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1 /* |
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2 * Copyright (c) 1997, 2005, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 #include "jni.h" |
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27 #include "jni_util.h" |
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28 #include "jlong.h" |
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29 #include "jvm.h" |
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30 |
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31 #include "java_lang_Double.h" |
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32 |
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33 /* |
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34 * Find the double float corresponding to a given bit pattern |
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35 */ |
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36 JNIEXPORT jdouble JNICALL |
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37 Java_java_lang_Double_longBitsToDouble(JNIEnv *env, jclass unused, jlong v) |
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38 { |
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39 union { |
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40 jlong l; |
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41 double d; |
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42 } u; |
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43 jlong_to_jdouble_bits(&v); |
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44 u.l = v; |
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45 return (jdouble)u.d; |
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46 } |
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47 |
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48 /* |
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49 * Find the bit pattern corresponding to a given double float, NOT collapsing NaNs |
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50 */ |
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51 JNIEXPORT jlong JNICALL |
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52 Java_java_lang_Double_doubleToRawLongBits(JNIEnv *env, jclass unused, jdouble v) |
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53 { |
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54 union { |
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55 jlong l; |
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56 double d; |
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57 } u; |
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58 jdouble_to_jlong_bits(&v); |
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59 u.d = (double)v; |
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60 return u.l; |
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61 } |