Repeat Problem 10-15 using the RISC CPU with data forwarding in Figure 10-13.

Problem 10-15

Simulate the processing of the program in Problem 10-12 using the RISC CPU with data-hazard stall in Figure 10-12. Give the contents of each pipeline platform and the register file (the latter only whenever a change occurs) for each clock cycle. Initially, R2 contains 00000010₁₆, R4 contains 00000020₁₆, R7 contains 00000030₁₆, and the PC contains 0000000116. Is the data hazard avoided?

 Problem 10-12

For the RISC design, draw the execution diagram for the following RISC program (with the contents of R7 nonzero after the subtraction), and indicate any data or control hazards that are present:

Figure 10-12

Figure 10-13

1 SUB 2 BNZ 3 AND 4 OR R7, R7, R2 R7,000F R8, R7, R4 R4, R8, R2