1 /* Copy a sign bit between floating-point values.
2 Copyright (C) 1997, 1999, 2000, 2006 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 1 Franklin Street, Fifth Floor, Boston MA
20 /* This has been coded in assembler because GCC makes such a mess of it
21 when it's coded in C. */
24 #include <math_ldbl_opt.h>
27 /* double [f1] copysign (double [f1] x, double [f2] y);
28 copysign(x,y) returns a value with the magnitude of x and
29 with the sign bit of y. */
31 cfi_adjust_cfa_offset (16)
36 cfi_adjust_cfa_offset (-16)
44 weak_alias (__copysign,copysign)
46 /* It turns out that it's safe to use this code even for single-precision. */
47 weak_alias (__copysign,copysignf)
48 strong_alias(__copysign,__copysignf)
51 weak_alias (__copysign,copysignl)
52 strong_alias(__copysign,__copysignl)
55 # if LONG_DOUBLE_COMPAT(libm, GLIBC_2_0)
56 compat_symbol (libm, __copysign, copysignl, GLIBC_2_0)
58 #elif LONG_DOUBLE_COMPAT(libc, GLIBC_2_0)
59 compat_symbol (libc, __copysign, copysignl, GLIBC_2_0)