Testing Ls:
16'hFFFF << 4'b0000 = 16'b1111111111111111
16'hFFFF << 4'b0001 = 16'b1111111111111110
16'hFFFF << 4'b0010 = 16'b1111111111111100
16'hFFFF << 4'b0011 = 16'b1111111111111000
16'hFFFF << 4'b0100 = 16'b1111111111110000
16'hFFFF << 4'b0101 = 16'b1111111111100000
16'hFFFF << 4'b0110 = 16'b1111111111000000
16'hFFFF << 4'b0111 = 16'b1111111110000000
16'hFFFF << 4'b1000 = 16'b1111111100000000
16'hFFFF << 4'b1001 = 16'b1111111000000000
16'hFFFF << 4'b1010 = 16'b1111110000000000
16'hFFFF << 4'b1011 = 16'b1111100000000000
16'hFFFF << 4'b1100 = 16'b1111000000000000
16'hFFFF << 4'b1101 = 16'b1110000000000000
16'hFFFF << 4'b1110 = 16'b1100000000000000
16'hFFFF << 4'b1111 = 16'b1000000000000000
Testing LsV3:
16'hFFFF << 4'b0000 = 16'b1111111111111111
16'hFFFF << 4'b0001 = 16'b1111111111111110
16'hFFFF << 4'b0010 = 16'b1111111111111100
16'hFFFF << 4'b0011 = 16'b1111111111111000
16'hFFFF << 4'b0100 = 16'b1111111111110000
16'hFFFF << 4'b0101 = 16'b1111111111100000
16'hFFFF << 4'b0110 = 16'b1111111111000000
16'hFFFF << 4'b0111 = 16'b1111111110000000
16'hFFFF << 4'b1000 = 16'b1111111100000000
16'hFFFF << 4'b1001 = 16'b1111111000000000
16'hFFFF << 4'b1010 = 16'b1111110000000000
16'hFFFF << 4'b1011 = 16'b1111100000000000
16'hFFFF << 4'b1100 = 16'b1111000000000000
16'hFFFF << 4'b1101 = 16'b1110000000000000
16'hFFFF << 4'b1110 = 16'b1100000000000000
16'hFFFF << 4'b1111 = 16'b1000000000000000
Done