aboutsummaryrefslogtreecommitdiffstats
path: root/lib/LuaJIT/src/lj_asm_arm64.h
diff options
context:
space:
mode:
Diffstat (limited to 'lib/LuaJIT/src/lj_asm_arm64.h')
-rw-r--r--lib/LuaJIT/src/lj_asm_arm64.h2031
1 files changed, 0 insertions, 2031 deletions
diff --git a/lib/LuaJIT/src/lj_asm_arm64.h b/lib/LuaJIT/src/lj_asm_arm64.h
deleted file mode 100644
index baafa21..0000000
--- a/lib/LuaJIT/src/lj_asm_arm64.h
+++ /dev/null
@@ -1,2031 +0,0 @@
-/*
-** ARM64 IR assembler (SSA IR -> machine code).
-** Copyright (C) 2005-2017 Mike Pall. See Copyright Notice in luajit.h
-**
-** Contributed by Djordje Kovacevic and Stefan Pejic from RT-RK.com.
-** Sponsored by Cisco Systems, Inc.
-*/
-
-/* -- 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 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_allocref(as, ir->op2, rset_exclude(allow, left));
- else
- ra_noweak(as, right);
- } else if (ra_hasreg(right)) {
- ra_noweak(as, right);
- left = ra_allocref(as, ir->op1, rset_exclude(allow, right));
- } else if (ra_hashint(right)) {
- right = ra_allocref(as, ir->op2, allow);
- left = ra_alloc1(as, ir->op1, rset_exclude(allow, right));
- } else {
- left = ra_allocref(as, ir->op1, allow);
- right = ra_alloc1(as, ir->op2, rset_exclude(allow, left));
- }
- return left | (right << 8);
-}
-
-/* -- Guard handling ------------------------------------------------------ */
-
-/* Setup all needed exit stubs. */
-static void asm_exitstub_setup(ASMState *as, ExitNo nexits)
-{
- ExitNo i;
- MCode *mxp = as->mctop;
- if (mxp - (nexits + 3 + MCLIM_REDZONE) < as->mclim)
- asm_mclimit(as);
- /* 1: str lr,[sp]; bl ->vm_exit_handler; movz w0,traceno; bl <1; bl <1; ... */
- for (i = nexits-1; (int32_t)i >= 0; i--)
- *--mxp = A64I_LE(A64I_BL | A64F_S26(-3-i));
- *--mxp = A64I_LE(A64I_MOVZw | A64F_U16(as->T->traceno));
- mxp--;
- *mxp = A64I_LE(A64I_BL | A64F_S26(((MCode *)(void *)lj_vm_exit_handler-mxp)));
- *--mxp = A64I_LE(A64I_STRx | A64F_D(RID_LR) | A64F_N(RID_SP));
- as->mctop = mxp;
-}
-
-static MCode *asm_exitstub_addr(ASMState *as, ExitNo exitno)
-{
- /* Keep this in-sync with exitstub_trace_addr(). */
- return as->mctop + exitno + 3;
-}
-
-/* Emit conditional branch to exit for guard. */
-static void asm_guardcc(ASMState *as, A64CC cc)
-{
- MCode *target = asm_exitstub_addr(as, as->snapno);
- MCode *p = as->mcp;
- if (LJ_UNLIKELY(p == as->invmcp)) {
- as->loopinv = 1;
- *p = A64I_B | A64F_S26(target-p);
- emit_cond_branch(as, cc^1, p-1);
- return;
- }
- emit_cond_branch(as, cc, target);
-}
-
-/* Emit test and branch instruction to exit for guard. */
-static void asm_guardtnb(ASMState *as, A64Ins ai, Reg r, uint32_t bit)
-{
- MCode *target = asm_exitstub_addr(as, as->snapno);
- MCode *p = as->mcp;
- if (LJ_UNLIKELY(p == as->invmcp)) {
- as->loopinv = 1;
- *p = A64I_B | A64F_S26(target-p);
- emit_tnb(as, ai^0x01000000u, r, bit, p-1);
- return;
- }
- emit_tnb(as, ai, r, bit, target);
-}
-
-/* Emit compare and branch instruction to exit for guard. */
-static void asm_guardcnb(ASMState *as, A64Ins ai, Reg r)
-{
- MCode *target = asm_exitstub_addr(as, as->snapno);
- MCode *p = as->mcp;
- if (LJ_UNLIKELY(p == as->invmcp)) {
- as->loopinv = 1;
- *p = A64I_B | A64F_S26(target-p);
- emit_cnb(as, ai^0x01000000u, r, p-1);
- return;
- }
- emit_cnb(as, ai, r, target);
-}
-
-/* -- Operand fusion ------------------------------------------------------ */
-
-/* Limit linear search to this distance. Avoids O(n^2) behavior. */
-#define CONFLICT_SEARCH_LIM 31
-
-static int asm_isk32(ASMState *as, IRRef ref, int32_t *k)
-{
- if (irref_isk(ref)) {
- IRIns *ir = IR(ref);
- if (ir->o == IR_KNULL || !irt_is64(ir->t)) {
- *k = ir->i;
- return 1;
- } else if (checki32((int64_t)ir_k64(ir)->u64)) {
- *k = (int32_t)ir_k64(ir)->u64;
- return 1;
- }
- }
- return 0;
-}
-
-/* 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;
-}
-
-#define FUSE_REG 0x40000000
-
-/* Fuse array/hash/upvalue reference into register+offset operand. */
-static Reg asm_fuseahuref(ASMState *as, IRRef ref, int32_t *ofsp, RegSet allow,
- A64Ins ins)
-{
- 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 (emit_checkofs(ins, ofs)) {
- *ofsp = ofs;
- return ra_alloc1(as, refa, allow);
- }
- } else {
- Reg base = ra_alloc1(as, ir->op1, allow);
- *ofsp = FUSE_REG|ra_alloc1(as, ir->op2, rset_exclude(allow, base));
- return base;
- }
- }
- } else if (ir->o == IR_HREFK) {
- if (mayfuse(as, ref)) {
- int32_t ofs = (int32_t)(IR(ir->op2)->op2 * sizeof(Node));
- if (emit_checkofs(ins, 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));
- GCupval *uv = &gcref(fn->l.uvptr[(ir->op2 >> 8)])->uv;
- int64_t ofs = glofs(as, &uv->tv);
- if (emit_checkofs(ins, ofs)) {
- *ofsp = (int32_t)ofs;
- return RID_GL;
- }
- }
- }
- }
- *ofsp = 0;
- return ra_alloc1(as, ref, allow);
-}
-
-/* Fuse m operand into arithmetic/logic instructions. */
-static uint32_t asm_fuseopm(ASMState *as, A64Ins ai, IRRef ref, RegSet allow)
-{
- IRIns *ir = IR(ref);
- if (ra_hasreg(ir->r)) {
- ra_noweak(as, ir->r);
- return A64F_M(ir->r);
- } else if (irref_isk(ref)) {
- uint32_t m;
- int64_t k = get_k64val(ir);
- if ((ai & 0x1f000000) == 0x0a000000)
- m = emit_isk13(k, irt_is64(ir->t));
- else
- m = emit_isk12(k);
- if (m)
- return m;
- } else if (mayfuse(as, ref)) {
- if ((ir->o >= IR_BSHL && ir->o <= IR_BSAR && irref_isk(ir->op2)) ||
- (ir->o == IR_ADD && ir->op1 == ir->op2)) {
- A64Shift sh = ir->o == IR_BSHR ? A64SH_LSR :
- ir->o == IR_BSAR ? A64SH_ASR : A64SH_LSL;
- int shift = ir->o == IR_ADD ? 1 :
- (IR(ir->op2)->i & (irt_is64(ir->t) ? 63 : 31));
- IRIns *irl = IR(ir->op1);
- if (sh == A64SH_LSL &&
- irl->o == IR_CONV &&
- irl->op2 == ((IRT_I64<<IRCONV_DSH)|IRT_INT|IRCONV_SEXT) &&
- shift <= 4 &&
- canfuse(as, irl)) {
- Reg m = ra_alloc1(as, irl->op1, allow);
- return A64F_M(m) | A64F_EXSH(A64EX_SXTW, shift);
- } else {
- Reg m = ra_alloc1(as, ir->op1, allow);
- return A64F_M(m) | A64F_SH(sh, shift);
- }
- } else if (ir->o == IR_CONV &&
- ir->op2 == ((IRT_I64<<IRCONV_DSH)|IRT_INT|IRCONV_SEXT)) {
- Reg m = ra_alloc1(as, ir->op1, allow);
- return A64F_M(m) | A64F_EX(A64EX_SXTW);
- }
- }
- return A64F_M(ra_allocref(as, ref, allow));
-}
-
-/* Fuse XLOAD/XSTORE reference into load/store operand. */
-static void asm_fusexref(ASMState *as, A64Ins ai, Reg rd, IRRef ref,
- RegSet allow)
-{
- IRIns *ir = IR(ref);
- Reg base;
- int32_t ofs = 0;
- if (ra_noreg(ir->r) && canfuse(as, ir)) {
- if (ir->o == IR_ADD) {
- if (asm_isk32(as, ir->op2, &ofs) && emit_checkofs(ai, ofs)) {
- ref = ir->op1;
- } else {
- Reg rn, rm;
- IRRef lref = ir->op1, rref = ir->op2;
- IRIns *irl = IR(lref);
- if (mayfuse(as, irl->op1)) {
- unsigned int shift = 4;
- if (irl->o == IR_BSHL && irref_isk(irl->op2)) {
- shift = (IR(irl->op2)->i & 63);
- } else if (irl->o == IR_ADD && irl->op1 == irl->op2) {
- shift = 1;
- }
- if ((ai >> 30) == shift) {
- lref = irl->op1;
- irl = IR(lref);
- ai |= A64I_LS_SH;
- }
- }
- if (irl->o == IR_CONV &&
- irl->op2 == ((IRT_I64<<IRCONV_DSH)|IRT_INT|IRCONV_SEXT) &&
- canfuse(as, irl)) {
- lref = irl->op1;
- ai |= A64I_LS_SXTWx;
- } else {
- ai |= A64I_LS_LSLx;
- }
- rm = ra_alloc1(as, lref, allow);
- rn = ra_alloc1(as, rref, rset_exclude(allow, rm));
- emit_dnm(as, (ai^A64I_LS_R), (rd & 31), rn, rm);
- return;
- }
