cmd/compile: optimize AMD64 with more read-modify-write operations
6 more operations which do read-modify-write with a constant
source operand are added.
1. The total size of pkg/linux_amd64 decreases about 3KB, excluding
cmd/compile.
2. The go1 benckmark shows a slight improvement.
name old time/op new time/op delta
BinaryTree17-4 2.61s ± 4% 2.67s ± 2% +2.26% (p=0.000 n=30+29)
Fannkuch11-4 2.39s ± 2% 2.32s ± 2% -2.67% (p=0.000 n=30+30)
FmtFprintfEmpty-4 44.0ns ± 4% 41.7ns ± 4% -5.15% (p=0.000 n=30+30)
FmtFprintfString-4 74.2ns ± 4% 72.3ns ± 4% -2.59% (p=0.000 n=30+30)
FmtFprintfInt-4 81.7ns ± 3% 78.8ns ± 4% -3.54% (p=0.000 n=27+30)
FmtFprintfIntInt-4 130ns ± 4% 124ns ± 5% -4.60% (p=0.000 n=30+30)
FmtFprintfPrefixedInt-4 154ns ± 3% 152ns ± 3% -1.13% (p=0.012 n=30+30)
FmtFprintfFloat-4 215ns ± 4% 212ns ± 5% -1.56% (p=0.002 n=30+30)
FmtManyArgs-4 522ns ± 3% 512ns ± 3% -1.84% (p=0.001 n=30+30)
GobDecode-4 6.42ms ± 5% 6.49ms ± 7% ~ (p=0.070 n=30+30)
GobEncode-4 6.07ms ± 8% 5.98ms ± 8% ~ (p=0.150 n=30+30)
Gzip-4 236ms ± 4% 223ms ± 4% -5.57% (p=0.000 n=30+30)
Gunzip-4 37.4ms ± 3% 36.7ms ± 4% -2.03% (p=0.000 n=30+30)
HTTPClientServer-4 58.7µs ± 1% 58.5µs ± 2% -0.37% (p=0.018 n=30+29)
JSONEncode-4 12.0ms ± 4% 12.1ms ± 3% ~ (p=0.112 n=30+30)
JSONDecode-4 54.5ms ± 3% 55.5ms ± 4% +1.80% (p=0.006 n=30+30)
Mandelbrot200-4 3.78ms ± 4% 3.78ms ± 4% ~ (p=0.173 n=30+30)
GoParse-4 3.16ms ± 5% 3.22ms ± 5% +1.75% (p=0.010 n=30+30)
RegexpMatchEasy0_32-4 76.6ns ± 1% 75.9ns ± 3% ~ (p=0.672 n=25+30)
RegexpMatchEasy0_1K-4 252ns ± 3% 253ns ± 3% +0.57% (p=0.027 n=30+30)
RegexpMatchEasy1_32-4 69.8ns ± 4% 70.2ns ± 6% ~ (p=0.539 n=30+30)
RegexpMatchEasy1_1K-4 374ns ± 3% 373ns ± 5% ~ (p=0.263 n=30+30)
RegexpMatchMedium_32-4 107ns ± 4% 109ns ± 3% ~ (p=0.067 n=30+30)
RegexpMatchMedium_1K-4 33.9µs ± 5% 34.1µs ± 4% ~ (p=0.297 n=30+30)
RegexpMatchHard_32-4 1.54µs ± 3% 1.56µs ± 4% +1.43% (p=0.002 n=30+30)
RegexpMatchHard_1K-4 46.6µs ± 3% 47.0µs ± 3% ~ (p=0.055 n=30+30)
Revcomp-4 411ms ± 6% 407ms ± 6% ~ (p=0.219 n=30+30)
Template-4 66.8ms ± 3% 64.8ms ± 5% -3.01% (p=0.000 n=30+30)
TimeParse-4 312ns ± 2% 319ns ± 3% +2.50% (p=0.000 n=30+30)
TimeFormat-4 296ns ± 5% 299ns ± 3% +0.93% (p=0.005 n=30+30)
[Geo mean] 47.5µs 47.1µs -0.75%
name old speed new speed delta
GobDecode-4 120MB/s ± 5% 118MB/s ± 6% ~ (p=0.072 n=30+30)
GobEncode-4 127MB/s ± 8% 129MB/s ± 8% ~ (p=0.150 n=30+30)
Gzip-4 82.1MB/s ± 4% 87.0MB/s ± 4% +5.90% (p=0.000 n=30+30)
Gunzip-4 519MB/s ± 4% 529MB/s ± 4% +2.07% (p=0.001 n=30+30)
JSONEncode-4 162MB/s ± 4% 161MB/s ± 3% ~ (p=0.110 n=30+30)
JSONDecode-4 35.6MB/s ± 3% 35.0MB/s ± 4% -1.77% (p=0.007 n=30+30)
GoParse-4 18.3MB/s ± 4% 18.0MB/s ± 4% -1.72% (p=0.009 n=30+30)
RegexpMatchEasy0_32-4 418MB/s ± 1% 422MB/s ± 3% ~ (p=0.645 n=25+30)
RegexpMatchEasy0_1K-4 4.06GB/s ± 3% 4.04GB/s ± 3% -0.57% (p=0.033 n=30+30)
RegexpMatchEasy1_32-4 459MB/s ± 4% 456MB/s ± 6% ~ (p=0.530 n=30+30)
RegexpMatchEasy1_1K-4 2.73GB/s ± 3% 2.75GB/s ± 5% ~ (p=0.279 n=30+30)
RegexpMatchMedium_32-4 9.28MB/s ± 5% 9.18MB/s ± 4% ~ (p=0.086 n=30+30)
RegexpMatchMedium_1K-4 30.2MB/s ± 4% 30.0MB/s ± 4% ~ (p=0.300 n=30+30)
RegexpMatchHard_32-4 20.8MB/s ± 3% 20.5MB/s ± 4% -1.41% (p=0.002 n=30+30)
RegexpMatchHard_1K-4 22.0MB/s ± 3% 21.8MB/s ± 3% ~ (p=0.051 n=30+30)
Revcomp-4 619MB/s ± 7% 625MB/s ± 7% ~ (p=0.219 n=30+30)
Template-4 29.0MB/s ± 3% 29.9MB/s ± 4% +3.11% (p=0.000 n=30+30)
[Geo mean] 123MB/s 123MB/s +0.28%
Change-Id: I850652cfd53329c1af804b7f57f4393d8097bb0d
Reviewed-on: https://go-review.googlesource.com/121135
Run-TryBot: Ben Shi <powerman1st@163.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ilya Tocar <ilya.tocar@intel.com>