1 /* Compute maximum of two numbers, regarding NaN as missing argument.
2 Copyright (C) 2002-2021 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
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.
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
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
20 #include <libm-alias-float.h>
25 jp 1f // jump if unordered
29 1: ucomiss %xmm1, %xmm1 // Is xmm1 a NaN?
31 // xmm0 is a NaN; xmm1 is not. Test if xmm0 is signaling.
35 movss %xmm1, %xmm0 // otherwise return xmm1
38 3: // xmm1 is a NaN; xmm0 may or may not be.
41 // xmm1 is a NaN; xmm0 is not. Test if xmm1 is signaling.
47 4: // Both arguments are NaNs, or one is a signaling NaN.
52 libm_alias_float (__fmax, fmax)