diff options
Diffstat (limited to 'ThirdParty/tolua_runtime/luajit-2.1/src/vm_s390x.dasc')
| -rw-r--r-- | ThirdParty/tolua_runtime/luajit-2.1/src/vm_s390x.dasc | 4262 |
1 files changed, 4262 insertions, 0 deletions
diff --git a/ThirdParty/tolua_runtime/luajit-2.1/src/vm_s390x.dasc b/ThirdParty/tolua_runtime/luajit-2.1/src/vm_s390x.dasc new file mode 100644 index 0000000..a107be2 --- /dev/null +++ b/ThirdParty/tolua_runtime/luajit-2.1/src/vm_s390x.dasc @@ -0,0 +1,4262 @@ +|// Low-level VM code for IBM z/Architecture (s390x) CPUs in LJ_GC64 mode. +|// Bytecode interpreter, fast functions and helper functions. +|// Copyright (C) 2005-2017 Mike Pall. See Copyright Notice in luajit.h +| +|// This assembly targets the instruction set available on z10 (and newer) +|// machines. +| +|// ELF ABI registers: +|// r0,r1 | | volatile | +|// r2 | parameter and return value | volatile | +|// r3-r5 | parameter | volatile | +|// r6 | parameter | saved | +|// r7-r11 | | saved | +|// r12 | GOT pointer (needed?) | saved | +|// r13 | literal pool (not needed) | saved | +|// r14 | return address | volatile | +|// r15 | stack pointer | saved | +|// f0,f2,f4,f6 | parameter and return value | volatile | +|// f1,f3,f5,f7 | | volatile | +|// f8-f15 | | saved | +|// ar0,ar1 | TLS | volatile | +|// ar2-ar15 | | volatile | +| +|.arch s390x +|.section code_op, code_sub +| +|.actionlist build_actionlist +|.globals GLOB_ +|.globalnames globnames +|.externnames extnames +| +|//----------------------------------------------------------------------- +| +|// Fixed register assignments for the interpreter, callee-saved. +|.define KBASE, r8 // Constants of current Lua function. +|.define PC, r9 // Next PC. +|.define DISPATCH, r10 // Opcode dispatch table. +|.define ITYPE, r11 // Temporary used for type information. +|.define BASE, r13 // Base of current Lua stack frame. +| +|// The following temporaries are not saved across C calls, except for RB. +|.define RA, r4 // Overlaps CARG3. +|.define RB, r7 // Must be callee-save. +|.define RC, r5 // Overlaps CARG4. +|.define RD, r6 // Overlaps CARG5. +| +|// Calling conventions. Also used as temporaries. +|.define CARG1, r2 +|.define CARG2, r3 +|.define CARG3, r4 +|.define CARG4, r5 +|.define CARG5, r6 +| +|.define FARG1, f0 +|.define FARG2, f2 +|.define FARG3, f4 +|.define FARG4, f6 +| +|.define CRET1, r2 +| +|.define TMPR0, r0 +|.define TMPR1, r1 +|.define OP, r2 +| +|// Stack layout while in interpreter. Must match with lj_frame.h. +|.define CFRAME_SPACE, 240 // Delta for sp, 8 byte aligned. +| +|// Register save area. +|.define SAVE_GPRS, 288(sp) // Save area for r6-r15 (10*8 bytes). +|.define SAVE_GPRS_P, 48(sp) // Save area for r6-r15 (10*8 bytes) in prologue (before stack frame is allocated). +| +|// Argument save area. +|.define SAVE_ERRF, 280(sp) // Argument 4, in r5. +|.define SAVE_NRES, 272(sp) // Argument 3, in r4. Size is 4-bytes. +|.define SAVE_CFRAME, 264(sp) // Argument 2, in r3. +|.define SAVE_L, 256(sp) // Argument 1, in r2. +|.define RESERVED, 248(sp) // Reserved for compiler use. +|.define BACKCHAIN, 240(sp) // <- sp entering interpreter. +| +|// Interpreter stack frame. +|.define SAVE_FPR15, 232(sp) +|.define SAVE_FPR14, 224(sp) +|.define SAVE_FPR13, 216(sp) +|.define SAVE_FPR12, 208(sp) +|.define SAVE_FPR11, 200(sp) +|.define SAVE_FPR10, 192(sp) +|.define SAVE_FPR9, 184(sp) +|.define SAVE_FPR8, 176(sp) +|.define SAVE_PC, 168(sp) +|.define SAVE_MULTRES, 160(sp) +|.define SAVE_TMP, 160(sp) // Overlaps SAVE_MULTRES +|.define SAVE_TMP_HI, 164(sp) // High 32-bits (to avoid SAVE_MULTRES). +| +|// Callee save area (allocated by interpreter). +|.define CALLEESAVE, 000(sp) // <- sp in interpreter. +| +|.macro saveregs +| stmg r6, r15, SAVE_GPRS_P +| lay sp, -CFRAME_SPACE(sp) // Allocate stack frame. +| std f8, SAVE_FPR8 // f8-f15 are callee-saved. +| std f9, SAVE_FPR9 +| std f10, SAVE_FPR10 +| std f11, SAVE_FPR11 +| std f12, SAVE_FPR12 +| std f13, SAVE_FPR13 +| std f14, SAVE_FPR14 +| std f15, SAVE_FPR15 +|.endmacro +| +|.macro restoreregs +| ld f8, SAVE_FPR8 // f8-f15 are callee-saved. +| ld f9, SAVE_FPR9 +| ld f10, SAVE_FPR10 +| ld f11, SAVE_FPR11 +| ld f12, SAVE_FPR12 +| ld f13, SAVE_FPR13 +| ld f14, SAVE_FPR14 +| ld f15, SAVE_FPR15 +| lmg r6, r15, SAVE_GPRS // Restores the stack pointer. +|.endmacro +| +|// Type definitions. Some of these are only used for documentation. +|.type L, lua_State +|.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 NARGS, int +|.type TRACE, GCtrace +|.type SBUF, SBuf +| +|//----------------------------------------------------------------------- +| +|// Instruction headers. +|.macro ins_A; .endmacro +|.macro ins_AD; .endmacro +|.macro ins_AJ; .endmacro +|.macro ins_ABC; srlg RB, RD, 8; llgcr RC, RD; .endmacro +|.macro ins_AB_; srlg RB, RD, 8; .endmacro +|.macro ins_A_C; llgcr RC, RD; .endmacro +|.macro ins_AND; lghi TMPR1, -1; xgr RD, TMPR1; .endmacro // RD = ~RD +| +|// Instruction decode+dispatch. +|.macro ins_NEXT +| llgc OP, 3(PC) +| llgh RD, 0(PC) +| llgc RA, 2(PC) +| sllg TMPR1, OP, 3 +| lg TMPR1, 0(TMPR1, DISPATCH) +| la PC, 4(PC) +| br TMPR1 +|.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 +|.else +| // Common dispatch. Lower I-Cache use, only one (very) unpredictable branch. +| .macro ins_next +| j ->ins_next +| .endmacro +| .macro ins_next_ +| ->ins_next: +| ins_NEXT +| .endmacro +|.endif +| +|// Call decode and dispatch. +|.macro ins_callt +| // BASE = new base, RB = LFUNC, RD = nargs+1, -8(BASE) = PC +| lg PC, LFUNC:RB->pc +| llgc OP, 3(PC) +| llgc RA, 2(PC) +| sllg TMPR1, OP, 3 +| la PC, 4(PC) +| lg TMPR1, 0(TMPR1, DISPATCH) +| br TMPR1 +|.endmacro +| +|.macro ins_call +| // BASE = new base, RB = LFUNC, RD = nargs+1 +| stg PC, -8(BASE) +| ins_callt +|.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)) +| +|//----------------------------------------------------------------------- +| +|// Macros to clear or set tags. +|.macro cleartp, reg +| nihf reg, 0x7fff +|.endmacro +|.macro settp, reg, tp +| oihf reg, tp<<15 +|.endmacro +|.macro settp, dst, reg, tp +| llihf dst, tp<<15 +| ogr dst, reg +|.endmacro +|.macro setint, reg +| settp reg, LJ_TISNUM +|.endmacro +|.macro setint, dst, reg +| settp dst, reg, LJ_TISNUM +|.endmacro +| +|// Macros to test operand types. +|.macro checktp_nc, reg, tp, target +| srag ITYPE, reg, 47 +| clfi ITYPE, tp +| jne target +|.endmacro +|.macro checktp, reg, tp, target +| srag ITYPE, reg, 47 +| cleartp reg +| clfi ITYPE, tp +| jne target +|.endmacro +|.macro checktptp, src, tp, target +| srag ITYPE, src, 47 +| clfi ITYPE, tp +| jne target +|.endmacro +|.macro checkstr, reg, target; checktp reg, LJ_TSTR, target; .endmacro +|.macro checktab, reg, target; checktp reg, LJ_TTAB, target; .endmacro +|.macro checkfunc, reg, target; checktp reg, LJ_TFUNC, target; .endmacro +| +|.macro checknumx, reg, target, jump +| srag ITYPE, reg, 47 +| clfi ITYPE, LJ_TISNUM +| jump target +|.endmacro +|.macro checkint, reg, target; checknumx reg, target, jne; .endmacro +|.macro checkinttp, src, target; checknumx src, target, jne; .endmacro +|.macro checknum, reg, target; checknumx reg, target, jhe; .endmacro +|.macro checknumtp, src, target; checknumx src, target, jhe; .endmacro +|.macro checknumber, src, target; checknumx src, target, jh; .endmacro +| +|.macro load_false, reg; lghi reg, -1; iihl reg, 0x7fff; .endmacro // assumes LJ_TFALSE == ~(1<<47) +|.macro load_true, reg; lghi reg, -1; iihh reg, 0xfffe; .endmacro // assumes LJ_TTRUE == ~(2<<47) +| +|.define PC_OP, -1(PC) +|.define PC_RA, -2(PC) +|.define PC_RB, -4(PC) +|.define PC_RC, -3(PC) +|.define PC_RD, -4(PC) +| +|.macro branchPC, reg +| // Must not clobber condition code. +| sllg TMPR1, reg, 2 +| lay PC, (-BCBIAS_J*4)(TMPR1, PC) +|.endmacro +| +|// Set current VM state. +|.macro set_vmstate, st +| lghi TMPR1, ~LJ_VMST_..st +| stg TMPR1, DISPATCH_GL(vmstate)(DISPATCH) +|.endmacro +| +|// Synthesize binary floating-point constants. +|.macro bfpconst_tobit, reg, tmp // Synthesize 2^52 + 2^51. +| llihh tmp, 0x4338 +| ldgr reg, tmp +|.endmacro +| +|// Move table write barrier back. Overwrites reg. +|.macro barrierback, tab, reg +| ni tab->marked, ~LJ_GC_BLACK // black2gray(tab) +| lg reg, (DISPATCH_GL(gc.grayagain))(DISPATCH) +| stg tab, (DISPATCH_GL(gc.grayagain))(DISPATCH) +| stg reg, tab->gclist +|.endmacro + +#if !LJ_DUALNUM +#error "Only dual-number mode supported for s390x target" +#endif + +/* 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: + | tmll PC, FRAME_P + | je ->cont_dispatch + | + | // Return from pcall or xpcall fast func. + | nill PC, -8 + | sgr BASE, PC // Restore caller base. + | lay RA, -8(RA, PC) // Rebase RA and prepend one result. + | lg PC, -8(BASE) // Fetch PC of previous frame. + | // Prepending may overwrite the pcall frame, so do it at the end. + | load_true ITYPE + | stg ITYPE, 0(RA, BASE) // Prepend true to results. + | + |->vm_returnc: + | aghi RD, 1 // RD = nresults+1 + | je ->vm_unwind_yield + | st RD, SAVE_MULTRES + | tmll PC, FRAME_TYPE + | je ->BC_RET_Z // Handle regular return to Lua. + | + |->vm_return: + | // BASE = base, RA = resultofs, RD = nresults+1 (= MULTRES), PC = return + | lghi TMPR1, FRAME_C + | xgr PC, TMPR1 + | tmll PC, FRAME_TYPE + | jne ->vm_returnp + | + | // Return to C. + | set_vmstate C + | nill PC, -8 + | sgr PC, BASE + | lcgr PC, PC // Previous base = BASE - delta. + | + | aghi RD, -1 + | je >2 + |1: // Move results down. + | lg RB, 0(BASE, RA) + | stg RB, -16(BASE) + | la BASE, 8(BASE) + | aghi RD, -1 + | jne <1 + |2: + | lg L:RB, SAVE_L + | stg PC, L:RB->base + |3: + | llgf RD, SAVE_MULTRES + | lgf RA, SAVE_NRES // RA = wanted nresults+1 + |4: + | cgr RA, RD + | jne >6 // More/less results wanted? + |5: + | lay BASE, -16(BASE) + | stg BASE, L:RB->top + | + |->vm_leave_cp: + | lg RA, SAVE_CFRAME // Restore previous C frame. + | stg RA, L:RB->cframe + | lghi CRET1, 0 // Ok return status for vm_pcall. + | + |->vm_leave_unw: + | restoreregs + | br r14 + | + |6: + | jl >7 // Less results wanted? + | // More results wanted. Check stack size and fill up results with nil. + | cg BASE, L:RB->maxstack + | jh >8 + | lghi TMPR1, LJ_TNIL + | stg TMPR1, -16(BASE) + | la BASE, 8(BASE) + | aghi RD, 1 + | j <4 + | + |7: // Fewer results wanted. + | cghi RA, 0 + | je <5 // But check for LUA_MULTRET+1. + | sgr RA, RD // Negative result! + | sllg TMPR1, RA, 3 + | la BASE, 0(TMPR1, BASE) // Correct top. + | j <5 + | + |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. + | stg BASE, L:RB->top // Save current top held in BASE (yes). + | st RD, SAVE_MULTRES // Need to fill only remainder with nil. + | lgr CARG2, RA + | lgr CARG1, L:RB + | brasl r14, extern lj_state_growstack // (lua_State *L, int n) + | lg BASE, L:RB->top // Need the (realloced) L->top in BASE. + | j <3 + | + |->vm_unwind_yield: + | lghi CRET1, LUA_YIELD + | j ->vm_unwind_c_eh + | + |->vm_unwind_c: // Unwind C stack, return from vm_pcall. + | // (void *cframe, int errcode) + | lgr sp, CARG1 + | lgfr CARG2, CRET1 // Error return status for vm_pcall. + |->vm_unwind_c_eh: // Landing pad for external unwinder. + | lg L:RB, SAVE_L + | lg GL:RB, L:RB->glref + | lghi TMPR1, ~LJ_VMST_C + | stg TMPR1, GL:RB->vmstate + | j ->vm_leave_unw + | + |->vm_unwind_ff: // Unwind C stack, return from ff pcall. + | // (void *cframe) + | nill CARG1, CFRAME_RAWMASK // Assumes high 48-bits set in CFRAME_RAWMASK. + | lgr sp, CARG1 + |->vm_unwind_ff_eh: // Landing pad for external unwinder. + | lg L:RB, SAVE_L + | lghi RD, 1+1 // Really 1+2 results, incr. later. + | lg BASE, L:RB->base + | lg DISPATCH, L:RB->glref // Setup pointer to dispatch table. + | la DISPATCH, GG_G2DISP(DISPATCH) + | lg PC, -8(BASE) // Fetch PC of previous frame. + | load_false RA + | lg RB, 0(BASE) + | stg RA, -16(BASE) // Prepend false to error message. + | stg RB, -8(BASE) + | lghi RA, -16 // Results start at BASE+RA = BASE-16. + | set_vmstate INTERP + | j ->vm_returnc // Increments RD/MULTRES and returns. + | + |//----------------------------------------------------------------------- + |//-- Grow stack for calls ----------------------------------------------- + |//----------------------------------------------------------------------- + | + |->vm_growstack_c: // Grow stack for C function. + | lghi CARG2, LUA_MINSTACK + | j >2 + | + |->vm_growstack_v: // Grow stack for vararg Lua function. + | aghi RD, -16 // LJ_FR2 + | j >1 + | + |->vm_growstack_f: // Grow stack for fixarg Lua function. + | // BASE = new base, RD = nargs+1, RB = L, PC = first PC + | sllg RD, NARGS:RD, 3 + | lay RD, -8(RD, BASE) + |1: + | llgc RA, (PC2PROTO(framesize)-4)(PC) + | la PC, 4(PC) // Must point after first instruction. + | stg BASE, L:RB->base + | stg RD, L:RB->top + | stg PC, SAVE_PC + | lgr CARG2, RA + |2: + | // RB = L, L->base = new base, L->top = top + | lgr CARG1, L:RB + | brasl r14, extern lj_state_growstack // (lua_State *L, int n) + | lg BASE, L:RB->base + | lg RD, L:RB->top + | lg LFUNC:RB, -16(BASE) + | cleartp LFUNC:RB + | sgr RD, BASE + | srlg RD, RD, 3 + | aghi NARGS:RD, 1 + | // BASE = new base, RB = LFUNC, RD = nargs+1 + | 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 + | lgr L:RB, CARG1 + | stg CARG1, SAVE_L + | lgr RA, CARG2 + | lghi PC, FRAME_CP + | lghi RD, 0 + | la KBASE, CFRAME_RESUME(sp) + | lg DISPATCH, L:RB->glref // Setup pointer to dispatch table. + | aghi DISPATCH, GG_G2DISP + | stg