In a Branch instruction, if the RegWrite control signal was mistakenly set to 1 instead of...
In a Branch instruction, if the RegWrite control signal was mistakenly set to 1 instead of 0, write the resulting register transfer notation (RTN) for every possible combination of MemtoReg and RegDst.
Homework Answers
R-type instruction writes a register (Reg Write = 1), but neither reads nor writes data memory. When the Branch control signal is 0, the PC is unconditionally replaced with PC + 4; otherwise, the PC is replaced by the branch target if the Zero output of the ALU is also high. The ALUOp fi eld for R-type instructions is set to 10 to indicate that the ALU control should be generated from the funct field. The ALUSrc and ALUOp fields are set to perform the address calculation. The MemRead and MemWrite are set to perform the memory access. Finally, RegDst and RegWrite are set for a load to cause the result to be stored into the rt register. The branch instruction is similar to an R-format operation,since it sends the rs and rt registers to the ALU. The ALUOp fi eld for branch is set for a subtract (ALU control = 01), which is used to test for equality. Notice that the MemtoReg field is irrelevant when the RegWrite signal is 0: since the register is not being written, the value of the data on the register data write port is not used. Thus, the entry MemtoReg in the last two rows is replaced with X for don’t care. Don’t cares can also be added to RegDst when RegWrite is 0. This type of don’t care must be added by the designer, since it depends on knowledge of how the datapath works
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In a Branch instruction, if the RegWrite control signal was
mistakenly set to 1 instead of...
Question 5 0.25 pts What is the value of the MemWrite control signal? Question 6 0.25 pts What is the value of the ALUSrc control signal? Add Add Sum--(1 4 Shift left 1 Branch MemRead Instruction [6-...
Question 5 0.25 pts What is the value of the MemWrite control signal? Question 6 0.25 pts What is the value of the ALUSrc control signal? Add Add Sum--(1 4 Shift left 1 Branch MemRead Instruction [6-0] ControMemtoReg MemWrite ALUSrc RegWrite Instruction [19-15]Read Read register 1 Read Read data! PCaddress Instruction [24-20] Zero ALU ALU result register 2 Instruction 31-0 Instruction [11-7 Read1 Address data | Write Read register daiaALU | M Instruction memory Write data Registers Write Data data...
MCS) Add Addresult ALU Shift left 2 RegDst Branch MemRead MemtoReg Instruction (31-26] Control ALUOP MemWrite...
MCS) Add Addresult ALU Shift left 2 RegDst Branch MemRead MemtoReg Instruction (31-26] Control ALUOP MemWrite ALUS RegWrite PC instruction (25-21] Instruction (20-16) Read address Instruction (31-0) Instruction memory Read register 1 Read Read data 1 register 2 Write Read Zoro ALU ALU result Address Read data instruction (15-11] register data 2 x3) Write data Registers Write Data data memory Instruction 15-01 16 Sign- extend ALU control Instruction (5-0) With regards to the single cycle implementation (as shown in the...
Assume that ‘slt $1, $2, $3’ is executed with the implementation in the picture. Identify the value of the 9-bit control...
Assume that ‘slt $1, $2, $3’ is executed with the implementation
in the picture. Identify the value of the 9-bit control
signals.
Add u X ALU result 4 Add Shift left 2 RegDst Branch MemRead MemtoReg Control ALUOP Instruction [31-26 MemWrite ALUSRC RegWrite Instruction [25-21] Read register 1 Read Read PC address Instruction [20-16] data 1 Read Zero register 2 Instruction ALU ALU 31-0] Instruction memory Read data M Read Address Write result u M Instruction [15-11] register data 2...
Modify the circuit to support a MFCC instruction. MFCC Rd instruction: Move From Condition Codes MFCC copies into the fo...
Modify the circuit to support a MFCC
instruction.
MFCC Rd instruction: Move From Condition Codes
MFCC copies into the four rightmost bits of Rd the values of the
ALU signals Carry (C), Overflow (O), Zero (Z) and Negative (N) as
they were set by the previous R- type instruction. The remaining 28
bits of Rd are set to zero.
Describe the changes and additions needed for the
single-cycle MIPS processor datapath and control to support this
instruction.
Hints:
1) MFCC...
The answer to the table given by teacher is: RegDst-0 Jump-x Branch-1 MemRead-1 MemtoReg-x ALUop-1 MemWrite-x...
