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080187f4f7
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Giovanni Bajo 080187f4f7 cmd/compile: implement CMOV on amd64 
This builds upon the branchelim pass, activating it for amd64 and
lowering CondSelect. Special care is made to FPU instructions for
NaN handling.

Benchmark results on Xeon E5630 (Westmere EP):

name                      old time/op    new time/op    delta
BinaryTree17-16              4.99s ± 9%     4.66s ± 2%     ~     (p=0.095 n=5+5)
Fannkuch11-16                4.93s ± 3%     5.04s ± 2%     ~     (p=0.548 n=5+5)
FmtFprintfEmpty-16          58.8ns ± 7%    61.4ns ±14%     ~     (p=0.579 n=5+5)
FmtFprintfString-16          114ns ± 2%     114ns ± 4%     ~     (p=0.603 n=5+5)
FmtFprintfInt-16             181ns ± 4%     125ns ± 3%  -30.90%  (p=0.008 n=5+5)
FmtFprintfIntInt-16          263ns ± 2%     217ns ± 2%  -17.34%  (p=0.008 n=5+5)
FmtFprintfPrefixedInt-16     230ns ± 1%     212ns ± 1%   -7.99%  (p=0.008 n=5+5)
FmtFprintfFloat-16           411ns ± 3%     344ns ± 5%  -16.43%  (p=0.008 n=5+5)
FmtManyArgs-16               828ns ± 4%     790ns ± 2%   -4.59%  (p=0.032 n=5+5)
GobDecode-16                10.9ms ± 4%    10.8ms ± 5%     ~     (p=0.548 n=5+5)
GobEncode-16                9.52ms ± 5%    9.46ms ± 2%     ~     (p=1.000 n=5+5)
Gzip-16                      334ms ± 2%     337ms ± 2%     ~     (p=0.548 n=5+5)
Gunzip-16                   64.4ms ± 1%    65.0ms ± 1%   +1.00%  (p=0.008 n=5+5)
HTTPClientServer-16          156µs ± 3%     155µs ± 3%     ~     (p=0.690 n=5+5)
JSONEncode-16               21.0ms ± 1%    21.8ms ± 0%   +3.76%  (p=0.016 n=5+4)
JSONDecode-16               95.1ms ± 0%    95.7ms ± 1%     ~     (p=0.151 n=5+5)
Mandelbrot200-16            6.38ms ± 1%    6.42ms ± 1%     ~     (p=0.095 n=5+5)
GoParse-16                  5.47ms ± 2%    5.36ms ± 1%   -1.95%  (p=0.016 n=5+5)
RegexpMatchEasy0_32-16       111ns ± 1%     111ns ± 1%     ~     (p=0.635 n=5+4)
RegexpMatchEasy0_1K-16       408ns ± 1%     411ns ± 2%     ~     (p=0.087 n=5+5)
RegexpMatchEasy1_32-16       103ns ± 1%     104ns ± 1%     ~     (p=0.484 n=5+5)
RegexpMatchEasy1_1K-16       659ns ± 2%     652ns ± 1%     ~     (p=0.571 n=5+5)
RegexpMatchMedium_32-16      176ns ± 2%     174ns ± 1%     ~     (p=0.476 n=5+5)
RegexpMatchMedium_1K-16     58.6µs ± 4%    57.7µs ± 4%     ~     (p=0.548 n=5+5)
RegexpMatchHard_32-16       3.07µs ± 3%    3.04µs ± 4%     ~     (p=0.421 n=5+5)
RegexpMatchHard_1K-16       89.2µs ± 1%    87.9µs ± 2%   -1.52%  (p=0.032 n=5+5)
Revcomp-16                   575ms ± 0%     587ms ± 2%   +2.12%  (p=0.032 n=4+5)
Template-16                  110ms ± 1%     107ms ± 3%   -3.00%  (p=0.032 n=5+5)
TimeParse-16                 463ns ± 0%     462ns ± 0%     ~     (p=0.810 n=5+4)
TimeFormat-16                538ns ± 0%     535ns ± 0%   -0.63%  (p=0.024 n=5+5)

