diff options
Diffstat (limited to 'sysdeps/powerpc/fpu/s_copysign.S')
| -rw-r--r-- | sysdeps/powerpc/fpu/s_copysign.S | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/sysdeps/powerpc/fpu/s_copysign.S b/sysdeps/powerpc/fpu/s_copysign.S new file mode 100644 index 0000000000..0f27fef809 --- /dev/null +++ b/sysdeps/powerpc/fpu/s_copysign.S @@ -0,0 +1,50 @@ +/* Copy a sign bit between floating-point values. + Copyright (C) 1997, 1999 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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. */ + +/* This has been coded in assembler because GCC makes such a mess of it + when it's coded in C. */ + +#include <sysdep.h> + +ENTRY(__copysign) +/* double [f1] copysign (double [f1] x, double [f2] y); + copysign(x,y) returns a value with the magnitude of x and + with the sign bit of y. */ + stwu 1,-16(1) + stfd 2,8(1) + lwz 3,8(1) + cmpwi 3,0 + addi 1,1,16 + blt 0f + fabs 1,1 + blr +0: fnabs 1,1 + blr + END (__copysign) + +weak_alias(__copysign,copysign) + +/* It turns out that it's safe to use this code even for single-precision. */ +weak_alias(__copysign,copysignf) +strong_alias(__copysign,__copysignf) + +#ifdef NO_LONG_DOUBLE +weak_alias(__copysign,copysignl) +strong_alias(__copysign,__copysignl) +#endif |