/* isnan().  PowerPC64/POWER7 version.

   Copyright (C) 2010-2018 Free Software Foundation, Inc.

   Contributed by Luis Machado <luisgpm@br.ibm.com>.

   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/>.  */

#include <sysdep.h>

#include <math_ldbl_opt.h>

/* int __isnan(x)  */

	.section    ".toc","aw"

.LC0:   /* 1.0 */

	.tc	    FD_ONE[TC],0x3ff0000000000000

	.section    ".text"

	.type	    __isnan, @function

	.machine    power7

ENTRY (__isnan, 4)

	CALL_MCOUNT 0

	lfd	fp0,.LC0@toc(r2)

	ftdiv	cr7,fp1,fp0

	li	r3,0

	bflr	30	      /* If not NaN, finish.  */

	stfd    fp1,-16(r1)   /* Transfer FP to GPR's.  */

	ori	2,2,0	      /* Force a new dispatch group.  */

	ld	r4,-16(r1)    /* Load FP into GPR.  */

	lis     r0,0x7ff0

	sldi	r0,r0,32      /* const long r0 0x7ff00000 00000000.  */

	clrldi	r4,r4,1	      /* x = fabs(x)  */

	cmpd	cr7,r4,r0     /* if (fabs(x) <= inf)  */

	blelr	cr7	      /* LE means not NaN.  */

	li	r3,1	      /* else return 1  */

	blr

	END (__isnan)

hidden_def (__isnan)

weak_alias (__isnan, isnan)

/* It turns out that the 'double' version will also always work for

   single-precision.  */

strong_alias (__isnan, __isnanf)

hidden_def (__isnanf)

weak_alias (__isnanf, isnanf)

#ifdef NO_LONG_DOUBLE

strong_alias (__isnan, __isnanl)

weak_alias (__isnan, isnanl)

#endif

#if !IS_IN (libm)

# if LONG_DOUBLE_COMPAT(libc, GLIBC_2_0)

compat_symbol (libc, __isnan, __isnanl, GLIBC_2_0);

compat_symbol (libc, isnan, isnanl, GLIBC_2_0);

# endif

#endif