sysdeps/i386/fpu/s_fminl.S

   1 /* Compute minimum of two numbers, regarding NaN as missing argument.
   2    Copyright (C) 1997-2016 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
   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
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <sysdep.h>
  21
  22         .text
  23 ENTRY(__fminl)
  24         fldt    4(%esp)         // x
  25         fldt    16(%esp)        // x : y
  26
  27         fxam
  28         fnstsw
  29         andb    $0x45, %ah
  30         cmpb    $0x01, %ah
  31         je      1f              // y == NaN
  32
  33         fucom   %st(1)
  34         fnstsw
  35         sahf
  36         jc      2f
  37
  38 1:      fxch    %st(1)
  39 2:      fstp    %st(1)
  40
  41         ret
  42 END(__fminl)
  43 weak_alias (__fminl, fminl)