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Posted to commits@trafficserver.apache.org by zw...@apache.org on 2015/07/23 13:14:01 UTC
[04/43] 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_ppcspe.dasc
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diff --git a/lib/luajit/src/vm_ppcspe.dasc b/lib/luajit/src/vm_ppcspe.dasc
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+|// Low-level VM code for PowerPC/e500 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.
+|
+|//-----------------------------------------------------------------------
+|
+|// Fixed register assignments for the interpreter.
+|// Don't use: r1 = sp, r2 and r13 = reserved and/or small data area ptr
+|
+|// 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.
+|
+|// Constants for vectorized type-comparisons (hi+low GPR). C callee-save.
+|.define TISNUM, r22
+|.define TISSTR, r23
+|.define TISTAB, r24
+|.define TISFUNC, r25
+|.define TISNIL, r26
+|.define TOBIT, r27
+|.define ZERO, TOBIT // Zero in lo word.
+|
+|// 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 CRET1, r3
+|.define CRET2, r4
+|
+|// Stack layout while in interpreter. Must match with lj_frame.h.
+|.define SAVE_LR, 188(sp)
+|.define CFRAME_SPACE, 184 // Delta for sp.
+|// Back chain for sp: 184(sp) <-- sp entering interpreter
+|.define SAVE_r31, 176(sp) // 64 bit register saves.
+|.define SAVE_r30, 168(sp)
+|.define SAVE_r29, 160(sp)
+|.define SAVE_r28, 152(sp)
+|.define SAVE_r27, 144(sp)
+|.define SAVE_r26, 136(sp)
+|.define SAVE_r25, 128(sp)
+|.define SAVE_r24, 120(sp)
+|.define SAVE_r23, 112(sp)
+|.define SAVE_r22, 104(sp)
+|.define SAVE_r21, 96(sp)
+|.define SAVE_r20, 88(sp)
+|.define SAVE_r19, 80(sp)
+|.define SAVE_r18, 72(sp)
+|.define SAVE_r17, 64(sp)
+|.define SAVE_r16, 56(sp)
+|.define SAVE_r15, 48(sp)
+|.define SAVE_r14, 40(sp)
+|.define SAVE_CR, 36(sp)
+|.define UNUSED1, 32(sp)
+|.define SAVE_ERRF, 28(sp) // 32 bit C frame info.
+|.define SAVE_NRES, 24(sp)
+|.define SAVE_CFRAME, 20(sp)
+|.define SAVE_L, 16(sp)
+|.define SAVE_PC, 12(sp)
+|.define SAVE_MULTRES, 8(sp)
+|// Next frame lr: 4(sp)
+|// Back chain for sp: 0(sp) <-- sp while in interpreter
+|
+|.macro save_, reg; evstdd reg, SAVE_..reg; .endmacro
+|.macro rest_, reg; evldd reg, SAVE_..reg; .endmacro
+|
+|.macro saveregs
+| stwu sp, -CFRAME_SPACE(sp)
+| save_ r14; save_ r15; save_ r16; save_ r17; save_ r18; save_ r19
+| mflr r0; mfcr r12
+| save_ r20; save_ r21; save_ r22; save_ r23; save_ r24; save_ r25
+| stw r0, SAVE_LR; stw r12, SAVE_CR
+| save_ r26; save_ r27; save_ r28; save_ r29; save_ r30; save_ r31
+|.endmacro
+|
+|.macro restoreregs
+| lwz r0, SAVE_LR; lwz r12, SAVE_CR
+| rest_ r14; rest_ r15; rest_ r16; rest_ r17; rest_ r18; rest_ r19
+| mtlr r0; mtcrf 0x38, r12
+| rest_ r20; rest_ r21; rest_ r22; rest_ r23; rest_ r24; rest_ r25
+| rest_ r26; rest_ r27; rest_ r28; rest_ r29; rest_ r30; rest_ r31
+| 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
+|
+|//-----------------------------------------------------------------------
+|
+|// 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_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.
+|.macro ins_NEXT2
+| decode_OP4 TMP1, INS
+| decode_RB8 RB, INS
+| decode_RD8 RD, INS
+| lwzx TMP0, DISPATCH, TMP1
+| decode_RA8 RA, INS
+| decode_RC8 RC, INS
+| mtctr TMP0
+| 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_OP4 TMP1, INS
+| decode_RA8 RA, INS
+| lwzx 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; evcmpltu reg, TISNUM; .endmacro
+|.macro checkstr, reg; evcmpeq reg, TISSTR; .endmacro
+|.macro checktab, reg; evcmpeq reg, TISTAB; .endmacro
+|.macro checkfunc, reg; evcmpeq reg, TISFUNC; .endmacro
+|.macro checknil, reg; evcmpeq reg, TISNIL; .endmacro
+|.macro checkok, label; blt label; .endmacro
+|.macro checkfail, label; bge label; .endmacro
+|.macro checkanyfail, label; bns label; .endmacro
+|.macro checkallok, label; bso label; .endmacro
+|
+|.macro branch_RD
+| srwi TMP0, RD, 1
+| add PC, PC, TMP0
+| addis PC, PC, -(BCBIAS_J*4 >> 16)
+|.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 hotloop
+| NYI
+|.endmacro
+|
+|.macro hotcall
+| NYI
+|.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.
+ | andi. TMP0, PC, FRAME_P
+ | evsplati 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.
+ | andi. 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.
+ | bne ->vm_returnp
+ |
+ | addic. TMP1, RD, -8
+ | stw TMP2, L->base
+ | lwz TMP2, SAVE_NRES
+ | subi BASE, BASE, 8
+ | st_vmstate
+ | slwi TMP2, TMP2, 3
+ | beq >2
+ |1:
+ | addic. TMP1, TMP1, -8
+ | evldd TMP0, 0(RA)
+ | addi RA, RA, 8
+ | evstdd TMP0, 0(BASE)
+ | addi BASE, BASE, 8
+ | bne <1
+ |
+ |2:
+ | cmpw TMP2, RD // More/less results wanted?
+ | bne >6
+ |3:
+ | stw BASE, L->top // Store new top.
+ |
+ |->vm_leave_cp:
+ | lwz TMP0, SAVE_CFRAME // Restore previous C frame.
+ | li CRET1, 0 // Ok return status for vm_pcall.
+ | stw 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
+ | evstdd TISNIL, 0(BASE)
+ | addi RD, RD, 8
+ | addi BASE, BASE, 8
+ | b <2
+ |
+ |7: // Less results wanted.
+ | sub TMP0, RD, TMP2
+ | cmpwi TMP2, 0 // LUA_MULTRET+1 case?
+ | sub TMP0, BASE, TMP0 // Subtract the difference.
+ | iseleq 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.
+ | stw BASE, L->top // Save current top held in BASE (yes).
+ | mr SAVE0, RD
+ | mr CARG2, TMP2
+ | mr CARG1, L
+ | bl extern lj_state_growstack // (lua_State *L, int n)
+ | lwz TMP2, SAVE_NRES
+ | mr RD, SAVE0
+ | slwi TMP2, TMP2, 3
+ | lwz 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
+ | 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)
+ | rlwinm sp, CARG1, 0, 0, 29
+ |->vm_unwind_ff_eh: // Landing pad for external unwinder.
+ | lwz L, SAVE_L
+ | evsplati TISNUM, LJ_TISNUM+1 // Setup type comparison constants.
+ | evsplati TISFUNC, LJ_TFUNC
+ | lus TOBIT, 0x4338
+ | evsplati TISTAB, LJ_TTAB
+ | li TMP0, 0
+ | lwz BASE, L->base
+ | evmergelo TOBIT, TOBIT, TMP0
+ | lwz DISPATCH, L->glref // Setup pointer to dispatch table.
+ | evsplati TISSTR, LJ_TSTR
+ | li TMP1, LJ_TFALSE
+ | evsplati TISNIL, LJ_TNIL
+ | li_vmstate INTERP
+ | lwz PC, FRAME_PC(BASE) // Fetch PC of previous frame.
+ | la RA, -8(BASE) // Results start at BASE-8.
+ | addi DISPATCH, DISPATCH, GG_G2DISP
+ | stw TMP1, 0(RA) // Prepend false to error message.
+ | li RD, 16 // 2 results: false + error message.
+ | st_vmstate
+ | 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
+ | stw BASE, L->base
+ | addi PC, PC, 4 // Must point after first instruction.
+ | stw 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)
+ | lwz BASE, L->base
+ | lwz 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
+ | stw TMP0, L->cframe
+ | stw 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
+ | lwz BASE, L->base
+ | evsplati TISNUM, LJ_TISNUM+1 // Setup type comparison constants.
+ | lwz TMP1, L->top
+ | evsplati TISFUNC, LJ_TFUNC
+ | lus TOBIT, 0x4338
+ | evsplati TISTAB, LJ_TTAB
+ | lwz PC, FRAME_PC(BASE)
+ | li TMP2, 0
+ | evsplati TISSTR, LJ_TSTR
+ | sub RD, TMP1, BASE
+ | evmergelo TOBIT, TOBIT, TMP2
+ | stb CARG3, L->status
+ | andi. TMP0, PC, FRAME_TYPE
+ | li_vmstate INTERP
+ | addi RD, RD, 8
+ | evsplati TISNIL, LJ_TNIL
+ | mr MULTRES, RD
+ | st_vmstate
+ | 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).
+ | lwz TMP1, L:CARG1->cframe
+ | stw CARG3, SAVE_NRES
+ | mr L, CARG1
+ | stw CARG1, SAVE_L
+ | mr BASE, CARG2
+ | stw 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.
+ | stw TMP1, SAVE_CFRAME
+ | addi DISPATCH, DISPATCH, GG_G2DISP
+ |
+ |3: // Entry point for vm_cpcall/vm_resume (BASE = base, PC = ftype).
