1 /* src/native/vm/cldc1.1/java_lang_Double.c
3 Copyright (C) 2006, 2007 R. Grafl, A. Krall, C. Kruegel, C. Oates,
4 R. Obermaisser, M. Platter, M. Probst, S. Ring, E. Steiner,
5 C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich, J. Wenninger,
6 Institut f. Computersprachen - TU Wien
8 This file is part of CACAO.
10 This program is free software; you can redistribute it and/or
11 modify it under the terms of the GNU General Public License as
12 published by the Free Software Foundation; either version 2, or (at
13 your option) any later version.
15 This program is distributed in the hope that it will be useful, but
16 WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
25 $Id: java_lang_VMRuntime.c 5900 2006-11-04 17:30:44Z michi $
33 #include "native/jni.h"
34 #include "native/native.h"
36 #include "native/include/java_lang_Double.h"
38 #include "vm/builtin.h"
41 /* native methods implemented by this file ************************************/
43 static JNINativeMethod methods[] = {
44 { "doubleToLongBits", "(D)J", (void *) (ptrint) &Java_java_lang_Double_doubleToLongBits },
45 { "longBitsToDouble", "(J)D", (void *) (ptrint) &Java_java_lang_Double_longBitsToDouble },
49 /* _Jv_java_lang_Double_init ***************************************************
51 Register native functions.
53 *******************************************************************************/
55 void _Jv_java_lang_Double_init(void)
59 u = utf_new_char("java/lang/Double");
61 native_method_register(u, methods, NATIVE_METHODS_COUNT);
66 * Class: java/lang/Double
67 * Method: doubleToLongBits
70 JNIEXPORT s8 JNICALL Java_java_lang_Double_doubleToLongBits(JNIEnv *env, jclass clazz, double doubleValue)
76 #if defined(__IEEE_BYTES_LITTLE_ENDIAN)
77 /* On little endian ARM processors when using FPA, word order of
78 doubles is still big endian. So take that into account here. When
79 using VFP, word order of doubles follows byte order. */
81 #define SWAP_DOUBLE(a) (((a) << 32) | (((a) >> 32) & 0x00000000ffffffff))
83 val.j = SWAP_DOUBLE(val.j);
86 e = val.j & 0x7ff0000000000000LL;
87 f = val.j & 0x000fffffffffffffLL;
89 if (e == DBL_POSINF && f != 0L)
97 * Class: java/lang/Double
98 * Method: longBitsToDouble
101 JNIEXPORT double JNICALL Java_java_lang_Double_longBitsToDouble(JNIEnv *env, jclass clazz, s8 longValue)
106 #if defined(__IEEE_BYTES_LITTLE_ENDIAN)
107 val.j = SWAP_DOUBLE(val.j);
115 * These are local overrides for various environment variables in Emacs.
116 * Please do not remove this and leave it at the end of the file, where
117 * Emacs will automagically detect them.
118 * ---------------------------------------------------------------------
121 * indent-tabs-mode: t