tree 92550c24f77aff25d7e6ee9e8a25e1302a8b86f7
parent 1624a9c9e79c1c5dd9a4e69c359c98838c3eb6f8
author Alexandru Moșoi <brtzsnr@gmail.com> 1458855997 +0100
committer Alexandru Moșoi <alexandru@mosoi.ro> 1459376833 +0000

cmd/compile: generalize strength reduction of mulq

* This is an improved version of an earlier patch.
* Verified with gcc up to 100.
* Limited to two instructions based on costs from
https://gmplib.org/~tege/x86-timing.pdf

Change-Id: Ib7c37de6fd8e0ba554459b15c7409508cbcf6728
Reviewed-on: https://go-review.googlesource.com/21103
Reviewed-by: Keith Randall <khr@golang.org>
Run-TryBot: Alexandru Moșoi <alexandru@mosoi.ro>
TryBot-Result: Gobot Gobot <gobot@golang.org>