1 /* src/native/vm/cldc1.1/java_lang_Double.c
3 Copyright (C) 2006, 2007, 2008
4 CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
6 This file is part of CACAO.
8 This program is free software; you can redistribute it and/or
9 modify it under the terms of the GNU General Public License as
10 published by the Free Software Foundation; either version 2, or (at
11 your option) any later version.
13 This program is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
30 #include "native/jni.hpp"
31 #include "native/native.h"
33 #if defined(ENABLE_JNI_HEADERS)
34 # include "native/include/java_lang_Double.h"
37 #include "vm/builtin.h"
40 // Native functions are exported as C functions.
44 * Class: java/lang/Double
45 * Method: doubleToLongBits
48 JNIEXPORT jlong JNICALL Java_java_lang_Double_doubleToLongBits(JNIEnv *env, jclass clazz, jdouble doubleValue)
54 #if defined(__IEEE_BYTES_LITTLE_ENDIAN)
55 /* On little endian ARM processors when using FPA, word order of
56 doubles is still big endian. So take that into account here. When
57 using VFP, word order of doubles follows byte order. */
59 #define SWAP_DOUBLE(a) (((a) << 32) | (((a) >> 32) & 0x00000000ffffffff))
61 val.j = SWAP_DOUBLE(val.j);
64 e = val.j & 0x7ff0000000000000LL;
65 f = val.j & 0x000fffffffffffffLL;
67 if (e == DBL_POSINF && f != 0L)
75 * Class: java/lang/Double
76 * Method: longBitsToDouble
79 JNIEXPORT jdouble JNICALL Java_java_lang_Double_longBitsToDouble(JNIEnv *env, jclass clazz, jlong longValue)
84 #if defined(__IEEE_BYTES_LITTLE_ENDIAN)
85 val.j = SWAP_DOUBLE(val.j);
94 /* native methods implemented by this file ************************************/
96 static JNINativeMethod methods[] = {
97 { (char*) "doubleToLongBits", (char*) "(D)J", (void*) (uintptr_t) &Java_java_lang_Double_doubleToLongBits },
98 { (char*) "longBitsToDouble", (char*) "(J)D", (void*) (uintptr_t) &Java_java_lang_Double_longBitsToDouble },
102 /* _Jv_java_lang_Double_init ***************************************************
104 Register native functions.
106 *******************************************************************************/
110 void _Jv_java_lang_Double_init(void)
114 u = utf_new_char("java/lang/Double");
116 native_method_register(u, methods, NATIVE_METHODS_COUNT);
122 * These are local overrides for various environment variables in Emacs.
123 * Please do not remove this and leave it at the end of the file, where
124 * Emacs will automagically detect them.
125 * ---------------------------------------------------------------------
128 * indent-tabs-mode: t