MIPS: Alchemy: Convert dbdma.c to syscore_ops
[linux-2.6/linux-mips.git] / arch / mips / math-emu / dp_logb.c
blob151127e59f5c47b8b20b18f0baa378e0aeb76923
1 /* IEEE754 floating point arithmetic
2 * double precision: common utilities
3 */
4 /*
5 * MIPS floating point support
6 * Copyright (C) 1994-2000 Algorithmics Ltd.
8 * ########################################################################
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.
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.
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.
23 * ########################################################################
27 #include "ieee754dp.h"
29 ieee754dp ieee754dp_logb(ieee754dp x)
31 COMPXDP;
33 CLEARCX;
35 EXPLODEXDP;
37 switch (xc) {
38 case IEEE754_CLASS_SNAN:
39 return ieee754dp_nanxcpt(x, "logb", x);
40 case IEEE754_CLASS_QNAN:
41 return x;
42 case IEEE754_CLASS_INF:
43 return ieee754dp_inf(0);
44 case IEEE754_CLASS_ZERO:
45 return ieee754dp_inf(1);
46 case IEEE754_CLASS_DNORM:
47 DPDNORMX;
48 break;
49 case IEEE754_CLASS_NORM:
50 break;
52 return ieee754dp_fint(xe);