116 lines
2.8 KiB
Go
116 lines
2.8 KiB
Go
// Copyright 2020-2022 the Blobloom authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//go:build (!amd64 && !arm64) || nounsafe
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// +build !amd64,!arm64 nounsafe
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package blobloom
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import (
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"math/bits"
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"sync/atomic"
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)
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func (f *Filter) intersect(g *Filter) {
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for i := range f.b {
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f.b[i].intersect(&g.b[i])
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}
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}
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func (f *Filter) union(g *Filter) {
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for i := range f.b {
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f.b[i].union(&g.b[i])
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}
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}
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func (b *block) intersect(c *block) {
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b[0] &= c[0]
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b[1] &= c[1]
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b[2] &= c[2]
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b[3] &= c[3]
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b[4] &= c[4]
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b[5] &= c[5]
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b[6] &= c[6]
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b[7] &= c[7]
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b[8] &= c[8]
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b[9] &= c[9]
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b[10] &= c[10]
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b[11] &= c[11]
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b[12] &= c[12]
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b[13] &= c[13]
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b[14] &= c[14]
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b[15] &= c[15]
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}
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func (b *block) union(c *block) {
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b[0] |= c[0]
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b[1] |= c[1]
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b[2] |= c[2]
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b[3] |= c[3]
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b[4] |= c[4]
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b[5] |= c[5]
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b[6] |= c[6]
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b[7] |= c[7]
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b[8] |= c[8]
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b[9] |= c[9]
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b[10] |= c[10]
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b[11] |= c[11]
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b[12] |= c[12]
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b[13] |= c[13]
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b[14] |= c[14]
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b[15] |= c[15]
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}
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func onescount(b *block) (n int) {
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n += bits.OnesCount32(b[0])
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n += bits.OnesCount32(b[1])
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n += bits.OnesCount32(b[2])
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n += bits.OnesCount32(b[3])
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n += bits.OnesCount32(b[4])
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n += bits.OnesCount32(b[5])
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n += bits.OnesCount32(b[6])
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n += bits.OnesCount32(b[7])
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n += bits.OnesCount32(b[8])
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n += bits.OnesCount32(b[9])
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n += bits.OnesCount32(b[10])
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n += bits.OnesCount32(b[11])
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n += bits.OnesCount32(b[12])
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n += bits.OnesCount32(b[13])
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n += bits.OnesCount32(b[14])
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n += bits.OnesCount32(b[15])
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return n
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}
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func onescountAtomic(b *block) (n int) {
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n += bits.OnesCount32(atomic.LoadUint32(&b[0]))
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n += bits.OnesCount32(atomic.LoadUint32(&b[1]))
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n += bits.OnesCount32(atomic.LoadUint32(&b[2]))
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n += bits.OnesCount32(atomic.LoadUint32(&b[3]))
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n += bits.OnesCount32(atomic.LoadUint32(&b[4]))
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n += bits.OnesCount32(atomic.LoadUint32(&b[5]))
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n += bits.OnesCount32(atomic.LoadUint32(&b[6]))
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n += bits.OnesCount32(atomic.LoadUint32(&b[7]))
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n += bits.OnesCount32(atomic.LoadUint32(&b[8]))
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n += bits.OnesCount32(atomic.LoadUint32(&b[9]))
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n += bits.OnesCount32(atomic.LoadUint32(&b[10]))
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n += bits.OnesCount32(atomic.LoadUint32(&b[11]))
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n += bits.OnesCount32(atomic.LoadUint32(&b[12]))
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n += bits.OnesCount32(atomic.LoadUint32(&b[13]))
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n += bits.OnesCount32(atomic.LoadUint32(&b[14]))
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n += bits.OnesCount32(atomic.LoadUint32(&b[15]))
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return n
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}
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