+ | lwz TMP2, L->base // TMP2 = old base (used in vmeta_call).
+ | evsplati TISNUM, LJ_TISNUM+1 // Setup type comparison constants.
+ | lwz TMP1, L->top
+ | evsplati TISFUNC, LJ_TFUNC
+ | add PC, PC, BASE
+ | evsplati TISTAB, LJ_TTAB
+ | lus TOBIT, 0x4338
+ | li TMP0, 0
+ | sub PC, PC, TMP2 // PC = frame delta + frame type
+ | evsplati TISSTR, LJ_TSTR
+ | sub NARGS8:RC, TMP1, BASE
+ | evmergelo TOBIT, TOBIT, TMP0
+ | li_vmstate INTERP
+ | evsplati TISNIL, LJ_TNIL
+ | st_vmstate
+ |
+ |->vm_call_dispatch:
+ | // TMP2 = old base, BASE = new base, RC = nargs*8, PC = caller PC
+ | li TMP0, -8
+ | evlddx LFUNC:RB, BASE, TMP0
+ | checkfunc LFUNC:RB
+ | checkfail ->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
+ | lwz TMP1, L->top
+ | stw CARG1, SAVE_PC // Any value outside of bytecode is ok.
+ | sub TMP0, TMP0, TMP1 // Compute -savestack(L, L->top).
+ | lwz TMP1, L->cframe
+ | stw sp, L->cframe // Add our C frame to cframe chain.
+ | li TMP2, 0
+ | stw TMP0, SAVE_NRES // Neg. delta means cframe w/o frame.
+ | stw TMP2, SAVE_ERRF // No error function.
+ | stw TMP1, SAVE_CFRAME
+ | mtctr CARG4
+ | bctrl // (lua_State *L, lua_CFunction func, void *ud)
+ | mr. BASE, CRET1
+ | 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)
+ | cmplwi TMP0, 0
+ | lwz PC, -16(RB) // Restore PC from [cont|PC].
+ | beq >1
+ | subi TMP2, RD, 8
+ | lwz TMP1, LFUNC:TMP1->pc
+ | evstddx TISNIL, RA, TMP2 // Ensure one valid arg.
+ | lwz KBASE, PC2PROTO(k)(TMP1)
+ | // BASE = base, RA = resultptr, RB = meta base
+ | mtctr TMP0
+ | bctr // Jump to continuation.
+ |
+ |1: // Tail call from C function.
+ | subi TMP1, RB, 16
+ | sub RC, TMP1, BASE
+ | b ->vm_call_tail
+ |
+ |->cont_cat: // RA = resultptr, RB = meta base
+ | lwz INS, -4(PC)
+ | subi CARG2, RB, 16
+ | decode_RB8 SAVE0, INS
+ | evldd TMP0, 0(RA)
+ | add TMP1, BASE, SAVE0
+ | stw BASE, L->base
+ | cmplw TMP1, CARG2
+ | sub CARG3, CARG2, TMP1
+ | decode_RA8 RA, INS
+ | evstdd TMP0, 0(CARG2)
+ | bne ->BC_CAT_Z
+ | evstddx TMP0, BASE, RA
+ | b ->cont_nop
+ |
+ |//-- Table indexing metamethods -----------------------------------------
+ |
+ |->vmeta_tgets1:
+ | evmergelo STR:RC, TISSTR, STR:RC
+ | la CARG3, DISPATCH_GL(tmptv)(DISPATCH)
+ | decode_RB8 RB, INS
+ | evstdd STR:RC, 0(CARG3)
+ | add CARG2, BASE, RB
+ | b >1
+ |
+ |->vmeta_tgets:
+ | evmergelo TAB:RB, TISTAB, TAB:RB
+ | la CARG2, DISPATCH_GL(tmptv)(DISPATCH)
+ | evmergelo STR:RC, TISSTR, STR:RC
+ | evstdd TAB:RB, 0(CARG2)
+ | la CARG3, DISPATCH_GL(tmptv2)(DISPATCH)
+ | evstdd STR:RC, 0(CARG3)
+ | b >1
+ |
+ |->vmeta_tgetb: // TMP0 = index
+ | efdcfsi TMP0, TMP0
+ | decode_RB8 RB, INS
+ | la CARG3, DISPATCH_GL(tmptv)(DISPATCH)
+ | add CARG2, BASE, RB
+ | evstdd TMP0, 0(CARG3)
+ | b >1
+ |
+ |->vmeta_tgetv:
+ | decode_RB8 RB, INS
+ | decode_RC8 RC, INS
+ | add CARG2, BASE, RB
+ | add CARG3, BASE, RC
+ |1:
+ | stw 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
+ | evldd TMP0, 0(CRET1)
+ | evstddx TMP0, BASE, RA
+ | ins_next
+ |
+ |3: // Call __index metamethod.
+ | // BASE = base, L->top = new base, stack = cont/func/t/k
+ | subfic TMP1, BASE, FRAME_CONT
+ | lwz 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:
+ | evmergelo STR:RC, TISSTR, STR:RC
+ | la CARG3, DISPATCH_GL(tmptv)(DISPATCH)
+ | decode_RB8 RB, INS
+ | evstdd STR:RC, 0(CARG3)
+ | add CARG2, BASE, RB
+ | b >1
+ |
+ |->vmeta_tsets:
+ | evmergelo TAB:RB, TISTAB, TAB:RB
+ | la CARG2, DISPATCH_GL(tmptv)(DISPATCH)
+ | evmergelo STR:RC, TISSTR, STR:RC
+ | evstdd TAB:RB, 0(CARG2)
+ | la CARG3, DISPATCH_GL(tmptv2)(DISPATCH)
+ | evstdd STR:RC, 0(CARG3)
+ | b >1
+ |
+ |->vmeta_tsetb: // TMP0 = index
+ | efdcfsi TMP0, TMP0
+ | decode_RB8 RB, INS
+ | la CARG3, DISPATCH_GL(tmptv)(DISPATCH)
+ | add CARG2, BASE, RB
+ | evstdd TMP0, 0(CARG3)
+ | b >1
+ |
+ |->vmeta_tsetv:
+ | decode_RB8 RB, INS
+ | decode_RC8 RC, INS
+ | add CARG2, BASE, RB
+ | add CARG3, BASE, RC
+ |1:
+ | stw 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
+ | evlddx TMP0, BASE, RA
+ | beq >3
+ | // NOBARRIER: lj_meta_tset ensures the table is not black.
+ | evstdd TMP0, 0(CRET1)
+ | ins_next
+ |
+ |3: // Call __newindex metamethod.
+ | // BASE = base, L->top = new base, stack = cont/func/t/k/(v)
+ | subfic TMP1, BASE, FRAME_CONT
+ | lwz 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)
+ | evstdd TMP0, 16(BASE) // Copy value to third argument.
+ | b ->vm_call_dispatch_f
+ |
+ |//-- Comparison metamethods ---------------------------------------------
+ |
+ |->vmeta_comp:
+ | mr CARG1, L
+ | subi PC, PC, 4
+ | add CARG2, BASE, RA
+ | stw PC, SAVE_PC
+ | add CARG3, BASE, RD
+ | stw 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
+ |4:
+ | lwz INS, 0(PC)
+ | addi PC, PC, 4
+ | decode_RD4 TMP2, INS
+ | addis TMP3, PC, -(BCBIAS_J*4 >> 16)
+ | add TMP2, TMP2, TMP3
+ | isellt PC, PC, TMP2
+ |->cont_nop:
+ | ins_next
+ |
+ |->cont_ra: // RA = resultptr
+ | lwz INS, -4(PC)
+ | evldd TMP0, 0(RA)
+ | decode_RA8 TMP1, INS
+ | evstddx TMP0, BASE, TMP1
+ | b ->cont_nop
+ |
+ |->cont_condt: // RA = resultptr
+ | lwz TMP0, 0(RA)
+ | li TMP1, LJ_TTRUE
+ | cmplw TMP1, TMP0 // Branch if result is true.
+ | b <4
+ |
+ |->cont_condf: // RA = resultptr
+ | lwz TMP0, 0(RA)
+ | li TMP1, LJ_TFALSE
+ | cmplw TMP0, TMP1 // Branch if result is false.
+ | b <4
+ |
+ |->vmeta_equal:
+ | // CARG2, CARG3, CARG4 are already set by BC_ISEQV/BC_ISNEV.
+ | subi PC, PC, 4
+ | stw 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
+ |
+ |//-- Arithmetic metamethods ---------------------------------------------
+ |
+ |->vmeta_arith_vn:
+ | add CARG3, BASE, RB
+ | add CARG4, KBASE, RC
+ | b >1
+ |
+ |->vmeta_arith_nv:
+ | add CARG3, KBASE, RC
+ | add CARG4, BASE, RB
+ | b >1
+ |
+ |->vmeta_unm:
+ | add CARG3, BASE, RD
+ | mr CARG4, CARG3
+ | b >1
+ |
+ |->vmeta_arith_vv:
+ | add CARG3, BASE, RB
+ | add CARG4, BASE, RC
+ |1:
+ | add CARG2, BASE, RA
+ | stw 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
+ | add CARG2, BASE, RD
+ | stw 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
+ | stw 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
+ | stw 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
+ | stw 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
+ | beq =>BC_JFORI
+ |.endif
+ | b =>BC_FORI
+ |
+ |//-----------------------------------------------------------------------
+ |//-- Fast functions -----------------------------------------------------
+ |//-----------------------------------------------------------------------
+ |
+ |.macro .ffunc, name
+ |->ff_ .. name:
+ |.endmacro
+ |
+ |.macro .ffunc_1, name
+ |->ff_ .. name:
+ | cmplwi NARGS8:RC, 8
+ | evldd CARG1, 0(BASE)
+ | blt ->fff_fallback
+ |.endmacro
+ |
+ |.macro .ffunc_2, name
+ |->ff_ .. name:
+ | cmplwi NARGS8:RC, 16
+ | evldd CARG1, 0(BASE)
+ | evldd CARG2, 8(BASE)
+ | blt ->fff_fallback
+ |.endmacro
+ |
+ |.macro .ffunc_n, name
+ | .ffunc_1 name
+ | checknum CARG1
+ | checkfail ->fff_fallback
+ |.endmacro
+ |
+ |.macro .ffunc_nn, name
+ | .ffunc_2 name
+ | evmergehi TMP0, CARG1, CARG2
+ | checknum TMP0
+ | checkanyfail ->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 assert
+ | cmplwi NARGS8:RC, 8
+ | evldd TMP0, 0(BASE)
+ | blt ->fff_fallback
+ | evaddw TMP1, TISNIL, TISNIL // Synthesize LJ_TFALSE.
