Computer Architecture question:

3. The diagram below is that of the ARM Cortex M3 processor. Answer the following questions: A) Notice that there is a shifter in front of the ALU. What sort of assembly level instructions might this allow? B) There is a multiply and divide block that is separate from the ALU. Why? C) There are lines marked Branch Forwarding and Branch Speculation. What are these? Fetch Decode Execute Addressphase phase and load store and branch AGU Multiply and WR Instruction decode and register read divide Fetch ALU and branch Shift BranchI Branch forwarding and speculation ALU branch not forwarded/speculated LSU branch result AGU- address generation unit Figure 16.13 ARM Cortex-M3 Pipeline 3. The diagram below is that of the ARM Cortex M3 processor. Answer the following questions: A) Notice that there is a shifter in front of the ALU. What sort of assembly level instructions might this allow? B) There is a multiply and divide block that is separate from the ALU. Why? C) There are lines marked Branch Forwarding and Branch Speculation. What are these? Fetch Decode Execute Addressphase phase and load store and branch AGU Multiply and WR Instruction decode and register read divide Fetch ALU and branch Shift BranchI Branch forwarding and speculation ALU branch not forwarded/speculated LSU branch result AGU- address generation unit Figure 16.13 ARM Cortex-M3 Pipeline