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glibc  2.9
s_fabsf.c
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00001 /* Copyright (C) 2000 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003    Contributed by Richard Henderson.
00004 
00005    The GNU C Library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Lesser General Public
00007    License as published by the Free Software Foundation; either
00008    version 2.1 of the License, or (at your option) any later version.
00009 
00010    The GNU C Library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Lesser General Public License for more details.
00014 
00015    You should have received a copy of the GNU Lesser General Public
00016    License along with the GNU C Library; if not, write to the Free
00017    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00018    02111-1307 USA.  */
00019 
00020 #include <math.h>
00021 
00022 float
00023 __fabsf (float x)
00024 {
00025 #if __GNUC_PREREQ (2, 8)
00026   return __builtin_fabsf (x);
00027 #else
00028   __asm ("cpys $f31, %1, %0" : "=f" (x) : "f" (x));
00029   return x;
00030 #endif
00031 }
00032 
00033 weak_alias (__fabsf, fabsf)