diff options
Diffstat (limited to 'deps/LuaJIT/src/lj_asm_mips.h')
| -rw-r--r-- | deps/LuaJIT/src/lj_asm_mips.h | 2659 |
1 files changed, 0 insertions, 2659 deletions
diff --git a/deps/LuaJIT/src/lj_asm_mips.h b/deps/LuaJIT/src/lj_asm_mips.h deleted file mode 100644 index 3a4679b..0000000 --- a/deps/LuaJIT/src/lj_asm_mips.h +++ /dev/null @@ -1,2659 +0,0 @@ -/* -** MIPS IR assembler (SSA IR -> machine code). -** Copyright (C) 2005-2017 Mike Pall. See Copyright Notice in luajit.h -*/ - -/* -- Register allocator extensions --------------------------------------- */ - -/* Allocate a register with a hint. */ -static Reg ra_hintalloc(ASMState *as, IRRef ref, Reg hint, RegSet allow) -{ - Reg r = IR(ref)->r; - if (ra_noreg(r)) { - if (!ra_hashint(r) && !iscrossref(as, ref)) - ra_sethint(IR(ref)->r, hint); /* Propagate register hint. */ - r = ra_allocref(as, ref, allow); - } - ra_noweak(as, r); - return r; -} - -/* Allocate a register or RID_ZERO. */ -static Reg ra_alloc1z(ASMState *as, IRRef ref, RegSet allow) -{ - Reg r = IR(ref)->r; - if (ra_noreg(r)) { - if (!(allow & RSET_FPR) && irref_isk(ref) && get_kval(IR(ref)) == 0) - return RID_ZERO; - r = ra_allocref(as, ref, allow); - } else { - ra_noweak(as, r); - } - return r; -} - -/* Allocate two source registers for three-operand instructions. */ -static Reg ra_alloc2(ASMState *as, IRIns *ir, RegSet allow) -{ - IRIns *irl = IR(ir->op1), *irr = IR(ir->op2); - Reg left = irl->r, right = irr->r; - if (ra_hasreg(left)) { - ra_noweak(as, left); - if (ra_noreg(right)) - right = ra_alloc1z(as, ir->op2, rset_exclude(allow, left)); - else - ra_noweak(as, right); - } else if (ra_hasreg(right)) { - ra_noweak(as, right); - left = ra_alloc1z(as, ir->op1, rset_exclude(allow, right)); - } else if (ra_hashint(right)) { - right = ra_alloc1z(as, ir->op2, allow); - left = ra_alloc1z(as, ir->op1, rset_exclude(allow, right)); - } else { - left = ra_alloc1z(as, ir->op1, allow); - right = ra_alloc1z(as, ir->op2, rset_exclude(allow, left)); - } - return left | (right << 8); -} - -/* -- Guard handling ------------------------------------------------------ */ - -/* Need some spare long-range jump slots, for out-of-range branches. */ -#define MIPS_SPAREJUMP 4 - -/* Setup spare long-range jump slots per mcarea. */ -static void asm_sparejump_setup(ASMState *as) -{ - MCode *mxp = as->mcbot; - if (((uintptr_t)mxp & (LJ_PAGESIZE-1)) == sizeof(MCLink)) { - lua_assert(MIPSI_NOP == 0); - memset(mxp, 0, MIPS_SPAREJUMP*2*sizeof(MCode)); - mxp += MIPS_SPAREJUMP*2; - lua_assert(mxp < as->mctop); - lj_mcode_sync(as->mcbot, mxp); - lj_mcode_commitbot(as->J, mxp); - as->mcbot = mxp; - as->mclim = as->mcbot + MCLIM_REDZONE; - } -} - -/* Setup exit stub after the end of each trace. */ -static void asm_exitstub_setup(ASMState *as) -{ - MCode *mxp = as->mctop; - /* sw TMP, 0(sp); j ->vm_exit_handler; li TMP, traceno */ - *--mxp = MIPSI_LI|MIPSF_T(RID_TMP)|as->T->traceno; - *--mxp = MIPSI_J|((((uintptr_t)(void *)lj_vm_exit_handler)>>2)&0x03ffffffu); - lua_assert(((uintptr_t)mxp ^ (uintptr_t)(void *)lj_vm_exit_handler)>>28 == 0); - *--mxp = MIPSI_SW|MIPSF_T(RID_TMP)|MIPSF_S(RID_SP)|0; - as->mctop = mxp; -} - -/* Keep this in-sync with exitstub_trace_addr(). */ -#define asm_exitstub_addr(as) ((as)->mctop) - -/* Emit conditional branch to exit for guard. */ -static void asm_guard(ASMState *as, MIPSIns mi, Reg rs, Reg rt) -{ - MCode *target = asm_exitstub_addr(as); - MCode *p = as->mcp; - if (LJ_UNLIKELY(p == as->invmcp)) { - as->invmcp = NULL; - as->loopinv = 1; - as->mcp = p+1; - mi = mi ^ ((mi>>28) == 1 ? 0x04000000u : 0x00010000u); /* Invert cond. */ - target = p; /* Patch target later in asm_loop_fixup. */ - } - emit_ti(as, MIPSI_LI, RID_TMP, as->snapno); - emit_branch(as, mi, rs, rt, target); -} - -/* -- Operand fusion ------------------------------------------------------ */ - -/* Limit linear search to this distance. Avoids O(n^2) behavior. */ -#define CONFLICT_SEARCH_LIM 31 - -/* Check if there's no conflicting instruction between curins and ref. */ -static int noconflict(ASMState *as, IRRef ref, IROp conflict) -{ - IRIns *ir = as->ir; - IRRef i = as->curins; - if (i > ref + CONFLICT_SEARCH_LIM) - return 0; /* Give up, ref is too far away. */ - while (--i > ref) - if (ir[i].o == conflict) - return 0; /* Conflict found. */ - return 1; /* Ok, no conflict. */ -} - -/* Fuse the array base of colocated arrays. */ -static int32_t asm_fuseabase(ASMState *as, IRRef ref) -{ - IRIns *ir = IR(ref); - if (ir->o == IR_TNEW && ir->op1 <= LJ_MAX_COLOSIZE && - !neverfuse(as) && noconflict(as, ref, IR_NEWREF)) - return (int32_t)sizeof(GCtab); - return 0; -} - -/* Fuse array/hash/upvalue reference into register+offset operand. */ -static Reg asm_fuseahuref(ASMState *as, IRRef ref, int32_t *ofsp, RegSet allow) -{ - IRIns *ir = IR(ref); - if (ra_noreg(ir->r)) { - if (ir->o == IR_AREF) { - if (mayfuse(as, ref)) { - if (irref_isk(ir->op2)) { - IRRef tab = IR(ir->op1)->op1; - int32_t ofs = asm_fuseabase(as, tab); - IRRef refa = ofs ? tab : ir->op1; - ofs += 8*IR(ir->op2)->i; - if (checki16(ofs)) { - *ofsp = ofs; - return ra_alloc1(as, refa, allow); - } - } - } - } else if (ir->o == IR_HREFK) { - if (mayfuse(as, ref)) { - int32_t ofs = (int32_t)(IR(ir->op2)->op2 * sizeof(Node)); - if (checki16(ofs)) { - *ofsp = ofs; - return ra_alloc1(as, ir->op1, allow); - } - } - } else if (ir->o == IR_UREFC) { - if (irref_isk(ir->op1)) { - GCfunc *fn = ir_kfunc(IR(ir->op1)); - intptr_t ofs = (intptr_t)&gcref(fn->l.uvptr[(ir->op2 >> 8)])->uv.tv; - intptr_t jgl = (intptr_t)J2G(as->J); - if ((uintptr_t)(ofs-jgl) < 65536) { - *ofsp = ofs-jgl-32768; - return RID_JGL; - } else { - *ofsp = (int16_t)ofs; - return ra_allock(as, ofs-(int16_t)ofs, allow); - } - } - } - } - *ofsp = 0; - return ra_alloc1(as, ref, allow); -} - -/* Fuse XLOAD/XSTORE reference into load/store operand. */ -static void asm_fusexref(ASMState *as, MIPSIns mi, Reg rt, IRRef ref, - RegSet allow, int32_t ofs) -{ - IRIns *ir = IR(ref); - Reg base; - if (ra_noreg(ir->r) && canfuse(as, ir)) { - if (ir->o == IR_ADD) { - intptr_t ofs2; - if (irref_isk(ir->op2) && (ofs2 = ofs + get_kval(IR(ir->op2)), - checki16(ofs2))) { - ref = ir->op1; - ofs = (int32_t)ofs2; - } - } else if (ir->o == IR_STRREF) { - intptr_t ofs2 = 65536; - lua_assert(ofs == 0); - ofs = (int32_t)sizeof(GCstr); - if (irref_isk(ir->op2)) { - ofs2 = ofs + get_kval(IR(ir->op2)); - ref = ir->op1; - } else if (irref_isk(ir->op1)) { - ofs2 = ofs + get_kval(IR(ir->op1)); - ref = ir->op2; - } - if (!checki16(ofs2)) { - /* NYI: Fuse ADD with constant. */ - Reg right, left = ra_alloc2(as, ir, allow); - right = (left >> 8); left &= 255; - emit_hsi(as, mi, rt, RID_TMP, ofs); - emit_dst(as, MIPSI_AADDU, RID_TMP, left, right); - return; - } - ofs = ofs2; - } - } - base = ra_alloc1(as, ref, allow); - emit_hsi(as, mi, rt, base, ofs); -} - -/* -- Calls --------------------------------------------------------------- */ - -/* Generate a call to a C function. */ -static void asm_gencall(ASMState *as, const CCallInfo *ci, IRRef *args) -{ - uint32_t n, nargs = CCI_XNARGS(ci); - int32_t ofs = LJ_32 ? 16 : 0; -#if LJ_SOFTFP - Reg gpr = REGARG_FIRSTGPR; -#else - Reg gpr, fpr = REGARG_FIRSTFPR; -#endif - if ((void *)ci->func) - emit_call(as, (void *)ci->func, 1); -#if !LJ_SOFTFP - for (gpr = REGARG_FIRSTGPR; gpr <= REGARG_LASTGPR; gpr++) - as->cost[gpr] = REGCOST(~0u, ASMREF_L); - gpr = REGARG_FIRSTGPR; -#endif - for (n = 0; n < nargs; n++) { /* Setup args. */ - IRRef ref = args[n]; - if (ref) { - IRIns *ir = IR(ref); -#if !LJ_SOFTFP - if (irt_isfp(ir->t) && fpr <= REGARG_LASTFPR && - !(ci->flags & CCI_VARARG)) { - lua_assert(rset_test(as->freeset, fpr)); /* Already evicted. */ - ra_leftov(as, fpr, ref); - fpr += LJ_32 ? 2 : 1; - gpr += (LJ_32 && irt_isnum(ir->t)) ? 2 : 1; - } else -#endif - { -#if LJ_32 && !LJ_SOFTFP - fpr = REGARG_LASTFPR+1; -#endif - if (LJ_32 && irt_isnum(ir->t)) gpr = (gpr+1) & ~1; - if (gpr <= REGARG_LASTGPR) { - lua_assert(rset_test(as->freeset, gpr)); /* Already evicted. */ -#if !LJ_SOFTFP - if (irt_isfp(ir->t)) { - RegSet of = as->freeset; - Reg r; - /* Workaround to protect argument GPRs from being used for remat. */ - as->freeset &= ~RSET_RANGE(REGARG_FIRSTGPR, REGARG_LASTGPR+1); - r = ra_alloc1(as, ref, RSET_FPR); - as->freeset |= (of & RSET_RANGE(REGARG_FIRSTGPR, REGARG_LASTGPR+1)); - if (irt_isnum(ir->t)) { -#if LJ_32 - emit_tg(as, MIPSI_MFC1, gpr+(LJ_BE?0:1), r+1); - emit_tg(as, MIPSI_MFC1, gpr+(LJ_BE?1:0), r); - lua_assert(rset_test(as->freeset, gpr+1)); /* Already evicted. */ - gpr += 2; -#else - emit_tg(as, MIPSI_DMFC1, gpr, r); - gpr++; fpr++; -#endif - } else if (irt_isfloat(ir->t)) { - emit_tg(as, MIPSI_MFC1, gpr, r); - gpr++; -#if LJ_64 - fpr++; -#endif - } - } else -#endif - { - ra_leftov(as, gpr, ref); - gpr++; -#if LJ_64 && !LJ_SOFTFP - fpr++; -#endif - } - } else { - Reg r = ra_alloc1z(as, ref, !LJ_SOFTFP && irt_isfp(ir->t) ? RSET_FPR : RSET_GPR); -#if LJ_32 - if (irt_isnum(ir->t)) ofs = (ofs + 4) & ~4; - emit_spstore(as, ir, r, ofs); - ofs += irt_isnum(ir->t) ? 8 : 4; -#else - emit_spstore(as, ir, r, ofs + ((LJ_BE && !irt_isfp(ir->t) && !irt_is64(ir->t)) ? 4 : 0)); - ofs += 8; -#endif - } - } - } else { -#if !LJ_SOFTFP - fpr = REGARG_LASTFPR+1; -#endif - if (gpr <= REGARG_LASTGPR) { - gpr++; -#if LJ_64 && !LJ_SOFTFP - fpr++; -#endif - } else { - ofs += LJ_32 ? 