mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-11-23 20:26:39 +00:00
51 lines
1.2 KiB
Go
51 lines
1.2 KiB
Go
|
// Copyright 2023 Dolthub, Inc.
|
||
|
|
//
|
||
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
// you may not use this file except in compliance with the License.
|
||
|
|
// You may obtain a copy of the License at
|
||
|
|
//
|
||
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
//
|
||
|
|
// Unless required by applicable law or agreed to in writing, software
|
||
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
// See the License for the specific language governing permissions and
|
||
|
|
// limitations under the License.
|
||
|
|
|
||
|
|
//go:build amd64 && !nosimd
|
||
|
|
|
||
|
|
package swiss
|
||
|
|
|
||
|
|
import (
|
||
|
|
"math/bits"
|
||
|
|
_ "unsafe"
|
||
|
|
|
||
|
|
"github.com/dolthub/swiss/simd"
|
||
|
|
)
|
||
|
|
|
||
|
|
const (
|
||
|
|
groupSize = 16
|
||
|
|
maxAvgGroupLoad = 14
|
||
|
|
)
|
||
|
|
|
||
|
|
type bitset uint16
|
||
|
|
|
||
|
|
func metaMatchH2(m *metadata, h h2) bitset {
|
||
|
|
b := simd.MatchMetadata((*[16]int8)(m), int8(h))
|
||
|
|
return bitset(b)
|
||
|
|
}
|
||
|
|
|
||
|
|
func metaMatchEmpty(m *metadata) bitset {
|
||
|
|
b := simd.MatchMetadata((*[16]int8)(m), empty)
|
||
|
|
return bitset(b)
|
||
|
|
}
|
||
|
|
|
||
|
|
func nextMatch(b *bitset) (s uint32) {
|
||
|
|
s = uint32(bits.TrailingZeros16(uint16(*b)))
|
||
|
|
*b &= ^(1 << s) // clear bit |s|
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
//go:linkname fastrand runtime.fastrand
|
||
|
|
func fastrand() uint32
|