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diff --git a/js/src/jit/mips32/Lowering-mips32.cpp b/js/src/jit/mips32/Lowering-mips32.cpp
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+++ b/js/src/jit/mips32/Lowering-mips32.cpp
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * vim: set ts=8 sts=4 et sw=4 tw=99:
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "jit/mips32/Lowering-mips32.h"
+
+#include "jit/mips32/Assembler-mips32.h"
+
+#include "jit/MIR.h"
+
+#include "jit/shared/Lowering-shared-inl.h"
+
+using namespace js;
+using namespace js::jit;
+
+LBoxAllocation
+LIRGeneratorMIPS::useBoxFixed(MDefinition* mir, Register reg1, Register reg2, bool useAtStart)
+{
+ MOZ_ASSERT(mir->type() == MIRType::Value);
+ MOZ_ASSERT(reg1 != reg2);
+
+ ensureDefined(mir);
+ return LBoxAllocation(LUse(reg1, mir->virtualRegister(), useAtStart),
+ LUse(reg2, VirtualRegisterOfPayload(mir), useAtStart));
+}
+
+void
+LIRGeneratorMIPS::visitBox(MBox* box)
+{
+ MDefinition* inner = box->getOperand(0);
+
+ // If the box wrapped a double, it needs a new register.
+ if (IsFloatingPointType(inner->type())) {
+ defineBox(new(alloc()) LBoxFloatingPoint(useRegisterAtStart(inner),
+ tempCopy(inner, 0), inner->type()), box);
+ return;
+ }
+
+ if (box->canEmitAtUses()) {
+ emitAtUses(box);
+ return;
+ }
+
+ if (inner->isConstant()) {
+ defineBox(new(alloc()) LValue(inner->toConstant()->toJSValue()), box);
+ return;
+ }
+
+ LBox* lir = new(alloc()) LBox(use(inner), inner->type());
+
+ // Otherwise, we should not define a new register for the payload portion
+ // of the output, so bypass defineBox().
+ uint32_t vreg = getVirtualRegister();
+
+ // Note that because we're using BogusTemp(), we do not change the type of
+ // the definition. We also do not define the first output as "TYPE",
+ // because it has no corresponding payload at (vreg + 1). Also note that
+ // although we copy the input's original type for the payload half of the
+ // definition, this is only for clarity. BogusTemp() definitions are
+ // ignored.
+ lir->setDef(0, LDefinition(vreg, LDefinition::GENERAL));
+ lir->setDef(1, LDefinition::BogusTemp());
+ box->setVirtualRegister(vreg);
+ add(lir);
+}
+
+void
+LIRGeneratorMIPS::visitUnbox(MUnbox* unbox)
+{
+ MDefinition* inner = unbox->getOperand(0);
+
+ if (inner->type() == MIRType::ObjectOrNull) {
+ LUnboxObjectOrNull* lir = new(alloc()) LUnboxObjectOrNull(useRegisterAtStart(inner));
+ if (unbox->fallible())
+ assignSnapshot(lir, unbox->bailoutKind());
+ defineReuseInput(lir, unbox, 0);
+ return;
+ }
+
+ // An unbox on mips reads in a type tag (either in memory or a register) and
+ // a payload. Unlike most instructions consuming a box, we ask for the type
+ // second, so that the result can re-use the first input.
+ MOZ_ASSERT(inner->type() == MIRType::Value);
+
+ ensureDefined(inner);
+
+ if (IsFloatingPointType(unbox->type())) {
+ LUnboxFloatingPoint* lir = new(alloc()) LUnboxFloatingPoint(useBox(inner), unbox->type());
+ if (unbox->fallible())
+ assignSnapshot(lir, unbox->bailoutKind());
+ define(lir, unbox);
+ return;
+ }
+
+ // Swap the order we use the box pieces so we can re-use the payload
+ // register.
+ LUnbox* lir = new(alloc()) LUnbox;
+ lir->setOperand(0, usePayloadInRegisterAtStart(inner));
+ lir->setOperand(1, useType(inner, LUse::REGISTER));
+
+ if (unbox->fallible())
+ assignSnapshot(lir, unbox->bailoutKind());
+
+ // Types and payloads form two separate intervals. If the type becomes dead
+ // before the payload, it could be used as a Value without the type being
+ // recoverable. Unbox's purpose is to eagerly kill the definition of a type
+ // tag, so keeping both alive (for the purpose of gcmaps) is unappealing.
+ // Instead, we create a new virtual register.
