[PATCH 3/3] Optimize 64-bit mpn_add_N and mpn_sub_N for sparc T3 and later.

Richard Henderson rth at twiddle.net
Tue Mar 5 15:53:18 CET 2013

On 03/05/2013 04:54 AM, Torbjorn Granlund wrote:
> There is currently no mpn/sparc64/ultrasparct3, only ultrasparct1.  For
> which CPUs are these new add_n/sub_n intended?  Why not also for for
> other CPUs?

For T3 and T4.  This file makes use of new instructions: addxc(cc).
Honestly, why they didn't have a proper 64-bit with carry insn right
from the very first v9 cpu is a mystery.


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