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-rw-r--r--js/src/jit/mips64/CodeGenerator-mips64.cpp774
1 files changed, 774 insertions, 0 deletions
diff --git a/js/src/jit/mips64/CodeGenerator-mips64.cpp b/js/src/jit/mips64/CodeGenerator-mips64.cpp
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index 000000000..45f0e69d7
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+++ b/js/src/jit/mips64/CodeGenerator-mips64.cpp
@@ -0,0 +1,774 @@
+/* -*- 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/mips64/CodeGenerator-mips64.h"
+
+#include "mozilla/MathAlgorithms.h"
+
+#include "jit/CodeGenerator.h"
+#include "jit/JitCompartment.h"
+#include "jit/JitFrames.h"
+#include "jit/MIR.h"
+#include "jit/MIRGraph.h"
+#include "js/Conversions.h"
+#include "vm/Shape.h"
+#include "vm/TraceLogging.h"
+
+#include "jit/MacroAssembler-inl.h"
+#include "jit/shared/CodeGenerator-shared-inl.h"
+
+using namespace js;
+using namespace js::jit;
+
+class js::jit::OutOfLineTableSwitch : public OutOfLineCodeBase<CodeGeneratorMIPS64>
+{
+ MTableSwitch* mir_;
+ CodeLabel jumpLabel_;
+
+ void accept(CodeGeneratorMIPS64* codegen) {
+ codegen->visitOutOfLineTableSwitch(this);
+ }
+
+ public:
+ OutOfLineTableSwitch(MTableSwitch* mir)
+ : mir_(mir)
+ {}
+
+ MTableSwitch* mir() const {
+ return mir_;
+ }
+
+ CodeLabel* jumpLabel() {
+ return &jumpLabel_;
+ }
+};
+
+void
+CodeGeneratorMIPS64::visitOutOfLineBailout(OutOfLineBailout* ool)
+{
+ masm.push(ImmWord(ool->snapshot()->snapshotOffset()));
+
+ masm.jump(&deoptLabel_);
+}
+
+void
+CodeGeneratorMIPS64::visitOutOfLineTableSwitch(OutOfLineTableSwitch* ool)
+{
+ MTableSwitch* mir = ool->mir();
+
+ masm.haltingAlign(sizeof(void*));
+ masm.bind(ool->jumpLabel()->target());
+ masm.addCodeLabel(*ool->jumpLabel());
+
+ for (size_t i = 0; i < mir->numCases(); i++) {
+ LBlock* caseblock = skipTrivialBlocks(mir->getCase(i))->lir();
+ Label* caseheader = caseblock->label();
+ uint32_t caseoffset = caseheader->offset();
+
+ // The entries of the jump table need to be absolute addresses and thus
+ // must be patched after codegen is finished. Each table entry uses 8
+ // instructions (4 for load address, 2 for branch, and 2 padding).
+ CodeLabel cl;
+ masm.ma_li(ScratchRegister, cl.patchAt());
+ masm.branch(ScratchRegister);
+ masm.as_nop();
+ masm.as_nop();
+ cl.target()->bind(caseoffset);
+ masm.addCodeLabel(cl);
+ }
+}
+
+void
+CodeGeneratorMIPS64::emitTableSwitchDispatch(MTableSwitch* mir, Register index,
+ Register address)
+{
+ Label* defaultcase = skipTrivialBlocks(mir->getDefault())->lir()->label();
+
+ // Lower value with low value
+ if (mir->low() != 0)
+ masm.subPtr(Imm32(mir->low()), index);
+
+ // Jump to default case if input is out of range
+ int32_t cases = mir->numCases();
+ masm.branch32(Assembler::AboveOrEqual, index, Imm32(cases), defaultcase);
+
+ // To fill in the CodeLabels for the case entries, we need to first
+ // generate the case entries (we don't yet know their offsets in the
+ // instruction stream).
+ OutOfLineTableSwitch* ool = new(alloc()) OutOfLineTableSwitch(mir);
+ addOutOfLineCode(ool, mir);
+
+ // Compute the position where a pointer to the right case stands.
