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/* isnan(). PowerPC64/POWER7 version.
Copyright (C) 2010-2013 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
EALIGN (__isnan, 4, 0)
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
#ifndef 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
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