4 : 8; - } - } - checkmclim(as); - } -} - -/* Setup result reg/sp for call. Evict scratch regs. */ -static void asm_setupresult(ASMState *as, IRIns *ir, const CCallInfo *ci) -{ - RegSet drop = RSET_SCRATCH; -#if LJ_32 - int hiop = ((ir+1)->o == IR_HIOP && !irt_isnil((ir+1)->t)); -#endif -#if !LJ_SOFTFP - if ((ci->flags & CCI_NOFPRCLOBBER)) - drop &= ~RSET_FPR; -#endif - if (ra_hasreg(ir->r)) - rset_clear(drop, ir->r); /* Dest reg handled below. */ -#if LJ_32 - if (hiop && ra_hasreg((ir+1)->r)) - rset_clear(drop, (ir+1)->r); /* Dest reg handled below. */ -#endif - ra_evictset(as, drop); /* Evictions must be performed first. */ - if (ra_used(ir)) { - lua_assert(!irt_ispri(ir->t)); - if (!LJ_SOFTFP && irt_isfp(ir->t)) { - if ((ci->flags & CCI_CASTU64)) { - int32_t ofs = sps_scale(ir->s); - Reg dest = ir->r; - if (ra_hasreg(dest)) { - ra_free(as, dest); - ra_modified(as, dest); -#if LJ_32 - emit_tg(as, MIPSI_MTC1, RID_RETHI, dest+1); - emit_tg(as, MIPSI_MTC1, RID_RETLO, dest); -#else - emit_tg(as, MIPSI_DMTC1, RID_RET, dest); -#endif - } - if (ofs) { -#if LJ_32 - emit_tsi(as, MIPSI_SW, RID_RETLO, RID_SP, ofs+(LJ_BE?4:0)); - emit_tsi(as, MIPSI_SW, RID_RETHI, RID_SP, ofs+(LJ_BE?0:4)); -#else - emit_tsi(as, MIPSI_SD, RID_RET, RID_SP, ofs); -#endif - } - } else { - ra_destreg(as, ir, RID_FPRET); - } -#if LJ_32 - } else if (hiop) { - ra_destpair(as, ir); -#endif - } else { - ra_destreg(as, ir, RID_RET); - } - } -} - -static void asm_callx(ASMState *as, IRIns *ir) -{ - IRRef args[CCI_NARGS_MAX*2]; - CCallInfo ci; - IRRef func; - IRIns *irf; - ci.flags = asm_callx_flags(as, ir); - asm_collectargs(as, ir, &ci, args); - asm_setupresult(as, ir, &ci); - func = ir->op2; irf = IR(func); - if (irf->o == IR_CARG) { func = irf->op1; irf = IR(func); } - if (irref_isk(func)) { /* Call to constant address. */ - ci.func = (ASMFunction)(void *)get_kval(irf); - } else { /* Need specific register for indirect calls. */ - Reg r = ra_alloc1(as, func, RID2RSET(RID_CFUNCADDR)); - MCode *p = as->mcp; - if (r == RID_CFUNCADDR) - *--p = MIPSI_NOP; - else - *--p = MIPSI_MOVE | MIPSF_D(RID_CFUNCADDR) | MIPSF_S(r); - *--p = MIPSI_JALR | MIPSF_S(r); - as->mcp = p; - ci.func = (ASMFunction)(void *)0; - } - asm_gencall(as, &ci, args); -} - -#if !LJ_SOFTFP -static void asm_callround(ASMState *as, IRIns *ir, IRCallID id) -{ - /* The modified regs must match with the *.dasc implementation. */ - RegSet drop = RID2RSET(RID_R1)|RID2RSET(RID_R12)|RID2RSET(RID_FPRET)| - RID2RSET(RID_F2)|RID2RSET(RID_F4)|RID2RSET(REGARG_FIRSTFPR); - if (ra_hasreg(ir->r)) rset_clear(drop, ir->r); - ra_evictset(as, drop); - ra_destreg(as, ir, RID_FPRET); - emit_call(as, (void *)lj_ir_callinfo[id].func, 0); - ra_leftov(as, REGARG_FIRSTFPR, ir->op1); -} -#endif - -/* -- Returns ------------------------------------------------------------- */ - -/* Return to lower frame. Guard that it goes to the right spot. */ -static void asm_retf(ASMState *as, IRIns *ir) -{ - Reg base = ra_alloc1(as, REF_BASE, RSET_GPR); - void *pc = ir_kptr(IR(ir->op2)); - int32_t delta = 1+LJ_FR2+bc_a(*((const BCIns *)pc - 1)); - as->topslot -= (BCReg)delta; - if ((int32_t)as->topslot < 0) as->topslot = 0; - irt_setmark(IR(REF_BASE)->t); /* Children must not coalesce with BASE reg. */ - emit_setgl(as, base, jit_base); - emit_addptr(as, base, -8*delta); - asm_guard(as, MIPSI_BNE, RID_TMP, - ra_allock(as, igcptr(pc), rset_exclude(RSET_GPR, base))); - emit_tsi(as, MIPSI_AL, RID_TMP, base, -8); -} - -/* -- Type conversions ---------------------------------------------------- */ - -#if !LJ_SOFTFP -static void asm_tointg(ASMState *as, IRIns *ir, Reg left) -{ - Reg tmp = ra_scratch(as, rset_exclude(RSET_FPR, left)); - Reg dest = ra_dest(as, ir, RSET_GPR); - asm_guard(as, MIPSI_BC1F, 0, 0); - emit_fgh(as, MIPSI_C_EQ_D, 0, tmp, left); - emit_fg(as, MIPSI_CVT_D_W, tmp, tmp); - emit_tg(as, MIPSI_MFC1, dest, tmp); - emit_fg(as, MIPSI_CVT_W_D, tmp, left); -} - -static void asm_tobit(ASMState *as, IRIns *ir) -{ - RegSet allow = RSET_FPR; - Reg dest = ra_dest(as, ir, RSET_GPR); - Reg left = ra_alloc1(as, ir->op1, allow); - Reg right = ra_alloc1(as, ir->op2, rset_clear(allow, left)); - Reg tmp = ra_scratch(as, rset_clear(allow, right)); - emit_tg(as, MIPSI_MFC1, dest, tmp); - emit_fgh(as, MIPSI_ADD_D, tmp, left, right); -} -#elif LJ_64 /* && LJ_SOFTFP */ -static void asm_tointg(ASMState *as, IRIns *ir, Reg r) -{ - /* The modified regs must match with the *.dasc implementation. */ - RegSet drop = RID2RSET(REGARG_FIRSTGPR)|RID2RSET(RID_RET)|RID2RSET(RID_RET+1)| - RID2RSET(RID_R1)|RID2RSET(RID_R12); - if (ra_hasreg(ir->r)) rset_clear(drop, ir->r); - ra_evictset(as, drop); - /* Return values are in RID_RET (converted value) and RID_RET+1 (status). */ - ra_destreg(as, ir, RID_RET); - asm_guard(as, MIPSI_BNE, RID_RET+1, RID_ZERO); - emit_call(as, (void *)lj_ir_callinfo[IRCALL_lj_vm_tointg].func, 0); - if (r == RID_NONE) - ra_leftov(as, REGARG_FIRSTGPR, ir->op1); - else if (r != REGARG_FIRSTGPR) - emit_move(as, REGARG_FIRSTGPR, r); -} - -static void asm_tobit(ASMState *as, IRIns *ir) -{ - Reg dest = ra_dest(as, ir, RSET_GPR); - emit_dta(as, MIPSI_SLL, dest, dest, 0); - asm_callid(as, ir, IRCALL_lj_vm_tobit); -} -#endif - -static void asm_conv(ASMState *as, IRIns *ir) -{ - IRType st = (IRType)(ir->op2 & IRCONV_SRCMASK); -#if !LJ_SOFTFP32 - int stfp = (st == IRT_NUM || st == IRT_FLOAT); -#endif -#if LJ_64 - int st64 = (st == IRT_I64 || st == IRT_U64 || st == IRT_P64); -#endif - IRRef lref = ir->op1; -#if LJ_32 - lua_assert(!(irt_isint64(ir->t) || - (st == IRT_I64 || st == IRT_U64))); /* Handled by SPLIT. */ -#endif -#if LJ_SOFTFP32 - /* FP conversions are handled by SPLIT. */ - lua_assert(!irt_isfp(ir->t) && !(st == IRT_NUM || st == IRT_FLOAT)); - /* Can't check for same types: SPLIT uses CONV int.int + BXOR for sfp NEG. */ -#else - lua_assert(irt_type(ir->t) != st); -#if !LJ_SOFTFP - if (irt_isfp(ir->t)) { - Reg dest = ra_dest(as, ir, RSET_FPR); - if (stfp) { /* FP to FP conversion. */ - emit_fg(as, st == IRT_NUM ? MIPSI_CVT_S_D : MIPSI_CVT_D_S, - dest, ra_alloc1(as, lref, RSET_FPR)); - } else if (st == IRT_U32) { /* U32 to FP conversion. */ - /* y = (x ^ 0x8000000) + 2147483648.0 */ - Reg left = ra_alloc1(as, lref, RSET_GPR); - Reg tmp = ra_scratch(as, rset_exclude(RSET_FPR, dest)); - if (irt_isfloat(ir->t)) - emit_fg(as, MIPSI_CVT_S_D, dest, dest); - /* Must perform arithmetic with doubles to keep the precision. */ - emit_fgh(as, MIPSI_ADD_D, dest, dest, tmp); - emit_fg(as, MIPSI_CVT_D_W, dest, dest); - emit_lsptr(as, MIPSI_LDC1, (tmp & 31), - (void *)&as->J->k64[LJ_K64_2P31], RSET_GPR); - emit_tg(as, MIPSI_MTC1, RID_TMP, dest); - emit_dst(as, MIPSI_XOR, RID_TMP, RID_TMP, left); - emit_ti(as, MIPSI_LUI, RID_TMP, 0x8000); -#if LJ_64 - } else if(st == IRT_U64) { /* U64 to FP conversion. */ - /* if (x >= 1u<<63) y = (double)(int64_t)(x&(1u<<63)-1) + pow(2.0, 63) */ - Reg left = ra_alloc1(as, lref, RSET_GPR); - Reg tmp = ra_scratch(as, rset_exclude(RSET_FPR, dest)); - MCLabel l_end = emit_label(as); - if (irt_isfloat(ir->t)) { - emit_fgh(as, MIPSI_ADD_S, dest, dest, tmp); - emit_lsptr(as, MIPSI_LWC1, (tmp & 31), (void *)&as->J->k32[LJ_K32_2P63], - rset_exclude(RSET_GPR, left)); - emit_fg(as, MIPSI_CVT_S_L, dest, dest); - } else { - emit_fgh(as, MIPSI_ADD_D, dest, dest, tmp); - emit_lsptr(as, MIPSI_LDC1, (tmp & 31), (void *)&as->J->k64[LJ_K64_2P63], - rset_exclude(RSET_GPR, left)); - emit_fg(as, MIPSI_CVT_D_L, dest, dest); - } - emit_branch(as, MIPSI_BGEZ, left, RID_ZERO, l_end); - emit_tg(as, MIPSI_DMTC1, RID_TMP, dest); - emit_tsml(as, MIPSI_DEXTM, RID_TMP, left, 30, 0); -#endif - } else { /* Integer to FP conversion. */ - Reg left = ra_alloc1(as, lref, RSET_GPR); -#if LJ_32 - emit_fg(as, irt_isfloat(ir->t) ? MIPSI_CVT_S_W : MIPSI_CVT_D_W, - dest, dest); - emit_tg(as, MIPSI_MTC1, left, dest); -#else - MIPSIns mi = irt_isfloat(ir->t) ? - (st64 ? MIPSI_CVT_S_L : MIPSI_CVT_S_W) : - (st64 ? MIPSI_CVT_D_L : MIPSI_CVT_D_W); - emit_fg(as, mi, dest, dest); - emit_tg(as, st64 ? MIPSI_DMTC1 : MIPSI_MTC1, left, dest); -#endif - } - } else if (stfp) { /* FP to integer conversion. */ - if (irt_isguard(ir->t)) { - /* Checked conversions are only supported from number to int. */ - lua_assert(irt_isint(ir->t) && st == IRT_NUM); - asm_tointg(as, ir, ra_alloc1(as, lref, RSET_FPR)); - } else { - Reg dest = ra_dest(as, ir, RSET_GPR); - Reg left = ra_alloc1(as, lref, RSET_FPR); - Reg tmp = ra_scratch(as, rset_exclude(RSET_FPR, left)); - if (irt_isu32(ir->t)) { /* FP to U32 conversion. */ - /* y = (int)floor(x - 2147483648.0) ^ 0x80000000 */ - emit_dst(as, MIPSI_XOR, dest, dest, RID_TMP); - emit_ti(as, MIPSI_LUI, RID_TMP, 0x8000); - emit_tg(as, MIPSI_MFC1, dest, tmp); - emit_fg(as, st == IRT_FLOAT ? MIPSI_FLOOR_W_S : MIPSI_FLOOR_W_D, - tmp, tmp); - emit_fgh(as, st == IRT_FLOAT ? MIPSI_SUB_S : MIPSI_SUB_D, - tmp, left, tmp); - if (st == IRT_FLOAT) - emit_lsptr(as, MIPSI_LWC1, (tmp & 31), - (void *)&as->J->k32[LJ_K32_2P31], RSET_GPR); - else - emit_lsptr(as, MIPSI_LDC1, (tmp & 31), - (void *)&as->J->k64[LJ_K64_2P31], RSET_GPR); -#if LJ_64 - } else if (irt_isu64(ir->t)) { /* FP to U64 conversion. */ - MCLabel l_end; - emit_tg(as, MIPSI_DMFC1, dest, tmp); - l_end = emit_label(as); - /* For inputs >= 2^63 add -2^64 and convert again. */ - if (st == IRT_NUM) { - emit_fg(as, MIPSI_TRUNC_L_D, tmp, tmp); - emit_fgh(as, MIPSI_ADD_D, tmp, left, tmp); - emit_lsptr(as, MIPSI_LDC1, (tmp & 31), - (void *)&as->J->k64[LJ_K64_M2P64], - rset_exclude(RSET_GPR, dest)); - emit_fg(as, MIPSI_TRUNC_L_D, tmp, left); /* Delay slot. */ - emit_branch(as, MIPSI_BC1T, 0, 0, l_end); - emit_fgh(as, MIPSI_C_OLT_D, 0, left, tmp); - emit_lsptr(as, MIPSI_LDC1, (tmp & 31), - (void *)&as->J->k64[LJ_K64_2P63], - rset_exclude(RSET_GPR, dest)); - } else { - emit_fg(as, MIPSI_TRUNC_L_S, tmp, tmp); - emit_fgh(as, MIPSI_ADD_S, tmp, left, tmp); - emit_lsptr(as, MIPSI_LWC1, (tmp & 31), - (void *)&as->J->k32[LJ_K32_M2P64], - rset_exclude(RSET_GPR, dest)); - emit_fg(as, MIPSI_TRUNC_L_S, tmp, left); /* Delay slot. */ - emit_branch(as, MIPSI_BC1T, 0, 0, l_end); - emit_fgh(as, MIPSI_C_OLT_S, 0, left, tmp); - emit_lsptr(as, MIPSI_LWC1, (tmp & 31), - (void *)&as->J->k32[LJ_K32_2P63], - rset_exclude(RSET_GPR, dest)); - } -#endif - } else { -#if LJ_32 - emit_tg(as, MIPSI_MFC1, dest, tmp); - emit_fg(as, st == IRT_FLOAT ? MIPSI_TRUNC_W_S : MIPSI_TRUNC_W_D, - tmp, left); -#else - MIPSIns mi = irt_is64(ir->t) ? - (st == IRT_NUM ? MIPSI_TRUNC_L_D : MIPSI_TRUNC_L_S) : - (st == IRT_NUM ? MIPSI_TRUNC_W_D : MIPSI_TRUNC_W_S); - emit_tg(as, irt_is64(ir->t) ? MIPSI_DMFC1 : MIPSI_MFC1, dest, left); - emit_fg(as, mi, left, left); -#endif - } - } - } else -#else - if (irt_isfp(ir->t)) { -#if LJ_64 && LJ_HASFFI - if (stfp) { /* FP to FP conversion. */ - asm_callid(as, ir, irt_isnum(ir->t) ? IRCALL_softfp_f2d : - IRCALL_softfp_d2f); - } else { /* Integer to FP conversion. */ - IRCallID cid = ((IRT_IS64 >> st) & 1) ? - (irt_isnum(ir->t) ? - (st == IRT_I64 ? IRCALL_fp64_l2d : IRCALL_fp64_ul2d) : - (st == IRT_I64 ? IRCALL_fp64_l2f : IRCALL_fp64_ul2f)) : - (irt_isnum(ir->t) ? - (st == IRT_INT ? IRCALL_softfp_i2d : IRCALL_softfp_ui2d) : - (st == IRT_INT ? IRCALL_softfp_i2f : IRCALL_softfp_ui2f)); - asm_callid(as, ir, cid); - } -#else - asm_callid(as, ir, IRCALL_softfp_i2d); -#endif - } else if (stfp) { /* FP to integer conversion. */ - if (irt_isguard(ir->t)) { - /* Checked conversions are only supported from number to int. */ - lua_assert(irt_isint(ir->t) && st == IRT_NUM); - asm_tointg(as, ir, RID_NONE); - } else { - IRCallID cid = irt_is64(ir->t) ? - ((st == IRT_NUM) ? - (irt_isi64(ir->t) ? IRCALL_fp64_d2l : IRCALL_fp64_d2ul) : - (irt_isi64(ir->t) ? IRCALL_fp64_f2l : IRCALL_fp64_f2ul)) : - ((st == IRT_NUM) ? - (irt_isint(ir->t) ? IRCALL_softfp_d2i : IRCALL_softfp_d2ui) : - (irt_isint(ir->t) ? IRCALL_softfp_f2i : IRCALL_softfp_f2ui)); - asm_callid(as, ir, cid); - } - } else -#endif -#endif - { - Reg dest = ra_dest(as, ir, RSET_GPR); - if (st >= IRT_I8 && st <= IRT_U16) { /* Extend to 32 bit integer. */ - Reg left = ra_alloc1(as, ir->op1, RSET_GPR); - lua_assert(irt_isint(ir->t) || irt_isu32(ir->t)); - if ((ir->op2 & IRCONV_SEXT)) { - if (LJ_64 || (as->flags & JIT_F_MIPSXXR2)) { - emit_dst(as, st == IRT_I8 ? MIPSI_SEB : MIPSI_SEH, dest, 0, left); - } else { - uint32_t shift = st == IRT_I8 ? 