s_copysign.s

来自「glibc 库, 不仅可以学习使用库函数,还可以学习函数的具体实现,是提高功力的」· S 代码 · 共 39 行

/* Copyright (C) 2000 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., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include <sysdep.h>
#undef ret

ENTRY (__copysign)
{
	fmerge.s fret0 = farg1, farg0
	br.ret.sptk.many rp
}
END (__copysign)

strong_alias (__copysign, __copysignf)
strong_alias (__copysign, __copysignl)

strong_alias (__copysign, __libm_copysign)
strong_alias (__copysign, __libm_copysignf)
strong_alias (__copysign, __libm_copysignl)

weak_alias (__copysign, copysign)
weak_alias (__copysignf, copysignf)
weak_alias (__copysignl, copysignl)