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C++ MCompare类代码示例

本文整理汇总了C++中MCompare类的典型用法代码示例。如果您正苦于以下问题：C++ MCompare类的具体用法？C++ MCompare怎么用？C++ MCompare使用的例子？那么, 这里精选的类代码示例或许可以为您提供帮助。


在下文中一共展示了MCompare类的15个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: ToValue

bool
CodeGeneratorX86::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());

    JS_ASSERT(mir->jsop() == JSOP_STRICTEQ || mir->jsop() == JSOP_STRICTNE);

    Label notBoolean, done;
    masm.branchTestBoolean(Assembler::NotEqual, lhs, &notBoolean);
    {
        if (rhs->isConstant())
            masm.cmp32(lhs.payloadReg(), Imm32(rhs->toConstant()->toBoolean()));
        else
            masm.cmp32(lhs.payloadReg(), ToRegister(rhs));
        masm.emitSet(JSOpToCondition(mir->jsop()), output);
        masm.jump(&done);
    }
    masm.bind(&notBoolean);
    {
        masm.move32(Imm32(mir->jsop() == JSOP_STRICTNE), output);
    }

    masm.bind(&done);
    return true;
}
开发者ID:kls88，项目名称:Spidermonkey，代码行数:29，代码来源:CodeGenerator-x86.cpp

示例2: JSOpToCondition

void
CodeGeneratorX86::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()));

    Label notEqual, done;
    masm.cmp32(lhs.typeReg(), rhs.typeReg());
    masm.j(Assembler::NotEqual, &notEqual);
    {
        masm.cmp32(lhs.payloadReg(), rhs.payloadReg());
        masm.emitSet(cond, output);
        masm.jump(&done);
    }
    masm.bind(&notEqual);
    {
        masm.move32(Imm32(cond == Assembler::NotEqual), output);
    }

    masm.bind(&done);
}
开发者ID:nikhilgupta23，项目名称:gecko-dev，代码行数:26，代码来源:CodeGenerator-x86.cpp

示例3: emitCompare

bool
CodeGeneratorX86Shared::visitCompare(LCompare *comp)
{
    MCompare *mir = comp->mir();
    emitCompare(mir->compareType(), comp->left(), comp->right());
    masm.emitSet(JSOpToCondition(mir->compareType(), comp->jsop()), ToRegister(comp->output()));
    return true;
}
开发者ID:jonathanmarvens，项目名称:mozilla-central，代码行数:8，代码来源:CodeGenerator-x86-shared.cpp

示例4: ExtractLinearSum

bool
ion::ExtractLinearInequality(MTest *test, BranchDirection direction,
                             LinearSum *plhs, MDefinition **prhs, bool *plessEqual)
{
    if (!test->getOperand(0)->isCompare())
        return false;

    MCompare *compare = test->getOperand(0)->toCompare();

    MDefinition *lhs = compare->getOperand(0);
    MDefinition *rhs = compare->getOperand(1);

    if (compare->specialization() != MIRType_Int32)
        return false;

    JS_ASSERT(lhs->type() == MIRType_Int32);
    JS_ASSERT(rhs->type() == MIRType_Int32);

    JSOp jsop = compare->jsop();
    if (direction == FALSE_BRANCH)
        jsop = analyze::NegateCompareOp(jsop);

    LinearSum lsum = ExtractLinearSum(lhs);
    LinearSum rsum = ExtractLinearSum(rhs);

    if (!SafeSub(lsum.constant, rsum.constant, &lsum.constant))
        return false;

    // Normalize operations to use <= or >=.
    switch (jsop) {
      case JSOP_LE:
        *plessEqual = true;
        break;
      case JSOP_LT:
        /* x < y ==> x + 1 <= y */
        if (!SafeAdd(lsum.constant, 1, &lsum.constant))
            return false;
        *plessEqual = true;
        break;
      case JSOP_GE:
        *plessEqual = false;
        break;
      case JSOP_GT:
        /* x > y ==> x - 1 >= y */
        if (!SafeSub(lsum.constant, 1, &lsum.constant))
            return false;
        *plessEqual = false;
        break;
      default:
        return false;
    }

    *plhs = lsum;
    *prhs = rsum.term;

    return true;
}
开发者ID:rpearl，项目名称:ionmonkey-range-analysis，代码行数:57，代码来源:LICM.cpp

示例5: JSOpToCondition

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());
}
开发者ID:cliqz-oss，项目名称:browser-f，代码行数:13，代码来源:CodeGenerator-mips64.cpp

