c02fc1605a
Use "STP (ZR, ZR), O(R)" instead of "MOVD ZR, O(R)" to implement memory clearing. Also improve assembler supports to STP/LDP. Results (A57@2GHzx8): benchmark old ns/op new ns/op delta BenchmarkClearFat8-8 1.00 1.00 +0.00% BenchmarkClearFat12-8 1.01 1.01 +0.00% BenchmarkClearFat16-8 1.01 1.01 +0.00% BenchmarkClearFat24-8 1.52 1.52 +0.00% BenchmarkClearFat32-8 3.00 2.02 -32.67% BenchmarkClearFat40-8 3.50 2.52 -28.00% BenchmarkClearFat48-8 3.50 3.03 -13.43% BenchmarkClearFat56-8 4.00 3.50 -12.50% BenchmarkClearFat64-8 4.25 4.00 -5.88% BenchmarkClearFat128-8 8.01 8.01 +0.00% BenchmarkClearFat256-8 16.1 16.0 -0.62% BenchmarkClearFat512-8 32.1 32.0 -0.31% BenchmarkClearFat1024-8 64.1 64.1 +0.00% Change-Id: Ie5f5eac271ff685884775005825f206167a5c146 Reviewed-on: https://go-review.googlesource.com/55610 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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The Go Programming Language
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