projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* IEEE754 floating point arithmetic |
| 2 | * double precision: common utilities | |
| 3 | */ | |
| 4 | /* | |
| 5 | * MIPS floating point support | |
| 6 | * Copyright (C) 1994-2000 Algorithmics Ltd. | |
| 1da177e4 | 7 | * |
| 1da177e4 LT |
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., | |
| 3f7cac41 | 19 | * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 1da177e4 LT |
20 | */ |
| 21 | ||
| 1da177e4 LT |
22 | #include "ieee754dp.h" |
| 23 | ||
| 2209bcb1 | 24 | int ieee754dp_cmp(union ieee754dp x, union ieee754dp y, int cmp, int sig) |
| 1da177e4 | 25 | { |
| 3f7cac41 RB |
26 | s64 vx; |
| 27 | s64 vy; | |
| 28 | ||
| 1da177e4 LT |
29 | COMPXDP; |
| 30 | COMPYDP; | |
| 31 | ||
| 32 | EXPLODEXDP; | |
| 33 | EXPLODEYDP; | |
| 34 | FLUSHXDP; | |
| 35 | FLUSHYDP; | |
| 9e8bad1f | 36 | ieee754_clearcx(); /* Even clear inexact flag here */ |
| 1da177e4 LT |
37 | |
| 38 | if (ieee754dp_isnan(x) || ieee754dp_isnan(y)) { | |
| b844bc78 MR |
39 | if (sig || |
| 40 | xc == IEEE754_CLASS_SNAN || yc == IEEE754_CLASS_SNAN) | |
| 9e8bad1f | 41 | ieee754_setcx(IEEE754_INVALID_OPERATION); |
| 1da177e4 LT |
42 | if (cmp & IEEE754_CUN) |
| 43 | return 1; | |
| 44 | if (cmp & (IEEE754_CLT | IEEE754_CGT)) { | |
| 9e8bad1f | 45 | if (sig && ieee754_setandtestcx(IEEE754_INVALID_OPERATION)) |
| 90efba36 | 46 | return 0; |
| 1da177e4 LT |
47 | } |
| 48 | return 0; | |
| 49 | } else { | |
| 3f7cac41 RB |
50 | vx = x.bits; |
| 51 | vy = y.bits; | |
| 1da177e4 LT |
52 | |
| 53 | if (vx < 0) | |
| 54 | vx = -vx ^ DP_SIGN_BIT; | |
| 55 | if (vy < 0) | |
| 56 | vy = -vy ^ DP_SIGN_BIT; | |
| 57 | ||
| 58 | if (vx < vy) | |
| 59 | return (cmp & IEEE754_CLT) != 0; | |
| 60 | else if (vx == vy) | |
| 61 | return (cmp & IEEE754_CEQ) != 0; | |
| 62 | else | |
| 63 | return (cmp & IEEE754_CGT) != 0; | |
| 64 | } | |
| 65 | } |