1 /* IEEE754 floating point arithmetic
2 * double precision: common utilities
5 * MIPS floating point support
6 * Copyright (C) 1994-2000 Algorithmics Ltd.
8 * This program is free software; you can distribute it and/or modify it
9 * under the terms of the GNU General Public License (Version 2) as
10 * published by the Free Software Foundation.
12 * This program is distributed in the hope it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
22 #include "ieee754dp.h"
24 int ieee754dp_cmp(union ieee754dp x, union ieee754dp y, int cmp, int sig)
36 ieee754_clearcx(); /* Even clear inexact flag here */
38 if (ieee754dp_isnan(x) || ieee754dp_isnan(y)) {
39 if (sig || xc == IEEE754_CLASS_SNAN || yc == IEEE754_CLASS_SNAN)
40 ieee754_setcx(IEEE754_INVALID_OPERATION);
41 if (cmp & IEEE754_CUN)
43 if (cmp & (IEEE754_CLT | IEEE754_CGT)) {
44 if (sig && ieee754_setandtestcx(IEEE754_INVALID_OPERATION))
53 vx = -vx ^ DP_SIGN_BIT;
55 vy = -vy ^ DP_SIGN_BIT;
58 return (cmp & IEEE754_CLT) != 0;
60 return (cmp & IEEE754_CEQ) != 0;
62 return (cmp & IEEE754_CGT) != 0;