+ masm.ma_li(address, ool->jumpLabel()->patchAt());
+ // index = size of table entry * index.
+ // See CodeGeneratorMIPS64::visitOutOfLineTableSwitch
+ masm.lshiftPtr(Imm32(5), index);
+ masm.addPtr(index, address);
+
+ masm.branch(address);
+}
+
+FrameSizeClass
+FrameSizeClass::FromDepth(uint32_t frameDepth)
+{
+ return FrameSizeClass::None();
+}
+
+FrameSizeClass
+FrameSizeClass::ClassLimit()
+{
+ return FrameSizeClass(0);
+}
+
+uint32_t
+FrameSizeClass::frameSize() const
+{
+ MOZ_CRASH("MIPS64 does not use frame size classes");
+}
+
+ValueOperand
+CodeGeneratorMIPS64::ToValue(LInstruction* ins, size_t pos)
+{
+ return ValueOperand(ToRegister(ins->getOperand(pos)));
+}
+
+ValueOperand
+CodeGeneratorMIPS64::ToOutValue(LInstruction* ins)
+{
+ return ValueOperand(ToRegister(ins->getDef(0)));
+}
+
+ValueOperand
+CodeGeneratorMIPS64::ToTempValue(LInstruction* ins, size_t pos)
+{
+ return ValueOperand(ToRegister(ins->getTemp(pos)));
+}
+
+void
+CodeGeneratorMIPS64::visitBox(LBox* box)
+{
+ const LAllocation* in = box->getOperand(0);
+ const LDefinition* result = box->getDef(0);
+
+ if (IsFloatingPointType(box->type())) {
+ FloatRegister reg = ToFloatRegister(in);
+ if (box->type() == MIRType::Float32) {
+ masm.convertFloat32ToDouble(reg, ScratchDoubleReg);
+ reg = ScratchDoubleReg;
+ }
+ masm.moveFromDouble(reg, ToRegister(result));
+ } else {
+ masm.boxValue(ValueTypeFromMIRType(box->type()), ToRegister(in), ToRegister(result));
+ }
+}
+
+void
+CodeGeneratorMIPS64::visitUnbox(LUnbox* unbox)
+{
+ MUnbox* mir = unbox->mir();
+
+ if (mir->fallible()) {
+ const ValueOperand value = ToValue(unbox, LUnbox::Input);
+ masm.splitTag(value, SecondScratchReg);
+ bailoutCmp32(Assembler::NotEqual, SecondScratchReg, Imm32(MIRTypeToTag(mir->type())),
+ unbox->snapshot());
+ }
+
+ LAllocation* input = unbox->getOperand(LUnbox::Input);
+ Register result = ToRegister(unbox->output());
+ if (input->isRegister()) {
+ Register inputReg = ToRegister(input);
+ switch (mir->type()) {
+ case MIRType::Int32:
+ masm.unboxInt32(inputReg, result);
+ break;
+ case MIRType::Boolean:
+ masm.unboxBoolean(inputReg, result);
+ break;
+ case MIRType::Object:
+ masm.unboxObject(inputReg, result);
+ break;
+ case MIRType::String:
+ masm.unboxString(inputReg, result);
+ break;
+ case MIRType::Symbol:
+ masm.unboxSymbol(inputReg, result);
+ break;
+ default:
+ MOZ_CRASH("Given MIRType cannot be unboxed.");
+ }
+ return;
+ }
+
+ Address inputAddr = ToAddress(input);
+ switch (mir->type()) {
+ case MIRType::Int32:
+ masm.unboxInt32(inputAddr, result);
+ break;
+ case MIRType::Boolean:
+ masm.unboxBoolean(inputAddr, result);
+ break;
+ case MIRType::Object:
+ masm.unboxObject(inputAddr, result);
+ break;
+ case MIRType::String:
+ masm.unboxString(inputAddr, result);
+ break;
+ case MIRType::Symbol:
+ masm.unboxSymbol(inputAddr, result);
+ break;
+ default:
+ MOZ_CRASH("Given MIRType cannot be unboxed.");
+ }
+}
+
+Register
+CodeGeneratorMIPS64::splitTagForTest(const ValueOperand& value)
+{
+ MOZ_ASSERT(value.valueReg() != SecondScratchReg);
+ masm.splitTag(value.valueReg(), SecondScratchReg);
+ return SecondScratchReg;
+}
+
+void
+CodeGeneratorMIPS64::visitCompareB(LCompareB* lir)
+{
+ MCompare* mir = lir->mir();
+
+ const ValueOperand lhs = ToValue(lir, LCompareB::Lhs);
+ const LAllocation* rhs = lir->rhs();
+ const Register output = ToRegister(lir->output());
+
+ MOZ_ASSERT(mir->jsop() == JSOP_STRICTEQ || mir->jsop() == JSOP_STRICTNE);
+ Assembler::Condition cond = JSOpToCondition(mir->compareType(), mir->jsop());
+
+ // Load boxed boolean in ScratchRegister.