The answer to the table given by teacher is:
RegDst-0
Jump-x
Branch-1
MemRead-1
MemtoReg-x
ALUop-1
MemWrite-x
ALUSrc-1 (not sure about this one, please give your answer)
RegWrite-x
x means the signal cannot be set in this instruction.
Could you explain the answer in details?
5. (35 points) We wish to add the single cycle datapath and control. Add an a new instruction im Gump memory) to page. This necessary datapaths and control signals to the attached figure on next new...
(o x Add Addresult ALU Shift left 2 Regst Branch MemRead Instruction (31-26) MemtoReg Controll ALUOP...
(o x Add Addresult ALU Shift left 2 Regst Branch MemRead Instruction (31-26) MemtoReg Controll ALUOP MemWrite ALUSC RogWrite Instruction [25-21] Read register 1 Read Instruction (20-16) Read data 1 register 2 Write Read Instruction (15-11) Write data Registers PC Read address Zoro ALU ALU Instruction (31-0) Instruction memory result Address Read data register data 2 **039 -25 Write Data data memory Instruction (15-01 16 Sign- extend ALU control Instruction 15-01 With regards to the single cycle implementation (as shown...
Add 9 MUX 4 4 Addresult ALU Shift left 2 RegDst Branch MemRead Instruction (31-26) Control...
Add 9 MUX 4 4 Addresult ALU Shift left 2 RegDst Branch MemRead Instruction (31-26) Control Memto Reg ALUOD MemWrite ALUSC RegWrite Instruction [25-21) Read PC Read address register 1 Read Instruction (20-16] MUX1 MUX Zero ALU ALU MUX3 M Instruction (31-0) Instruction memory Road Address data Read data 1 register 2 Write Read register data 2 Write data Registers result Instruction (15-11] Fox SX) Data Write data memory 16 32 Instruction (150) Sign- extend ALU control Instruction (5-0)
*For a clearer view of the datapath* Answer choices for all Consider the MIPS single cycle...
*For a clearer view of the datapath*
Answer choices for all
Consider the MIPS single cycle datapath shown below. Select the correct control signals that will be generated by the control unit for the following instruction: andi $t0,$t1,4 Instruction (25-01 Shin Jump address (31-0) - left 2) 28 PC +4 [31-28) XCS result left 2 RegDst Jump Branch MemRead Instruction (31-26] MemtoReg Control ALUOP MemWrite ALUSrc RegWrite Instruction (25-21] PC Read address Read register 1 Read Instruction (20-16] Read data...
Add EX ALU Add dresult Shift left 2 Regst Branch MomRoad Instruction (31-26) MemtoReg Control ALUOO...
Add EX ALU Add dresult Shift left 2 Regst Branch MomRoad Instruction (31-26) MemtoReg Control ALUOO MemWrite ALUST RegWrite instruction [25-21] Read register 1 Read instruction (20-16) Read data 1 register 2 Write Read data 2 instruction (15-11) register Write data Registers Read address Zero ALU ALU Instruction (31-0) Instruction memory result Address Read data Write Data data memory Instruction (15-01 16 32 Sign- extend ALU control Instruction (5-0) With regards to the single cycle implementation (as shown in the...
How would the multicycle MIPS design support the jr instruction? Show the machine code format and...
How would the multicycle MIPS design support the jr instruction?
Show the machine code format and your solution should describe any
new datapath features and control changes to the finite-state
diagram below (this may include adding new states).
Information for problem1 0 Instruction Fetch 1 Decode/Register Fetch 2 Address Calculation 3 Memory Read 4 Write-back Step 5 Memory Write 6 R-execution 7 R-completion 8 Branch completion 9 Jump completion O Mem Read ALUSelA 0 ALUSelB 01 lorD 0 ALUOp 00...
Question 5 0.25 pts What is the value of the MemWrite control signal? Question 6 0.25 pts What is the value of the ALUSrc control signal? Add Add Sum--(1 4 Shift left 1 Branch MemRead Instruction [6-0] ControMemtoReg MemWrite ALUSrc RegWrite Instruction [19-15]Read Read register 1 Read Read data! PCaddress Instruction [24-20] Zero ALU ALU result register 2 Instruction 31-0 Instruction [11-7 Read1 Address data | Write Read register daiaALU | M Instruction memory Write data Registers Write Data data...
