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6973fc01 | 1 | /* Compute maximum of two numbers, regarding NaN as missing argument. |
2b778ceb | 2 | Copyright (C) 1997-2021 Free Software Foundation, Inc. |
6973fc01 | 3 | This file is part of the GNU C Library. |
6973fc01 UD |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
6973fc01 UD |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
6973fc01 | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
6973fc01 UD |
18 | |
19 | #include <sysdep.h> | |
e4602cba | 20 | #include <libm-alias-float.h> |
6973fc01 UD |
21 | |
22 | .text | |
23 | ENTRY(__fmaxf) | |
24 | flds 4(%esp) // x | |
25 | flds 8(%esp) // x : y | |
26 | ||
27 | fucomi %st(0), %st | |
28 | fcmovu %st(1), %st // now %st contains y if not NaN, x otherwise | |
29 | ||
30 | fxch | |
31 | ||
32 | fucomi %st(1), %st | |
33 | fcmovb %st(1), %st | |
34 | ||
35 | fstp %st(1) | |
36 | ||
37 | ret | |
38 | END(__fmaxf) | |
e4602cba | 39 | libm_alias_float (__fmax, fmax) |