24 : 16; - emit_dta(as, MIPSI_SRA, dest, dest, shift); - emit_dta(as, MIPSI_SLL, dest, left, shift); - } - } else { - emit_tsi(as, MIPSI_ANDI, dest, left, - (int32_t)(st == IRT_U8 ? 0xff : 0xffff)); - } - } else { /* 32/64 bit integer conversions. */ -#if LJ_32 - /* Only need to handle 32/32 bit no-op (cast) on 32 bit archs. */ - ra_leftov(as, dest, lref); /* Do nothing, but may need to move regs. */ -#else - if (irt_is64(ir->t)) { - if (st64) { - /* 64/64 bit no-op (cast)*/ - ra_leftov(as, dest, lref); - } else { - Reg left = ra_alloc1(as, lref, RSET_GPR); - if ((ir->op2 & IRCONV_SEXT)) { /* 32 to 64 bit sign extension. */ - emit_dta(as, MIPSI_SLL, dest, left, 0); - } else { /* 32 to 64 bit zero extension. */ - emit_tsml(as, MIPSI_DEXT, dest, left, 31, 0); - } - } - } else { - if (st64) { - /* This is either a 32 bit reg/reg mov which zeroes the hiword - ** or a load of the loword from a 64 bit address. - */ - Reg left = ra_alloc1(as, lref, RSET_GPR); - emit_tsml(as, MIPSI_DEXT, dest, left, 31, 0); - } else { /* 32/32 bit no-op (cast). */ - /* Do nothing, but may need to move regs. */ - ra_leftov(as, dest, lref); - } - } -#endif - } - } -} - -static void asm_strto(ASMState *as, IRIns *ir) -{ - const CCallInfo *ci = &lj_ir_callinfo[IRCALL_lj_strscan_num]; - IRRef args[2]; - int32_t ofs = 0; -#if LJ_SOFTFP32 - ra_evictset(as, RSET_SCRATCH); - if (ra_used(ir)) { - if (ra_hasspill(ir->s) && ra_hasspill((ir+1)->s) && - (ir->s & 1) == LJ_BE && (ir->s ^ 1) == (ir+1)->s) { - int i; - for (i = 0; i < 2; i++) { - Reg r = (ir+i)->r; - if (ra_hasreg(r)) { - ra_free(as, r); - ra_modified(as, r); - emit_spload(as, ir+i, r, sps_scale((ir+i)->s)); - } - } - ofs = sps_scale(ir->s & ~1); - } else { - Reg rhi = ra_dest(as, ir+1, RSET_GPR); - Reg rlo = ra_dest(as, ir, rset_exclude(RSET_GPR, rhi)); - emit_tsi(as, MIPSI_LW, rhi, RID_SP, ofs+(LJ_BE?0:4)); - emit_tsi(as, MIPSI_LW, rlo, RID_SP, ofs+(LJ_BE?4:0)); - } - } -#else - RegSet drop = RSET_SCRATCH; - if (ra_hasreg(ir->r)) rset_set(drop, ir->r); /* Spill dest reg (if any). */ - ra_evictset(as, drop); - ofs = sps_scale(ir->s); -#endif - asm_guard(as, MIPSI_BEQ, RID_RET, RID_ZERO); /* Test return status. */ - args[0] = ir->op1; /* GCstr *str */ - args[1] = ASMREF_TMP1; /* TValue *n */ - asm_gencall(as, ci, args); - /* Store the result to the spill slot or temp slots. */ - emit_tsi(as, MIPSI_AADDIU, ra_releasetmp(as, ASMREF_TMP1), - RID_SP, ofs); -} - -/* -- Memory references --------------------------------------------------- */ - -#if LJ_64 -/* Store tagged value for ref at base+ofs. */ -static void asm_tvstore64(ASMState *as, Reg base, int32_t ofs, IRRef ref) -{ - RegSet allow = rset_exclude(RSET_GPR, base); - IRIns *ir = IR(ref); - lua_assert(irt_ispri(ir->t) || irt_isaddr(ir->t) || irt_isinteger(ir->t)); - if (irref_isk(ref)) { - TValue k; - lj_ir_kvalue(as->J->L, &k, ir); - emit_tsi(as, MIPSI_SD, ra_allock(as, (int64_t)k.u64, allow), base, ofs); - } else { - Reg src = ra_alloc1(as, ref, allow); - Reg type = ra_allock(as, (int64_t)irt_toitype(ir->t) << 47, - rset_exclude(allow, src)); - emit_tsi(as, MIPSI_SD, RID_TMP, base, ofs); - if (irt_isinteger(ir->t)) { - emit_dst(as, MIPSI_DADDU, RID_TMP, RID_TMP, type); - emit_tsml(as, MIPSI_DEXT, RID_TMP, src, 31, 0); - } else { - emit_dst(as, MIPSI_DADDU, RID_TMP, src, type); - } - } -} -#endif - -/* Get pointer to TValue. */ -static void asm_tvptr(ASMState *as, Reg dest, IRRef ref) -{ - IRIns *ir = IR(ref); - if (irt_isnum(ir->t)) { - if (irref_isk(ref)) /* Use the number constant itself as a TValue. */ - ra_allockreg(as, igcptr(ir_knum(ir)), dest); - else /* Otherwise force a spill and use the spill slot. */ - emit_tsi(as, MIPSI_AADDIU, dest, RID_SP, ra_spill(as, ir)); - } else { - /* Otherwise use g->tmptv to hold the TValue. */ -#if LJ_32 - RegSet allow = rset_exclude(RSET_GPR, dest); - Reg type; - emit_tsi(as, MIPSI_ADDIU, dest, RID_JGL, (int32_t)(offsetof(global_State, tmptv)-32768)); - if (!irt_ispri(ir->t)) { - Reg src = ra_alloc1(as, ref, allow); - emit_setgl(as, src, tmptv.gcr); - } - if (LJ_SOFTFP && (ir+1)->o == IR_HIOP) - type = ra_alloc1(as, ref+1, allow); - else - type = ra_allock(as, (int32_t)irt_toitype(ir->t), allow); - emit_setgl(as, type, tmptv.it); -#else - asm_tvstore64(as, dest, 0, ref); - emit_tsi(as, MIPSI_DADDIU, dest, RID_JGL, - (int32_t)(offsetof(global_State, tmptv)-32768)); -#endif - } -} - -static void asm_aref(ASMState *as, IRIns *ir) -{ - Reg dest = ra_dest(as, ir, RSET_GPR); - Reg idx, base; - if (irref_isk(ir->op2)) { - IRRef tab = IR(ir->op1)->op1; - int32_t ofs = asm_fuseabase(as, tab); - IRRef refa = ofs ? tab : ir->op1; - ofs += 8*IR(ir->op2)->i; - if (checki16(ofs)) { - base = ra_alloc1(as, refa, RSET_GPR); - emit_tsi(as, MIPSI_AADDIU, dest, base, ofs); - return; - } - } - base = ra_alloc1(as, ir->op1, RSET_GPR); - idx = ra_alloc1(as, ir->op2, rset_exclude(RSET_GPR, base)); - emit_dst(as, MIPSI_AADDU, dest, RID_TMP, base); - emit_dta(as, MIPSI_SLL, RID_TMP, idx, 3); -} - -/* Inlined hash lookup. Specialized for key type and for const keys. -** The equivalent C code is: -** Node *n = hashkey(t, key); -** do { -** if (lj_obj_equal(&n->key, key)) return &n->val; -** } while ((n = nextnode(n))); -** return niltv(L); -*/ -static void asm_href(ASMState *as, IRIns *ir, IROp merge) -{ - RegSet allow = RSET_GPR; - int destused = ra_used(ir); - Reg dest = ra_dest(as, ir, allow); - Reg tab = ra_alloc1(as, ir->op1, rset_clear(allow, dest)); - Reg key = RID_NONE, type = RID_NONE, tmpnum = RID_NONE, tmp1 = RID_TMP, tmp2; -#if LJ_64 - Reg cmp64 = RID_NONE; -#endif - IRRef refkey = ir->op2; - IRIns *irkey = IR(refkey); - int isk = irref_isk(refkey); - IRType1 kt = irkey->t; - uint32_t khash; - MCLabel l_end, l_loop, l_next; - - rset_clear(allow, tab); -#if LJ_SOFTFP32 - if (!isk) { - key = ra_alloc1(as, refkey, allow); - rset_clear(allow, key); - if (irkey[1].o == IR_HIOP) { - if (ra_hasreg((irkey+1)->r)) { - type = tmpnum = (irkey+1)->r; - tmp1 = ra_scratch(as, allow); - rset_clear(allow, tmp1); - ra_noweak(as, tmpnum); - } else { - type = tmpnum = ra_allocref(as, refkey+1, allow); - } - rset_clear(allow, tmpnum); - } else { - type = ra_allock(as, (int32_t)irt_toitype(irkey->t), allow); - rset_clear(allow, type); - } - } -#else - if (!LJ_SOFTFP && irt_isnum(kt)) { - key = ra_alloc1(as, refkey, RSET_FPR); - tmpnum = ra_scratch(as, rset_exclude(RSET_FPR, key)); - } else if (!irt_ispri(kt)) { - key = ra_alloc1(as, refkey, allow); - rset_clear(allow, key); -#if LJ_32 - type = ra_allock(as, (int32_t)irt_toitype(irkey->t), allow); - rset_clear(allow, type); -#endif - } -#endif - tmp2 = ra_scratch(as, allow); - rset_clear(allow, tmp2); -#if LJ_64 - if (LJ_SOFTFP || !irt_isnum(kt)) { - /* Allocate cmp64 register used for 64-bit comparisons */ - if (LJ_SOFTFP && irt_isnum(kt)) { - cmp64 = key; - } else if (!isk && irt_isaddr(kt)) { - cmp64 = tmp2; - } else { - int64_t k; - if (isk && irt_isaddr(kt)) { - k = ((int64_t)irt_toitype(irkey->t) << 47) | irkey[1].tv.u64; - } else { - lua_assert(irt_ispri(kt) && !irt_isnil(kt)); - k = ~((int64_t)~irt_toitype(ir->t) << 47); - } - cmp64 = ra_allock(as, k, allow); - rset_clear(allow, cmp64); - } - } -#endif - - /* Key not found in chain: jump to exit (if merged) or load niltv. */ - l_end = emit_label(as); - as->invmcp = NULL; - if (merge == IR_NE) - asm_guard(as, MIPSI_B, RID_ZERO, RID_ZERO); - else if (destused) - emit_loada(as, dest, niltvg(J2G(as->J))); - /* Follow hash chain until the end. */ - emit_move(as, dest, tmp1); - l_loop = --as->mcp; - emit_tsi(as, MIPSI_AL, tmp1, dest, (int32_t)offsetof(Node, next)); - l_next = emit_label(as); - - /* Type and value comparison. */ - if (merge == IR_EQ) { /* Must match asm_guard(). */ - emit_ti(as, MIPSI_LI, RID_TMP, as->snapno); - l_end = asm_exitstub_addr(as); - } - if (!LJ_SOFTFP && irt_isnum(kt)) { - emit_branch(as, MIPSI_BC1T, 0, 0, l_end); - emit_fgh(as, MIPSI_C_EQ_D, 0, tmpnum, key); - *--as->mcp = MIPSI_NOP; /* Avoid NaN comparison overhead. */ - emit_branch(as, MIPSI_BEQ, tmp1, RID_ZERO, l_next); - emit_tsi(as, MIPSI_SLTIU, tmp1, tmp1, (int32_t)LJ_TISNUM); -#if LJ_32 - emit_hsi(as, MIPSI_LDC1, tmpnum, dest, (int32_t)offsetof(Node, key.n)); - } else { - if (irt_ispri(kt)) { - emit_branch(as, MIPSI_BEQ, tmp1, type, l_end); - } else { - emit_branch(as, MIPSI_BEQ, tmp2, key, l_end); - emit_tsi(as, MIPSI_LW, tmp2, dest, (int32_t)offsetof(Node, key.gcr)); - emit_branch(as, MIPSI_BNE, tmp1, type, l_next); - } - } - emit_tsi(as, MIPSI_LW, tmp1, dest, (int32_t)offsetof(Node, key.it)); - *l_loop = MIPSI_BNE | MIPSF_S(tmp1) | ((as->mcp-l_loop-1) & 0xffffu); -#else - emit_dta(as, MIPSI_DSRA32, tmp1, tmp1, 15); - emit_tg(as, MIPSI_DMTC1, tmp1, tmpnum); - emit_tsi(as, MIPSI_LD, tmp1, dest, (int32_t)offsetof(Node, key.u64)); - } else { - emit_branch(as, MIPSI_BEQ, tmp1, cmp64, l_end); - emit_tsi(as, MIPSI_LD, tmp1, dest, (int32_t)offsetof(Node, key.u64)); - } - *l_loop = MIPSI_BNE | MIPSF_S(tmp1) | ((as->mcp-l_loop-1) & 0xffffu); - if (!isk && irt_isaddr(kt)) { - type = ra_allock(as, (int64_t)irt_toitype(kt) << 47, allow); - emit_dst(as, MIPSI_DADDU, tmp2, key, type); - rset_clear(allow, type); - } -#endif - - /* Load main position relative to tab->node into dest. */ - khash = isk ? ir_khash(irkey) : 1; - if (khash == 0) { - emit_tsi(as, MIPSI_AL, dest, tab, (int32_t)offsetof(GCtab, node)); - } else { - Reg tmphash = tmp1; - if (isk) - tmphash = ra_allock(as, khash, allow); - emit_dst(as, MIPSI_AADDU, dest, dest, tmp1); - lua_assert(sizeof(Node) == 24); - emit_dst(as, MIPSI_SUBU, tmp1, tmp2, tmp1); - emit_dta(as, MIPSI_SLL, tmp1, tmp1, 