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/* Returns non-zero if the _Decimal32 is nan
Copyright (C) 2006 IBM Corporation.
Author(s): Joseph Kerian <jkerian@us.ibm.com>
The Decimal Floating Point C Library is free software; you can
redistribute it and/or modify it under the terms of the GNU Lesser
General Public License version 2.1.
The Decimal Floating Point 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 version 2.1 for more details.
You should have received a copy of the GNU Lesser General Public
License version 2.1 along with the Decimal Floating Point C Library;
if not, write to the Free Software Foundation, Inc., 59 Temple Place,
Suite 330, Boston, MA 02111-1307 USA.
Please see dfp/COPYING.txt for more information. */
#ifndef _DECIMAL_SIZE
# define _DECIMAL_SIZE 32
# include <decimal32.h>
#endif
#include <math.h>
#include <endian.h>
#define FUNCTION_NAME isnan
#include <dfpmacro.h>
int
INTERNAL_FUNCTION_NAME (DEC_TYPE x)
{
uint8_t top_byte;
union
{
DEC_TYPE dec;
uint8_t bytes[_DECIMAL_SIZE/8];
} u_conv;
u_conv.dec = x;
#if BYTE_ORDER == BIG_ENDIAN
top_byte = u_conv.bytes[0];
#else
top_byte = u_conv.bytes[_DECIMAL_SIZE/8 - 1];
#endif
return (top_byte & DECIMAL_NaN) == DECIMAL_NaN;
}
weak_alias (INTERNAL_FUNCTION_NAME, EXTERNAL_FUNCTION_NAME)
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