forked from KolibriOS/kolibrios
81 lines
2.5 KiB
C
81 lines
2.5 KiB
C
/*
|
|
(C) Copyright IBM Corp. 2009
|
|
|
|
All rights reserved.
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions are met:
|
|
|
|
* Redistributions of source code must retain the above copyright notice,
|
|
this list of conditions and the following disclaimer.
|
|
* Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in the
|
|
documentation and/or other materials provided with the distribution.
|
|
* Neither the name of IBM nor the names of its contributors may be
|
|
used to endorse or promote products derived from this software without
|
|
specific prior written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
|
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
#include "local.h"
|
|
|
|
#ifdef _HAVE_LONG_DOUBLE
|
|
|
|
#if defined (__x86_64__) || defined (__i386__)
|
|
static const int map[] = {
|
|
1, /* round to nearest */
|
|
3, /* round to zero */
|
|
2, /* round to negative infinity */
|
|
0 /* round to positive infinity */
|
|
};
|
|
|
|
int
|
|
__flt_rounds(void)
|
|
{
|
|
int x;
|
|
|
|
/* Assume that the x87 and the SSE unit agree on the rounding mode. */
|
|
__asm("fnstcw %0" : "=m" (x));
|
|
return (map[(x >> 10) & 0x03]);
|
|
}
|
|
#define FLT_ROUNDS __flt_rounds()
|
|
#else
|
|
#define FLT_ROUNDS 0
|
|
#endif
|
|
|
|
long double
|
|
_strtold_r (struct _reent *ptr, const char *__restrict s00,
|
|
char **__restrict se)
|
|
{
|
|
#ifdef _LDBL_EQ_DBL
|
|
/* On platforms where long double is as wide as double. */
|
|
return _strtod_r (ptr, s00, se);
|
|
#else
|
|
long double result;
|
|
|
|
_strtorx_r (ptr, s00, se, FLT_ROUNDS, &result);
|
|
return result;
|
|
#endif
|
|
}
|
|
|
|
long double
|
|
strtold (const char *__restrict s00, char **__restrict se)
|
|
{
|
|
return _strtold_r (_REENT, s00, se);
|
|
}
|
|
|
|
#endif /* _HAVE_LONG_DOUBLE */
|
|
|