| commit | c430adf1362dbe4c150cba98214fd521d0e9933a | [log] [tgz] |
|---|---|---|
| author | fanzha02 <fannie.zhang@arm.com> | Thu Jul 12 03:23:21 2018 +0000 |
| committer | Cherry Zhang <cherryyz@google.com> | Wed Sep 05 14:47:02 2018 +0000 |
| tree | f92a8f20e56ae5ac08b462541361cea77d6da6e7 | |
| parent | 81957dd58ee3a4c31f949e49e03d8ff9151ccef5 [diff] |
cmd/internal/obj/arm64: encode float constants into FMOVS/FMOVD instructions Current assembler rewrites float constants to values stored in memory except 0.0, which is not performant. This patch uses the FMOVS/FMOVD instructions to move some available floating-point immediate constants into SIMD&FP destination registers. These available constants can be encoded into FMOVS/FMOVD instructions, checked by the chipfloat7() function. go1 benchmark results. name old time/op new time/op delta BinaryTree17-8 6.27s ± 1% 6.27s ± 1% ~ (p=0.762 n=10+8) Fannkuch11-8 5.42s ± 1% 5.38s ± 0% -0.63% (p=0.000 n=10+10) FmtFprintfEmpty-8 92.9ns ± 1% 93.4ns ± 0% +0.47% (p=0.004 n=9+8) FmtFprintfString-8 169ns ± 2% 170ns ± 4% ~ (p=0.378 n=10+10) FmtFprintfInt-8 197ns ± 1% 196ns ± 1% -0.77% (p=0.009 n=10+9) FmtFprintfIntInt-8 284ns ± 1% 286ns ± 1% ~ (p=0.051 n=10+10) FmtFprintfPrefixedInt-8 419ns ± 0% 422ns ± 1% +0.69% (p=0.038 n=6+10) FmtFprintfFloat-8 458ns ± 0% 463ns ± 1% +1.14% (p=0.000 n=10+10) FmtManyArgs-8 1.35µs ± 2% 1.36µs ± 1% +0.91% (p=0.043 n=10+10) GobDecode-8 16.0ms ± 2% 15.5ms ± 1% -3.39% (p=0.000 n=10+10) GobEncode-8 11.9ms ± 3% 11.4ms ± 1% -3.98% (p=0.000 n=10+9) Gzip-8 621ms ± 0% 625ms ± 0% +0.59% (p=0.000 n=9+10) Gunzip-8 74.0ms ± 1% 74.3ms ± 0% ~ (p=0.059 n=9+8) HTTPClientServer-8 116µs ± 1% 116µs ± 1% ~ (p=0.165 n=10+10) JSONEncode-8 29.3ms ± 1% 29.5ms ± 0% +0.72% (p=0.001 n=10+10) JSONDecode-8 145ms ± 1% 148ms ± 2% +2.06% (p=0.000 n=10+10) Mandelbrot200-8 9.67ms ± 0% 9.48ms ± 1% -1.92% (p=0.000 n=8+10) GoParse-8 7.55ms ± 0% 7.60ms ± 0% +0.57% (p=0.000 n=9+10) RegexpMatchEasy0_32-8 234ns ± 0% 210ns ± 0% -10.13% (p=0.000 n=8+10) RegexpMatchEasy0_1K-8 753ns ± 1% 729ns ± 0% -3.17% (p=0.000 n=10+8) RegexpMatchEasy1_32-8 225ns ± 0% 224ns ± 0% -0.44% (p=0.000 n=9+9) RegexpMatchEasy1_1K-8 1.03µs ± 0% 1.04µs ± 1% +1.29% (p=0.000 n=10+10) RegexpMatchMedium_32-8 320ns ± 3% 296ns ± 6% -7.50% (p=0.000 n=10+10) RegexpMatchMedium_1K-8 77.0µs ± 5% 73.6µs ± 1% ~ (p=0.393 n=10+10) RegexpMatchHard_32-8 3.93µs ± 0% 3.89µs ± 1% -0.95% (p=0.000 n=10+9) RegexpMatchHard_1K-8 120µs ± 5% 115µs ± 1% ~ (p=0.739 n=10+10) Revcomp-8 1.07s ± 0% 1.08s ± 1% +0.63% (p=0.000 n=10+9) Template-8 165ms ± 1% 163ms ± 1% -1.05% (p=0.001 n=8+10) TimeParse-8 751ns ± 1% 749ns ± 1% ~ (p=0.209 n=10+10) TimeFormat-8 759ns ± 1% 751ns ± 1% -0.96% (p=0.001 n=10+10) name old speed new speed delta GobDecode-8 48.0MB/s ± 2% 49.6MB/s ± 1% +3.50% (p=0.000 n=10+10) GobEncode-8 64.5MB/s ± 3% 67.1MB/s ± 1% +4.08% (p=0.000 n=10+9) Gzip-8 31.2MB/s ± 0% 31.1MB/s ± 0% -0.55% (p=0.000 n=9+8) Gunzip-8 262MB/s ± 1% 261MB/s ± 0% ~ (p=0.059 n=9+8) JSONEncode-8 66.3MB/s ± 1% 65.8MB/s ± 0% -0.72% (p=0.001 n=10+10) JSONDecode-8 13.4MB/s ± 1% 13.2MB/s ± 1% -2.02% (p=0.000 n=10+10) GoParse-8 7.67MB/s ± 0% 7.63MB/s ± 0% -0.57% (p=0.000 n=9+10) RegexpMatchEasy0_32-8 136MB/s ± 0% 152MB/s ± 0% +11.45% (p=0.000 n=10+10) RegexpMatchEasy0_1K-8 1.36GB/s ± 1% 1.40GB/s ± 0% +3.25% (p=0.000 n=10+8) RegexpMatchEasy1_32-8 142MB/s ± 0% 143MB/s ± 0% +0.35% (p=0.000 n=10+9) RegexpMatchEasy1_1K-8 992MB/s ± 0% 980MB/s ± 1% -1.27% (p=0.000 n=10+10) RegexpMatchMedium_32-8 3.12MB/s ± 3% 3.38MB/s ± 6% +8.17% (p=0.000 n=10+10) RegexpMatchMedium_1K-8 13.3MB/s ± 5% 13.9MB/s ± 1% ~ (p=0.362 n=10+10) RegexpMatchHard_32-8 8.14MB/s ± 0% 8.21MB/s ± 1% +0.95% (p=0.000 n=10+9) RegexpMatchHard_1K-8 8.54MB/s ± 5% 8.90MB/s ± 1% ~ (p=0.636 n=10+10) Revcomp-8 238MB/s ± 0% 236MB/s ± 1% -0.63% (p=0.000 n=10+9) Template-8 11.8MB/s ± 1% 11.9MB/s ± 1% +1.07% (p=0.001 n=8+10) Change-Id: I57b372d8dcd47e6aec39893843b20385d5d9c37e Reviewed-on: https://go-review.googlesource.com/129555 Run-TryBot: Cherry Zhang <cherryyz@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com>
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