Input array:       3F        3B        7B        21        30        64        15        31
orig. bits:  00111111  00111011  01111011  00100001  00110000  01100100  00010101  00110001
after inext: 00110001  00010101  01100100  00110000  00100001  01111011  00111011  00111111


bits-used:       3         8        12         1         8        16         1         2         1        12
zero-fill:       1        F9       DBD         1        21      3064         0         0         1       531
sign-fill:       1  FFFFFFF9  FFFFFDBD  FFFFFFFF        21      3064         0         0  FFFFFFFF       531