cmd/compile: optimize ARM64's code with MADD/MSUB
MADD does MUL-ADD in a single instruction, and MSUB does the
similiar simplification for MUL-SUB.
The CL implements the optimization with MADD/MSUB.
1. The total size of pkg/android_arm64/ decreases about 20KB,
excluding cmd/compile/.
2. The go1 benchmark shows a little improvement for RegexpMatchHard_32-4
and Template-4, excluding noise.
name old time/op new time/op delta
BinaryTree17-4 16.3s ± 1% 16.5s ± 1% +1.41% (p=0.000 n=26+28)
Fannkuch11-4 8.79s ± 1% 8.76s ± 0% -0.36% (p=0.000 n=26+28)
FmtFprintfEmpty-4 172ns ± 0% 172ns ± 0% ~ (all equal)
FmtFprintfString-4 362ns ± 1% 364ns ± 0% +0.55% (p=0.000 n=30+30)
FmtFprintfInt-4 416ns ± 0% 416ns ± 0% ~ (p=0.099 n=22+30)
FmtFprintfIntInt-4 655ns ± 1% 660ns ± 1% +0.76% (p=0.000 n=30+30)
FmtFprintfPrefixedInt-4 810ns ± 0% 809ns ± 0% -0.08% (p=0.009 n=29+29)
FmtFprintfFloat-4 1.08µs ± 0% 1.09µs ± 0% +0.61% (p=0.000 n=30+29)
FmtManyArgs-4 2.70µs ± 0% 2.69µs ± 0% -0.23% (p=0.000 n=29+28)
GobDecode-4 32.2ms ± 1% 32.1ms ± 1% -0.39% (p=0.000 n=27+26)
GobEncode-4 27.4ms ± 2% 27.4ms ± 1% ~ (p=0.864 n=28+28)
Gzip-4 1.53s ± 1% 1.52s ± 1% -0.30% (p=0.031 n=29+29)
Gunzip-4 146ms ± 0% 146ms ± 0% -0.14% (p=0.001 n=25+30)
HTTPClientServer-4 1.00ms ± 4% 0.98ms ± 6% -1.65% (p=0.001 n=29+30)
JSONEncode-4 67.3ms ± 1% 67.2ms ± 1% ~ (p=0.520 n=28+28)
JSONDecode-4 329ms ± 5% 330ms ± 4% ~ (p=0.142 n=30+30)
Mandelbrot200-4 17.3ms ± 0% 17.3ms ± 0% ~ (p=0.055 n=26+29)
GoParse-4 16.9ms ± 1% 17.0ms ± 1% +0.82% (p=0.000 n=30+30)
RegexpMatchEasy0_32-4 382ns ± 0% 382ns ± 0% ~ (all equal)
RegexpMatchEasy0_1K-4 1.33µs ± 0% 1.33µs ± 0% -0.25% (p=0.000 n=30+27)
RegexpMatchEasy1_32-4 361ns ± 0% 361ns ± 0% -0.08% (p=0.002 n=30+28)
RegexpMatchEasy1_1K-4 2.11µs ± 0% 2.09µs ± 0% -0.54% (p=0.000 n=30+29)
RegexpMatchMedium_32-4 594ns ± 0% 592ns ± 0% -0.32% (p=0.000 n=30+30)
RegexpMatchMedium_1K-4 173µs ± 0% 172µs ± 0% -0.77% (p=0.000 n=29+27)
RegexpMatchHard_32-4 10.4µs ± 0% 10.1µs ± 0% -3.63% (p=0.000 n=28+27)
RegexpMatchHard_1K-4 306µs ± 0% 301µs ± 0% -1.64% (p=0.000 n=29+30)
Revcomp-4 2.51s ± 1% 2.52s ± 0% +0.18% (p=0.017 n=26+27)
Template-4 394ms ± 3% 382ms ± 3% -3.22% (p=0.000 n=28+28)
TimeParse-4 1.67µs ± 0% 1.67µs ± 0% +0.05% (p=0.030 n=27+30)
TimeFormat-4 1.72µs ± 0% 1.70µs ± 0% -0.79% (p=0.000 n=28+26)
[Geo mean] 259µs 259µs -0.33%
name old speed new speed delta
GobDecode-4 23.8MB/s ± 1% 23.9MB/s ± 1% +0.40% (p=0.001 n=27+26)
GobEncode-4 28.0MB/s ± 2% 28.0MB/s ± 1% ~ (p=0.863 n=28+28)
Gzip-4 12.7MB/s ± 1% 12.7MB/s ± 1% +0.32% (p=0.026 n=29+29)
Gunzip-4 133MB/s ± 0% 133MB/s ± 0% +0.15% (p=0.001 n=24+30)
JSONEncode-4 28.8MB/s ± 1% 28.9MB/s ± 1% ~ (p=0.475 n=28+28)
JSONDecode-4 5.89MB/s ± 4% 5.87MB/s ± 5% ~ (p=0.174 n=29+30)
GoParse-4 3.43MB/s ± 0% 3.40MB/s ± 1% -0.83% (p=0.000 n=28+30)
RegexpMatchEasy0_32-4 83.6MB/s ± 0% 83.6MB/s ± 0% ~ (p=0.848 n=28+29)
RegexpMatchEasy0_1K-4 768MB/s ± 0% 770MB/s ± 0% +0.25% (p=0.000 n=30+27)
RegexpMatchEasy1_32-4 88.5MB/s ± 0% 88.5MB/s ± 0% ~ (p=0.086 n=29+29)
RegexpMatchEasy1_1K-4 486MB/s ± 0% 489MB/s ± 0% +0.54% (p=0.000 n=30+29)
RegexpMatchMedium_32-4 1.68MB/s ± 0% 1.69MB/s ± 0% +0.60% (p=0.000 n=30+23)
RegexpMatchMedium_1K-4 5.90MB/s ± 0% 5.95MB/s ± 0% +0.85% (p=0.000 n=18+20)
RegexpMatchHard_32-4 3.07MB/s ± 0% 3.18MB/s ± 0% +3.72% (p=0.000 n=29+26)
RegexpMatchHard_1K-4 3.35MB/s ± 0% 3.40MB/s ± 0% +1.69% (p=0.000 n=30+30)
Revcomp-4 101MB/s ± 0% 101MB/s ± 0% -0.18% (p=0.018 n=26+27)
Template-4 4.92MB/s ± 4% 5.09MB/s ± 3% +3.31% (p=0.000 n=28+28)
[Geo mean] 22.4MB/s 22.6MB/s +0.62%
Change-Id: I8f304b272785739f57b3c8f736316f658f8c1b2a
Reviewed-on: https://go-review.googlesource.com/129119
Run-TryBot: Ben Shi <powerman1st@163.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>