JDK14/Java14源码在线阅读

/*
 * Copyright (c) 2013, 2019, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */


package org.graalvm.compiler.lir.gen;

import org.graalvm.compiler.core.common.LIRKind;
import org.graalvm.compiler.core.common.calc.FloatConvert;
import org.graalvm.compiler.debug.GraalError;
import org.graalvm.compiler.lir.LIRFrameState;
import org.graalvm.compiler.lir.Variable;

import jdk.vm.ci.meta.Value;
import jdk.vm.ci.meta.ValueKind;

/**
 * This interface can be used to generate LIR for arithmetic and simple memory access operations.
 *
 * The setFlags flag in emitAdd, emitSub and emitMul indicates, that the instruction must set the
 * flags register to be used for a later branch. (On AMD64, the condition codes are set in every
 * arithmetic instruction, but other architectures optionally set the flags register) If setFlags is
 * set, the instruction must set the flags register; if false, the instruction may or may not set
 * the flags register.
 */
public interface ArithmeticLIRGeneratorTool {

    Value emitNegate(Value input);

    Value emitAdd(Value a, Value b, boolean setFlags);

    Value emitSub(Value a, Value b, boolean setFlags);

    Value emitMul(Value a, Value b, boolean setFlags);

    Value emitMulHigh(Value a, Value b);

    Value emitUMulHigh(Value a, Value b);

    Value emitDiv(Value a, Value b, LIRFrameState state);

    Value emitRem(Value a, Value b, LIRFrameState state);

    Value emitUDiv(Value a, Value b, LIRFrameState state);

    Value emitURem(Value a, Value b, LIRFrameState state);

    Value emitNot(Value input);

    Value emitAnd(Value a, Value b);

    Value emitOr(Value a, Value b);

    Value emitXor(Value a, Value b);

    Value emitShl(Value a, Value b);

    Value emitShr(Value a, Value b);

    Value emitUShr(Value a, Value b);

    Value emitFloatConvert(FloatConvert op, Value inputVal);

    Value emitReinterpret(LIRKind to, Value inputVal);

    Value emitNarrow(Value inputVal, int bits);

    Value emitSignExtend(Value inputVal, int fromBits, int toBits);

    Value emitZeroExtend(Value inputVal, int fromBits, int toBits);

    Value emitMathAbs(Value input);

    Value emitMathSqrt(Value input);

    Value emitBitCount(Value operand);

    Value emitBitScanForward(Value operand);

    Value emitBitScanReverse(Value operand);

    Variable emitLoad(LIRKind kind, Value address, LIRFrameState state);

    void emitStore(ValueKind<?> kind, Value address, Value input, LIRFrameState state);

    @SuppressWarnings("unused")
    default Value emitFusedMultiplyAdd(Value a, Value b, Value c) {
        throw GraalError.unimplemented("No specialized implementation available");
    }

    @SuppressWarnings("unused")
    default Value emitMathLog(Value input, boolean base10) {
        throw GraalError.unimplemented("No specialized implementation available");
    }

    @SuppressWarnings("unused")
    default Value emitMathCos(Value input) {
        throw GraalError.unimplemented("No specialized implementation available");
    }

    @SuppressWarnings("unused")
    default Value emitMathSin(Value input) {
        throw GraalError.unimplemented("No specialized implementation available");
    }

    @SuppressWarnings("unused")

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