- } else if (ir->o == IR_STRREF) {
- if (asm_isk32(as, ir->op2, &ofs)) {
- ref = ir->op1;
- } else if (asm_isk32(as, ir->op1, &ofs)) {
- ref = ir->op2;
- } else {
- Reg rn = ra_alloc1(as, ir->op1, allow);
- IRIns *irr = IR(ir->op2);
- uint32_t m;
- if (irr+1 == ir && !ra_used(irr) &&
- irr->o == IR_ADD && irref_isk(irr->op2)) {
- ofs = sizeof(GCstr) + IR(irr->op2)->i;
- if (emit_checkofs(ai, ofs)) {
- Reg rm = ra_alloc1(as, irr->op1, rset_exclude(allow, rn));
- m = A64F_M(rm) | A64F_EX(A64EX_SXTW);
- goto skipopm;
- }
- }
- m = asm_fuseopm(as, 0, ir->op2, rset_exclude(allow, rn));
- ofs = sizeof(GCstr);
- skipopm:
- emit_lso(as, ai, rd, rd, ofs);
- emit_dn(as, A64I_ADDx^m, rd, rn);
- return;
- }
- ofs += sizeof(GCstr);
- if (!emit_checkofs(ai, ofs)) {
- Reg rn = ra_alloc1(as, ref, allow);
- Reg rm = ra_allock(as, ofs, rset_exclude(allow, rn));
- emit_dnm(as, (ai^A64I_LS_R)|A64I_LS_UXTWx, rd, rn, rm);
- return;
- }
- }
- }
- base = ra_alloc1(as, ref, allow);
- emit_lso(as, ai, (rd & 31), base, ofs);
-}
-
-/* Fuse FP multiply-add/sub. */
-static int asm_fusemadd(ASMState *as, IRIns *ir, A64Ins ai, A64Ins air)
-{
- IRRef lref = ir->op1, rref = ir->op2;
- IRIns *irm;
- if (lref != rref &&
- ((mayfuse(as, lref) && (irm = IR(lref), irm->o == IR_MUL) &&
- ra_noreg(irm->r)) ||
- (mayfuse(as, rref) && (irm = IR(rref), irm->o == IR_MUL) &&
- (rref = lref, ai = air, ra_noreg(irm->r))))) {
- Reg dest = ra_dest(as, ir, RSET_FPR);
- Reg add = ra_hintalloc(as, rref, dest, RSET_FPR);
- Reg left = ra_alloc2(as, irm,
- rset_exclude(rset_exclude(RSET_FPR, dest), add));
- Reg right = (left >> 8); left &= 255;
- emit_dnma(as, ai, (dest & 31), (left & 31), (right & 31), (add & 31));
- return 1;
- }
- return 0;
-}
-
-/* Fuse BAND + BSHL/BSHR into UBFM. */
-static int asm_fuseandshift(ASMState *as, IRIns *ir)
-{
- IRIns *irl = IR(ir->op1);
- lua_assert(ir->o == IR_BAND);
- if (canfuse(as, irl) && irref_isk(ir->op2)) {
- uint64_t mask = get_k64val(IR(ir->op2));
- if (irref_isk(irl->op2) && (irl->o == IR_BSHR || irl->o == IR_BSHL)) {
- int32_t shmask = irt_is64(irl->t) ? 63 : 31;
- int32_t shift = (IR(irl->op2)->i & shmask);
- int32_t imms = shift;
- if (irl->o == IR_BSHL) {
- mask >>= shift;
- shift = (shmask-shift+1) & shmask;
- imms = 0;
- }
- if (mask && !((mask+1) & mask)) { /* Contiguous 1-bits at the bottom. */
- Reg dest = ra_dest(as, ir, RSET_GPR);
- Reg left = ra_alloc1(as, irl->op1, RSET_GPR);
- A64Ins ai = shmask == 63 ? A64I_UBFMx : A64I_UBFMw;
- imms += 63 - emit_clz64(mask);
- if (imms > shmask) imms = shmask;
- emit_dn(as, ai | A64F_IMMS(imms) | A64F_IMMR(shift), dest, left);
- return 1;
- }
- }
- }
- return 0;
-}
-
-/* Fuse BOR(BSHL, BSHR) into EXTR/ROR. */
-static int asm_fuseorshift(ASMState *as, IRIns *ir)
-{
- IRIns *irl = IR(ir->op1), *irr = IR(ir->op2);
- lua_assert(ir->o == IR_BOR);
- if (canfuse(as, irl) && canfuse(as, irr) &&
- ((irl->o == IR_BSHR && irr->o == IR_BSHL) ||
- (irl->o == IR_BSHL && irr->o == IR_BSHR))) {
- if (irref_isk(irl->op2) && irref_isk(irr->op2)) {
- IRRef lref = irl->op1, rref = irr->op1;
- uint32_t lshift = IR(irl->op2)->i, rshift = IR(irr->op2)->i;
- if (irl->o == IR_BSHR) { /* BSHR needs to be the right operand. */
- uint32_t tmp2;
- IRRef tmp1 = lref; lref = rref; rref = tmp1;
- tmp2 = lshift; lshift = rshift; rshift = tmp2;
- }
- if (rshift + lshift == (irt_is64(ir->t) ? 64 : 32)) {
- A64Ins ai = irt_is64(ir->t) ? A64I_EXTRx : A64I_EXTRw;
- Reg dest = ra_dest(as, ir, RSET_GPR);
- Reg left = ra_alloc1(as, lref, RSET_GPR);
- Reg right = ra_alloc1(as, rref, rset_exclude(RSET_GPR, left));
- emit_dnm(as, ai | A64F_IMMS(rshift), dest, left, right);
- return 1;
- }
- }
- }
- return 0;
-}
-
-/* -- 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 = 0;
- Reg gpr, fpr = REGARG_FIRSTFPR;
- if ((void *)ci->func)
- emit_call(as, (void *)ci->func);
- for (gpr = REGARG_FIRSTGPR; gpr <= REGARG_LASTGPR; gpr++)
- as->cost[gpr] = REGCOST(~0u, ASMREF_L);
- gpr = REGARG_FIRSTGPR;
- for (n = 0; n < nargs; n++) { /* Setup args. */
- IRRef ref = args[n];
- IRIns *ir = IR(ref);
- if (ref) {
- if (irt_isfp(ir->t)) {
- if (fpr <= REGARG_LASTFPR) {
- lua_assert(rset_test(as->freeset, fpr)); /* Must have been evicted. */
- ra_leftov(as, fpr, ref);
- fpr++;
- } else {
- Reg r = ra_alloc1(as, ref, RSET_FPR);
- emit_spstore(as, ir, r, ofs + ((LJ_BE && !irt_isnum(ir->t)) ? 4 : 0));
- ofs += 8;
- }
- } else {
- if (gpr <= REGARG_LASTGPR) {
- lua_assert(rset_test(as->freeset, gpr)); /* Must have been evicted. */
- ra_leftov(as, gpr, ref);
- gpr++;
- } else {
- Reg r = ra_alloc1(as, ref, RSET_GPR);
- emit_spstore(as, ir, r, ofs + ((LJ_BE && !irt_is64(ir->t)) ? 4 : 0));
- ofs += 8;
- }
- }
- }
- }
-}
-
-/* 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 (ra_hasreg(ir->r))
- rset_clear(drop, ir->r); /* Dest reg handled below. */
- ra_evictset(as, drop); /* Evictions must be performed first. */
- if (ra_used(ir)) {
- lua_assert(!irt_ispri(ir->t));
- if (irt_isfp(ir->t)) {
- if (ci->flags & CCI_CASTU64) {
- Reg dest = ra_dest(as, ir, RSET_FPR) & 31;
- emit_dn(as, irt_isnum(ir->t) ? A64I_FMOV_D_R : A64I_FMOV_S_R,
- dest, RID_RET);
- } else {
- ra_destreg(as, ir, RID_FPRET);
- }
- } else {
- ra_destreg(as, ir, RID_RET);
- }
- }
- UNUSED(ci);
-}
-
-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)(ir_k64(irf)->u64);
- } else { /* Need a non-argument register for indirect calls. */
- Reg freg = ra_alloc1(as, func, RSET_RANGE(RID_X8, RID_MAX_GPR)-RSET_FIXED);
- emit_n(as, A64I_BLR, freg);
- ci.func = (ASMFunction)(void *)0;
- }
- asm_gencall(as, &ci, args);
-}
-
-/* -- 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. */
- /* Need to force a spill on REF_BASE now to update the stack slot. */
- emit_lso(as, A64I_STRx, base, RID_SP, ra_spill(as, IR(REF_BASE)));
- emit_setgl(as, base, jit_base);
- emit_addptr(as, base, -8*delta);
- asm_guardcc(as, CC_NE);
- emit_nm(as, A64I_CMPx, RID_TMP,
- ra_allock(as, i64ptr(pc), rset_exclude(RSET_GPR, base)));
- emit_lso(as, A64I_LDRx, RID_TMP, base, -8);
-}
-
-/* -- Type conversions ---------------------------------------------------- */
-
-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_guardcc(as, CC_NE);
- emit_nm(as, A64I_FCMPd, (tmp & 31), (left & 31));
- emit_dn(as, A64I_FCVT_F64_S32, (tmp & 31), dest);
- emit_dn(as, A64I_FCVT_S32_F64, dest, (left & 31));
-}
-
-static void asm_tobit(ASMState *as, IRIns *ir)
-{
- RegSet allow = RSET_FPR;
- 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));
- Reg dest = ra_dest(as, ir, RSET_GPR);
- emit_dn(as, A64I_FMOV_R_S, dest, (tmp & 31));
- emit_dnm(as, A64I_FADDd, (tmp & 31), (left & 31), (right & 31));
-}
-
-static void asm_conv(ASMState *as, IRIns *ir)
-{
- IRType st = (IRType)(ir->op2 & IRCONV_SRCMASK);
- int st64 = (st == IRT_I64 || st == IRT_U64 || st == IRT_P64);
- int stfp = (st == IRT_NUM || st == IRT_FLOAT);
- IRRef lref = ir->op1;
- lua_assert(irt_type(ir->t) != st);
- if (irt_isfp(ir->t)) {
- Reg dest = ra_dest(as, ir, RSET_FPR);
- if (stfp) { /* FP to FP conversion. */
- emit_dn(as, st == IRT_NUM ? A64I_FCVT_F32_F64 : A64I_FCVT_F64_F32,
- (dest & 31), (ra_alloc1(as, lref, RSET_FPR) & 31));
- } else { /* Integer to FP conversion. */
- Reg left = ra_alloc1(as, lref, RSET_GPR);
- A64Ins ai = irt_isfloat(ir->t) ?
