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float128: Add strfromf128

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Add strfromf128 to stdlib when _Float128 support is enabled.

	* stdio-common/printf-parsemb.c (__parse_one_specmb): Initialize
	spec->info.is_binary128 to zero.
	* stdio-common/printf.h (printf_info): Add new member is_binary128
	to indicate that the number being converted to string is compatible
	with the IEC 60559 binary128 format.
	* stdio-common/printf_fp.c (__printf_fp_l): Add code to deal with
	_Float128 numbers.
	* stdio-common/printf_fphex.c: Include ieee754_float128.h and
	ldbl-128/printf_fphex_macros.h
	(__printf_fphex): Add code to deal with _Float128 numbers.
	* stdio-common/printf_size.c (__printf_size): Likewise.
	* stdio-common/vfprintf.c (process_arg): Initialize member
	info.is_binary128 to zero.
	* stdlib/fpioconst.h (FLT128_MAX_10_EXP_LOG): New macro.
	* stdlib/stdlib.h: Include bits/floatn.h for _Float128 support.
	(strfromf128): New declaration.
	* stdlib/strfrom-skeleton.c (STRFROM): Set member info.is_binary128
	to one.
	* sysdeps/ieee754/float128/Makefile: Add strfromf128.
	* sysdeps/ieee754/float128/Versions: Likewise.
	* sysdeps/ieee754/float128/strfromf128.c: New file.
This commit is contained in:
Gabriel F. T. Gomes
2016-11-03 12:37:08 -02:00
parent 2bc646c9e9
commit cf2046ec7d
13 changed files with 173 additions and 8 deletions
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21
stdio-common/printf_fphex.c
View File

@ -31,6 +31,14 @@
#include <stdbool.h>
#include <rounding-mode.h>
#if __HAVE_DISTINCT_FLOAT128
# include "ieee754_float128.h"
# include <ldbl-128/printf_fphex_macros.h>
# define PRINT_FPHEX_FLOAT128 \
PRINT_FPHEX (_Float128, fpnum.flt128, ieee854_float128, \
IEEE854_FLOAT128_BIAS)
#endif
/* #define NDEBUG 1*/ /* Undefine this for debugging assertions. */
#include <assert.h>
@ -94,6 +102,9 @@ __printf_fphex (FILE *fp,
{
union ieee754_double dbl;
long double ldbl;
#if __HAVE_DISTINCT_FLOAT128
_Float128 flt128;
#endif
}
fpnum;
@ -195,6 +206,11 @@ __printf_fphex (FILE *fp,
}
/* Fetch the argument value. */
#if __HAVE_DISTINCT_FLOAT128
if (info->is_binary128)
PRINTF_FPHEX_FETCH (_Float128, fpnum.flt128)
else
#endif
#ifndef __NO_LONG_DOUBLE_MATH
if (info->is_long_double && sizeof (long double) > sizeof (double))
PRINTF_FPHEX_FETCH (long double, fpnum.ldbl)
@ -230,6 +246,11 @@ __printf_fphex (FILE *fp,
return done;
}
#if __HAVE_DISTINCT_FLOAT128
if (info->is_binary128)
PRINT_FPHEX_FLOAT128;
else
#endif
if (info->is_long_double == 0 || sizeof (double) == sizeof (long double))
{
/* We have 52 bits of mantissa plus one implicit digit. Since