We’re executing the following instruction sequences on a 5-stage MIPS pipeline. Add R8, R9, R10 Lw R14, 0x0020(R12) Or R16, R9, R10 Sw R12, 0x0020(R10) Addi R20, R21, 5 (1) At cycle 5, what action (add, sub, and, or) is ALU performing? (2) At cycle 5, what is the action (read, write, no action) of DM? (3) At cycle 5, which registers are being read out? (4) What is the speedup comparing with the unpipelined execution of the same instruction sequence?
We’re executing the following instruction sequences on a 5-stage MIPS pipeline. Add R8, R9, R10 Lw...
We’re executing the following instruction sequences on a 5-stage MIPS pipeline. Add R8, R9, R10 Lw R14, 0x0020(R12) Or R16, R9, R10 Sw R12, 0x0020(R10) Addi R20, R21, 5 (1) At cycle 5, what action (add, sub, and, or) is ALU performing? (2) At cycle 5, what is the action (read, write, no action) of DM? (3) At cycle 5, which registers are being read out? (4) What is the speedup comparing with the unpipelined execution of the same instruction...
Consider a typical MIPS pipeline with branch penalty 1 cycle (i.e. 1 stall cycle if taken.) For the following MIPS instruction sequence, for branch taken. BEQ R14, R12, L AND R9, R9, R1 OR R8, R12, R2 SW R12, 0x0004 (R10) L: ADD R10, R14, R12 LW R10, 0x0004(R12) branch is taken. instr CC1 CC2 CC3 beq
Consider a typical MIPS pipeline with branch penalty 1 cycle (i.e. 1 stall cycle if taken.) For the following MIPS instruction sequence, branch not taken; BEQ R14, R12, L AND R9, R9, R1 OR R8, R12, R2 SW R12, 0x0004 (R10) L: ADD R10, R14, R12 LW R10, 0x0004(R12) 3. branch is not taken. instr CC1 CC2 CC3 beq
Using graphical representation, show the pipeline execution of the following instructions on the 5-stage pipeline with hazard detection and forwarding as implemented in Lecture 6. Clearly indicate the forwarding path(s) and stall(s). Note: highlight the forwarding path and use bubbles (or O) for stalls. Lw R20, 0x0100(R18) Add R14, R20, R16 Sw R18, 0x0110(R16) Or R12, R14, R20 Lw R18, 0x0100(R12) instr CC1 CC2 CC3 lw
We execute the following instruction sequence (data hazards may exhibit in the sequence) on a MIPS 5-stage pipeline with forwarding and stall features implemented. Draw a graphical representation for the execution of the instruction sequence that clearly shows (1) forwarding path (if any); (2) stall cycles (if any); and (3) total cycles needed for the execution. lw R8, 0x0020(R10) add R9, R8, R10 sw R8, 0x0040(R10)
1. Given the following instruction sequence for the MIPS processor with the standard 5 stage pipeline $10, S0. 4 addi lw S2.0(S10) add sw S2,4(510) $2, $2, $2 Show the data dependences between the instructions above by drawing arrows between dependent instructions (only show true/data dependencies). a. Assuming forwarding support, in what cycle would the store instruction write back to memory? Show the cycle by cycle execution of the instructions as they execute in the pipeline. Also, show any stalls...
Consider a VEX-executing VLIW machine with the following characteristics: The machine supports 4 slots (4-wide machine) with the following resources: 2 memory units each with a load latency of 3 cycles 2 integer-add/sub functional units with a latency of 2 cycle 1 integer-multiply functional unit with a latency of 4 cycles Each functional unit in the machine is pipelined and can be issued a new operation at each cycle. However, the results of an operation are only available after the...
Assume the MIPS instruction subset is redefinied to contain only the following instructions: 1. Assume that our MIPS instruction subset is redefined to contain only the following instructions: Instruction Instruction fetch Register read & ALU operation Data Memory Register write decode 0 ns R-format 2ns 1 ns lw ns l ns 2 ns 5 ns 1 ns ns 1 ns ns 0 0 bne The table lists the times required for each step within each instruction. Recall that with the...
Consider a standard 5-stage MIPS pipeline of the type discussed during the class sessions: IF- ID-EX-M-WB. Assume that forwarding is not implemented and only the hazard detection and stall logic is implemented so that all data dependencies are handled by having the pipeline stall until the register fetch will result in the correct data being fetched. Furthermore, assume that the memory is written/updated in the first half of the clock cycle (i.e. on the rising edge of the clock) and...
Problem 1 (5 points) Using graphical representation, show the pipeline execution of the following instructions on the 5-stage pipeline as given in the Lecture 7. Lxx R20, 0x0100(R18) Add R20, R18, R16 Sw, R22, 0x0110(R16) cc1 CC2 Instr lwy Also answer the following questions: (1) How many cycles needed for the execution of these three instructions? (2) What is ALU doing on cycle 3, 4, 5 respectively? (3) What is the memory action in cycle 4, 5, 6 respectively?