+ if (rhs->isConstant())
+ masm.moveValue(rhs->toConstant()->toJSValue(), ScratchRegister);
+ else
+ masm.boxValue(JSVAL_TYPE_BOOLEAN, ToRegister(rhs), ScratchRegister);
+
+ // Perform the comparison.
+ masm.cmpPtrSet(cond, lhs.valueReg(), ScratchRegister, output);
+}
+
+void
+CodeGeneratorMIPS64::visitCompareBAndBranch(LCompareBAndBranch* lir)
+{
+ MCompare* mir = lir->cmpMir();
+ const ValueOperand lhs = ToValue(lir, LCompareBAndBranch::Lhs);
+ const LAllocation* rhs = lir->rhs();
+
+ MOZ_ASSERT(mir->jsop() == JSOP_STRICTEQ || mir->jsop() == JSOP_STRICTNE);
+
+ // Load boxed boolean in ScratchRegister.
+ if (rhs->isConstant())
+ masm.moveValue(rhs->toConstant()->toJSValue(), ScratchRegister);
+ else
+ masm.boxValue(JSVAL_TYPE_BOOLEAN, ToRegister(rhs), ScratchRegister);
+
+ // Perform the comparison.
+ Assembler::Condition cond = JSOpToCondition(mir->compareType(), mir->jsop());
+ emitBranch(lhs.valueReg(), ScratchRegister, cond, lir->ifTrue(), lir->ifFalse());
+}
+
+void
+CodeGeneratorMIPS64::visitCompareBitwise(LCompareBitwise* lir)
+{
+ MCompare* mir = lir->mir();
+ Assembler::Condition cond = JSOpToCondition(mir->compareType(), mir->jsop());
+ const ValueOperand lhs = ToValue(lir, LCompareBitwise::LhsInput);
+ const ValueOperand rhs = ToValue(lir, LCompareBitwise::RhsInput);
+ const Register output = ToRegister(lir->output());
+
+ MOZ_ASSERT(IsEqualityOp(mir->jsop()));
+
+ masm.cmpPtrSet(cond, lhs.valueReg(), rhs.valueReg(), output);
+}
+
+void
+CodeGeneratorMIPS64::visitCompareBitwiseAndBranch(LCompareBitwiseAndBranch* lir)
+{
+ MCompare* mir = lir->cmpMir();
+ Assembler::Condition cond = JSOpToCondition(mir->compareType(), mir->jsop());
+ const ValueOperand lhs = ToValue(lir, LCompareBitwiseAndBranch::LhsInput);
+ const ValueOperand rhs = ToValue(lir, LCompareBitwiseAndBranch::RhsInput);
+
+ MOZ_ASSERT(mir->jsop() == JSOP_EQ || mir->jsop() == JSOP_STRICTEQ ||
+ mir->jsop() == JSOP_NE || mir->jsop() == JSOP_STRICTNE);
+
+ emitBranch(lhs.valueReg(), rhs.valueReg(), cond, lir->ifTrue(), lir->ifFalse());
+}
+
+void
+CodeGeneratorMIPS64::visitCompareI64(LCompareI64* lir)
+{
+ MCompare* mir = lir->mir();
+ MOZ_ASSERT(mir->compareType() == MCompare::Compare_Int64 ||
+ mir->compareType() == MCompare::Compare_UInt64);
+
+ const LInt64Allocation lhs = lir->getInt64Operand(LCompareI64::Lhs);
+ const LInt64Allocation rhs = lir->getInt64Operand(LCompareI64::Rhs);
