//go:build purego || !(amd64 || arm64 || s390x || ppc64 || ppc64le) package cipher func mul2(tweak *[blockSize]byte, isGB bool) { mul2Generic(tweak, isGB) } func doubleTweaks(tweak *[blockSize]byte, tweaks []byte, isGB bool) { count := len(tweaks) >> 4 for i := 0; i < count; i++ { copy(tweaks[blockSize*i:], tweak[:]) mul2(tweak, isGB) } }