1 /* IEEE754 floating point arithmetic 2 * double precision: common utilities 3 */ 4 /* 5 * MIPS floating point support 6 * Copyright (C) 1994-2000 Algorithmics Ltd. 7 * 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. 11 * 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 15 * for more details. 16 * 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. 20 */ 21 22 #include "ieee754dp.h" 23 24 int ieee754dp_cmp(union ieee754dp x, union ieee754dp y, int cmp, int sig) 25 { 26 s64 vx; 27 s64 vy; 28 29 COMPXDP; 30 COMPYDP; 31 32 EXPLODEXDP; 33 EXPLODEYDP; 34 FLUSHXDP; 35 FLUSHYDP; 36 ieee754_clearcx(); /* Even clear inexact flag here */ 37 38 if (ieee754_class_nan(xc) || ieee754_class_nan(yc)) { 39 if (sig || 40 xc == IEEE754_CLASS_SNAN || yc == IEEE754_CLASS_SNAN) 41 ieee754_setcx(IEEE754_INVALID_OPERATION); 42 return (cmp & IEEE754_CUN) != 0; 43 } else { 44 vx = x.bits; 45 vy = y.bits; 46 47 if (vx < 0) 48 vx = -vx ^ DP_SIGN_BIT; 49 if (vy < 0) 50 vy = -vy ^ DP_SIGN_BIT; 51 52 if (vx < vy) 53 return (cmp & IEEE754_CLT) != 0; 54 else if (vx == vy) 55 return (cmp & IEEE754_CEQ) != 0; 56 else 57 return (cmp & IEEE754_CGT) != 0; 58 } 59 } 60