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Jake Ciolek 732f6fa9d5 cmd/compile: use ANDL for small immediates 
We can rewrite ANDQ with an immediate fitting in 32bit with an ANDL, which is shorter to encode.

Looking at Go binary itself, before the change there was:

ANDL: 2337
ANDQ: 4476

After the change:

ANDL: 3790
ANDQ: 3024

So we got rid of 1452 ANDQs

This makes the Linux x86_64 binary 0.03% smaller.

There seems to be an impact on performance.

Intel Cascade Lake benchmarks (with perflock):

name                     old time/op    new time/op    delta
BinaryTree17-8              1.91s ± 1%     1.89s ± 1%  -1.22%  (p=0.000 n=21+18)
Fannkuch11-8                2.34s ± 0%     2.34s ± 0%    ~     (p=0.052 n=20+20)
FmtFprintfEmpty-8          27.7ns ± 1%    27.4ns ± 3%    ~     (p=0.497 n=21+21)
FmtFprintfString-8         53.2ns ± 0%    51.5ns ± 0%  -3.21%  (p=0.000 n=20+19)
FmtFprintfInt-8            57.3ns ± 0%    55.7ns ± 0%  -2.89%  (p=0.000 n=19+19)
FmtFprintfIntInt-8         92.3ns ± 0%    88.4ns ± 1%  -4.23%  (p=0.000 n=20+21)
FmtFprintfPrefixedInt-8     103ns ± 0%     103ns ± 0%  +0.23%  (p=0.000 n=20+21)
FmtFprintfFloat-8           147ns ± 0%     148ns ± 0%  +0.75%  (p=0.000 n=20+21)
FmtManyArgs-8               384ns ± 0%     381ns ± 0%  -0.63%  (p=0.000 n=21+21)
GobDecode-8                3.86ms ± 1%    3.88ms ± 1%  +0.52%  (p=0.000 n=20+21)
GobEncode-8                2.77ms ± 1%    2.77ms ± 0%    ~     (p=0.078 n=21+21)
Gzip-8                      168ms ± 1%     168ms ± 0%  +0.24%  (p=0.000 n=20+20)
Gunzip-8                   25.1ms ± 0%    24.3ms ± 0%  -3.03%  (p=0.000 n=21+21)
HTTPClientServer-8         61.4µs ± 8%    59.1µs ±10%    ~     (p=0.088 n=20+21)
JSONEncode-8               6.86ms ± 0%    6.70ms ± 0%  -2.29%  (p=0.000 n=20+19)
JSONDecode-8               30.8ms ± 1%    30.6ms ± 1%  -0.82%  (p=0.000 n=20+20)
Mandelbrot200-8            3.85ms ± 0%    3.85ms ± 0%    ~     (p=0.191 n=16+17)
GoParse-8                  2.61ms ± 2%    2.60ms ± 1%    ~     (p=0.561 n=21+20)
RegexpMatchEasy0_32-8      48.5ns ± 2%    45.9ns ± 3%  -5.26%  (p=0.000 n=20+21)
RegexpMatchEasy0_1K-8       139ns ± 0%     139ns ± 0%  +0.27%  (p=0.000 n=18+20)
RegexpMatchEasy1_32-8      41.3ns ± 0%    42.1ns ± 4%  +1.95%  (p=0.000 n=17+21)
RegexpMatchEasy1_1K-8       216ns ± 2%     216ns ± 0%  +0.17%  (p=0.020 n=21+19)
RegexpMatchMedium_32-8      790ns ± 7%     803ns ± 8%    ~     (p=0.178 n=21+21)
RegexpMatchMedium_1K-8     23.5µs ± 5%    23.7µs ± 5%    ~     (p=0.421 n=21+21)
RegexpMatchHard_32-8       1.09µs ± 1%    1.09µs ± 1%  -0.53%  (p=0.000 n=19+18)
RegexpMatchHard_1K-8       33.0µs ± 0%    33.0µs ± 0%    ~     (p=0.610 n=21+20)
Revcomp-8                   348ms ± 0%     353ms ± 0%  +1.38%  (p=0.000 n=17+18)
Template-8                 42.0ms ± 1%    41.9ms ± 1%  -0.30%  (p=0.049 n=20+20)
TimeParse-8                 185ns ± 0%     185ns ± 0%    ~     (p=0.387 n=20+18)
TimeFormat-8                237ns ± 1%     241ns ± 1%  +1.57%  (p=0.000 n=21+21)
[Geo mean]                 35.4µs         35.2µs       -0.66%