- (((IRT_IS64 >> st) & 1) ?
- (st == IRT_I64 ? A64I_FCVT_F32_S64 : A64I_FCVT_F32_U64) :
- (st == IRT_INT ? A64I_FCVT_F32_S32 : A64I_FCVT_F32_U32)) :
- (((IRT_IS64 >> st) & 1) ?
- (st == IRT_I64 ? A64I_FCVT_F64_S64 : A64I_FCVT_F64_U64) :
- (st == IRT_INT ? A64I_FCVT_F64_S32 : A64I_FCVT_F64_U32));
- emit_dn(as, ai, (dest & 31), left);
- }
- } 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 left = ra_alloc1(as, lref, RSET_FPR);
- Reg dest = ra_dest(as, ir, RSET_GPR);
- A64Ins ai = irt_is64(ir->t) ?
- (st == IRT_NUM ?
- (irt_isi64(ir->t) ? A64I_FCVT_S64_F64 : A64I_FCVT_U64_F64) :
- (irt_isi64(ir->t) ? A64I_FCVT_S64_F32 : A64I_FCVT_U64_F32)) :
- (st == IRT_NUM ?
- (irt_isint(ir->t) ? A64I_FCVT_S32_F64 : A64I_FCVT_U32_F64) :
- (irt_isint(ir->t) ? A64I_FCVT_S32_F32 : A64I_FCVT_U32_F32));
- emit_dn(as, ai, dest, (left & 31));
- }
- } else if (st >= IRT_I8 && st <= IRT_U16) { /* Extend to 32 bit integer. */
- Reg dest = ra_dest(as, ir, RSET_GPR);
- Reg left = ra_alloc1(as, lref, RSET_GPR);
- A64Ins ai = st == IRT_I8 ? A64I_SXTBw :
- st == IRT_U8 ? A64I_UXTBw :
- st == IRT_I16 ? A64I_SXTHw : A64I_UXTHw;
- lua_assert(irt_isint(ir->t) || irt_isu32(ir->t));
- emit_dn(as, ai, dest, left);
- } else {
- Reg dest = ra_dest(as, ir, RSET_GPR);
- if (irt_is64(ir->t)) {
- if (st64 || !(ir->op2 & IRCONV_SEXT)) {
- /* 64/64 bit no-op (cast) or 32 to 64 bit zero extension. */
- ra_leftov(as, dest, lref); /* Do nothing, but may need to move regs. */
- } else { /* 32 to 64 bit sign extension. */
- Reg left = ra_alloc1(as, lref, RSET_GPR);
- emit_dn(as, A64I_SXTW, dest, left);
- }
- } 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_dm(as, A64I_MOVw, dest, left);
- } else { /* 32/32 bit no-op (cast). */
- ra_leftov(as, dest, lref); /* Do nothing, but may need to move regs. */
- }
- }
- }
-}
-
-static void asm_strto(ASMState *as, IRIns *ir)
-{
- const CCallInfo *ci = &lj_ir_callinfo[IRCALL_lj_strscan_num];
- IRRef args[2];
- Reg dest = 0, tmp;
- int destused = ra_used(ir);
- int32_t ofs = 0;
- ra_evictset(as, RSET_SCRATCH);
- if (destused) {
- if (ra_hasspill(ir->s)) {
- ofs = sps_scale(ir->s);
- destused = 0;
- if (ra_hasreg(ir->r)) {
- ra_free(as, ir->r);
- ra_modified(as, ir->r);
- emit_spload(as, ir, ir->r, ofs);
- }
- } else {
- dest = ra_dest(as, ir, RSET_FPR);
- }
- }
- if (destused)
- emit_lso(as, A64I_LDRd, (dest & 31), RID_SP, 0);
- asm_guardcnb(as, A64I_CBZ, RID_RET);
- args[0] = ir->op1; /* GCstr *str */
- args[1] = ASMREF_TMP1; /* TValue *n */
- asm_gencall(as, ci, args);
- tmp = ra_releasetmp(as, ASMREF_TMP1);
- emit_opk(as, A64I_ADDx, tmp, RID_SP, ofs, RSET_GPR);
-}
-
-/* -- Memory references --------------------------------------------------- */
-
-/* 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_lso(as, A64I_STRx, ra_allock(as, k.u64, allow), base, ofs);
- } else {
- Reg src = ra_alloc1(as, ref, allow);
- rset_clear(allow, src);
- if (irt_isinteger(ir->t)) {
- Reg type = ra_allock(as, (int64_t)irt_toitype(ir->t) << 47, allow);
- emit_lso(as, A64I_STRx, RID_TMP, base, ofs);
- emit_dnm(as, A64I_ADDx | A64F_EX(A64EX_UXTW), RID_TMP, type, src);
- } else {
- Reg type = ra_allock(as, (int32_t)irt_toitype(ir->t), allow);
- emit_lso(as, A64I_STRx, RID_TMP, base, ofs);
- emit_dnm(as, A64I_ADDx | A64F_SH(A64SH_LSL, 47), RID_TMP, src, type);
- }
- }
-}
-
-/* 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, i64ptr(ir_knum(ir)), dest);
- } else {
- /* Otherwise force a spill and use the spill slot. */
- emit_opk(as, A64I_ADDx, dest, RID_SP, ra_spill(as, ir), RSET_GPR);
- }
- } else {
- /* Otherwise use g->tmptv to hold the TValue. */
- asm_tvstore64(as, dest, 0, ref);
- ra_allockreg(as, i64ptr(&J2G(as->J)->tmptv), dest);
- }
-}
-
-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;
- uint32_t k = emit_isk12(ofs + 8*IR(ir->op2)->i);
- if (k) {
- base = ra_alloc1(as, refa, RSET_GPR);
- emit_dn(as, A64I_ADDx^k, dest, base);
- return;
- }
- }
- base = ra_alloc1(as, ir->op1, RSET_GPR);
- idx = ra_alloc1(as, ir->op2, rset_exclude(RSET_GPR, base));
- emit_dnm(as, A64I_ADDx | A64F_EXSH(A64EX_UXTW, 3), dest, base, idx);
-}
-
-/* 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 = 0, tmp = RID_TMP;
- IRRef refkey = ir->op2;
- IRIns *irkey = IR(refkey);
- int isk = irref_isk(ir->op2);
- IRType1 kt = irkey->t;
- uint32_t k = 0;
- uint32_t khash;
- MCLabel l_end, l_loop, l_next;
- rset_clear(allow, tab);
-
- if (!isk) {
- key = ra_alloc1(as, ir->op2, irt_isnum(kt) ? RSET_FPR : allow);
- rset_clear(allow, key);
- if (!irt_isstr(kt)) {
- tmp = ra_scratch(as, allow);
- rset_clear(allow, tmp);
- }
- } else if (irt_isnum(kt)) {
- int64_t val = (int64_t)ir_knum(irkey)->u64;
- if (!(k = emit_isk12(val))) {
- key = ra_allock(as, val, allow);
- rset_clear(allow, key);
- }
- } else if (!irt_ispri(kt)) {
- if (!(k = emit_isk12(irkey->i))) {
- key = ra_alloc1(as, refkey, allow);
- rset_clear(allow, key);
- }
- }
-
- /* 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_guardcc(as, CC_AL);
- else if (destused)
- emit_loada(as, dest, niltvg(J2G(as->J)));
-
- /* Follow hash chain until the end. */
- l_loop = --as->mcp;
- emit_n(as, A64I_CMPx^A64I_K12^0, dest);
- emit_lso(as, A64I_LDRx, dest, dest, offsetof(Node, next));
- l_next = emit_label(as);
-
- /* Type and value comparison. */
- if (merge == IR_EQ)
- asm_guardcc(as, CC_EQ);
- else
- emit_cond_branch(as, CC_EQ, l_end);
-
- if (irt_isnum(kt)) {
- if (isk) {
- /* Assumes -0.0 is already canonicalized to +0.0. */
- if (k)
- emit_n(as, A64I_CMPx^k, tmp);
- else
- emit_nm(as, A64I_CMPx, key, tmp);
- emit_lso(as, A64I_LDRx, tmp, dest, offsetof(Node, key.u64));
- } else {
- Reg tisnum = ra_allock(as, LJ_TISNUM << 15, allow);
- Reg ftmp = ra_scratch(as, rset_exclude(RSET_FPR, key));
- rset_clear(allow, tisnum);
- emit_nm(as, A64I_FCMPd, key, ftmp);
- emit_dn(as, A64I_FMOV_D_R, (ftmp & 31), (tmp & 31));
- emit_cond_branch(as, CC_LO, l_next);
- emit_nm(as, A64I_CMPx | A64F_SH(A64SH_LSR, 32), tisnum, tmp);
- emit_lso(as, A64I_LDRx, tmp, dest, offsetof(Node, key.n));
- }
- } else if (irt_isaddr(kt)) {
- Reg scr;
- if (isk) {
- int64_t kk = ((int64_t)irt_toitype(irkey->t) << 47) | irkey[1].tv.u64;
- scr = ra_allock(as, kk, allow);
- emit_nm(as, A64I_CMPx, scr, tmp);
- emit_lso(as, A64I_LDRx, tmp, dest, offsetof(Node, key.u64));
- } else {
- scr = ra_scratch(as, allow);
- emit_nm(as, A64I_CMPx, tmp, scr);
- emit_lso(as, A64I_LDRx, scr, dest, offsetof(Node, key.u64));
- }
- rset_clear(allow, scr);
- } else {
- Reg type, scr;
- lua_assert(irt_ispri(kt) && !irt_isnil(kt));
- type = ra_allock(as, ~((int64_t)~irt_toitype(ir->t) << 47), allow);
- scr = ra_scratch(as, rset_clear(allow, type));
- rset_clear(allow, scr);
- emit_nm(as, A64I_CMPw, scr, type);
- emit_lso(as, A64I_LDRx, scr, dest, offsetof(Node, key));
- }
-
- *l_loop = A64I_BCC | A64F_S19(as->mcp - l_loop) | CC_NE;
- if (!isk && irt_isaddr(kt)) {
- Reg type = ra_allock(as, (int32_t)irt_toitype(kt), allow);
