diff options
Diffstat (limited to 'sysdeps/x86_64/fpu/s_fmaxl.S')
| -rw-r--r-- | sysdeps/x86_64/fpu/s_fmaxl.S | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/sysdeps/x86_64/fpu/s_fmaxl.S b/sysdeps/x86_64/fpu/s_fmaxl.S new file mode 100644 index 0000000000..557ef3a17c --- /dev/null +++ b/sysdeps/x86_64/fpu/s_fmaxl.S @@ -0,0 +1,40 @@ +/* Compute maximum of two numbers, regarding NaN as missing argument. + Copyright (C) 1997, 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(__fmaxl) + fldt 8(%rsp) // x + fldt 24(%rsp) // x : y + + fucomi %st(0), %st + fcmovu %st(1), %st // now %st contains y if not NaN, x otherwise + + fxch + + fucomi %st(1), %st + fcmovb %st(1), %st + + fstp %st(1) + + ret +END(__fmaxl) +weak_alias (__fmaxl, fmaxl) |