Question

please provide the code sequence of the following instruction: a = x * y + b * c for the five types of instruction sets using mips32 (use three registers R1-R3 where applicable)

Answer 1

The MIPS32 instruction set architecture provides several instruction formats, including R-type, I-type, J-type, Load/Store, and Branch instructions. Here's the code sequence for the instruction "a = x * y + b * c" using the MIPS32 instruction set for each type of instruction set:

R-type instruction:

bashCopy codemul R1, $s0, $s1  # Multiply x and y, store result in R1mul R2, $s2, $s3  # Multiply b and c, store result in R2add R3, R1, R2    # Add the results of the previous multiplications, store result in R3sw R3, a          # Store the result in memory location 'a'

I-type instruction:

rCopy codelw R1, x        # Load x into R1lw R2, y        # Load y into R2mul R3, R1, R2  # Multiply x and y, store result in R3lw R1, b        # Load b into R1lw R2, c        # Load c into R2mul R1, R1, R2  # Multiply b and c, store result in R1add R3, R3, R1  # Add the results of the previous multiplications, store result in R3sw R3, a        # Store the result in memory location 'a'

J-type instruction: (J-type instructions are used for jumps and do not apply to this particular instruction)

Load/Store instruction:

rCopy codelw R1, x        # Load x into R1lw R2, y        # Load y into R2mul R3, R1, R2  # Multiply x and y, store result in R3lw R1, b        # Load b into R1lw R2, c        # Load c into R2mul R1, R1, R2  # Multiply b and c, store result in R1add R3, R3, R1  # Add the results of the previous multiplications, store result in R3sw R3, a        # Store the result in memory location 'a'

Branch instruction: (Branch instructions are used for conditional branching and do not apply to this particular instruction)

Note: In the above code sequences, $s0, $s1, $s2, and $s3 represent the registers where the values of x, y, b, and c are stored, respectively. 'lw' stands for load word instruction, 'sw' stands for store word instruction, 'add' stands for add instruction, and 'mul' stands for multiply instruction.