+ Register lhsReg = ToRegister64(lhs).reg;
+ Register output = ToRegister(lir->output());
+ Register rhsReg;
+
+ if (IsConstant(rhs)) {
+ rhsReg = ScratchRegister;
+ masm.ma_li(rhsReg, ImmWord(ToInt64(rhs)));
+ } else {
+ rhsReg = ToRegister64(rhs).reg;
+ }
+
+ bool isSigned = mir->compareType() == MCompare::Compare_Int64;
+ masm.cmpPtrSet(JSOpToCondition(lir->jsop(), isSigned), lhsReg, rhsReg, output);
+}
+
+void
+CodeGeneratorMIPS64::visitCompareI64AndBranch(LCompareI64AndBranch* lir)
+{
+ MCompare* mir = lir->cmpMir();
+ MOZ_ASSERT(mir->compareType() == MCompare::Compare_Int64 ||
+ mir->compareType() == MCompare::Compare_UInt64);
+
+ const LInt64Allocation lhs = lir->getInt64Operand(LCompareI64::Lhs);
+ const LInt64Allocation rhs = lir->getInt64Operand(LCompareI64::Rhs);
+ Register lhsReg = ToRegister64(lhs).reg;
+ Register rhsReg;
+
+ if (IsConstant(rhs)) {
+ rhsReg = ScratchRegister;
+ masm.ma_li(rhsReg, ImmWord(ToInt64(rhs)));
+ } else {
+ rhsReg = ToRegister64(rhs).reg;
+ }
+
+ bool isSigned = mir->compareType() == MCompare::Compare_Int64;
+ Assembler::Condition cond = JSOpToCondition(lir->jsop(), isSigned);
+ emitBranch(lhsReg, rhsReg, cond, lir->ifTrue(), lir->ifFalse());
+}
+
+void
+CodeGeneratorMIPS64::visitDivOrModI64(LDivOrModI64* lir)
+{
+ Register lhs = ToRegister(lir->lhs());
+ Register rhs = ToRegister(lir->rhs());
+ Register output = ToRegister(lir->output());
+
+ Label done;
+
+ // Handle divide by zero.
+ if (lir->canBeDivideByZero())
+ masm.ma_b(rhs, rhs, trap(lir, wasm::Trap::IntegerDivideByZero), Assembler::Zero);
+
+ // Handle an integer overflow exception from INT64_MIN / -1.
+ if (lir->canBeNegativeOverflow()) {
+ Label notmin;
+ masm.branchPtr(Assembler::NotEqual, lhs, ImmWord(INT64_MIN), &notmin);
+ masm.branchPtr(Assembler::NotEqual, rhs, ImmWord(-1), &notmin);
+ if (lir->mir()->isMod()) {
+ masm.ma_xor(output, output);
+ } else {
+ masm.jump(trap(lir, wasm::Trap::IntegerOverflow));
+ }
+ masm.jump(&done);
+ masm.bind(&notmin);
+ }
+
+ masm.as_ddiv(lhs, rhs);
+
+ if (lir->mir()->isMod())
+ masm.as_mfhi(output);
+ else
+ masm.as_mflo(output);
+
+ masm.bind(&done);
+}
+
+void
+CodeGeneratorMIPS64::visitUDivOrModI64(LUDivOrModI64* lir)
+{
+ Register lhs = ToRegister(lir->lhs());
+ Register rhs = ToRegister(lir->rhs());
+ Register output = ToRegister(lir->output());
+
+ Label done;
+
+ // Prevent divide by zero.