- emit_dnm(as, A64I_ADDx | A64F_SH(A64SH_LSL, 47), tmp, key, type);
- rset_clear(allow, type);
- }
- /* Load main position relative to tab->node into dest. */
- khash = isk ? ir_khash(irkey) : 1;
- if (khash == 0) {
- emit_lso(as, A64I_LDRx, dest, tab, offsetof(GCtab, node));
- } else {
- emit_dnm(as, A64I_ADDx | A64F_SH(A64SH_LSL, 3), dest, tmp, dest);
- emit_dnm(as, A64I_ADDx | A64F_SH(A64SH_LSL, 1), dest, dest, dest);
- emit_lso(as, A64I_LDRx, tmp, tab, offsetof(GCtab, node));
- if (isk) {
- Reg tmphash = ra_allock(as, khash, allow);
- emit_dnm(as, A64I_ANDw, dest, dest, tmphash);
- emit_lso(as, A64I_LDRw, dest, tab, offsetof(GCtab, hmask));
- } else if (irt_isstr(kt)) {
- /* Fetch of str->hash is cheaper than ra_allock. */
- emit_dnm(as, A64I_ANDw, dest, dest, tmp);
- emit_lso(as, A64I_LDRw, tmp, key, offsetof(GCstr, hash));
- emit_lso(as, A64I_LDRw, dest, tab, offsetof(GCtab, hmask));
- } else { /* Must match with hash*() in lj_tab.c. */
- emit_dnm(as, A64I_ANDw, dest, dest, tmp);
- emit_lso(as, A64I_LDRw, tmp, tab, offsetof(GCtab, hmask));
- emit_dnm(as, A64I_SUBw, dest, dest, tmp);
- emit_dnm(as, A64I_EXTRw | (A64F_IMMS(32-HASH_ROT3)), tmp, tmp, tmp);
- emit_dnm(as, A64I_EORw, dest, dest, tmp);
- emit_dnm(as, A64I_EXTRw | (A64F_IMMS(32-HASH_ROT2)), dest, dest, dest);
- emit_dnm(as, A64I_SUBw, tmp, tmp, dest);
- emit_dnm(as, A64I_EXTRw | (A64F_IMMS(32-HASH_ROT1)), dest, dest, dest);
- emit_dnm(as, A64I_EORw, tmp, tmp, dest);
- if (irt_isnum(kt)) {
- emit_dnm(as, A64I_ADDw, dest, dest, dest);
- emit_dn(as, A64I_LSRx | A64F_IMMR(32)|A64F_IMMS(32), dest, dest);
- emit_dm(as, A64I_MOVw, tmp, dest);
- emit_dn(as, A64I_FMOV_R_D, dest, (key & 31));
- } else {
- checkmclim(as);
- emit_dm(as, A64I_MOVw, tmp, key);
- emit_dnm(as, A64I_EORw, dest, dest,
- ra_allock(as, irt_toitype(kt) << 15, allow));
- emit_dn(as, A64I_LSRx | A64F_IMMR(32)|A64F_IMMS(32), dest, dest);
- emit_dm(as, A64I_MOVx, dest, key);
- }
- }
- }
-}
-
-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);
- int bigofs = !emit_checkofs(A64I_LDRx, ofs);
- Reg dest = (ra_used(ir) || bigofs) ? ra_dest(as, ir, RSET_GPR) : RID_NONE;
- Reg node = ra_alloc1(as, ir->op1, RSET_GPR);
- Reg key, idx = node;
- RegSet allow = rset_exclude(RSET_GPR, node);
- uint64_t k;
- lua_assert(ofs % sizeof(Node) == 0);
- if (bigofs) {
- idx = dest;
- rset_clear(allow, dest);
- kofs = (int32_t)offsetof(Node, key);
- } else if (ra_hasreg(dest)) {
- emit_opk(as, A64I_ADDx, dest, node, ofs, allow);
- }
- asm_guardcc(as, CC_NE);
- if (irt_ispri(irkey->t)) {
- k = ~((int64_t)~irt_toitype(irkey->t) << 47);
- } else if (irt_isnum(irkey->t)) {
- k = ir_knum(irkey)->u64;
- } else {
- k = ((uint64_t)irt_toitype(irkey->t) << 47) | (uint64_t)ir_kgc(irkey);
- }
- key = ra_scratch(as, allow);
- emit_nm(as, A64I_CMPx, key, ra_allock(as, k, rset_exclude(allow, key)));
- emit_lso(as, A64I_LDRx, key, idx, kofs);
- if (bigofs)
- emit_opk(as, A64I_ADDx, dest, node, ofs, RSET_GPR);
-}
-
-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, A64I_LDRx, dest, v);
- } else {
- Reg uv = ra_scratch(as, RSET_GPR);
- Reg func = ra_alloc1(as, ir->op1, RSET_GPR);
- if (ir->o == IR_UREFC) {
- asm_guardcc(as, CC_NE);
- emit_n(as, (A64I_CMPx^A64I_K12) | A64F_U12(1), RID_TMP);
- emit_opk(as, A64I_ADDx, dest, uv,
- (int32_t)offsetof(GCupval, tv), RSET_GPR);
- emit_lso(as, A64I_LDRB, RID_TMP, uv, (int32_t)offsetof(GCupval, closed));
- } else {
- emit_lso(as, A64I_LDRx, dest, uv, (int32_t)offsetof(GCupval, v));
- }
- emit_lso(as, A64I_LDRx, uv, func,
- (int32_t)offsetof(GCfuncL, uvptr) + 8*(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)
-{
- 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);
- uint32_t m;
- rset_clear(allow, base);
- if (irref_isk(ir->op2) && (m = emit_isk12(ofs + irr->i))) {
- emit_dn(as, A64I_ADDx^m, dest, base);
- } else {
- emit_dn(as, (A64I_ADDx^A64I_K12) | A64F_U12(ofs), dest, dest);
- emit_dnm(as, A64I_ADDx, dest, base, ra_alloc1(as, ir->op2, allow));
- }
-}
-
-/* -- Loads and stores ---------------------------------------------------- */
-
-static A64Ins asm_fxloadins(IRIns *ir)
-{
- switch (irt_type(ir->t)) {
- case IRT_I8: return A64I_LDRB ^ A64I_LS_S;
- case IRT_U8: return A64I_LDRB;
- case IRT_I16: return A64I_LDRH ^ A64I_LS_S;
- case IRT_U16: return A64I_LDRH;
- case IRT_NUM: return A64I_LDRd;
- case IRT_FLOAT: return A64I_LDRs;
- default: return irt_is64(ir->t) ? A64I_LDRx : A64I_LDRw;
- }
-}
-
-static A64Ins asm_fxstoreins(IRIns *ir)
-{
- switch (irt_type(ir->t)) {
- case IRT_I8: case IRT_U8: return A64I_STRB;
- case IRT_I16: case IRT_U16: return A64I_STRH;
- case IRT_NUM: return A64I_STRd;
- case IRT_FLOAT: return A64I_STRs;
- default: return irt_is64(ir->t) ? A64I_STRx : A64I_STRw;
- }
-}
-
-static void asm_fload(ASMState *as, IRIns *ir)
-{
- Reg dest = ra_dest(as, ir, RSET_GPR);
- Reg idx;
- A64Ins ai = asm_fxloadins(ir);
- int32_t ofs;
- if (ir->op1 == REF_NIL) {
- idx = RID_GL;
- ofs = (ir->op2 << 2) - 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_dn(as, (A64I_ADDx^A64I_K12) | A64F_U12(ofs), dest, idx);
- return;
- }
- }
- ofs = field_ofs[ir->op2];
- }
- emit_lso(as, ai, (dest & 31), idx, ofs);
-}
-
-static void asm_fstore(ASMState *as, IRIns *ir)
-{
- if (ir->r != RID_SINK) {
- Reg src = ra_alloc1(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];
- emit_lso(as, asm_fxstoreins(ir), (src & 31), idx, ofs);
- }
-}
-
-static void asm_xload(ASMState *as, IRIns *ir)
-{
- Reg dest = ra_dest(as, ir, 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);
-}
-
-static void asm_xstore(ASMState *as, IRIns *ir)
-{
- if (ir->r != RID_SINK) {
- Reg src = ra_alloc1(as, ir->op2, irt_isfp(ir->t) ? RSET_FPR : RSET_GPR);
- asm_fusexref(as, asm_fxstoreins(ir), src, ir->op1,
- rset_exclude(RSET_GPR, src));
- }
-}
-
-static void asm_ahuvload(ASMState *as, IRIns *ir)
-{
- Reg idx, tmp, type;
- int32_t ofs = 0;
- RegSet gpr = RSET_GPR, allow = irt_isnum(ir->t) ? RSET_FPR : RSET_GPR;
- lua_assert(irt_isnum(ir->t) || irt_ispri(ir->t) || irt_isaddr(ir->t) ||
- irt_isint(ir->t));
- if (ra_used(ir)) {
- Reg dest = ra_dest(as, ir, allow);
- tmp = irt_isnum(ir->t) ? ra_scratch(as, rset_clear(gpr, dest)) : dest;
- if (irt_isaddr(ir->t)) {
- emit_dn(as, A64I_ANDx^emit_isk13(LJ_GCVMASK, 1), dest, dest);
- } else if (irt_isnum(ir->t)) {
- emit_dn(as, A64I_FMOV_D_R, (dest & 31), tmp);
- } else if (irt_isint(ir->t)) {
- emit_dm(as, A64I_MOVw, dest, dest);
- }
- } else {
- tmp = ra_scratch(as, gpr);
- }
- type = ra_scratch(as, rset_clear(gpr, tmp));
- idx = asm_fuseahuref(as, ir->op1, &ofs, rset_clear(gpr, type), A64I_LDRx);
- /* Always do the type check, even if the load result is unused. */
- asm_guardcc(as, irt_isnum(ir->t) ? CC_LS : CC_NE);
- if (irt_type(ir->t) >= IRT_NUM) {
- lua_assert(irt_isinteger(ir->t) || irt_isnum(ir->t));
- emit_nm(as, A64I_CMPx | A64F_SH(A64SH_LSR, 32),
- ra_allock(as, LJ_TISNUM << 15, rset_exclude(gpr, idx)), tmp);
