1/* IEEE754 floating point arithmetic 2 * single precision 3 */ 4/* 5 * MIPS floating point support 6 * Copyright (C) 1994-2000 Algorithmics Ltd. 7 * 8 * ######################################################################## 9 * 10 * This program is free software; you can distribute it and/or modify it 11 * under the terms of the GNU General Public License (Version 2) as 12 * published by the Free Software Foundation. 13 * 14 * This program is distributed in the hope it will be useful, but WITHOUT 15 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 16 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 17 * for more details. 18 * 19 * You should have received a copy of the GNU General Public License along 20 * with this program; if not, write to the Free Software Foundation, Inc., 21 * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. 22 * 23 * ######################################################################## 24 */ 25 26 27#include "ieee754sp.h" 28 29/* close to ieeep754sp_logb 30*/ 31ieee754sp ieee754sp_frexp(ieee754sp x, int *eptr) 32{ 33 COMPXSP; 34 CLEARCX; 35 EXPLODEXSP; 36 37 switch (xc) { 38 case IEEE754_CLASS_SNAN: 39 case IEEE754_CLASS_QNAN: 40 case IEEE754_CLASS_INF: 41 case IEEE754_CLASS_ZERO: 42 *eptr = 0; 43 return x; 44 case IEEE754_CLASS_DNORM: 45 SPDNORMX; 46 break; 47 case IEEE754_CLASS_NORM: 48 break; 49 } 50 *eptr = xe + 1; 51 return buildsp(xs, -1 + SP_EBIAS, xm & ~SP_HIDDEN_BIT); 52} 53