Sandybridge addmul_N challenge
tg at gmplib.org
Sat Mar 10 23:48:24 CET 2012
I just realised a platform where your karatsuba addmul_2 could help a
lot: atom-64. There, addmul_2 currently runs at 20 c/l. The pipeline
is two-way superscalar and in-order. The mul insn can be repeated
someting like one every 16th cycle.
There is a dual-core atom-64 in the test systems setup, hehe.gmplib.org.
It is currently offline for various reasons.
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