+ | la RA, -8(BASE)
+ | evcmpltu cr1, TMP0, TMP1
+ | lwz PC, FRAME_PC(BASE)
+ | bge cr1, ->fff_fallback
+ | evstdd TMP0, 0(RA)
+ | addi RD, NARGS8:RC, 8 // Compute (nresults+1)*8.
+ | beq ->fff_res // Done if exactly 1 argument.
+ | li TMP1, 8
+ | subi RC, RC, 8
+ |1:
+ | cmplw TMP1, RC
+ | evlddx TMP0, BASE, TMP1
+ | evstddx TMP0, RA, TMP1
+ | addi TMP1, TMP1, 8
+ | bne <1
+ | b ->fff_res
+ |
+ |.ffunc type
+ | cmplwi NARGS8:RC, 8
+ | lwz CARG1, 0(BASE)
+ | blt ->fff_fallback
+ | li TMP2, ~LJ_TNUMX
+ | cmplw CARG1, TISNUM
+ | not TMP1, CARG1
+ | isellt TMP1, TMP2, TMP1
+ | slwi TMP1, TMP1, 3
+ | la TMP2, CFUNC:RB->upvalue
+ | evlddx STR:CRET1, TMP2, TMP1
+ | b ->fff_restv
+ |
+ |//-- Base library: getters and setters ---------------------------------
+ |
+ |.ffunc_1 getmetatable
+ | checktab CARG1
+ | evmergehi TMP1, CARG1, CARG1
+ | checkfail >6
+ |1: // Field metatable must be at same offset for GCtab and GCudata!
+ | lwz TAB:RB, TAB:CARG1->metatable
+ |2:
+ | evmr CRET1, TISNIL
+ | cmplwi TAB:RB, 0
+ | lwz STR:RC, DISPATCH_GL(gcroot[GCROOT_MMNAME+MM_metatable])(DISPATCH)
+ | beq ->fff_restv
+ | lwz TMP0, TAB:RB->hmask
+ | evmergelo CRET1, TISTAB, TAB:RB // Use metatable as default result.
+ | lwz TMP1, STR:RC->hash
+ | lwz NODE:TMP2, TAB:RB->node
+ | evmergelo STR:RC, TISSTR, STR:RC
+ | 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.
+ | evldd TMP0, NODE:TMP2->key
+ | evldd TMP1, NODE:TMP2->val
+ | evcmpeq TMP0, STR:RC
+ | lwz NODE:TMP2, NODE:TMP2->next
+ | checkallok >5
+ | cmplwi NODE:TMP2, 0
+ | beq ->fff_restv // Not found, keep default result.
+ | b <3
+ |5:
+ | checknil TMP1
+ | checkok ->fff_restv // Ditto for nil value.
+ | evmr CRET1, TMP1 // Return value of mt.__metatable.
+ | b ->fff_restv
+ |
+ |6:
+ | cmpwi TMP1, LJ_TUDATA
+ | not TMP1, TMP1
+ | beq <1
+ | checknum CARG1
+ | slwi TMP1, TMP1, 2
+ | li TMP2, 4*~LJ_TNUMX
+ | isellt TMP1, TMP2, TMP1
+ | la TMP2, DISPATCH_GL(gcroot[GCROOT_BASEMT])(DISPATCH)
+ | lwzx TAB:RB, TMP2, TMP1
+ | b <2
+ |
+ |.ffunc_2 setmetatable
+ | // Fast path: no mt for table yet and not clearing the mt.
+ | evmergehi TMP0, TAB:CARG1, TAB:CARG2
+ | checktab TMP0
+ | checkanyfail ->fff_fallback
+ | lwz TAB:TMP1, TAB:CARG1->metatable
+ | cmplwi TAB:TMP1, 0
+ | lbz TMP3, TAB:CARG1->marked
+ | bne ->fff_fallback
+ | andi. 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
+ | evldd CARG2, 0(BASE)
+ | blt ->fff_fallback
+ | checktab CARG2
+ | la CARG3, 8(BASE)
+ | checkfail ->fff_fallback
+ | mr CARG1, L
+ | bl extern lj_tab_get // (lua_State *L, GCtab *t, cTValue *key)
+ | // Returns cTValue *.
+ | evldd CRET1, 0(CRET1)
+ | b ->fff_restv
+ |
+ |//-- Base library: conversions ------------------------------------------
+ |
+ |.ffunc tonumber
+ | // Only handles the number case inline (without a base argument).
+ | cmplwi NARGS8:RC, 8
+ | evldd CARG1, 0(BASE)
+ | bne ->fff_fallback // Exactly one argument.
+ | checknum CARG1
+ | checkok ->fff_restv
+ | b ->fff_fallback
+ |
+ |.ffunc_1 tostring
+ | // Only handles the string or number case inline.
+ | checkstr CARG1
+ | // A __tostring method in the string base metatable is ignored.
+ | checkok ->fff_restv // String key?
+ | // Handle numbers inline, unless a number base metatable is present.
+ | lwz TMP0, DISPATCH_GL(gcroot[GCROOT_BASEMT_NUM])(DISPATCH)
+ | checknum CARG1
+ | cmplwi cr1, TMP0, 0
+ | stw BASE, L->base // Add frame since C call can throw.
+ | crand 4*cr0+eq, 4*cr0+lt, 4*cr1+eq
+ | stw PC, SAVE_PC // Redundant (but a defined value).
+ | bne ->fff_fallback
+ | ffgccheck
+ | mr CARG1, L
+ | mr CARG2, BASE
+ | bl extern lj_str_fromnum // (lua_State *L, lua_Number *np)
+ | // Returns GCstr *.
+ | evmergelo STR:CRET1, TISSTR, STR:CRET1
+ | b ->fff_restv
+ |
+ |//-- Base library: iterators -------------------------------------------
+ |
+ |.ffunc next
+ | cmplwi NARGS8:RC, 8
+ | evldd CARG2, 0(BASE)
+ | blt ->fff_fallback
+ | evstddx TISNIL, BASE, NARGS8:RC // Set missing 2nd arg to nil.
+ | checktab TAB:CARG2
+ | lwz PC, FRAME_PC(BASE)
+ | checkfail ->fff_fallback
+ | stw BASE, L->base // Add frame since C call can throw.
+ | mr CARG1, L
+ | stw 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
+ | evmr CRET1, TISNIL
+ | beq ->fff_restv // End of traversal: return nil.
+ | evldd TMP0, 8(BASE) // Copy key and value to results.
+ | la RA, -8(BASE)
+ | evldd TMP1, 16(BASE)
+ | evstdd TMP0, 0(RA)
+ | li RD, (2+1)*8
+ | evstdd TMP1, 8(RA)
+ | b ->fff_res
+ |
+ |.ffunc_1 pairs
+ | checktab TAB:CARG1
+ | lwz PC, FRAME_PC(BASE)
+ | checkfail ->fff_fallback
+#if LJ_52
+ | lwz TAB:TMP2, TAB:CARG1->metatable
+ | evldd CFUNC:TMP0, CFUNC:RB->upvalue[0]
+ | cmplwi TAB:TMP2, 0
+ | la RA, -8(BASE)
+ | bne ->fff_fallback
+#else
+ | evldd CFUNC:TMP0, CFUNC:RB->upvalue[0]
+ | la RA, -8(BASE)
+#endif
+ | evstdd TISNIL, 8(BASE)
+ | li RD, (3+1)*8
+ | evstdd CFUNC:TMP0, 0(RA)
+ | b ->fff_res
+ |
+ |.ffunc_2 ipairs_aux
+ | checktab TAB:CARG1
+ | lwz PC, FRAME_PC(BASE)
+ | checkfail ->fff_fallback
+ | checknum CARG2
+ | lus TMP3, 0x3ff0
+ | checkfail ->fff_fallback
+ | efdctsi TMP2, CARG2
+ | lwz TMP0, TAB:CARG1->asize
+ | evmergelo TMP3, TMP3, ZERO
+ | lwz TMP1, TAB:CARG1->array
+ | efdadd CARG2, CARG2, TMP3
+ | addi TMP2, TMP2, 1
+ | la RA, -8(BASE)
+ | cmplw TMP0, TMP2
+ | slwi TMP3, TMP2, 3
+ | evstdd CARG2, 0(RA)
+ | ble >2 // Not in array part?
+ | evlddx TMP1, TMP1, TMP3
+ |1:
+ | checknil TMP1
+ | li RD, (0+1)*8
+ | checkok ->fff_res // End of iteration, return 0 results.