- } else if (irt_isaddr(ir->t)) {
- emit_n(as, (A64I_CMNx^A64I_K12) | A64F_U12(-irt_toitype(ir->t)), type);
- emit_dn(as, A64I_ASRx | A64F_IMMR(47), type, tmp);
- } else if (irt_isnil(ir->t)) {
- emit_n(as, (A64I_CMNx^A64I_K12) | A64F_U12(1), tmp);
- } else {
- emit_nm(as, A64I_CMPx | A64F_SH(A64SH_LSR, 32),
- ra_allock(as, (irt_toitype(ir->t) << 15) | 0x7fff, allow), tmp);
- }
- if (ofs & FUSE_REG)
- emit_dnm(as, (A64I_LDRx^A64I_LS_R)|A64I_LS_UXTWx|A64I_LS_SH, tmp, idx, (ofs & 31));
- else
- emit_lso(as, A64I_LDRx, tmp, idx, ofs);
-}
-
-static void asm_ahustore(ASMState *as, IRIns *ir)
-{
- if (ir->r != RID_SINK) {
- RegSet allow = RSET_GPR;
- Reg idx, src = RID_NONE, tmp = RID_TMP, type = RID_NONE;
- int32_t ofs = 0;
- if (irt_isnum(ir->t)) {
- src = ra_alloc1(as, ir->op2, RSET_FPR);
- idx = asm_fuseahuref(as, ir->op1, &ofs, allow, A64I_STRd);
- if (ofs & FUSE_REG)
- emit_dnm(as, (A64I_STRd^A64I_LS_R)|A64I_LS_UXTWx|A64I_LS_SH, (src & 31), idx, (ofs &31));
- else
- emit_lso(as, A64I_STRd, (src & 31), idx, ofs);
- } else {
- if (!irt_ispri(ir->t)) {
- src = ra_alloc1(as, ir->op2, allow);
- rset_clear(allow, src);
- if (irt_isinteger(ir->t))
- type = ra_allock(as, (uint64_t)(int32_t)LJ_TISNUM << 47, allow);
- else
- type = ra_allock(as, irt_toitype(ir->t), allow);
- } else {
- tmp = type = ra_allock(as, ~((int64_t)~irt_toitype(ir->t)<<47), allow);
- }
- idx = asm_fuseahuref(as, ir->op1, &ofs, rset_exclude(allow, type),
- A64I_STRx);
- if (ofs & FUSE_REG)
- emit_dnm(as, (A64I_STRx^A64I_LS_R)|A64I_LS_UXTWx|A64I_LS_SH, tmp, idx, (ofs & 31));
- else
- emit_lso(as, A64I_STRx, tmp, idx, ofs);
- if (ra_hasreg(src)) {
- if (irt_isinteger(ir->t)) {
- emit_dnm(as, A64I_ADDx | A64F_EX(A64EX_UXTW), tmp, type, src);
- } else {
- emit_dnm(as, A64I_ADDx | A64F_SH(A64SH_LSL, 47), tmp, src, type);
- }
- }
- }
- }
-}
-
-static void asm_sload(ASMState *as, IRIns *ir)
-{
- int32_t ofs = 8*((int32_t)ir->op1-2);
- IRType1 t = ir->t;
- Reg dest = RID_NONE, base;
- RegSet allow = RSET_GPR;
- lua_assert(!(ir->op2 & IRSLOAD_PARENT)); /* Handled by asm_head_side(). */
- lua_assert(irt_isguard(t) || !(ir->op2 & IRSLOAD_TYPECHECK));
- if ((ir->op2 & IRSLOAD_CONVERT) && irt_isguard(t) && irt_isint(t)) {
- dest = ra_scratch(as, RSET_FPR);
- asm_tointg(as, ir, dest);
- t.irt = IRT_NUM; /* Continue with a regular number type check. */
- } else if (ra_used(ir)) {
- Reg tmp = RID_NONE;
- if ((ir->op2 & IRSLOAD_CONVERT))
- tmp = ra_scratch(as, irt_isint(t) ? RSET_FPR : RSET_GPR);
- lua_assert((irt_isnum(t)) || irt_isint(t) || irt_isaddr(t));
- dest = ra_dest(as, ir, irt_isnum(t) ? RSET_FPR : allow);
- base = ra_alloc1(as, REF_BASE, rset_clear(allow, dest));
- if (irt_isaddr(t)) {
- emit_dn(as, A64I_ANDx^emit_isk13(LJ_GCVMASK, 1), dest, dest);
- } else if ((ir->op2 & IRSLOAD_CONVERT)) {
- if (irt_isint(t)) {
- emit_dn(as, A64I_FCVT_S32_F64, dest, (tmp & 31));
- /* If value is already loaded for type check, move it to FPR. */
- if ((ir->op2 & IRSLOAD_TYPECHECK))
- emit_dn(as, A64I_FMOV_D_R, (tmp & 31), dest);
- else
- dest = tmp;
- t.irt = IRT_NUM; /* Check for original type. */
- } else {
- emit_dn(as, A64I_FCVT_F64_S32, (dest & 31), tmp);
- dest = tmp;
- t.irt = IRT_INT; /* Check for original type. */
- }
- } else if (irt_isint(t) && (ir->op2 & IRSLOAD_TYPECHECK)) {
- emit_dm(as, A64I_MOVw, dest, dest);
- }
- goto dotypecheck;
- }
- base = ra_alloc1(as, REF_BASE, allow);
-dotypecheck:
- rset_clear(allow, base);
- if ((ir->op2 & IRSLOAD_TYPECHECK)) {
- Reg tmp;
- if (ra_hasreg(dest) && rset_test(RSET_GPR, dest)) {
- tmp = dest;
- } else {
- tmp = ra_scratch(as, allow);
- rset_clear(allow, tmp);
- }
- if (irt_isnum(t) && !(ir->op2 & IRSLOAD_CONVERT))
- emit_dn(as, A64I_FMOV_D_R, (dest & 31), tmp);
- /* Need type check, even if the load result is unused. */
- asm_guardcc(as, irt_isnum(t) ? CC_LS : CC_NE);
- if (irt_type(t) >= IRT_NUM) {
- lua_assert(irt_isinteger(t) || irt_isnum(t));
- emit_nm(as, A64I_CMPx | A64F_SH(A64SH_LSR, 32),
- ra_allock(as, LJ_TISNUM << 15, allow), tmp);
- } else if (irt_isnil(t)) {
- emit_n(as, (A64I_CMNx^A64I_K12) | A64F_U12(1), tmp);
- } else if (irt_ispri(t)) {
- emit_nm(as, A64I_CMPx,
- ra_allock(as, ~((int64_t)~irt_toitype(t) << 47) , allow), tmp);
- } else {
- Reg type = ra_scratch(as, allow);
- emit_n(as, (A64I_CMNx^A64I_K12) | A64F_U12(-irt_toitype(t)), type);
- emit_dn(as, A64I_ASRx | A64F_IMMR(47), type, tmp);
- }
- emit_lso(as, A64I_LDRx, tmp, base, ofs);
- return;
- }
- if (ra_hasreg(dest)) {
- emit_lso(as, irt_isnum(t) ? A64I_LDRd :
- (irt_isint(t) ? A64I_LDRw : A64I_LDRx), (dest & 31), base,
- ofs ^ ((LJ_BE && irt_isint(t) ? 4 : 0)));
- }
-}
-
-/* -- 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 allow = (RSET_GPR & ~RSET_SCRATCH);
- lua_assert(sz != CTSIZE_INVALID || (ir->o == IR_CNEW && ir->op2 != REF_NIL));
-
- as->gcsteps++;
- asm_setupresult(as, ir, ci); /* GCcdata * */
- /* Initialize immutable cdata object. */
- if (ir->o == IR_CNEWI) {
- int32_t ofs = sizeof(GCcdata);
- Reg r = ra_alloc1(as, ir->op2, allow);
- lua_assert(sz == 4 || sz == 8);
- emit_lso(as, sz == 8 ? A64I_STRx : A64I_STRw, r, RID_RET, ofs);
- } 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. */
- {
- Reg r = (id < 65536) ? RID_X1 : ra_allock(as, id, allow);
- emit_lso(as, A64I_STRB, RID_TMP, RID_RET, offsetof(GCcdata, gct));
- emit_lso(as, A64I_STRH, r, RID_RET, offsetof(GCcdata, ctypeid));
- emit_d(as, A64I_MOVZw | A64F_U16(~LJ_TCDATA), RID_TMP);
- if (id < 65536) emit_d(as, A64I_MOVZw | A64F_U16(id), RID_X1);
- }
- 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 link = ra_scratch(as, rset_exclude(RSET_GPR, tab));
- Reg gr = ra_allock(as, i64ptr(J2G(as->J)),
- rset_exclude(rset_exclude(RSET_GPR, tab), link));
- Reg mark = RID_TMP;
- MCLabel l_end = emit_label(as);
- emit_lso(as, A64I_STRx, link, tab, (int32_t)offsetof(GCtab, gclist));
- emit_lso(as, A64I_STRB, mark, tab, (int32_t)offsetof(GCtab, marked));
- emit_lso(as, A64I_STRx, tab, gr,
- (int32_t)offsetof(global_State, gc.grayagain));
- emit_dn(as, A64I_ANDw^emit_isk13(~LJ_GC_BLACK, 0), mark, mark);
- emit_lso(as, A64I_LDRx, link, gr,
- (int32_t)offsetof(global_State, gc.grayagain));
- emit_cond_branch(as, CC_EQ, l_end);
- emit_n(as, A64I_TSTw^emit_isk13(LJ_GC_BLACK, 0), mark);
- emit_lso(as, A64I_LDRB, 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;
- RegSet allow = RSET_GPR;
- 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);
- ra_allockreg(as, i64ptr(J2G(as->J)), ra_releasetmp(as, ASMREF_TMP1) );
- obj = IR(ir->op1)->r;
- tmp = ra_scratch(as, rset_exclude(allow, obj));
- emit_cond_branch(as, CC_EQ, l_end);
- emit_n(as, A64I_TSTw^emit_isk13(LJ_GC_BLACK, 0), tmp);
- emit_cond_branch(as, CC_EQ, l_end);
- emit_n(as, A64I_TSTw^emit_isk13(LJ_GC_WHITES, 0), RID_TMP);
- val = ra_alloc1(as, ir->op2, rset_exclude(RSET_GPR, obj));
- emit_lso(as, A64I_LDRB, tmp, obj,
