Re: AES assembler optimizations

[Paul Mackerras]

David S. Miller writes:

> On sparc64, we:
> 
> 1) Always save the full FPU state at context switch time if it
>    is active.
> 
> 2) On entry to a FPU-using kernel routine, we save the FPU if
>    it is active.

How is that implemented?  Do you have some magic to make gcc emit a
call to an fpu-save routine in the prolog if the function uses the
FPU?  Or are you only talking about functions written in assembler?

Paul.
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