RD, SAVE_PC // Any value outside of bytecode is ok. + | stg RD, SAVE_CFRAME + | st RD, SAVE_NRES + | stg RD, SAVE_ERRF + | stg KBASE, L:RB->cframe + | clm RD, 1, L:RB->status + | je >2 // Initial resume (like a call). + | + | // Resume after yield (like a return). + | stg L:RB, (DISPATCH_GL(cur_L))(DISPATCH) + | set_vmstate INTERP + | stc RD, L:RB->status + | lg BASE, L:RB->base + | lg RD, L:RB->top + | sgr RD, RA + | srlg RD, RD, 3 + | aghi RD, 1 // RD = nresults+1 + | sgr RA, BASE // RA = resultofs + | lg PC, -8(BASE) + | st RD, SAVE_MULTRES + | tmll PC, FRAME_TYPE + | je ->BC_RET_Z + | j ->vm_return + | + |->vm_pcall: // Setup protected C frame and enter VM. + | // (lua_State *L, TValue *base, int nres1, ptrdiff_t ef) + | saveregs + | lghi PC, FRAME_CP + | llgfr CARG4, CARG4 + | stg CARG4, SAVE_ERRF + | j >1 + | + |->vm_call: // Setup C frame and enter VM. + | // (lua_State *L, TValue *base, int nres1) + | saveregs + | lghi PC, FRAME_C + | + |1: // Entry point for vm_pcall above (PC = ftype). + | st CARG3, SAVE_NRES + | lgr L:RB, CARG1 + | stg CARG1, SAVE_L + | lgr RA, CARG2 // Caveat: RA = CARG3. + | + | lg DISPATCH, L:RB->glref // Setup pointer to dispatch table. + | lg KBASE, L:RB->cframe // Add our C frame to cframe chain. + | stg KBASE, SAVE_CFRAME + | stg L:RB, SAVE_PC // Any value outside of bytecode is ok. + | aghi DISPATCH, GG_G2DISP + | stg sp, L:RB->cframe + | + |2: // Entry point for vm_resume/vm_cpcall (RA = base, RB = L, PC = ftype). + | stg L:RB, DISPATCH_GL(cur_L)(DISPATCH) + | set_vmstate INTERP + | lg BASE, L:RB->base // BASE = old base (used in vmeta_call). + | agr PC, RA + | sgr PC, BASE // PC = frame delta + frame type + | + | lg RD, L:RB->top + | sgr RD, RA + | srlg NARGS:RD, NARGS:RD, 3 + | aghi NARGS:RD, 1 // RD = nargs+1 + | + |->vm_call_dispatch: + | lg LFUNC:RB, -16(RA) + | checkfunc LFUNC:RB, ->vmeta_call // Ensure KBASE defined and != BASE. + | + |->vm_call_dispatch_f: + | lgr BASE, RA + | ins_call + | // BASE = new base, RB = func, RD = nargs+1, PC = caller PC + | + |->vm_cpcall: // Setup protected C frame, call C. + | // (lua_State *L, lua_CFunction func, void *ud, lua_CPFunction cp) + | saveregs + | lgr L:RB, CARG1 + | stg L:RB, SAVE_L + | stg L:RB, SAVE_PC // Any value outside of bytecode is ok. + | + | lg KBASE, L:RB->stack // Compute -savestack(L, L->top). + | sg KBASE, L:RB->top + | lg DISPATCH, L:RB->glref // Setup pointer to dispatch table. + | lghi TMPR0, 0 + | stg TMPR0, SAVE_ERRF // No error function. + | st KBASE, SAVE_NRES // Neg. delta means cframe w/o frame. + | aghi DISPATCH, GG_G2DISP + | // Handler may change cframe_nres(L->cframe) or cframe_errfunc(L->cframe). + | + | lg KBASE, L:RB->cframe // Add our C frame to cframe chain. + | stg KBASE, SAVE_CFRAME + | stg sp, L:RB->cframe + | stg L:RB, DISPATCH_GL(cur_L)(DISPATCH) + | + | basr r14, CARG4 // (lua_State *L, lua_CFunction func, void *ud) + | // TValue * (new base) or NULL returned in r2 (CRET1/). + | cghi CRET1, 0 + | je ->vm_leave_cp // No base? Just remove C frame. + | lgr RA, CRET1 + | lghi PC, FRAME_CP + | j <2 // Else continue with the call. + | + |//----------------------------------------------------------------------- + |//-- Metamethod handling ------------------------------------------------ + |//----------------------------------------------------------------------- + | + |//-- Continuation dispatch ---------------------------------------------- + | + |->cont_dispatch: + | // BASE = meta base, RA = resultofs, RD = nresults+1 (also in MULTRES) + | agr RA, BASE + | nill PC, -8 + | lgr RB, BASE + | sgr BASE, PC // Restore caller BASE. + | sllg TMPR1, RD, 3 + | lghi TMPR0, LJ_TNIL + | stg TMPR0, -8(RA, TMPR1) // Ensure one valid arg. + | lgr RC, RA // ... in [RC] + | lg PC, -24(RB) // Restore PC from [cont|PC]. + | lg RA, -32(RB) + |.if FFI + | clfi RA, 1 + | jle >1 + |.endif + | lg LFUNC:KBASE, -16(BASE) + | cleartp LFUNC:KBASE + | lg KBASE, LFUNC:KBASE->pc + | lg KBASE, (PC2PROTO(k))(KBASE) + | // BASE = base, RC = result, RB = meta base + | br RA // Jump to continuation. + | + |.if FFI + |1: + | je ->cont_ffi_callback // cont = 1: return from FFI callback. + | // cont = 0: Tail call from C function. + | sgr RB, BASE + | srl RB, 3 + | ahi RB, -3 + | llgfr RD, RB + | j ->vm_call_tail + |.endif + | + |->cont_cat: // BASE = base, RC = result, RB = mbase + | llgc RA, PC_RB + | sllg RA, RA, 3 + | aghi RB, -32 + | la RA, 0(RA, BASE) + | sgr RA, RB + | je ->cont_ra + | lcgr RA, RA + | srlg RA, RA, 3 + | lg L:CARG1, SAVE_L + | stg BASE, L:CARG1->base + | lgfr CARG3, RA // Caveat: RA == CARG3. + | lg TMPR0, 0(RC) + | stg TMPR0, 0(RB) + | lgr CARG2, RB + | j ->BC_CAT_Z + | + |//-- Table indexing metamethods ----------------------------------------- + | + |->vmeta_tgets: + | settp STR:RC, LJ_TSTR // STR:RC = GCstr * + | stg STR:RC, SAVE_TMP + | la RC, SAVE_TMP + | llgc TMPR1, PC_OP + | cghi TMPR1, BC_GGET + | jne >1 + | settp TAB:RA, TAB:RB, LJ_TTAB // TAB:RB = GCtab * + | lay RB, (DISPATCH_GL(tmptv))(DISPATCH) // Store fn->l.env in g->tmptv. + | stg TAB:RA, 0(RB) + | j >2 + | + |->vmeta_tgetb: + | llgc RC, PC_RC + | setint RC + | stg RC, SAVE_TMP + | la RC, SAVE_TMP + | j >1 + | + |->vmeta_tgetv: + | llgc RC, PC_RC // Reload TValue *k from RC. + | sllg RC, RC, 3 + | la RC, 0(RC, BASE) + |1: + | llgc RB, PC_RB // Reload TValue *t from RB. + | sllg RB, RB, 3 + | la RB, 0(RB, BASE) + |2: + | lg L:CARG1, SAVE_L + | stg BASE, L:CARG1->base + | lgr CARG2, RB + | lgr CARG3, RC + | lgr L:RB, L:CARG1 + | stg PC, SAVE_PC + | brasl r14, extern lj_meta_tget // (lua_State *L, TValue *o, TValue *k) + | // TValue * (finished) or NULL (metamethod) returned in r2 (CRET1). + | lg BASE, L:RB->base + | ltgr RC, CRET1 + | je >3 + |->cont_ra: // BASE = base, RC = result + | llgc RA, PC_RA + | sllg RA, RA, 3 + | lg RB, 0(RC) + | stg RB, 0(RA, BASE) + | ins_next + | + |3: // Call __index metamethod. + | // BASE = base, L->top = new base, stack = cont/func/t/k + | lg RA, L:RB->top + | stg PC, -24(RA) // [cont|PC] + | la PC, FRAME_CONT(RA) + | sgr PC, BASE + | lg LFUNC:RB, -16(RA) // Guaranteed to be a function here. + | lghi NARGS:RD, 2+1 // 2 args for func(t, k). + | cleartp LFUNC:RB + | j ->vm_call_dispatch_f + | + |->vmeta_tgetr: + | lgr CARG1, TAB:RB + | lgfr CARG2, RC + | brasl r14, extern lj_tab_getinth // (GCtab *t, int32_t key) + | // cTValue * or NULL returned in r2 (CRET1). + | llgc RA, PC_RA + | ltgr RC, CRET1 + | jne ->BC_TGETR_Z + | lghi ITYPE, LJ_TNIL + | j ->BC_TGETR2_Z + | + |//----------------------------------------------------------------------- + | + |->vmeta_tsets: + | settp STR:RC, LJ_TSTR // STR:RC = GCstr * + | stg STR:RC, SAVE_TMP + | la RC, SAVE_TMP + | llgc TMPR0, PC_OP + | cghi TMPR0, BC_GSET + | jne >1 + | settp TAB:RA, TAB:RB, LJ_TTAB // TAB:RB = GCtab * + | lay RB, (DISPATCH_GL(tmptv))(DISPATCH) // Store fn->l.env in g->tmptv. + | stg TAB:RA, 0(RB) + | j >2 + | + |->vmeta_tsetb: + | llgc RC, PC_RC + | setint RC + | stg RC, SAVE_TMP + | la RC, SAVE_TMP + | j >1 + | + |->vmeta_tsetv: + | llgc RC, PC_RC // Reload TValue *k from RC. + | sllg RC, RC, 3 + | la RC, 0(RC, BASE) + |1: + | llgc RB, PC_RB // Reload TValue *t from RB. + | sllg RB, RB, 3 + | la RB, 0(RB, BASE) + |2: + | lg L:CARG1, SAVE_L + | stg BASE, L:CARG1->base + | lgr CARG2, RB + | lgr CARG3, RC + | lgr L:RB, L:CARG1 + | stg PC, SAVE_PC + | brasl r14, extern lj_meta_tset // (lua_State *L, TValue *o, TValue *k) + | // TValue * (finished) or NULL (metamethod) returned in r2 (CRET1). + | lg BASE, L:RB->base + | ltgr RC, CRET1 + | je >3 + | // NOBARRIER: lj_meta_tset ensures the table is not black. + | llgc RA, PC_RA + | sllg RA, RA, 3 + | lg RB, 0(RA, BASE) + | stg RB, 0(RC) + |->cont_nop: // BASE = base, (RC = result) + | ins_next + | + |3: // Call __newindex metamethod. + | // BASE = base, L->top = new base, stack = cont/func/t/k/(v) + | lg RA, L:RB->top + | stg PC, -24(RA) // [cont|PC] + | llgc RC, PC_RA + | // Copy value to third argument. + | sllg RB, RC, 3 + | lg RB, 0(RB, BASE) + | stg RB, 16(RA) + | la PC, FRAME_CONT(RA) + | sgr PC, BASE + | lg LFUNC:RB, -16(RA) // Guaranteed to be a function here. + | lghi NARGS:RD, 3+1 // 3 args for func(t, k, v). + | cleartp LFUNC:RB + | j ->vm_call_dispatch_f + | + |->vmeta_tsetr: + | lg L:CARG1, SAVE_L + | lgr CARG2, TAB:RB + | stg BASE, L:CARG1->base + | lgfr CARG3, RC + | stg PC, SAVE_PC + | brasl r14, extern lj_tab_setinth // (lua_State *L, GCtab *t, int32_t key) + | // TValue * returned in r2 (CRET1). + | lgr RC, CRET1 + | llgc RA, PC_RA + | j ->BC_TSETR_Z + | + |//-- Comparison metamethods --------------------------------------------- + | + |->vmeta_comp: + | llgh RD, PC_RD + | sllg RD, RD, 3 + | llgc RA, PC_RA + | sllg RA, RA, 3 + | lg L:RB, SAVE_L + | stg BASE, L:RB->base + | la CARG2, 0(RA, BASE) + | la CARG3, 0(RD, BASE) // Caveat: RA == CARG3 + | lgr CARG1, L:RB + | llgc CARG4, PC_OP + | stg PC, SAVE_PC + | brasl r14, extern lj_meta_comp // (lua_State *L, TValue *o1, *o2, int op) + | // 0/1 or TValue * (metamethod) returned in r2 (CRET1). + |3: + | lgr RC, CRET1 + | lg BASE, L:RB->base + | clgfi RC, 1 + | jh ->vmeta_binop + |4: + | la PC, 4(PC) + | jl >6 + |5: + | llgh RD, PC_RD + | branchPC RD + |6: + | ins_next + | + |->cont_condt: // BASE = base, RC = result + | la PC, 4(PC) + | lg ITYPE, 0(RC) + | srag ITYPE, ITYPE, 47 + | lghi TMPR0, LJ_TISTRUECOND + | clr ITYPE, TMPR0 // Branch if result is true. + | jl <5 + | j <6 + | + |->cont_condf: // BASE = base, RC = result + | lg ITYPE, 0(RC) + | srag ITYPE, ITYPE, 47 + | lghi TMPR0, LJ_TISTRUECOND + | clr ITYPE, TMPR0 // Branch if result is false. + | j <4 + | + |->vmeta_equal: + | cleartp TAB:RD + | lay PC, -4(PC) + | lgr CARG2, RA + | lgfr CARG4, RB + | lg L:RB, SAVE_L + | stg BASE, L:RB->base + | lgr CARG3, RD + | lgr CARG1, L:RB + | stg PC, SAVE_PC + | brasl r14, extern lj_meta_equal // (lua_State *L, GCobj *o1, *o2, int ne) + | // 0/1 or TValue * (metamethod) returned in r2 (CRET1). + | j <3 + | + |->vmeta_equal_cd: + |.if FFI + | lay PC, -4(PC) + | lg L:RB, SAVE_L + | stg BASE, L:RB->base + | lgr CARG1, L:RB + | llgf CARG2, -4(PC) + | stg PC, SAVE_PC + | brasl r14, extern lj_meta_equal_cd // (lua_State *L, BCIns ins) + | // 0/1 or TValue * (metamethod) returned in r2 (CRET1). + | j <3 + |.endif + | + |->vmeta_istype: + | lg L:RB, SAVE_L + | stg BASE, L:RB->base + | llgfr CARG2, RA + | llgfr CARG3, RD // Caveat: CARG3 == RA. + | lgr L:CARG1, L:RB + | stg PC, SAVE_PC + | brasl r14, extern lj_meta_istype // (lua_State *L, BCReg ra, BCReg tp) + | lg BASE, L:RB->base + | j <6 + | + |//-- Arithmetic metamethods --------------------------------------------- + | + |->vmeta_arith_vno: + | llgc RB, PC_RB + | llgc RC, PC_RC + |->vmeta_arith_vn: + | sllg RB, RB, 3 + | sllg RC, RC, 3 + | la RB, 0(RB, BASE) + | la RC, 0(RC, KBASE) + | j >1 + | + |->vmeta_arith_nvo: + | llgc RC, PC_RC + | llgc RB, PC_RB + |->vmeta_arith_nv: + | sllg RC, RC, 3 + | sllg RB, RB, 3 + | la TMPR1, 0(RC, KBASE) + | la RC, 0(RB, BASE) + | lgr RB, TMPR1 + | j >1 + | + |->vmeta_unm: + | llgh RD, PC_RD + | sllg RD, RD, 3 + | la RC, 0(RD, BASE) + | lgr RB, RC + | j >1 + | + |->vmeta_arith_vvo: + | llgc RB, PC_RB + | llgc RC, PC_RC + |->vmeta_arith_vv: + | sllg RC, RC, 3 + | sllg RB, RB, 3 + | la RB, 0(RB, BASE) + | la RC, 0(RC, BASE) + |1: + | llgc RA, PC_RA + | sllg RA, RA, 3 + | la RA, 0(RA, BASE) + | llgc CARG5, PC_OP // Caveat: CARG5 == RD. + | lgr CARG2, RA + | lgr CARG3, RB // Caveat: CARG3 == RA. + | // lgr CARG4, RC // Caveat: CARG4 == RC (nop, so commented out). + | lg L:CARG1, SAVE_L + | stg BASE, L:CARG1->base + | lgr L:RB, L:CARG1 + | stg PC, SAVE_PC + | brasl r14, extern lj_meta_arith // (lua_State *L, TValue *ra,*rb,*rc, BCReg op) + | // NULL (finished) or TValue * (metamethod) returned in r2 (CRET1). + | lg BASE, L:RB->base + | cghi CRET1, 0 + | lgr RC, CRET1 + | je ->cont_nop + | + | // Call metamethod for binary op. + |->vmeta_binop: + | // BASE = base, RC = new base, stack = cont/func/o1/o2 + | lgr RA, RC + | sgr RC, BASE + | stg PC, -24(RA) // [cont|PC] + | la PC, FRAME_CONT(RC) + | lghi NARGS:RD, 2+1 // 2 args for func(o1, o2). + | j ->vm_call_dispatch + | + |->vmeta_len: + | llgh RD, PC_RD + | sllg RD, RD, 3 + | lg L:RB, SAVE_L + | stg BASE, L:RB->base + | la CARG2, 0(RD, BASE) + | lgr L:CARG1, L:RB + | stg PC, SAVE_PC + | brasl r14, extern lj_meta_len // (lua_State *L, TValue *o) + | // NULL (retry) or TValue * (metamethod) returned in r2 (CRET1). + | lgr RC, CRET1 + | lg BASE, L:RB->base +#if LJ_52 + | cghi RC, 0 + | jne ->vmeta_binop // Binop call for compatibility. + | llgh RD, PC_RD + | sllg RD, RD, 3 + | lg TAB:CARG1, 0(RD, BASE) + | cleartp TAB:CARG1 + | j ->BC_LEN_Z +#else + | j ->vmeta_binop // Binop call for compatibility. +#endif + | + |//-- Call metamethod ---------------------------------------------------- + | + |->vmeta_call_ra: + | la RA, 16(RA, BASE) // RA previously set to RA*8. + |->vmeta_call: // Resolve and call __call metamethod. + | // BASE = old base, RA = new base, RC = nargs+1, PC = return + | stg NARGS:RD, SAVE_TMP // Save RA, RC for us (not sure about this). + | lgr RB, RA + | lg L:CARG1, SAVE_L + | stg BASE, L:CARG1->base + | lay CARG2, -16(RA) + | sllg RD, RD, 3 + | lay CARG3, -8(RA, RD) // Caveat: CARG3 == RA. + | stg PC, SAVE_PC + | brasl r14, extern lj_meta_call // (lua_State *L, TValue *func, TValue *top) + | lgr