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 | ||
| 2209bcb1 | 29 | int ieee754sp_cmp(union ieee754sp x, union ieee754sp y, int cmp, int sig) |
| 1da177e4 LT |
30 | { |
| 31 | COMPXSP; | |
| 32 | COMPYSP; | |
| 33 | ||
| 34 | EXPLODEXSP; | |
| 35 | EXPLODEYSP; | |
| 36 | FLUSHXSP; | |
| 37 | FLUSHYSP; | |
| 38 | CLEARCX; /* Even clear inexact flag here */ | |
| 39 | ||
| 40 | if (ieee754sp_isnan(x) || ieee754sp_isnan(y)) { | |
| 41 | if (sig || xc == IEEE754_CLASS_SNAN || yc == IEEE754_CLASS_SNAN) | |
| 42 | SETCX(IEEE754_INVALID_OPERATION); | |
| 43 | if (cmp & IEEE754_CUN) | |
| 44 | return 1; | |
| 45 | if (cmp & (IEEE754_CLT | IEEE754_CGT)) { | |
| 46 | if (sig && SETANDTESTCX(IEEE754_INVALID_OPERATION)) | |
| 47 | return ieee754si_xcpt(0, "fcmpf", x); | |
| 48 | } | |
| 49 | return 0; | |
| 50 | } else { | |
| 51 | int vx = x.bits; | |
| 52 | int vy = y.bits; | |
| 53 | ||
| 54 | if (vx < 0) | |
| 55 | vx = -vx ^ SP_SIGN_BIT; | |
| 56 | if (vy < 0) | |
| 57 | vy = -vy ^ SP_SIGN_BIT; | |
| 58 | ||
| 59 | if (vx < vy) | |
| 60 | return (cmp & IEEE754_CLT) != 0; | |
| 61 | else if (vx == vy) | |
| 62 | return (cmp & IEEE754_CEQ) != 0; | |
| 63 | else | |
| 64 | return (cmp & IEEE754_CGT) != 0; | |
| 65 | } | |
| 66 | } |