MCS) Add Addresult ALU Shift left 2 RegDst Branch MemRead MemtoReg Instruction (31-26] Control ALUOP MemWrite ALUS RegWrite PC instruction (25-21] Instruction (20-16) Read address Instruction (31-0) Instruction memory Read register 1 Read Read data 1 register 2 Write Read Zoro ALU ALU result Address Read data instruction (15-11] register data 2 x3) Write data Registers Write Data data memory Instruction 15-01 16 Sign- extend ALU control Instruction (5-0) With regards to the single cycle implementation (as shown in the...
Assume that ‘slt $1, $2, $3’ is executed with the implementation
in the picture. Identify the value of the 9-bit control
signals.
Add u X ALU result 4 Add Shift left 2 RegDst Branch MemRead MemtoReg Control ALUOP Instruction [31-26 MemWrite ALUSRC RegWrite Instruction [25-21] Read register 1 Read Read PC address Instruction [20-16] data 1 Read Zero register 2 Instruction ALU ALU 31-0] Instruction memory Read data M Read Address Write result u M Instruction [15-11] register data 2...
Modify the circuit to support a MFCC
instruction.
MFCC Rd instruction: Move From Condition Codes
MFCC copies into the four rightmost bits of Rd the values of the
ALU signals Carry (C), Overflow (O), Zero (Z) and Negative (N) as
they were set by the previous R- type instruction. The remaining 28
bits of Rd are set to zero.
Describe the changes and additions needed for the
single-cycle MIPS processor datapath and control to support this
instruction.
Hints:
1) MFCC...
The answer to the table given by teacher is:
RegDst-0
Jump-x
Branch-1
MemRead-1
MemtoReg-x
ALUop-1
MemWrite-x
ALUSrc-1 (not sure about this one, please give your answer)
RegWrite-x
x means the signal cannot be set in this instruction.
Could you explain the answer in details?
5. (35 points) We wish to add the single cycle datapath and control. Add an a new instruction im Gump memory) to page. This necessary datapaths and control signals to the attached figure on next new...
(o x Add Addresult ALU Shift left 2 Regst Branch MemRead Instruction (31-26) MemtoReg Controll ALUOP MemWrite ALUSC RogWrite Instruction [25-21] Read register 1 Read Instruction (20-16) Read data 1 register 2 Write Read Instruction (15-11) Write data Registers PC Read address Zoro ALU ALU Instruction (31-0) Instruction memory result Address Read data register data 2 **039 -25 Write Data data memory Instruction (15-01 16 Sign- extend ALU control Instruction 15-01 With regards to the single cycle implementation (as shown...
Add 9 MUX 4 4 Addresult ALU Shift left 2 RegDst Branch MemRead Instruction (31-26) Control Memto Reg ALUOD MemWrite ALUSC RegWrite Instruction [25-21) Read PC Read address register 1 Read Instruction (20-16] MUX1 MUX Zero ALU ALU MUX3 M Instruction (31-0) Instruction memory Road Address data Read data 1 register 2 Write Read register data 2 Write data Registers result Instruction (15-11] Fox SX) Data Write data memory 16 32 Instruction (150) Sign- extend ALU control Instruction (5-0)
*For a clearer view of the datapath*
Answer choices for all
Consider the MIPS single cycle datapath shown below. Select the correct control signals that will be generated by the control unit for the following instruction: andi $t0,$t1,4 Instruction (25-01 Shin Jump address (31-0) - left 2) 28 PC +4 [31-28) XCS result left 2 RegDst Jump Branch MemRead Instruction (31-26] MemtoReg Control ALUOP MemWrite ALUSrc RegWrite Instruction (25-21] PC Read address Read register 1 Read Instruction (20-16] Read data...
Add EX ALU Add dresult Shift left 2 Regst Branch MomRoad Instruction (31-26) MemtoReg Control ALUOO MemWrite ALUST RegWrite instruction [25-21] Read register 1 Read instruction (20-16) Read data 1 register 2 Write Read data 2 instruction (15-11) register Write data Registers Read address Zero ALU ALU Instruction (31-0) Instruction memory result Address Read data Write Data data memory Instruction (15-01 16 32 Sign- extend ALU control Instruction (5-0) With regards to the single cycle implementation (as shown in the...
How would the multicycle MIPS design support the jr instruction?
Show the machine code format and your solution should describe any
new datapath features and control changes to the finite-state
diagram below (this may include adding new states).
Information for problem1 0 Instruction Fetch 1 Decode/Register Fetch 2 Address Calculation 3 Memory Read 4 Write-back Step 5 Memory Write 6 R-execution 7 R-completion 8 Branch completion 9 Jump completion O Mem Read ALUSelA 0 ALUSelB 01 lorD 0 ALUOp 00...
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