RA, RB + | lg L:RB, SAVE_L + | lg BASE, L:RB->base + | lg NARGS:RD, SAVE_TMP + | lg LFUNC:RB, -16(RA) + | aghi NARGS:RD, 1 // 32-bit on x64. + | // This is fragile. L->base must not move, KBASE must always be defined. + | cgr KBASE, BASE // Continue with CALLT if flag set. + | je ->BC_CALLT_Z + | cleartp LFUNC:RB + | lgr BASE, RA + | ins_call // Otherwise call resolved metamethod. + | + |//-- Argument coercion for 'for' statement ------------------------------ + | + |->vmeta_for: + | lg L:RB, SAVE_L + | stg BASE, L:RB->base + | lgr CARG2, RA + | lgr CARG1, RB + | stg PC, SAVE_PC + | brasl r14, extern lj_meta_for // (lua_State *L, TValue *base) + | lg BASE, L:RB->base + | llgc OP, PC_OP + | llgc RA, PC_RA + | llgh RD, PC_RD + | sllg TMPR1, OP, 3 + | lg TMPR1, GG_DISP2STATIC(TMPR1, DISPATCH) // Retry FORI or JFORI. + | br TMPR1 + | + |//----------------------------------------------------------------------- + |//-- Fast functions ----------------------------------------------------- + |//----------------------------------------------------------------------- + | + |.macro .ffunc, name + |->ff_ .. name: + |.endmacro + | + |.macro .ffunc_1, name + |->ff_ .. name: + | clfi NARGS:RD, 1+1; jl ->fff_fallback + |.endmacro + | + |.macro .ffunc_2, name + |->ff_ .. name: + | clfi NARGS:RD, 2+1; jl ->fff_fallback + |.endmacro + | + |.macro .ffunc_n, name, op + | .ffunc_1 name + | lg TMPR0, 0(BASE) + | checknumtp TMPR0, ->fff_fallback + | op f0, 0(BASE) + |.endmacro + | + |.macro .ffunc_n, name + | .ffunc_n name, ld + |.endmacro + | + |.macro .ffunc_nn, name + | .ffunc_2 name + | lg TMPR1, 0(BASE) + | lg TMPR0, 8(BASE) + | ld FARG1, 0(BASE) + | ld FARG2, 8(BASE) + | checknumtp TMPR1, ->fff_fallback + | checknumtp TMPR0, ->fff_fallback + |.endmacro + | + |// Inlined GC threshold check. Caveat: uses label 1. + |.macro ffgccheck + | lg RB, (DISPATCH_GL(gc.total))(DISPATCH) + | clg RB, (DISPATCH_GL(gc.threshold))(DISPATCH) + | jl >1 + | brasl r14, ->fff_gcstep + |1: + |.endmacro + | + |//-- Base library: checks ----------------------------------------------- + | + |.ffunc_1 assert + | lg RB, 0(BASE) + | srag ITYPE, RB, 47 + | clfi ITYPE, LJ_TISTRUECOND; jhe ->fff_fallback + | lg PC, -8(BASE) + | st RD, SAVE_MULTRES + | lg RB, 0(BASE) + | stg RB, -16(BASE) + | ahi RD, -2 + | je >2 + | lgr RA, BASE + |1: + | la RA, 8(RA) + | lg RB, 0(RA) + | stg RB, -16(RA) + | brct RD, <1 + |2: + | llgf RD, SAVE_MULTRES + | j ->fff_res_ + | + |.ffunc_1 type + | lg RC, 0(BASE) + | srag RC, RC, 47 + | lghi RB, LJ_TISNUM + | clgr RC, RB + | jnl >1 + | lgr RC, RB + |1: + | lghi TMPR0, -1 + | xgr RC, TMPR0 + |2: + | lg CFUNC:RB, -16(BASE) + | cleartp CFUNC:RB + | sllg RC, RC, 3 + | lg STR:RC, ((char *)(&((GCfuncC *)0)->upvalue))(RC, CFUNC:RB) + | lg PC, -8(BASE) + | settp STR:RC, LJ_TSTR + | stg STR:RC, -16(BASE) + | j ->fff_res1 + | + |//-- Base library: getters and setters --------------------------------- + | + |.ffunc_1 getmetatable + | lg TAB:RB, 0(BASE) + | lg PC, -8(BASE) + | checktab TAB:RB, >6 + |1: // Field metatable must be at same offset for GCtab and GCudata! + | lg TAB:RB, TAB:RB->metatable + |2: + | lghi TMPR0, LJ_TNIL + | stg TMPR0, -16(BASE) + | cghi TAB:RB, 0 + | je ->fff_res1 + | settp TAB:RC, TAB:RB, LJ_TTAB + | stg TAB:RC, -16(BASE) // Store metatable as default result. + | lg STR:RC, (DISPATCH_GL(gcroot)+8*(GCROOT_MMNAME+MM_metatable))(DISPATCH) + | llgf RA, TAB:RB->hmask + | n RA, STR:RC->hash + | settp STR:RC, LJ_TSTR + | mghi RA, #NODE + | ag NODE:RA, TAB:RB->node + |3: // Rearranged logic, because we expect _not_ to find the key. + | cg STR:RC, NODE:RA->key + | je >5 + |4: + | ltg NODE:RA, NODE:RA->next + | jne <3 + | j ->fff_res1 // Not found, keep default result. + |5: + | lg RB, NODE:RA->val + | cghi RB, LJ_TNIL; je ->fff_res1 // Ditto for nil value. + | stg RB, -16(BASE) // Return value of mt.__metatable. + | j ->fff_res1 + | + |6: + | clfi ITYPE, LJ_TUDATA; je <1 + | clfi ITYPE, LJ_TISNUM; jh >7 + | lhi ITYPE, LJ_TISNUM + |7: + | lhi TMPR0, -1 + | xr ITYPE, TMPR0 // not ITYPE + | llgfr ITYPE, ITYPE + | sllg ITYPE, ITYPE, 3 + | lg TAB:RB, (DISPATCH_GL(gcroot[GCROOT_BASEMT]))(ITYPE, DISPATCH) + | j <2 + | + |.ffunc_2 setmetatable + | lg TAB:RB, 0(BASE) + | lgr TAB:TMPR1, TAB:RB + | checktab TAB:RB, ->fff_fallback + | // Fast path: no mt for table yet and not clearing the mt. + | lghi TMPR0, 0 + | cg TMPR0, TAB:RB->metatable; jne ->fff_fallback + | lg TAB:RA, 8(BASE) + | checktab TAB:RA, ->fff_fallback + | stg TAB:RA, TAB:RB->metatable + | lg PC, -8(BASE) + | stg TAB:TMPR1, -16(BASE) // Return original table. + | tm TAB:RB->marked, LJ_GC_BLACK // isblack(table) + | je >1 + | // Possible write barrier. Table is black, but skip iswhite(mt) check. + | barrierback TAB:RB, RC + |1: + | j ->fff_res1 + | + |.ffunc_2 rawget + | lg TAB:CARG2, 0(BASE) + | checktab TAB:CARG2, ->fff_fallback + | la CARG3, 8(BASE) + | lg CARG1, SAVE_L + | brasl r14, extern lj_tab_get // (lua_State *L, GCtab *t, cTValue *key) + | // cTValue * returned in r2 (CRET1). + | // Copy table slot. + | lg RB, 0(CRET1) + | lg PC, -8(BASE) + | stg RB, -16(BASE) + | j ->fff_res1 + | + |//-- Base library: conversions ------------------------------------------ + | + |.ffunc tonumber + | // Only handles the number case inline (without a base argument). + | clfi NARGS:RD, 1+1; jne ->fff_fallback // Exactly one argument. + | lg RB, 0(BASE) + | checknumber RB, ->fff_fallback + | lg PC, -8(BASE) + | stg RB, -16(BASE) + | j ->fff_res1 + | + |.ffunc_1 tostring + | // Only handles the string or number case inline. + | lg PC, -8(BASE) + | lg STR:RB, 0(BASE) + | checktp_nc STR:RB, LJ_TSTR, >3 + | // A __tostring method in the string base metatable is ignored. + |2: + | stg STR:RB, -16(BASE) + | j ->fff_res1 + |3: // Handle numbers inline, unless a number base metatable is present. + | clfi ITYPE, LJ_TISNUM; jh ->fff_fallback_1 + | lghi TMPR0, 0 + | cg TMPR0, (DISPATCH_GL(gcroot[GCROOT_BASEMT_NUM]))(DISPATCH) + | jne ->fff_fallback + | ffgccheck // Caveat: uses label 1. + | lg L:RB, SAVE_L + | stg BASE, L:RB->base // Add frame since C call can throw. + | stg PC, SAVE_PC // Redundant (but a defined value). + | lgr CARG2, BASE // Otherwise: CARG2 == BASE + | lgr L:CARG1, L:RB + | brasl r14, extern lj_strfmt_number // (lua_State *L, cTValue *o) + | // GCstr returned in r2 (CRET1). + | lg BASE, L:RB->base + | settp STR:RB, CRET1, LJ_TSTR + | j <2 + | + |//-- Base library: iterators ------------------------------------------- + | + |.ffunc_1 next + | je >2 // Missing 2nd arg? + |1: + | lg CARG2, 0(BASE) + | checktab CARG2, ->fff_fallback + | lg L:RB, SAVE_L + | stg BASE, L:RB->base // Add frame since C call can throw. + | stg BASE, L:RB->top // Dummy frame length is ok. + | lg PC, -8(BASE) + | la CARG3, 8(BASE) + | lgr CARG1, L:RB + | stg PC, SAVE_PC // Needed for ITERN fallback. + | brasl r14, extern lj_tab_next // (lua_State *L, GCtab *t, TValue *key) + | // Flag returned in r2 (CRET1). + | lg BASE, L:RB->base + | ltr RD, CRET1; je >3 // End of traversal? + | // Copy key and value to results. + | lg RB, 8(BASE) + | lg RD, 16(BASE) + | stg RB, -16(BASE) + | stg RD, -8(BASE) + |->fff_res2: + | lghi RD, 1+2 + | j ->fff_res + |2: // Set missing 2nd arg to nil. + | lghi TMPR0, LJ_TNIL + | stg TMPR0, 8(BASE) + | j <1 + |3: // End of traversal: return nil. + | lghi TMPR0, LJ_TNIL + | stg TMPR0, -16(BASE) + | j ->fff_res1 + | + |.ffunc_1 pairs + | lg TAB:RB, 0(BASE) + | lgr TMPR1, TAB:RB + | checktab TAB:RB, ->fff_fallback +#if LJ_52 + | ltg TMPR0, TAB:RB->metatable; jne ->fff_fallback +#endif + | lg CFUNC:RD, -16(BASE) + | cleartp CFUNC:RD + | lg CFUNC:RD, CFUNC:RD->upvalue[0] + | settp CFUNC:RD, LJ_TFUNC + | lg PC, -8(BASE) + | stg CFUNC:RD, -16(BASE) + | stg TMPR1, -8(BASE) + | lghi TMPR0, LJ_TNIL + | stg TMPR0, 0(BASE) + | lghi RD, 1+3 + | j ->fff_res + | + |.ffunc_2 ipairs_aux + | lg TAB:RB, 0(BASE) + | checktab TAB:RB, ->fff_fallback + | lg RA, 8(BASE) + | checkint RA, ->fff_fallback + | lg PC, -8(BASE) + | aghi RA, 1 + | setint ITYPE, RA + | stg ITYPE, -16(BASE) + | cl RA, TAB:RB->asize; jhe >2 // Not in array part? + | lg RD, TAB:RB->array + | lgfr TMPR1, RA + | sllg TMPR1, TMPR1, 3 + | la RD, 0(TMPR1, RD) + |1: + | lg TMPR0, 0(RD) + | cghi TMPR0, LJ_TNIL; je ->fff_res0 + | // Copy array slot. + | stg TMPR0, -8(BASE) + | j ->fff_res2 + |2: // Check for empty hash part first. Otherwise call C function. + | lt TMPR0, TAB:RB->hmask; je ->fff_res0 + | lgr CARG1, TAB:RB + | lgfr CARG2, RA + | brasl r14, extern lj_tab_getinth // (GCtab *t, int32_t key) + | // cTValue * or NULL returned in r2 (CRET1). + | ltgr RD, CRET1 + | jne <1 + |->fff_res0: + | lghi RD, 1+0 + | j ->fff_res + | + |.ffunc_1 ipairs + | lg TAB:RB, 0(BASE) + | lgr TMPR1, TAB:RB + | checktab TAB:RB, ->fff_fallback +#if LJ_52 + | lghi TMPR0, 0 + | cg TMPR0, TAB:RB->metatable; jne ->fff_fallback +#endif + | lg CFUNC:RD, -16(BASE) + | cleartp CFUNC:RD + | lg CFUNC:RD, CFUNC:RD->upvalue[0] + | settp CFUNC:RD, LJ_TFUNC + | lg PC, -8(BASE) + | stg CFUNC:RD, -16(BASE) + | stg TMPR1, -8(BASE) + | llihf RD, LJ_TISNUM<<15 + | stg RD, 0(BASE) + | lghi RD, 1+3 + | j ->fff_res + | + |//-- Base library: catch errors ---------------------------------------- + | + |.ffunc_1 pcall + | la RA, 16(BASE) + | aghi NARGS:RD, -1 + | lghi PC, 16+FRAME_PCALL + |1: + | llgc RB, (DISPATCH_GL(hookmask))(DISPATCH) + | srlg RB, RB, HOOK_ACTIVE_SHIFT(r0) + | nill RB, 1 // High bits already zero (from load). + | agr PC, RB // Remember active hook before pcall. + | // Note: this does a (harmless) copy of the function to the PC slot, too. + | lgr KBASE, RD + |2: + | sllg TMPR1, KBASE, 3 + | lg RB, -24(TMPR1, RA) + | stg RB, -16(TMPR1, RA) + | aghi KBASE, -1 + | jh <2 + | j ->vm_call_dispatch + | + |.ffunc_2 xpcall + | lg LFUNC:RA, 8(BASE) + | checktp_nc LFUNC:RA, LJ_TFUNC, ->fff_fallback + | lg LFUNC:RB, 0(BASE) // Swap function and traceback. + | stg LFUNC:RA, 0(BASE) + | stg LFUNC:RB, 8(BASE) + | la RA, 24(BASE) + | aghi NARGS:RD, -2 + | lghi PC, 24+FRAME_PCALL + | j <1 + | + |//-- Coroutine library -------------------------------------------------- + | + |.macro coroutine_resume_wrap, resume + |.if resume + |.ffunc_1 coroutine_resume + | lg L:RB, 0(BASE) + | lgr L:TMPR0, L:RB // Save type for checktptp. + | cleartp L:RB + |.else + |.ffunc coroutine_wrap_aux + | lg CFUNC:RB, -16(BASE) + | cleartp CFUNC:RB + | lg L:RB, CFUNC:RB->upvalue[0].gcr + | cleartp L:RB + |.endif + | lg PC, -8(BASE) + | stg PC, SAVE_PC + | stg L:RB, SAVE_TMP + |.if resume + | checktptp L:TMPR0, LJ_TTHREAD, ->fff_fallback + |.endif + | ltg TMPR0, L:RB->cframe; jne ->fff_fallback + | cli L:RB->status, LUA_YIELD; jh ->fff_fallback + | lg RA, L:RB->top + | je >1 // Status != LUA_YIELD (i.e. 0)? + | cg RA, L:RB->base // Check for presence of initial func. + | je ->fff_fallback + | lg PC, -8(RA) // Move initial function up. + | stg PC, 0(RA) + | la RA, 8(RA) + |1: + | sllg TMPR1, NARGS:RD, 3 + |.if resume + | lay PC, -16(TMPR1, RA) // Check stack space (-1-thread). + |.else + | lay PC, -8(TMPR1, RA) // Check stack space (-1). + |.endif + | clg PC, L:RB->maxstack; jh ->fff_fallback + | stg PC, L:RB->top + | + | lg L:RB, SAVE_L + | stg BASE, L:RB->base + |.if resume + | la BASE, 8(BASE) // Keep resumed thread in stack for GC. + |.endif + | stg BASE, L:RB->top + |.if resume + | lay RB, -24(TMPR1, BASE) // RB = end of source for stack move. + |.else + | lay RB, -16(TMPR1, BASE) // RB = end of source for stack move. + |.endif + | sgr RB, PC // Relative to PC. + | + | cgr PC, RA + | je >3 + |2: // Move args to coroutine. + | lg RC, 0(RB, PC) + | stg RC, -8(PC) + | lay PC, -8(PC) + | cgr PC, RA + | jne <2 + |3: + | lgr CARG2, RA + | lg L:CARG1, SAVE_TMP + | lghi CARG3, 0 + | lghi CARG4, 0 + | brasl r14, ->vm_resume // (lua_State *L, TValue *base, 0, 0) + | + | lg L:RB, SAVE_L + | lg L:PC, SAVE_TMP + | lg BASE, L:RB->base + | stg L:RB, (DISPATCH_GL(cur_L))(DISPATCH) + | set_vmstate INTERP + | + | clfi CRET1, LUA_YIELD + | jh >8 + |4: + | lg RA, L:PC->base + | lg KBASE, L:PC->top + | stg RA, L:PC->top // Clear coroutine stack. + | lgr PC, KBASE + | sgr PC, RA + | je >6 // No results? + | la RD, 0(PC, BASE) + | llgfr PC, PC + | srlg PC, PC, 3 + | clg RD, L:RB->maxstack + | jh >9 // Need to grow stack? + | + | lgr RB, BASE + | sgr RB, RA + |5: // Move results from coroutine. + | lg RD, 0(RA) + | stg RD, 0(RA, RB) + | la RA, 8(RA) + | cgr RA, KBASE + | jne <5 + |6: + |.if resume + | la RD, 2(PC) // nresults+1 = 1 + true + results. + | load_true ITYPE // Prepend true to results. + | stg ITYPE, -8(BASE) + |.else + | la RD, 1(PC) // nresults+1 = 1 + results. + |.endif + |7: + | lg PC, SAVE_PC + | st RD, SAVE_MULTRES + |.if resume + | lghi RA, -8 + |.else + | lghi RA, 0 + |.endif + | tmll PC, FRAME_TYPE + | je ->BC_RET_Z + | j ->vm_return + | + |8: // Coroutine returned with error (at co->top-1). + |.if resume + | load_false ITYPE // Prepend false to results. + | stg ITYPE, -8(BASE) + | lg RA, L:PC->top + | aghi RA, -8 + | stg RA, L:PC->top // Clear error from coroutine stack. + | // Copy error message. + | lg RD, 0(RA) + | stg RD, 0(BASE) + | lghi RD, 1+2 // nresults+1 = 1 + false + error. + | j <7 + |.else + | lgr CARG2, L:PC + | lgr CARG1, L:RB + | brasl r14, extern lj_ffh_coroutine_wrap_err // (lua_State *L, lua_State *co) + | // Error function does not return. + |.endif + | + |9: // Handle stack expansion on return from yield. + | lg L:RA, SAVE_TMP + | stg KBASE, L:RA->top // Undo coroutine stack clearing. + | lgr CARG2, PC + | lgr CARG1, L:RB + | brasl r14, extern lj_state_growstack // (lua_State *L, int n) + | lg L:PC, SAVE_TMP + | lg BASE, L:RB->base + | j <4 // Retry the stack move. + |.endmacro + | + | coroutine_resume_wrap 1 // coroutine.resume + | coroutine_resume_wrap 0 // coroutine.wrap + | + |.ffunc coroutine_yield + | lg L:RB, SAVE_L + | lg TMPR0, L:RB->cframe + | tmll TMPR0, CFRAME_RESUME + | je ->fff_fallback + | stg BASE, L:RB->base + | sllg RD, NARGS:RD, 3 + | lay RD, -8(RD, BASE) + | stg RD, L:RB->top + | lghi RD, 0 + | stg RD, L:RB->cframe + | lghi CRET1, LUA_YIELD + | stc CRET1, L:RB->status + | j ->vm_leave_unw + | + |//-- Math library ------------------------------------------------------- + | + |.ffunc_1 math_abs + | lg RB, 0(BASE) + | checkint RB, >3 + | lpr RB, RB; jo >2 + |->fff_resbit: + |->fff_resi: + | setint RB + |->fff_resRB: + | lg PC, -8(BASE) + | stg RB, -16(BASE) + | j ->fff_res1 + |2: + | llihh RB, 0x41e0 // 2^31 + | j ->fff_resRB + |3: + | jh ->fff_fallback + | nihh RB, 0x7fff // Clear sign bit. + | lg PC, -8(BASE) + | stg RB, -16(BASE) + | j ->fff_res1 + | + |.ffunc_n math_sqrt, sqdb + |->fff_resf0: + | lg PC, -8(BASE) + | stdy f0, -16(BASE) + | // fallthrough + | + |->fff_res1: + | lghi RD, 1+1 + |->fff_res: + | st RD, SAVE_MULTRES + |->fff_res_: + | tmll PC, FRAME_TYPE + | jne >7 + |5: + | llgc TMPR1, PC_RB + | clgr TMPR1, RD // More results expected? + | jh >6 + | // Adjust BASE. KBASE is assumed to be set for the calling frame. + | llgc RA, PC_RA + | lcgr RA, RA + | sllg RA, RA, 3 + | lay BASE, -16(RA, BASE) // base = base - (RA+2)*8 + | ins_next + | + |6: // Fill up results with nil. + | sllg TMPR1, RD, 3 + | lghi TMPR0, LJ_TNIL + | stg TMPR0, -24(TMPR1, BASE) + | la RD, 1(RD) + | j <5 + | + |7: // Non-standard return case. + | lghi RA, -16 // Results start at BASE+RA = BASE-16. + | j ->vm_return + | + |.macro math_round, func + | .ffunc math_ .. func + | lg RB, 0(BASE) + | ld f0, 0(BASE) + | checknumx RB, ->fff_resRB, je + | jh ->fff_fallback + | brasl r14, ->vm_ .. func + | cfdbr RB, 0, f0 + | jo ->fff_resf0 + | llgfr RB, RB + | j ->fff_resi + |.endmacro + | + | math_round floor + | math_round ceil + | + |.ffunc math_log + | chi NARGS:RD, 1+1; jne ->fff_fallback // Exactly one argument. + | lg TMPR0, 0(BASE) + | ld FARG1, 0(BASE) + | checknumtp TMPR0, ->fff_fallback + | brasl r14, extern log + | j ->fff_resf0 + | + |.macro math_extern, func + | .ffunc_n math_ .. func + | brasl r14, extern func + | j ->fff_resf0 + |.endmacro + | + |.macro math_extern2, func + | .ffunc_nn math_ .. func + | brasl r14, extern func + | j ->fff_resf0 + |.endmacro + | + | 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 + | + |.ffunc_2 math_ldexp + | lg TMPR0, 0(BASE) + | ld FARG1, 0(BASE) + | lg CARG1, 8(BASE) + | checknumtp TMPR0, ->fff_fallback + | checkinttp CARG1, ->fff_fallback + | lgfr CARG1, CARG1 + | brasl r14, extern ldexp // (double, int) + | j ->fff_resf0 + | + |.ffunc_n math_frexp + | la CARG1, SAVE_TMP + | brasl r14, extern frexp + | llgf RB, SAVE_TMP + | lg PC, -8(BASE) + | stdy f0, -16(BASE) + | setint RB + | stg RB, -8(BASE) + | lghi RD, 1+2 + | j ->fff_res + | + |.ffunc_n math_modf + | lay CARG1, -16(BASE) + | brasl r14, extern modf // (double, double*) + | lg PC, -8(BASE) + | stdy f0, -8(BASE) + | lghi RD, 1+2 + | j ->fff_res + | + |.macro math_minmax, name, cjmp + | .ffunc name + | lghi RA, 2*8 + | sllg TMPR1, RD, 3 + | lg RB, 0(BASE) + | ld f0, 0(BASE) + | checkint RB, >4 + |1: // Handle integers. + | clgr RA, TMPR1; jhe ->fff_resRB + | lg TMPR0, -8(RA, BASE) + | checkint TMPR0, >3 + | cr RB, TMPR0 + | cjmp >2 + | lgr RB, TMPR0 + |2: + | aghi RA, 8 + | j <1 + |3: + | jh ->fff_fallback + | // Convert intermediate result to number and continue below. + | cdfbr f0, RB + | ldgr f1, TMPR0 + | j >6 + |4: + | jh ->fff_fallback + |5: // Handle numbers or integers. + | clgr RA, TMPR1; jhe ->fff_resf0 + | lg RB, -8(RA, BASE) + | ldy f1, -8(RA, BASE) + | checknumx RB, >6, jl + | jh ->fff_fallback + | cdfbr f1, RB + |6: + | cdbr f0, f1 + | cjmp >7 + | ldr f0, f1 + |7: + | aghi RA, 8 + | j <5 + |.endmacro + | + | math_minmax math_min, jnh + | math_minmax math_max, jnl + | + |//-- String library ----------------------------------------------------- + | + |.ffunc string_byte // Only handle the 1-arg case here. + | chi NARGS:RD, 1+1; jne ->fff_fallback + | lg STR:RB, 0(BASE) + | checkstr STR:RB, ->fff_fallback + | lg PC, -8(BASE) + | ltg TMPR0, STR:RB->len + | je ->fff_res0 // Return no results for empty string. + | llgc RB, STR:RB[1] + | j ->fff_resi + | + |.ffunc string_char // Only handle the 1-arg case here. + | ffgccheck + | chi NARGS:RD, 1+1; jne ->fff_fallback // *Exactly* 1 arg. + | lg RB, 0(BASE) + | checkint RB, ->fff_fallback + | clfi RB, 255; jh ->fff_fallback + | strvh RB, SAVE_TMP // Store [c,0]. + | lghi TMPR1, 1 + | la RD, SAVE_TMP // Points to stack. Little-endian. + |->fff_newstr: + | lg L:RB, SAVE_L + | stg BASE, L:RB->base + | llgfr CARG3, TMPR1 // Zero-extended to size_t. + | lgr CARG2, RD + | lgr CARG1, L:RB + | stg PC, SAVE_PC + | brasl r14, extern lj_str_new // (lua_State *L, char *str, size_t l) + |->fff_resstr: + | // GCstr * returned in r2 (CRET1). + | lgr STR:RD, CRET1 + | lg BASE, L:RB->base + | lg PC, -8(BASE) + | settp STR:RD, LJ_TSTR + | stg STR:RD, -16(BASE) + | j ->fff_res1 + | + |.ffunc string_sub + | ffgccheck + | lghi TMPR1, -1 + | clfi NARGS:RD, 1+2; jl ->fff_fallback + | jnh >1 + | lg TMPR1, 16(BASE) + | checkint TMPR1, ->fff_fallback + |1: + | lg STR:RB, 0(BASE) + | checkstr STR:RB, ->fff_fallback + | lg ITYPE, 8(BASE) + | lgfr RA, ITYPE + | srag ITYPE, ITYPE, 47 + | cghi ITYPE, LJ_TISNUM + | jne ->fff_fallback + | llgf RC, STR:RB->len + | clr RC, TMPR1 // len < end? (unsigned compare) + | jl >5 + |2: + | cghi RA, 0 // start <= 0? + | jle >7 + |3: + | sr TMPR1, RA // start > end? + | jnhe ->fff_emptystr + | la RD, (#STR-1)(RA, STR:RB) + | ahi TMPR1, 1 + |4: + | j ->fff_newstr + | + |5: // Negative end or overflow. + | chi TMPR1, 0 + | jnl >6 + | ahi TMPR1, 1 + | ar TMPR1, RC // end = end+(len+1) + | j <2 + |6: // Overflow. + | lr TMPR1, RC // end = len + | j <2 + | + |7: // Negative start or underflow. + | je >8 + | agr RA, RC // start = start+(len+1) + | aghi RA, 1 + | jh <3 // start > 0? + |8: // Underflow. + | lghi RA, 1 // start = 1 + | j <3 + | + |->fff_emptystr: // Range underflow. + | lghi TMPR1, 0 + | j <4 + | + |.macro ffstring_op, name + | .ffunc_1 string_ .. name + | ffgccheck + | lg STR:CARG2, 0(BASE) + | checkstr STR:CARG2, ->fff_fallback + | lg L:RB, SAVE_L + | lay SBUF:CARG1, (DISPATCH_GL(tmpbuf))(DISPATCH) + | stg BASE, L:RB->base + | lg RC, SBUF:CARG1->b + | stg L:RB, SBUF:CARG1->L + | stg RC, SBUF:CARG1->p + | stg PC, SAVE_PC + | brasl r14, extern lj_buf_putstr_ .. name + | // lgr CARG1, CRET1 (nop, CARG1==CRET1) + | brasl r14, extern lj_buf_tostr + | j ->fff_resstr + |.endmacro + | + |ffstring_op reverse + |ffstring_op lower + |ffstring_op upper + | + |//-- Bit library -------------------------------------------------------- + | + |.macro .ffunc_bit, name, kind, fdef + | fdef name + |.if kind == 2 + | bfpconst_tobit f1, RB + |.endif + | lg RB, 0(BASE) + | ld f0, 0(BASE) + | checkint RB, >1 + |.if kind > 0 + | j >2 + |.else + | j ->fff_resbit + |.endif + |1: + | jh ->fff_fallback + |.if kind < 2 + | bfpconst_tobit f1, RB + |.endif + | adbr f0, f1 + | lgdr RB, f0 + | llgfr RB, RB + |2: + |.endmacro + | + |.macro .ffunc_bit, name, kind + | .ffunc_bit name, kind, .ffunc_1 + |.endmacro + | + |.ffunc_bit bit_tobit, 0 + | j ->fff_resbit + | + |.macro .ffunc_bit_op, name, ins + | .ffunc_bit name, 2 + | lgr TMPR1, NARGS:RD // Save for fallback. + | sllg RD, NARGS:RD, 3 + | lay RD, -16(RD, BASE) + |1: + | clgr RD, BASE + | jle ->fff_resbit + | lg RA, 0(RD) + | checkint RA, >2 + | ins RB, RA + | aghi RD, -8 + | j <1 + |2: + | jh ->fff_fallback_bit_op + | ldgr f0, RA + | adbr f0, f1 + | lgdr RA, f0 + | ins RB, RA + | aghi RD, -8 + | j <1 + |.endmacro + | + |.ffunc_bit_op bit_band, nr + |.ffunc_bit_op bit_bor, or + |.ffunc_bit_op bit_bxor, xr + | + |.ffunc_bit bit_bswap, 1 + | lrvr RB, RB + | j ->fff_resbit + | + |.ffunc_bit bit_bnot, 1 + | xilf RB, -1 + | j ->fff_resbit + | + |->fff_fallback_bit_op: + | lgr NARGS:RD, TMPR1 // Restore for fallback + | j ->fff_fallback + | + |.macro .ffunc_bit_sh, name, ins + | .ffunc_bit name, 1, .ffunc_2 + | // Note: no inline conversion from number for 2nd argument! + | lg RA, 8(BASE) + | checkint RA, ->fff_fallback + | nill RA, 0x1f // Limit shift to 5-bits. + | ins RB, 0(RA) + | j ->fff_resbit + |.endmacro + | + |.ffunc_bit_sh bit_lshift, sll + |.ffunc_bit_sh bit_rshift, srl + |.ffunc_bit_sh bit_arshift, sra + | + |.ffunc_bit bit_rol, 1, .ffunc_2 + | // Note: no inline conversion from number for 2nd argument! + | lg RA, 8(BASE) + | checkint RA, ->fff_fallback + | rll RB, RB, 0(RA) + | j ->fff_resbit + | + |.ffunc_bit bit_ror, 1, .ffunc_2 + | // Note: no inline conversion from number for 2nd argument! + | lg RA, 8(BASE) + | checkint RA, ->fff_fallback + | lcr RA, RA // Right rotate equivalent to negative left rotate. + | rll RB, RB, 0(RA) + | j ->fff_resbit + | + |//----------------------------------------------------------------------- + | + |->fff_fallback_2: + | lghi NARGS:RD, 1+2 // Other args are ignored, anyway. + | j ->fff_fallback + |->fff_fallback_1: + | lghi NARGS:RD, 1+1 // Other args are ignored, anyway. + |->fff_fallback: // Call fast function fallback handler. + | // BASE = new base, RD = nargs+1 + | lg L:RB, SAVE_L + | lg PC, -8(BASE) // Fallback may overwrite PC. + | stg PC, SAVE_PC // Redundant (but a defined value). + | stg BASE, L:RB->base + | sllg RD, NARGS:RD, 3 + | lay RD, -8(RD, BASE) + | la RA, (8*LUA_MINSTACK)(RD) // Ensure enough space for handler. + | stg RD, L:RB->top + | lg CFUNC:RD, -16(BASE) + | cleartp CFUNC:RD + | clg RA, L:RB->maxstack + | jh >5 // Need to grow stack. + | lgr CARG1, L:RB + | lg TMPR1, CFUNC:RD->f + | basr r14, TMPR1 // (lua_State *L) + | lg BASE, L:RB->base + | // Either throws an error, or recovers and returns -1, 0 or nresults+1. + | lgr RD, CRET1 + | cghi RD, 0; jh ->fff_res // Returned nresults+1? + |1: + | lg RA, L:RB->top + | sgr RA, BASE + | srlg RA, RA, 3 + | cghi RD, 0 + | la NARGS:RD, 1(RA) + | lg LFUNC:RB, -16(BASE) + | jne ->vm_call_tail // Returned -1? + | cleartp LFUNC:RB + | ins_callt // Returned 0: retry fast path. + | + |// Reconstruct previous base for vmeta_call during tailcall. + |->vm_call_tail: + | lgr RA, BASE + | tmll PC, FRAME_TYPE + | jne >3 + | llgc RB, PC_RA + | lcgr RB, RB + | sllg RB, RB, 3 + | lay BASE, -16(RB, BASE) // base = base - (RB+2)*8 + | j ->vm_call_dispatch // Resolve again for tailcall. + |3: + | lgr RB, PC + | nill RB, -8 + | sgr BASE, RB + | j ->vm_call_dispatch // Resolve again for tailcall. + | + |5: // Grow stack for fallback handler. + | lghi CARG2, LUA_MINSTACK + | lgr CARG1, L:RB + | brasl r14, extern lj_state_growstack // (lua_State *L, int n) + | lg BASE, L:RB->base + | lghi RD, 0 // Simulate a return 0. + | j <1 // Dumb retry (goes through ff first). + | + |->fff_gcstep: // Call GC step function. + | // BASE = new base, RD = nargs+1 + | stg r14, SAVE_TMP // Save return address + | lg L:RB, SAVE_L + | stg PC, SAVE_PC // Redundant (but a defined value). + | stg BASE, L:RB->base + | sllg RD, NARGS:RD, 3 + | lay RD, -8(RD, BASE) + | lgr CARG1, L:RB + | stg RD, L:RB->top + | brasl r14, extern lj_gc_step // (lua_State *L) + | lg BASE, L:RB->base + | lg RD, L:RB->top + | sgr RD, BASE + | srlg RD, RD, 3 + | aghi NARGS:RD, 1 + | lg r14, SAVE_TMP // Restore return address. + | br r14 + | + |//----------------------------------------------------------------------- + |//-- Special dispatch targets ------------------------------------------- + |//----------------------------------------------------------------------- + | + |->vm_record: // Dispatch target for recording phase. + | stg r0, 0 + | stg r0, 0 + | + |->vm_rethook: // Dispatch target for return hooks. + | llgc RD, (DISPATCH_GL(hookmask))(DISPATCH) + | tmll RD, HOOK_ACTIVE + | jne >5 + | j >1 + | + |->vm_inshook: // Dispatch target for instr/line hooks. + | llgc RD, (DISPATCH_GL(hookmask))(DISPATCH) + | tmll RD, HOOK_ACTIVE // Hook already active? + | jne >5 + | + | tmll RD, LUA_MASKLINE|LUA_MASKCOUNT + | je >5 + | ly TMPR0, (DISPATCH_GL(hookcount))(DISPATCH) + | ahi TMPR0, -1 + | sty TMPR0, (DISPATCH_GL(hookcount))(DISPATCH) + | je >1 + | tmll RD, LUA_MASKLINE + | je >5 + |1: + | lg L:RB, SAVE_L + | stg BASE, L:RB->base + | lgr CARG2, PC + | lgr CARG1, L:RB + | // SAVE_PC must hold the _previous_ PC. The callee updates it with PC. + | brasl r14, extern lj_dispatch_ins // (lua_State *L, const BCIns *pc) + |3: + | lg BASE, L:RB->base + |4: + | llgc RA, PC_RA + |5: + | llgc OP, PC_OP + | sllg TMPR1, OP, 3 + | llgh RD, PC_RD + | lg TMPR1, GG_DISP2STATIC(TMPR1, DISPATCH) + | br TMPR1 + | + |->cont_hook: // Continue from hook yield. + | stg r0, 0 + | stg r0, 0 + | + |->vm_hotloop: // Hot loop counter underflow. + | stg r0, 0 + | stg r0, 0 + | + |->vm_callhook: // Dispatch target for call hooks. + | stg PC, SAVE_PC + |.if JIT + | j >1 + |.endif + | + |->vm_hotcall: // Hot call counter underflow. + |.if JIT + | stg PC, SAVE_PC + | oill PC, 1 // Marker for hot call. + |1: + |.endif + | sllg RD, NARGS:RD, 3 + | lay RD, -8(RD, BASE) + | lg L:RB, SAVE_L + | stg BASE, L:RB->base + | stg RD, L:RB->top + | lgr CARG2, PC + | lgr CARG1, L:RB + | brasl r14, extern lj_dispatch_call // (lua_State *L, const BCIns *pc) + | // ASMFunction returned in r2 (CRET1). + | lghi TMPR0, 0 + | stg TMPR0, SAVE_PC // Invalidate for subsequent line hook. + |.if JIT + | nill PC, -2 + |.endif + | lg BASE, L:RB->base + | lg RD, L:RB->top + | sgr RD, BASE + | lgr RB, CRET1 + | llgc RA, PC_RA + | srl RD, 3 + | ahi NARGS:RD, 1 + | llgfr RD, RD + | br RB + | + |->cont_stitch: // Trace stitching. + | stg r0, 0 + | stg r0, 0 + | + |->vm_profhook: // Dispatch target for profiler hook. + | stg r0, 0 + | stg r0, 0 + | + |//----------------------------------------------------------------------- + |//-- Trace exit handler ------------------------------------------------- + |//----------------------------------------------------------------------- + | + |// Called from an exit stub with the exit number on the stack. + |// The 16 bit exit number is stored with two (sign-extended) push imm8. + |->vm_exit_handler: + | stg r0, 0 + | stg r0, 0 + |->vm_exit_interp: + | stg r0, 0 + | stg r0, 0 + | + |//----------------------------------------------------------------------- + |//-- Math helper functions ---------------------------------------------- + |//----------------------------------------------------------------------- + | + |// FP value rounding. Called by math.floor/math.ceil fast functions. + |// Value to round is in f0. May clobber f0-f7 and r0. Return address is r14. + |.macro vm_round, name, mask + |->name: + | lghi r0, 1 + | cdfbr f1, r0 + | didbr f0, f2, f1, mask // f0=remainder, f2=quotient. + | jnle >1 + | ldr f0, f2 + | br r14 + |1: // partial remainder (sanity check) + | stg r0, 0 + |.endmacro + | + | vm_round vm_floor, 7 // Round towards -inf. + | vm_round vm_ceil, 6 // Round towards +inf. + | vm_round vm_trunc, 5 // Round towards 0. + | + |// FP modulo x%y. Called by BC_MOD* and vm_arith. + |->vm_mod: // NYI. + | stg r0, 0 + | stg r0, 0 + | + |//----------------------------------------------------------------------- + |//-- Assertions --------------------------------------------------------- + |//----------------------------------------------------------------------- + | + |->assert_bad_for_arg_type: + | stg r0, 0 + | stg r0, 0 +#ifdef LUA_USE_ASSERT +#endif + | + |//----------------------------------------------------------------------- + |//-- FFI helper functions ----------------------------------------------- + |//----------------------------------------------------------------------- + | + |// Handler for callback functions. Callback slot number in ah/al. + |->vm_ffi_callback: + | stg r0, 0 + | stg r0, 0 + | + |->cont_ffi_callback: // Return from FFI callback. + | stg r0, 0 + | stg r0, 0 + | + |->vm_ffi_call: // Call C function via FFI. + | // Caveat: needs special frame unwinding, see below. + |.if FFI + | .type CCSTATE, CCallState, r8 + | stmg r6, r15, 48(sp) + | lgr r13, sp // Use r13 as frame pointer. + | lgr CCSTATE, CARG1 + | lg r7, CCSTATE->func + | + | // Readjust stack. + | sgf sp, CCSTATE->spadj + | + | // Copy stack slots. + | llgc r1, CCSTATE->nsp + | chi r1, 0 + | jh >2 + |1: + | lmg CARG1, CARG5, CCSTATE->gpr[0] + | // TODO: conditionally load FPRs? + | ld FARG1, CCSTATE->fpr[0] + | ld FARG2, CCSTATE->fpr[1] + | ld FARG3, CCSTATE->fpr[2] + | ld FARG4, CCSTATE->fpr[3] + | basr r14, r7 + | + | stg CRET1, CCSTATE->gpr[0] + | std f0, CCSTATE->fpr[0] + | + | lgr sp, r13 + | lmg r6, r15, 48(sp) + | br r14 + | + |2: + | sll r1, 3 + | la r10, (offsetof(CCallState, stack))(CCSTATE) // Source. + | la r11, (CCALL_SPS_EXTRA*8)(sp) // Destination. + |3: + | chi r1, 256 + | jl >4 + | mvc 0(256, r11), 0(r10) + | la r10, 256(r10) + | la r11, 256(r11) + | ahi r1, -256 + | j <3 + | + |4: + | ahi r1, -1 + | jl <1 + | larl r9, >5 + | ex r1, 0(r9) + | j <1 + | + |5: + | // exrl target + | mvc 0(1, r11), 0(r10) + |.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; + (void)vk; + |// Note: aligning all instructions does not pay off. + |=>defop: + + switch (op) { + + /* -- Comparison ops ---------------------------------------------------- */ + + /* Remember: all ops branch for a true comparison, fall through otherwise. */ + + |.macro jmp_comp, lt, ge, le, gt, target + ||switch (op) { + ||case BC_ISLT: + | lt target + ||break; + ||case BC_ISGE: + | ge target + ||break; + ||case BC_ISLE: + | le target + ||break; + ||case BC_ISGT: + | gt target + ||break; + ||default: break; /* Shut up GCC. */ + ||} + |.endmacro + + case BC_ISLT: case BC_ISGE: case BC_ISLE: case BC_ISGT: + | // RA = src1, RD = src2, JMP with RD = target + | ins_AD + | sllg RA, RA, 3 + | sllg RD, RD, 3 + | ld f0, 0(RA, BASE) + | ld f1, 0(RD, BASE) + | lg RA, 0(RA, BASE) + | lg RD, 0(RD, BASE) + | srag ITYPE, RA, 47 + | srag RB, RD, 47 + | + | clfi ITYPE, LJ_TISNUM; jne >7 + | clfi RB, LJ_TISNUM; jne >8 + | // Both are integers. + | la PC, 4(PC) + | cr RA, RD + | jmp_comp jhe, jl, jh, jle, >9 + |6: + | llgh RD, PC_RD + | branchPC RD + |9: + | ins_next + | + |7: // RA is not an integer. + | jh ->vmeta_comp + | // RA is a number. + | clfi RB, LJ_TISNUM; jl >1; jne ->vmeta_comp + | // RA is a number, RD is an integer. + | cdfbr f1, RD + | j >1 + | + |8: // RA is an integer, RD is not an integer. + | jh ->vmeta_comp + | // RA is an integer, RD is a number. + | cdfbr f0, RA + |1: + | la PC, 4(PC) + | cdbr f0, f1 + | // To preserve NaN semantics GE/GT branch on unordered, but LT/LE don't. + | jmp_comp jnl, jl, jnle, jle, <9 + | j <6 + break; + + case BC_ISEQV: case BC_ISNEV: + vk = op == BC_ISEQV; + | ins_AD // RA = src1, RD = src2, JMP with RD = target + | sllg RD, RD, 3 + | ld f1, 0(RD, BASE) + | lg RD, 0(RD, BASE) + | sllg RA, RA, 3 + | ld f0, 0(RA, BASE) + | lg RA, 0(RA, BASE) + | la PC, 4(PC) + | srag RB, RD, 47 + | srag ITYPE, RA, 47 + | clfi RB, LJ_TISNUM; jne >7 + | clfi ITYPE, LJ_TISNUM; jne >8 + | cr RD, RA + if (vk) { + | jne >9 + } else { + | je >9 + } + | llgh RD, PC_RD + | branchPC RD + |9: + | ins_next + | + |7: // RD is not an integer. + | jh >5 + | // RD is a number. + | clfi ITYPE, LJ_TISNUM; jl >1; jne >5 + | // RD is a number, RA is an integer. + | cdfbr f0, RA + | j >1 + | + |8: // RD is an integer, RA is not an integer. + | jh >5 + | // RD is an integer, RA is a number. + | cdfbr f1, RD + | j >1 + | + |1: + | cdbr f0, f1 + |4: + iseqne_fp: + if (vk) { + | jne >2 // Unordered means not equal. + } else { + | je >1 // Unordered means not equal. + } + iseqne_end: + if (vk) { + |1: // EQ: Branch to the target. + | llgh RD, PC_RD + | branchPC RD + |2: // NE: Fallthrough to next instruction. + |.if not FFI + |3: + |.endif + } else { + |.if not FFI + |3: + |.endif + |2: // NE: Branch to the target. + | llgh RD, PC_RD + | branchPC RD + |1: // EQ: Fallthrough to next instruction. + } + if (LJ_DUALNUM && (op == BC_ISEQV || op == BC_ISNEV || + op == BC_ISEQN || op == BC_ISNEN)) { + | j <9 + } else { + | ins_next + } + | + if (op == BC_ISEQV || op == BC_ISNEV) { + |5: // Either or both types are not numbers. + |.if FFI + | clfi RB, LJ_TCDATA; je ->vmeta_equal_cd + | clfi ITYPE, LJ_TCDATA; je ->vmeta_equal_cd + |.endif + | cgr RA, RD + | je <1 // Same GCobjs or pvalues? + | cr RB, ITYPE + | jne <2 // Not the same type? + | clfi RB, LJ_TISTABUD + | jh <2 // Different objects and not table/ud? + | + | // Different tables or userdatas. Need to check __eq metamethod. + | // Field metatable must be at same offset for GCtab and GCudata! + | cleartp TAB:RA + | lg TAB:RB, TAB:RA->metatable + | cghi TAB:RB, 0 + | je <2 // No metatable? + | tm TAB:RB->nomm, 1<<MM_eq + | jne <2 // Or 'no __eq' flag set? + if (vk) { + | lghi RB, 0 // ne = 0 + } else { + | lghi RB, 1 // ne = 1 + } + | j ->vmeta_equal // Handle __eq metamethod. + } else { + |.if FFI + |3: + | clfi ITYPE, LJ_TCDATA + if (LJ_DUALNUM && vk) { + | jne <9 + } else { + | jne <2 + } + | j ->vmeta_equal_cd + |.endif + } + break; + case BC_ISEQS: case BC_ISNES: + vk = op == BC_ISEQS; + | ins_AND // RA = src, RD = str const, JMP with RD = target + | sllg RA, RA, 3 + | sllg RD, RD, 3 + | lg RB, 0(RA, BASE) + | la PC, 4(PC) + | checkstr RB, >3 + | cg RB, 0(RD, KBASE) + iseqne_test: + if (vk) { + | jne >2 + } else { + | je >1 + } + goto iseqne_end; + case BC_ISEQN: case BC_ISNEN: + vk = op == BC_ISEQN; + | ins_AD // RA = src, RD = num const, JMP with RD = target + | sllg RA, RA, 3 + | sllg RD, RD, 3 + | ld f0, 0(RA, BASE) + | lg RB, 0(RA, BASE) + | ld f1, 0(RD, KBASE) + | lg RD, 0(RD, KBASE) + | la PC, 4(PC) + | checkint RB, >7 + | checkint RD, >8 + | cr RB, RD + if (vk) { + | jne >9 + } else { + | je >9 + } + | llgh RD, PC_RD + | branchPC RD + |9: + | ins_next + | + |7: // RA is not an integer. + | jh >3 + | // RA is a number. + | checkint RD, >1 + | // RA is a number, RD is an integer. + | cdfbr f1, RD + | j >1 + | + |8: // RA is an integer, RD is a number. + | cdfbr f0, RB + | cdbr f0, f1 + | j >4 + |1: + | cdbr f0, f1 + |4: + goto iseqne_fp; + case BC_ISEQP: case BC_ISNEP: + vk = op == BC_ISEQP; + | ins_AND // RA = src, RD = primitive type (~), JMP with RD = target + | sllg RA, RA, 3 + | lg RB, 0(RA, BASE) + | srag RB, RB, 47 + | la PC, 4(PC) + | cr RB, RD + if (!LJ_HASFFI) goto iseqne_test; + if (vk) { + | jne >3 + | llgh RD, PC_RD + | branchPC RD + |2: + | ins_next + |3: + | cghi RB, LJ_TCDATA; jne <2 + | j ->vmeta_equal_cd + } else { + | je >2 + | cghi RB, LJ_TCDATA; je ->vmeta_equal_cd + | llgh RD, PC_RD + | branchPC RD + |2: + | ins_next + } + break; + + /* -- Unary test and copy ops ------------------------------------------- */ + + case BC_ISTC: case BC_ISFC: case BC_IST: case BC_ISF: + | ins_AD // RA = dst or unused, RD = src, JMP with RD = target + | sllg RD, RD, 3 + | sllg RA, RA, 3 + | lg ITYPE, 0(RD, BASE) + | la PC, 4(PC) + if (op == BC_ISTC || op == BC_ISFC) { + | lgr RB, ITYPE + } + | srag ITYPE, ITYPE, 47 + | clfi ITYPE, LJ_TISTRUECOND + if (op == BC_IST || op == BC_ISTC) { + | jhe >1 + } else { + | jl >1 + } + if (op == BC_ISTC || op == BC_ISFC) { + | stg RB, 0(RA, BASE) + } + | llgh RD, PC_RD + | branchPC RD + |1: // Fallthrough to the next instruction. + | ins_next + break; + + case BC_ISTYPE: + | ins_AD // RA = src, RD = -type + | lghr RD, RD + | sllg RA, RA, 3 + | lg RB, 0(RA, BASE) + | srag RB, RB, 47 + | agr RB, RD + | jne ->vmeta_istype + | ins_next + break; + case BC_ISNUM: + | ins_AD // RA = src, RD = -(TISNUM-1) + | sllg TMPR1, RA, 3 + | lg TMPR1, 0(TMPR1, BASE) + | checknumtp TMPR1, ->vmeta_istype + | ins_next + break; + case BC_MOV: + | ins_AD // RA = dst, RD = src + | sllg RD, RD, 3 + | lg RB, 0(RD, BASE) + | sllg RA, RA, 3 + | stg RB, 0(RA, BASE) + | ins_next_ + break; + case BC_NOT: + | ins_AD // RA = dst, RD = src + | sllg RD, RD, 3 + | sllg RA, RA, 3 + | lg RB, 0(RD, BASE) + | srag RB, RB, 47 + | load_false RC + | cghi RB, LJ_TTRUE + | je >1 + | load_true RC + |1: + | stg RC, 0(RA, BASE) + | ins_next + break; + case BC_UNM: + | ins_AD // RA = dst, RD = src + | sllg RA, RA, 3 + | sllg RD, RD, 3 + | lg RB, 0(RD, BASE) + | checkint RB, >3 + | lcr RB, RB; jo >2 + |1: + | stg RB, 0(RA, BASE) + | ins_next + |2: + | llihh RB, 0x41e0 // (double)2^31 + | j <1 + |3: + | jh ->vmeta_unm + | // Toggle sign bit. + | llihh TMPR0, 0x8000 + | xgr RB, TMPR0 + | j <1 + break; + case BC_LEN: + | ins_AD // RA = dst, RD = src + | sllg RD, RD, 3 + | lg RD, 0(RD, BASE) + | checkstr RD, >2 + | llgf RD, STR:RD->len + |1: + | sllg RA, RA, 3 + | setint RD + | stg RD, 0(RA, BASE) + | ins_next + |2: + | cghi ITYPE, LJ_TTAB; jne ->vmeta_len + | lgr TAB:CARG1, TAB:RD +#if LJ_52 + | lg TAB:RB, TAB:RD->metatable + | cghi TAB:RB, 0 + | jne >9 + |3: +#endif + |->BC_LEN_Z: + | brasl r14, extern lj_tab_len // (GCtab *t) + | // Length of table returned in r2 (CRET1). + | lgr RD, CRET1 + | llgc RA, PC_RA + | j <1 +#if LJ_52 + |9: // Check for __len. + | tm TAB:RB->nomm, 1<<MM_len + | jne <3 + | j ->vmeta_len // 'no __len' flag NOT set: check. +#endif + break; + + /* -- Binary ops -------------------------------------------------------- */ + + |.macro ins_arithpre + | ins_ABC + | sllg RB, RB, 3 + | sllg RC, RC, 3 + | sllg RA, RA, 3 + |.endmacro + | + |.macro ins_arithfp, ins + | ins_arithpre + ||vk = ((int)op - BC_ADDVN) / (BC_ADDNV-BC_ADDVN); + ||switch (vk) { + ||case 0: + | ld f0, 0(RB, BASE) + | ld f1, 0(RC, KBASE) + | lg RB, 0(RB, BASE) + | lg RC, 0(RC, KBASE) + | checknumtp RB, ->vmeta_arith_vno + | checknumtp RC, ->vmeta_arith_vno + | ins f0, f1 + || break; + ||case 1: + | ld f1, 0(RB, BASE) + | ld f0, 0(RC, KBASE) + | lg RB, 0(RB, BASE) + | lg RC, 0(RC, KBASE) + | checknumtp RB, ->vmeta_arith_nvo + | checknumtp RC, ->vmeta_arith_nvo + | ins f0, f1 + || break; + ||default: + | ld f0, 0(RB, BASE) + | ld f1, 0(RC, BASE) + | lg RB, 0(RB, BASE) + | lg RC, 0(RC, BASE) + | checknumtp RB, ->vmeta_arith_vvo + | checknumtp RC, ->vmeta_arith_vvo + | ins f0, f1 + || break; + ||} + | std f0, 0(RA, BASE) + | ins_next + |.endmacro + | + |.macro ins_arithdn, intins + | ins_arithpre + ||vk = ((int)op - BC_ADDVN) / (BC_ADDNV-BC_ADDVN); + ||switch (vk) { + ||case 0: + | lg RB, 0(RB, BASE) + | lg RC, 0(RC, KBASE) + | checkint RB, ->vmeta_arith_vno + | checkint RC, ->vmeta_arith_vno + | intins RB, RC; jo ->vmeta_arith_vno + || break; + ||case 1: + | lg RB, 