Committer: Michael Beasley <mike@snafu.setup>
[mikesnafu-overlay.git] / arch / mips / math-emu / sp_logb.c
blob3c337219ca32625511542fc1cca68b10c5879693
1 /* IEEE754 floating point arithmetic
2 * single precision
3 */
4 /*
5 * MIPS floating point support
6 * Copyright (C) 1994-2000 Algorithmics Ltd.
7 * http://www.algor.co.uk
9 * ########################################################################
11 * This program is free software; you can distribute it and/or modify it
12 * under the terms of the GNU General Public License (Version 2) as
13 * published by the Free Software Foundation.
15 * This program is distributed in the hope it will be useful, but WITHOUT
16 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
17 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 * for more details.
20 * You should have received a copy of the GNU General Public License along
21 * with this program; if not, write to the Free Software Foundation, Inc.,
22 * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
24 * ########################################################################
28 #include "ieee754sp.h"
30 ieee754sp ieee754sp_logb(ieee754sp x)
32 COMPXSP;
34 CLEARCX;
36 EXPLODEXSP;
38 switch (xc) {
39 case IEEE754_CLASS_SNAN:
40 return ieee754sp_nanxcpt(x, "logb", x);
41 case IEEE754_CLASS_QNAN:
42 return x;
43 case IEEE754_CLASS_INF:
44 return ieee754sp_inf(0);
45 case IEEE754_CLASS_ZERO:
46 return ieee754sp_inf(1);
47 case IEEE754_CLASS_DNORM:
48 SPDNORMX;
49 break;
50 case IEEE754_CLASS_NORM:
51 break;
53 return ieee754sp_fint(xe);