+ | li RD, (2+1)*8
+ | evstdd TMP1, 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
+ | evldd TMP1, 0(CRET1)
+ | b <1
+ |
+ |.ffunc_1 ipairs
+ | checktab TAB:CARG1
+ | lwz PC, FRAME_PC(BASE)
+ | checkfail ->fff_fallback
+#if LJ_52
+ | lwz TAB:TMP2, TAB:CARG1->metatable
+ | evldd CFUNC:TMP0, CFUNC:RB->upvalue[0]
+ | cmplwi TAB:TMP2, 0
+ | la RA, -8(BASE)
+ | bne ->fff_fallback
+#else
+ | evldd CFUNC:TMP0, CFUNC:RB->upvalue[0]
+ | la RA, -8(BASE)
+#endif
+ | evsplati TMP1, 0
+ | li RD, (3+1)*8
+ | evstdd TMP1, 8(BASE)
+ | evstdd CFUNC:TMP0, 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_2 xpcall
+ | lbz TMP3, DISPATCH_GL(hookmask)(DISPATCH)
+ | mr TMP2, BASE
+ | checkfunc CARG2 // Traceback must be a function.
+ | checkfail ->fff_fallback
+ | la BASE, 16(BASE)
+ | // Remember active hook before pcall.
+ | rlwinm TMP3, TMP3, 32-HOOK_ACTIVE_SHIFT, 31, 31
+ | evstdd CARG2, 0(TMP2) // Swap function and traceback.
+ | subi NARGS8:RC, NARGS8:RC, 16
+ | evstdd CARG1, 8(TMP2)
+ | addi PC, TMP3, 16+FRAME_PCALL
+ | b ->vm_call_dispatch
+ |
+ |//-- Coroutine library --------------------------------------------------
+ |
+ |.macro coroutine_resume_wrap, resume
+ |.if resume
+ |.ffunc_1 coroutine_resume
+ | evmergehi TMP0, L:CARG1, L:CARG1
+ |.else
+ |.ffunc coroutine_wrap_aux
+ | lwz L:CARG1, CFUNC:RB->upvalue[0].gcr
+ |.endif
+ |.if resume
+ | cmpwi TMP0, LJ_TTHREAD
+ | bne ->fff_fallback
+ |.endif
+ | lbz TMP0, L:CARG1->status
+ | lwz TMP1, L:CARG1->cframe
+ | lwz CARG2, L:CARG1->top
+ | cmplwi cr0, TMP0, LUA_YIELD
+ | lwz 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
+ | stw 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
+ | stw TMP2, L:CARG1->top
+ | li TMP1, 0
+ | stw BASE, L->top
+ |2: // Move args to coroutine.
+ | cmpw TMP1, NARGS8:RC
+ | evlddx TMP0, BASE, TMP1
+ | beq >3
+ | evstddx TMP0, 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:
+ | lwz TMP2, L:SAVE0->base
+ | cmplwi CRET1, LUA_YIELD
+ | lwz TMP3, L:SAVE0->top
+ | li_vmstate INTERP
+ | lwz 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
+ | stw TMP2, L:SAVE0->top // Clear coroutine stack.
+ |5: // Move results from coroutine.
+ | cmplw TMP1, TMP3
+ | evlddx TMP0, TMP2, TMP1
+ | evstddx TMP0, BASE, TMP1
+ | addi TMP1, TMP1, 8
+ | bne <5
+ |6:
+ | andi. 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
+ | andi. TMP0, PC, FRAME_TYPE
+ | la TMP3, -8(TMP3)
+ | li TMP1, LJ_TFALSE
+ | evldd TMP0, 0(TMP3)
+ | stw 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)
+ | evstdd TMP0, 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
+ | lwz TMP0, L->cframe
+ | add TMP1, BASE, NARGS8:RC
+ | stw BASE, L->base
+ | andi. TMP0, TMP0, CFRAME_RESUME
+ | stw TMP1, L->top
+ | li CRET1, LUA_YIELD
+ | beq ->fff_fallback
+ | stw ZERO, L->cframe
+ | stb CRET1, L->status
+ | b ->vm_leave_unw
+ |
+ |//-- Math library -------------------------------------------------------
+ |
+ |.ffunc_n math_abs
+ | efdabs CRET1, CARG1
+ | // Fallthrough.
+ |
+ |->fff_restv:
+ | // CRET1 = TValue result.
+ | lwz PC, FRAME_PC(BASE)
+ | la RA, -8(BASE)
+ | evstdd CRET1, 0(RA)
+ |->fff_res1:
+ | // RA = results, PC = return.
+ | li RD, (1+1)*8
+ |->fff_res:
+ | // RA = results, RD = (nresults+1)*8, PC = return.
+ | andi. TMP0, PC, FRAME_TYPE
+ | mr MULTRES, RD
+ | bne ->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
+ | evstddx TISNIL, RA, TMP1
+ | b <5
+ |
+ |.macro math_extern, func
+ | .ffunc math_ .. func
+ | cmplwi NARGS8:RC, 8
+ | evldd CARG2, 0(BASE)
+ | blt ->fff_fallback
+ | checknum CARG2
+ | evmergehi CARG1, CARG2, CARG2
+ | checkfail ->fff_fallback
+ | bl extern func@plt
+ | evmergelo CRET1, CRET1, CRET2
+ | b ->fff_restv
+ |.endmacro
+ |
+ |.macro math_extern2, func
+ | .ffunc math_ .. func
+ | cmplwi NARGS8:RC, 16
+ | evldd CARG2, 0(BASE)
+ | evldd CARG4, 8(BASE)
+ | blt ->fff_fallback
+ | evmergehi CARG1, CARG4, CARG2
+ | checknum CARG1
+ | evmergehi CARG3, CARG4, CARG4
+ | checkanyfail ->fff_fallback
+ | bl extern func@plt
+ | evmergelo CRET1, CRET1, CRET2
+ | b ->fff_restv
+ |.endmacro
+ |
+ |.macro math_round, func
+ | .ffunc math_ .. func
+ | cmplwi NARGS8:RC, 8
+ | evldd CARG2, 0(BASE)
+ | blt ->fff_fallback
+ | checknum CARG2
+ | evmergehi CARG1, CARG2, CARG2
+ | checkfail ->fff_fallback
+ | lwz PC, FRAME_PC(BASE)
+ | bl ->vm_..func.._hilo;
+ | la RA, -8(BASE)
+ | evstdd CRET2, 0(RA)
+ | b ->fff_res1
+ |.endmacro
+ |
+ | math_round floor
+ | math_round ceil
+ |
+ | math_extern sqrt
+ |
+ |.ffunc math_log
+ | cmplwi NARGS8:RC, 8
+ | evldd CARG2, 0(BASE)
+ | bne ->fff_fallback // Need exactly 1 argument.
+ | checknum CARG2
+ | evmergehi CARG1, CARG2, CARG2
+ | checkfail ->fff_fallback
+ | bl extern log@plt
+ | evmergelo CRET1, CRET1, CRET2
+ | b ->fff_restv
+ |
+ | 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
+ | evldd CARG2, CFUNC:RB->upvalue[0]
+ | efdmul CRET1, CARG1, CARG2
+ | b ->fff_restv
+ |
+ |.ffunc math_ldexp
+ | cmplwi NARGS8:RC, 16
+ | evldd CARG2, 0(BASE)
+ | evldd CARG4, 8(BASE)
+ | blt ->fff_fallback
+ | evmergehi CARG1, CARG4, CARG2
+ | checknum CARG1
+ | checkanyfail ->fff_fallback
+ | efdctsi CARG3, CARG4
+ | bl extern ldexp@plt
+ | evmergelo CRET1, CRET1, CRET2
+ | b ->fff_restv
+ |
+ |.ffunc math_frexp
+ | cmplwi NARGS8:RC, 8
+ | evldd CARG2, 0(BASE)
+ | blt ->fff_fallback
+ | checknum CARG2
+ | evmergehi CARG1, CARG2, CARG2
+ | checkfail ->fff_fallback
+ | la CARG3, DISPATCH_GL(tmptv)(DISPATCH)
+ | lwz PC, FRAME_PC(BASE)
+ | bl extern frexp@plt
+ | lwz TMP1, DISPATCH_GL(tmptv)(DISPATCH)
+ | evmergelo CRET1, CRET1, CRET2
+ | efdcfsi CRET2, TMP1
+ | la RA, -8(BASE)
+ | evstdd CRET1, 0(RA)
+ | li RD, (2+1)*8
+ | evstdd CRET2, 8(RA)
+ | b ->fff_res
+ |
+ |.ffunc math_modf
+ | cmplwi NARGS8:RC, 8
+ | evldd CARG2, 0(BASE)
+ | blt ->fff_fallback
+ | checknum CARG2
+ | evmergehi CARG1, CARG2, CARG2
+ | checkfail ->fff_fallback
+ | la CARG3, -8(BASE)
+ | lwz PC, FRAME_PC(BASE)
+ | bl extern modf@plt
+ | evmergelo CRET1, CRET1, CRET2
+ | la RA, -8(BASE)
+ | evstdd CRET1, 0(BASE)
+ | li RD, (2+1)*8
+ | b ->fff_res
+ |
+ |.macro math_minmax, name, cmpop
+ | .ffunc_1 name
+ | checknum CARG1
+ | li TMP1, 8
+ | checkfail ->fff_fallback
+ |1:
+ | evlddx CARG2, BASE, TMP1
+ | cmplw cr1, TMP1, NARGS8:RC
+ | checknum CARG2
+ | bge cr1, ->fff_restv // Ok, since CRET1 = CARG1.
