|.macro rotlwi, rx, ry, n; rlwinm rx, ry, n, 0, 31; .endmacro
+|.macro rotlw, rx, ry, rn; rlwnm rx, ry, rn, 0, 31; .endmacro
+|.macro subi, rx, ry, i; addi rx, ry, -i; .endmacro
+|
+|// 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 TMP0, L->cframe
+ | stp CARG3, SAVE_CFRAME
+ | stw CARG1, SAVE_PC // Any value outside of bytecode is ok.
+ | beq >3
+ |
+ | // Resume after yield (like a return).
+ | 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
+ | stw CARG3, SAVE_NRES
+ | mr L, CARG1
+ | stw CARG1, SAVE_L
+ | mr BASE, CARG2
+ | stp sp, L->cframe // Add our C frame to cframe chain.
+ | lwz DISPATCH, L->glref // Setup pointer to dispatch table.
+ | stw CARG1, SAVE_PC // Any value outside of bytecode is ok.
+ | stp TMP1, SAVE_CFRAME
+ | addi DISPATCH, DISPATCH, GG_G2DISP
+ |
+ |3: // Entry point for vm_cpcall/vm_resume (BASE = base, PC = ftype).
+ | 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
+ | stw CARG1, SAVE_PC // Any value outside of bytecode is ok.
+ | sub TMP0, TMP0, TMP1 // Compute -savestack(L, L->top).
+ | lp TMP1, L->cframe
+ | stp sp, L->cframe // Add our C frame to cframe chain.
+ | .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
+ | mtctr CARG4
+ | bctrl // (lua_State *L, lua_CFunction func, void *ud)
+ |.if PPE
+ | mr BASE, CRET1
+ | cmpwi CRET1, 0
+ |.else
+ | mr. BASE, CRET1
+ |.endif
+ | lwz DISPATCH, L->glref // Setup pointer to dispatch table.
+ | li PC, FRAME_CP
+ | addi DISPATCH, DISPATCH, GG_G2DISP
+ | 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_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
+ |
+ |//-- 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
+ |
+ |//-- 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_str_fromnumber // (lua_State *L, cTValue *o)
+ |.else
+ | bl extern lj_str_fromnum // (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
+ | 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
+ |
+ |->ff_math_deg:
+ |.ffunc_n math_rad
+ | lfd FARG2, CFUNC:RB->upvalue[0]
+ | fmul FARG1, FARG1, FARG2
+ | b ->fff_resn
+ |
+ |.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_1 string_len
+ | checkstr CARG3; bne ->fff_fallback
+ | lwz CRET1, STR:CARG1->len
+ | b ->fff_resi
+ |
+ |.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)
+ | // 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
+ |
+ |.ffunc string_rep // Only handle the 1-char case inline.
+ | ffgccheck
+ | cmplwi NARGS8:RC, 16
+ | lwz TMP0, 0(BASE)
+ | lwz STR:CARG1, 4(BASE)
+ | lwz CARG4, 8(BASE)
+ |.if DUALNUM
+ | lwz CARG3, 12(BASE)
+ |.else
+ | lfd FARG2, 8(BASE)
+ |.endif
+ | bne ->fff_fallback // Exactly 2 arguments.
+ | checkstr TMP0; bne ->fff_fallback
+ |.if DUALNUM
+ | checknum CARG4; bne ->fff_fallback
+ |.else
+ | checknum CARG4; bge ->fff_fallback
+ | toint CARG3, FARG2
+ |.endif
+ | lwz TMP0, STR:CARG1->len
+ | cmpwi CARG3, 0
+ | lwz TMP1, DISPATCH_GL(tmpbuf.sz)(DISPATCH)
+ | ble >2 // Count <= 0? (or non-int)
+ | cmplwi TMP0, 1
+ | subi TMP2, CARG3, 1
+ | blt >2 // Zero length string?
+ | cmplw cr1, TMP1, CARG3
+ | bne ->fff_fallback // Fallback for > 1-char strings.
+ | lbz TMP0, STR:CARG1[1]
+ | lp CARG2, DISPATCH_GL(tmpbuf.buf)(DISPATCH)
+ | blt cr1, ->fff_fallback
+ |1: // Fill buffer with char. Yes, this is suboptimal code (do you care?).
