151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski/* 251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Copyright (c) 1997, 2005, Oracle and/or its affiliates. All rights reserved. 351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * This code is free software; you can redistribute it and/or modify it 651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * under the terms of the GNU General Public License version 2 only, as 751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * published by the Free Software Foundation. Oracle designates this 851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * particular file as subject to the "Classpath" exception as provided 951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * by Oracle in the LICENSE file that accompanied this code. 1051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 1151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * This code is distributed in the hope that it will be useful, but WITHOUT 1251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 1451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * version 2 for more details (a copy is included in the LICENSE file that 1551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * accompanied this code). 1651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 1751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * You should have received a copy of the GNU General Public License version 1851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 2 along with this work; if not, write to the Free Software Foundation, 1951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 2051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 2151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 2251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * or visit www.oracle.com if you need additional information or have any 2351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * questions. 2451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 2551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 2651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski#include "jni.h" 2751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski#include "jni_util.h" 2851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski#include "jlong.h" 2951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski#include "jvm.h" 3051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 3146e3649f898305d185fc40bae2542e933a16b619Piotr Jastrzebski#include "JNIHelp.h" 3246e3649f898305d185fc40bae2542e933a16b619Piotr Jastrzebski 3346e3649f898305d185fc40bae2542e933a16b619Piotr Jastrzebski#define NATIVE_METHOD(className, functionName, signature) \ 3446e3649f898305d185fc40bae2542e933a16b619Piotr Jastrzebski{ #functionName, signature, (void*)(className ## _ ## functionName) } 3546e3649f898305d185fc40bae2542e933a16b619Piotr Jastrzebski 3651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 3751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski/* 3851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Find the double float corresponding to a given bit pattern 3951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 4051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr JastrzebskiJNIEXPORT jdouble JNICALL 4146e3649f898305d185fc40bae2542e933a16b619Piotr JastrzebskiDouble_longBitsToDouble(JNIEnv *env, jclass unused, jlong v) 4251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski{ 4351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski union { 4451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski jlong l; 4551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski double d; 4651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } u; 4751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski jlong_to_jdouble_bits(&v); 4851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski u.l = v; 4951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski return (jdouble)u.d; 5051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski} 5151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 5251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski/* 5351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Find the bit pattern corresponding to a given double float, NOT collapsing NaNs 5451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 5551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr JastrzebskiJNIEXPORT jlong JNICALL 5646e3649f898305d185fc40bae2542e933a16b619Piotr JastrzebskiDouble_doubleToRawLongBits(JNIEnv *env, jclass unused, jdouble v) 5751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski{ 5851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski union { 5951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski jlong l; 6051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski double d; 6151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } u; 6251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski jdouble_to_jlong_bits(&v); 6351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski u.d = (double)v; 6451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski return u.l; 6551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski} 6646e3649f898305d185fc40bae2542e933a16b619Piotr Jastrzebskistatic JNINativeMethod gMethods[] = { 6746e3649f898305d185fc40bae2542e933a16b619Piotr Jastrzebski NATIVE_METHOD(Double, longBitsToDouble, "(J)D"), 6846e3649f898305d185fc40bae2542e933a16b619Piotr Jastrzebski NATIVE_METHOD(Double, doubleToRawLongBits, "(D)J"), 6946e3649f898305d185fc40bae2542e933a16b619Piotr Jastrzebski}; 7046e3649f898305d185fc40bae2542e933a16b619Piotr Jastrzebski 7146e3649f898305d185fc40bae2542e933a16b619Piotr Jastrzebskivoid register_java_lang_Double(JNIEnv* env) { 7246e3649f898305d185fc40bae2542e933a16b619Piotr Jastrzebski jniRegisterNativeMethods(env, "java/lang/Double", gMethods, NELEM(gMethods)); 7346e3649f898305d185fc40bae2542e933a16b619Piotr Jastrzebski} 74