+ | checkfail ->fff_fallback
+ | cmpop CARG2, CARG1
+ | addi TMP1, TMP1, 8
+ | crmove 4*cr0+lt, 4*cr0+gt
+ | evsel CARG1, CARG2, CARG1
+ | b <1
+ |.endmacro
+ |
+ | math_minmax math_min, efdtstlt
+ | math_minmax math_max, efdtstgt
+ |
+ |//-- String library -----------------------------------------------------
+ |
+ |.ffunc_1 string_len
+ | checkstr STR:CARG1
+ | checkfail ->fff_fallback
+ | lwz TMP0, STR:CARG1->len
+ | efdcfsi CRET1, TMP0
+ | b ->fff_restv
+ |
+ |.ffunc string_byte // Only handle the 1-arg case here.
+ | cmplwi NARGS8:RC, 8
+ | evldd STR:CARG1, 0(BASE)
+ | bne ->fff_fallback // Need exactly 1 argument.
+ | checkstr STR:CARG1
+ | la RA, -8(BASE)
+ | checkfail ->fff_fallback
+ | lwz TMP0, STR:CARG1->len
+ | li RD, (0+1)*8
+ | lbz TMP1, STR:CARG1[1] // Access is always ok (NUL at end).
+ | li TMP2, (1+1)*8
+ | cmplwi TMP0, 0
+ | lwz PC, FRAME_PC(BASE)
+ | efdcfsi CRET1, TMP1
+ | iseleq RD, RD, TMP2
+ | evstdd CRET1, 0(RA)
+ | b ->fff_res
+ |
+ |.ffunc string_char // Only handle the 1-arg case here.
+ | ffgccheck
+ | cmplwi NARGS8:RC, 8
+ | evldd CARG1, 0(BASE)
+ | bne ->fff_fallback // Exactly 1 argument.
+ | checknum CARG1
+ | la CARG2, DISPATCH_GL(tmptv)(DISPATCH)
+ | checkfail ->fff_fallback
+ | efdctsiz TMP0, CARG1
+ | li CARG3, 1
+ | cmplwi TMP0, 255
+ | stb TMP0, 0(CARG2)
+ | bgt ->fff_fallback
+ |->fff_newstr:
+ | mr CARG1, L
+ | stw BASE, L->base
+ | stw PC, SAVE_PC
+ | bl extern lj_str_new // (lua_State *L, char *str, size_t l)
+ | // Returns GCstr *.
+ | lwz BASE, L->base
+ | evmergelo STR:CRET1, TISSTR, STR:CRET1
+ | b ->fff_restv
+ |
+ |.ffunc string_sub
+ | ffgccheck
+ | cmplwi NARGS8:RC, 16
+ | evldd CARG3, 16(BASE)
+ | evldd STR:CARG1, 0(BASE)
+ | blt ->fff_fallback
+ | evldd CARG2, 8(BASE)
+ | li TMP2, -1
+ | beq >1
+ | checknum CARG3
+ | checkfail ->fff_fallback
+ | efdctsiz TMP2, CARG3
+ |1:
+ | checknum CARG2
+ | checkfail ->fff_fallback
+ | checkstr STR:CARG1
+ | efdctsiz TMP1, CARG2
+ | checkfail ->fff_fallback
+ | lwz TMP0, STR:CARG1->len
+ | cmplw TMP0, TMP2 // len < end? (unsigned compare)
+ | add TMP3, TMP2, TMP0
+ | 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
+ | addi CARG3, CARG3, 1
+ | add CARG2, CARG2, TMP1
+ | isellt CARG3, r0, CARG3
+ | b ->fff_newstr
+ |
+ |5: // Negative end or overflow.
+ | cmpw TMP0, TMP2
+ | addi TMP3, TMP3, 1
+ | iselgt TMP2, TMP3, TMP0 // end = end > len ? len : end+len+1
+ | b <2
+ |
+ |7: // Negative start or underflow.
+ | cmpwi cr1, TMP3, 0
+ | iseleq TMP1, r0, TMP3
+ | isel TMP1, r0, TMP1, 4*cr1+lt
+ | 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
+ | evldd CARG1, 0(BASE)
+ | evldd CARG2, 8(BASE)
+ | bne ->fff_fallback // Exactly 2 arguments.
+ | checknum CARG2
+ | checkfail ->fff_fallback
+ | checkstr STR:CARG1
+ | efdctsiz CARG3, CARG2
+ | checkfail ->fff_fallback
+ | 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]
+ | lwz 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:CRET1, DISPATCH_GL(strempty)(DISPATCH)
+ | evmergelo CRET1, TISSTR, STR:CRET1
+ | b ->fff_restv
+ |
+ |.ffunc string_reverse
+ | ffgccheck
+ | cmplwi NARGS8:RC, 8
+ | evldd CARG1, 0(BASE)
+ | blt ->fff_fallback
+ | checkstr STR:CARG1
+ | lwz TMP1, DISPATCH_GL(tmpbuf.sz)(DISPATCH)
+ | checkfail ->fff_fallback
+ | lwz CARG3, STR:CARG1->len
+ | la CARG1, #STR(STR:CARG1)
+ | lwz 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
+ | blt ->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
+ | evldd CARG1, 0(BASE)
+ | blt ->fff_fallback
+ | checkstr STR:CARG1
+ | lwz TMP1, DISPATCH_GL(tmpbuf.sz)(DISPATCH)
+ | checkfail ->fff_fallback
+ | lwz CARG3, STR:CARG1->len
+ | la CARG1, #STR(STR:CARG1)
+ | lwz 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
+ | bge ->fff_newstr
+ | subi TMP0, TMP1, lo
+ | xori TMP3, TMP1, 0x20
+ | cmplwi TMP0, 26
+ | isellt TMP1, TMP3, TMP1
+ | 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 CARG1
+ | checkfail ->fff_fallback
+ | bl extern lj_tab_len // (GCtab *t)
+ | // Returns uint32_t (but less than 2^31).
+ | efdcfsi CRET1, CRET1
+ | b ->fff_restv
+ |
+ |//-- Bit library --------------------------------------------------------
+ |
+ |.macro .ffunc_bit, name
+ | .ffunc_n bit_..name
+ | efdadd CARG1, CARG1, TOBIT
+ |.endmacro
+ |
+ |.ffunc_bit tobit
+ |->fff_resbit:
+ | efdcfsi CRET1, CARG1
+ | b ->fff_restv
+ |
+ |.macro .ffunc_bit_op, name, ins
+ | .ffunc_bit name
+ | li TMP1, 8
+ |1:
+ | evlddx CARG2, BASE, TMP1
+ | cmplw cr1, TMP1, NARGS8:RC
+ | checknum CARG2
+ | bge cr1, ->fff_resbit
+ | checkfail ->fff_fallback
+ | efdadd CARG2, CARG2, TOBIT
+ | 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
+ | efdcfsi CRET1, TMP0
+ | b ->fff_restv
+ |
+ |.ffunc_bit bnot
+ | not TMP0, CARG1
+ | efdcfsi CRET1, TMP0
+ | b ->fff_restv
+ |
+ |.macro .ffunc_bit_sh, name, ins, shmod
+ | .ffunc_nn bit_..name
+ | efdadd CARG2, CARG2, TOBIT
+ | efdadd CARG1, CARG1, TOBIT
+ |.if shmod == 1
+ | rlwinm CARG2, CARG2, 0, 27, 31
+ |.elif shmod == 2
+ | neg CARG2, CARG2
+ |.endif
+ | ins TMP0, CARG1, CARG2
+ | efdcfsi CRET1, TMP0
+ | b ->fff_restv
+ |.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
+ |
+ |//-----------------------------------------------------------------------
+ |
+ |->fff_fallback: // Call fast function fallback handler.
+ | // BASE = new base, RB = CFUNC, RC = nargs*8
+ | lwz 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).
+ | cmplw TMP0, TMP2
+ | stw BASE, L->base
+ | stw 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.
+ | lwz 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.
+ | lwz 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:
+ | andi. 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)
+ | lwz 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
+ | stw BASE, L->base
+ | add TMP0, BASE, NARGS8:RC
+ | stw PC, SAVE_PC // Redundant (but a defined value).
+ | stw TMP0, L->top
+ | mr CARG1, L
+ | bl extern lj_gc_step // (lua_State *L)
+ | lwz BASE, L->base
+ | mtlr SAVE0
+ | lwz 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
+ | NYI
+ |.endif
+ |
+ |->vm_rethook: // Dispatch target for return hooks.
+ | lbz TMP3, DISPATCH_GL(hookmask)(DISPATCH)
+ | andi. TMP0, TMP3, HOOK_ACTIVE // Hook already active?
+ | beq >1
+ |5: // Re-dispatch to static ins.
+ | addi TMP1, TMP1, GG_DISP2STATIC // Assumes decode_OP4 TMP1, INS.
+ | lwzx 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)
+ | andi. 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
+ | stw 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:
+ | lwz BASE, L->base
+ |4: // Re-dispatch to static ins.
+ | lwz INS, -4(PC)
+ | decode_OP4 TMP1, INS
+ | decode_RB8 RB, INS
+ | addi TMP1, TMP1, GG_DISP2STATIC
+ | decode_RD8 RD, INS
+ | lwzx 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
+ | NYI
+ |.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
+ | stw BASE, L->base
+ | sub RA, RA, BASE
+ | stw TMP0, L->top
+ | bl extern lj_dispatch_call // (lua_State *L, const BCIns *pc)
+ | // Returns ASMFunction.
+ | lwz BASE, L->base
+ | lwz 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)
+ | mtctr CRET1
+ | bctr
+ |
+ |//-----------------------------------------------------------------------
+ |//-- Trace exit handler -------------------------------------------------
+ |//-----------------------------------------------------------------------
+ |
+ |->vm_exit_handler:
+ |.if JIT
+ | NYI
+ |.endif
+ |->vm_exit_interp:
+ |.if JIT
+ | NYI
+ |.endif
+ |
+ |//-----------------------------------------------------------------------
+ |//-- Math helper functions ----------------------------------------------
+ |//-----------------------------------------------------------------------
+ |
+ |// FP value rounding. Called by math.floor/math.ceil fast functions
+ |// and from JIT code.
