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9359218f | 1 | /* Compute maximum of two numbers, regarding NaN as missing argument. |
b168057a | 2 | Copyright (C) 2002-2015 Free Software Foundation, Inc. |
9359218f AJ |
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 | |
59ba27a6 PE |
17 | License along with the GNU C Library; if not, see |
18 | <http://www.gnu.org/licenses/>. */ | |
9359218f AJ |
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) |