4-Bit Barrel Shifter

Intermediate

00:00

Specification

01General Operation

Combinational barrel shifter: shifts i_data left by the number of positions selected by i_shift (0 to 3). Vacant bits on the right are filled with '0'.

Behaviour (truth table):

`i_shift`	`o_data`
`"00"`	`i_data`
`"01"`	`i_data(2 downto 0) & '0'`
`"10"`	`i_data(1 downto 0) & "00"`
`"11"`	`i_data(0) & "000"`

*No clock, no reset: 100% combinational.*

02Interface

i_data

Direction: Input
Width: 4 bits
Description: Input data

i_shift

Direction: Input
Width: 2 bits
Description: Shift amount (0-3)

o_data

Direction: Output
Width: 4 bits
Description: Shifted data

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