1 | /* Compute maximum of two numbers, regarding NaN as missing argument. |
2 | Copyright (C) 2002-2016 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | Contributed by Andreas Jaeger <aj@suse.de>, 2002. |
5 | |
6 | The GNU C Library is free software; you can redistribute it and/or |
7 | modify it under the terms of the GNU Lesser General Public |
8 | License as published by the Free Software Foundation; either |
9 | version 2.1 of the License, or (at your option) any later version. |
10 | |
11 | The GNU C Library is distributed in the hope that it will be useful, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
14 | Lesser General Public License for more details. |
15 | |
16 | You should have received a copy of the GNU Lesser General Public |
17 | License along with the GNU C Library; if not, see |
18 | <http://www.gnu.org/licenses/>. */ |
19 | |
20 | #include <sysdep.h> |
21 | |
22 | .text |
23 | ENTRY(__fmax) |
24 | ucomisd %xmm0, %xmm1 |
25 | jp 1f // jump if unordered |
26 | maxsd %xmm1, %xmm0 |
27 | jmp 2f |
28 | |
29 | 1: ucomisd %xmm1, %xmm1 // Is xmm1 a NaN? |
30 | jp 2f // then return xmm0 |
31 | movsd %xmm1, %xmm0 // otherwise return xmm1 |
32 | |
33 | 2: ret |
34 | END(__fmax) |
35 | weak_alias (__fmax, fmax) |
36 | |