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| author | Wayne Zuo <wdvxdr@golangcn.org> | 2022-04-08 16:44:13 +0800 |
|---|---|---|
| committer | Gopher Robot <gobot@golang.org> | 2022-04-12 12:59:27 +0000 |
| commit | d6320f1a58f1f7820daee06a086c83a0274a777f (patch) | |
| tree | c1954c75174b257abf202a986f10faed96cacbe1 /test/codegen | |
| parent | 2b31abc5286e4f29f934c4123101feabf0f4aaca (diff) | |
| download | go-d6320f1a58f1f7820daee06a086c83a0274a777f.tar.xz | |
cmd/compile: add SARX instruction for GOAMD64>=3
name old time/op new time/op delta
ShiftArithmeticRight-8 0.68ns ± 5% 0.30ns ± 6% -56.14% (p=0.000 n=10+10)
Change-Id: I052a0d7b9e6526d526276444e588b0cc288beff4
Reviewed-on: https://go-review.googlesource.com/c/go/+/399055
Run-TryBot: Wayne Zuo <wdvxdr@golangcn.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Auto-Submit: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Diffstat (limited to 'test/codegen')
| -rw-r--r-- | test/codegen/bmi.go | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/test/codegen/bmi.go b/test/codegen/bmi.go index 2908d1b796..9dd2b0039c 100644 --- a/test/codegen/bmi.go +++ b/test/codegen/bmi.go @@ -46,6 +46,16 @@ func blsr32(x int32) int32 { return x & (x - 1) } +func sarx64(x, y int64) int64 { + // amd64/v3:"SARXQ" + return x >> y +} + +func sarx32(x, y int32) int32 { + // amd64/v3:"SARXL" + return x >> y +} + func shlrx64(x []uint64, i int, s uint64) uint64 { // amd64/v3: `SHRXQ\t[A-Z]+[0-9]*, \([A-Z]+[0-9]*\)\([A-Z]+[0-9]*\*8\), [A-Z]+[0-9]*` s = x[i] >> i |