- (int32_t)offsetof(GCupval, marked)-(int32_t)offsetof(GCupval, tv));
- emit_lso(as, A64I_LDRB, RID_TMP, val, (int32_t)offsetof(GChead, marked));
-}
-
-/* -- Arithmetic and logic operations ------------------------------------- */
-
-static void asm_fparith(ASMState *as, IRIns *ir, A64Ins ai)
-{
- Reg dest = ra_dest(as, ir, RSET_FPR);
- Reg right, left = ra_alloc2(as, ir, RSET_FPR);
- right = (left >> 8); left &= 255;
- emit_dnm(as, ai, (dest & 31), (left & 31), (right & 31));
-}
-
-static void asm_fpunary(ASMState *as, IRIns *ir, A64Ins ai)
-{
- Reg dest = ra_dest(as, ir, RSET_FPR);
- Reg left = ra_hintalloc(as, ir->op1, dest, RSET_FPR);
- emit_dn(as, ai, (dest & 31), (left & 31));
-}
-
-static void asm_fpmath(ASMState *as, IRIns *ir)
-{
- IRFPMathOp fpm = (IRFPMathOp)ir->op2;
- if (fpm == IRFPM_SQRT) {
- asm_fpunary(as, ir, A64I_FSQRTd);
- } else if (fpm <= IRFPM_TRUNC) {
- asm_fpunary(as, ir, fpm == IRFPM_FLOOR ? A64I_FRINTMd :
- fpm == IRFPM_CEIL ? A64I_FRINTPd : A64I_FRINTZd);
- } else if (fpm == IRFPM_EXP2 && asm_fpjoin_pow(as, ir)) {
- return;
- } else {
- asm_callid(as, ir, IRCALL_lj_vm_floor + fpm);
- }
-}
-
-static int asm_swapops(ASMState *as, IRRef lref, IRRef rref)
-{
- IRIns *ir;
- if (irref_isk(rref))
- return 0; /* Don't swap constants to the left. */
- if (irref_isk(lref))
- return 1; /* But swap constants to the right. */
- ir = IR(rref);
- if ((ir->o >= IR_BSHL && ir->o <= IR_BSAR) ||
- (ir->o == IR_ADD && ir->op1 == ir->op2) ||
- (ir->o == IR_CONV && ir->op2 == ((IRT_I64<<IRCONV_DSH)|IRT_INT|IRCONV_SEXT)))
- return 0; /* Don't swap fusable operands to the left. */
- ir = IR(lref);
- if ((ir->o >= IR_BSHL && ir->o <= IR_BSAR) ||
- (ir->o == IR_ADD && ir->op1 == ir->op2) ||
- (ir->o == IR_CONV && ir->op2 == ((IRT_I64<<IRCONV_DSH)|IRT_INT|IRCONV_SEXT)))
- return 1; /* But swap fusable operands to the right. */
- return 0; /* Otherwise don't swap. */
-}
-
-static void asm_intop(ASMState *as, IRIns *ir, A64Ins ai)
-{
- IRRef lref = ir->op1, rref = ir->op2;
- Reg left, dest = ra_dest(as, ir, RSET_GPR);
- uint32_t m;
- if ((ai & ~A64I_S) != A64I_SUBw && asm_swapops(as, lref, rref)) {
- IRRef tmp = lref; lref = rref; rref = tmp;
- }
- left = ra_hintalloc(as, lref, dest, RSET_GPR);
- if (irt_is64(ir->t)) ai |= A64I_X;
- m = asm_fuseopm(as, ai, rref, rset_exclude(RSET_GPR, left));
- if (irt_isguard(ir->t)) { /* For IR_ADDOV etc. */
- asm_guardcc(as, CC_VS);
- ai |= A64I_S;
- }
- emit_dn(as, ai^m, dest, left);
-}
-
-static void asm_intop_s(ASMState *as, IRIns *ir, A64Ins ai)
-{
- if (as->flagmcp == as->mcp) { /* Drop cmp r, #0. */
- as->flagmcp = NULL;
- as->mcp++;
- ai |= A64I_S;
- }
- asm_intop(as, ir, ai);
-}
-
-static void asm_intneg(ASMState *as, IRIns *ir)
-{
- Reg dest = ra_dest(as, ir, RSET_GPR);
- Reg left = ra_hintalloc(as, ir->op1, dest, RSET_GPR);
- emit_dm(as, irt_is64(ir->t) ? A64I_NEGx : A64I_NEGw, dest, left);
-}
-
-/* NYI: use add/shift for MUL(OV) with constants. FOLD only does 2^k. */
-static void asm_intmul(ASMState *as, IRIns *ir)
-{
- Reg dest = ra_dest(as, ir, RSET_GPR);
- Reg left = ra_alloc1(as, ir->op1, rset_exclude(RSET_GPR, dest));
- Reg right = ra_alloc1(as, ir->op2, rset_exclude(RSET_GPR, left));
- if (irt_isguard(ir->t)) { /* IR_MULOV */
- asm_guardcc(as, CC_NE);
- emit_dm(as, A64I_MOVw, dest, dest); /* Zero-extend. */
- emit_nm(as, A64I_CMPw | A64F_SH(A64SH_ASR, 31), RID_TMP, dest);
- emit_dn(as, A64I_ASRx | A64F_IMMR(32), RID_TMP, dest);
- emit_dnm(as, A64I_SMULL, dest, right, left);
- } else {
- emit_dnm(as, irt_is64(ir->t) ? A64I_MULx : A64I_MULw, dest, left, right);
- }
-}
-
-static void asm_add(ASMState *as, IRIns *ir)
-{
- if (irt_isnum(ir->t)) {
- if (!asm_fusemadd(as, ir, A64I_FMADDd, A64I_FMADDd))
- asm_fparith(as, ir, A64I_FADDd);
- return;
- }
- asm_intop_s(as, ir, A64I_ADDw);
-}
-
-static void asm_sub(ASMState *as, IRIns *ir)
-{
- if (irt_isnum(ir->t)) {
- if (!asm_fusemadd(as, ir, A64I_FNMSUBd, A64I_FMSUBd))
- asm_fparith(as, ir, A64I_FSUBd);
- return;
- }
- asm_intop_s(as, ir, A64I_SUBw);
-}
-
-static void asm_mul(ASMState *as, IRIns *ir)
-{
- if (irt_isnum(ir->t)) {
- asm_fparith(as, ir, A64I_FMULd);
- return;
- }
- asm_intmul(as, ir);
-}
-
-static void asm_div(ASMState *as, IRIns *ir)
-{
-#if 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
- asm_fparith(as, ir, A64I_FDIVd);
-}
-
-static void asm_pow(ASMState *as, IRIns *ir)
-{
-#if 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);
-}
-
-#define asm_addov(as, ir) asm_add(as, ir)
-#define asm_subov(as, ir) asm_sub(as, ir)
-#define asm_mulov(as, ir) asm_mul(as, ir)
-
-#define asm_abs(as, ir) asm_fpunary(as, ir, A64I_FABS)
-#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_mod(ASMState *as, IRIns *ir)
-{
-#if 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);
-}
-
-static void asm_neg(ASMState *as, IRIns *ir)
-{
- if (irt_isnum(ir->t)) {
- asm_fpunary(as, ir, A64I_FNEGd);
- return;
- }
- asm_intneg(as, ir);
-}
-
-static void asm_band(ASMState *as, IRIns *ir)
-{
- A64Ins ai = A64I_ANDw;
- if (asm_fuseandshift(as, ir))
- return;
- if (as->flagmcp == as->mcp) {
- /* Try to drop cmp r, #0. */
- as->flagmcp = NULL;
- as->mcp++;
- ai = A64I_ANDSw;
- }
- asm_intop(as, ir, ai);
-}
-
-static void asm_borbxor(ASMState *as, IRIns *ir, A64Ins ai)
-{
- IRRef lref = ir->op1, rref = ir->op2;
- IRIns *irl = IR(lref), *irr = IR(rref);
- if ((canfuse(as, irl) && irl->o == IR_BNOT && !irref_isk(rref)) ||
- (canfuse(as, irr) && irr->o == IR_BNOT && !irref_isk(lref))) {
- Reg left, dest = ra_dest(as, ir, RSET_GPR);
- uint32_t m;
- if (irl->o == IR_BNOT) {
- IRRef tmp = lref; lref = rref; rref = tmp;
- }
- left = ra_alloc1(as, lref, RSET_GPR);
- ai |= A64I_ON;
- if (irt_is64(ir->t)) ai |= A64I_X;
- m = asm_fuseopm(as, ai, IR(rref)->op1, rset_exclude(RSET_GPR, left));
- emit_dn(as, ai^m, dest, left);
- } else {
- asm_intop(as, ir, ai);
- }
-}
-
-static void asm_bor(ASMState *as, IRIns *ir)
-{
- if (asm_fuseorshift(as, ir))
- return;
- asm_borbxor(as, ir, A64I_ORRw);
-}
-
-#define asm_bxor(as, ir) asm_borbxor(as, ir, A64I_EORw)
-
-static void asm_bnot(ASMState *as, IRIns *ir)
-{
- A64Ins ai = A64I_MVNw;
- Reg dest = ra_dest(as, ir, RSET_GPR);
- uint32_t m = asm_fuseopm(as, ai, ir->op1, RSET_GPR);
- if (irt_is64(ir->t)) ai |= A64I_X;
- emit_d(as, ai^m, dest);
-}
-
-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);
- emit_dn(as, irt_is64(ir->t) ? A64I_REVx : A64I_REVw, dest, left);
-}
-
-static void asm_bitshift(ASMState *as, IRIns *ir, A64Ins ai, A64Shift sh)
-{
- int32_t shmask = irt_is64(ir->t) ? 63 : 31;
- if (irref_isk(ir->op2)) { /* Constant shifts. */
- Reg left, dest = ra_dest(as, ir, RSET_GPR);
- int32_t shift = (IR(ir->op2)->i & shmask);
- IRIns *irl = IR(ir->op1);
- if (shmask == 63) ai += A64I_UBFMx - A64I_UBFMw;
-
- /* Fuse BSHL + BSHR/BSAR into UBFM/SBFM aka UBFX/SBFX/UBFIZ/SBFIZ. */
- if ((sh == A64SH_LSR || sh == A64SH_ASR) && canfuse(as, irl)) {
- if (irl->o == IR_BSHL && irref_isk(irl->op2)) {