+ |//
+ |// This can be inlined if the CPU has the frin/friz/frip/frim instructions.
+ |// The alternative hard-float approaches have a deep dependency chain.
+ |// The resulting latency is at least 3x-7x the double-precision FP latency
+ |// (e500v2: 6cy, e600: 5cy, Cell: 10cy) or around 20-70 cycles.
+ |//
+ |// The soft-float approach is tedious, but much faster (e500v2: ~11cy/~6cy).
+ |// However it relies on a fast way to transfer the FP value to GPRs
+ |// (e500v2: 0cy for lo-word, 1cy for hi-word).
+ |//
+ |.macro vm_round, name, mode
+ | // Used temporaries: TMP0, TMP1, TMP2, TMP3.
+ |->name.._efd: // Input: CARG2, output: CRET2
+ | evmergehi CARG1, CARG2, CARG2
+ |->name.._hilo:
+ | // Input: CARG1 (hi), CARG2 (hi, lo), output: CRET2
+ | rlwinm TMP2, CARG1, 12, 21, 31
+ | addic. TMP2, TMP2, -1023 // exp = exponent(x) - 1023
+ | li TMP1, -1
+ | cmplwi cr1, TMP2, 51 // 0 <= exp <= 51?
+ | subfic TMP0, TMP2, 52
+ | bgt cr1, >1
+ | lus TMP3, 0xfff0
+ | slw TMP0, TMP1, TMP0 // lomask = -1 << (52-exp)
+ | sraw TMP1, TMP3, TMP2 // himask = (int32_t)0xfff00000 >> exp
+ |.if mode == 2 // trunc(x):
+ | evmergelo TMP0, TMP1, TMP0
+ | evand CRET2, CARG2, TMP0 // hi &= himask, lo &= lomask
+ |.else
+ | andc TMP2, CARG2, TMP0
+ | andc TMP3, CARG1, TMP1
+ | or TMP2, TMP2, TMP3 // ztest = (hi&~himask) | (lo&~lomask)
+ | srawi TMP3, CARG1, 31 // signmask = (int32_t)hi >> 31
+ |.if mode == 0 // floor(x):
+ | and. TMP2, TMP2, TMP3 // iszero = ((ztest & signmask) == 0)
+ |.else // ceil(x):
+ | andc. TMP2, TMP2, TMP3 // iszero = ((ztest & ~signmask) == 0)
+ |.endif
+ | and CARG2, CARG2, TMP0 // lo &= lomask
+ | and CARG1, CARG1, TMP1 // hi &= himask
+ | subc TMP0, CARG2, TMP0
+ | iseleq TMP0, CARG2, TMP0 // lo = iszero ? lo : lo-lomask
+ | sube TMP1, CARG1, TMP1
+ | iseleq TMP1, CARG1, TMP1 // hi = iszero ? hi : hi-himask+carry
+ | evmergelo CRET2, TMP1, TMP0
+ |.endif
+ | blr
+ |1:
+ | bgtlr // Already done if >=2^52, +-inf or nan.
+ |.if mode == 2 // trunc(x):
+ | rlwinm TMP1, CARG1, 0, 0, 0 // hi = sign(x)
+ | li TMP0, 0
+ | evmergelo CRET2, TMP1, TMP0
+ |.else
+ | rlwinm TMP2, CARG1, 0, 1, 31
+ | srawi TMP0, CARG1, 31 // signmask = (int32_t)hi >> 31
+ | or TMP2, TMP2, CARG2 // ztest = abs(hi) | lo
+ | lus TMP1, 0x3ff0
+ |.if mode == 0 // floor(x):
+ | and. TMP2, TMP2, TMP0 // iszero = ((ztest & signmask) == 0)
+ |.else // ceil(x):
+ | andc. TMP2, TMP2, TMP0 // iszero = ((ztest & ~signmask) == 0)
+ |.endif
+ | li TMP0, 0
+ | iseleq TMP1, r0, TMP1
+ | rlwimi CARG1, TMP1, 0, 1, 31 // hi = sign(x) | (iszero ? 0.0 : 1.0)
+ | evmergelo CRET2, CARG1, TMP0
+ |.endif
+ | blr
+ |.endmacro
+ |
+ |->vm_floor:
+ | mflr CARG3
+ | evmergelo CARG2, CARG1, CARG2
+ | bl ->vm_floor_hilo
+ | mtlr CARG3
+ | evmergehi CRET1, CRET2, CRET2
+ | blr
+ |
+ | vm_round vm_floor, 0
+ | vm_round vm_ceil, 1
+ |.if JIT
+ | vm_round vm_trunc, 2
+ |.else
+ |->vm_trunc_efd:
+ |->vm_trunc_hilo:
+ |.endif
+ |
+ |//-----------------------------------------------------------------------
+ |//-- Miscellaneous functions --------------------------------------------
+ |//-----------------------------------------------------------------------
+ |
+ |//-----------------------------------------------------------------------
+ |//-- FFI helper functions -----------------------------------------------
+ |//-----------------------------------------------------------------------
+ |
+ |->vm_ffi_call:
+ |.if FFI
+ | NYI
+ |.endif
+ |
+ |//-----------------------------------------------------------------------
+}
+
+/* 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
+ | evlddx TMP0, BASE, RA
+ | addi PC, PC, 4
+ | evlddx TMP1, BASE, RD
+ | addis TMP3, PC, -(BCBIAS_J*4 >> 16)
+ | lwz TMP2, -4(PC)
+ | evmergehi RB, TMP0, TMP1
+ | decode_RD4 TMP2, TMP2
+ | checknum RB
+ | add TMP2, TMP2, TMP3
+ | checkanyfail ->vmeta_comp
+ | efdcmplt TMP0, TMP1
+ if (op == BC_ISLE || op == BC_ISGT) {
+ | efdcmpeq cr1, TMP0, TMP1
+ | cror 4*cr0+gt, 4*cr0+gt, 4*cr1+gt
+ }
+ if (op == BC_ISLT || op == BC_ISLE) {
+ | iselgt PC, TMP2, PC
+ } else {
+ | iselgt PC, PC, TMP2
+ }
+ | ins_next
+ break;
+
+ case BC_ISEQV: case BC_ISNEV:
+ vk = op == BC_ISEQV;
+ | // RA = src1*8, RD = src2*8, JMP with RD = target
+ | evlddx CARG2, BASE, RA
+ | addi PC, PC, 4
+ | evlddx CARG3, BASE, RD
+ | addis TMP3, PC, -(BCBIAS_J*4 >> 16)
+ | lwz TMP2, -4(PC)
+ | evmergehi RB, CARG2, CARG3
+ | decode_RD4 TMP2, TMP2
+ | checknum RB
+ | add TMP2, TMP2, TMP3
+ | checkanyfail >5
+ | efdcmpeq CARG2, CARG3
+ if (vk) {
+ | iselgt PC, TMP2, PC
+ } else {
+ | iselgt PC, PC, TMP2
+ }
+ |1:
+ | ins_next
+ |
+ |5: // Either or both types are not numbers.
+ | evcmpeq CARG2, CARG3
+ | not TMP3, RB
+ | cmplwi cr1, TMP3, ~LJ_TISPRI // Primitive?
+ | crorc 4*cr7+lt, 4*cr0+so, 4*cr0+lt // 1: Same tv or different type.
+ | cmplwi cr6, TMP3, ~LJ_TISTABUD // Table or userdata?
+ | crandc 4*cr7+gt, 4*cr0+lt, 4*cr1+gt // 2: Same type and primitive.
+ | mr SAVE0, PC
+ if (vk) {
+ | isel PC, TMP2, PC, 4*cr7+gt
+ } else {
+ | isel TMP2, PC, TMP2, 4*cr7+gt
+ }
+ | cror 4*cr7+lt, 4*cr7+lt, 4*cr7+gt // 1 or 2.
+ if (vk) {
+ | isel PC, TMP2, PC, 4*cr0+so
+ } else {
+ | isel PC, PC, TMP2, 4*cr0+so
+ }
+ | blt cr7, <1 // Done if 1 or 2.
+ | 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
+ | andi. 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
+ | evlddx TMP0, BASE, RA
+ | srwi RD, RD, 1
+ | lwz INS, 0(PC)
+ | subfic RD, RD, -4
+ | addi PC, PC, 4
+ | lwzx STR:TMP1, KBASE, RD // KBASE-4-str_const*4
+ | addis TMP3, PC, -(BCBIAS_J*4 >> 16)
+ | decode_RD4 TMP2, INS
+ | evmergelo STR:TMP1, TISSTR, STR:TMP1
+ | add TMP2, TMP2, TMP3
+ | evcmpeq TMP0, STR:TMP1
+ if (vk) {
+ | isel PC, TMP2, PC, 4*cr0+so
+ } else {
+ | isel PC, PC, TMP2, 4*cr0+so
+ }
+ | ins_next
+ break;
+
+ case BC_ISEQN: case BC_ISNEN:
+ vk = op == BC_ISEQN;
+ | // RA = src*8, RD = num_const*8, JMP with RD = target
+ | evlddx TMP0, BASE, RA
+ | addi PC, PC, 4
+ | evlddx TMP1, KBASE, RD
+ | addis TMP3, PC, -(BCBIAS_J*4 >> 16)
+ | lwz INS, -4(PC)
+ | checknum TMP0
+ | checkfail >5
+ | efdcmpeq TMP0, TMP1
+ |1:
+ | decode_RD4 TMP2, INS
+ | add TMP2, TMP2, TMP3
+ if (vk) {
+ | iselgt PC, TMP2, PC
+ |5:
+ } else {
+ | iselgt PC, PC, TMP2
+ }
+ |3:
+ | ins_next
+ if (!vk) {
+ |5:
+ | decode_RD4 TMP2, INS
+ | add PC, TMP2, TMP3
+ | b <3
+ }
+ 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 INS, 0(PC)
+ | addi PC, PC, 4
+ | not TMP1, TMP1
+ | addis TMP3, PC, -(BCBIAS_J*4 >> 16)
+ | cmplw TMP0, TMP1
+ | decode_RD4 TMP2, INS
+ | add TMP2, TMP2, TMP3
+ if (vk) {
+ | iseleq PC, TMP2, PC
+ } else {
+ | iseleq 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
+ | evlddx TMP0, BASE, RD
+ | evaddw TMP1, TISNIL, TISNIL // Synthesize LJ_TFALSE.
