integer to shift
number of bits to shift
test rotateLeft
t { ubyte b0 = 0b10000001; ubyte b1 = 0b00000011; ubyte b2 = 0b00000110; ubyte b7 = 0b11000000; assert(rotateLeft(b0,0) == b0); assert(rotateLeft(b0,1) == b1); assert(rotateLeft(b0,2) == b2); assert(rotateLeft(b0,7) == b7); assert(rotateLeft(b0,8) == b0
rot shift to the left