3); - emit_dta(as, MIPSI_SLL, tmp2, tmp1, 5); - emit_dst(as, MIPSI_AND, tmp1, tmp2, tmphash); - emit_tsi(as, MIPSI_AL, dest, tab, (int32_t)offsetof(GCtab, node)); - emit_tsi(as, MIPSI_LW, tmp2, tab, (int32_t)offsetof(GCtab, hmask)); - if (isk) { - /* Nothing to do. */ - } else if (irt_isstr(kt)) { - emit_tsi(as, MIPSI_LW, tmp1, key, (int32_t)offsetof(GCstr, hash)); - } else { /* Must match with hash*() in lj_tab.c. */ - emit_dst(as, MIPSI_SUBU, tmp1, tmp1, tmp2); - emit_rotr(as, tmp2, tmp2, dest, (-HASH_ROT3)&31); - emit_dst(as, MIPSI_XOR, tmp1, tmp1, tmp2); - emit_rotr(as, tmp1, tmp1, dest, (-HASH_ROT2-HASH_ROT1)&31); - emit_dst(as, MIPSI_SUBU, tmp2, tmp2, dest); -#if LJ_32 - if (LJ_SOFTFP ? (irkey[1].o == IR_HIOP) : irt_isnum(kt)) { - emit_dst(as, MIPSI_XOR, tmp2, tmp2, tmp1); - if ((as->flags & JIT_F_MIPSXXR2)) { - emit_dta(as, MIPSI_ROTR, dest, tmp1, (-HASH_ROT1)&31); - } else { - emit_dst(as, MIPSI_OR, dest, dest, tmp1); - emit_dta(as, MIPSI_SLL, tmp1, tmp1, HASH_ROT1); - emit_dta(as, MIPSI_SRL, dest, tmp1, (-HASH_ROT1)&31); - } - emit_dst(as, MIPSI_ADDU, tmp1, tmp1, tmp1); -#if LJ_SOFTFP - emit_ds(as, MIPSI_MOVE, tmp1, type); - emit_ds(as, MIPSI_MOVE, tmp2, key); -#else - emit_tg(as, MIPSI_MFC1, tmp2, key); - emit_tg(as, MIPSI_MFC1, tmp1, key+1); -#endif - } else { - emit_dst(as, MIPSI_XOR, tmp2, key, tmp1); - emit_rotr(as, dest, tmp1, tmp2, (-HASH_ROT1)&31); - emit_dst(as, MIPSI_ADDU, tmp1, key, ra_allock(as, HASH_BIAS, allow)); - } -#else - emit_dst(as, MIPSI_XOR, tmp2, tmp2, tmp1); - emit_dta(as, MIPSI_ROTR, dest, tmp1, (-HASH_ROT1)&31); - if (irt_isnum(kt)) { - emit_dst(as, MIPSI_ADDU, tmp1, tmp1, tmp1); - emit_dta(as, MIPSI_DSRA32, tmp1, LJ_SOFTFP ? key : tmp1, 0); - emit_dta(as, MIPSI_SLL, tmp2, LJ_SOFTFP ? key : tmp1, 0); -#if !LJ_SOFTFP - emit_tg(as, MIPSI_DMFC1, tmp1, key); -#endif - } else { - checkmclim(as); - emit_dta(as, MIPSI_DSRA32, tmp1, tmp1, 0); - emit_dta(as, MIPSI_SLL, tmp2, key, 0); - emit_dst(as, MIPSI_DADDU, tmp1, key, type); - } -#endif - } - } -} - -static void asm_hrefk(ASMState *as, IRIns *ir) -{ - IRIns *kslot = IR(ir->op2); - IRIns *irkey = IR(kslot->op1); - int32_t ofs = (int32_t)(kslot->op2 * sizeof(Node)); - int32_t kofs = ofs + (int32_t)offsetof(Node, key); - Reg dest = (ra_used(ir)||ofs > 32736) ? ra_dest(as, ir, RSET_GPR) : RID_NONE; - Reg node = ra_alloc1(as, ir->op1, RSET_GPR); - RegSet allow = rset_exclude(RSET_GPR, node); - Reg idx = node; -#if LJ_32 - Reg key = RID_NONE, type = RID_TMP; - int32_t lo, hi; -#else - Reg key = ra_scratch(as, allow); - int64_t k; -#endif - lua_assert(ofs % sizeof(Node) == 0); - if (ofs > 32736) { - idx = dest; - rset_clear(allow, dest); - kofs = (int32_t)offsetof(Node, key); - } else if (ra_hasreg(dest)) { - emit_tsi(as, MIPSI_AADDIU, dest, node, ofs); - } -#if LJ_32 - if (!irt_ispri(irkey->t)) { - key = ra_scratch(as, allow); - rset_clear(allow, key); - } - if (irt_isnum(irkey->t)) { - lo = (int32_t)ir_knum(irkey)->u32.lo; - hi = (int32_t)ir_knum(irkey)->u32.hi; - } else { - lo = irkey->i; - hi = irt_toitype(irkey->t); - if (!ra_hasreg(key)) - goto nolo; - } - asm_guard(as, MIPSI_BNE, key, lo ? ra_allock(as, lo, allow) : RID_ZERO); -nolo: - asm_guard(as, MIPSI_BNE, type, hi ? ra_allock(as, hi, allow) : RID_ZERO); - if (ra_hasreg(key)) emit_tsi(as, MIPSI_LW, key, idx, kofs+(LJ_BE?4:0)); - emit_tsi(as, MIPSI_LW, type, idx, kofs+(LJ_BE?0:4)); -#else - if (irt_ispri(irkey->t)) { - lua_assert(!irt_isnil(irkey->t)); - k = ~((int64_t)~irt_toitype(irkey->t) << 47); - } else if (irt_isnum(irkey->t)) { - k = (int64_t)ir_knum(irkey)->u64; - } else { - k = ((int64_t)irt_toitype(irkey->t) << 47) | (int64_t)ir_kgc(irkey); - } - asm_guard(as, MIPSI_BNE, key, ra_allock(as, k, allow)); - emit_tsi(as, MIPSI_LD, key, idx, kofs); -#endif - if (ofs > 32736) - emit_tsi(as, MIPSI_AADDU, dest, node, ra_allock(as, ofs, allow)); -} - -static void asm_uref(ASMState *as, IRIns *ir) -{ - Reg dest = ra_dest(as, ir, RSET_GPR); - if (irref_isk(ir->op1)) { - GCfunc *fn = ir_kfunc(IR(ir->op1)); - MRef *v = &gcref(fn->l.uvptr[(ir->op2 >> 8)])->uv.v; - emit_lsptr(as, MIPSI_AL, dest, v, RSET_GPR); - } else { - Reg uv = ra_scratch(as, RSET_GPR); - Reg func = ra_alloc1(as, ir->op1, RSET_GPR); - if (ir->o == IR_UREFC) { - asm_guard(as, MIPSI_BEQ, RID_TMP, RID_ZERO); - emit_tsi(as, MIPSI_AADDIU, dest, uv, (int32_t)offsetof(GCupval, tv)); - emit_tsi(as, MIPSI_LBU, RID_TMP, uv, (int32_t)offsetof(GCupval, closed)); - } else { - emit_tsi(as, MIPSI_AL, dest, uv, (int32_t)offsetof(GCupval, v)); - } - emit_tsi(as, MIPSI_AL, uv, func, (int32_t)offsetof(GCfuncL, uvptr) + - (int32_t)sizeof(MRef) * (int32_t)(ir->op2 >> 8)); - } -} - -static void asm_fref(ASMState *as, IRIns *ir) -{ - UNUSED(as); UNUSED(ir); - lua_assert(!ra_used(ir)); -} - -static void asm_strref(ASMState *as, IRIns *ir) -{ -#if LJ_32 - Reg dest = ra_dest(as, ir, RSET_GPR); - IRRef ref = ir->op2, refk = ir->op1; - int32_t ofs = (int32_t)sizeof(GCstr); - Reg r; - if (irref_isk(ref)) { - IRRef tmp = refk; refk = ref; ref = tmp; - } else if (!irref_isk(refk)) { - Reg right, left = ra_alloc1(as, ir->op1, RSET_GPR); - IRIns *irr = IR(ir->op2); - if (ra_hasreg(irr->r)) { - ra_noweak(as, irr->r); - right = irr->r; - } else if (mayfuse(as, irr->op2) && - irr->o == IR_ADD && irref_isk(irr->op2) && - checki16(ofs + IR(irr->op2)->i)) { - ofs += IR(irr->op2)->i; - right = ra_alloc1(as, irr->op1, rset_exclude(RSET_GPR, left)); - } else { - right = ra_allocref(as, ir->op2, rset_exclude(RSET_GPR, left)); - } - emit_tsi(as, MIPSI_ADDIU, dest, dest, ofs); - emit_dst(as, MIPSI_ADDU, dest, left, right); - return; - } - r = ra_alloc1(as, ref, RSET_GPR); - ofs += IR(refk)->i; - if (checki16(ofs)) - emit_tsi(as, MIPSI_ADDIU, dest, r, ofs); - else - emit_dst(as, MIPSI_ADDU, dest, r, - ra_allock(as, ofs, rset_exclude(RSET_GPR, r))); -#else - RegSet allow = RSET_GPR; - Reg dest = ra_dest(as, ir, allow); - Reg base = ra_alloc1(as, ir->op1, allow); - IRIns *irr = IR(ir->op2); - int32_t ofs = sizeof(GCstr); - rset_clear(allow, base); - if (irref_isk(ir->op2) && checki16(ofs + irr->i)) { - emit_tsi(as, MIPSI_DADDIU, dest, base, ofs + irr->i); - } else { - emit_tsi(as, MIPSI_DADDIU, dest, dest, ofs); - emit_dst(as, MIPSI_DADDU, dest, base, ra_alloc1(as, ir->op2, allow)); - } -#endif -} - -/* -- Loads and stores ---------------------------------------------------- */ - -static MIPSIns asm_fxloadins(IRIns *ir) -{ - switch (irt_type(ir->t)) { - case IRT_I8: return MIPSI_LB; - case IRT_U8: return MIPSI_LBU; - case IRT_I16: return MIPSI_LH; - case IRT_U16: return MIPSI_LHU; - case IRT_NUM: lua_assert(!LJ_SOFTFP32); if (!LJ_SOFTFP) return MIPSI_LDC1; - case IRT_FLOAT: if (!LJ_SOFTFP) return MIPSI_LWC1; - default: return (LJ_64 && irt_is64(ir->t)) ? MIPSI_LD : MIPSI_LW; - } -} - -static MIPSIns asm_fxstoreins(IRIns *ir) -{ - switch (irt_type(ir->t)) { - case IRT_I8: case IRT_U8: return MIPSI_SB; - case IRT_I16: case IRT_U16: return MIPSI_SH; - case IRT_NUM: lua_assert(!LJ_SOFTFP32); if (!LJ_SOFTFP) return MIPSI_SDC1; - case IRT_FLOAT: if (!LJ_SOFTFP) return MIPSI_SWC1; - default: return (LJ_64 && irt_is64(ir->t)) ? MIPSI_SD : MIPSI_SW; - } -} - -static void asm_fload(ASMState *as, IRIns *ir) -{ - Reg dest = ra_dest(as, ir, RSET_GPR); - MIPSIns mi = asm_fxloadins(ir); - Reg idx; - int32_t ofs; - if (ir->op1 == REF_NIL) { - idx = RID_JGL; - ofs = (ir->op2 << 2) - 32768 - GG_OFS(g); - } else { - idx = ra_alloc1(as, ir->op1, RSET_GPR); - if (ir->op2 == IRFL_TAB_ARRAY) { - ofs = asm_fuseabase(as, ir->op1); - if (ofs) { /* Turn the t->array load into an add for colocated arrays. */ - emit_tsi(as, MIPSI_AADDIU, dest, idx, ofs); - return; - } - } - ofs = field_ofs[ir->op2]; - } - lua_assert(!irt_isfp(ir->t)); - emit_tsi(as, mi, dest, idx, ofs); -} - -static void asm_fstore(ASMState *as, IRIns *ir) -{ - if (ir->r != RID_SINK) { - Reg src = ra_alloc1z(as, ir->op2, RSET_GPR); - IRIns *irf = IR(ir->op1); - Reg idx = ra_alloc1(as, irf->op1, rset_exclude(RSET_GPR, src)); - int32_t ofs = field_ofs[irf->op2]; - MIPSIns mi = asm_fxstoreins(ir); - lua_assert(!irt_isfp(ir->t)); - emit_tsi(as, mi, src, idx, ofs); - } -} - -static void asm_xload(ASMState *as, IRIns *ir) -{ - Reg dest = ra_dest(as, ir, - (!LJ_SOFTFP && irt_isfp(ir->t)) ? RSET_FPR : RSET_GPR); - lua_assert(!(ir->op2 & IRXLOAD_UNALIGNED)); - asm_fusexref(as, asm_fxloadins(ir), dest, ir->op1, RSET_GPR, 0); -} - -static void asm_xstore_(ASMState *as, IRIns *ir, int32_t ofs) -{ - if (ir->r != RID_SINK) { - Reg src = ra_alloc1z(as, ir->op2, - (!LJ_SOFTFP && irt_isfp(ir->t)) ? RSET_FPR : RSET_GPR); - asm_fusexref(as, asm_fxstoreins(ir), src, ir->op1, - rset_exclude(RSET_GPR, src), ofs); - } -} - -#define asm_xstore(as, ir) asm_xstore_(as, ir, 0) - -static void asm_ahuvload(ASMState *as, IRIns *ir) -{ - int hiop = (LJ_SOFTFP32 && (ir+1)->o == IR_HIOP); - Reg dest = RID_NONE, type = RID_TMP, idx; - RegSet allow = RSET_GPR; - int32_t ofs = 0; - IRType1 t = ir->t; - if (hiop) { - t.irt = IRT_NUM; - if (ra_used(ir+1)) { - type = ra_dest(as, ir+1, allow); - rset_clear(allow, type); - } - } - if (ra_used(ir)) { - lua_assert((LJ_SOFTFP32 ? 