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>
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;
+    }
+}