| /* Copy a sign bit between floating-point values. |
| Copyright (C) 1997, 1999, 2000, 2006 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 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., 1 Franklin Street, Fifth Floor, Boston MA |
| 02110-1301 USA. */ |
| |
| /* This has been coded in assembler because GCC makes such a mess of it |
| when it's coded in C. */ |
| |
| #include <sysdep.h> |
| #include <math_ldbl_opt.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 r1,-16(r1) |
| cfi_adjust_cfa_offset (16) |
| stfd fp2,8(r1) |
| lwz r3,8(r1) |
| cmpwi r3,0 |
| addi r1,r1,16 |
| cfi_adjust_cfa_offset (-16) |
| blt L(0) |
| fabs fp1,fp1 |
| blr |
| L(0): fnabs fp1,fp1 |
| 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 |
| #ifdef IS_IN_libm |
| # if LONG_DOUBLE_COMPAT(libm, GLIBC_2_0) |
| compat_symbol (libm, __copysign, copysignl, GLIBC_2_0) |
| # endif |
| #elif LONG_DOUBLE_COMPAT(libc, GLIBC_2_0) |
| compat_symbol (libc, __copysign, copysignl, GLIBC_2_0) |
| #endif |