- int32_t shift2 = (IR(irl->op2)->i & shmask);
- shift = ((shift - shift2) & shmask);
- shmask -= shift2;
- ir = irl;
- }
- }
-
- left = ra_alloc1(as, ir->op1, RSET_GPR);
- switch (sh) {
- case A64SH_LSL:
- emit_dn(as, ai | A64F_IMMS(shmask-shift) |
- A64F_IMMR((shmask-shift+1)&shmask), dest, left);
- break;
- case A64SH_LSR: case A64SH_ASR:
- emit_dn(as, ai | A64F_IMMS(shmask) | A64F_IMMR(shift), dest, left);
- break;
- case A64SH_ROR:
- emit_dnm(as, ai | A64F_IMMS(shift), dest, left, left);
- break;
- }
- } else { /* Variable-length shifts. */
- Reg dest = ra_dest(as, ir, RSET_GPR);
- Reg left = ra_alloc1(as, ir->op1, RSET_GPR);
- Reg right = ra_alloc1(as, ir->op2, rset_exclude(RSET_GPR, left));
- emit_dnm(as, (shmask == 63 ? A64I_SHRx : A64I_SHRw) | A64F_BSH(sh), dest, left, right);
- }
-}
-
-#define asm_bshl(as, ir) asm_bitshift(as, ir, A64I_UBFMw, A64SH_LSL)
-#define asm_bshr(as, ir) asm_bitshift(as, ir, A64I_UBFMw, A64SH_LSR)
-#define asm_bsar(as, ir) asm_bitshift(as, ir, A64I_SBFMw, A64SH_ASR)
-#define asm_bror(as, ir) asm_bitshift(as, ir, A64I_EXTRw, A64SH_ROR)
-#define asm_brol(as, ir) lua_assert(0)
-
-static void asm_intmin_max(ASMState *as, IRIns *ir, A64CC cc)
-{
- Reg dest = ra_dest(as, ir, RSET_GPR);
- Reg left = ra_hintalloc(as, ir->op1, dest, RSET_GPR);
- Reg right = ra_alloc1(as, ir->op2, rset_exclude(RSET_GPR, left));
- emit_dnm(as, A64I_CSELw|A64F_CC(cc), dest, left, right);
- emit_nm(as, A64I_CMPw, left, right);
-}
-
-static void asm_fpmin_max(ASMState *as, IRIns *ir, A64CC fcc)
-{
- Reg dest = (ra_dest(as, ir, RSET_FPR) & 31);
- Reg right, left = ra_alloc2(as, ir, RSET_FPR);
- right = ((left >> 8) & 31); left &= 31;
- emit_dnm(as, A64I_FCSELd | A64F_CC(fcc), dest, left, right);
- emit_nm(as, A64I_FCMPd, left, right);
-}
-
-static void asm_min_max(ASMState *as, IRIns *ir, A64CC cc, A64CC fcc)
-{
- if (irt_isnum(ir->t))
- asm_fpmin_max(as, ir, fcc);
- else
- asm_intmin_max(as, ir, cc);
-}
-
-#define asm_max(as, ir) asm_min_max(as, ir, CC_GT, CC_HI)
-#define asm_min(as, ir) asm_min_max(as, ir, CC_LT, CC_LO)
-
-/* -- Comparisons --------------------------------------------------------- */
-
-/* Map of comparisons to flags. ORDER IR. */
-static const uint8_t asm_compmap[IR_ABC+1] = {
- /* op FP swp int cc FP cc */
- /* LT */ CC_GE + (CC_HS << 4),
- /* GE x */ CC_LT + (CC_HI << 4),
- /* LE */ CC_GT + (CC_HI << 4),
- /* GT x */ CC_LE + (CC_HS << 4),
- /* ULT x */ CC_HS + (CC_LS << 4),
- /* UGE */ CC_LO + (CC_LO << 4),
- /* ULE x */ CC_HI + (CC_LO << 4),
- /* UGT */ CC_LS + (CC_LS << 4),
- /* EQ */ CC_NE + (CC_NE << 4),
- /* NE */ CC_EQ + (CC_EQ << 4),
- /* ABC */ CC_LS + (CC_LS << 4) /* Same as UGT. */
-};
-
-/* FP comparisons. */
-static void asm_fpcomp(ASMState *as, IRIns *ir)
-{
- Reg left, right;
- A64Ins ai;
- int swp = ((ir->o ^ (ir->o >> 2)) & ~(ir->o >> 3) & 1);
- if (!swp && irref_isk(ir->op2) && ir_knum(IR(ir->op2))->u64 == 0) {
- left = (ra_alloc1(as, ir->op1, RSET_FPR) & 31);
- right = 0;
- ai = A64I_FCMPZd;
- } else {
- left = ra_alloc2(as, ir, RSET_FPR);
- if (swp) {
- right = (left & 31); left = ((left >> 8) & 31);
- } else {
- right = ((left >> 8) & 31); left &= 31;
- }
- ai = A64I_FCMPd;
- }
- asm_guardcc(as, (asm_compmap[ir->o] >> 4));
- emit_nm(as, ai, left, right);
-}
-
-/* Integer comparisons. */
-static void asm_intcomp(ASMState *as, IRIns *ir)
-{
- A64CC oldcc, cc = (asm_compmap[ir->o] & 15);
- A64Ins ai = irt_is64(ir->t) ? A64I_CMPx : A64I_CMPw;
- IRRef lref = ir->op1, rref = ir->op2;
- Reg left;
- uint32_t m;
- int cmpprev0 = 0;
- lua_assert(irt_is64(ir->t) || irt_isint(ir->t) ||
- irt_isu32(ir->t) || irt_isaddr(ir->t) || irt_isu8(ir->t));
- if (asm_swapops(as, lref, rref)) {
- IRRef tmp = lref; lref = rref; rref = tmp;
- if (cc >= CC_GE) cc ^= 7; /* LT <-> GT, LE <-> GE */
- else if (cc > CC_NE) cc ^= 11; /* LO <-> HI, LS <-> HS */
- }
- oldcc = cc;
- if (irref_isk(rref) && get_k64val(IR(rref)) == 0) {
- IRIns *irl = IR(lref);
- if (cc == CC_GE) cc = CC_PL;
- else if (cc == CC_LT) cc = CC_MI;
- else if (cc > CC_NE) goto nocombine; /* Other conds don't work with tst. */
- cmpprev0 = (irl+1 == ir);
- /* Combine and-cmp-bcc into tbz/tbnz or and-cmp into tst. */
- if (cmpprev0 && irl->o == IR_BAND && !ra_used(irl)) {
- IRRef blref = irl->op1, brref = irl->op2;
- uint32_t m2 = 0;
- Reg bleft;
- if (asm_swapops(as, blref, brref)) {
- Reg tmp = blref; blref = brref; brref = tmp;
- }
- if (irref_isk(brref)) {
- uint64_t k = get_k64val(IR(brref));
- if (k && !(k & (k-1)) && (cc == CC_EQ || cc == CC_NE)) {
- asm_guardtnb(as, cc == CC_EQ ? A64I_TBZ : A64I_TBNZ,
- ra_alloc1(as, blref, RSET_GPR), emit_ctz64(k));
- return;
- }
- m2 = emit_isk13(k, irt_is64(irl->t));
- }
- bleft = ra_alloc1(as, blref, RSET_GPR);
- ai = (irt_is64(irl->t) ? A64I_TSTx : A64I_TSTw);
- if (!m2)
- m2 = asm_fuseopm(as, ai, brref, rset_exclude(RSET_GPR, bleft));
- asm_guardcc(as, cc);
- emit_n(as, ai^m2, bleft);
- return;
- }
- if (cc == CC_EQ || cc == CC_NE) {
- /* Combine cmp-bcc into cbz/cbnz. */
- ai = cc == CC_EQ ? A64I_CBZ : A64I_CBNZ;
- if (irt_is64(ir->t)) ai |= A64I_X;
- asm_guardcnb(as, ai, ra_alloc1(as, lref, RSET_GPR));
- return;
- }
- }
-nocombine:
- left = ra_alloc1(as, lref, RSET_GPR);
- m = asm_fuseopm(as, ai, rref, rset_exclude(RSET_GPR, left));
- asm_guardcc(as, cc);
- emit_n(as, ai^m, left);
- /* Signed comparison with zero and referencing previous ins? */
- if (cmpprev0 && (oldcc <= CC_NE || oldcc >= CC_GE))
- as->flagmcp = as->mcp; /* Allow elimination of the compare. */
-}
-
-static void asm_comp(ASMState *as, IRIns *ir)
-{
- if (irt_isnum(ir->t))
- asm_fpcomp(as, ir);
- else
- asm_intcomp(as, ir);
-}
-
-#define asm_equal(as, ir) asm_comp(as, ir)
-
-/* -- 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)
-{
- UNUSED(as); UNUSED(ir); lua_assert(0); /* Unused on 64 bit. */
-}
-
-/* -- Profiling ----------------------------------------------------------- */
-
-static void asm_prof(ASMState *as, IRIns *ir)
-{
- uint32_t k = emit_isk13(HOOK_PROFILE, 0);
- lua_assert(k != 0);
- UNUSED(ir);
- asm_guardcc(as, CC_NE);
- emit_n(as, A64I_TSTw^k, RID_TMP);
- emit_lsptr(as, A64I_LDRB, RID_TMP, (void *)&J2G(as->J)->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)
-{
- Reg pbase;
- uint32_t k;
- if (irp) {
- if (!ra_hasspill(irp->s)) {
- pbase = irp->r;
- lua_assert(ra_hasreg(pbase));
- } else if (allow) {
- pbase = rset_pickbot(allow);
- } else {
- pbase = RID_RET;
- emit_lso(as, A64I_LDRx, RID_RET, RID_SP, 0); /* Restore temp register. */
- }
- } else {
- pbase = RID_BASE;
- }
- emit_cond_branch(as, CC_LS, asm_exitstub_addr(as, exitno));
- k = emit_isk12((8*topslot));
- lua_assert(k);
- emit_n(as, A64I_CMPx^k, RID_TMP);
- emit_dnm(as, A64I_SUBx, RID_TMP, RID_TMP, pbase);
- emit_lso(as, A64I_LDRx, RID_TMP, RID_TMP,
- (int32_t)offsetof(lua_State, maxstack));
- if (irp) { /* Must not spill arbitrary registers in head of side trace. */
