[PATCH] PPC64 Use hardware sqrt.

[Steve Munroe]

Paul Mackerras <paulus@samba.org> wrote on 05/11/2004 10:44:37 PM:

> 
> I assume you're going to make a 32-bit glibc use the optional
> instructions if available, so that we see the speedup for 32-bit
> applications running on a 64-bit processor?
> 

Yes. The intent is that 32-bit processes running on 64-bit hardware can 
take advantage of fsqrt and others. For example fctid, fctidz, and fcfid 
instructions are only available on 64-bit implementations independent of 
32-/64-bit mode. We can use PPC_FEATURE_64 to improve llrint() for 
example.

The trick will be to make the test cheep enough ....

Steven J. Munroe
Linux on Power Toolchain Architect
IBM Corporation, Linux Technology Center