0 : irt_isnum(ir->t)) || - irt_isint(ir->t) || irt_isaddr(ir->t)); - dest = ra_dest(as, ir, (!LJ_SOFTFP && irt_isnum(t)) ? RSET_FPR : allow); - rset_clear(allow, dest); -#if LJ_64 - if (irt_isaddr(t)) - emit_tsml(as, MIPSI_DEXTM, dest, dest, 14, 0); - else if (irt_isint(t)) - emit_dta(as, MIPSI_SLL, dest, dest, 0); -#endif - } - idx = asm_fuseahuref(as, ir->op1, &ofs, allow); - rset_clear(allow, idx); - if (irt_isnum(t)) { - asm_guard(as, MIPSI_BEQ, RID_TMP, RID_ZERO); - emit_tsi(as, MIPSI_SLTIU, RID_TMP, type, (int32_t)LJ_TISNUM); - } else { - asm_guard(as, MIPSI_BNE, type, - ra_allock(as, (int32_t)irt_toitype(t), allow)); - } -#if LJ_32 - if (ra_hasreg(dest)) { - if (!LJ_SOFTFP && irt_isnum(t)) - emit_hsi(as, MIPSI_LDC1, dest, idx, ofs); - else - emit_tsi(as, MIPSI_LW, dest, idx, ofs+(LJ_BE?4:0)); - } - emit_tsi(as, MIPSI_LW, type, idx, ofs+(LJ_BE?0:4)); -#else - if (ra_hasreg(dest)) { - if (!LJ_SOFTFP && irt_isnum(t)) { - emit_hsi(as, MIPSI_LDC1, dest, idx, ofs); - dest = type; - } - } else { - dest = type; - } - emit_dta(as, MIPSI_DSRA32, type, dest, 15); - emit_tsi(as, MIPSI_LD, dest, idx, ofs); -#endif -} - -static void asm_ahustore(ASMState *as, IRIns *ir) -{ - RegSet allow = RSET_GPR; - Reg idx, src = RID_NONE, type = RID_NONE; - int32_t ofs = 0; - if (ir->r == RID_SINK) - return; - if (!LJ_SOFTFP32 && irt_isnum(ir->t)) { - src = ra_alloc1(as, ir->op2, LJ_SOFTFP ? RSET_GPR : RSET_FPR); - idx = asm_fuseahuref(as, ir->op1, &ofs, allow); - emit_hsi(as, LJ_SOFTFP ? MIPSI_SD : MIPSI_SDC1, src, idx, ofs); - } else { -#if LJ_32 - if (!irt_ispri(ir->t)) { - src = ra_alloc1(as, ir->op2, allow); - rset_clear(allow, src); - } - if (LJ_SOFTFP && (ir+1)->o == IR_HIOP) - type = ra_alloc1(as, (ir+1)->op2, allow); - else - type = ra_allock(as, (int32_t)irt_toitype(ir->t), allow); - rset_clear(allow, type); - idx = asm_fuseahuref(as, ir->op1, &ofs, allow); - if (ra_hasreg(src)) - emit_tsi(as, MIPSI_SW, src, idx, ofs+(LJ_BE?4:0)); - emit_tsi(as, MIPSI_SW, type, idx, ofs+(LJ_BE?0:4)); -#else - Reg tmp = RID_TMP; - if (irt_ispri(ir->t)) { - tmp = ra_allock(as, ~((int64_t)~irt_toitype(ir->t) << 47), allow); - rset_clear(allow, tmp); - } else { - src = ra_alloc1(as, ir->op2, allow); - rset_clear(allow, src); - type = ra_allock(as, (int64_t)irt_toitype(ir->t) << 47, allow); - rset_clear(allow, type); - } - idx = asm_fuseahuref(as, ir->op1, &ofs, allow); - emit_tsi(as, MIPSI_SD, tmp, idx, ofs); - if (ra_hasreg(src)) { - if (irt_isinteger(ir->t)) { - emit_dst(as, MIPSI_DADDU, tmp, tmp, type); - emit_tsml(as, MIPSI_DEXT, tmp, src, 31, 0); - } else { - emit_dst(as, MIPSI_DADDU, tmp, src, type); - } - } -#endif - } -} - -static void asm_sload(ASMState *as, IRIns *ir) -{ - Reg dest = RID_NONE, type = RID_NONE, base; - RegSet allow = RSET_GPR; - IRType1 t = ir->t; -#if LJ_32 - int32_t ofs = 8*((int32_t)ir->op1-1) + ((ir->op2 & IRSLOAD_FRAME) ? 4 : 0); - int hiop = (LJ_SOFTFP32 && (ir+1)->o == IR_HIOP); - if (hiop) - t.irt = IRT_NUM; -#else - int32_t ofs = 8*((int32_t)ir->op1-2); -#endif - lua_assert(!(ir->op2 & IRSLOAD_PARENT)); /* Handled by asm_head_side(). */ - lua_assert(irt_isguard(ir->t) || !(ir->op2 & IRSLOAD_TYPECHECK)); -#if LJ_SOFTFP32 - lua_assert(!(ir->op2 & IRSLOAD_CONVERT)); /* Handled by LJ_SOFTFP SPLIT. */ - if (hiop && ra_used(ir+1)) { - type = ra_dest(as, ir+1, allow); - rset_clear(allow, type); - } -#else - if ((ir->op2 & IRSLOAD_CONVERT) && irt_isguard(t) && irt_isint(t)) { - dest = ra_scratch(as, LJ_SOFTFP ? allow : RSET_FPR); - asm_tointg(as, ir, dest); - t.irt = IRT_NUM; /* Continue with a regular number type check. */ - } else -#endif - if (ra_used(ir)) { - lua_assert((LJ_SOFTFP32 ? 0 : irt_isnum(ir->t)) || - irt_isint(ir->t) || irt_isaddr(ir->t)); - dest = ra_dest(as, ir, (!LJ_SOFTFP && irt_isnum(t)) ? RSET_FPR : allow); - rset_clear(allow, dest); - base = ra_alloc1(as, REF_BASE, allow); - rset_clear(allow, base); - if (!LJ_SOFTFP32 && (ir->op2 & IRSLOAD_CONVERT)) { - if (irt_isint(t)) { - Reg tmp = ra_scratch(as, LJ_SOFTFP ? RSET_GPR : RSET_FPR); -#if LJ_SOFTFP - ra_evictset(as, rset_exclude(RSET_SCRATCH, dest)); - ra_destreg(as, ir, RID_RET); - emit_call(as, (void *)lj_ir_callinfo[IRCALL_softfp_d2i].func, 0); - if (tmp != REGARG_FIRSTGPR) - emit_move(as, REGARG_FIRSTGPR, tmp); -#else - emit_tg(as, MIPSI_MFC1, dest, tmp); - emit_fg(as, MIPSI_TRUNC_W_D, tmp, tmp); -#endif - dest = tmp; - t.irt = IRT_NUM; /* Check for original type. */ - } else { - Reg tmp = ra_scratch(as, RSET_GPR); -#if LJ_SOFTFP - ra_evictset(as, rset_exclude(RSET_SCRATCH, dest)); - ra_destreg(as, ir, RID_RET); - emit_call(as, (void *)lj_ir_callinfo[IRCALL_softfp_i2d].func, 0); - emit_dta(as, MIPSI_SLL, REGARG_FIRSTGPR, tmp, 0); -#else - emit_fg(as, MIPSI_CVT_D_W, dest, dest); - emit_tg(as, MIPSI_MTC1, tmp, dest); -#endif - dest = tmp; - t.irt = IRT_INT; /* Check for original type. */ - } - } -#if LJ_64 - else if (irt_isaddr(t)) { - /* Clear type from pointers. */ - emit_tsml(as, MIPSI_DEXTM, dest, dest, 14, 0); - } else if (irt_isint(t) && (ir->op2 & IRSLOAD_TYPECHECK)) { - /* Sign-extend integers. */ - emit_dta(as, MIPSI_SLL, dest, dest, 0); - } -#endif - goto dotypecheck; - } - base = ra_alloc1(as, REF_BASE, allow); - rset_clear(allow, base); -dotypecheck: -#if LJ_32 - if ((ir->op2 & IRSLOAD_TYPECHECK)) { - if (ra_noreg(type)) - type = RID_TMP; - if (irt_isnum(t)) { - asm_guard(as, MIPSI_BEQ, RID_TMP, RID_ZERO); - emit_tsi(as, MIPSI_SLTIU, RID_TMP, type, (int32_t)LJ_TISNUM); - } else { - Reg ktype = ra_allock(as, irt_toitype(t), allow); - asm_guard(as, MIPSI_BNE, type, ktype); - } - } - if (ra_hasreg(dest)) { - if (!LJ_SOFTFP && irt_isnum(t)) - emit_hsi(as, MIPSI_LDC1, dest, base, ofs); - else - emit_tsi(as, MIPSI_LW, dest, base, ofs ^ (LJ_BE?4:0)); - } - if (ra_hasreg(type)) - emit_tsi(as, MIPSI_LW, type, base, ofs ^ (LJ_BE?0:4)); -#else - if ((ir->op2 & IRSLOAD_TYPECHECK)) { - type = dest < RID_MAX_GPR ? dest : RID_TMP; - if (irt_ispri(t)) { - asm_guard(as, MIPSI_BNE, type, - ra_allock(as, ~((int64_t)~irt_toitype(t) << 47) , allow)); - } else { - if (irt_isnum(t)) { - asm_guard(as, MIPSI_BEQ, RID_TMP, RID_ZERO); - emit_tsi(as, MIPSI_SLTIU, RID_TMP, RID_TMP, (int32_t)LJ_TISNUM); - if (!LJ_SOFTFP && ra_hasreg(dest)) - emit_hsi(as, MIPSI_LDC1, dest, base, ofs); - } else { - asm_guard(as, MIPSI_BNE, RID_TMP, - ra_allock(as, (int32_t)irt_toitype(t), allow)); - } - emit_dta(as, MIPSI_DSRA32, RID_TMP, type, 15); - } - emit_tsi(as, MIPSI_LD, type, base, ofs); - } else if (ra_hasreg(dest)) { - if (!LJ_SOFTFP && irt_isnum(t)) - emit_hsi(as, MIPSI_LDC1, dest, base, ofs); - else - emit_tsi(as, irt_isint(t) ? MIPSI_LW : MIPSI_LD, dest, base, - ofs ^ ((LJ_BE && irt_isint(t)) ? 4 : 0)); - } -#endif -} - -/* -- Allocations --------------------------------------------------------- */ - -#if LJ_HASFFI -static void asm_cnew(ASMState *as, IRIns *ir) -{ - CTState *cts = ctype_ctsG(J2G(as->J)); - CTypeID id = (CTypeID)IR(ir->op1)->i; - CTSize sz; - CTInfo info = lj_ctype_info(cts, id, &sz); - const CCallInfo *ci = &lj_ir_callinfo[IRCALL_lj_mem_newgco]; - IRRef args[4]; - RegSet drop = RSET_SCRATCH; - lua_assert(sz != CTSIZE_INVALID || (ir->o == IR_CNEW && ir->op2 != REF_NIL)); - - as->gcsteps++; - if (ra_hasreg(ir->r)) - rset_clear(drop, ir->r); /* Dest reg handled below. */ - ra_evictset(as, drop); - if (ra_used(ir)) - ra_destreg(as, ir, RID_RET); /* GCcdata * */ - - /* Initialize immutable cdata object. */ - if (ir->o == IR_CNEWI) { - RegSet allow = (RSET_GPR & ~RSET_SCRATCH); -#if LJ_32 - int32_t ofs = sizeof(GCcdata); - if (sz == 8) { - ofs += 4; - lua_assert((ir+1)->o == IR_HIOP); - if (LJ_LE) ir++; - } - for (;;) { - Reg r = ra_alloc1z(as, ir->op2, allow); - emit_tsi(as, MIPSI_SW, r, RID_RET, ofs); - rset_clear(allow, r); - if (ofs == sizeof(GCcdata)) break; - ofs -= 4; if (LJ_BE) ir++; else ir--; - } -#else - emit_tsi(as, MIPSI_SD, ra_alloc1(as, ir->op2, allow), - RID_RET, sizeof(GCcdata)); -#endif - lua_assert(sz == 4 || sz == 8); - } else if (ir->op2 != REF_NIL) { /* Create VLA/VLS/aligned cdata. */ - ci = &lj_ir_callinfo[IRCALL_lj_cdata_newv]; - args[0] = ASMREF_L; /* lua_State *L */ - args[1] = ir->op1; /* CTypeID id */ - args[2] = ir->op2; /* CTSize sz */ - args[3] = ASMREF_TMP1; /* CTSize align */ - asm_gencall(as, ci, args); - emit_loadi(as, ra_releasetmp(as, ASMREF_TMP1), (int32_t)ctype_align(info)); - return; - } - - /* Initialize gct and ctypeid. lj_mem_newgco() already sets marked. */ - emit_tsi(as, MIPSI_SB, RID_RET+1, RID_RET, offsetof(GCcdata, gct)); - emit_tsi(as, MIPSI_SH, RID_TMP, RID_RET, offsetof(GCcdata, ctypeid)); - emit_ti(as, MIPSI_LI, RID_RET+1, ~LJ_TCDATA); - emit_ti(as, MIPSI_LI, RID_TMP, id); /* Lower 16 bit used. Sign-ext ok. */ - args[0] = ASMREF_L; /* lua_State *L */ - args[1] = ASMREF_TMP1; /* MSize size */ - asm_gencall(as, ci, args); - ra_allockreg(as, (int32_t)(sz+sizeof(GCcdata)), - ra_releasetmp(as, ASMREF_TMP1)); -} -#else -#define asm_cnew(as, ir) ((void)0) -#endif - -/* -- Write barriers ------------------------------------------------------ */ - -static void asm_tbar(ASMState *as, IRIns *ir) -{ - Reg tab = ra_alloc1(as, ir->op1, RSET_GPR); - Reg mark = ra_scratch(as, rset_exclude(RSET_GPR, tab)); - Reg link = RID_TMP; - MCLabel l_end = emit_label(as); - emit_tsi(as, MIPSI_AS, link, tab, (int32_t)offsetof(GCtab, gclist)); - emit_tsi(as, MIPSI_SB, mark, tab, (int32_t)offsetof(GCtab, marked)); - emit_setgl(as, tab, gc.grayagain); - emit_getgl(as, link, gc.grayagain); - emit_dst(as, MIPSI_XOR, mark, mark, RID_TMP); /* Clear black bit. */ - emit_branch(as, MIPSI_BEQ, RID_TMP, RID_ZERO, l_end); - emit_tsi(as, MIPSI_ANDI, RID_TMP, mark, LJ_GC_BLACK); - emit_tsi(as, MIPSI_LBU, mark, tab, (int32_t)offsetof(GCtab, marked)); -} - -static void asm_obar(ASMState *as, IRIns *ir) -{ - const CCallInfo *ci = &lj_ir_callinfo[IRCALL_lj_gc_barrieruv]; - IRRef args[2]; - MCLabel l_end; - Reg obj, val, tmp; - /* No need for other object barriers (yet). */ - lua_assert(IR(ir->op1)->o == IR_UREFC); - ra_evictset(as, RSET_SCRATCH); - l_end = emit_label(as); - args[0] = ASMREF_TMP1; /* global_State *g */ - args[1] = ir->op1; /* TValue *tv */ - asm_gencall(as, ci, args); - emit_tsi(as, MIPSI_AADDIU, ra_releasetmp(as, ASMREF_TMP1), RID_JGL, -32768); - obj = IR(ir->op1)->r; - tmp = ra_scratch(as, rset_exclude(RSET_GPR, obj)); - emit_branch(as, MIPSI_BEQ, RID_TMP, RID_ZERO, l_end); - emit_tsi(as, MIPSI_ANDI, tmp, tmp, LJ_GC_BLACK); - emit_branch(as, MIPSI_BEQ, RID_TMP, RID_ZERO, l_end); - emit_tsi(as, MIPSI_ANDI, RID_TMP, RID_TMP, LJ_GC_WHITES); - val = ra_alloc1(as, ir->op2, rset_exclude(RSET_GPR, obj)); - emit_tsi(as, MIPSI_LBU, tmp, obj, - (int32_t)offsetof(GCupval, marked)-(int32_t)offsetof(GCupval, tv)); - emit_tsi(as, MIPSI_LBU, RID_TMP, val, (int32_t)offsetof(GChead, marked)); -} - -/* -- Arithmetic and logic operations ------------------------------------- */ - -#if !LJ_SOFTFP -static void asm_fparith(ASMState *as, IRIns *ir, MIPSIns mi) -{ - Reg dest = ra_dest(as, ir, RSET_FPR); - Reg right, left = ra_alloc2(as, ir, RSET_FPR); - right = (left >> 8); left &= 255; - emit_fgh(as, mi, dest, left, right); -} - -static void asm_fpunary(ASMState *as, IRIns *ir, MIPSIns mi) -{ - Reg dest = ra_dest(as, ir, RSET_FPR); - Reg left = ra_hintalloc(as, ir->op1, dest, RSET_FPR); - emit_fg(as, mi, dest, left); -} -#endif - -#if !LJ_SOFTFP32 -static void asm_fpmath(ASMState *as, IRIns *ir) -{ - if (ir->op2 == IRFPM_EXP2 && asm_fpjoin_pow(as, ir)) - return; -#if !LJ_SOFTFP - if (ir->op2 <= IRFPM_TRUNC) - asm_callround(as, ir, IRCALL_lj_vm_floor + ir->op2); - else if (ir->op2 == IRFPM_SQRT) - asm_fpunary(as, ir, MIPSI_SQRT_D); - else -#endif - asm_callid(as, ir, IRCALL_lj_vm_floor + ir->op2); -} -#endif - -#if !LJ_SOFTFP -#define