diff options
Diffstat (limited to 'sysdeps/i386/fpu/s_fdim.S')
| -rw-r--r-- | sysdeps/i386/fpu/s_fdim.S | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/sysdeps/i386/fpu/s_fdim.S b/sysdeps/i386/fpu/s_fdim.S new file mode 100644 index 0000000000..7a1e2ffa49 --- /dev/null +++ b/sysdeps/i386/fpu/s_fdim.S @@ -0,0 +1,51 @@ +/* Compute positive difference. + Copyright (C) 1997, 1999 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <sysdep.h> + + .text +ENTRY(__fdim) + fldl 4(%esp) // x + fldl 12(%esp) // x : y + + fucom %st(1) + fnstsw + sahf + jp 1f + + fsubrp %st, %st(1) + jc 2f + + fstp %st(0) + fldz + jmp 2f + +1: fxam + fnstsw + andb $0x45, %ah + cmpb $0x01, %ah + je 3f + + fxch +3: fstp %st(1) + +2: ret +END(__fdim) +weak_alias (__fdim, fdim) |