name                     old speed      new speed      delta
GobDecode-8               199MB/s ± 1%   198MB/s ± 1%  -0.52%  (p=0.000 n=20+21)
GobEncode-8               277MB/s ± 1%   277MB/s ± 0%    ~     (p=0.075 n=21+21)
Gzip-8                    116MB/s ± 1%   115MB/s ± 0%  -0.25%  (p=0.000 n=20+20)
Gunzip-8                  773MB/s ± 0%   797MB/s ± 0%  +3.12%  (p=0.000 n=21+21)
JSONEncode-8              283MB/s ± 0%   290MB/s ± 0%  +2.35%  (p=0.000 n=20+19)
JSONDecode-8             63.0MB/s ± 1%  63.5MB/s ± 1%  +0.82%  (p=0.000 n=20+20)
GoParse-8                22.2MB/s ± 2%  22.3MB/s ± 1%    ~     (p=0.539 n=21+20)
RegexpMatchEasy0_32-8     660MB/s ± 2%   697MB/s ± 3%  +5.57%  (p=0.000 n=20+21)
RegexpMatchEasy0_1K-8    7.36GB/s ± 0%  7.34GB/s ± 0%  -0.26%  (p=0.000 n=18+20)
RegexpMatchEasy1_32-8     775MB/s ± 0%   761MB/s ± 4%  -1.88%  (p=0.000 n=17+21)
RegexpMatchEasy1_1K-8    4.74GB/s ± 2%  4.74GB/s ± 0%  -0.18%  (p=0.020 n=21+19)
RegexpMatchMedium_32-8   40.6MB/s ± 7%  39.9MB/s ± 9%    ~     (p=0.191 n=21+21)
RegexpMatchMedium_1K-8   43.7MB/s ± 5%  43.2MB/s ± 5%    ~     (p=0.435 n=21+21)
RegexpMatchHard_32-8     29.3MB/s ± 1%  29.4MB/s ± 1%  +0.53%  (p=0.000 n=19+18)
RegexpMatchHard_1K-8     31.0MB/s ± 0%  31.0MB/s ± 0%    ~     (p=0.572 n=21+20)
Revcomp-8                 730MB/s ± 0%   720MB/s ± 0%  -1.36%  (p=0.000 n=17+18)
Template-8               46.2MB/s ± 1%  46.3MB/s ± 1%  +0.30%  (p=0.041 n=20+20)
[Geo mean]                204MB/s        205MB/s       +0.30%

Change-Id: Iac75d0ec184a515ce0e65e19559d5fe2e9840514
Reviewed-on: https://go-review.googlesource.com/c/go/+/354970
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
Trust: Josh Bleecher Snyder <josharian@gmail.com>
Trust: Keith Randall <khr@golang.org>
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
 		2021-10-12 22:02:39 +00:00
.github .github: update IRC server 2021-09-30 19:56:27 +00:00
api net/http: add Cookie.Valid method 2021-10-06 23:26:57 +00:00
doc doc/go1.18: document FreeBSD 11.x will no longer be supported 2021-10-11 15:43:15 +00:00
lib/time lib/time: fix RFC 6557 url 2021-08-15 02:18:46 +00:00
misc misc/cgo/testshared: pass the testing.T to goCmd when available 2021-10-08 15:27:20 +00:00
src cmd/compile: use ANDL for small immediates 2021-10-12 22:02:39 +00:00
test cmd/compile: use ANDL for small immediates 2021-10-12 22:02:39 +00:00
.gitattributes all: treat all files as binary, but check in .bat with CRLF 2020-06-08 15:31:43 +00:00
.gitignore internal/buildcfg: move build configuration out of cmd/internal/objabi 2021-04-16 19:20:53 +00:00
AUTHORS A+C: update name to real name and add to AUTHORS 2021-09-16 23:57:28 +00:00
CONTRIBUTING.md all: restore changes from faulty merge/revert 2018-02-12 20:13:59 +00:00
CONTRIBUTORS A+C: update name to real name and add to AUTHORS 2021-09-16 23:57:28 +00:00
LICENSE
…
PATENTS
…
README.md README.md: update contribute URL 2021-09-30 13:33:21 +00:00
SECURITY.md SECURITY.md: update go versions 2019-09-26 15:34:57 +00:00
codereview.cfg codereview.cfg: add codereview.cfg for master branch 2021-02-19 18:44:53 +00:00

README.md

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