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Split g() into 2 inlines funcs. 

Eliminates calls & BC in round
This commit is contained in:
renthraysk 2020-01-10 17:37:31 +00:00 committed by lukechampine
parent fd30fee094
commit 07853371e5
1 changed files with 30 additions and 20 deletions
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50
blake3.go
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@ -9,6 +9,7 @@ import (
"errors"
"hash"
"io"
"math/bits"
)
const (
@ -32,31 +33,40 @@ var iv = [8]uint32{
0x510E527F, 0x9B05688C, 0x1F83D9AB, 0x5BE0CD19,
}
func g(state *[16]uint32, a, b, c, d int, mx, my uint32) {
rotr := func(x uint32, n int) uint32 {
return (x >> n) | (x << (32 - n))
}
state[a] = state[a] + state[b] + mx
state[d] = rotr(state[d]^state[a], 16)
state[c] = state[c] + state[d]
state[b] = rotr(state[b]^state[c], 12)
state[a] = state[a] + state[b] + my
state[d] = rotr(state[d]^state[a], 8)
state[c] = state[c] + state[d]
state[b] = rotr(state[b]^state[c], 7)
func gx(state *[16]uint32, a, b, c, d int, mx uint32) {
state[a] += state[b] + mx
state[d] = bits.RotateLeft32(state[d]^state[a], -16)
state[c] += state[d]
state[b] = bits.RotateLeft32(state[b]^state[c], -12)
}
func gy(state *[16]uint32, a, b, c, d int, my uint32) {
state[a] += state[b] + my
state[d] = bits.RotateLeft32(state[d]^state[a], -8)
state[c] += state[d]
state[b] = bits.RotateLeft32(state[b]^state[c], -7)
}
func round(state *[16]uint32, m *[16]uint32) {
// Mix the columns.
g(state, 0, 4, 8, 12, m[0], m[1])
g(state, 1, 5, 9, 13, m[2], m[3])
g(state, 2, 6, 10, 14, m[4], m[5])
g(state, 3, 7, 11, 15, m[6], m[7])
gx(state, 0, 4, 8, 12, m[0])
gy(state, 0, 4, 8, 12, m[1])
gx(state, 1, 5, 9, 13, m[2])
gy(state, 1, 5, 9, 13, m[3])
gx(state, 2, 6, 10, 14, m[4])
gy(state, 2, 6, 10, 14, m[5])
gx(state, 3, 7, 11, 15, m[6])
gy(state, 3, 7, 11, 15, m[7])
// Mix the diagonals.
g(state, 0, 5, 10, 15, m[8], m[9])
g(state, 1, 6, 11, 12, m[10], m[11])
g(state, 2, 7, 8, 13, m[12], m[13])
g(state, 3, 4, 9, 14, m[14], m[15])
gx(state, 0, 5, 10, 15, m[8])
gy(state, 0, 5, 10, 15, m[9])
gx(state, 1, 6, 11, 12, m[10])
gy(state, 1, 6, 11, 12, m[11])
gx(state, 2, 7, 8, 13, m[12])
gy(state, 2, 7, 8, 13, m[13])
gx(state, 3, 4, 9, 14, m[14])
gy(state, 3, 4, 9, 14, m[15])
}
func permute(m *[16]uint32) {