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| author | Meng Zhuo <mzh@golangcn.org> | 2021-07-31 10:20:10 +0000 |
|---|---|---|
| committer | Meng Zhuo <mzh@golangcn.org> | 2021-08-17 01:29:37 +0000 |
| commit | 1951afc9193f8e197cb7dfaf6afed70ea02404cb (patch) | |
| tree | aeb457e9d3096d8bbd03bd3d04d183cd05fdbf62 /src/cmd/compile/internal/ssagen | |
| parent | 2a193337164c8af8cba3d5c4ec0f36413c528bd8 (diff) | |
| download | go-1951afc9193f8e197cb7dfaf6afed70ea02404cb.tar.gz go-1951afc9193f8e197cb7dfaf6afed70ea02404cb.zip | |
cmd/compile: lowered MulUintptr on riscv64
According to RISCV instruction set manual v2.2 Sec 6.1
MULHU followed by MUL will be fused into one multiply by microarchitecture
name old time/op new time/op delta
MulUintptr/small 11.2ns ±24% 9.2ns ± 0% -17.54% (p=0.000 n=10+9)
MulUintptr/large 15.9ns ± 0% 10.9ns ± 0% -31.55% (p=0.000 n=8+8)
Change-Id: I3d152218f83948cbc5c576bda29dc86e9b4206ee
Reviewed-on: https://go-review.googlesource.com/c/go/+/338753
Trust: Meng Zhuo <mzh@golangcn.org>
Reviewed-by: Joel Sing <joel@sing.id.au>
Diffstat (limited to 'src/cmd/compile/internal/ssagen')
| -rw-r--r-- | src/cmd/compile/internal/ssagen/ssa.go | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/cmd/compile/internal/ssagen/ssa.go b/src/cmd/compile/internal/ssagen/ssa.go index 237135d5c7..39d3b206ac 100644 --- a/src/cmd/compile/internal/ssagen/ssa.go +++ b/src/cmd/compile/internal/ssagen/ssa.go @@ -3779,7 +3779,7 @@ func InitTables() { } return s.newValue2(ssa.OpMul64uover, types.NewTuple(types.Types[types.TUINT], types.Types[types.TUINT]), args[0], args[1]) }, - sys.AMD64, sys.I386, sys.MIPS64) + sys.AMD64, sys.I386, sys.MIPS64, sys.RISCV64) add("runtime", "KeepAlive", func(s *state, n *ir.CallExpr, args []*ssa.Value) *ssa.Value { data := s.newValue1(ssa.OpIData, s.f.Config.Types.BytePtr, args[0]) |