+ | cmplwi TMP2, 0
+ | stbx TMP0, CARG2, TMP2
+ | subi TMP2, TMP2, 1
+ | bne <1
+ | b ->fff_newstr
+ |2: // Return empty string.
+ | la STR:CARG1, DISPATCH_GL(strempty)(DISPATCH)
+ | li CARG3, LJ_TSTR
+ | b ->fff_restv
+ |
+ |.ffunc string_reverse
+ | ffgccheck
+ | cmplwi NARGS8:RC, 8
+ | lwz CARG3, 0(BASE)
+ | lwz STR:CARG1, 4(BASE)
+ | blt ->fff_fallback
+ | checkstr CARG3
+ | lwz TMP1, DISPATCH_GL(tmpbuf.sz)(DISPATCH)
+ | bne ->fff_fallback
+ | lwz CARG3, STR:CARG1->len
+ | la CARG1, #STR(STR:CARG1)
+ | lp CARG2, DISPATCH_GL(tmpbuf.buf)(DISPATCH)
+ | li TMP2, 0
+ | cmplw TMP1, CARG3
+ | subi TMP3, CARG3, 1
+ | blt ->fff_fallback
+ |1: // Reverse string copy.
+ | cmpwi TMP3, 0
+ | lbzx TMP1, CARG1, TMP2
+ | blty ->fff_newstr
+ | stbx TMP1, CARG2, TMP3
+ | subi TMP3, TMP3, 1
+ | addi TMP2, TMP2, 1
+ | b <1
+ |
+ |.macro ffstring_case, name, lo
+ | .ffunc name
+ | ffgccheck
+ | cmplwi NARGS8:RC, 8
+ | lwz CARG3, 0(BASE)
+ | lwz STR:CARG1, 4(BASE)
+ | blt ->fff_fallback
+ | checkstr CARG3
+ | lwz TMP1, DISPATCH_GL(tmpbuf.sz)(DISPATCH)
+ | bne ->fff_fallback
+ | lwz CARG3, STR:CARG1->len
+ | la CARG1, #STR(STR:CARG1)
+ | lp CARG2, DISPATCH_GL(tmpbuf.buf)(DISPATCH)
+ | cmplw TMP1, CARG3
+ | li TMP2, 0
+ | blt ->fff_fallback
+ |1: // ASCII case conversion.
+ | cmplw TMP2, CARG3
+ | lbzx TMP1, CARG1, TMP2
+ | bgey ->fff_newstr
+ | subi TMP0, TMP1, lo
+ | xori TMP3, TMP1, 0x20
+ | addic TMP0, TMP0, -26
+ | subfe TMP3, TMP3, TMP3
+ | rlwinm TMP3, TMP3, 0, 26, 26 // x &= 0x20.
+ | xor TMP1, TMP1, TMP3
+ | stbx TMP1, CARG2, TMP2
+ | addi TMP2, TMP2, 1
+ | b <1
+ |.endmacro
+ |
+ |ffstring_case string_lower, 65
+ |ffstring_case string_upper, 97
+ |
+ |//-- Table library ------------------------------------------------------
+ |
+ |.ffunc_1 table_getn
+ | checktab CARG3; bne ->fff_fallback
+ | bl extern lj_tab_len // (GCtab *t)
+ | // Returns uint32_t (but less than 2^31).
+ | b ->fff_resi
+ |
+ |//-- 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
+ |
+ |//-----------------------------------------------------------------------
+ |//-- 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(jit_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
+ | stw L, DISPATCH_J(L)(DISPATCH)
+ | subi CARG3, CARG3, 2
+ | stw TMP1, DISPATCH_GL(jit_L)(DISPATCH)
+ | stw CARG4, DISPATCH_J(parent)(DISPATCH)
+ | stp BASE, L->base
+ | 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
+ |1:
+ | cmpwi CARG1, 0
+ | blt >3 // Check for error from exit.
+ | lwz LFUNC:TMP1, FRAME_FUNC(BASE)
+ | slwi MULTRES, CARG1, 3
+ | li TMP2, 0
+ | stw MULTRES, SAVE_MULTRES
+ | lwz TMP1, LFUNC:TMP1->pc
+ | stw TMP2, DISPATCH_GL(jit_L)(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:
+ | subi RC, MULTRES, 8
+ | add RA, RA, BASE
+ | bctr
+ |
+ |3: // 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, TMP
<TRUNCATED>