+ if (lir->canBeDivideByZero())
+ masm.ma_b(rhs, rhs, trap(lir, wasm::Trap::IntegerDivideByZero), Assembler::Zero);
+
+ masm.as_ddivu(lhs, rhs);
+
+ if (lir->mir()->isMod())
+ masm.as_mfhi(output);
+ else
+ masm.as_mflo(output);
+
+ masm.bind(&done);
+}
+
+template <typename T>
+void
+CodeGeneratorMIPS64::emitWasmLoadI64(T* lir)
+{
+ const MWasmLoad* mir = lir->mir();
+
+ MOZ_ASSERT(lir->mir()->type() == MIRType::Int64);
+
+ uint32_t offset = mir->access().offset();
+ MOZ_ASSERT(offset < wasm::OffsetGuardLimit);
+
+ Register ptr = ToRegister(lir->ptr());
+
+ // Maybe add the offset.
+ if (offset) {
+ Register ptrPlusOffset = ToRegister(lir->ptrCopy());
+ masm.addPtr(Imm32(offset), ptrPlusOffset);
+ ptr = ptrPlusOffset;
+ } else {
+ MOZ_ASSERT(lir->ptrCopy()->isBogusTemp());
+ }
+
+ unsigned byteSize = mir->access().byteSize();
+ bool isSigned;
+
+ switch (mir->access().type()) {
+ case Scalar::Int8: isSigned = true; break;
+ case Scalar::Uint8: isSigned = false; break;
+ case Scalar::Int16: isSigned = true; break;
+ case Scalar::Uint16: isSigned = false; break;
+ case Scalar::Int32: isSigned = true; break;
+ case Scalar::Uint32: isSigned = false; break;
+ case Scalar::Int64: isSigned = true; break;
+ default: MOZ_CRASH("unexpected array type");
+ }
+
+ masm.memoryBarrier(mir->access().barrierBefore());
+
+ if (mir->access().isUnaligned()) {
+ Register temp = ToRegister(lir->getTemp(1));
+
+ masm.ma_load_unaligned(ToOutRegister64(lir).reg, BaseIndex(HeapReg, ptr, TimesOne),
+ temp, static_cast<LoadStoreSize>(8 * byteSize),
+ isSigned ? SignExtend : ZeroExtend);
+ return;
+ }
+
+ masm.ma_load(ToOutRegister64(lir).reg, BaseIndex(HeapReg, ptr, TimesOne),
+ static_cast<LoadStoreSize>(8 * byteSize), isSigned ? SignExtend : ZeroExtend);
+
+ masm.memoryBarrier(mir->access().barrierAfter());
+}
+
+void
+CodeGeneratorMIPS64::visitWasmLoadI64(LWasmLoadI64* lir)
+{
+ emitWasmLoadI64(lir);
+}
+
+void
+CodeGeneratorMIPS64::visitWasmUnalignedLoadI64(LWasmUnalignedLoadI64* lir)
+{
+ emitWasmLoadI64(lir);
+}
+
+template <typename T>
+void
+CodeGeneratorMIPS64::emitWasmStoreI64(T* lir)
+{
+ const MWasmStore* mir = lir->mir();
+
+ MOZ_ASSERT(lir->mir()->type() == MIRType::Int64);
+
+ uint32_t offset = mir->access().offset();
+ MOZ_ASSERT(offset < wasm::OffsetGuardLimit);
+
+ Register ptr = ToRegister(lir->ptr());
+
+ // Maybe add the offset.
