> On Mar 13, 2017, at 6:31 PM, Segher Boessenkool <seg...@kernel.crashing.org>
> wrote:
>
> Hi Bill,
>
> On Mon, Mar 13, 2017 at 01:11:01PM -0500, Bill Schmidt wrote:
>> Index: gcc/doc/extend.texi
>> ===================================================================
>> --- gcc/doc/extend.texi (revision 246014)
>> +++ gcc/doc/extend.texi (working copy)
>> @@ -948,10 +948,28 @@ names can be used together with @code{_Complex} to
>> types.
>>
>> As an extension, GNU C and GNU C++ support additional floating
>> -types, @code{__float80} and @code{__float128} to support 80-bit
>> -(@code{XFmode}) and 128-bit (@code{TFmode}) floating types; these are
>> -aliases for the type names @code{_Float64x} and @code{_Float128}.
>> -Support for additional types includes the arithmetic operators:
>> +types, which are not supported by all targets.
>> +@itemize @bullet
>> +@item @code{__float128} is available on i386, x86_64, IA-64, and
>> +hppa HP-UX, as well as on PowerPC 64-bit GNU/Linux targets that enable
>> +the vector scalar (VSX) instruction set. @code{__float128} supports
>> +the 128-bit floating type. On i386, x86_64, PowerPC, and IA-64
>> +other than HP-UX, @code{__float128} is an alias for @code{_Float128}.
>> +On hppa and IA-64 HP-UX, @code{__float128} is an alias for @code{long
>> +double}.
>
> __float128 (-mfloat128) does not require 64-bit PowerPC, only hardware
> support (-mfloat128-hardware) requires it (and only because we haven't
> implemented it for 32-bit).
OK, I will drop the "64-bit" modifier.
Thanks,
Bill
>
>
> Segher
>
