org.jetbrains.kotlin.codegen.intrinsics.BinaryOp.kt Maven / Gradle / Ivy

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/*
 * Copyright 2010-2015 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.jetbrains.kotlin.codegen.intrinsics

import org.jetbrains.kotlin.codegen.AsmUtil.numberFunctionOperandType
import org.jetbrains.kotlin.codegen.Callable
import org.jetbrains.kotlin.codegen.CallableMethod
import org.jetbrains.kotlin.codegen.StackValue
import org.jetbrains.org.objectweb.asm.Opcodes.ISHL
import org.jetbrains.org.objectweb.asm.Opcodes.ISHR
import org.jetbrains.org.objectweb.asm.Opcodes.IUSHR
import org.jetbrains.org.objectweb.asm.Type

class BinaryOp(private val opcode: Int) : IntrinsicMethod() {
    private fun shift(): Boolean =
            opcode == ISHL || opcode == ISHR || opcode == IUSHR

    override fun toCallable(method: CallableMethod): Callable {
        val returnType = method.returnType
        assert(method.getValueParameters().size == 1)

        val arg0Type: Type
        val arg1Type: Type
        val intermediateResultType: Type

        if (method.owner != Type.CHAR_TYPE) {
            intermediateResultType = numberFunctionOperandType(returnType)
            arg0Type = intermediateResultType
            arg1Type = if (shift()) Type.INT_TYPE else arg0Type
        }
        else {
            arg0Type = Type.CHAR_TYPE
            arg1Type = method.getValueParameters()[0].asmType
            intermediateResultType = numberFunctionOperandType(returnType)
        }

        return createBinaryIntrinsicCallable(returnType, arg1Type, arg0Type) { v ->
            v.visitInsn(returnType.getOpcode(opcode))
            StackValue.coerce(intermediateResultType, returnType, v)
        }
    }
}