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| author | Gabriel F. T. Gomes <gftg@linux.vnet.ibm.com> | 2016-11-03 12:37:08 -0200 |
|---|---|---|
| committer | Gabriel F. T. Gomes <gftg@linux.vnet.ibm.com> | 2017-05-25 16:14:46 -0300 |
| commit | b2da97305ccbfbbe16778ba3b6acb59268ab625c (patch) | |
| tree | 569aed42477c529fe8741d06ffacf33603f06a1c /stdlib | |
| parent | fb91e22c252dbefd1b141fdf151903cf5aea7727 (diff) | |
| download | glibc-b2da97305ccbfbbe16778ba3b6acb59268ab625c.tar.gz glibc-b2da97305ccbfbbe16778ba3b6acb59268ab625c.tar.xz glibc-b2da97305ccbfbbe16778ba3b6acb59268ab625c.zip | |
float128: Add strfromf128
Add strfromf128 to stdlib when _Float128 support is enabled. 2016-11-07 Gabriel F. T. Gomes <gftg@linux.vnet.ibm.com> * NEWS: Mention the addition of strfromf128. * include/gmp.h: Include bits/floatn.h for _Float128 support. * 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 (__printf_fphex): Likewise. * 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.
Diffstat (limited to 'stdlib')
| -rw-r--r-- | stdlib/fpioconst.h | 4 | ||||
| -rw-r--r-- | stdlib/stdlib.h | 8 | ||||
| -rw-r--r-- | stdlib/strfrom-skeleton.c | 6 |
3 files changed, 18 insertions, 0 deletions
diff --git a/stdlib/fpioconst.h b/stdlib/fpioconst.h index 7e19b0d33e..aab46d68c1 100644 --- a/stdlib/fpioconst.h +++ b/stdlib/fpioconst.h @@ -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 diff --git a/stdlib/stdlib.h b/stdlib/stdlib.h index 99125f2d23..1313aa5eb5 100644 --- a/stdlib/stdlib.h +++ b/stdlib/stdlib.h @@ -51,6 +51,9 @@ __BEGIN_DECLS # endif #endif /* X/Open or XPG7 and <sys/wait.h> not included. */ +/* _FloatN API tests for enablement. */ +#include <bits/floatn.h> + /* Returned by `div'. */ typedef struct { @@ -173,6 +176,11 @@ extern int strfromf (char *__dest, size_t __size, const char *__format, extern int strfroml (char *__dest, size_t __size, const char *__format, long double __f) __THROW __nonnull ((3)); +# if __HAVE_FLOAT128 && __GLIBC_USE (IEC_60559_TYPES_EXT) +extern int strfromf128 (char *__dest, size_t __size, const char * __format, + _Float128 __f) + __THROW __nonnull ((3)); +# endif #endif diff --git a/stdlib/strfrom-skeleton.c b/stdlib/strfrom-skeleton.c index 811a29c7d3..5841919fe4 100644 --- a/stdlib/strfrom-skeleton.c +++ b/stdlib/strfrom-skeleton.c @@ -132,6 +132,12 @@ STRFROM (char *dest, size_t size, const char *format, FLOAT f) which type of floating-point number is being passed. */ info.is_long_double = __builtin_types_compatible_p (FLOAT, long double); + /* Similarly, the function strfromf128 passes a floating-point number in + _Float128 format to printf_fp. */ +#if __HAVE_DISTINCT_FLOAT128 + info.is_binary128 = __builtin_types_compatible_p (FLOAT, _Float128); +#endif + /* Set info according to the format string. */ info.prec = precision; info.spec = specifier; |