cmd/compile: implement "OPC $imm, (mem)" for 386
New read-modify-write operations are introduced in this CL for 386.
1. The total size of pkg/linux_386 decreases about 10KB (excluding
cmd/compile).
2. The go1 benchmark shows little regression.
name old time/op new time/op delta
BinaryTree17-4 3.32s ± 4% 3.29s ± 2% ~ (p=0.059 n=30+30)
Fannkuch11-4 3.49s ± 1% 3.46s ± 1% -0.92% (p=0.001 n=30+30)
FmtFprintfEmpty-4 47.7ns ± 2% 46.8ns ± 5% -1.93% (p=0.011 n=25+30)
FmtFprintfString-4 79.5ns ± 7% 80.2ns ± 3% +0.89% (p=0.001 n=28+29)
FmtFprintfInt-4 90.5ns ± 2% 92.1ns ± 2% +1.82% (p=0.014 n=22+30)
FmtFprintfIntInt-4 141ns ± 1% 144ns ± 3% +2.23% (p=0.013 n=22+30)
FmtFprintfPrefixedInt-4 183ns ± 2% 184ns ± 3% ~ (p=0.080 n=21+30)
FmtFprintfFloat-4 409ns ± 3% 412ns ± 3% +0.83% (p=0.040 n=30+30)
FmtManyArgs-4 597ns ± 6% 607ns ± 4% +1.71% (p=0.006 n=30+30)
GobDecode-4 7.21ms ± 5% 7.18ms ± 6% ~ (p=0.665 n=30+30)
GobEncode-4 7.17ms ± 6% 7.09ms ± 7% ~ (p=0.117 n=29+30)
Gzip-4 413ms ± 4% 399ms ± 4% -3.48% (p=0.000 n=30+30)
Gunzip-4 41.3ms ± 4% 41.7ms ± 3% +1.05% (p=0.011 n=30+30)
HTTPClientServer-4 63.5µs ± 3% 62.9µs ± 2% -0.97% (p=0.017 n=30+27)
JSONEncode-4 20.3ms ± 5% 20.1ms ± 5% -1.16% (p=0.004 n=30+30)
JSONDecode-4 66.2ms ± 4% 67.7ms ± 4% +2.21% (p=0.000 n=30+30)
Mandelbrot200-4 5.16ms ± 3% 5.18ms ± 3% ~ (p=0.123 n=30+30)
GoParse-4 3.23ms ± 2% 3.27ms ± 2% +1.08% (p=0.006 n=30+30)
RegexpMatchEasy0_32-4 98.9ns ± 5% 97.1ns ± 4% -1.83% (p=0.006 n=30+30)
RegexpMatchEasy0_1K-4 842ns ± 3% 842ns ± 3% ~ (p=0.550 n=30+30)
RegexpMatchEasy1_32-4 107ns ± 4% 105ns ± 4% -1.93% (p=0.012 n=30+30)
RegexpMatchEasy1_1K-4 1.03µs ± 4% 1.04µs ± 4% ~ (p=0.304 n=30+30)
RegexpMatchMedium_32-4 132ns ± 2% 129ns ± 4% -2.02% (p=0.000 n=21+30)
RegexpMatchMedium_1K-4 44.1µs ± 4% 43.8µs ± 3% ~ (p=0.641 n=30+30)
RegexpMatchHard_32-4 2.26µs ± 4% 2.23µs ± 4% -1.28% (p=0.023 n=30+30)
RegexpMatchHard_1K-4 68.1µs ± 3% 68.6µs ± 4% ~ (p=0.089 n=30+30)
Revcomp-4 1.85s ± 2% 1.84s ± 2% ~ (p=0.072 n=30+30)
Template-4 69.2ms ± 3% 68.5ms ± 3% -1.04% (p=0.012 n=30+30)
TimeParse-4 441ns ± 3% 446ns ± 4% +1.21% (p=0.001 n=30+30)
TimeFormat-4 415ns ± 3% 415ns ± 3% ~ (p=0.436 n=30+30)
[Geo mean] 67.0µs 66.9µs -0.17%
name old speed new speed delta
GobDecode-4 107MB/s ± 5% 107MB/s ± 6% ~ (p=0.663 n=30+30)
GobEncode-4 107MB/s ± 6% 108MB/s ± 7% ~ (p=0.117 n=29+30)
Gzip-4 47.0MB/s ± 4% 48.7MB/s ± 4% +3.61% (p=0.000 n=30+30)
Gunzip-4 470MB/s ± 4% 466MB/s ± 4% -1.05% (p=0.011 n=30+30)
JSONEncode-4 95.6MB/s ± 5% 96.7MB/s ± 5% +1.16% (p=0.005 n=30+30)
JSONDecode-4 29.3MB/s ± 4% 28.7MB/s ± 4% -2.17% (p=0.000 n=30+30)
GoParse-4 17.9MB/s ± 2% 17.7MB/s ± 2% -1.06% (p=0.007 n=30+30)
RegexpMatchEasy0_32-4 323MB/s ± 5% 329MB/s ± 4% +1.93% (p=0.006 n=30+30)
RegexpMatchEasy0_1K-4 1.22GB/s ± 3% 1.22GB/s ± 3% ~ (p=0.496 n=30+30)
RegexpMatchEasy1_32-4 298MB/s ± 4% 303MB/s ± 4% +1.84% (p=0.017 n=30+30)
RegexpMatchEasy1_1K-4 995MB/s ± 4% 989MB/s ± 4% ~ (p=0.307 n=30+30)
RegexpMatchMedium_32-4 7.56MB/s ± 4% 7.74MB/s ± 4% +2.46% (p=0.000 n=22+30)
RegexpMatchMedium_1K-4 23.2MB/s ± 4% 23.4MB/s ± 3% ~ (p=0.651 n=30+30)
RegexpMatchHard_32-4 14.2MB/s ± 4% 14.3MB/s ± 4% +1.29% (p=0.021 n=30+30)
RegexpMatchHard_1K-4 15.0MB/s ± 3% 14.9MB/s ± 4% ~ (p=0.069 n=30+29)
Revcomp-4 138MB/s ± 2% 138MB/s ± 2% ~ (p=0.072 n=30+30)
Template-4 28.1MB/s ± 3% 28.4MB/s ± 3% +1.05% (p=0.012 n=30+30)
[Geo mean] 79.7MB/s 80.2MB/s +0.60%
Change-Id: I44a1dfc942c9a385904553c4fe1fa8e509c8aa31
Reviewed-on: https://go-review.googlesource.com/120916
Run-TryBot: Ben Shi <powerman1st@163.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>