|author||fanzha02 <firstname.lastname@example.org>||Mon Dec 07 19:15:15 2020 +0800|
|committer||fannie zhang <Fannie.Zhang@arm.com>||Tue Mar 02 06:38:07 2021 +0000|
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 (email@example.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 <firstname.lastname@example.org> Reviewed-by: Keith Randall <email@example.com>
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