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| author | nimelehin <nimelehin@gmail.com> | 2021-09-15 10:31:05 +0300 |
|---|---|---|
| committer | Keith Randall <khr@golang.org> | 2021-10-05 18:32:12 +0000 |
| commit | 097a82f54d20cb722b8712025caac44c357c1b13 (patch) | |
| tree | b3bddc40205a7fb464a366b5fae37914f03a698a /test/codegen/mathbits.go | |
| parent | 5d946f1892dc4ae3d3220fb0bc4d61cdf6175ee6 (diff) | |
| download | go-097a82f54d20cb722b8712025caac44c357c1b13.tar.xz | |
cmd/compile: don't emit unnecessary amd64 extension checks
In case of amd64 the compiler issues checks if extensions are
available on a platform. With GOAMD64 microarchitecture levels
provided, some of the checks could be eliminated.
Change-Id: If15c178bcae273b2ce7d3673415cb8849292e087
Reviewed-on: https://go-review.googlesource.com/c/go/+/352010
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Diffstat (limited to 'test/codegen/mathbits.go')
| -rw-r--r-- | test/codegen/mathbits.go | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/test/codegen/mathbits.go b/test/codegen/mathbits.go index 50527fea04..2d8790c1de 100644 --- a/test/codegen/mathbits.go +++ b/test/codegen/mathbits.go @@ -118,8 +118,9 @@ func Len8(n uint8) int { // bits.OnesCount // // -------------------- // -// TODO(register args) Restore a m d 6 4 :.*x86HasPOPCNT when only one ABI is tested. +// TODO(register args) Restore a m d 6 4 / v 1 :.*x86HasPOPCNT when only one ABI is tested. func OnesCount(n uint) int { + // amd64/v2:-".*x86HasPOPCNT" amd64/v3:-".*x86HasPOPCNT" // amd64:"POPCNTQ" // arm64:"VCNT","VUADDLV" // s390x:"POPCNT" @@ -130,6 +131,7 @@ func OnesCount(n uint) int { } func OnesCount64(n uint64) int { + // amd64/v2:-".*x86HasPOPCNT" amd64/v3:-".*x86HasPOPCNT" // amd64:"POPCNTQ" // arm64:"VCNT","VUADDLV" // s390x:"POPCNT" @@ -140,6 +142,7 @@ func OnesCount64(n uint64) int { } func OnesCount32(n uint32) int { + // amd64/v2:-".*x86HasPOPCNT" amd64/v3:-".*x86HasPOPCNT" // amd64:"POPCNTL" // arm64:"VCNT","VUADDLV" // s390x:"POPCNT" @@ -150,6 +153,7 @@ func OnesCount32(n uint32) int { } func OnesCount16(n uint16) int { + // amd64/v2:-".*x86HasPOPCNT" amd64/v3:-".*x86HasPOPCNT" // amd64:"POPCNTL" // arm64:"VCNT","VUADDLV" // s390x:"POPCNT" |