Commit | Line | Data |
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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 | } |