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| author |   Gabriel F. T. Gomes <gabriel@inconstante.eti.br> | 2018-06-10 22:42:34 -0300 |
|---|---|---|
| committer | Gabriel F. T. Gomes <gabriel@inconstante.eti.br> | 2018-12-07 17:28:26 -0200 |
| commit | 10446f5d9f2cf4d91c8ae483fd2b5470242ae2a1 (patch) | |
| tree | 68e631fca5b65a44e28f5b3791ff2e9b8fc56a25 /stdio-common | |
| parent | hurd: Fix linknamespace of spawni (diff) | |
| download | glibc-10446f5d9f2cf4d91c8ae483fd2b5470242ae2a1.tar.gz glibc-10446f5d9f2cf4d91c8ae483fd2b5470242ae2a1.tar.bz2 glibc-10446f5d9f2cf4d91c8ae483fd2b5470242ae2a1.zip | |
Prepare vfscanf to use __strtof128_internal
On powerpc64le, long double can currently take two formats: the same as
double (-mlong-double-64) or IBM Extended Precision (default with
-mlong-double-128 or explicitly with -mabi=ibmlongdouble). The internal
implementation of scanf-like functions is aware of these possibilites
and, based on the format in use, properly calls __strtold_internal or
__strtod_internal, saving the return to a variable of type double or
long double.
When library support for TS 18661-3 was added to glibc, a new function,
__strtof128_internal, was added to enable reading of floating-point
values with IEEE binary128 format into the _Float128 type. Now that
powerpc64le is getting support for its third long double format, and
taking into account that this format is the same as the format of
_Float128, this patch extends __vfscanf_internal and __vfwscanf_internal
to call __strtof128_internal or __wcstof128_internal when appropriate.
The result gets saved into a variable of _Float128 type.
Tested for powerpc64le.
Diffstat (limited to 'stdio-common')
| -rw-r--r-- | stdio-common/vfscanf-internal.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/stdio-common/vfscanf-internal.c b/stdio-common/vfscanf-internal.c index 19cfef0906..5d002078d8 100644 --- a/stdio-common/vfscanf-internal.c +++ b/stdio-common/vfscanf-internal.c @@ -98,6 +98,9 @@ # define __strtold_internal __wcstold_internal # define __strtod_internal __wcstod_internal # define __strtof_internal __wcstof_internal +# if __HAVE_FLOAT128_UNLIKE_LDBL +# define __strtof128_internal __wcstof128_internal +# endif # define L_(Str) L##Str # define CHAR_T wchar_t @@ -2420,6 +2423,17 @@ __vfscanf_internal (FILE *s, const char *format, va_list argptr, done = EOF; goto errout; } +#if __HAVE_FLOAT128_UNLIKE_LDBL + if ((flags & LONGDBL) \ + && (mode_flags & SCANF_LDBL_USES_FLOAT128) != 0) + { + _Float128 d = __strtof128_internal + (char_buffer_start (&charbuf), &tw, flags & GROUP); + if (!(flags & SUPPRESS) && tw != char_buffer_start (&charbuf)) + *ARG (_Float128 *) = d; + } + else +#endif if ((flags & LONGDBL) \ && __glibc_likely ((mode_flags & SCANF_LDBL_IS_DBL) == 0)) { |