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go / go / a4e1a72f0a40acf84f4b7bd982f3d9cffdf01cfd
commita4e1a72f0a40acf84f4b7bd982f3d9cffdf01cfd[log] [tgz]
authorIlya Tocar <ilya.tocar@intel.com>Tue Jun 20 15:36:34 2017 -0500
committerIlya Tocar <ilya.tocar@intel.com>Fri Sep 01 21:25:25 2017 +0000
tree854355a6e60d9bab55a226f73d8350e793851f87
parent605331f43ee228588b61c5793ce0f754d8c54324 [diff]
cmd/compile/internal/amd64: add MOVLloadidx8 and MOVLstoreidx8

Currently we only use 1 and 4 as a scale for indexed 4-byte load.
In code generated in #20711 we can use indexed load with scale=8,
to improve performance:

name  old time/op  new time/op  delta
GM-6   108µs ± 0%    95µs ± 0%  -12.06%  (p=0.000 n=10+10)

So add new ops and combine loadidx1(shift 3..).. into loadidx8,
same for stores.

Change-Id: I5ed1c250ac40960e20606580cf9de221e75b72f1
Reviewed-on: https://go-review.googlesource.com/46134
Run-TryBot: Ilya Tocar <ilya.tocar@intel.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
5 files changed
tree: 854355a6e60d9bab55a226f73d8350e793851f87
  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
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