| commit | 2b50ab2aee75d3c361fcd1eb39e830e2e73056b6 | [log] [tgz] |
|---|---|---|
| author | fanzha02 <fannie.zhang@arm.com> | Mon Dec 07 19:15:15 2020 +0800 |
| committer | fannie zhang <Fannie.Zhang@arm.com> | Tue Mar 02 06:38:07 2021 +0000 |
| tree | 86c8adabbab0b962827eebb995e054fc5ac6098d | |
| parent | ebb92dfed96fadb3c563ff11cead85bbb7536793 [diff] |
cmd/compile: optimize single-precision floating point square root Add generic rule to rewrite the single-precision square root expression with one single-precision instruction. The optimization will reduce two times of precision converting between double-precision and single-precision. On arm64 flatform. previous: FCVTSD F0, F0 FSQRTD F0, F0 FCVTDS F0, F0 optimized: FSQRTS S0, S0 And this patch adds the test case to check the correctness. This patch refers to CL 241877, contributed by Alice Xu (dianhong.xu@arm.com) Change-Id: I6de5d02281c693017ac4bd4c10963dd55989bd7e Reviewed-on: https://go-review.googlesource.com/c/go/+/276873 Trust: fannie zhang <Fannie.Zhang@arm.com> Run-TryBot: fannie zhang <Fannie.Zhang@arm.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Keith Randall <khr@golang.org>
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