+ if (offset) {
+ Register ptrPlusOffset = ToRegister(lir->ptrCopy());
+ masm.addPtr(Imm32(offset), ptrPlusOffset);
+ ptr = ptrPlusOffset;
+ } else {
+ MOZ_ASSERT(lir->ptrCopy()->isBogusTemp());
+ }
+
+ unsigned byteSize = mir->access().byteSize();
+ bool isSigned;
+
+ switch (mir->access().type()) {
+ case Scalar::Int8: isSigned = true; break;
+ case Scalar::Uint8: isSigned = false; break;
+ case Scalar::Int16: isSigned = true; break;
+ case Scalar::Uint16: isSigned = false; break;
+ case Scalar::Int32: isSigned = true; break;
+ case Scalar::Uint32: isSigned = false; break;
+ case Scalar::Int64: isSigned = true; break;
+ default: MOZ_CRASH("unexpected array type");
+ }
+
+ masm.memoryBarrier(mir->access().barrierBefore());
+
+ if (mir->access().isUnaligned()) {
+ Register temp = ToRegister(lir->getTemp(1));
+
+ masm.ma_store_unaligned(ToRegister64(lir->value()).reg, BaseIndex(HeapReg, ptr, TimesOne),
+ temp, static_cast<LoadStoreSize>(8 * byteSize),
+ isSigned ? SignExtend : ZeroExtend);
+ return;
+ }
+ masm.ma_store(ToRegister64(lir->value()).reg, BaseIndex(HeapReg, ptr, TimesOne),
+ static_cast<LoadStoreSize>(8 * byteSize), isSigned ? SignExtend : ZeroExtend);
+
+ masm.memoryBarrier(mir->access().barrierAfter());
+}
+
+void
+CodeGeneratorMIPS64::visitWasmStoreI64(LWasmStoreI64* lir)
+{
+ emitWasmStoreI64(lir);
+}
+
+void
+CodeGeneratorMIPS64::visitWasmUnalignedStoreI64(LWasmUnalignedStoreI64* lir)
+{
+ emitWasmStoreI64(lir);
+}
+
+void
+CodeGeneratorMIPS64::visitWasmLoadGlobalVarI64(LWasmLoadGlobalVarI64* ins)
+{
+ const MWasmLoadGlobalVar* mir = ins->mir();
+ unsigned addr = mir->globalDataOffset() - WasmGlobalRegBias;
+ MOZ_ASSERT(mir->type() == MIRType::Int64);
+ masm.load64(Address(GlobalReg, addr), ToOutRegister64(ins));
+}
+
+void
+CodeGeneratorMIPS64::visitWasmStoreGlobalVarI64(LWasmStoreGlobalVarI64* ins)
+{
+ const MWasmStoreGlobalVar* mir = ins->mir();
+ unsigned addr = mir->globalDataOffset() - WasmGlobalRegBias;
+ MOZ_ASSERT(mir->value()->type() == MIRType::Int64);
+ masm.store64(ToRegister64(ins->value()), Address(GlobalReg, addr));
+}
+
+void
+CodeGeneratorMIPS64::visitWasmSelectI64(LWasmSelectI64* lir)
+{
+ MOZ_ASSERT(lir->mir()->type() == MIRType::Int64);
+
+ Register cond = ToRegister(lir->condExpr());
+ const LInt64Allocation falseExpr = lir->falseExpr();
+
+ Register64 out = ToOutRegister64(lir);
+ MOZ_ASSERT(ToRegister64(lir->trueExpr()) == out, "true expr is reused for input");
+
+ if (falseExpr.value().isRegister()) {
+ masm.as_movz(out.reg, ToRegister(falseExpr.value()), cond);
+ } else {
+ Label done;
+ masm.ma_b(cond, cond, &done, Assembler::NonZero, ShortJump);
+ masm.loadPtr(ToAddress(falseExpr.value()), out.reg);
+ masm.bind(&done);
+ }
+}
+
+void
+CodeGeneratorMIPS64::visitWasmReinterpretFromI64(LWasmReinterpretFromI64* lir)
+{
+ MOZ_ASSERT(lir->mir()->type() == MIRType::Double);
+ MOZ_ASSERT(lir->mir()->input()->type() == MIRType::Int64);
+ masm.as_dmtc1(ToRegister(lir->input()), ToFloatRegister(lir->output()));
+}
+
+void
