[power-gnu-discuss] Support for the MPC5554 (e200z6 core)

[David Brown]

Nathan Froyd wrote:
> On Mon, Jun 01, 2009 at 11:25:13PM +0200, David Brown wrote:
>> Does anyone know if current gcc versions support using spe instructions 
>> for hardware floating point, or if there is likely to be any support 
>> soon?  If I can't find a way to generate the spe instructions from gcc, 
>> I'm going to have to recommend my customer buys Code Worrier...
> 
> GCC does support generating SPE instructions for hardware floating
> point.  You need to compile with the "-te500v1" flag, which enables the
> compiler to use single-precision floating-point SPE instructions.  You
> should not use additional "-mcpu=" flags on the command-line along with
> "-te500v1".
> 
> -Nathan
> 

Marvellous!  This looks like gcc is now generating exactly the code I 
want - SPE instructions for single precision, and library code for 
double precision (unless -fshort-double is in effect).

I can't see the -te500v1 flag documented anywhere - is it a new flag 
that hasn't yet made it into the documentation?

Many thanks,

David