示例6: ToValue

void
CodeGeneratorX64::visitCompareBitwise(LCompareBitwise* lir)
{
    MCompare* mir = lir->mir();
    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.cmpPtr(lhs.valueReg(), rhs.valueReg());
    masm.emitSet(JSOpToCondition(mir->compareType(), mir->jsop()), output);
}
开发者ID:alphan102，项目名称:gecko-dev，代码行数:13，代码来源:CodeGenerator-x64.cpp

示例7: TryEliminateTypeBarrierFromTest

static void
TryEliminateTypeBarrierFromTest(MTypeBarrier *barrier, bool filtersNull, bool filtersUndefined,
                                MTest *test, BranchDirection direction, bool *eliminated)
{
    JS_ASSERT(filtersNull || filtersUndefined);

    // Watch for code patterns similar to 'if (x.f) { ... = x.f }'.  If x.f
    // is either an object or null/undefined, there will be a type barrier on
    // the latter read as the null/undefined value is never realized there.
    // The type barrier can be eliminated, however, by looking at tests
    // performed on the result of the first operation that filter out all
    // types that have been seen in the first access but not the second.

    // A test 'if (x.f)' filters both null and undefined.
    if (test->getOperand(0) == barrier->input() && direction == TRUE_BRANCH) {
        *eliminated = true;
        barrier->replaceAllUsesWith(barrier->input());
        return;
    }

    if (!test->getOperand(0)->isCompare())
        return;

    MCompare *compare = test->getOperand(0)->toCompare();
    MCompare::CompareType compareType = compare->compareType();

    if (compareType != MCompare::Compare_Undefined && compareType != MCompare::Compare_Null)
        return;
    if (compare->getOperand(0) != barrier->input())
        return;

    JSOp op = compare->jsop();
    JS_ASSERT(op == JSOP_EQ || op == JSOP_STRICTEQ ||
              op == JSOP_NE || op == JSOP_STRICTNE);

    if ((direction == TRUE_BRANCH) != (op == JSOP_NE || op == JSOP_STRICTNE))
        return;

    // A test 'if (x.f != null)' or 'if (x.f != undefined)' filters both null
    // and undefined. If strict equality is used, only the specified rhs is
    // tested for.
    if (op == JSOP_STRICTEQ || op == JSOP_STRICTNE) {
        if (compareType == MCompare::Compare_Undefined && !filtersUndefined)
            return;
        if (compareType == MCompare::Compare_Null && !filtersNull)
            return;
    }

    *eliminated = true;
    barrier->replaceAllUsesWith(barrier->input());
}
开发者ID:Web5design，项目名称:mozilla-central，代码行数:51，代码来源:IonAnalysis.cpp

示例8: ToValue

bool
CodeGeneratorX64::visitCompareV(LCompareV *lir)
{
    MCompare *mir = lir->mir();
    const ValueOperand lhs = ToValue(lir, LCompareV::LhsInput);
    const ValueOperand rhs = ToValue(lir, LCompareV::RhsInput);
    const Register output = ToRegister(lir->output());

    JS_ASSERT(IsEqualityOp(mir->jsop()));

    masm.cmpq(lhs.valueReg(), rhs.valueReg());
    masm.emitSet(JSOpToCondition(mir->compareType(), mir->jsop()), output);
    return true;
}
开发者ID:Nebelhom，项目名称:mozilla-central，代码行数:14，代码来源:CodeGenerator-x64.cpp

示例9: ToValue

void
CodeGeneratorX64::visitCompareVAndBranch(LCompareVAndBranch *lir)
{
    MCompare *mir = lir->cmpMir();

    const ValueOperand lhs = ToValue(lir, LCompareVAndBranch::LhsInput);
    const ValueOperand rhs = ToValue(lir, LCompareVAndBranch::RhsInput);

    MOZ_ASSERT(mir->jsop() == JSOP_EQ || mir->jsop() == JSOP_STRICTEQ ||
               mir->jsop() == JSOP_NE || mir->jsop() == JSOP_STRICTNE);

    masm.cmpPtr(lhs.valueReg(), rhs.valueReg());
    emitBranch(JSOpToCondition(mir->compareType(), mir->jsop()), lir->ifTrue(), lir->ifFalse());
}
开发者ID:stormandsun，项目名称:firefox，代码行数:14，代码来源:CodeGenerator-x64.cpp

示例10: JSOpToCondition

void
CodeGeneratorMIPS::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);

    MBasicBlock* notEqual = (cond == Assembler::Equal) ? lir->ifFalse() : lir->ifTrue();

    branchToBlock(lhs.typeReg(), rhs.typeReg(), notEqual, Assembler::NotEqual);
    emitBranch(lhs.payloadReg(), rhs.payloadReg(), cond, lir->ifTrue(), lir->ifFalse());
}
开发者ID:AlexOreshkevich，项目名称:mongo，代码行数:16，代码来源:CodeGenerator-mips32.cpp