0(RB, BASE) + | lg RC, 0(RC, KBASE) + | checkint RB, ->vmeta_arith_nvo + | checkint RC, ->vmeta_arith_nvo + | intins RC, RB; jo ->vmeta_arith_nvo + || break; + ||default: + | lg RB, 0(RB, BASE) + | lg RC, 0(RC, BASE) + | checkint RB, ->vmeta_arith_vvo + | checkint RC, ->vmeta_arith_vvo + | intins RB, RC; jo ->vmeta_arith_vvo + || break; + ||} + ||if (vk == 1) { + | // setint RC + | stg RC, 0(RA, BASE) + ||} else { + | // setint RB + | stg RB, 0(RA, BASE) + ||} + | ins_next + |.endmacro + + | // RA = dst, RB = src1 or num const, RC = src2 or num const + case BC_ADDVN: case BC_ADDNV: case BC_ADDVV: + | ins_arithdn ar + break; + case BC_SUBVN: case BC_SUBNV: case BC_SUBVV: + | ins_arithdn sr + break; + case BC_MULVN: case BC_MULNV: case BC_MULVV: + | ins_arithpre + | // For multiplication we use msgfr and check if the result + | // fits in an int32_t. + switch(op) { + case BC_MULVN: + | lg RB, 0(RB, BASE) + | lg RC, 0(RC, KBASE) + | checkint RB, ->vmeta_arith_vno + | checkint RC, ->vmeta_arith_vno + | lgfr RB, RB + | msgfr RB, RC + | lgfr RC, RB + | cgr RB, RC; jne ->vmeta_arith_vno + break; + case BC_MULNV: + | lg RB, 0(RB, BASE) + | lg RC, 0(RC, KBASE) + | checkint RB, ->vmeta_arith_nvo + | checkint RC, ->vmeta_arith_nvo + | lgfr RB, RB + | msgfr RB, RC + | lgfr RC, RB + | cgr RB, RC; jne ->vmeta_arith_nvo + break; + default: + | lg RB, 0(RB, BASE) + | lg RC, 0(RC, BASE) + | checkint RB, ->vmeta_arith_vvo + | checkint RC, ->vmeta_arith_vvo + | lgfr RB, RB + | msgfr RB, RC + | lgfr RC, RB + | cgr RB, RC; jne ->vmeta_arith_vvo + break; + } + | llgfr RB, RB + | setint RB + | stg RB, 0(RA, BASE) + | ins_next + break; + case BC_DIVVN: case BC_DIVNV: case BC_DIVVV: + | ins_arithfp ddbr + break; + // TODO: implement fast mod operation. + // x86_64 does floating point mod, however it might be better to use integer mod. + case BC_MODVN: + | j ->vmeta_arith_vno + break; + case BC_MODNV: + | j ->vmeta_arith_nvo + break; + case BC_MODVV: + | j ->vmeta_arith_vvo + break; + case BC_POW: + | ins_ABC + | sllg RB, RB, 3 + | sllg RC, RC, 3 + | ld FARG1, 0(RB, BASE) + | ld FARG2, 0(RC, BASE) + | lg TMPR0, 0(RB, BASE) + | checknumtp TMPR0, ->vmeta_arith_vvo + | lg TMPR0, 0(RC, BASE) + | checknumtp TMPR0, ->vmeta_arith_vvo + | brasl r14, extern pow // double pow(double x, double y), result in f0. + | llgc RA, PC_RA + | sllg RA, RA, 3 + | std f0, 0(RA, BASE) + | ins_next + break; + + case BC_CAT: + | ins_ABC // RA = dst, RB = src_start, RC = src_end + | lg L:CARG1, SAVE_L + | stg BASE, L:CARG1->base + | lgr CARG3, RC + | sgr CARG3, RB + | sllg RC, RC, 3 + | la CARG2, 0(RC, BASE) + |->BC_CAT_Z: + | lgr L:RB, L:CARG1 + | stg PC, SAVE_PC + | brasl r14, extern lj_meta_cat // (lua_State *L, TValue *top, int left) + | // NULL (finished) or TValue * (metamethod) returned in r2 (CRET1). + | lg BASE, L:RB->base + | ltgr RC, CRET1 + | jne ->vmeta_binop + | llgc RB, PC_RB // Copy result to Stk[RA] from Stk[RB]. + | sllg RB, RB, 3 + | llgc RA, PC_RA + | sllg RA, RA, 3 + | lg RC, 0(RB, BASE) + | stg RC, 0(RA, BASE) + | ins_next + break; + + /* -- Constant ops ------------------------------------------------------ */ + + case BC_KSTR: + | ins_AND // RA = dst, RD = str const (~) + | sllg RD, RD, 3 + | lg RD, 0(RD, KBASE) + | settp RD, LJ_TSTR + | sllg RA, RA, 3 + | stg RD, 0(RA, BASE) + | ins_next + break; + case BC_KCDATA: + |.if FFI + | ins_AND // RA = dst, RD = cdata const (~) + | sllg RD, RD, 3 + | sllg RA, RA, 3 + | lg RD, 0(RD, KBASE) + | settp RD, LJ_TCDATA + | stg RD, 0(RA, BASE) + | ins_next + |.endif + break; + case BC_KSHORT: + | ins_AD // RA = dst, RD = signed int16 literal + | // Assumes DUALNUM. + | lhr RD, RD // Sign-extend literal to 32-bits. + | setint RD + | sllg RA, RA, 3 + | stg RD, 0(RA, BASE) + | ins_next + break; + case BC_KNUM: + | ins_AD // RA = dst, RD = num const + | sllg RD, RD, 3 + | ld f0, 0(RD, KBASE) + | sllg RA, RA, 3 + | std f0, 0(RA, BASE) + | ins_next + break; + case BC_KPRI: + | ins_AD // RA = dst, RD = primitive type (~) + | sllg RA, RA, 3 + | sllg RD, RD, 47 + | lghi TMPR0, -1 + | xgr RD, TMPR0 // not + | stg RD, 0(RA, BASE) + | ins_next + break; + case BC_KNIL: + | ins_AD // RA = dst_start, RD = dst_end + | sllg RA, RA, 3 + | sllg RD, RD, 3 + | la RA, 8(RA, BASE) + | la RD, 0(RD, BASE) + | lghi RB, LJ_TNIL + | stg RB, -8(RA) // Sets minimum 2 slots. + |1: + | stg RB, 0(RA) + | la RA, 8(RA) + | clgr RA, RD + | jle <1 + | ins_next + break; + +/* -- Upvalue and function ops ------------------------------------------ */ + + case BC_UGET: + | ins_AD // RA = dst, RD = upvalue # + | sllg RA, RA, 3 + | sllg RD, RD, 3 + | lg LFUNC:RB, -16(BASE) + | cleartp LFUNC:RB + | lg UPVAL:RB, (offsetof(GCfuncL, uvptr))(RD, LFUNC:RB) + | lg RB, UPVAL:RB->v + | lg RD, 0(RB) + | stg RD, 0(RA, BASE) + | ins_next + break; + case BC_USETV: +#define TV2MARKOFS \ + ((int32_t)offsetof(GCupval, marked)-(int32_t)offsetof(GCupval, tv)) + | ins_AD // RA = upvalue #, RD = src + | lg LFUNC:RB, -16(BASE) + | cleartp LFUNC:RB + | sllg RA, RA, 3 + | lg UPVAL:RB, (offsetof(GCfuncL, uvptr))(RA, LFUNC:RB) + | tm UPVAL:RB->closed, 0xff + | lg RB, UPVAL:RB->v + | sllg TMPR1, RD, 3 + | lg RA, 0(TMPR1, BASE) + | stg RA, 0(RB) + | je >1 + | // Check barrier for closed upvalue. + | tmy TV2MARKOFS(RB), LJ_GC_BLACK // isblack(uv) + | jne >2 + |1: + | ins_next + | + |2: // Upvalue is black. Check if new value is collectable and white. + | srag RD, RA, 47 + | ahi RD, -LJ_TISGCV + | clfi RD, LJ_TNUMX - LJ_TISGCV // tvisgcv(v) + | jle <1 + | cleartp GCOBJ:RA + | tm GCOBJ:RA->gch.marked, LJ_GC_WHITES // iswhite(v) + | je <1 + | // Crossed a write barrier. Move the barrier forward. + | lgr CARG2, RB + | lay GL:CARG1, GG_DISP2G(DISPATCH) + | brasl r14, extern lj_gc_barrieruv // (global_State *g, TValue *tv) + | j <1 + break; +#undef TV2MARKOFS + case BC_USETS: + | ins_AND // RA = upvalue #, RD = str const (~) + | lg LFUNC:RB, -16(BASE) + | sllg RA, RA, 3 + | sllg RD, RD, 3 + | cleartp LFUNC:RB + | lg UPVAL:RB, (offsetof(GCfuncL, uvptr))(RA, LFUNC:RB) + | lg STR:RA, 0(RD, KBASE) + | lg RD, UPVAL:RB->v + | settp STR:ITYPE, STR:RA, LJ_TSTR + | stg STR:ITYPE, 0(RD) + | tm UPVAL:RB->marked, LJ_GC_BLACK // isblack(uv) + | jne >2 + |1: + | ins_next + | + |2: // Check if string is white and ensure upvalue is closed. + | tm GCOBJ:RA->gch.marked, LJ_GC_WHITES // iswhite(str) + | je <1 + | tm UPVAL:RB->closed, 0xff + | je <1 + | // Crossed a write barrier. Move the barrier forward. + | lgr CARG2, RD + | lay GL:CARG1, GG_DISP2G(DISPATCH) + | brasl r14, extern lj_gc_barrieruv // (global_State *g, TValue *tv) + | j <1 + break; + case BC_USETN: + | ins_AD // RA = upvalue #, RD = num const + | lg LFUNC:RB, -16(BASE) + | sllg RA, RA, 3 + | sllg RD, RD, 3 + | cleartp LFUNC:RB + | ld f0, 0(RD, KBASE) + | lg UPVAL:RB, (offsetof(GCfuncL, uvptr))(RA, LFUNC:RB) + | lg RA, UPVAL:RB->v + | std f0, 0(RA) + | ins_next + break; + case BC_USETP: + | ins_AD // RA = upvalue #, RD = primitive type (~) + | lg LFUNC:RB, -16(BASE) + | sllg RA, RA, 3 + | cleartp LFUNC:RB + | lg UPVAL:RB, (offsetof(GCfuncL, uvptr))(RA, LFUNC:RB) + | sllg RD, RD, 47 + | lghi TMPR0, -1 + | xgr RD, TMPR0 + | lg RA, UPVAL:RB->v + | stg RD, 0(RA) + | ins_next + break; + case BC_UCLO: + | ins_AD // RA = level, RD = target + | branchPC RD // Do this first to free RD. + | lg L:RB, SAVE_L + | ltg TMPR0, L:RB->openupval + | je >1 + | stg BASE, L:RB->base + | sllg RA, RA, 3 + | la CARG2, 0(RA, BASE) + | lgr L:CARG1, L:RB + | brasl r14, extern lj_func_closeuv // (lua_State *L, TValue *level) + | lg BASE, L:RB->base + |1: + | ins_next + break; + + case BC_FNEW: + | ins_AND // RA = dst, RD = proto const (~) (holding function prototype) + | lg L:RB, SAVE_L + | stg BASE, L:RB->base + | lg CARG3, -16(BASE) + | cleartp CARG3 + | sllg RD, RD, 3 + | lg CARG2, 0(RD, KBASE) // Fetch GCproto *. + | lgr CARG1, L:RB + | stg PC, SAVE_PC + | // (lua_State *L, GCproto *pt, GCfuncL *parent) + | brasl r14, extern lj_func_newL_gc + | // GCfuncL * returned in r2 (CRET1). + | lg BASE, L:RB->base + | llgc RA, PC_RA + | sllg RA, RA, 3 + | settp LFUNC:CRET1, LJ_TFUNC + | stg LFUNC:CRET1, 0(RA, BASE) + | ins_next + break; + case BC_TNEW: + | ins_AD // RA = dst, RD = hbits|asize + | lg L:RB, SAVE_L + | stg BASE, L:RB->base + | lg RA, (DISPATCH_GL(gc.total))(DISPATCH) + | clg RA, (DISPATCH_GL(gc.threshold))(DISPATCH) + | stg PC, SAVE_PC + | jhe >5 + |1: + | srlg CARG3, RD, 11 + | llill TMPR0, 0x7ff + | nr RD, TMPR0 + | cr RD, TMPR0 + | je >3 + |2: + | lgr L:CARG1, L:RB + | llgfr CARG2, RD + | brasl r14, extern lj_tab_new // (lua_State *L, uint32_t asize, uint32_t hbits) + | // Table * returned in r2 (CRET1). + | lg BASE, L:RB->base + | llgc RA, PC_RA + | sllg RA, RA, 3 + | settp TAB:CRET1, LJ_TTAB + | stg TAB:CRET1, 0(RA, BASE) + | ins_next + |3: // Turn 0x7ff into 0x801. + | llill RD, 0x801 + | j <2 + |5: + | lgr L:CARG1, L:RB + | brasl r14, extern lj_gc_step_fixtop // (lua_State *L) + | llgh RD, PC_RD + | j <1 + break; + case BC_TDUP: + | ins_AND // RA = dst, RD = table const (~) (holding template table) + | lg L:RB, SAVE_L + | lg RA, (DISPATCH_GL(gc.total))(DISPATCH) + | stg PC, SAVE_PC + | clg RA, (DISPATCH_GL(gc.threshold))(DISPATCH) + | stg BASE, L:RB->base + | jhe >3 + |2: + | sllg RD, RD, 3 + | lg TAB:CARG2, 0(RD, KBASE) + | lgr L:CARG1, L:RB + | brasl r14, extern lj_tab_dup // (lua_State *L, Table *kt) + | // Table * returned in r2 (CRET1). + | lg BASE, L:RB->base + | llgc RA, PC_RA + | settp TAB:CRET1, LJ_TTAB + | sllg RA, RA, 3 + | stg TAB:CRET1, 0(RA, BASE) + | ins_next + |3: + | lgr L:CARG1, L:RB + | brasl r14, extern lj_gc_step_fixtop // (lua_State *L) + | llgh RD, PC_RD // Need to reload RD. + | lghi TMPR0, -1 + | xgr RD, TMPR0 // not RD + | j <2 + break; + + case BC_GGET: + | ins_AND // RA = dst, RD = str const (~) + | lg LFUNC:RB, -16(BASE) + | cleartp LFUNC:RB + | lg TAB:RB, LFUNC:RB->env + | sllg TMPR1, RD, 3 + | lg STR:RC, 0(TMPR1, KBASE) + | j ->BC_TGETS_Z + break; + case BC_GSET: + | ins_AND // RA = src, RD = str const (~) + | lg LFUNC:RB, -16(BASE) + | cleartp LFUNC:RB + | lg TAB:RB, LFUNC:RB->env + | sllg TMPR1, RD, 3 + | lg STR:RC, 0(TMPR1, KBASE) + | j ->BC_TSETS_Z + break; + + case BC_TGETV: + | ins_ABC // RA = dst, RB = table, RC = key + | sllg RB, RB, 3 + | lg TAB:RB, 0(RB, BASE) + | sllg RC, RC, 3 + | lg RC, 0(RC, BASE) + | checktab TAB:RB, ->vmeta_tgetv + | + | // Integer key? + | checkint RC, >5 + | cl RC, TAB:RB->asize // Takes care of unordered, too. + | jhe ->vmeta_tgetv // Not in array part? Use fallback. + | llgfr RC, RC + | sllg RC, RC, 3 + | ag RC, TAB:RB->array + | // Get array slot. + | lg ITYPE, 0(RC) + | cghi ITYPE, LJ_TNIL // Avoid overwriting RB in fastpath. + | je >2 + |1: + | sllg RA, RA, 3 + | stg ITYPE, 0(RA, BASE) + | ins_next + | + |2: // Check for __index if table value is nil. + | lg TAB:TMPR1, TAB:RB->metatable + | cghi TAB:TMPR1, 0 + | je <1 + | tm TAB:TMPR1->nomm, 1<<MM_index + | je ->vmeta_tgetv // 'no __index' flag NOT set: check. + | j <1 + | + |5: // String key? + | cghi ITYPE, LJ_TSTR; jne ->vmeta_tgetv + | cleartp STR:RC + | j ->BC_TGETS_Z + break; + case BC_TGETS: + | ins_ABC + | sllg RB, RB, 3 + | lg TAB:RB, 0(RB, BASE) + | lghi TMPR1, -1 + | xgr RC, TMPR1 + | sllg RC, RC, 3 + | lg STR:RC, 0(RC, KBASE) + | checktab TAB:RB, ->vmeta_tgets + |->BC_TGETS_Z: // RB = GCtab *, RC = GCstr * + | l TMPR1, TAB:RB->hmask + | n TMPR1, STR:RC->hash + | lgfr TMPR1, TMPR1 + | mghi TMPR1, #NODE + | ag NODE:TMPR1, TAB:RB->node + | settp ITYPE, STR:RC, LJ_TSTR + |1: + | cg ITYPE, NODE:TMPR1->key + | jne >4 + | // Get node value. + | lg ITYPE, NODE:TMPR1->val + | cghi ITYPE, LJ_TNIL + | je >5 // Key found, but nil value? + |2: + | sllg RA, RA, 3 + | stg ITYPE, 0(RA, BASE) + | ins_next + | + |4: // Follow hash chain. + | lg NODE:TMPR1, NODE:TMPR1->next + | cghi NODE:TMPR1, 0 + | jne <1 + | // End of hash chain: key not found, nil result. + | lghi ITYPE, LJ_TNIL + | + |5: // Check for __index if table value is nil. + | lg TAB:TMPR1, TAB:RB->metatable + | cghi TAB:TMPR1, 0 + | je <2 // No metatable: done. + | tm TAB:TMPR1->nomm, 1<<MM_index + | jne <2 // 'no __index' flag set: done. + | j ->vmeta_tgets // Caveat: preserve STR:RC. + break; + case BC_TGETB: + | ins_ABC // RA = dst, RB = table, RC = byte literal + | sllg RB, RB, 3 + | lg TAB:RB, 0(RB, BASE) + | checktab TAB:RB, ->vmeta_tgetb + | cl RC, TAB:RB->asize + | jhe ->vmeta_tgetb + | sllg RC, RC, 3 + | ag RC, TAB:RB->array + | // Get array slot. + | lg ITYPE, 0(RC) + | cghi ITYPE, LJ_TNIL + | je >2 + |1: + | sllg RA, RA, 3 + | stg ITYPE, 0(RA, BASE) + | ins_next + | + |2: // Check for __index if table value is nil. + | lg TAB:TMPR1, TAB:RB->metatable + | cghi TAB:TMPR1, 0 + | je <1 + | tm TAB:TMPR1->nomm, 1<<MM_index + | je ->vmeta_tgetb // 'no __index' flag NOT set: check. + | j <1 + break; + case BC_TGETR: + | ins_ABC // RA = dst, RB = table, RC = key + | sllg RB, RB, 3 + | lg TAB:RB, 0(RB, BASE) + | cleartp TAB:RB + | sllg RC, RC, 3 + | llgf RC, 4(RC, BASE) // Load low word (big endian). + | cl RC, TAB:RB->asize + | jhe ->vmeta_tgetr // Not in array part? Use fallback. + | sllg RC, RC, 3 + | ag RC, TAB:RB->array + | // Get array slot. + |->BC_TGETR_Z: + | lg ITYPE, 0(RC) + |->BC_TGETR2_Z: + | sllg RA, RA, 3 + | stg ITYPE, 0(RA, BASE) + | ins_next + break; + + case BC_TSETV: + | ins_ABC // RA = src, RB = table, RC = key + | sllg RB, RB, 3 + | lg