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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> | 2017-06-07 17:08:21 -0300 |
| commit | cf2046ec7dd4b233180377cc5b8debcf551d1fc9 (patch) | |
| tree | 40f45dc6bb3c49eadff4653c2a9ab0775f2f9cf7 /stdlib | |
| parent | 2bc646c9e95b7c0005b2bc09c06671ffbb509629 (diff) | |
| download | glibc-cf2046ec7dd4b233180377cc5b8debcf551d1fc9.zip glibc-cf2046ec7dd4b233180377cc5b8debcf551d1fc9.tar.gz glibc-cf2046ec7dd4b233180377cc5b8debcf551d1fc9.tar.bz2 | |
float128: Add strfromf128
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.
Diffstat (limited to 'stdlib')
| -rw-r--r-- | stdlib/fpioconst.h | 4 | ||||
| -rw-r--r-- | stdlib/stdlib.h | 9 | ||||
| -rw-r--r-- | stdlib/strfrom-skeleton.c | 6 |
3 files changed, 19 insertions, 0 deletions
diff --git a/stdlib/fpioconst.h b/stdlib/fpioconst.h index 2559d7a..c05f8e7 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 428ca2e..0a693c2 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 { @@ -175,6 +178,12 @@ extern int strfroml (char *__dest, size_t __size, const char *__format, __THROW __nonnull ((3)); #endif +#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 + #ifdef __USE_GNU /* The concept of one static locale per category is not very well diff --git a/stdlib/strfrom-skeleton.c b/stdlib/strfrom-skeleton.c index 811a29c..5841919 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; |