glibc/sysdeps/x86_64/fpu/s_fdiml.S

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/* Compute positive difference.
Copyright (C) 1997, 1998, 2002 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <sysdep.h>
.text
ENTRY(__fdiml)
fldt 8(%rsp) // x
fldt 24(%rsp) // x : y
fucomi %st(1), %st
jp 1f
fsubrp %st, %st(1)
fldz
fcomi %st(1), %st
fcmovb %st(1), %st
jmp 2f
1: fucomi %st(0), %st
fcmovnu %st(1), %st
2: fstp %st(1)
ret
END(__fdiml)
weak_alias (__fdiml, fdiml)