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85 lines
3.6 KiB
Java
85 lines
3.6 KiB
Java
/*
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* Copyright (c) 2025, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/**
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* @test
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* @bug 8351515
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* @summary The compiler must not fold `0-(0-x)` for x: float | double
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* @library /test/lib /
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* @modules jdk.incubator.vector
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* @run driver compiler.floatingpoint.TestSubNodeFloatDoubleNegation
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*/
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package compiler.floatingpoint;
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import compiler.lib.ir_framework.*;
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import jdk.incubator.vector.Float16;
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import jdk.test.lib.Asserts;
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public class TestSubNodeFloatDoubleNegation {
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public static void main(String[] args) {
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TestFramework.runWithFlags("--add-modules=jdk.incubator.vector", "-XX:CompileCommand=inline,jdk.incubator.vector.Float16::*");
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}
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@Run(test = { "testHalfFloat", "testFloat", "testDouble" })
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public static void assertResults() {
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short halfFloatRes = Float16.float16ToShortBits(testHalfFloat(Float16.valueOf(-0.0f)));
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int floatRes = Float.floatToIntBits(testFloat(-0.0f));
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long doubleRes = Double.doubleToLongBits(testDouble(-0.0));
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Asserts.assertEQ((short) 0, halfFloatRes);
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Asserts.assertEQ((int) 0, floatRes);
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Asserts.assertEQ((long) 0, doubleRes);
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}
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@Test
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@IR(counts = { IRNode.SUB, "2" }, applyIfPlatform = {"x64", "true"}, applyIfCPUFeature = {"avx512_fp16", "false"})
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@IR(counts = { IRNode.SUB_HF, "2" }, applyIfPlatform = {"x64", "true"}, applyIfCPUFeature = {"avx512_fp16", "true"})
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@IR(counts = { IRNode.SUB, "2" }, applyIfPlatform = {"aarch64", "true"}, applyIfCPUFeatureAnd = {"fphp", "false", "asimdhp", "false"})
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@IR(counts = { IRNode.SUB_HF, "2" }, applyIfPlatform = {"aarch64", "true"}, applyIfCPUFeatureAnd = {"fphp", "true", "asimdhp", "true"})
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@IR(counts = { IRNode.SUB, "2" }, applyIfPlatform = {"riscv64", "true"}, applyIfCPUFeature = {"zfh", "false"})
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@IR(counts = { IRNode.SUB_HF, "2" }, applyIfPlatform = {"riscv64", "true"}, applyIfCPUFeature = {"zfh", "true"})
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@IR(counts = { IRNode.SUB, "2" }, applyIfPlatformAnd = {"x64", "false", "aarch64", "false", "riscv64", "false"})
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// Checks that the subtractions in 0 - (0 - hf) do not get eliminiated
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public static Float16 testHalfFloat(Float16 hf) {
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return Float16.subtract(
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Float16.shortBitsToFloat16((short) 0),
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Float16.subtract(Float16.shortBitsToFloat16((short) 0), hf));
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}
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@Test
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@IR(counts = { IRNode.SUB_F, "2" })
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// Checks that the subtractions in 0 - (0 - f) do not get eliminated
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public static float testFloat(float f) {
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return 0 - (0 - f);
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}
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@Test
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@IR(counts = { IRNode.SUB_D, "2" })
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// Checks that the subtractions in 0 - (0 - d) do not get eliminated
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public static double testDouble(double d) {
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return 0 - (0 - d);
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}
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}
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