TrueCloudLab/tzhash
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Merge pull request #13 from nspcc-dev/fix/cpuid

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Detect CPU features in Sum()
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Evgeniy Kulikov 2019-10-04 18:00:24 +03:00 committed by GitHub
commit 06362477ed
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1 changed files with 13 additions and 3 deletions
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16
tz/hash.go
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@ -70,9 +70,19 @@ func New() hash.Hash {
// Sum returns Tillich-Zémor checksum of data.
func Sum(data []byte) [hashSize]byte {
d := newAVX2Inline()
_, _ = d.Write(data) // no errors
return d.checkSum()
if hasAVX2 {
d := newAVX2Inline()
_, _ = d.Write(data) // no errors
return d.checkSum()
} else if hasAVX {
d := newAVX()
_, _ = d.Write(data) // no errors
return d.checkSum()
} else {
d := newPure()
_, _ = d.Write(data) // no errors
return d.checkSum()
}
}
// Concat performs combining of hashes based on homomorphic property.