projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* IEEE754 floating point arithmetic |
| 2 | * single precision | |
| 3 | */ | |
| 4 | /* | |
| 5 | * MIPS floating point support | |
| 6 | * Copyright (C) 1994-2000 Algorithmics Ltd. | |
| 1da177e4 LT |
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 | ieee754sp ieee754sp_logb(ieee754sp x) | |
| 30 | { | |
| 31 | COMPXSP; | |
| 32 | ||
| 33 | CLEARCX; | |
| 34 | ||
| 35 | EXPLODEXSP; | |
| 36 | ||
| 37 | switch (xc) { | |
| 38 | case IEEE754_CLASS_SNAN: | |
| 39 | return ieee754sp_nanxcpt(x, "logb", x); | |
| 40 | case IEEE754_CLASS_QNAN: | |
| 41 | return x; | |
| 42 | case IEEE754_CLASS_INF: | |
| 43 | return ieee754sp_inf(0); | |
| 44 | case IEEE754_CLASS_ZERO: | |
| 45 | return ieee754sp_inf(1); | |
| 46 | case IEEE754_CLASS_DNORM: | |
| 47 | SPDNORMX; | |
| 48 | break; | |
| 49 | case IEEE754_CLASS_NORM: | |
| 50 | break; | |
| 51 | } | |
| 52 | return ieee754sp_fint(xe); | |
| 53 | } |