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.h"
31 #include "native/native.h"
35 #include "native/include/java_lang_Double.h"
38 #include "vm/builtin.h"
41 /* native methods implemented by this file ************************************/
43 static JNINativeMethod methods[] = {
44 { (char*) "doubleToLongBits", (char*) "(D)J", (void*) (uintptr_t) &Java_java_lang_Double_doubleToLongBits },
45 { (char*) "longBitsToDouble", (char*) "(J)D", (void*) (uintptr_t) &Java_java_lang_Double_longBitsToDouble },
49 /* _Jv_java_lang_Double_init ***************************************************
51 Register native functions.
53 *******************************************************************************/
57 void _Jv_java_lang_Double_init(void)
61 u = utf_new_char("java/lang/Double");
63 native_method_register(u, methods, NATIVE_METHODS_COUNT);
68 // Native functions are exported as C functions.
72 * Class: java/lang/Double
73 * Method: doubleToLongBits
76 JNIEXPORT int64_t JNICALL Java_java_lang_Double_doubleToLongBits(JNIEnv *env, jclass clazz, double doubleValue)
82 #if defined(__IEEE_BYTES_LITTLE_ENDIAN)
83 /* On little endian ARM processors when using FPA, word order of
84 doubles is still big endian. So take that into account here. When
85 using VFP, word order of doubles follows byte order. */
87 #define SWAP_DOUBLE(a) (((a) << 32) | (((a) >> 32) & 0x00000000ffffffff))
89 val.j = SWAP_DOUBLE(val.j);
92 e = val.j & 0x7ff0000000000000LL;
93 f = val.j & 0x000fffffffffffffLL;
95 if (e == DBL_POSINF && f != 0L)
103 * Class: java/lang/Double
104 * Method: longBitsToDouble
107 JNIEXPORT double JNICALL Java_java_lang_Double_longBitsToDouble(JNIEnv *env, jclass clazz, int64_t longValue)
112 #if defined(__IEEE_BYTES_LITTLE_ENDIAN)
113 val.j = SWAP_DOUBLE(val.j);
123 * These are local overrides for various environment variables in Emacs.
124 * Please do not remove this and leave it at the end of the file, where
125 * Emacs will automagically detect them.
126 * ---------------------------------------------------------------------
129 * indent-tabs-mode: t