1/* Compute maximum of two numbers, regarding NaN as missing argument. 2 Copyright (C) 1997-2022 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 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. 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 13 Lesser General Public License for more details. 14 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/>. */ 18 19#include <sysdep.h> 20#include <libm-alias-double.h> 21 22 .text 23ENTRY(__fmax) 24 fldl 4(%esp) // x 25 fldl 12(%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 38END(__fmax) 39libm_alias_double (__fmax, fmax) 40