| /* |
| * Copyright (c) 2013, 2015, 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.aarch64; |
| |
| import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.CONST; |
| import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG; |
| import static org.graalvm.compiler.lir.LIRValueUtil.asJavaConstant; |
| import static org.graalvm.compiler.lir.LIRValueUtil.isJavaConstant; |
| import static jdk.vm.ci.code.ValueUtil.asRegister; |
| import static jdk.vm.ci.code.ValueUtil.isRegister; |
| |
| import org.graalvm.compiler.asm.NumUtil; |
| import org.graalvm.compiler.asm.aarch64.AArch64Assembler; |
| import org.graalvm.compiler.asm.aarch64.AArch64MacroAssembler; |
| import org.graalvm.compiler.core.common.calc.Condition; |
| import org.graalvm.compiler.debug.GraalError; |
| import org.graalvm.compiler.lir.LIRInstructionClass; |
| import org.graalvm.compiler.lir.asm.CompilationResultBuilder; |
| |
| import jdk.vm.ci.aarch64.AArch64Kind; |
| import jdk.vm.ci.meta.JavaConstant; |
| import jdk.vm.ci.meta.Value; |
| |
| public class AArch64Compare { |
| |
| public static class CompareOp extends AArch64LIRInstruction { |
| public static final LIRInstructionClass<CompareOp> TYPE = LIRInstructionClass.create(CompareOp.class); |
| |
| @Use protected Value x; |
| @Use({REG, CONST}) protected Value y; |
| |
| public CompareOp(Value x, Value y) { |
| super(TYPE); |
| assert ((AArch64Kind) x.getPlatformKind()).isInteger() && ((AArch64Kind) y.getPlatformKind()).isInteger(); |
| assert x.getPlatformKind() == y.getPlatformKind(); |
| this.x = x; |
| this.y = y; |
| } |
| |
| @Override |
| public void emitCode(CompilationResultBuilder crb, AArch64MacroAssembler masm) { |
| gpCompare(masm, x, y); |
| } |
| } |
| |
| /** |
| * Compares integer values x and y. |
| * |
| * @param x integer value to compare. May not be null. |
| * @param y integer value to compare. May not be null. |
| */ |
| public static void gpCompare(AArch64MacroAssembler masm, Value x, Value y) { |
| final int size = x.getPlatformKind().getSizeInBytes() * Byte.SIZE; |
| if (isRegister(y)) { |
| masm.cmp(size, asRegister(x), asRegister(y)); |
| } else { |
| JavaConstant constant = asJavaConstant(y); |
| if (constant.isDefaultForKind()) { |
| masm.cmp(size, asRegister(x), 0); |
| } else { |
| final long longValue = constant.asLong(); |
| assert NumUtil.isInt(longValue); |
| int maskedValue; |
| switch (constant.getJavaKind()) { |
| case Boolean: |
| case Byte: |
| maskedValue = (int) (longValue & 0xFF); |
| break; |
| case Char: |
| case Short: |
| maskedValue = (int) (longValue & 0xFFFF); |
| break; |
| case Int: |
| case Long: |
| maskedValue = (int) longValue; |
| break; |
| default: |
| throw GraalError.shouldNotReachHere(); |
| } |
| masm.cmp(size, asRegister(x), maskedValue); |
| } |
| } |
| } |
| |
| public static class FloatCompareOp extends AArch64LIRInstruction { |
| public static final LIRInstructionClass<FloatCompareOp> TYPE = LIRInstructionClass.create(FloatCompareOp.class); |
| |
| @Use protected Value x; |
| @Use({REG, CONST}) protected Value y; |
| private final Condition condition; |
| private final boolean unorderedIsTrue; |
| |
| public FloatCompareOp(Value x, Value y, Condition condition, boolean unorderedIsTrue) { |
| super(TYPE); |
| assert !isJavaConstant(y) || isFloatCmpConstant(y, condition, unorderedIsTrue); |
| this.x = x; |
| this.y = y; |
| this.condition = condition; |
| this.unorderedIsTrue = unorderedIsTrue; |
| } |
| |
| /** |
| * Checks if val can be used as a constant for the gpCompare operation or not. |
| */ |
| public static boolean isFloatCmpConstant(Value val, Condition condition, boolean unorderedIsTrue) { |
| // If the condition is "EQ || unordered" or "NE && unordered" we have to use 2 registers |
| // in any case. |
| if (!(condition == Condition.EQ && unorderedIsTrue || condition == Condition.NE && !unorderedIsTrue)) { |
| return false; |
| } |
| return isJavaConstant(val) && asJavaConstant(val).isDefaultForKind(); |
| } |
| |
| @Override |
| public void emitCode(CompilationResultBuilder crb, AArch64MacroAssembler masm) { |
| assert isRegister(x); |
| int size = x.getPlatformKind().getSizeInBytes() * Byte.SIZE; |
| if (isRegister(y)) { |
| masm.fcmp(size, asRegister(x), asRegister(y)); |
| // There is no condition code for "EQ || unordered" nor one for "NE && unordered", |
| // so we have to fix them up ourselves. |
| // In both cases we combine the asked for condition into the EQ, respectively NE |
| // condition, i.e. |
| // if EQ && unoreredIsTrue, then the EQ flag will be set if the two values gpCompare |
| // unequal but are |
| // unordered. |
| if (condition == Condition.EQ && unorderedIsTrue) { |
| // if f1 ordered f2: |
| // result = f1 == f2 |
| // else: |
| // result = EQUAL |
| int nzcv = 0b0100; // EQUAL -> Z = 1 |
| masm.fccmp(size, asRegister(x), asRegister(y), nzcv, AArch64Assembler.ConditionFlag.VC); |
| } else if (condition == Condition.NE && !unorderedIsTrue) { |
| // if f1 ordered f2: |
| // result = f1 != f2 |
| // else: |
| // result = !NE == EQUAL |
| int nzcv = 0b0100; // EQUAL -> Z = 1 |
| masm.fccmp(size, asRegister(x), asRegister(y), nzcv, AArch64Assembler.ConditionFlag.VC); |
| } |
| } else { |
| // cmp against +0.0 |
| masm.fcmpZero(size, asRegister(x)); |
| } |
| } |
| |
| @Override |
| public void verify() { |
| assert x.getPlatformKind().equals(y.getPlatformKind()) : "a: " + x + " b: " + y; |
| } |
| } |
| |
| } |