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go / go / d8f1f8d8568d680be0845379d477264fd09324c3
commitd8f1f8d8568d680be0845379d477264fd09324c3[log] [tgz]
authorAlexandru Moșoi <brtzsnr@gmail.com>Thu Mar 24 22:46:37 2016 +0100
committerAlexandru Moșoi <alexandru@mosoi.ro>Wed Mar 30 22:27:13 2016 +0000
tree92550c24f77aff25d7e6ee9e8a25e1302a8b86f7
parent1624a9c9e79c1c5dd9a4e69c359c98838c3eb6f8 [diff]
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>
3 files changed
tree: 92550c24f77aff25d7e6ee9e8a25e1302a8b86f7
  1. .github/
  2. api/
  3. doc/
  4. lib/
  5. misc/
  6. src/
  7. test/
  8. .gitattributes
  9. .gitignore
  10. AUTHORS
  11. CONTRIBUTING.md
  12. CONTRIBUTORS
  13. favicon.ico
  14. LICENSE
  15. PATENTS
  16. README.md
  17. robots.txt
README.md

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For example, if you extracted the tar file into $HOME/go, you might put the following in your .profile:

export GOROOT=$HOME/go
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See https://golang.org/doc/install or doc/install.html for more details.