mirror of https://github.com/docker/cli.git
vendor: github.com/cespare/xxhash v2.1.2
intermediate bump for easier review full diff: https://github.com/cespare/xxhash/compare/v2.1.1...v2.1.2 Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This commit is contained in:
parent
7eba0dad8c
commit
2b7cb5b1bf
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@ -8,6 +8,7 @@ go 1.16
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require (
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github.com/Microsoft/go-winio v0.5.1 // indirect
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github.com/cespare/xxhash/v2 v2.1.2 // indirect
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github.com/containerd/containerd v1.5.10
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github.com/coreos/etcd v3.3.27+incompatible // indirect
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github.com/creack/pty v1.1.11
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@ -97,8 +97,9 @@ github.com/bugsnag/panicwrap v0.0.0-20151223152923-e2c28503fcd0 h1:nvj0OLI3YqYXe
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github.com/bugsnag/panicwrap v0.0.0-20151223152923-e2c28503fcd0/go.mod h1:D/8v3kj0zr8ZAKg1AQ6crr+5VwKN5eIywRkfhyM/+dE=
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github.com/cenkalti/backoff/v4 v4.1.1/go.mod h1:scbssz8iZGpm3xbr14ovlUdkxfGXNInqkPWOWmG2CLw=
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github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
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github.com/cespare/xxhash/v2 v2.1.1 h1:6MnRN8NT7+YBpUIWxHtefFZOKTAPgGjpQSxqLNn0+qY=
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github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
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github.com/cespare/xxhash/v2 v2.1.2 h1:YRXhKfTDauu4ajMg1TPgFO5jnlC2HCbmLXMcTG5cbYE=
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github.com/cespare/xxhash/v2 v2.1.2/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
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github.com/checkpoint-restore/go-criu/v4 v4.1.0/go.mod h1:xUQBLp4RLc5zJtWY++yjOoMoB5lihDt7fai+75m+rGw=
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github.com/checkpoint-restore/go-criu/v5 v5.0.0/go.mod h1:cfwC0EG7HMUenopBsUf9d89JlCLQIfgVcNsNN0t6T2M=
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github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
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@ -1,8 +0,0 @@
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language: go
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go:
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- "1.x"
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- master
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env:
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- TAGS=""
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- TAGS="-tags purego"
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script: go test $TAGS -v ./...
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@ -1,7 +1,7 @@
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# xxhash
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[![GoDoc](https://godoc.org/github.com/cespare/xxhash?status.svg)](https://godoc.org/github.com/cespare/xxhash)
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[![Build Status](https://travis-ci.org/cespare/xxhash.svg?branch=master)](https://travis-ci.org/cespare/xxhash)
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[![Go Reference](https://pkg.go.dev/badge/github.com/cespare/xxhash/v2.svg)](https://pkg.go.dev/github.com/cespare/xxhash/v2)
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[![Test](https://github.com/cespare/xxhash/actions/workflows/test.yml/badge.svg)](https://github.com/cespare/xxhash/actions/workflows/test.yml)
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xxhash is a Go implementation of the 64-bit
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[xxHash](http://cyan4973.github.io/xxHash/) algorithm, XXH64. This is a
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@ -64,4 +64,6 @@ $ go test -benchtime 10s -bench '/xxhash,direct,bytes'
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- [InfluxDB](https://github.com/influxdata/influxdb)
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- [Prometheus](https://github.com/prometheus/prometheus)
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- [VictoriaMetrics](https://github.com/VictoriaMetrics/VictoriaMetrics)
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- [FreeCache](https://github.com/coocood/freecache)
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- [FastCache](https://github.com/VictoriaMetrics/fastcache)
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@ -193,7 +193,6 @@ func (d *Digest) UnmarshalBinary(b []byte) error {
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b, d.v4 = consumeUint64(b)
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b, d.total = consumeUint64(b)
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copy(d.mem[:], b)
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b = b[len(d.mem):]
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d.n = int(d.total % uint64(len(d.mem)))
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return nil
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}
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@ -6,7 +6,7 @@
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// Register allocation:
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// AX h
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// CX pointer to advance through b
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// SI pointer to advance through b
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// DX n
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// BX loop end
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// R8 v1, k1
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@ -16,39 +16,39 @@
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// R12 tmp
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// R13 prime1v
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// R14 prime2v
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// R15 prime4v
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// DI prime4v
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// round reads from and advances the buffer pointer in CX.
