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more compact addChunkChainingValue

This commit is contained in:
lukechampine 2020-01-10 16:35:20 -05:00
parent 4c13e3a25c
commit 37e4314bf1
1 changed files with 3 additions and 6 deletions
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9
blake3.go
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@ -304,16 +304,13 @@ func (h *Hasher) addChunkChainingValue(cv [8]uint32, totalChunks uint64) {
// with the result. After all these merges, push the final value of // with the result. After all these merges, push the final value of
// `cv` onto the stack. The number of completed subtrees is given // `cv` onto the stack. The number of completed subtrees is given
// by the number of trailing 0-bits in the new total number of chunks. // by the number of trailing 0-bits in the new total number of chunks.
right := cv
for totalChunks&1 == 0 { for totalChunks&1 == 0 {
// pop // pop and merge
h.stackSize-- h.stackSize--
left := h.chainStack[h.stackSize] cv = parentNode(h.chainStack[h.stackSize], cv, h.key, h.flags).chainingValue()
// merge
right = parentNode(left, right, h.key, h.flags).chainingValue()
totalChunks >>= 1 totalChunks >>= 1
} }
h.chainStack[h.stackSize] = right h.chainStack[h.stackSize] = cv
h.stackSize++ h.stackSize++
} }