| /* |
| * Copyright (c) 1997, 2005, 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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. |
| */ |
| |
| #include "jni.h" |
| #include "jvm.h" |
| |
| #include <nativehelper/JNIHelp.h> |
| |
| #define NATIVE_METHOD(className, functionName, signature) \ |
| { #functionName, signature, (void*)(className ## _ ## functionName) } |
| |
| |
| /* |
| * Find the float corresponding to a given bit pattern |
| */ |
| JNIEXPORT jfloat JNICALL |
| Float_intBitsToFloat(JNIEnv *env, jclass unused, jint v) |
| { |
| union { |
| int i; |
| float f; |
| } u; |
| u.i = (long)v; |
| return (jfloat)u.f; |
| } |
| |
| /* |
| * Find the bit pattern corresponding to a given float, NOT collapsing NaNs |
| */ |
| JNIEXPORT jint JNICALL |
| Float_floatToRawIntBits(JNIEnv *env, jclass unused, jfloat v) |
| { |
| union { |
| int i; |
| float f; |
| } u; |
| u.f = (float)v; |
| return (jint)u.i; |
| } |
| static JNINativeMethod gMethods[] = { |
| NATIVE_METHOD(Float, intBitsToFloat, "(I)F"), |
| NATIVE_METHOD(Float, floatToRawIntBits, "(F)I"), |
| }; |
| |
| void register_java_lang_Float(JNIEnv* env) { |
| jniRegisterNativeMethods(env, "java/lang/Float", gMethods, NELEM(gMethods)); |
| } |