TAB:RB, 0(RB, BASE) + | sllg RC, RC, 3 + | lg RC, 0(RC, BASE) + | checktab TAB:RB, ->vmeta_tsetv + | + | // Integer key? + | checkint RC, >5 + | cl RC, TAB:RB->asize // Takes care of unordered, too. + | jhe ->vmeta_tsetv + | llgfr RC, RC + | sllg RC, RC, 3 + | ag RC, TAB:RB->array + | lghi TMPR0, LJ_TNIL + | cg TMPR0, 0(RC) + | je >3 // Previous value is nil? + |1: + | tm TAB:RB->marked, LJ_GC_BLACK // isblack(table) + | jne >7 + |2: // Set array slot. + | sllg RA, RA, 3 + | lg RB, 0(RA, BASE) + | stg RB, 0(RC) + | ins_next + | + |3: // Check for __newindex if previous value is nil. + | lg TAB:TMPR1, TAB:RB->metatable + | cghi TAB:TMPR1, 0 + | je <1 + | tm TAB:TMPR1->nomm, 1<<MM_newindex + | je ->vmeta_tsetv // 'no __newindex' flag NOT set: check. + | j <1 + | + |5: // String key? + | cghi ITYPE, LJ_TSTR; jne ->vmeta_tsetv + | cleartp STR:RC + | j ->BC_TSETS_Z + | + |7: // Possible table write barrier for the value. Skip valiswhite check. + | barrierback TAB:RB, TMPR1 + | j <2 + break; + case BC_TSETS: + | ins_ABC // RA = src, RB = table, RC = str const (~) + | sllg RB, RB, 3 + | lg TAB:RB, 0(RB, BASE) + | lghi TMPR0, -1 + | xgr RC, TMPR0 // ~RC + | sllg RC, RC, 3 + | lg STR:RC, 0(RC, KBASE) + | checktab TAB:RB, ->vmeta_tsets + |->BC_TSETS_Z: // RB = GCtab *, RC = GCstr * + | l TMPR1, TAB:RB->hmask + | n TMPR1, STR:RC->hash + | lgfr TMPR1, TMPR1 + | mghi TMPR1, #NODE + | mvi TAB:RB->nomm, 0 // Clear metamethod cache. + | ag NODE:TMPR1, TAB:RB->node + | settp ITYPE, STR:RC, LJ_TSTR + |1: + | cg ITYPE, NODE:TMPR1->key + | jne >5 + | // Ok, key found. Assumes: offsetof(Node, val) == 0 + | lghi TMPR0, LJ_TNIL + | cg TMPR0, 0(TMPR1) + | je >4 // Previous value is nil? + |2: + | tm TAB:RB->marked, LJ_GC_BLACK // isblack(table) + | jne >7 + |3: // Set node value. + | sllg RA, RA, 3 + | lg ITYPE, 0(RA, BASE) + | stg ITYPE, 0(TMPR1) + | ins_next + | + |4: // Check for __newindex if previous value is nil. + | lg TAB:ITYPE, TAB:RB->metatable + | cghi TAB:ITYPE, 0 + | je <2 + | tm TAB:ITYPE->nomm, 1<<MM_newindex + | je ->vmeta_tsets // 'no __newindex' flag NOT set: check. + | j <2 + | + |5: // Follow hash chain. + | lg NODE:TMPR1, NODE:TMPR1->next + | cghi NODE:TMPR1, 0 + | jne <1 + | // End of hash chain: key not found, add a new one. + | + | // But check for __newindex first. + | lg TAB:TMPR1, TAB:RB->metatable + | cghi TAB:TMPR1, 0 + | je >6 // No metatable: continue. + | tm TAB:TMPR1->nomm, 1<<MM_newindex + | je ->vmeta_tsets // 'no __newindex' flag NOT set: check. + |6: + | stg ITYPE, SAVE_TMP + | lg L:CARG1, SAVE_L + | stg BASE, L:CARG1->base + | la CARG3, SAVE_TMP + | lgr CARG2, TAB:RB + | stg PC, SAVE_PC + | brasl r14, extern lj_tab_newkey // (lua_State *L, GCtab *t, TValue *k) + | // Handles write barrier for the new key. TValue * returned in r2 (CRET1). + | lgr TMPR1, CRET1 + | lg L:CRET1, SAVE_L + | lg BASE, L:CRET1->base + | llgc RA, PC_RA + | j <2 // Must check write barrier for value. + | + |7: // Possible table write barrier for the value. Skip valiswhite check. + | barrierback TAB:RB, ITYPE + | j <3 + break; + case BC_TSETB: + | ins_ABC // RA = src, RB = table, RC = byte literal + | sllg RB, RB, 3 + | lg TAB:RB, 0(RB, BASE) + | checktab TAB:RB, ->vmeta_tsetb + | cl RC, TAB:RB->asize + | jhe ->vmeta_tsetb + | sllg RC, RC, 3 + | ag RC, TAB:RB->array + | lghi TMPR0, LJ_TNIL + | cg TMPR0, 0(RC) + | je >3 // Previous value is nil? + |1: + | tm TAB:RB->marked, LJ_GC_BLACK // isblack(table) + | jne >7 + |2: // Set array slot. + | sllg RA, RA, 3 + | lg ITYPE, 0(RA, BASE) + | stg ITYPE, 0(RC) + | ins_next + | + |3: // Check for __newindex if previous value is nil. + | lg TAB:TMPR1, TAB:RB->metatable + | cghi TAB:TMPR1, 0 + | je <1 + | tm TAB:TMPR1->nomm, 1<<MM_newindex + | je ->vmeta_tsetb // 'no __newindex' flag NOT set: check. + | j <1 + | + |7: // Possible table write barrier for the value. Skip valiswhite check. + | barrierback TAB:RB, TMPR1 + | j <2 + break; + case BC_TSETR: + | ins_ABC // RA = src, RB = table, RC = key + | sllg RB, RB, 3 + | lg TAB:RB, 0(RB, BASE) + | cleartp TAB:RB + | sllg RC, RC, 3 + | lg RC, 0(RC, BASE) + | tm TAB:RB->marked, LJ_GC_BLACK // isblack(table) + | jne >7 + |2: + | cl RC, TAB:RB->asize + | jhe ->vmeta_tsetr + | llgfr RC, RC + | sllg RC, RC, 3 + | ag RC, TAB:RB->array + | // Set array slot. + |->BC_TSETR_Z: + | sllg RA, RA, 3 + | lg ITYPE, 0(RA, BASE) + | stg ITYPE, 0(RC) + | ins_next + | + |7: // Possible table write barrier for the value. Skip valiswhite check. + | barrierback TAB:RB, TMPR1 + | j <2 + break; + + case BC_TSETM: + | ins_AD // RA = base (table at base-1), RD = num const (start index) + |1: + | sllg RA, RA, 3 + | sllg TMPR1, RD, 3 + | llgf TMPR1, 4(TMPR1, KBASE) // Integer constant is in lo-word. + | la RA, 0(RA, BASE) + | lg TAB:RB, -8(RA) // Guaranteed to be a table. + | cleartp TAB:RB + | tm TAB:RB->marked, LJ_GC_BLACK // isblack(table) + | jne >7 + |2: + | llgf RD, SAVE_MULTRES + | aghi RD, -1 + | je >4 // Nothing to copy? + | agr RD, TMPR1 // Compute needed size. + | clgf RD, TAB:RB->asize + | jh >5 // Doesn't fit into array part? + | sgr RD, TMPR1 + | sllg TMPR1, TMPR1, 3 + | ag TMPR1, TAB:RB->array + |3: // Copy result slots to table. + | lg RB, 0(RA) + | la RA, 8(RA) + | stg RB, 0(TMPR1) + | la TMPR1, 8(TMPR1) + | brctg RD, <3 + |4: + | ins_next + | + |5: // Need to resize array part. + | lg L:CARG1, SAVE_L + | stg BASE, L:CARG1->base + | lgr CARG2, TAB:RB + | lgfr CARG3, RD + | lgr L:RB, L:CARG1 + | stg PC, SAVE_PC + | brasl r14, extern lj_tab_reasize // (lua_State *L, GCtab *t, int nasize) + | lg BASE, L:RB->base + | llgc RA, PC_RA // Restore RA. + | llgh RD, PC_RD // Restore RD. + | j <1 // Retry. + | + |7: // Possible table write barrier for any value. Skip valiswhite check. + | barrierback TAB:RB, RD + | j <2 + break; + + /* -- Calls and vararg handling ----------------------------------------- */ + + case BC_CALL: case BC_CALLM: + | ins_A_C // RA = base, (RB = nresults+1,) RC = nargs+1 | extra_nargs + | sllg RA, RA, 3 + | lgr RD, RC + if (op == BC_CALLM) { + | agf NARGS:RD, SAVE_MULTRES + } + | lg LFUNC:RB, 0(RA, BASE) + | checkfunc LFUNC:RB, ->vmeta_call_ra + | la BASE, 16(RA, BASE) + | ins_call + break; + + case BC_CALLMT: + | ins_AD // RA = base, RD = extra_nargs + | a NARGS:RD, SAVE_MULTRES + | // Fall through. Assumes BC_CALLT follows and ins_AD is a no-op. + break; + case BC_CALLT: + | ins_AD // RA = base, RD = nargs+1 + | sllg RA, RA, 3 + | la RA, 16(RA, BASE) + | lgr KBASE, BASE // Use KBASE for move + vmeta_call hint. + | lg LFUNC:RB, -16(RA) + | checktp_nc LFUNC:RB, LJ_TFUNC, ->vmeta_call + |->BC_CALLT_Z: + | lg PC, -8(BASE) + | tmll PC, FRAME_TYPE + | jne >7 + |1: + | stg LFUNC:RB, -16(BASE) // Copy func+tag down, reloaded below. + | st NARGS:RD, SAVE_MULTRES + | aghi NARGS:RD, -1 + | je >3 + |2: // Move args down. + | lg RB, 0(RA) + | la RA, 8(RA) + | stg RB, 0(KBASE) + | la KBASE, 8(KBASE) + | brctg NARGS:RD, <2 + | + | lg LFUNC:RB, -16(BASE) + |3: + | cleartp LFUNC:RB + | llgf NARGS:RD, SAVE_MULTRES + | llgc TMPR1, LFUNC:RB->ffid + | cghi TMPR1, 1 // (> FF_C) Calling a fast function? + | jh >5 + |4: + | ins_callt + | + |5: // Tailcall to a fast function. + | tmll PC, FRAME_TYPE // Lua frame below? + | jne <4 + | llgc RA, PC_RA + | lcgr RA, RA + | sllg RA, RA, 3 + | lg LFUNC:KBASE, -32(RA, BASE) // Need to prepare KBASE. + | cleartp LFUNC:KBASE + | lg KBASE, LFUNC:KBASE->pc + | lg KBASE, (PC2PROTO(k))(KBASE) + | j <4 + | + |7: // Tailcall from a vararg function. + | aghi PC, -FRAME_VARG + | tmll PC, FRAME_TYPEP + | jne >8 // Vararg frame below? + | sgr BASE, PC // Need to relocate BASE/KBASE down. + | lgr KBASE, BASE + | lg PC, -8(BASE) + | j <1 + |8: + | aghi PC, FRAME_VARG + | j <1 + break; + + case BC_ITERC: + | ins_A // RA = base, (RB = nresults+1,) RC = nargs+1 (2+1) + | sllg RA, RA, 3 + | la RA, 16(RA, BASE) // fb = base+2 + | lg RB, -32(RA) // Copy state. fb[0] = fb[-4]. + | lg RC, -24(RA) // Copy control var. fb[1] = fb[-3]. + | stg RB, 0(RA) + | stg RC, 8(RA) + | lg LFUNC:RB, -40(RA) // Copy callable. fb[-2] = fb[-5] + | stg LFUNC:RB, -16(RA) + | lghi NARGS:RD, 2+1 // Handle like a regular 2-arg call. + | checkfunc LFUNC:RB, ->vmeta_call + | lgr BASE, RA + | ins_call + break; + + case BC_ITERN: + | ins_A // RA = base, (RB = nresults+1, RC = nargs+1 (2+1)) + |.if JIT + | // NYI: add hotloop, record BC_ITERN. + |.endif + | sllg RA, RA, 3 + | lg TAB:RB, -16(RA, BASE) + | cleartp TAB:RB + | llgf RC, -4(RA, BASE) // Get index from control var. + | llgf TMPR1, TAB:RB->asize + | la PC, 4(PC) + | lg ITYPE, TAB:RB->array + |1: // Traverse array part. + | clr RC, TMPR1; jhe >5 // Index points after array part? + | sllg RD, RC, 3 // Warning: won't work if RD==RC! + | lg TMPR0, 0(RD, ITYPE) + | cghi TMPR0, LJ_TNIL; je >4 + | // Copy array slot to returned value. + | lgr RB, TMPR0 + | stg RB, 8(RA, BASE) + | // Return array index as a numeric key. + | setint ITYPE, RC + | stg ITYPE, 0(RA, BASE) + | ahi RC, 1 + | sty RC, -4(RA, BASE) // Update control var. + |2: + | llgh RD, PC_RD // Get target from ITERL. + | branchPC RD + |3: + | ins_next + | + |4: // Skip holes in array part. + | ahi RC, 1 + | j <1 + | + |5: // Traverse hash part. + | sr RC, TMPR1 + |6: + | cl RC, TAB:RB->hmask; jh <3 // End of iteration? Branch to ITERL+1. + | llgfr ITYPE, RC + | mghi ITYPE, #NODE + | ag NODE:ITYPE, TAB:RB->node + | lghi TMPR0, LJ_TNIL + | cg TMPR0, NODE:ITYPE->val; je >7 + | ar TMPR1, RC + | ahi TMPR1, 1 + | // Copy key and value from hash slot. + | lg RB, NODE:ITYPE->key + | lg RC, NODE:ITYPE->val + | stg RB, 0(RA, BASE) + | stg RC, 8(RA, BASE) + | sty TMPR1, -4(RA, BASE) + | j <2 + | + |7: // Skip holes in hash part. + | ahi RC, 1 + | j <6 + break; + + case BC_ISNEXT: + | ins_AD // RA = base, RD = target (points to ITERN) + | sllg RA, RA, 3 + | lg CFUNC:RB, -24(RA, BASE) + | checkfunc CFUNC:RB, >5 + | lg TMPR1, -16(RA, BASE) + | checktptp TMPR1, LJ_TTAB, >5 + | lghi TMPR0, LJ_TNIL + | cg TMPR0, -8(RA, BASE); jne >5 + | llgc TMPR1, CFUNC:RB->ffid + | clfi TMPR1, (uint8_t)FF_next_N; jne >5 + | branchPC RD + | llihl TMPR1, 0x7fff + | iihh TMPR1, 0xfffe + | stg TMPR1, -8(RA, BASE) // Initialize control var. + |1: + | ins_next + |5: // Despecialize bytecode if any of the checks fail. + | lghi TMPR0, BC_JMP + | stcy TMPR0, PC_OP + | branchPC RD + | mvi 3(PC), BC_ITERC + | j <1 + break; + + case BC_VARG: + | ins_ABC // RA = base, RB = nresults+1, RC = numparams + | sllg RA, RA, 3 + | sllg RB, RB, 3 + | sllg RC, RC, 3 + | la TMPR1, (16+FRAME_VARG)(RC, BASE) + | la RA, 0(RA, BASE) + | sg TMPR1, -8(BASE) + | // Note: TMPR1 may now be even _above_ BASE if nargs was < numparams. + | cghi RB, 0 + | je >5 // Copy all varargs? + | lay RB, -8(RA, RB) + | clgr TMPR1, BASE // No vararg slots? + | lghi TMPR0, LJ_TNIL + | jnl >2 + |1: // Copy vararg slots to destination slots. + | lg RC, -16(TMPR1) + | la TMPR1, 8(TMPR1) + | stg RC, 0(RA) + | la RA, 8(RA) + | clgr RA, RB // All destination slots filled? + | jnl >3 + | clgr TMPR1, BASE // No more vararg slots? + | jl <1 + |2: // Fill up remainder with nil. + | stg TMPR0, 0(RA) + | la RA, 8(RA) + | clgr RA, RB + | jl <2 + |3: + | ins_next + | + |5: // Copy all varargs. + | lghi TMPR0, 1 + | st TMPR0, SAVE_MULTRES // MULTRES = 0+1 + | lgr RC, BASE + | slgr RC, TMPR1 + | jno <3 // No vararg slots? (borrow or zero) + | llgfr RB, RC + | srlg RB, RB, 3 + | ahi RB, 1 + | st RB, SAVE_MULTRES // MULTRES = #varargs+1 + | lg L:RB, SAVE_L + | agr RC, RA + | clg RC, L:RB->maxstack + | jh >7 // Need to grow stack? + |6: // Copy all vararg slots. + | lg RC, -16(TMPR1) + | la TMPR1, 8(TMPR1) + | stg RC, 0(RA) + | la RA, 8(RA) + | clgr TMPR1, BASE // No more vararg slots? + | jl <6 + | j <3 + | + |7: // Grow stack for varargs. + | stg BASE, L:RB->base + | stg RA, L:RB->top + | stg PC, SAVE_PC + | sgr TMPR1, BASE // Need delta, because BASE may change. + | st TMPR1, SAVE_TMP_HI + | llgf CARG2, SAVE_MULTRES + | aghi CARG2, -1 + | lgr CARG1, L:RB + | brasl r14, extern lj_state_growstack // (lua_State *L, int n) + | lg BASE, L:RB->base + | lgf TMPR1, SAVE_TMP_HI + | lg RA, L:RB->top + | agr TMPR1, BASE + | j <6 + break; + + /* -- Returns ----------------------------------------------------------- */ + + case BC_RETM: + | ins_AD // RA = results, RD = extra_nresults + | agf RD, SAVE_MULTRES // MULTRES >=1, so RD >=1. + | // Fall through. Assumes BC_RET follows and ins_AD is a no-op. + break; + + case BC_RET: case BC_RET0: case BC_RET1: + | ins_AD // RA = results, RD = nresults+1 + if (op != BC_RET0) { + | sllg RA, RA, 3 + } + |1: + | lg PC, -8(BASE) + | st RD, SAVE_MULTRES // Save nresults+1. + | tmll PC, FRAME_TYPE // Check frame type marker. + | jne >7 // Not returning to a fixarg Lua func? + switch (op) { + case BC_RET: + |->BC_RET_Z: + | lgr KBASE, BASE // Use KBASE for result move. + | aghi RD, -1 + | je >3 + |2: // Move results down. + | lg RB, 0(KBASE, RA) + | stg RB, -16(KBASE) + | la KBASE, 8(KBASE) + | brctg RD, <2 + |3: + | llgf RD, SAVE_MULTRES // Note: MULTRES may be >256. + | llgc RB, PC_RB + |5: + | cgr RB, RD // More results expected? + | jh >6 + break; + case BC_RET1: + | lg RB, 0(BASE, RA) + | stg RB, -16(BASE) + /* fallthrough */ + case BC_RET0: + |5: + | llgc TMPR1, PC_RB + | cgr TMPR1, RD + | jh >6 + default: + break; + } + | llgc RA, PC_RA + | lcgr RA, RA + | sllg RA, RA, 3 + | lay BASE, -16(RA, BASE) // base = base - (RA+2)*8 + | lg LFUNC:KBASE, -16(BASE) + | cleartp LFUNC:KBASE + | lg KBASE, LFUNC:KBASE->pc + | lg KBASE, PC2PROTO(k)(KBASE) + | ins_next + | + |6: // Fill up results with nil. + | lghi TMPR1, LJ_TNIL + if (op == BC_RET) { + | stg TMPR1, -16(KBASE) // Note: relies on shifted base. + | la KBASE, 8(KBASE) + } else { + | sllg RC, RD, 3 // RC used as temp. + | stg TMPR1, -24(RC, BASE) + } + | la RD, 1(RD) + | j <5 + | + |7: // Non-standard return case. + | lay RB, -FRAME_VARG(PC) + | tmll RB, FRAME_TYPEP + | jne ->vm_return + | // Return from vararg function: relocate BASE down and RA up. + | sgr BASE, RB + if (op != BC_RET0) { + | agr RA, RB + } + | j <1 + break; + + /* -- Loops and branches ------------------------------------------------ */ + + |.define FOR_IDX, 0(RA) + |.define FOR_STOP, 8(RA) + |.define FOR_STEP, 16(RA) + |.define FOR_EXT, 24(RA) + + case BC_FORL: + |.if JIT + | hotloop RB + |.endif + | // Fall through. Assumes BC_IFORL follows and ins_AJ is a no-op. + break; + + case BC_JFORI: + case BC_JFORL: +#if !LJ_HASJIT + break; +#endif + case BC_FORI: + case BC_IFORL: + vk = (op == BC_IFORL || op == BC_JFORL); + | ins_AJ // RA = base, RD = target (after end of loop or start of loop) + | sllg RA, RA, 3 + | la RA, 0(RA, BASE) + | lg RB, FOR_IDX + | checkint RB, >9 + | lg TMPR1, FOR_STOP + if (!vk) { + | checkint TMPR1, ->vmeta_for + | lg ITYPE, FOR_STEP + | chi ITYPE, 0; jl >5 + | srag ITYPE, ITYPE, 47 + | cghi ITYPE, LJ_TISNUM; jne ->vmeta_for + } else { +#ifdef LUA_USE_ASSERT + | // lg TMPR1, FOR_STOP + | checkinttp TMPR1, ->assert_bad_for_arg_type + | lg TMPR0, FOR_STEP + | checkinttp TMPR0, ->assert_bad_for_arg_type +#endif + | lg ITYPE, FOR_STEP + | chi ITYPE, 0; jl >5 + | ar RB, ITYPE; jo >1 + | setint RB + | stg RB, FOR_IDX + } + | cr RB, TMPR1 + | stg RB, FOR_EXT + if (op == BC_FORI) { + | jle >7 + |1: + |6: + | branchPC RD + } else if (op == BC_JFORI) { + | branchPC RD + | llgh RD, PC_RD + | jle =>BC_JLOOP + |1: + |6: + } else if (op == BC_IFORL) { + | jh >7 + |6: + | branchPC RD + |1: + } else { + | jle =>BC_JLOOP + |1: + |6: + } + |7: + | ins_next + | + |5: // Invert check for negative step. + if (!vk) { + | srag ITYPE, ITYPE, 47 + | cghi ITYPE, LJ_TISNUM; jne ->vmeta_for + } else { + | ar RB, ITYPE; jo <1 + | setint RB + | stg RB, FOR_IDX + } + | cr RB, TMPR1 + | stg RB, FOR_EXT + if (op == BC_FORI) { + | jhe <7 + } else if (op == BC_JFORI) { + | branchPC RD + | llgh RD, PC_RD + | jhe =>BC_JLOOP + } else if (op == BC_IFORL) { + | jl <7 + } else { + | jhe =>BC_JLOOP + } + | j <6 + |9: // Fallback to FP variant. + if (!vk) { + | jhe ->vmeta_for + } + if (!vk) { + | lg TMPR0, FOR_STOP + | checknumtp TMPR0, ->vmeta_for + } else { +#ifdef LUA_USE_ASSERT + | lg TMPR0, FOR_STOP + | checknumtp TMPR0, ->assert_bad_for_arg_type + | lg TMPR0, FOR_STEP + | checknumtp TMPR0, ->assert_bad_for_arg_type +#endif + } + | lg RB, FOR_STEP + if (!vk) { + | checknum RB, ->vmeta_for + } + | ld f0, FOR_IDX + | ld f1, FOR_STOP + if (vk) { + | adb f0, FOR_STEP + | std f0, FOR_IDX + } + | cghi RB, 0; jl >3 + | cdbr f1, f0 + |1: + | std f0, FOR_EXT + if (op == BC_FORI) { + | jnl <7 + } else if (op == BC_JFORI) { + | branchPC RD + | llgh RD, PC_RD + | jnl =>BC_JLOOP + } else if (op == BC_IFORL) { + | jl <7 + } else { + | jnl =>BC_JLOOP + } + | j <6 + | + |3: // Invert comparison if step is negative. + | cdbr f0, f1 + | j <1 + break; + + case BC_ITERL: + |.if JIT + | hotloop RB + |.endif + | // Fall through. Assumes BC_IITERL follows and ins_AJ is a no-op. + break; + + case BC_JITERL: +#if !LJ_HASJIT + break; +#endif + case BC_IITERL: + | ins_AJ // RA = base, RD = target + | sllg RA, RA, 3 + | la RA, 0(RA, BASE) + | lg RB, 0(RA) + | cghi RB, LJ_TNIL; je >1 // Stop if iterator returned nil. + if (op == BC_JITERL) { + | stg RB, -8(RA) + | j =>BC_JLOOP + } else { + | branchPC RD // Otherwise save control var + branch. + | stg RB, -8(RA) + } + |1: + | ins_next + break; + + case BC_LOOP: + | ins_A // RA = base, RD = target (loop extent) + | // Note: RA/RD is only used by trace recorder to determine scope/extent + | // This opcode does NOT jump, it's only purpose is to detect a hot loop. + |.if JIT + | hotloop RBd + |.endif + | // Fall through. Assumes BC_ILOOP follows and ins_A is a no-op. + break; + + case BC_ILOOP: + | ins_A // RA = base, RD = target (loop extent) + | ins_next + break; + + case BC_JLOOP: + | stg r0, 0 + | stg r0, 0 + break; + + case BC_JMP: + | ins_AJ // RA = unused, RD = target + | branchPC RD + | ins_next + break; + + /* -- Function headers -------------------------------------------------- */ + + /* + ** Reminder: A function may be called with func/args above L->maxstack, + ** i.e. occupying EXTRA_STACK slots. And vmeta_call may add one extra slot, + ** too. This means all FUNC* ops (including fast functions) must check + ** for stack overflow _before_ adding more slots! + */ + + case BC_FUNCF: + |.if JIT + | stg r0, 0 + |.endif + case BC_FUNCV: /* NYI: compiled vararg functions. */ + | // Fall through. Assumes BC_IFUNCF/BC_IFUNCV follow and ins_AD is a no-op. + break; + + case BC_JFUNCF: +#if !LJ_HASJIT + break; +#endif + case BC_IFUNCF: + | ins_AD // BASE = new base, RA = framesize, RD = nargs+1 + | lg KBASE, (PC2PROTO(k)-4)(PC) + | lg L:RB, SAVE_L + | sllg RA, RA, 3 + | la RA, 0(RA, BASE) // Top of frame. + | clg RA, L:RB->maxstack + | jh ->vm_growstack_f + | llgc RA, (PC2PROTO(numparams)-4)(PC) + | clgr NARGS:RD, RA // Check for missing parameters. + | jle >3 + |2: + if (op == BC_JFUNCF) { + | llgh RD, PC_RD + | j =>BC_JLOOP + } else { + | ins_next + } + | + |3: // Clear missing parameters. + | sllg TMPR1, NARGS:RD, 3 + | lghi TMPR0, LJ_TNIL + |4: + | stg TMPR0, -8(TMPR1, BASE) + | la TMPR1, 8(TMPR1) + | la RD, 1(RD) + | clgr RD, RA + | jle <4 + | j <2 + break; + + case BC_JFUNCV: +#if !LJ_HASJIT + break; +#endif + | stg r0, 0 // NYI: compiled vararg functions + break; /* NYI: compiled vararg functions. */ + + case BC_IFUNCV: + | ins_AD // BASE = new base, RA = framesize, RD = nargs+1 + | sllg TMPR1, NARGS:RD, 3 + | la RB, (FRAME_VARG+8)(TMPR1) + | la RD, 8(TMPR1, BASE) + | lg LFUNC:KBASE, -16(BASE) + | stg RB, -8(RD) // Store delta + FRAME_VARG. + | stg LFUNC:KBASE, -16(RD) // Store copy of LFUNC. + | lg L:RB, SAVE_L + | sllg RA, RA, 3 + | la RA, 0(RA, RD) + | cg RA, L:RB->maxstack + | jh ->vm_growstack_v // Need to grow stack. + | lgr RA, BASE + | lgr BASE, RD + | llgc RB, (PC2PROTO(numparams)-4)(PC) + | cghi RB, 0 + | je >2 + | aghi RA, 8 + | lghi TMPR1, LJ_TNIL + |1: // Copy fixarg slots up to new frame. + | la RA, 8(RA) + | cgr RA, BASE + | jnl >3 // Less args than parameters? + | lg KBASE, -16(RA) + | stg KBASE, 0(RD) + | la RD, 8(RD) + | stg TMPR1, -16(RA) // Clear old fixarg slot (help the GC). + | brctg RB, <1 + |2: + if (op == BC_JFUNCV) { + | llgh RD, PC_RD + | j =>BC_JLOOP + } else { + | lg KBASE, (PC2PROTO(k)-4)(PC) + | ins_next + } + | + |3: // Clear missing parameters. + | stg TMPR1, 0(RD) // TMPR1=LJ_TNIL (-1) here. + | la RD, 8(RD) + | brctg RB, <3 + | j <2 + break; + + case BC_FUNCC: + case BC_FUNCCW: + | ins_AD // BASE = new base, RD = nargs+1 + | lg CFUNC:RB, -16(BASE) + | cleartp CFUNC:RB + | lg KBASE, CFUNC:RB->f + | lg L:RB, SAVE_L + | sllg RD, NARGS:RD, 3 + | lay RD, -8(RD,BASE) + | stg BASE, L:RB->base + | la RA, (8*LUA_MINSTACK)(RD) + | clg RA, L:RB->maxstack + | stg RD, L:RB->top + | lgr CARG1, L:RB + if (op != BC_FUNCC) { + | lgr CARG2, KBASE + } + | jh ->vm_growstack_c // Need to grow stack. + | set_vmstate C + if (op == BC_FUNCC) { + | basr r14, KBASE // (lua_State *L) + } else { + | // (lua_State *L, lua_CFunction f) + | lg TMPR1, (DISPATCH_GL(wrapf))(DISPATCH) + | basr r14, TMPR1 + } + | // nresults returned in r2 (CRET1). + | lgr RD, CRET1 + | lg BASE, L:RB->base + | stg L:RB, (DISPATCH_GL(cur_L))(DISPATCH) + | set_vmstate INTERP + | sllg TMPR1, RD, 3 + | la RA, 0(TMPR1, BASE) + | lcgr RA, RA + | ag RA, L:RB->top // RA = (L->top-(L->base+nresults))*8 + | lg PC, -8(BASE) // Fetch PC of caller. + | j ->vm_returnc + break; + + /* ---------------------------------------------------------------------- */ + + default: + fprintf(stderr, "Error: undefined opcode BC_%s\n", bc_names[op]); + exit(2); + break; + } +} + +static int build_backend(BuildCtx *ctx) +{ + int op; + dasm_growpc(Dst, BC__MAX); + build_subroutines(ctx); + |.code_op + for (op = 0; op < BC__MAX; op++) + build_ins(ctx, (BCOp)op, op); + return BC__MAX; +} + +/* Emit pseudo frame-info for all assembler functions. */ +static void emit_asm_debug(BuildCtx *ctx) +{ + int fcofs = (int)((uint8_t *)ctx->glob[GLOB_vm_ffi_call] - ctx->code); + switch (ctx->mode) { + case BUILD_elfasm: + fprintf(ctx->fp, "\t.section .debug_frame,\"\",@progbits\n"); + fprintf(ctx->fp, + ".Lframe0:\n" + "\t.long .LECIE0-.LSCIE0\n" + ".LSCIE0:\n" + "\t.long 0xffffffff\n" + "\t.byte 0x1\n" + "\t.string \"\"\n" + "\t.uleb128 1\n" + "\t.sleb128 -8\n" + "\t.byte 0xe\n" + "\t.byte 0xc\n\t.uleb128 0xf\n\t.uleb128 160\n" + "\t.align 8\n" + ".LECIE0:\n\n"); + fprintf(ctx->fp, + ".LSFDE0:\n" + "\t.long .LEFDE0-.LASFDE0\n" + ".LASFDE0:\n" + "\t.long .Lframe0\n" + "\t.quad .Lbegin\n" + "\t.quad %d\n" + "\t.byte 0xe\n\t.uleb128 %d\n" /* def_cfa_offset */ + "\t.byte 0x86\n\t.uleb128 0xe\n" /* offset r6 */ + "\t.byte 0x87\n\t.uleb128 0xd\n" /* offset r7 */ + "\t.byte 0x88\n\t.uleb128 0xc\n" /* offset r8 */ + "\t.byte 0x89\n\t.uleb128 0xb\n" /* offset r9 */ + "\t.byte 0x8a\n\t.uleb128 0xa\n" /* offset r10 */ + "\t.byte 0x8b\n\t.uleb128 0x9\n" /* offset r11 */ + "\t.byte 0x8c\n\t.uleb128 0x8\n" /* offset r12 */ + "\t.byte 0x8d\n\t.uleb128 0x7\n" /* offset r13 */ + "\t.byte 0x8e\n\t.uleb128 0x6\n" /* offset r14 */ + "\t.byte 0x8f\n\t.uleb128 0x5\n" /* offset r15 */ + "\t.align 8\n" + ".LEFDE0:\n\n", fcofs, CFRAME_SIZE+160); +#if LJ_HASFFI + fprintf(ctx->fp, + ".LSFDE1:\n" + "\t.long .LEFDE1-.LASFDE1\n" + ".LASFDE1:\n" + "\t.long .Lframe0\n" + "\t.quad lj_vm_ffi_call\n" + "\t.quad %d\n" + "\t.byte 0xe\n\t.uleb128 160\n" /* def_cfa_offset */ + "\t.byte 0xd\n\t.uleb128 0xd\n" /* def_cfa_register r13 (FP) */ + "\t.byte 0x86\n\t.uleb128 0xe\n" /* offset r6 */ + "\t.byte 0x87\n\t.uleb128 0xd\n" /* offset r7 */ + "\t.byte 0x88\n\t.uleb128 0xc\n" /* offset r8 */ + "\t.byte 0x89\n\t.uleb128 0xb\n" /* offset r9 */ + "\t.byte 0x8a\n\t.uleb128 0xa\n" /* offset r10 */ + "\t.byte 0x8b\n\t.uleb128 0x9\n" /* offset r11 */ + "\t.byte 0x8c\n\t.uleb128 0x8\n" /* offset r12 */ + "\t.byte 0x8d\n\t.uleb128 0x7\n" /* offset r13 */ + "\t.byte 0x8e\n\t.uleb128 0x6\n" /* offset r14 */ + "\t.byte 0x8f\n\t.uleb128 0x5\n" /* offset r15 */ + "\t.align 8\n" + ".LEFDE1:\n\n", (int)ctx->codesz - fcofs); +#endif +#if !LJ_NO_UNWIND + fprintf(ctx->fp, "\t.section .eh_frame,\"a\",@progbits\n"); + fprintf(ctx->fp, + ".Lframe1:\n" + "\t.long .LECIE1-.LSCIE1\n" + ".LSCIE1:\n" + "\t.long 0\n" + "\t.byte 0x1\n" + "\t.string \"zPR\"\n" + "\t.uleb128 0x1\n" + "\t.sleb128 -8\n" + "\t.byte 0xe\n" + "\t.uleb128 6\n" /* augmentation length */ + "\t.byte 0x1b\n" /* pcrel|sdata4 */ + "\t.long lj_err_unwind_dwarf-.\n" + "\t.byte 0x1b\n" /* pcrel|sdata4 */ + "\t.byte 0xc\n\t.uleb128 0xf\n\t.uleb128 160\n" + "\t.align 8\n" + ".LECIE1:\n\n"); + fprintf(ctx->fp, + ".LSFDE2:\n" + "\t.long .LEFDE2-.LASFDE2\n" + ".LASFDE2:\n" + "\t.long .LASFDE2-.Lframe1\n" + "\t.long .Lbegin-.\n" + "\t.long %d\n" + "\t.uleb128 0\n" /* augmentation length */ + "\t.byte 0xe\n\t.uleb128 %d\n" /* def_cfa_offset */ + "\t.byte 0x86\n\t.uleb128 0xe\n" /* offset r6 */ + "\t.byte 0x87\n\t.uleb128 0xd\n" /* offset r7 */ + "\t.byte 0x88\n\t.uleb128 0xc\n" /* offset r8 */ + "\t.byte 0x89\n\t.uleb128 0xb\n" /* offset r9 */ + "\t.byte 0x8a\n\t.uleb128 0xa\n" /* offset r10 */ + "\t.byte 0x8b\n\t.uleb128 0x9\n" /* offset r11 */ + "\t.byte 0x8c\n\t.uleb128 0x8\n" /* offset r12 */ + "\t.byte 0x8d\n\t.uleb128 0x7\n" /* offset r13 */ + "\t.byte 0x8e\n\t.uleb128 0x6\n" /* offset r14 */ + "\t.byte 0x8f\n\t.uleb128 0x5\n" /* offset r15 */ + "\t.align 8\n" + ".LEFDE2:\n\n", fcofs, CFRAME_SIZE+160); +#if LJ_HASFFI + fprintf(ctx->fp, + ".Lframe2:\n" + "\t.long .LECIE2-.LSCIE2\n" + ".LSCIE2:\n" + "\t.long 0\n" + "\t.byte 0x1\n" + "\t.string \"zR\"\n" + "\t.uleb128 0x1\n" + "\t.sleb128 -8\n" + "\t.byte 0xe\n" + "\t.uleb128 1\n" /* augmentation length */ + "\t.byte 0x1b\n" /* pcrel|sdata4 */ + "\t.byte 0xc\n\t.uleb128 0xf\n\t.uleb128 160\n" + "\t.align 8\n" + ".LECIE2:\n\n"); + fprintf(ctx->fp, + ".LSFDE3:\n" + "\t.long .LEFDE3-.LASFDE3\n" + ".LASFDE3:\n" + "\t.long .LASFDE3-.Lframe2\n" + "\t.long lj_vm_ffi_call-.\n" + "\t.long %d\n" + "\t.uleb128 0\n" /* augmentation length */ + "\t.byte 0xe\n\t.uleb128 160\n" /* def_cfa_offset */ + "\t.byte 0xd\n\t.uleb128 0xd\n" /* def_cfa_register r13 (FP) */ + "\t.byte 0x86\n\t.uleb128 0xe\n" /* offset r6 */ + "\t.byte 0x87\n\t.uleb128 0xd\n" /* offset r7 */ + "\t.byte 0x88\n\t.uleb128 0xc\n" /* offset r8 */ + "\t.byte 0x89\n\t.uleb128 0xb\n" /* offset r9 */ + "\t.byte 0x8a\n\t.uleb128 0xa\n" /* offset r10 */ + "\t.byte 0x8b\n\t.uleb128 0x9\n" /* offset r11 */ + "\t.byte 0x8c\n\t.uleb128 0x8\n" /* offset r12 */ + "\t.byte 0x8d\n\t.uleb128 0x7\n" /* offset r13 */ + "\t.byte 0x8e\n\t.uleb128 0x6\n" /* offset r14 */ + "\t.byte 0x8f\n\t.uleb128 0x5\n" /* offset r15 */ + "\t.align 8\n" + ".LEFDE3:\n\n", (int)ctx->codesz - fcofs); +#endif +#endif + break; + default: /* No other modes. */ + break; + } +} + |