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// round reads from and advances the buffer pointer in SI.
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// It assumes that R13 has prime1v and R14 has prime2v.
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#define round(r) \
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MOVQ (CX), R12 \
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ADDQ $8, CX \
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MOVQ (SI), R12 \
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ADDQ $8, SI \
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IMULQ R14, R12 \
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ADDQ R12, r \
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ROLQ $31, r \
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IMULQ R13, r
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// mergeRound applies a merge round on the two registers acc and val.
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// It assumes that R13 has prime1v, R14 has prime2v, and R15 has prime4v.
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// It assumes that R13 has prime1v, R14 has prime2v, and DI has prime4v.
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#define mergeRound(acc, val) \
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IMULQ R14, val \
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ROLQ $31, val \
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IMULQ R13, val \
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XORQ val, acc \
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IMULQ R13, acc \
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ADDQ R15, acc
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ADDQ DI, acc
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// func Sum64(b []byte) uint64
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TEXT ·Sum64(SB), NOSPLIT, $0-32
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// Load fixed primes.
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MOVQ ·prime1v(SB), R13
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MOVQ ·prime2v(SB), R14
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MOVQ ·prime4v(SB), R15
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MOVQ ·prime4v(SB), DI
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// Load slice.
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MOVQ b_base+0(FP), CX
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MOVQ b_base+0(FP), SI
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MOVQ b_len+8(FP), DX
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LEAQ (CX)(DX*1), BX
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LEAQ (SI)(DX*1), BX
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// The first loop limit will be len(b)-32.
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SUBQ $32, BX
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XORQ R11, R11
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SUBQ R13, R11
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// Loop until CX > BX.
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// Loop until SI > BX.
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blockLoop:
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round(R8)
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round(R9)
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round(R10)
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round(R11)
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CMPQ CX, BX
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CMPQ SI, BX
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JLE blockLoop
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MOVQ R8, AX
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afterBlocks:
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ADDQ DX, AX
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// Right now BX has len(b)-32, and we want to loop until CX > len(b)-8.
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// Right now BX has len(b)-32, and we want to loop until SI > len(b)-8.
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ADDQ $24, BX
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CMPQ CX, BX
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CMPQ SI, BX
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JG fourByte
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wordLoop:
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// Calculate k1.
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MOVQ (CX), R8
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ADDQ $8, CX
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MOVQ (SI), R8
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ADDQ $8, SI
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IMULQ R14, R8
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ROLQ $31, R8
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IMULQ R13, R8
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XORQ R8, AX
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ROLQ $27, AX
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IMULQ R13, AX
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ADDQ R15, AX
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ADDQ DI, AX
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CMPQ CX, BX
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CMPQ SI, BX
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JLE wordLoop
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fourByte:
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ADDQ $4, BX
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CMPQ CX, BX
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CMPQ SI, BX
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JG singles
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MOVL (CX), R8
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ADDQ $4, CX
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MOVL (SI), R8
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ADDQ $4, SI
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IMULQ R13, R8
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XORQ R8, AX
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singles:
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ADDQ $4, BX
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CMPQ CX, BX
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CMPQ SI, BX
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JGE finalize
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singlesLoop:
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MOVBQZX (CX), R12
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ADDQ $1, CX
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MOVBQZX (SI), R12
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ADDQ $1, SI
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IMULQ ·prime5v(SB), R12
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XORQ R12, AX
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ROLQ $11, AX
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IMULQ R13, AX
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CMPQ CX, BX
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CMPQ SI, BX
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JL singlesLoop
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finalize:
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MOVQ ·prime2v(SB), R14
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// Load slice.
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MOVQ b_base+8(FP), CX
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MOVQ b_base+8(FP), SI
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MOVQ b_len+16(FP), DX
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LEAQ (CX)(DX*1), BX
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LEAQ (SI)(DX*1), BX
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SUBQ $32, BX
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// Load vN from d.
