sysdeps/i386/i686/fpu/s_fmin.S

   1 /* Compute minimum of two numbers, regarding NaN as missing argument.
   2    Copyright (C) 1997-2021 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
  23 ENTRY(__fmin)
  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         fucomi  %st(1), %st
  31         fcmovnb %st(1), %st
  32
  33         fstp    %st(1)
  34
  35         ret
  36 END(__fmin)
  37 libm_alias_double (__fmin, fmin)