+ defineReuseInput(lir, unbox, 0);
+}
+
+void
+LIRGeneratorMIPS::visitReturn(MReturn* ret)
+{
+ MDefinition* opd = ret->getOperand(0);
+ MOZ_ASSERT(opd->type() == MIRType::Value);
+
+ LReturn* ins = new(alloc()) LReturn;
+ ins->setOperand(0, LUse(JSReturnReg_Type));
+ ins->setOperand(1, LUse(JSReturnReg_Data));
+ fillBoxUses(ins, 0, opd);
+ add(ins);
+}
+
+void
+LIRGeneratorMIPS::defineUntypedPhi(MPhi* phi, size_t lirIndex)
+{
+ LPhi* type = current->getPhi(lirIndex + VREG_TYPE_OFFSET);
+ LPhi* payload = current->getPhi(lirIndex + VREG_DATA_OFFSET);
+
+ uint32_t typeVreg = getVirtualRegister();
+ phi->setVirtualRegister(typeVreg);
+
+ uint32_t payloadVreg = getVirtualRegister();
+ MOZ_ASSERT(typeVreg + 1 == payloadVreg);
+
+ type->setDef(0, LDefinition(typeVreg, LDefinition::TYPE));
+ payload->setDef(0, LDefinition(payloadVreg, LDefinition::PAYLOAD));
+ annotate(type);
+ annotate(payload);
+}
+
+void
+LIRGeneratorMIPS::lowerUntypedPhiInput(MPhi* phi, uint32_t inputPosition,
+ LBlock* block, size_t lirIndex)
+{
+ MDefinition* operand = phi->getOperand(inputPosition);
+ LPhi* type = block->getPhi(lirIndex + VREG_TYPE_OFFSET);
+ LPhi* payload = block->getPhi(lirIndex + VREG_DATA_OFFSET);
+ type->setOperand(inputPosition, LUse(operand->virtualRegister() + VREG_TYPE_OFFSET,
+ LUse::ANY));
+ payload->setOperand(inputPosition, LUse(VirtualRegisterOfPayload(operand), LUse::ANY));
+}
+
+void
+LIRGeneratorMIPS::defineInt64Phi(MPhi* phi, size_t lirIndex)
+{
+ LPhi* low = current->getPhi(lirIndex + INT64LOW_INDEX);
+ LPhi* high = current->getPhi(lirIndex + INT64HIGH_INDEX);
+
+ uint32_t lowVreg = getVirtualRegister();
+
+ phi->setVirtualRegister(lowVreg);
+
+ uint32_t highVreg = getVirtualRegister();
+ MOZ_ASSERT(lowVreg + INT64HIGH_INDEX == highVreg + INT64LOW_INDEX);
+
+ low->setDef(0, LDefinition(lowVreg, LDefinition::INT32));
+ high->setDef(0, LDefinition(highVreg, LDefinition::INT32));
+ annotate(high);
+ annotate(low);
+}
+
+void
+LIRGeneratorMIPS::lowerInt64PhiInput(MPhi* phi, uint32_t inputPosition,
+ LBlock* block, size_t lirIndex)
+{
+ MDefinition* operand = phi->getOperand(inputPosition);
+ LPhi* low = block->getPhi(lirIndex + INT64LOW_INDEX);
+ LPhi* high = block->getPhi(lirIndex + INT64HIGH_INDEX);
+ low->setOperand(inputPosition, LUse(operand->virtualRegister() + INT64LOW_INDEX, LUse::ANY));
+ high->setOperand(inputPosition, LUse(operand->virtualRegister() + INT64HIGH_INDEX, LUse::ANY));
+}
+
+void
+LIRGeneratorMIPS::lowerTruncateDToInt32(MTruncateToInt32* ins)
+{
+ MDefinition* opd = ins->input();
+ MOZ_ASSERT(opd->type() == MIRType::Double);
+
+ define(new(alloc()) LTruncateDToInt32(useRegister(opd), LDefinition::BogusTemp()), ins);
+}
+
+void
+LIRGeneratorMIPS::lowerTruncateFToInt32(MTruncateToInt32* ins)
+{
+ MDefinition* opd = ins->input();
+ MOZ_ASSERT(opd->type() == MIRType::Float32);
+
+ define(new(alloc()) LTruncateFToInt32(useRegister(opd), LDefinition::BogusTemp()), ins);
+}
+
+void
+LIRGeneratorMIPS::lowerDivI64(MDiv* div)
+{
+ if (div->isUnsigned()) {
+ lowerUDivI64(div);
+ return;
+ }
+
+ LDivOrModI64* lir = new(alloc()) LDivOrModI64(useInt64RegisterAtStart(div->lhs()),
+ useInt64RegisterAtStart(div->rhs()));
+
+ defineReturn(lir, div);
+}
+
+void
+LIRGeneratorMIPS::lowerModI64(MMod* mod)
+{
+ if (mod->isUnsigned()) {
+ lowerUModI64(mod);
+ return;
+ }
+
+ LDivOrModI64* lir = new(alloc()) LDivOrModI64(useInt64RegisterAtStart(mod->lhs()),
+ useInt64RegisterAtStart(mod->rhs()));
+
+ defineReturn(lir, mod);
+}
+
+void
+LIRGeneratorMIPS::lowerUDivI64(MDiv* div)
+{
+ LUDivOrModI64* lir = new(alloc()) LUDivOrModI64(useInt64RegisterAtStart(div->lhs()),
+ useInt64RegisterAtStart(div->rhs()));
+ defineReturn(lir, div);
+}
+
+void
+LIRGeneratorMIPS::lowerUModI64(MMod* mod)
+{
+ LUDivOrModI64* lir = new(alloc()) LUDivOrModI64(useInt64RegisterAtStart(mod->lhs()),
+ useInt64RegisterAtStart(mod->rhs()));
+ defineReturn(lir, mod);
+}
+
+void
+LIRGeneratorMIPS::visitRandom(MRandom* ins)
+{
+ LRandom *lir = new(alloc()) LRandom(temp(),
+ temp(),
+ temp(),
+ temp(),
+ temp());
+ defineFixed(lir, ins, LFloatReg(ReturnDoubleReg));
+}
generated by cgit v1.2.3 (git 2.26.2) at 2024-11-10 15:50:24 +0000