chessmodule/movegengo

package movegengo

import "math/bits"

// LSB Least Significant Bit
func LSB(x uint64) int {
    return bits.TrailingZeros64(x)
}

// NLSB Next Least Significant Bit
func NLSB(x *uint64, i int) int {
    *x ^= uint64(1) << uint64(i)
    return LSB(*x)
}