Quelle BMI2.java Sprache: JAVA

/*
* Copyright (c) 2021, 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
* @summary Support BMI2 instructions on x86/x64
*
* @run main/othervm -Xbatch -XX:-TieredCompilation -XX:+UnlockDiagnosticVMOptions -XX:+AbortVMOnCompilationFailure
*      -XX:CompileCommand=dontinline,compiler.codegen.BMI2$BMITests::*
*      compiler.codegen.BMI2
*/

package compiler.codegen;

public class BMI2 {
    private final static int ITERATIONS = 30000;

    // match(Set dst (ConvI2L (AndI src1 mask)))
    public static void testBzhiI2L(int ix) {
        long[] goldv = new long[16];
        for (int i = 0; i <= 15; i++) {
              goldv[i] = BMITests.bzhiI2L(ix, i);
        }
        for (int i2 = 0; i2 < ITERATIONS; i2++) {
             for (int i = 0; i <= 15; i++) {
                  long v = BMITests.bzhiI2L(ix, i);
                  if (v != goldv[i]) {
                          throw new Error(returnBzhiI2LErrMessage (goldv[i], v));
                  }
             }
       }
    }

    private static String returnBzhiI2LErrMessage (long value, long value2) {
        return "bzhi I2L with register failed, uncompiled result: " + value + " does not match compiled result: " + value2;
    }

    static class BMITests {

        static long bzhiI2L(int src1, int src2) {

            switch(src2) {
                case 0:
                    return (long)(src1 & 0x1);
                case 1:
                    return (long)(src1 & 0x3);
                case 2:
                    return (long)(src1 & 0x7);
                case 3:
                    return (long)(src1 & 0xF);
                case 4:
                    return (long)(src1 & 0x1F);
                case 5:
                    return (long)(src1 & 0x3F);
                case 6:
                    return (long)(src1 & 0x7F);
                case 7:
                    return (long)(src1 & 0xFF);
                case 8:
                    return (long)(src1 & 0x1FF);
                case 9:
                    return (long)(src1 & 0x3FF);
                case 10:
                    return (long)(src1 & 0x7FF);
                case 11:
                    return (long)(src1 & 0xFFF);
                case 12:
                    return (long)(src1 & 0x1FFF);
                case 13:
                    return (long)(src1 & 0x3FFF);
                case 14:
                    return (long)(src1 & 0x7FFF);
                case 15:
                    return (long)(src1 & 0xFFFF);
                default:
                    return (long)(src1 & 0xFFFF);
            }
        }
    }

    public static void main(String[] args) {
        testBzhiI2L(0);
        testBzhiI2L(1);
    }
}

quality89%

¤ Dauer der Verarbeitung: 0.1 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.