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annotate libquadmath/math/fdimq.c @ 68:561a7518be6b

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update gcc-4.6
author Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
date Sun, 21 Aug 2011 07:07:55 +0900
parents
children 1830386684a0
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68
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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1 /* Return positive difference between arguments.
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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2 Copyright (C) 1997, 2004, 2009 Free Software Foundation, Inc.
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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3 This file is part of the GNU C Library.
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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5
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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6 The GNU C Library is free software; you can redistribute it and/or
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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7 modify it under the terms of the GNU Lesser General Public
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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8 License as published by the Free Software Foundation; either
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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9 version 2.1 of the License, or (at your option) any later version.
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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10
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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11 The GNU C Library is distributed in the hope that it will be useful,
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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14 Lesser General Public License for more details.
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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15
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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16 You should have received a copy of the GNU Lesser General Public
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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17 License along with the GNU C Library; if not, write to the Free
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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19 02111-1307 USA. */
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20
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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21 #include <errno.h>
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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22 #include "quadmath-imp.h"
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23
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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24 __float128
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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25 fdimq (__float128 x, __float128 y)
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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26 {
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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27 int clsx = fpclassifyq (x);
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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28 int clsy = fpclassifyq (y);
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29
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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30 if (clsx == QUADFP_NAN || clsy == QUADFP_NAN
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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31 || (y < 0 && clsx == QUADFP_INFINITE && clsy == QUADFP_INFINITE))
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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32 /* Raise invalid flag. */
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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33 return x - y;
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34
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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35 if (x <= y)
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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36 return 0.0Q;
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37
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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38 __float128 r = x - y;
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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39 if (isinfq (r))
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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40 errno = ERANGE;
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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41
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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42 return r;
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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43 }