+CodeGeneratorMIPS64::visitWasmReinterpretToI64(LWasmReinterpretToI64* lir)
+{
+ MOZ_ASSERT(lir->mir()->type() == MIRType::Int64);
+ MOZ_ASSERT(lir->mir()->input()->type() == MIRType::Double);
+ masm.as_dmfc1(ToRegister(lir->output()), ToFloatRegister(lir->input()));
+}
+
+void
+CodeGeneratorMIPS64::visitExtendInt32ToInt64(LExtendInt32ToInt64* lir)
+{
+ const LAllocation* input = lir->getOperand(0);
+ Register output = ToRegister(lir->output());
+
+ if (lir->mir()->isUnsigned())
+ masm.ma_dext(output, ToRegister(input), Imm32(0), Imm32(32));
+ else
+ masm.ma_sll(output, ToRegister(input), Imm32(0));
+}
+
+void
+CodeGeneratorMIPS64::visitWrapInt64ToInt32(LWrapInt64ToInt32* lir)
+{
+ const LAllocation* input = lir->getOperand(0);
+ Register output = ToRegister(lir->output());
+
+ if (lir->mir()->bottomHalf()) {
+ if (input->isMemory())
+ masm.load32(ToAddress(input), output);
+ else
+ masm.ma_sll(output, ToRegister(input), Imm32(0));
+ } else {
+ MOZ_CRASH("Not implemented.");
+ }
+}
+
+void
+CodeGeneratorMIPS64::visitClzI64(LClzI64* lir)
+{
+ Register64 input = ToRegister64(lir->getInt64Operand(0));
+ Register64 output = ToOutRegister64(lir);
+ masm.clz64(input, output.reg);
+}
+
+void
+CodeGeneratorMIPS64::visitCtzI64(LCtzI64* lir)
+{
+ Register64 input = ToRegister64(lir->getInt64Operand(0));
+ Register64 output = ToOutRegister64(lir);
+ masm.ctz64(input, output.reg);
+}
+
+void
+CodeGeneratorMIPS64::visitNotI64(LNotI64* lir)
+{
+ Register64 input = ToRegister64(lir->getInt64Operand(0));
+ Register output = ToRegister(lir->output());
+
+ masm.cmp64Set(Assembler::Equal, input.reg, Imm32(0), output);
+}
+
+void
+CodeGeneratorMIPS64::visitWasmTruncateToInt64(LWasmTruncateToInt64* lir)
+{
+ FloatRegister input = ToFloatRegister(lir->input());
+ Register output = ToRegister(lir->output());
+
+ MWasmTruncateToInt64* mir = lir->mir();
+ MIRType fromType = mir->input()->type();
+
+ MOZ_ASSERT(fromType == MIRType::Double || fromType == MIRType::Float32);
+
+ auto* ool = new (alloc()) OutOfLineWasmTruncateCheck(mir, input);
+ addOutOfLineCode(ool, mir);
+
+ if (mir->isUnsigned()) {
+ Label isLarge, done;
+
+ if (fromType == MIRType::Double) {
+ masm.loadConstantDouble(double(INT64_MAX), ScratchDoubleReg);
+ masm.ma_bc1d(ScratchDoubleReg, input, &isLarge,
+ Assembler::DoubleLessThanOrEqual, ShortJump);
+
+ masm.as_truncld(ScratchDoubleReg, input);
+ } else {
+ masm.loadConstantFloat32(float(INT64_MAX), ScratchFloat32Reg);
+ masm.ma_bc1s(ScratchFloat32Reg, input, &isLarge,
+ Assembler::DoubleLessThanOrEqual, ShortJump);
+
+ masm.as_truncls(ScratchDoubleReg, input);
+ }
+
+ // Check that the result is in the uint64_t range.
+ masm.moveFromDouble(ScratchDoubleReg, output);
+ masm.as_cfc1(ScratchRegister, Assembler::FCSR);
+ masm.as_ext(ScratchRegister, ScratchRegister, 16, 1);
+ masm.ma_dsrl(SecondScratchReg, output, Imm32(63));
+ masm.ma_or(SecondScratchReg, ScratchRegister);
+ masm.ma_b(SecondScratchReg, Imm32(0), ool->entry(), Assembler::NotEqual);
+
+ masm.ma_b(&done, ShortJump);
+
+ // The input is greater than double(INT64_MAX).
