[PATCH] Add optimized addmul_1 and submul_1 for IBM z13

Torbjörn Granlund tg at gmplib.org
Mon Mar 1 15:37:02 UTC 2021

I played a bit with an addmul_1 of my own, with some ideas from your
code.  I don't plan to do more work on this.  Does this perform well on

Note that it only works for n = 0 (mod 4).

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