+ | lwz INS, 0(PC)
+ | evcmpltu TMP0, TMP1
+ | addi PC, PC, 4
+ if (op == BC_IST || op == BC_ISF) {
+ | addis TMP3, PC, -(BCBIAS_J*4 >> 16)
+ | decode_RD4 TMP2, INS
+ | add TMP2, TMP2, TMP3
+ if (op == BC_IST) {
+ | isellt PC, TMP2, PC
+ } else {
+ | isellt PC, PC, TMP2
+ }
+ } else {
+ if (op == BC_ISTC) {
+ | checkfail >1
+ } else {
+ | checkok >1
+ }
+ | addis PC, PC, -(BCBIAS_J*4 >> 16)
+ | decode_RD4 TMP2, INS
+ | evstddx TMP0, BASE, RA
+ | add PC, PC, TMP2
+ |1:
+ }
+ | ins_next
+ break;
+
+ /* -- Unary ops --------------------------------------------------------- */
+
+ case BC_MOV:
+ | // RA = dst*8, RD = src*8
+ | ins_next1
+ | evlddx TMP0, BASE, RD
+ | evstddx TMP0, BASE, RA
+ | ins_next2
+ break;
+ case BC_NOT:
+ | // RA = dst*8, RD = src*8
+ | ins_next1
+ | lwzx TMP0, BASE, RD
+ | 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
+ | evlddx TMP0, BASE, RD
+ | checknum TMP0
+ | checkfail ->vmeta_unm
+ | efdneg TMP0, TMP0
+ | ins_next1
+ | evstddx TMP0, BASE, RA
+ | ins_next2
+ break;
+ case BC_LEN:
+ | // RA = dst*8, RD = src*8
+ | evlddx CARG1, BASE, RD
+ | checkstr CARG1
+ | checkfail >2
+ | lwz CRET1, STR:CARG1->len
+ |1:
+ | ins_next1
+ | efdcfsi TMP0, CRET1
+ | evstddx TMP0, BASE, RA
+ | ins_next2
+ |2:
+ | checktab CARG1
+ | checkfail ->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
+ | andi. TMP0, TMP0, 1<<MM_len
+ | bne <3 // 'no __len' flag set: done.
+ | b ->vmeta_len
+#endif
+ break;
+
+ /* -- Binary ops -------------------------------------------------------- */
+
+ |.macro ins_arithpre, t0, t1
+ | // 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:
+ | evlddx t0, BASE, RB
+ | checknum t0
+ | evlddx t1, KBASE, RC
+ | checkfail ->vmeta_arith_vn
+ || break;
+ ||case 1:
+ | evlddx t1, BASE, RB
+ | checknum t1
+ | evlddx t0, KBASE, RC
+ | checkfail ->vmeta_arith_nv
+ || break;
+ ||default:
+ | evlddx t0, BASE, RB
+ | evlddx t1, BASE, RC
+ | evmergehi TMP2, t0, t1
+ | checknum TMP2
+ | checkanyfail ->vmeta_arith_vv
+ || break;
+ ||}
+ |.endmacro
+ |
+ |.macro ins_arith, ins
+ | ins_arithpre TMP0, TMP1
+ | ins_next1
+ | ins TMP0, TMP0, TMP1
+ | evstddx TMP0, BASE, RA
+ | ins_next2
+ |.endmacro
+
+ case BC_ADDVN: case BC_ADDNV: case BC_ADDVV:
+ | ins_arith efdadd
+ break;
+ case BC_SUBVN: case BC_SUBNV: case BC_SUBVV:
+ | ins_arith efdsub
+ break;
+ case BC_MULVN: case BC_MULNV: case BC_MULVV:
+ | ins_arith efdmul
+ break;
+ case BC_DIVVN: case BC_DIVNV: case BC_DIVVV:
+ | ins_arith efddiv
+ break;
+ case BC_MODVN:
+ | ins_arithpre RD, SAVE0
+ |->BC_MODVN_Z:
+ | efddiv CARG2, RD, SAVE0
+ | bl ->vm_floor_efd // floor(b/c)
+ | efdmul TMP0, CRET2, SAVE0
+ | ins_next1
+ | efdsub TMP0, RD, TMP0 // b - floor(b/c)*c
+ | evstddx TMP0, BASE, RA
+ | ins_next2
+ break;
+ case BC_MODNV: case BC_MODVV:
+ | ins_arithpre RD, SAVE0
+ | b ->BC_MODVN_Z // Avoid 3 copies. It's slow anyway.
+ break;
+ case BC_POW:
+ | evlddx CARG2, BASE, RB
+ | evlddx CARG4, BASE, RC
+ | evmergehi CARG1, CARG4, CARG2
+ | checknum CARG1
+ | evmergehi CARG3, CARG4, CARG4
+ | checkanyfail ->vmeta_arith_vv
+ | bl extern pow@plt
+ | evmergelo CRET2, CRET1, CRET2
+ | evstddx CRET2, BASE, RA
+ | ins_next
+ break;
+
+ case BC_CAT:
+ | // RA = dst*8, RB = src_start*8, RC = src_end*8
+ | sub CARG3, RC, RB
+ | stw 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
+ | lwz BASE, L->base
+ | bne ->vmeta_binop
+ | evlddx TMP0, BASE, SAVE0 // Copy result from RB to RA.
+ | evstddx TMP0, BASE, RA
+ | ins_next
+ break;
+
+ /* -- Constant ops ------------------------------------------------------ */
+
+ case BC_KSTR:
+ | // RA = dst*8, RD = str_const*8 (~)
+ | ins_next1
+ | srwi TMP1, RD, 1
+ | subfic TMP1, TMP1, -4
+ | lwzx TMP0, KBASE, TMP1 // KBASE-4-str_const*4
+ | evmergelo TMP0, TISSTR, TMP0
+ | evstddx TMP0, BASE, RA
+ | ins_next2
+ break;
+ case BC_KCDATA:
+ |.if FFI
+ | // RA = dst*8, RD = cdata_const*8 (~)
+ | ins_next1
+ | srwi TMP1, RD, 1
+ | subfic TMP1, TMP1, -4
+ | lwzx TMP0, KBASE, TMP1 // KBASE-4-cdata_const*4
+ | li TMP2, LJ_TCDATA
+ | evmergelo TMP0, TMP2, TMP0
+ | evstddx TMP0, BASE, RA
+ | ins_next2
+ |.endif
+ break;
+ case BC_KSHORT:
+ | // RA = dst*8, RD = int16_literal*8
+ | srwi TMP1, RD, 3
+ | extsh TMP1, TMP1
+ | ins_next1
+ | efdcfsi TMP0, TMP1
+ | evstddx TMP0, BASE, RA
+ | ins_next2
+ break;
+ case BC_KNUM:
+ | // RA = dst*8, RD = num_const*8
+ | evlddx TMP0, KBASE, RD
+ | ins_next1
+ | evstddx TMP0, 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
+ | evstddx TISNIL, BASE, RA
+ | addi RA, RA, 8
+ |1:
+ | evstddx 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
+ | ins_next1
+ | lwz LFUNC:RB, FRAME_FUNC(BASE)
+ | srwi RD, RD, 1
+ | addi RD, RD, offsetof(GCfuncL, uvptr)
+ | lwzx UPVAL:RB, LFUNC:RB, RD
+ | lwz TMP1, UPVAL:RB->v
+ | evldd TMP0, 0(TMP1)
+ | evstddx TMP0, 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)
+ | evlddx TMP1, BASE, RD
+ | lwzx UPVAL:RB, LFUNC:RB, RA
+ | lbz TMP3, UPVAL:RB->marked
+ | lwz CARG2, UPVAL:RB->v
+ | andi. TMP3, TMP3, LJ_GC_BLACK // isblack(uv)
+ | lbz TMP0, UPVAL:RB->closed
+ | evmergehi TMP2, TMP1, TMP1
+ | evstdd TMP1, 0(CARG2)
+ | cmplwi cr1, TMP0, 0
+ | cror 4*cr0+eq, 4*cr0+eq, 4*cr1+eq
+ | subi TMP2, TMP2, (LJ_TISNUM+1)
+ | bne >2 // Upvalue is closed and black?
+ |1:
+ | ins_next
+ |
+ |2: // Check if new value is collectable.
+ | cmplwi TMP2, LJ_TISGCV - (LJ_TISNUM+1)
+ | bge <1 // tvisgcv(v)
+ | lbz TMP3, GCOBJ:TMP1->gch.marked
+ | andi. 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
+ | evmergelo STR:TMP1, TISSTR, STR:TMP1
+ | lbz TMP3, UPVAL:RB->marked
+ | lwz CARG2, UPVAL:RB->v
+ | andi. TMP3, TMP3, LJ_GC_BLACK // isblack(uv)
+ | lbz TMP3, STR:TMP1->marked
+ | lbz TMP2, UPVAL:RB->closed
+ | evstdd STR:TMP1, 0(CARG2)
+ | bne >2
+ |1:
+ | ins_next
+ |
+ |2: // Check if string is white and ensure upvalue is closed.
