/* Copy a sign bit between floating-point values.  PowerPC64 version.

   Copyright (C) 1997-2018 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, see

   <http://www.gnu.org/licenses/>.  */

/* 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>

#include <libm-alias-float.h>

#include <libm-alias-double.h>

ENTRY_TOCLESS (__copysign)

	CALL_MCOUNT 0

/* 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.  */

	stfd	fp2,-8(r1)

	nop

	nop

	nop

	ld	r3,-8(r1)

	cmpdi   r3,0

	blt     L(0)

	fabs    fp1,fp1

	blr

L(0):	fnabs   fp1,fp1

	blr

	END (__copysign)

libm_alias_double (__copysign, copysign)

/* It turns out that it's safe to use this code even for single-precision.  */

strong_alias(__copysign,__copysignf)

libm_alias_float (__copysign, copysign)

#if LONG_DOUBLE_COMPAT (libc, GLIBC_2_0)

compat_symbol (libc, __copysign, copysignl, GLIBC_2_0)

#endif