+ masm.bind(&isLarge);
+ if (fromType == MIRType::Double) {
+ masm.as_subd(ScratchDoubleReg, input, ScratchDoubleReg);
+ masm.as_truncld(ScratchDoubleReg, ScratchDoubleReg);
+ } else {
+ masm.as_subs(ScratchDoubleReg, input, ScratchDoubleReg);
+ masm.as_truncls(ScratchDoubleReg, ScratchDoubleReg);
+ }
+
+ // Check that the result is in the uint64_t range.
+ masm.moveFromDouble(ScratchDoubleReg, output);
+ masm.as_cfc1(ScratchRegister, Assembler::FCSR);
+ masm.as_ext(ScratchRegister, ScratchRegister, 16, 1);
+ masm.ma_dsrl(SecondScratchReg, output, Imm32(63));
+ masm.ma_or(SecondScratchReg, ScratchRegister);
+ masm.ma_b(SecondScratchReg, Imm32(0), ool->entry(), Assembler::NotEqual);
+
+ masm.ma_li(ScratchRegister, Imm32(1));
+ masm.ma_dins(output, ScratchRegister, Imm32(63), Imm32(1));
+
+ masm.bind(&done);
+ return;
+ }
+
+ // When the input value is Infinity, NaN, or rounds to an integer outside the
+ // range [INT64_MIN; INT64_MAX + 1[, the Invalid Operation flag is set in the FCSR.
+ if (fromType == MIRType::Double)
+ masm.as_truncld(ScratchDoubleReg, input);
+ else
+ masm.as_truncls(ScratchDoubleReg, input);
+
+ // Check that the result is in the int64_t range.
+ masm.as_cfc1(output, Assembler::FCSR);
+ masm.as_ext(output, output, 16, 1);
+ masm.ma_b(output, Imm32(0), ool->entry(), Assembler::NotEqual);
+
+ masm.bind(ool->rejoin());
+ masm.moveFromDouble(ScratchDoubleReg, output);
+}
+
+void
+CodeGeneratorMIPS64::visitInt64ToFloatingPoint(LInt64ToFloatingPoint* lir)
+{
+ Register input = ToRegister(lir->input());
+ FloatRegister output = ToFloatRegister(lir->output());
+
+ MIRType outputType = lir->mir()->type();
+ MOZ_ASSERT(outputType == MIRType::Double || outputType == MIRType::Float32);
+
+ if (outputType == MIRType::Double) {
+ if (lir->mir()->isUnsigned())
+ masm.convertUInt64ToDouble(input, output);
+ else
+ masm.convertInt64ToDouble(input, output);
+ } else {
+ if (lir->mir()->isUnsigned())
+ masm.convertUInt64ToFloat32(input, output);
+ else
+ masm.convertInt64ToFloat32(input, output);
+ }
+}
+
+void
+CodeGeneratorMIPS64::visitTestI64AndBranch(LTestI64AndBranch* lir)
+{
+ Register64 input = ToRegister64(lir->getInt64Operand(0));
+ MBasicBlock* ifTrue = lir->ifTrue();
+ MBasicBlock* ifFalse = lir->ifFalse();
+
+ emitBranch(input.reg, Imm32(0), Assembler::NonZero, ifTrue, ifFalse);
+}
+
+void
+CodeGeneratorMIPS64::setReturnDoubleRegs(LiveRegisterSet* regs)
+{
+ MOZ_ASSERT(ReturnFloat32Reg.reg_ == FloatRegisters::f0);
+ MOZ_ASSERT(ReturnDoubleReg.reg_ == FloatRegisters::f0);
+ FloatRegister f1 = { FloatRegisters::f1, FloatRegisters::Single };
+ regs->add(ReturnFloat32Reg);
+ regs->add(f1);
+ regs->add(ReturnDoubleReg);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-13 03:19:53 +0000