Ada bootstrap failure on ia64

[Jim Wilson]

Zack Weinberg wrote:
> This is wrong.  Actually, I think *all* definitions of
> WIDEST_HARDWARE_FP_SIZE are wrong.

WIDEST_HARDWARE_FP_SIZE was added about the time when soft-fp 128-bit 
long doubles were added to the sparc port.

Robert Dewar claimed at the time that the Ada standard required all FP 
operations to be performed in the widest available FP format, and if the 
widest format was a soft-fp format, then that was obviously very bad for 
Ada performance.  So the Ada front end limits the largest FP format to 
the largest one that is available in hardware.

I don't know Ada, so I don't know if there is a better way to solve this.

It makes sense that WIDEST_HARDWARE_FP_SIZE should be the FP precision 
not the FP format size, but since we haven't made this distinction 
before, it isn't surprising that there is confusion here.
-- 
Jim Wilson, GNU Tools Support, http://www.SpecifixInc.com