+ | andi. 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
+ | ins_next1
+ | lwz LFUNC:RB, FRAME_FUNC(BASE)
+ | srwi RA, RA, 1
+ | addi RA, RA, offsetof(GCfuncL, uvptr)
+ | evlddx TMP0, KBASE, RD
+ | lwzx UPVAL:RB, LFUNC:RB, RA
+ | lwz TMP1, UPVAL:RB->v
+ | evstdd TMP0, 0(TMP1)
+ | ins_next2
+ break;
+ case BC_USETP:
+ | // RA = uvnum*8, RD = primitive_type*8 (~)
+ | ins_next1
+ | lwz LFUNC:RB, FRAME_FUNC(BASE)
+ | srwi RA, RA, 1
+ | addi RA, RA, offsetof(GCfuncL, uvptr)
+ | srwi TMP0, RD, 3
+ | lwzx UPVAL:RB, LFUNC:RB, RA
+ | not TMP0, TMP0
+ | 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.
+ | stw 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)
+ | lwz BASE, L->base
+ |1:
+ | ins_next
+ break;
+
+ case BC_FNEW:
+ | // RA = dst*8, RD = proto_const*8 (~) (holding function prototype)
+ | srwi TMP1, RD, 1
+ | stw 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 *.
+ | lwz BASE, L->base
+ | evmergelo LFUNC:CRET1, TISFUNC, LFUNC:CRET1
+ | evstddx LFUNC:CRET1, BASE, 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)
+ | stw 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
+ | li TMP1, 0x801
+ | iseleq CARG2, TMP1, CARG2
+ | 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 *.
+ }
+ | lwz BASE, L->base
+ | evmergelo TAB:CRET1, TISTAB, TAB:CRET1
+ | evstddx TAB:CRET1, BASE, RA
+ | ins_next
+ |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
+ | evlddx TAB:RB, BASE, RB
+ | evlddx RC, BASE, RC
+ | checktab TAB:RB
+ | checkfail ->vmeta_tgetv
+ | checknum RC
+ | checkfail >5
+ | // Convert number key to integer
+ | efdctsi TMP2, RC
+ | lwz TMP0, TAB:RB->asize
+ | efdcfsi TMP1, TMP2
+ | cmplw cr0, TMP0, TMP2
+ | efdcmpeq cr1, RC, TMP1
+ | lwz TMP1, TAB:RB->array
+ | crand 4*cr0+gt, 4*cr0+gt, 4*cr1+gt
+ | slwi TMP2, TMP2, 3
+ | ble ->vmeta_tgetv // Integer key and in array part?
+ | evlddx TMP1, TMP1, TMP2
+ | checknil TMP1
+ | checkok >2
+ |1:
+ | evstddx TMP1, BASE, RA
+ | ins_next
+ |
+ |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
+ | andi. TMP0, TMP0, 1<<MM_index
+ | bne <1 // 'no __index' flag set: done.
+ | b ->vmeta_tgetv
+ |
+ |5:
+ | checkstr STR:RC // String key?
+ | checkok ->BC_TGETS_Z
+ | b ->vmeta_tgetv
+ break;
+ case BC_TGETS:
+ | // RA = dst*8, RB = table*8, RC = str_const*8 (~)
+ | evlddx TAB:RB, BASE, RB
+ | srwi TMP1, RC, 1
+ | checktab TAB:RB
+ | subfic TMP1, TMP1, -4
+ | lwzx STR:RC, KBASE, TMP1 // KBASE-4-str_const*4
+ | checkfail ->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
+ | evmergelo STR:RC, TISSTR, STR:RC
+ | 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:
+ | evldd TMP0, NODE:TMP2->key
+ | evldd TMP1, NODE:TMP2->val
+ | evcmpeq TMP0, STR:RC
+ | checkanyfail >4
+ | checknil TMP1
+ | checkok >5 // Key found, but nil value?
+ |3:
+ | evstddx TMP1, BASE, 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.
+ | evmr TMP1, TISNIL
+ |
+ |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
+ | andi. 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
+ | evlddx TAB:RB, BASE, RB
+ | srwi TMP0, RC, 3
+ | checktab TAB:RB
+ | checkfail ->vmeta_tgetb
+ | lwz TMP1, TAB:RB->asize
+ | lwz TMP2, TAB:RB->array
+ | cmplw TMP0, TMP1
+ | bge ->vmeta_tgetb
+ | evlddx TMP1, TMP2, RC
+ | checknil TMP1
+ | checkok >5
+ |1:
+ | ins_next1
+ | evstddx TMP1, 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
+ | andi. TMP2, TMP2, 1<<MM_index
+ | bne <1 // 'no __index' flag set: done.
+ | b ->vmeta_tgetb // Caveat: preserve TMP0!
+ break;
+
+ case BC_TSETV:
+ | // RA = src*8, RB = table*8, RC = key*8
+ | evlddx TAB:RB, BASE, RB
+ | evlddx RC, BASE, RC
+ | checktab TAB:RB
+ | checkfail ->vmeta_tsetv
+ | checknum RC
+ | checkfail >5
+ | // Convert number key to integer
+ | efdctsi TMP2, RC
+ | evlddx SAVE0, BASE, RA
+ | lwz TMP0, TAB:RB->asize
+ | efdcfsi TMP1, TMP2
+ | cmplw cr0, TMP0, TMP2
+ | efdcmpeq cr1, RC, TMP1
+ | lwz TMP1, TAB:RB->array
+ | crand 4*cr0+gt, 4*cr0+gt, 4*cr1+gt
+ | slwi TMP0, TMP2, 3
+ | ble ->vmeta_tsetv // Integer key and in array part?
+ | lbz TMP3, TAB:RB->marked
+ | evlddx TMP2, TMP1, TMP0
+ | checknil TMP2
+ | checkok >3
+ |1:
+ | andi. TMP2, TMP3, LJ_GC_BLACK // isblack(table)
+ | evstddx SAVE0, 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
+ | andi. TMP2, TMP2, 1<<MM_newindex
+ | bne <1 // 'no __newindex' flag set: done.
+ | b ->vmeta_tsetv
+ |
+ |5:
+ | checkstr STR:RC // String key?
+ | checkok ->BC_TSETS_Z
+ | b ->vmeta_tsetv
+ |
+ |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 (~)
+ | evlddx TAB:RB, BASE, RB
+ | srwi TMP1, RC, 1
+ | checktab TAB:RB
+ | subfic TMP1, TMP1, -4
+ | lwzx STR:RC, KBASE, TMP1 // KBASE-4-str_const*4
+ | checkfail ->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
+ | evmergelo STR:RC, TISSTR, STR:RC
+ | stb ZERO, TAB:RB->nomm // Clear metamethod cache.
+ | and TMP1, TMP1, TMP0 // idx = str->hash & tab->hmask
+ | evlddx SAVE0, 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:
+ | evldd TMP0, NODE:TMP2->key
+ | evldd TMP1, NODE:TMP2->val
+ | evcmpeq TMP0, STR:RC
+ | checkanyfail >5
+ | checknil TMP1
+ | checkok >4 // Key found, but nil value?
+ |2:
+ | andi. TMP0, TMP3, LJ_GC_BLACK // isblack(table)
+ | evstdd SAVE0, 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
+ | andi. TMP0, TMP0, 1<<MM_newindex
+ | bne <2 // 'no __newindex' flag set: done.
+ | b ->vmeta_tsets
+ |
+ |5: // Follow hash chain.
+ | lwz NODE:TMP2, NODE:TMP2->next
+ | cmplwi NODE:TMP2, 0
+ | 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
+ | stw BASE, L->base
+ | beq >6 // No metatable: continue.
+ | lbz TMP0, TAB:TMP1->nomm
+ | andi. TMP0, TMP0, 1<<MM_newindex
+ | beq ->vmeta_tsets // 'no __newindex' flag NOT set: check.
+ |6:
+ | mr CARG2, TAB:RB
+ | evstdd STR:RC, 0(CARG3)
+ | bl extern lj_tab_newkey // (lua_State *L, GCtab *t, TValue *k)
+ | // Returns TValue *.
+ | lwz BASE, L->base
+ | evstdd SAVE0, 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
+ | evlddx TAB:RB, BASE, RB
+ | srwi TMP0, RC, 3
+ | checktab TAB:RB
+ | checkfail ->vmeta_tsetb
+ | lwz TMP1, TAB:RB->asize
+ | lwz TMP2, TAB:RB->array
+ | lbz TMP3, TAB:RB->marked
+ | cmplw TMP0, TMP1
+ | evlddx SAVE0, BASE, RA
+ | bge ->vmeta_tsetb
+ | evlddx TMP1, TMP2, RC
+ | checknil TMP1
+ | checkok >5
+ |1:
+ | andi. TMP0, TMP3, LJ_GC_BLACK // isblack(table)
+ | evstddx SAVE0, 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
+ | andi. 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_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
+ | andi. TMP0, TMP3, LJ_GC_BLACK // isblack(table)
+ |3: // Copy result slots to table.
+ | evldd TMP0, 0(RA)
+ | addi RA, RA, 8
+ | cmpw cr1, RA, TMP2
+ | evstdd TMP0, 0(TMP1)
+ | addi TMP1, TMP1, 8
+ | blt cr1, <3
+ | bne >7
+ |4:
+ | ins_next
+ |
+ |5: // Need to resize array part.
+ | stw 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
<TRUNCATED>