P10: Register file

Published

April 3, 2026

Due
2026-04-08T23:59

Goals

Create a critical part of the ARM processor

Objective

For this problem, you will construct a register file for an ARM32 processor. It will contain 16 32-bit registers and will support the ISA we have discussed in class.

Requirements

To make testing easier, please use register_file_starter.circ (right click to save it).

You may create as many subcircuits as you find necessary. However, your main circuit should be in the reg_file subcircuit. If you need to rewire main because you have moved pins in reg_file around, that is fine, but DO NOT rearrange the pins in main.

The circuit will have the follow interface

name	size	direction
Rd	4 bits	in
Rn	4 bits	in
Rm	4 bits	in
Rd_val	32 bits	in
Rn_val	32 bits	out
Rm_val	32 bits	out
new_pc	32 bits	in
we	1 bit	in
clk	1 bit	in
r0	32 bits	out
r1	32 bits	out
r2	32 bits	out
r3	32 bits	out
r4	32 bits	out
r5	32 bits	out
r6	32 bits	out
r7	32 bits	out
r8	32 bits	out
r9	32 bits	out
r10	32 bits	out
r11	32 bits	out
r12	32 bits	out
r13	32 bits	out
r14	32 bits	out
r15	32 bits	out

Rn_val and Rm_val should always show the values stored in Rn and Rm respectively
Registers r0 and r15 should always display the values of the associated registers (primarily for debugging)
On the rising edge of clk, if we is 1, Rd_val should be written into register Rd
On the rising edge of clk, r15 should store the value on new_pc (you can assume that Rd will never be 1111)
You are restricted to the contents of the Wiring, Gates, Plexers, and Memory libraries

Submission

Upload your .circ file to Gradescope.