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round(R10)
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round(R11)
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CMPQ CX, BX
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CMPQ SI, BX
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JLE blockLoop
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// Copy vN back to d.
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MOVQ R10, 16(AX)
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MOVQ R11, 24(AX)
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// The number of bytes written is CX minus the old base pointer.
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SUBQ b_base+8(FP), CX
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MOVQ CX, ret+32(FP)
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// The number of bytes written is SI minus the old base pointer.
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SUBQ b_base+8(FP), SI
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MOVQ SI, ret+32(FP)
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RET
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package xxhash
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import (
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"reflect"
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"unsafe"
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)
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// Notes:
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//
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// See https://groups.google.com/d/msg/golang-nuts/dcjzJy-bSpw/tcZYBzQqAQAJ
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// for some discussion about these unsafe conversions.
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//
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// In the future it's possible that compiler optimizations will make these
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// unsafe operations unnecessary: https://golang.org/issue/2205.
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// XxxString functions unnecessary by realizing that calls such as
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// Sum64([]byte(s)) don't need to copy s. See https://golang.org/issue/2205.
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// If that happens, even if we keep these functions they can be replaced with
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// the trivial safe code.
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// NOTE: The usual way of doing an unsafe string-to-[]byte conversion is:
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//
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// Both of these wrapper functions still incur function call overhead since they
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// will not be inlined. We could write Go/asm copies of Sum64 and Digest.Write
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// for strings to squeeze out a bit more speed. Mid-stack inlining should
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// eventually fix this.
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// var b []byte
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// bh := (*reflect.SliceHeader)(unsafe.Pointer(&b))
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// bh.Data = (*reflect.StringHeader)(unsafe.Pointer(&s)).Data
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// bh.Len = len(s)
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// bh.Cap = len(s)
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//
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// Unfortunately, as of Go 1.15.3 the inliner's cost model assigns a high enough
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// weight to this sequence of expressions that any function that uses it will
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// not be inlined. Instead, the functions below use a different unsafe
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// conversion designed to minimize the inliner weight and allow both to be
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// inlined. There is also a test (TestInlining) which verifies that these are
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// inlined.
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//
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// See https://github.com/golang/go/issues/42739 for discussion.
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// Sum64String computes the 64-bit xxHash digest of s.
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// It may be faster than Sum64([]byte(s)) by avoiding a copy.
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func Sum64String(s string) uint64 {
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var b []byte
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bh := (*reflect.SliceHeader)(unsafe.Pointer(&b))
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bh.Data = (*reflect.StringHeader)(unsafe.Pointer(&s)).Data
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bh.Len = len(s)
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bh.Cap = len(s)
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b := *(*[]byte)(unsafe.Pointer(&sliceHeader{s, len(s)}))
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return Sum64(b)
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}
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// WriteString adds more data to d. It always returns len(s), nil.
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// It may be faster than Write([]byte(s)) by avoiding a copy.
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func (d *Digest) WriteString(s string) (n int, err error) {
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var b []byte
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bh := (*reflect.SliceHeader)(unsafe.Pointer(&b))
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bh.Data = (*reflect.StringHeader)(unsafe.Pointer(&s)).Data
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bh.Len = len(s)
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bh.Cap = len(s)
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return d.Write(b)
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d.Write(*(*[]byte)(unsafe.Pointer(&sliceHeader{s, len(s)})))
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// d.Write always returns len(s), nil.
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// Ignoring the return output and returning these fixed values buys a
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// savings of 6 in the inliner's cost model.
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return len(s), nil
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}
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// sliceHeader is similar to reflect.SliceHeader, but it assumes that the layout
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// of the first two words is the same as the layout of a string.
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type sliceHeader struct {
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s string
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cap int
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}
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@ -7,7 +7,8 @@ github.com/Microsoft/go-winio
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github.com/Microsoft/go-winio/pkg/guid
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# github.com/beorn7/perks v1.0.1
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github.com/beorn7/perks/quantile
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# github.com/cespare/xxhash/v2 v2.1.1
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# github.com/cespare/xxhash/v2 v2.1.2
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## explicit
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github.com/cespare/xxhash/v2
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# github.com/containerd/containerd v1.5.10
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## explicit
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Loading…
Reference in New Issue