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package bswap
import _ "github.com/segmentio/asm/cpu"
// Swap64 performs an in-place byte swap on each 64 bits elements in b.
//
// This function is useful when dealing with big-endian input; by converting it
// to little-endian, the data can then be compared using native CPU instructions
// instead of having to employ often slower byte comparison algorithms.
func Swap64(b []byte) {
if len(b)%8 != 0 {
panic("swap64 expects the input to contain full 64 bits elements")
}
swap64(b)
}
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