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/*
* Copyright (c) 2015, 2025, 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.
*/
/**
* @test
* @bug 8074981
* @summary Add C2 x86 Superword support for scalar sum reduction optimizations : double test
* @library /test/lib /
* @run driver compiler.loopopts.superword.SumRed_Double
*/
package compiler.loopopts.superword;
import compiler.lib.ir_framework.*;
public class SumRed_Double {
public static void main(String[] args) throws Exception {
TestFramework framework = new TestFramework();
framework.addFlags("-XX:+IgnoreUnrecognizedVMOptions",
"-XX:LoopUnrollLimit=250",
"-XX:CompileThresholdScaling=0.1");
int i = 0;
Scenario[] scenarios = new Scenario[6];
for (String reductionSign : new String[] {"+", "-"}) {
for (int maxUnroll : new int[] {4, 8, 16}) {
scenarios[i] = new Scenario(i, "-XX:" + reductionSign + "SuperWordReductions",
"-XX:LoopMaxUnroll=" + maxUnroll);
i++;
}
}
framework.addScenarios(scenarios);
framework.start();
}
@Run(test = {"sumReductionImplement",
"sumReductionWithStoreImplement"},
mode = RunMode.STANDALONE)
public static void runTests() throws Exception {
double[] a = new double[256 * 1024];
double[] b = new double[256 * 1024];
double[] c = new double[256 * 1024];
double[] d = new double[256 * 1024];
sumReductionInit(a, b, c);
double total = 0;
double valid = 3.6028590866691944E19;
for (int j = 0; j < 2000; j++) {
total = sumReductionImplement(a, b, c, total);
}
testCorrectness(total, valid, "sumReduction");
total = 0;
for (int j = 0; j < 2000; j++) {
total = sumReductionWithStoreImplement(a, b, c, d, total);
}
testCorrectness(total, valid, "sumReductionWithStore");
}
public static void sumReductionInit(
double[] a,
double[] b,
double[] c) {
for (int j = 0; j < 1; j++) {
for (int i = 0; i < a.length; i++) {
a[i] = i * 1 + j;
b[i] = i * 1 - j;
c[i] = i + j;
}
}
}
/* Vectorization is expected but not enabled.
A positive IR rule should be added later. */
@Test
@IR(applyIf = {"SuperWordReductions", "false"},
failOn = {IRNode.ADD_REDUCTION_VD})
public static double sumReductionImplement(
double[] a,
double[] b,
double[] c,
double total) {
for (int i = 0; i < a.length; i++) {
total += (a[i] * b[i]) + (a[i] * c[i]) + (b[i] * c[i]);
}
return total;
}
@Test
@IR(applyIf = {"SuperWordReductions", "false"},
failOn = {IRNode.ADD_REDUCTION_VD})
@IR(applyIfCPUFeature = {"sse2", "true"},
applyIfAnd = {"SuperWordReductions", "true", "LoopMaxUnroll", ">= 8"},
counts = {IRNode.ADD_REDUCTION_VD, ">= 1"})
@IR(applyIfPlatform = {"riscv64", "true"},
applyIfCPUFeature = {"rvv", "true"},
applyIfAnd = {"SuperWordReductions", "true", "LoopMaxUnroll", ">= 8"},
counts = {IRNode.ADD_REDUCTION_VD, ">= 1"})
public static double sumReductionWithStoreImplement(
double[] a,
double[] b,
double[] c,
double[] d,
double total) {
for (int i = 0; i < a.length; i++) {
d[i] = (a[i] * b[i]) + (a[i] * c[i]) + (b[i] * c[i]);
total += d[i];
}
return total;
}
public static void testCorrectness(
double total,
double valid,
String op) throws Exception {
if (total != valid) {
throw new Exception(
"Invalid total: " + total + " " +
"Expected value = " + valid + " " + op + ": Failed");
}
}
}
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