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annotate src/libm/s_fabs.c @ 2978:4c9130d66e2c

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Added a few things to the TODO list. Unit testing is becoming more and more important the more features are added and the more combinations of factors there are to test.
author Sam Lantinga <slouken@libsdl.org>
date Sat, 03 Jan 2009 07:23:11 +0000
parents a98604b691c8
children dc1eb82ffdaa
rev   line source
2756
a98604b691c8 Expanded the libm support and put it into a separate directory.
Sam Lantinga <slouken@libsdl.org>
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1 /* @(#)s_fabs.c 5.1 93/09/24 */
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2 /*
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3 * ====================================================
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4 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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5 *
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6 * Developed at SunPro, a Sun Microsystems, Inc. business.
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7 * Permission to use, copy, modify, and distribute this
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8 * software is freely granted, provided that this notice
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9 * is preserved.
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10 * ====================================================
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11 */
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12
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13 #if defined(LIBM_SCCS) && !defined(lint)
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14 static char rcsid[] = "$NetBSD: s_fabs.c,v 1.7 1995/05/10 20:47:13 jtc Exp $";
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15 #endif
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16
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17 /*
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18 * fabs(x) returns the absolute value of x.
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19 */
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20
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21 #include "math.h"
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22 #include "math_private.h"
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23
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24 libm_hidden_proto(fabs)
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25 #ifdef __STDC__
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26 double fabs(double x)
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27 #else
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28 double fabs(x)
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29 double x;
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30 #endif
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31 {
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32 u_int32_t high;
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33 GET_HIGH_WORD(high, x);
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34 SET_HIGH_WORD(x, high & 0x7fffffff);
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35 return x;
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36 }
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37
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38 libm_hidden_def(fabs)