Problem 1

(40 Points) Design a MIPS processor supporting only the R-type and the liw rd, rs, rt instructions. The liw rd, rs, rt instruction does the following: The rd register is set to be the memory content at the address obtained by the sum of the values in rs and rt. For example, liw $2, $3, $4 If rs and rt are 4000 and 4800 respectively, rd is set to be the value loaded from memory address 8800. Assume the opcode of R-type is 000000 and that liw is an R-type instruction, but the opcode of liw is 100000.

a) (30 points) Show the data path of this processor using the following components. Add 2-1 MUX when necessary. Beside each group of wires, show the indices of the bits being used.

Problem 1 (40 Points) Design a MIPS processor supporting only the R-type and the liw rd, rs, rt instructions. The liw rd, rs, rt instruction does the following: The rd register is set to be the memory content at the address obtained by the sum of the values in rs and rt For example, liw $2, S3, $4 If rs and rt are 4000 and 4800 respectively, rd is set to be the value loaded from memory address 8800. Assume the opcode of R-type is 000000 and that liw is an R-type instruc- tion, but the opcode of liw is 100000. a) (30 points) Show the data path of this processor using the following components. Add 2-1 MUX when necessary. Beside each group of wires, show the indices of the bits being used. Registers File ALL Memory Memory Problem 1 (40 Points) Design a MIPS processor supporting only the R-type and the liw rd, rs, rt instructions. The liw rd, rs, rt instruction does the following: The rd register is set to be the memory content at the address obtained by the sum of the values in rs and rt For example, liw $2, S3, $4 If rs and rt are 4000 and 4800 respectively, rd is set to be the value loaded from memory address 8800. Assume the opcode of R-type is 000000 and that liw is an R-type instruc- tion, but the opcode of liw is 100000. a) (30 points) Show the data path of this processor using the following components. Add 2-1 MUX when necessary. Beside each group of wires, show the indices of the bits being used. Registers File ALL Memory Memory