asm_fpadd(as, ir) asm_fparith(as, ir, MIPSI_ADD_D) -#define asm_fpsub(as, ir) asm_fparith(as, ir, MIPSI_SUB_D) -#define asm_fpmul(as, ir) asm_fparith(as, ir, MIPSI_MUL_D) -#elif LJ_64 /* && LJ_SOFTFP */ -#define asm_fpadd(as, ir) asm_callid(as, ir, IRCALL_softfp_add) -#define asm_fpsub(as, ir) asm_callid(as, ir, IRCALL_softfp_sub) -#define asm_fpmul(as, ir) asm_callid(as, ir, IRCALL_softfp_mul) -#endif - -static void asm_add(ASMState *as, IRIns *ir) -{ - IRType1 t = ir->t; -#if !LJ_SOFTFP32 - if (irt_isnum(t)) { - asm_fpadd(as, ir); - } else -#endif - { - Reg dest = ra_dest(as, ir, RSET_GPR); - Reg right, left = ra_hintalloc(as, ir->op1, dest, RSET_GPR); - if (irref_isk(ir->op2)) { - intptr_t k = get_kval(IR(ir->op2)); - if (checki16(k)) { - emit_tsi(as, (LJ_64 && irt_is64(t)) ? MIPSI_DADDIU : MIPSI_ADDIU, dest, - left, k); - return; - } - } - right = ra_alloc1(as, ir->op2, rset_exclude(RSET_GPR, left)); - emit_dst(as, (LJ_64 && irt_is64(t)) ? MIPSI_DADDU : MIPSI_ADDU, dest, - left, right); - } -} - -static void asm_sub(ASMState *as, IRIns *ir) -{ -#if !LJ_SOFTFP32 - if (irt_isnum(ir->t)) { - asm_fpsub(as, ir); - } else -#endif - { - Reg dest = ra_dest(as, ir, RSET_GPR); - Reg right, left = ra_alloc2(as, ir, RSET_GPR); - right = (left >> 8); left &= 255; - emit_dst(as, (LJ_64 && irt_is64(ir->t)) ? MIPSI_DSUBU : MIPSI_SUBU, dest, - left, right); - } -} - -static void asm_mul(ASMState *as, IRIns *ir) -{ -#if !LJ_SOFTFP32 - if (irt_isnum(ir->t)) { - asm_fpmul(as, ir); - } else -#endif - { - Reg dest = ra_dest(as, ir, RSET_GPR); - Reg right, left = ra_alloc2(as, ir, RSET_GPR); - right = (left >> 8); left &= 255; - if (LJ_64 && irt_is64(ir->t)) { - emit_dst(as, MIPSI_MFLO, dest, 0, 0); - emit_dst(as, MIPSI_DMULT, 0, left, right); - } else { - emit_dst(as, MIPSI_MUL, dest, left, right); - } - } -} - -static void asm_mod(ASMState *as, IRIns *ir) -{ -#if LJ_64 && LJ_HASFFI - if (!irt_isint(ir->t)) - asm_callid(as, ir, irt_isi64(ir->t) ? IRCALL_lj_carith_modi64 : - IRCALL_lj_carith_modu64); - else -#endif - asm_callid(as, ir, IRCALL_lj_vm_modi); -} - -#if !LJ_SOFTFP32 -static void asm_pow(ASMState *as, IRIns *ir) -{ -#if LJ_64 && LJ_HASFFI - if (!irt_isnum(ir->t)) - asm_callid(as, ir, irt_isi64(ir->t) ? IRCALL_lj_carith_powi64 : - IRCALL_lj_carith_powu64); - else -#endif - asm_callid(as, ir, IRCALL_lj_vm_powi); -} - -static void asm_div(ASMState *as, IRIns *ir) -{ -#if LJ_64 && LJ_HASFFI - if (!irt_isnum(ir->t)) - asm_callid(as, ir, irt_isi64(ir->t) ? IRCALL_lj_carith_divi64 : - IRCALL_lj_carith_divu64); - else -#endif -#if !LJ_SOFTFP - asm_fparith(as, ir, MIPSI_DIV_D); -#else - asm_callid(as, ir, IRCALL_softfp_div); -#endif -} -#endif - -static void asm_neg(ASMState *as, IRIns *ir) -{ -#if !LJ_SOFTFP - if (irt_isnum(ir->t)) { - asm_fpunary(as, ir, MIPSI_NEG_D); - } else -#elif LJ_64 /* && LJ_SOFTFP */ - if (irt_isnum(ir->t)) { - Reg dest = ra_dest(as, ir, RSET_GPR); - Reg left = ra_hintalloc(as, ir->op1, dest, RSET_GPR); - emit_dst(as, MIPSI_XOR, dest, left, - ra_allock(as, 0x8000000000000000ll, rset_exclude(RSET_GPR, dest))); - } else -#endif - { - Reg dest = ra_dest(as, ir, RSET_GPR); - Reg left = ra_hintalloc(as, ir->op1, dest, RSET_GPR); - emit_dst(as, (LJ_64 && irt_is64(ir->t)) ? MIPSI_DSUBU : MIPSI_SUBU, dest, - RID_ZERO, left); - } -} - -#if !LJ_SOFTFP -#define asm_abs(as, ir) asm_fpunary(as, ir, MIPSI_ABS_D) -#elif LJ_64 /* && LJ_SOFTFP */ -static void asm_abs(ASMState *as, IRIns *ir) -{ - Reg dest = ra_dest(as, ir, RSET_GPR); - Reg left = ra_alloc1(as, ir->op1, RSET_GPR); - emit_tsml(as, MIPSI_DEXTM, dest, left, 30, 0); -} -#endif - -#define asm_atan2(as, ir) asm_callid(as, ir, IRCALL_atan2) -#define asm_ldexp(as, ir) asm_callid(as, ir, IRCALL_ldexp) - -static void asm_arithov(ASMState *as, IRIns *ir) -{ - Reg right, left, tmp, dest = ra_dest(as, ir, RSET_GPR); - lua_assert(!irt_is64(ir->t)); - if (irref_isk(ir->op2)) { - int k = IR(ir->op2)->i; - if (ir->o == IR_SUBOV) k = -k; - if (checki16(k)) { /* (dest < left) == (k >= 0 ? 1 : 0) */ - left = ra_alloc1(as, ir->op1, RSET_GPR); - asm_guard(as, k >= 0 ? MIPSI_BNE : MIPSI_BEQ, RID_TMP, RID_ZERO); - emit_dst(as, MIPSI_SLT, RID_TMP, dest, dest == left ? RID_TMP : left); - emit_tsi(as, MIPSI_ADDIU, dest, left, k); - if (dest == left) emit_move(as, RID_TMP, left); - return; - } - } - left = ra_alloc2(as, ir, RSET_GPR); - right = (left >> 8); left &= 255; - tmp = ra_scratch(as, rset_exclude(rset_exclude(rset_exclude(RSET_GPR, left), - right), dest)); - asm_guard(as, MIPSI_BLTZ, RID_TMP, 0); - emit_dst(as, MIPSI_AND, RID_TMP, RID_TMP, tmp); - if (ir->o == IR_ADDOV) { /* ((dest^left) & (dest^right)) < 0 */ - emit_dst(as, MIPSI_XOR, RID_TMP, dest, dest == right ? RID_TMP : right); - } else { /* ((dest^left) & (dest^~right)) < 0 */ - emit_dst(as, MIPSI_XOR, RID_TMP, RID_TMP, dest); - emit_dst(as, MIPSI_NOR, RID_TMP, dest == right ? RID_TMP : right, RID_ZERO); - } - emit_dst(as, MIPSI_XOR, tmp, dest, dest == left ? RID_TMP : left); - emit_dst(as, ir->o == IR_ADDOV ? MIPSI_ADDU : MIPSI_SUBU, dest, left, right); - if (dest == left || dest == right) - emit_move(as, RID_TMP, dest == left ? left : right); -} - -#define asm_addov(as, ir) asm_arithov(as, ir) -#define asm_subov(as, ir) asm_arithov(as, ir) - -static void asm_mulov(ASMState *as, IRIns *ir) -{ - Reg dest = ra_dest(as, ir, RSET_GPR); - Reg tmp, right, left = ra_alloc2(as, ir, RSET_GPR); - right = (left >> 8); left &= 255; - tmp = ra_scratch(as, rset_exclude(rset_exclude(rset_exclude(RSET_GPR, left), - right), dest)); - asm_guard(as, MIPSI_BNE, RID_TMP, tmp); - emit_dta(as, MIPSI_SRA, RID_TMP, dest, 31); - emit_dst(as, MIPSI_MFHI, tmp, 0, 0); - emit_dst(as, MIPSI_MFLO, dest, 0, 0); - emit_dst(as, MIPSI_MULT, 0, left, right); -} - -#if LJ_32 && LJ_HASFFI -static void asm_add64(ASMState *as, IRIns *ir) -{ - Reg dest = ra_dest(as, ir, RSET_GPR); - Reg right, left = ra_alloc1(as, ir->op1, RSET_GPR); - if (irref_isk(ir->op2)) { - int32_t k = IR(ir->op2)->i; - if (k == 0) { - emit_dst(as, MIPSI_ADDU, dest, left, RID_TMP); - goto loarith; - } else if (checki16(k)) { - emit_dst(as, MIPSI_ADDU, dest, dest, RID_TMP); - emit_tsi(as, MIPSI_ADDIU, dest, left, k); - goto loarith; - } - } - emit_dst(as, MIPSI_ADDU, dest, dest, RID_TMP); - right = ra_alloc1(as, ir->op2, rset_exclude(RSET_GPR, left)); - emit_dst(as, MIPSI_ADDU, dest, left, right); -loarith: - ir--; - dest = ra_dest(as, ir, RSET_GPR); - left = ra_alloc1(as, ir->op1, RSET_GPR); - if (irref_isk(ir->op2)) { - int32_t k = IR(ir->op2)->i; - if (k == 0) { - if (dest != left) - emit_move(as, dest, left); - return; - } else if (checki16(k)) { - if (dest == left) { - Reg tmp = ra_scratch(as, rset_exclude(RSET_GPR, left)); - emit_move(as, dest, tmp); - dest = tmp; - } - emit_dst(as, MIPSI_SLTU, RID_TMP, dest, left); - emit_tsi(as, MIPSI_ADDIU, dest, left, k); - return; - } - } - right = ra_alloc1(as, ir->op2, rset_exclude(RSET_GPR, left)); - if (dest == left && dest == right) { - Reg tmp = ra_scratch(as, rset_exclude(rset_exclude(RSET_GPR, left), right)); - emit_move(as, dest, tmp); - dest = tmp; - } - emit_dst(as, MIPSI_SLTU, RID_TMP, dest, dest == left ? right : left); - emit_dst(as, MIPSI_ADDU, dest, left, right); -} - -static void asm_sub64(ASMState *as, IRIns *ir) -{ - Reg dest = ra_dest(as, ir, RSET_GPR); - Reg right, left = ra_alloc2(as, ir, RSET_GPR); - right = (left >> 8); left &= 255; - emit_dst(as, MIPSI_SUBU, dest, dest, RID_TMP); - emit_dst(as, MIPSI_SUBU, dest, left, right); - ir--; - dest = ra_dest(as, ir, RSET_GPR); - left = ra_alloc2(as, ir, RSET_GPR); - right = (left >> 8); left &= 255; - if (dest == left) { - Reg tmp = ra_scratch(as, rset_exclude(rset_exclude(RSET_GPR, left), right)); - emit_move(as, dest, tmp); - dest = tmp; - } - emit_dst(as, MIPSI_SLTU, RID_TMP, left, dest); - emit_dst(as, MIPSI_SUBU, dest, left, right); -} - -static void asm_neg64(ASMState *as, IRIns *ir) -{ - Reg dest = ra_dest(as, ir, RSET_GPR); - Reg left = ra_alloc1(as, ir->op1, RSET_GPR); - emit_dst(as, MIPSI_SUBU, dest, dest, RID_TMP); - emit_dst(as, MIPSI_SUBU, dest, RID_ZERO, left); - ir--; - dest = ra_dest(as, ir, RSET_GPR); - left = ra_alloc1(as, ir->op1, RSET_GPR); - emit_dst(as, MIPSI_SLTU, RID_TMP, RID_ZERO, dest); - emit_dst(as, MIPSI_SUBU, dest, RID_ZERO, left); -} -#endif - -static void asm_bnot(ASMState *as, IRIns *ir) -{ - Reg left, right, dest = ra_dest(as, ir, RSET_GPR); - IRIns *irl = IR(ir->op1); - if (mayfuse(as, ir->op1) && irl->o == IR_BOR) { - left = ra_alloc2(as, irl, RSET_GPR); - right = (left >> 8); left &= 255; - } else { - left = ra_hintalloc(as, ir->op1, dest, RSET_GPR); - right = RID_ZERO; - } - emit_dst(as, MIPSI_NOR, dest, left, right); -} - -static void asm_bswap(ASMState *as, IRIns *ir) -{ - Reg dest = ra_dest(as, ir, RSET_GPR); - Reg left = ra_alloc1(as, ir->op1, RSET_GPR); -#if LJ_32 - if ((as->flags & JIT_F_MIPSXXR2)) { - emit_dta(as, MIPSI_ROTR, dest, RID_TMP, 16); - emit_dst(as, MIPSI_WSBH, RID_TMP, 0, left); - } else { - Reg tmp = ra_scratch(as, rset_exclude(rset_exclude(RSET_GPR, left), dest)); - emit_dst(as, MIPSI_OR, dest, dest, tmp); - emit_dst(as, MIPSI_OR, dest, dest, RID_TMP); - emit_tsi(as, MIPSI_ANDI, dest, dest, 0xff00); - emit_dta(as, MIPSI_SLL, RID_TMP, RID_TMP, 8); - emit_dta(as, MIPSI_SRL, dest, left, 8); - emit_tsi(as, MIPSI_ANDI, RID_TMP, left, 0xff00); - emit_dst(as, MIPSI_OR, tmp, tmp, RID_TMP); - emit_dta(as, MIPSI_SRL, tmp, left, 24); - emit_dta(as, MIPSI_SLL, RID_TMP, left, 24); - } -#else - if (irt_is64(ir->t)) { - emit_dst(as, MIPSI_DSHD, dest, 0, RID_TMP); - emit_dst(as, MIPSI_DSBH, RID_TMP, 0, left); - } else { - emit_dta(as, MIPSI_ROTR, dest, RID_TMP, 16); - emit_dst(as, MIPSI_WSBH, RID_TMP, 0, left); - } -#endif -} - -static void asm_bitop(ASMState *as, IRIns *ir, MIPSIns mi, MIPSIns mik) -{ - Reg dest = ra_dest(as, ir, RSET_GPR); - Reg right, left = ra_hintalloc(as, ir->op1, dest, RSET_GPR); - if (irref_isk(ir->op2)) { - intptr_t k = get_kval(IR(ir->op2)); - if (checku16(k)) { - emit_tsi(as, mik, dest, left, k); - return; - } - } - right = ra_alloc1(as, ir->op2, rset_exclude(RSET_GPR, left)); - emit_dst(as, mi, dest, left, right); -} - -#define asm_band(as, ir) asm_bitop(as, ir, MIPSI_AND, MIPSI_ANDI) -#define asm_bor(as, ir) asm_bitop(as, ir, MIPSI_OR, MIPSI_ORI) -#define asm_bxor(as, ir) asm_bitop(as, ir, MIPSI_XOR, MIPSI_XORI) - -static void asm_bitshift(ASMState *as, IRIns *ir, MIPSIns mi, MIPSIns mik) -{ - Reg dest = ra_dest(as, ir, RSET_GPR); - if (irref_isk(ir->op2)) { /* Constant shifts. */ - uint32_t shift = (uint32_t)IR(ir->op2)->i; - if (LJ_64 && irt_is64(ir->t)) mik |= (shift & 32) ? MIPSI_D32 : MIPSI_D; - emit_dta(as, mik, dest, ra_hintalloc(as, ir->op1, dest, RSET_GPR), - (shift & 31)); - } else { - Reg right, left = ra_alloc2(as, ir, RSET_GPR); - right = (left >> 8); left &= 255; - if (LJ_64 && irt_is64(ir->t)) mi |= MIPSI_DV; - emit_dst(as, mi, dest, right, left); /* Shift amount is in rs. */ - } -} - -#define asm_bshl(as, ir) asm_bitshift(as, ir, MIPSI_SLLV, MIPSI_SLL) -#define asm_bshr(as, ir) asm_bitshift(as, ir, MIPSI_SRLV, MIPSI_SRL) -#define asm_bsar(as, ir) asm_bitshift(as, ir, MIPSI_SRAV, MIPSI_SRA) -#define asm_brol(as, ir) lua_assert(0) - -static void asm_bror(ASMState *as, IRIns *ir) -{ - if (LJ_64 || (as->flags & JIT_F_MIPSXXR2)) { - asm_bitshift(as, ir, MIPSI_ROTRV, MIPSI_ROTR); - } else { - Reg dest = ra_dest(as, ir, RSET_GPR); - if (irref_isk(ir->op2)) { /* Constant shifts. */ - uint32_t shift = (uint32_t)(IR(ir->op2)->i & 31); - Reg left = ra_hintalloc(as, ir->op1, dest, RSET_GPR); - emit_rotr(as, dest, left, RID_TMP, shift); - } else { - Reg right, left = ra_alloc2(as, ir, RSET_GPR); - right = (left >> 8); left &= 255; - emit_dst(as, MIPSI_OR, dest, dest, RID_TMP); - emit_dst(as, MIPSI_SRLV, dest, right, left); - emit_dst(as, MIPSI_SLLV, RID_TMP, RID_TMP, left); - emit_dst(as, MIPSI_SUBU, RID_TMP, ra_allock(as, 32, RSET_GPR), right); - } - } -} - -#if LJ_SOFTFP -static void asm_sfpmin_max(ASMState *as, IRIns *ir) -{ - CCallInfo ci = lj_ir_callinfo[(IROp)ir->o == IR_MIN ? IRCALL_lj_vm_sfmin : IRCALL_lj_vm_sfmax]; -#if LJ_64 - IRRef args[2]; - args[0] = ir->op1; - args[1] = ir->op2; -#else - IRRef args[4]; - args[0^LJ_BE] = ir->op1; - args[1^LJ_BE] = (ir+1)->op1; - args[2^LJ_BE] = ir->op2; - args[3^LJ_BE] = (ir+1)->op2; -#endif - asm_setupresult(as, ir, &ci); - emit_call(as, (void *)ci.func, 0); - ci.func = NULL; - asm_gencall(as, &ci, args); -} -#endif - -static void asm_min_max(ASMState *as, IRIns *ir, int ismax) -{ - if (!LJ_SOFTFP32 && irt_isnum(ir->t)) { -#if LJ_SOFTFP - asm_sfpmin_max(as, ir); -#else - Reg dest = ra_dest(as, ir, RSET_FPR); - Reg right, left = ra_alloc2(as, ir, RSET_FPR); - right = (left >> 8); left &= 255; - if (dest == left) { - emit_fg(as, MIPSI_MOVT_D, dest, right); - } else { - emit_fg(as, MIPSI_MOVF_D, dest, left); - if (dest != right) emit_fg(as, MIPSI_MOV_D, dest, right); - } - emit_fgh(as, MIPSI_C_OLT_D, 0, ismax ? left : right, ismax ? right : left); -#endif - } else { - Reg dest = ra_dest(as, ir, RSET_GPR); - Reg right, left = ra_alloc2(as, ir, RSET_GPR); - right = (left >> 8); left &= 255; - if (dest == left) { - emit_dst(as, MIPSI_MOVN, dest, right, RID_TMP); - } else { - emit_dst(as, MIPSI_MOVZ, dest, left, RID_TMP); - if (dest != right) emit_move(as, dest, right); - } - emit_dst(as, MIPSI_SLT, RID_TMP, - ismax ? left : right, ismax ? right : left); - } -} - -#define asm_min(as, ir) asm_min_max(as, ir, 0) -#define asm_max(as, ir) asm_min_max(as, ir, 1) - -/* -- Comparisons --------------------------------------------------------- */ - -#if LJ_SOFTFP -/* SFP comparisons. */ -static void asm_sfpcomp(ASMState *as, IRIns *ir) -{ - const CCallInfo *ci = &lj_ir_callinfo[IRCALL_softfp_cmp]; - RegSet drop = RSET_SCRATCH; - Reg r; -#if LJ_64 - IRRef args[2]; - args[0] = ir->op1; - args[1] = ir->op2; -#else - IRRef args[4]; - args[LJ_LE ? 0 : 1] = ir->op1; args[LJ_LE ? 1 : 0] = (ir+1)->op1; - args[LJ_LE ? 2 : 3] = ir->op2; args[LJ_LE ? 3 : 2] = (ir+1)->op2; -#endif - - for (r = REGARG_FIRSTGPR; r <= REGARG_FIRSTGPR+(LJ_64?1:3); r++) { - if (!rset_test(as->freeset, r) && - regcost_ref(as->cost[r]) == args[r-REGARG_FIRSTGPR]) - rset_clear(drop, r); - } - ra_evictset(as, drop); - - asm_setupresult(as, ir, ci); - - switch ((IROp)ir->o) { - case IR_LT: - asm_guard(as, MIPSI_BGEZ, RID_RET, 0); - break; - case IR_ULT: - asm_guard(as, MIPSI_BEQ, RID_RET, RID_TMP); - emit_loadi(as, RID_TMP, 1); - asm_guard(as, MIPSI_BEQ, RID_RET, RID_ZERO); - break; - case IR_GE: - asm_guard(as, MIPSI_BEQ, RID_RET, RID_TMP); - emit_loadi(as, RID_TMP, 2); - asm_guard(as, MIPSI_BLTZ, RID_RET, 0); - break; - case IR_LE: - asm_guard(as, MIPSI_BGTZ, RID_RET, 0); - break; - case IR_GT: - asm_guard(as, MIPSI_BEQ, RID_RET, RID_TMP); - emit_loadi(as, RID_TMP, 2); - asm_guard(as, MIPSI_BLEZ, RID_RET, 0); - break; - case IR_UGE: - asm_guard(as, MIPSI_BLTZ, RID_RET, 0); - break; - case IR_ULE: - asm_guard(as, MIPSI_BEQ, RID_RET, RID_TMP); - emit_loadi(as, RID_TMP, 1); - break; - case IR_UGT: case IR_ABC: - asm_guard(as, MIPSI_BLEZ, RID_RET, 0); - break; - case IR_EQ: case IR_NE: - asm_guard(as, (ir->o & 1) ? MIPSI_BEQ : MIPSI_BNE, RID_RET, RID_ZERO); - default: - break; - } - asm_gencall(as, ci, args); -} -#endif - -static void asm_comp(ASMState *as, IRIns *ir) -{ - /* ORDER IR: LT GE LE GT ULT UGE ULE UGT. */ - IROp op = ir->o; - if (!LJ_SOFTFP32 && irt_isnum(ir->t)) { -#if LJ_SOFTFP - asm_sfpcomp(as, ir); -#else - Reg right, left = ra_alloc2(as, ir, RSET_FPR); - right = (left >> 8); left &= 255; - asm_guard(as, (op&1) ? MIPSI_BC1T : MIPSI_BC1F, 0, 0); - emit_fgh(as, MIPSI_C_OLT_D + ((op&3) ^ ((op>>2)&1)), 0, left, right); -#endif - } else { - Reg right, left = ra_alloc1(as, ir->op1, RSET_GPR); - if (op == IR_ABC) op = IR_UGT; - if ((op&4) == 0 && irref_isk(ir->op2) && get_kval(IR(ir->op2)) == 0) { - MIPSIns mi = (op&2) ? ((op&1) ? MIPSI_BLEZ : MIPSI_BGTZ) : - ((op&1) ? MIPSI_BLTZ : MIPSI_BGEZ); - asm_guard(as, mi, left, 0); - } else { - if (irref_isk(ir->op2)) { - intptr_t k = get_kval(IR(ir->op2)); - if ((op&2)) k++; - if (checki16(k)) { - asm_guard(as, (op&1) ? MIPSI_BNE : MIPSI_BEQ, RID_TMP, RID_ZERO); - emit_tsi(as, (op&4) ? MIPSI_SLTIU : MIPSI_SLTI, - RID_TMP, left, k); - return; - } - } - right = ra_alloc1(as, ir->op2, rset_exclude(RSET_GPR, left)); - asm_guard(as, ((op^(op>>1))&1) ? MIPSI_BNE : MIPSI_BEQ, RID_TMP, RID_ZERO); - emit_dst(as, (op&4) ? MIPSI_SLTU : MIPSI_SLT, - RID_TMP, (op&2) ? right : left, (op&2) ? left : right); - } - } -} - -static void asm_equal(ASMState *as, IRIns *ir) -{ - Reg right, left = ra_alloc2(as, ir, (!LJ_SOFTFP && irt_isnum(ir->t)) ? - RSET_FPR : RSET_GPR); - right = (left >> 8); left &= 255; - if (!LJ_SOFTFP32 && irt_isnum(ir->t)) { -#if LJ_SOFTFP - asm_sfpcomp(as, ir); -#else - asm_guard(as, (ir->o & 1) ? MIPSI_BC1T : MIPSI_BC1F, 0, 0); - emit_fgh(as, MIPSI_C_EQ_D, 0, left, right); -#endif - } else { - asm_guard(as, (ir->o & 1) ? MIPSI_BEQ : MIPSI_BNE, left, right); - } -} - -#if LJ_32 && LJ_HASFFI -/* 64 bit integer comparisons. */ -static void asm_comp64(ASMState *as, IRIns *ir) -{ - /* ORDER IR: LT GE LE GT ULT UGE ULE UGT. */ - IROp op = (ir-1)->o; - MCLabel l_end; - Reg rightlo, leftlo, righthi, lefthi = ra_alloc2(as, ir, RSET_GPR); - righthi = (lefthi >> 8); lefthi &= 255; - leftlo = ra_alloc2(as, ir-1, - rset_exclude(rset_exclude(RSET_GPR, lefthi), righthi)); - rightlo = (leftlo >> 8); leftlo &= 255; - asm_guard(as, ((op^(op>>1))&1) ? MIPSI_BNE : MIPSI_BEQ, RID_TMP, RID_ZERO); - l_end = emit_label(as); - if (lefthi != righthi) - emit_dst(as, (op&4) ? MIPSI_SLTU : MIPSI_SLT, RID_TMP, - (op&2) ? righthi : lefthi, (op&2) ? lefthi : righthi); - emit_dst(as, MIPSI_SLTU, RID_TMP, - (op&2) ? rightlo : leftlo, (op&2) ? leftlo : rightlo); - if (lefthi != righthi) - emit_branch(as, MIPSI_BEQ, lefthi, righthi, l_end); -} - -static void asm_comp64eq(ASMState *as, IRIns *ir) -{ - Reg tmp, right, left = ra_alloc2(as, ir, RSET_GPR); - right = (left >> 8); left &= 255; - asm_guard(as, ((ir-1)->o & 1) ? MIPSI_BEQ : MIPSI_BNE, RID_TMP, RID_ZERO); - tmp = ra_scratch(as, rset_exclude(rset_exclude(RSET_GPR, left), right)); - emit_dst(as, MIPSI_OR, RID_TMP, RID_TMP, tmp); - emit_dst(as, MIPSI_XOR, tmp, left, right); - left = ra_alloc2(as, ir-1, RSET_GPR); - right = (left >> 8); left &= 255; - emit_dst(as, MIPSI_XOR, RID_TMP, left, right); -} -#endif - -/* -- Support for 64 bit ops in 32 bit mode ------------------------------- */ - -/* Hiword op of a split 64 bit op. Previous op must be the loword op. */ -static void asm_hiop(ASMState *as, IRIns *ir) -{ -#if LJ_32 && (LJ_HASFFI || LJ_SOFTFP) - /* HIOP is marked as a store because it needs its own DCE logic. */ - int uselo = ra_used(ir-1), usehi = ra_used(ir); /* Loword/hiword used? */ - if (LJ_UNLIKELY(!(as->flags & JIT_F_OPT_DCE))) uselo = usehi = 1; - if ((ir-1)->o == IR_CONV) { /* Conversions to/from 64 bit. */ - as->curins--; /* Always skip the CONV. */ -#if LJ_HASFFI && !LJ_SOFTFP - if (usehi || uselo) - asm_conv64(as, ir); - return; -#endif - } else if ((ir-1)->o < IR_EQ) { /* 64 bit integer comparisons. ORDER IR. */ - as->curins--; /* Always skip the loword comparison. */ -#if LJ_SOFTFP - if (!irt_isint(ir->t)) { - asm_sfpcomp(as, ir-1); - return; - } -#endif -#if LJ_HASFFI - asm_comp64(as, ir); -#endif - return; - } else if ((ir-1)->o <= IR_NE) { /* 64 bit integer comparisons. ORDER IR. */ - as->curins--; /* Always skip the loword comparison. */ -#if LJ_SOFTFP - if (!irt_isint(ir->t)) { - asm_sfpcomp(as, ir-1); - return; - } -#endif -#if LJ_HASFFI - asm_comp64eq(as, ir); -#endif - return; -#if LJ_SOFTFP - } else if ((ir-1)->o == IR_MIN || (ir-1)->o == IR_MAX) { - as->curins--; /* Always skip the loword min/max. */ - if (uselo || usehi) - asm_sfpmin_max(as, ir-1); - return; -#endif - } else if ((ir-1)->o == IR_XSTORE) { - as->curins--; /* Handle both stores here. */ - if ((ir-1)->r != RID_SINK) { - asm_xstore_(as, ir, LJ_LE ? 4 : 0); - asm_xstore_(as, ir-1, LJ_LE ? 