Wiring Units

Module: extender

This unit takes an input of one bit width and produces an output of a larger bit width. The intended use is to perform extension task on the immediate portion of instructions. The CTL signal determines how the extension is performed. The module performs the following operations:

zero extension - fills in required bits with 0's
sign extension - maintain the sign of the number
left alignment - make the msb of the input the msb of the output ( equivalent to left-shift by O_WIDTH - I_WIDTH bits)
shift amount extraction - shift the input right 6 bits and mask with 0x1F (extracts the shamt field from R-Format instructions )

Parameters:

Name	Default	Description
`ALIGN_L`	2'b10	Value to input to CTL for left alignment
`DIFF`	16	Difference in width between input and output ports
`GET_SHIFT`	2'b11	Value to input to CTL for getting shift amount
`SIGN_EX`	2'b01	Value to input to CTL for sign extension
`ZERO_EX`	2'b0	Value to input to CTL for zero extension

Port Description:

Name	Dir	Width	Description
`IN`	In	16	input bits
`CTL`	In	2	controls the type of transformation
`OUT`	Out	32	shifted output bits

Wiring Units

Module: extender

Parameters:

Port Description:

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