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/* isinf(). 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 __isinf(x) */
.section ".toc","aw"
.LC0: /* 1.0 */
.tc FD_ONE[TC],0x3ff0000000000000
.section ".text"
.type __isinf, @function
.machine power7
EALIGN (__isinf, 4, 0)
CALL_MCOUNT 0
lfd fp0,.LC0@toc(r2)
ftdiv cr7,fp1,fp0
li r3,0
bflr 29 /* If not INF, return. */
/* Either we have -INF/+INF or a denormal. */
stfd fp1,-16(r1) /* Transfer FP to GPR's. */
ori 2,2,0 /* Force a new dispatch group. */
lhz r4,-16+HISHORT(r1) /* Fetch the upper 16 bits of the FP value
(biased exponent and sign bit). */
cmpwi cr7,r4,0x7ff0 /* r4 == 0x7ff0? */
li r3,1
beqlr cr7 /* EQ means INF, otherwise -INF. */
li r3,-1
blr
END (__isinf)
hidden_def (__isinf)
weak_alias (__isinf, isinf)
/* It turns out that the 'double' version will also always work for
single-precision. */
strong_alias (__isinf, __isinff)
hidden_def (__isinff)
weak_alias (__isinff, isinff)
#ifdef NO_LONG_DOUBLE
strong_alias (__isinf, __isinfl)
weak_alias (__isinf, isinfl)
#endif
#ifndef IS_IN_libm
# if LONG_DOUBLE_COMPAT(libc, GLIBC_2_0)
compat_symbol (libc, __isinf, __isinfl, GLIBC_2_0);
compat_symbol (libc, isinf, isinfl, GLIBC_2_0);
# endif
#endif
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