- if (ra_hasspill(irp->s))
- emit_lso(as, A64I_LDRx, pbase, RID_SP, sps_scale(irp->s));
- emit_lso(as, A64I_LDRx, RID_TMP, RID_GL, glofs(as, &J2G(as->J)->cur_L));
- if (ra_hasspill(irp->s) && !allow)
- emit_lso(as, A64I_STRx, RID_RET, RID_SP, 0); /* Save temp register. */
- } else {
- emit_getgl(as, RID_TMP, cur_L);
- }
-}
-
-/* Restore Lua stack from on-trace state. */
-static void asm_stack_restore(ASMState *as, SnapShot *snap)
-{
- SnapEntry *map = &as->T->snapmap[snap->mapofs];
-#ifdef 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)) {
- Reg src = ra_alloc1(as, ref, RSET_FPR);
- emit_lso(as, A64I_STRd, (src & 31), RID_BASE, ofs);
- } else {
- asm_tvstore64(as, RID_BASE, ofs, ref);
- }
- 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 tmp1, tmp2;
- ra_evictset(as, RSET_SCRATCH);
- l_end = emit_label(as);
- /* Exit trace if in GCSatomic or GCSfinalize. Avoids syncing GC objects. */
- asm_guardcnb(as, A64I_CBNZ, RID_RET); /* Assumes asm_snap_prep() is done. */
- args[0] = ASMREF_TMP1; /* global_State *g */
- args[1] = ASMREF_TMP2; /* MSize steps */
- asm_gencall(as, ci, args);
- tmp1 = ra_releasetmp(as, ASMREF_TMP1);
- tmp2 = ra_releasetmp(as, ASMREF_TMP2);
- emit_loadi(as, tmp2, as->gcsteps);
- /* Jump around GC step if GC total < GC threshold. */
- emit_cond_branch(as, CC_LS, l_end);
- emit_nm(as, A64I_CMPx, RID_TMP, tmp2);
- emit_lso(as, A64I_LDRx, tmp2, tmp1,
- (int32_t)offsetof(global_State, gc.threshold));
- emit_lso(as, A64I_LDRx, RID_TMP, tmp1,
- (int32_t)offsetof(global_State, gc.total));
- ra_allockreg(as, i64ptr(J2G(as->J)), tmp1);
- 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;
- if (as->loopinv) { /* Inverted loop branch? */
- uint32_t mask = (p[-2] & 0x7e000000) == 0x36000000 ? 0x3fffu : 0x7ffffu;
- ptrdiff_t delta = target - (p - 2);
- /* asm_guard* already inverted the bcc/tnb/cnb and patched the final b. */
- p[-2] |= ((uint32_t)delta & mask) << 5;
- } else {
- ptrdiff_t delta = target - (p - 1);
- p[-1] = A64I_B | A64F_S26(delta);
- }
-}
-
-/* -- Head of trace ------------------------------------------------------- */
-
-/* Reload L register from g->cur_L. */
-static void asm_head_lreg(ASMState *as)
-{
- IRIns *ir = IR(ASMREF_L);
- if (ra_used(ir)) {
- Reg r = ra_dest(as, ir, RSET_GPR);
- emit_getgl(as, r, cur_L);
- ra_evictk(as);
- }
-}
-
-/* Coalesce BASE register for a root trace. */
-static void asm_head_root_base(ASMState *as)
-{
- IRIns *ir;
- asm_head_lreg(as);
- ir = IR(REF_BASE);
- if (ra_hasreg(ir->r) && (rset_test(as->modset, ir->r) || irt_ismarked(ir->t)))
- ra_spill(as, ir);
- ra_destreg(as, ir, RID_BASE);
-}
-
-/* Coalesce BASE register for a side trace. */
-static RegSet asm_head_side_base(ASMState *as, IRIns *irp, RegSet allow)
-{
- IRIns *ir;
- asm_head_lreg(as);
- ir = IR(REF_BASE);
- if (ra_hasreg(ir->r) && (rset_test(as->modset, ir->r) || irt_ismarked(ir->t)))
- ra_spill(as, ir);
- if (ra_hasspill(irp->s)) {
- rset_clear(allow, ra_dest(as, ir, allow));
- } else {
- Reg r = irp->r;
- lua_assert(ra_hasreg(r));
- rset_clear(allow, r);
- if (r != ir->r && !rset_test(as->freeset, r))
- ra_restore(as, regcost_ref(as->cost[r]));
- ra_destreg(as, ir, r);
- }
- return allow;
-}
-
-/* -- Tail of trace ------------------------------------------------------- */
-
-/* Fixup the tail code. */
-static void asm_tail_fixup(ASMState *as, TraceNo lnk)
-{
- MCode *p = as->mctop;
- MCode *target;
- /* Undo the sp adjustment in BC_JLOOP when exiting to the interpreter. */
- int32_t spadj = as->T->spadjust + (lnk ? 0 : sps_scale(SPS_FIXED));
- if (spadj == 0) {
- *--p = A64I_LE(A64I_NOP);
- as->mctop = p;
- } else {
- /* Patch stack adjustment. */
- uint32_t k = emit_isk12(spadj);
- lua_assert(k);
- p[-2] = (A64I_ADDx^k) | A64F_D(RID_SP) | A64F_N(RID_SP);
- }
- /* Patch exit branch. */
- target = lnk ? traceref(as->J, lnk)->mcode : (MCode *)lj_vm_exit_interp;
- p[-1] = A64I_B | A64F_S26((target-p)+1);
-}
-
-/* Prepare tail of code. */
-static void asm_tail_prep(ASMState *as)
-{
- MCode *p = as->mctop - 1; /* Leave room for exit branch. */
- if (as->loopref) {
- as->invmcp = as->mcp = p;
- } else {
- as->mcp = p-1; /* Leave room for stack pointer adjustment. */
- as->invmcp = NULL;
- }
- *p = 0; /* Prevent load/store merging. */
-}
-
-/* -- 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);
- int nslots = 0, ngpr = REGARG_NUMGPR, nfpr = REGARG_NUMFPR;
- asm_collectargs(as, ir, ci, args);
- for (i = 0; i < nargs; i++) {
- if (args[i] && irt_isfp(IR(args[i])->t)) {
- if (nfpr > 0) nfpr--; else nslots += 2;
- } else {
- if (ngpr > 0) ngpr--; else nslots += 2;
- }
- }
- if (nslots > as->evenspill) /* Leave room for args in stack slots. */
- as->evenspill = nslots;
- return REGSP_HINT(RID_RET);
-}
-
-static void asm_setup_target(ASMState *as)
-{
- /* May need extra exit for asm_stack_check on side traces. */
- asm_exitstub_setup(as, as->T->nsnap + (as->parent ? 1 : 0));
-}
-
-#if LJ_BE
-/* ARM64 instructions are always little-endian. Swap for ARM64BE. */
-static void asm_mcode_fixup(MCode *mcode, MSize size)
-{
- MCode *pe = (MCode *)((char *)mcode + size);
- while (mcode < pe) {
- MCode ins = *mcode;
- *mcode++ = lj_bswap(ins);
- }
-}
-#define LJ_TARGET_MCODE_FIXUP 1
-#endif
-
-/* -- 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 *cstart = NULL;
- MCode *mcarea = lj_mcode_patch(J, p, 0);
- MCode *px = exitstub_trace_addr(T, exitno);
- /* Note: this assumes a trace exit is only ever patched once. */
- for (; p < pe; p++) {
- /* Look for exitstub branch, replace with branch to target. */
- ptrdiff_t delta = target - p;
- MCode ins = A64I_LE(*p);
- if ((ins & 0xff000000u) == 0x54000000u &&
- ((ins ^ ((px-p)<<5)) & 0x00ffffe0u) == 0) {
- /* Patch bcc, if within range. */
- if (A64F_S_OK(delta, 19)) {
- *p = A64I_LE((ins & 0xff00001fu) | A64F_S19(delta));
- if (!cstart) cstart = p;
- }
- } else if ((ins & 0xfc000000u) == 0x14000000u &&
- ((ins ^ (px-p)) & 0x03ffffffu) == 0) {
- /* Patch b. */
- lua_assert(A64F_S_OK(delta, 26));
- *p = A64I_LE((ins & 0xfc000000u) | A64F_S26(delta));
- if (!cstart) cstart = p;
- } else if ((ins & 0x7e000000u) == 0x34000000u &&
- ((ins ^ ((px-p)<<5)) & 0x00ffffe0u) == 0) {
- /* Patch cbz/cbnz, if within range. */
- if (A64F_S_OK(delta, 19)) {
- *p = A64I_LE((ins & 0xff00001fu) | A64F_S19(delta));
- if (!cstart) cstart = p;
- }
- } else if ((ins & 0x7e000000u) == 0x36000000u &&
- ((ins ^ ((px-p)<<5)) & 0x0007ffe0u) == 0) {
- /* Patch tbz/tbnz, if within range. */
- if (A64F_S_OK(delta, 14)) {
- *p = A64I_LE((ins & 0xfff8001fu) | A64F_S14(delta));
- if (!cstart) cstart = p;
- }
- }
- }
- { /* Always patch long-range branch in exit stub itself. */
- ptrdiff_t delta = target - px;
- lua_assert(A64F_S_OK(delta, 26));
- *px = A64I_B | A64F_S26(delta);
- if (!cstart) cstart = px;
- }
- lj_mcode_sync(cstart, px+1);
- lj_mcode_patch(J, mcarea, 1);
-}
-
generated by cgit v1.2.3 (git 2.39.1) at 2025-04-06 16:08:39 +0000