Mercurial > hg > truffle
diff graal/com.oracle.graal.snippets/src/com/oracle/graal/snippets/FloatSubstitutions.java @ 7356:fe9f252f0d05
renamings to clarify the difference between lowering/stub snippets and substitution snippets (the end goal is to remove the term 'snippet' from the latter altogether)
author | Doug Simon <doug.simon@oracle.com> |
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date | Sat, 12 Jan 2013 21:43:12 +0100 |
parents | graal/com.oracle.graal.snippets/src/com/oracle/graal/snippets/FloatSnippets.java@8c163cfda1e5 |
children |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/com.oracle.graal.snippets/src/com/oracle/graal/snippets/FloatSubstitutions.java Sat Jan 12 21:43:12 2013 +0100 @@ -0,0 +1,59 @@ +/* + * Copyright (c) 2011, 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 com.oracle.graal.snippets; + +import com.oracle.graal.nodes.calc.*; +import com.oracle.graal.snippets.ClassSubstitution.*; + +/** + * Substitutions for {@link java.lang.Float} methods. + */ +@ClassSubstitution(java.lang.Float.class) +public class FloatSubstitutions { + + private static final int NAN_RAW_INT_BITS = Float.floatToRawIntBits(Float.NaN); + + @MethodSubstitution + public static int floatToRawIntBits(float value) { + @JavacBug(id = 6995200) + Integer result = ConvertNode.convert(ConvertNode.Op.MOV_F2I, value); + return result; + } + + // TODO This method is not necessary, since the JDK method does exactly this + @MethodSubstitution + public static int floatToIntBits(float value) { + if (value != value) { + return NAN_RAW_INT_BITS; + } else { + return floatToRawIntBits(value); + } + } + + @MethodSubstitution + public static float intBitsToFloat(int bits) { + @JavacBug(id = 6995200) + Float result = ConvertNode.convert(ConvertNode.Op.MOV_I2F, bits); + return result; + } +}