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| author | Lynn Boger <laboger@linux.vnet.ibm.com> | 2020-09-23 11:06:39 -0400 |
|---|---|---|
| committer | Lynn Boger <laboger@linux.vnet.ibm.com> | 2020-09-28 18:13:48 +0000 |
| commit | a424f6e45e29960c933a7ccc1cd8fc9bb2766f15 (patch) | |
| tree | ae2e0f78c969a9c6b4fc62b33a7a27974d590943 /test | |
| parent | 874b3132a84cf76da6a48978826c04c380a37a50 (diff) | |
| download | go-a424f6e45e29960c933a7ccc1cd8fc9bb2766f15.tar.gz go-a424f6e45e29960c933a7ccc1cd8fc9bb2766f15.zip | |
cmd/asm,cmd/compile,cmd/internal/obj/ppc64: add extswsli support on power9
This adds support for the extswsli instruction which combines
extsw followed by a shift.
New benchmark demonstrates the improvement:
name old time/op new time/op delta
ExtShift 1.34µs ± 0% 1.30µs ± 0% -3.15% (p=0.057 n=4+3)
Change-Id: I21b410676fdf15d20e0cbbaa75d7c6dcd3bbb7b0
Reviewed-on: https://go-review.googlesource.com/c/go/+/257017
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Carlos Eduardo Seo <carlos.seo@gmail.com>
Trust: Lynn Boger <laboger@linux.vnet.ibm.com>
Diffstat (limited to 'test')
| -rw-r--r-- | test/codegen/shift.go | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/test/codegen/shift.go b/test/codegen/shift.go index 32214851b5..abc4b091c9 100644 --- a/test/codegen/shift.go +++ b/test/codegen/shift.go @@ -182,7 +182,7 @@ func checkUnneededTrunc(tab *[100000]uint32, d uint64, v uint32, h uint16, b byt return f, g } -func checkCombinedShifts(v8 uint8, v16 uint16, v32 uint32, v64 uint64) (uint8, uint16, uint32, uint64) { +func checkCombinedShifts(v8 uint8, v16 uint16, v32 uint32, x32 int32, v64 uint64) (uint8, uint16, uint32, uint64, int64) { // ppc64le:-"AND","CLRLSLWI" // ppc64:-"AND","CLRLSLWI" @@ -202,7 +202,10 @@ func checkCombinedShifts(v8 uint8, v16 uint16, v32 uint32, v64 uint64) (uint8, u // ppc64le:-"AND","CLRLSLDI" // ppc64:-"AND","CLRLSLDI" i := (v64 & 0xFFFFFFFF) << 5 - return f, g, h, i + // ppc64le/power9:-"SLD","EXTSWSLI" + // ppc64/power9:-"SLD","EXTSWSLI" + j := int64(x32+32)*8 + return f, g, h, i, j } func checkWidenAfterShift(v int64, u uint64) (int64, uint64) { |