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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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4
stdlib/fpioconst.h
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@ -44,6 +44,10 @@
IBM extended precision). */
#include <bits/floatn.h>
#if __HAVE_DISTINCT_FLOAT128
# define FLT128_MAX_10_EXP_LOG 12 /* = floor(log_2(FLT128_MAX_10_EXP)) */
#endif
/* For strtold, we need powers of 10 up to floor (log_2 (LDBL_MANT_DIG
- LDBL_MIN_EXP + 2)). When _Float128 is enabled in libm and it is
ABI-distinct from long double (e.g. on powerpc64le), we also need powers