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/*
* Copyright (c) 2023, 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 8302976
* @summary Verify conversion cons between float and the binary16 format
* @requires (vm.cpu.features ~= ".*avx512vl.*" | vm.cpu.features ~= ".*f16c.*") | os.arch=="aarch64"
* | ((os.arch == "ppc64" | os.arch == "ppc64le") & vm.cpu.features ~= ".*darn.*")
* @requires vm.compiler1.enabled & vm.compiler2.enabled
* @requires vm.compMode != "Xcomp"
* @comment default run:
* @run main TestConstFloat16ToFloat
* @comment C1 JIT compilation only:
* @run main/othervm -Xcomp -XX:CompileCommand=compileonly,TestConstFloat16ToFloat::test* -XX:TieredStopAtLevel=1 TestConstFloat16ToFloat
* @comment C2 JIT compilation only:
* @run main/othervm -Xcomp -XX:CompileCommand=compileonly,TestConstFloat16ToFloat::test* -XX:-TieredCompilation TestConstFloat16ToFloat
*/
public class TestConstFloat16ToFloat {
public static class Binary16 {
public static final short POSITIVE_INFINITY = (short)0x7c00;
public static final short MAX_VALUE = 0x7bff;
public static final short ONE = 0x3c00;
public static final short MIN_NORMAL = 0x0400;
public static final short MAX_SUBNORMAL = 0x03ff;
public static final short MIN_VALUE = 0x0001;
public static final short POSITIVE_ZERO = 0x0000;
}
static final short[] sCon = {
Short.MIN_VALUE,
Short.MIN_VALUE + 1,
-1,
0,
+1,
Short.MAX_VALUE - 1,
Short.MAX_VALUE,
Binary16.MIN_VALUE,
Binary16.MIN_NORMAL,
Binary16.POSITIVE_ZERO,
Binary16.ONE,
Binary16.MAX_VALUE,
Binary16.MAX_SUBNORMAL,
Binary16.POSITIVE_INFINITY
};
public final static class BinaryF16 {
public static final float POSITIVE_INFINITY = Float.POSITIVE_INFINITY;
public static final float MAX_VALUE = 65504.0f;
public static final float ONE = 1.0f;
public static final float MIN_NORMAL = 0x1.0p-14f;
public static final float MAX_SUBNORMAL = 0x1.ff8p-15f;
public static final float MIN_VALUE = 0x1.0p-24f;
public static final float POSITIVE_ZERO = +0x0f;
}
static float[] fCon = {
0.0f - BinaryF16.POSITIVE_INFINITY,
0.0f - BinaryF16.MAX_VALUE,
0.0f - BinaryF16.MAX_SUBNORMAL,
0.0f - BinaryF16.MIN_VALUE,
0.0f - BinaryF16.MIN_NORMAL,
-1.0f,
-0.0f,
BinaryF16.MIN_VALUE,
BinaryF16.MIN_NORMAL,
BinaryF16.POSITIVE_ZERO,
BinaryF16.ONE,
BinaryF16.MAX_VALUE,
BinaryF16.MAX_SUBNORMAL,
BinaryF16.POSITIVE_INFINITY
};
// Testing some constant values (optimized by C2).
public static void testFloat16Const(float[] fRes) {
fRes[ 0] = Float.float16ToFloat(Short.MIN_VALUE);
fRes[ 1] = Float.float16ToFloat((short)(Short.MIN_VALUE + 1));
fRes[ 2] = Float.float16ToFloat((short)-1);
fRes[ 3] = Float.float16ToFloat((short)0);
fRes[ 4] = Float.float16ToFloat((short)+1);
fRes[ 5] = Float.float16ToFloat((short)(Short.MAX_VALUE - 1));
fRes[ 6] = Float.float16ToFloat(Short.MAX_VALUE);
fRes[ 7] = Float.float16ToFloat(Binary16.MIN_VALUE);
fRes[ 8] = Float.float16ToFloat(Binary16.MIN_NORMAL);
fRes[ 9] = Float.float16ToFloat(Binary16.POSITIVE_ZERO);
fRes[10] = Float.float16ToFloat(Binary16.ONE);
fRes[11] = Float.float16ToFloat(Binary16.MAX_VALUE);
fRes[12] = Float.float16ToFloat(Binary16.MAX_SUBNORMAL);
fRes[13] = Float.float16ToFloat(Binary16.POSITIVE_INFINITY);
}
public static void testFloatConst(short[] sRes) {
sRes[ 0] = Float.floatToFloat16(0.0f - BinaryF16.POSITIVE_INFINITY);
sRes[ 1] = Float.floatToFloat16(0.0f - BinaryF16.MAX_VALUE);
sRes[ 2] = Float.floatToFloat16(0.0f - BinaryF16.MAX_SUBNORMAL);
sRes[ 3] = Float.floatToFloat16(0.0f - BinaryF16.MIN_VALUE);
sRes[ 4] = Float.floatToFloat16(0.0f - BinaryF16.MIN_NORMAL);
sRes[ 5] = Float.floatToFloat16(-1.0f);
sRes[ 6] = Float.floatToFloat16(-0.0f);
sRes[ 7] = Float.floatToFloat16(BinaryF16.MIN_VALUE);
sRes[ 8] = Float.floatToFloat16(BinaryF16.MIN_NORMAL);
sRes[ 9] = Float.floatToFloat16(BinaryF16.POSITIVE_ZERO);
sRes[10] = Float.floatToFloat16(BinaryF16.ONE);
sRes[11] = Float.floatToFloat16(BinaryF16.MAX_VALUE);
sRes[12] = Float.floatToFloat16(BinaryF16.MAX_SUBNORMAL);
sRes[13] = Float.floatToFloat16(BinaryF16.POSITIVE_INFINITY);
}
public static int run() {
int errors = 0;
short s = Float.floatToFloat16(0.0f); // Load Float class
// Testing constant float16 values.
float[] fRes = new float[sCon.length];
testFloat16Const(fRes);
for (int i = 0; i < sCon.length; i++) {
float fVal = Float.float16ToFloat(sCon[i]);
if (Float.floatToRawIntBits(fRes[i]) != Float.floatToRawIntBits(fVal)) {
errors++;
String cVal_hex = Integer.toHexString(sCon[i] & 0xffff);
String fRes_hex = Integer.toHexString(Float.floatToRawIntBits(fRes[i]));
String fVal_hex = Integer.toHexString(Float.floatToRawIntBits(fVal));
System.out.println("Inconsistent result for Float.float16ToFloat(" + cVal_hex + "): " +
fRes[i] + "/" + fRes_hex + " != " + fVal + "/" + fVal_hex);
}
}
// Testing constant float values.
short[] sRes = new short[fCon.length];
testFloatConst(sRes);
for (int i = 0; i < fCon.length; i++) {
short sVal = Float.floatToFloat16(fCon[i]);
if (sRes[i] != sVal) {
errors++;
String cVal_hex = Integer.toHexString(Float.floatToRawIntBits(fCon[i]));
String sRes_hex = Integer.toHexString(sRes[i] & 0xffff);
String sVal_hex = Integer.toHexString(sVal & 0xffff);
System.out.println("Inconsistent result for Float.floatToFloat16(" + fCon[i] + "/" + cVal_hex + "): " +
sRes_hex + "(" + sRes + ")" + " != " + sVal_hex + "(" + sVal + ")");
}
}
return errors;
}
public static void main(String[] args) {
int errors = 0;
// Run twice to trigger compilation
for (int i = 0; i < 2; i++) {
errors += run();
}
if (errors > 0) {
throw new RuntimeException(errors + " errors");
}
}
}
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