示例11: MOZ_ASSERT

void
CodeGeneratorX64::visitCompare64AndBranch(LCompare64AndBranch* lir)
{
    MCompare* mir = lir->cmpMir();
    MOZ_ASSERT(mir->compareType() == MCompare::Compare_Int64 ||
               mir->compareType() == MCompare::Compare_UInt64);

    Register lhs = ToRegister(lir->getOperand(0));
    const LAllocation* rhs = lir->getOperand(1);

    if (rhs->isConstant())
        masm.cmpPtr(lhs, ImmWord(ToInt64(rhs)));
    else
        masm.cmpPtr(lhs, ToOperand(rhs));

    bool isSigned = mir->compareType() == MCompare::Compare_Int64;
    emitBranch(JSOpToCondition(lir->jsop(), isSigned), lir->ifTrue(), lir->ifFalse());
}
开发者ID:cclauss，项目名称:gecko-dev，代码行数:18，代码来源:CodeGenerator-x64.cpp

示例12: ToValue

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());
}
开发者ID:cliqz-oss，项目名称:browser-f，代码行数:19，代码来源:CodeGenerator-mips64.cpp

示例13: MOZ_ASSERT

void
CodeGeneratorX64::visitCompareI64AndBranch(LCompareI64AndBranch* lir)
{
    MCompare* mir = lir->cmpMir();
    MOZ_ASSERT(mir->compareType() == MCompare::Compare_Int64 ||
               mir->compareType() == MCompare::Compare_UInt64);

    LInt64Allocation lhs = lir->getInt64Operand(LCompareI64::Lhs);
    LInt64Allocation rhs = lir->getInt64Operand(LCompareI64::Rhs);
    Register lhsReg = ToRegister64(lhs).reg;

    if (IsConstant(rhs))
        masm.cmpPtr(lhsReg, ImmWord(ToInt64(rhs)));
    else
        masm.cmpPtr(lhsReg, ToOperand64(rhs));

    bool isSigned = mir->compareType() == MCompare::Compare_Int64;
    emitBranch(JSOpToCondition(lir->jsop(), isSigned), lir->ifTrue(), lir->ifFalse());
}
开发者ID:alphan102，项目名称:gecko-dev，代码行数:19，代码来源:CodeGenerator-x64.cpp

示例14: JSOpToCondition

bool
CodeGeneratorX86::visitCompareVAndBranch(LCompareVAndBranch *lir)
{
    MCompare *mir = lir->mir();
    Assembler::Condition cond = JSOpToCondition(mir->jsop());
    const ValueOperand lhs = ToValue(lir, LCompareVAndBranch::LhsInput);
    const ValueOperand rhs = ToValue(lir, LCompareVAndBranch::RhsInput);

    JS_ASSERT(mir->jsop() == JSOP_EQ || mir->jsop() == JSOP_STRICTEQ ||
              mir->jsop() == JSOP_NE || mir->jsop() == JSOP_STRICTNE);

    Label *notEqual;
    if (cond == Assembler::Equal)
        notEqual = lir->ifFalse()->lir()->label();
    else
        notEqual = lir->ifTrue()->lir()->label();

    masm.cmp32(lhs.typeReg(), rhs.typeReg());
    masm.j(Assembler::NotEqual, notEqual);
    masm.cmp32(lhs.payloadReg(), rhs.payloadReg());
    emitBranch(cond, lir->ifTrue(), lir->ifFalse());

    return true;
}
开发者ID:kls88，项目名称:Spidermonkey，代码行数:24，代码来源:CodeGenerator-x86.cpp

示例15: ToValue

void
CodeGeneratorX86::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);

    Assembler::Condition cond = masm.testBoolean(Assembler::NotEqual, lhs);
    jumpToBlock((mir->jsop() == JSOP_STRICTEQ) ? lir->ifFalse() : lir->ifTrue(), cond);

    if (rhs->isConstant())
        masm.cmp32(lhs.payloadReg(), Imm32(rhs->toConstant()->toBoolean()));
    else
        masm.cmp32(lhs.payloadReg(), ToRegister(rhs));
    emitBranch(JSOpToCondition(mir->compareType(), mir->jsop()), lir->ifTrue(), lir->ifFalse());
}
开发者ID:nikhilgupta23，项目名称:gecko-dev，代码行数:18，代码来源:CodeGenerator-x86.cpp


注：本文中的MCompare类示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。