[PATCH 02/14] Prepare vfscanf to use __strtof128_internal

[Joseph Myers]

On Wed, 20 Jun 2018, Gabriel F. T. Gomes wrote:

> 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 when appropriate.  The result gets saved
> into a variable of _Float128 type.

This patch is OK once Zack's patches are reviewed and checked in.

-- 
Joseph S. Myers
joseph@codesourcery.com