0 : 4); - } - return; - } - if (!usehi) return; /* Skip unused hiword op for all remaining ops. */ - switch ((ir-1)->o) { -#if LJ_HASFFI - case IR_ADD: as->curins--; asm_add64(as, ir); break; - case IR_SUB: as->curins--; asm_sub64(as, ir); break; - case IR_NEG: as->curins--; asm_neg64(as, ir); break; -#endif -#if LJ_SOFTFP - case IR_SLOAD: case IR_ALOAD: case IR_HLOAD: case IR_ULOAD: case IR_VLOAD: - case IR_STRTO: - if (!uselo) - ra_allocref(as, ir->op1, RSET_GPR); /* Mark lo op as used. */ - break; -#endif - case IR_CALLN: - case IR_CALLS: - case IR_CALLXS: - if (!uselo) - ra_allocref(as, ir->op1, RID2RSET(RID_RETLO)); /* Mark lo op as used. */ - break; -#if LJ_SOFTFP - case IR_ASTORE: case IR_HSTORE: case IR_USTORE: case IR_TOSTR: -#endif - case IR_CNEWI: - /* Nothing to do here. Handled by lo op itself. */ - break; - default: lua_assert(0); break; - } -#else - UNUSED(as); UNUSED(ir); lua_assert(0); /* Unused without FFI. */ -#endif -} - -/* -- Profiling ----------------------------------------------------------- */ - -static void asm_prof(ASMState *as, IRIns *ir) -{ - UNUSED(ir); - asm_guard(as, MIPSI_BNE, RID_TMP, RID_ZERO); - emit_tsi(as, MIPSI_ANDI, RID_TMP, RID_TMP, HOOK_PROFILE); - emit_lsglptr(as, MIPSI_LBU, RID_TMP, - (int32_t)offsetof(global_State, hookmask)); -} - -/* -- Stack handling ------------------------------------------------------ */ - -/* Check Lua stack size for overflow. Use exit handler as fallback. */ -static void asm_stack_check(ASMState *as, BCReg topslot, - IRIns *irp, RegSet allow, ExitNo exitno) -{ - /* Try to get an unused temp. register, otherwise spill/restore RID_RET*. */ - Reg tmp, pbase = irp ? (ra_hasreg(irp->r) ? irp->r : RID_TMP) : RID_BASE; - ExitNo oldsnap = as->snapno; - rset_clear(allow, pbase); -#if LJ_32 - tmp = allow ? rset_pickbot(allow) : - (pbase == RID_RETHI ? RID_RETLO : RID_RETHI); -#else - tmp = allow ? rset_pickbot(allow) : RID_RET; -#endif - as->snapno = exitno; - asm_guard(as, MIPSI_BNE, RID_TMP, RID_ZERO); - as->snapno = oldsnap; - if (allow == RSET_EMPTY) /* Restore temp. register. */ - emit_tsi(as, MIPSI_AL, tmp, RID_SP, 0); - else - ra_modified(as, tmp); - emit_tsi(as, MIPSI_SLTIU, RID_TMP, RID_TMP, (int32_t)(8*topslot)); - emit_dst(as, MIPSI_ASUBU, RID_TMP, tmp, pbase); - emit_tsi(as, MIPSI_AL, tmp, tmp, offsetof(lua_State, maxstack)); - if (pbase == RID_TMP) - emit_getgl(as, RID_TMP, jit_base); - emit_getgl(as, tmp, cur_L); - if (allow == RSET_EMPTY) /* Spill temp. register. */ - emit_tsi(as, MIPSI_AS, tmp, RID_SP, 0); -} - -/* Restore Lua stack from on-trace state. */ -static void asm_stack_restore(ASMState *as, SnapShot *snap) -{ - SnapEntry *map = &as->T->snapmap[snap->mapofs]; -#if LJ_32 || defined(LUA_USE_ASSERT) - SnapEntry *flinks = &as->T->snapmap[snap_nextofs(as->T, snap)-1-LJ_FR2]; -#endif - MSize n, nent = snap->nent; - /* Store the value of all modified slots to the Lua stack. */ - for (n = 0; n < nent; n++) { - SnapEntry sn = map[n]; - BCReg s = snap_slot(sn); - int32_t ofs = 8*((int32_t)s-1-LJ_FR2); - IRRef ref = snap_ref(sn); - IRIns *ir = IR(ref); - if ((sn & SNAP_NORESTORE)) - continue; - if (irt_isnum(ir->t)) { -#if LJ_SOFTFP32 - Reg tmp; - RegSet allow = rset_exclude(RSET_GPR, RID_BASE); - lua_assert(irref_isk(ref)); /* LJ_SOFTFP: must be a number constant. */ - tmp = ra_allock(as, (int32_t)ir_knum(ir)->u32.lo, allow); - emit_tsi(as, MIPSI_SW, tmp, RID_BASE, ofs+(LJ_BE?4:0)); - if (rset_test(as->freeset, tmp+1)) allow = RID2RSET(tmp+1); - tmp = ra_allock(as, (int32_t)ir_knum(ir)->u32.hi, allow); - emit_tsi(as, MIPSI_SW, tmp, RID_BASE, ofs+(LJ_BE?0:4)); -#elif LJ_SOFTFP /* && LJ_64 */ - Reg src = ra_alloc1(as, ref, rset_exclude(RSET_GPR, RID_BASE)); - emit_tsi(as, MIPSI_SD, src, RID_BASE, ofs); -#else - Reg src = ra_alloc1(as, ref, RSET_FPR); - emit_hsi(as, MIPSI_SDC1, src, RID_BASE, ofs); -#endif - } else { -#if LJ_32 - RegSet allow = rset_exclude(RSET_GPR, RID_BASE); - Reg type; - lua_assert(irt_ispri(ir->t) || irt_isaddr(ir->t) || irt_isinteger(ir->t)); - if (!irt_ispri(ir->t)) { - Reg src = ra_alloc1(as, ref, allow); - rset_clear(allow, src); - emit_tsi(as, MIPSI_SW, src, RID_BASE, ofs+(LJ_BE?4:0)); - } - if ((sn & (SNAP_CONT|SNAP_FRAME))) { - if (s == 0) continue; /* Do not overwrite link to previous frame. */ - type = ra_allock(as, (int32_t)(*flinks--), allow); -#if LJ_SOFTFP - } else if ((sn & SNAP_SOFTFPNUM)) { - type = ra_alloc1(as, ref+1, rset_exclude(RSET_GPR, RID_BASE)); -#endif - } else { - type = ra_allock(as, (int32_t)irt_toitype(ir->t), allow); - } - emit_tsi(as, MIPSI_SW, type, RID_BASE, ofs+(LJ_BE?0:4)); -#else - asm_tvstore64(as, RID_BASE, ofs, ref); -#endif - } - checkmclim(as); - } - lua_assert(map + nent == flinks); -} - -/* -- GC handling --------------------------------------------------------- */ - -/* Check GC threshold and do one or more GC steps. */ -static void asm_gc_check(ASMState *as) -{ - const CCallInfo *ci = &lj_ir_callinfo[IRCALL_lj_gc_step_jit]; - IRRef args[2]; - MCLabel l_end; - Reg tmp; - ra_evictset(as, RSET_SCRATCH); - l_end = emit_label(as); - /* Exit trace if in GCSatomic or GCSfinalize. Avoids syncing GC objects. */ - /* Assumes asm_snap_prep() already done. */ - asm_guard(as, MIPSI_BNE, RID_RET, RID_ZERO); - args[0] = ASMREF_TMP1; /* global_State *g */ - args[1] = ASMREF_TMP2; /* MSize steps */ - asm_gencall(as, ci, args); - emit_tsi(as, MIPSI_AADDIU, ra_releasetmp(as, ASMREF_TMP1), RID_JGL, -32768); - tmp = ra_releasetmp(as, ASMREF_TMP2); - emit_loadi(as, tmp, as->gcsteps); - /* Jump around GC step if GC total < GC threshold. */ - emit_branch(as, MIPSI_BNE, RID_TMP, RID_ZERO, l_end); - emit_dst(as, MIPSI_SLTU, RID_TMP, RID_TMP, tmp); - emit_getgl(as, tmp, gc.threshold); - emit_getgl(as, RID_TMP, gc.total); - as->gcsteps = 0; - checkmclim(as); -} - -/* -- Loop handling ------------------------------------------------------- */ - -/* Fixup the loop branch. */ -static void asm_loop_fixup(ASMState *as) -{ - MCode *p = as->mctop; - MCode *target = as->mcp; - p[-1] = MIPSI_NOP; - if (as->loopinv) { /* Inverted loop branch? */ - /* asm_guard already inverted the cond branch. Only patch the target. */ - p[-3] |= ((target-p+2) & 0x0000ffffu); - } else { - p[-2] = MIPSI_J|(((uintptr_t)target>>2)&0x03ffffffu); - } -} - -/* -- Head of trace ------------------------------------------------------- */ - -/* Coalesce BASE register for a root trace. */ -static void asm_head_root_base(ASMState *as) -{ - IRIns *ir = IR(REF_BASE); - Reg r = ir->r; - if (as->loopinv) as->mctop--; - if (ra_hasreg(r)) { - ra_free(as, r); - if (rset_test(as->modset, r) || irt_ismarked(ir->t)) - ir->r = RID_INIT; /* No inheritance for modified BASE register. */ - if (r != RID_BASE) - emit_move(as, r, RID_BASE); - } -} - -/* Coalesce BASE register for a side trace. */ -static RegSet asm_head_side_base(ASMState *as, IRIns *irp, RegSet allow) -{ - IRIns *ir = IR(REF_BASE); - Reg r = ir->r; - if (as->loopinv) as->mctop--; - if (ra_hasreg(r)) { - ra_free(as, r); - if (rset_test(as->modset, r) || irt_ismarked(ir->t)) - ir->r = RID_INIT; /* No inheritance for modified BASE register. */ - if (irp->r == r) { - rset_clear(allow, r); /* Mark same BASE register as coalesced. */ - } else if (ra_hasreg(irp->r) && rset_test(as->freeset, irp->r)) { - rset_clear(allow, irp->r); - emit_move(as, r, irp->r); /* Move from coalesced parent reg. */ - } else { - emit_getgl(as, r, jit_base); /* Otherwise reload BASE. */ - } - } - return allow; -} - -/* -- Tail of trace ------------------------------------------------------- */ - -/* Fixup the tail code. */ -static void asm_tail_fixup(ASMState *as, TraceNo lnk) -{ - MCode *target = lnk ? traceref(as->J,lnk)->mcode : (MCode *)lj_vm_exit_interp; - int32_t spadj = as->T->spadjust; - MCode *p = as->mctop-1; - *p = spadj ? (MIPSI_AADDIU|MIPSF_T(RID_SP)|MIPSF_S(RID_SP)|spadj) : MIPSI_NOP; - p[-1] = MIPSI_J|(((uintptr_t)target>>2)&0x03ffffffu); -} - -/* Prepare tail of code. */ -static void asm_tail_prep(ASMState *as) -{ - as->mcp = as->mctop-2; /* Leave room for branch plus nop or stack adj. */ - as->invmcp = as->loopref ? as->mcp : NULL; -} - -/* -- Trace setup --------------------------------------------------------- */ - -/* Ensure there are enough stack slots for call arguments. */ -static Reg asm_setup_call_slots(ASMState *as, IRIns *ir, const CCallInfo *ci) -{ - IRRef args[CCI_NARGS_MAX*2]; - uint32_t i, nargs = CCI_XNARGS(ci); -#if LJ_32 - int nslots = 4, ngpr = REGARG_NUMGPR, nfpr = REGARG_NUMFPR; -#else - int nslots = 0, ngpr = REGARG_NUMGPR; -#endif - asm_collectargs(as, ir, ci, args); - for (i = 0; i < nargs; i++) { -#if LJ_32 - if (!LJ_SOFTFP && args[i] && irt_isfp(IR(args[i])->t) && - nfpr > 0 && !(ci->flags & CCI_VARARG)) { - nfpr--; - ngpr -= irt_isnum(IR(args[i])->t) ? 2 : 1; - } else if (!LJ_SOFTFP && args[i] && irt_isnum(IR(args[i])->t)) { - nfpr = 0; - ngpr = ngpr & ~1; - if (ngpr > 0) ngpr -= 2; else nslots = (nslots+3) & ~1; - } else { - nfpr = 0; - if (ngpr > 0) ngpr--; else nslots++; - } -#else - if (ngpr > 0) ngpr--; else nslots += 2; -#endif - } - if (nslots > as->evenspill) /* Leave room for args in stack slots. */ - as->evenspill = nslots; - return irt_isfp(ir->t) ? REGSP_HINT(RID_FPRET) : REGSP_HINT(RID_RET); -} - -static void asm_setup_target(ASMState *as) -{ - asm_sparejump_setup(as); - asm_exitstub_setup(as); -} - -/* -- Trace patching ------------------------------------------------------ */ - -/* Patch exit jumps of existing machine code to a new target. */ -void lj_asm_patchexit(jit_State *J, GCtrace *T, ExitNo exitno, MCode *target) -{ - MCode *p = T->mcode; - MCode *pe = (MCode *)((char *)p + T->szmcode); - MCode *px = exitstub_trace_addr(T, exitno); - MCode *cstart = NULL, *cstop = NULL; - MCode *mcarea = lj_mcode_patch(J, p, 0); - MCode exitload = MIPSI_LI | MIPSF_T(RID_TMP) | exitno; - MCode tjump = MIPSI_J|(((uintptr_t)target>>2)&0x03ffffffu); - for (p++; p < pe; p++) { - if (*p == exitload) { /* Look for load of exit number. */ - /* Look for exitstub branch. Yes, this covers all used branch variants. */ - if (((p[-1] ^ (px-p)) & 0xffffu) == 0 && - ((p[-1] & 0xf0000000u) == MIPSI_BEQ || - (p[-1] & 0xfc1e0000u) == MIPSI_BLTZ || - (p[-1] & 0xffe00000u) == MIPSI_BC1F)) { - ptrdiff_t delta = target - p; - if (((delta + 0x8000) >> 16) == 0) { /* Patch in-range branch. */ - patchbranch: - p[-1] = (p[-1] & 0xffff0000u) | (delta & 0xffffu); - *p = MIPSI_NOP; /* Replace the load of the exit number. */ - cstop = p; - if (!cstart) cstart = p-1; - } else { /* Branch out of range. Use spare jump slot in mcarea. */ - int i; - for (i = (int)(sizeof(MCLink)/sizeof(MCode)); - i < (int)(sizeof(MCLink)/sizeof(MCode)+MIPS_SPAREJUMP*2); - i += 2) { - if (mcarea[i] == tjump) { - delta = mcarea+i - p; - goto patchbranch; - } else if (mcarea[i] == MIPSI_NOP) { - mcarea[i] = tjump; - cstart = mcarea+i; - delta = mcarea+i - p; - goto patchbranch; - } - } - /* Ignore jump slot overflow. Child trace is simply not attached. */ - } - } else if (p+1 == pe) { - /* Patch NOP after code for inverted loop branch. Use of J is ok. */ - lua_assert(p[1] == MIPSI_NOP); - p[1] = tjump; - *p = MIPSI_NOP; /* Replace the load of the exit number. */ - cstop = p+2; - if (!cstart) cstart = p+1; - } - } - } - if (cstart) lj_mcode_sync(cstart, cstop); - lj_mcode_patch(J, mcarea, 1); -} - |