name                      old speed      new speed      delta
GobDecode-16              70.7MB/s ± 4%  71.4MB/s ± 5%     ~     (p=0.452 n=5+5)
GobEncode-16              80.7MB/s ± 5%  81.2MB/s ± 2%     ~     (p=1.000 n=5+5)
Gzip-16                   58.2MB/s ± 2%  57.7MB/s ± 2%     ~     (p=0.452 n=5+5)
Gunzip-16                  302MB/s ± 1%   299MB/s ± 1%   -0.99%  (p=0.008 n=5+5)
JSONEncode-16             92.4MB/s ± 1%  89.1MB/s ± 0%   -3.63%  (p=0.016 n=5+4)
JSONDecode-16             20.4MB/s ± 0%  20.3MB/s ± 1%     ~     (p=0.135 n=5+5)
GoParse-16                10.6MB/s ± 2%  10.8MB/s ± 1%   +2.00%  (p=0.016 n=5+5)
RegexpMatchEasy0_32-16     286MB/s ± 1%   285MB/s ± 3%     ~     (p=1.000 n=5+5)
RegexpMatchEasy0_1K-16    2.51GB/s ± 1%  2.49GB/s ± 2%     ~     (p=0.095 n=5+5)
RegexpMatchEasy1_32-16     309MB/s ± 1%   307MB/s ± 1%     ~     (p=0.548 n=5+5)
RegexpMatchEasy1_1K-16    1.55GB/s ± 2%  1.57GB/s ± 1%     ~     (p=0.690 n=5+5)
RegexpMatchMedium_32-16   5.68MB/s ± 2%  5.73MB/s ± 1%     ~     (p=0.579 n=5+5)
RegexpMatchMedium_1K-16   17.5MB/s ± 4%  17.8MB/s ± 4%     ~     (p=0.500 n=5+5)
RegexpMatchHard_32-16     10.4MB/s ± 3%  10.5MB/s ± 4%     ~     (p=0.460 n=5+5)
RegexpMatchHard_1K-16     11.5MB/s ± 1%  11.7MB/s ± 2%   +1.57%  (p=0.032 n=5+5)
Revcomp-16                 442MB/s ± 0%   433MB/s ± 2%   -2.05%  (p=0.032 n=4+5)
Template-16               17.7MB/s ± 1%  18.2MB/s ± 3%   +3.12%  (p=0.032 n=5+5)

Change-Id: Ic7cb7374d07da031e771bdcbfdd832fd1b17159c
Reviewed-on: https://go-review.googlesource.com/98695
Reviewed-by: Ilya Tocar <ilya.tocar@intel.com>
2018-03-12 18:01:33 +00:00
.github github: update Pull Request template 2018-02-21 02:07:46 +00:00
api syscall: support Getwd on all BSDs 2018-02-13 15:41:19 +00:00
doc doc/faq: add a Q&A about virus scanners 2018-02-28 05:55:31 +00:00
lib/time all: use HTTPS for iana.org links 2018-02-13 18:36:48 +00:00
misc runtime: use bytes.IndexByte in findnull 2018-03-09 19:37:39 +00:00
src cmd/compile: implement CMOV on amd64 2018-03-12 18:01:33 +00:00
test cmd/compile: implement CMOV on amd64 2018-03-12 18:01:33 +00:00
.gitattributes .gitattributes: prevent all magic line ending changes 2014-12-12 23:14:54 +00:00
.gitignore .gitignore: ignore src/cmd/dist/dist 2017-10-28 21:55:49 +00:00
AUTHORS A+C: update my name and spelling 2018-02-21 04:12:57 +00:00
CONTRIBUTING.md all: restore changes from faulty merge/revert 2018-02-12 20:13:59 +00:00
CONTRIBUTORS A+C: update my name and spelling 2018-02-21 04:12:57 +00:00
favicon.ico website: recreate 16px and 32px favicon 2016-08-25 15:43:32 +00:00
LICENSE doc: revert copyright date to 2009 2016-06-01 22:40:04 +00:00
PATENTS
README.md all: restore changes from faulty merge/revert 2018-02-12 20:13:59 +00:00
robots.txt

README.md

The Go Programming Language

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