The branch datapath (jump is an unconditional branch) uses instructions such as beq $t1, $t2, offset, where offset is a 16-bit offset for computing the branch target address via PC-relative addressing. The beq instruction reads from registers $t1 and $t2, then compares the data obtained from these registers to see if they are equal.

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The control unit sets the datapath signals appropriately so that — registers are read, — ALU output is generated, — data memory is read or written, and — branch target addresses are computed. 3. CSE320 Final Exam Practice Questions Single‐Cycle Datapath/ Multi‐Cycle Datapath Adding instructions Modify the datapath and control signals to perform the new instructions in the corresponding datapath. All of you will be implementing the same datapath, so you will all run into similar problems. Learn from your classmates, and then go apply what you learn to your own design.

Interrupts. 5. 8 Explain how the ALU is used when executing a branch instruction. 9 Datorteknik TopologicalSort bild 9 Branch logic Sgn/Ze extend Zero ext. bild 1 Designing a Single Cycle Datapath & Datapath Control.

Branch (beq) address 15-0 16-bit offset for branch equal, load, and store always in 15-0 72 Main Control Unit • Use fields from instruction to generate control – We will “connect” the fields of the instruction to the datapath via the main control unit 0 31-26 rs 25-21 rt 20-16 rd 15-11 shamt 10-6 funct 5-0 R-type instruction 35 / 43

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What is Branch? If you care about driving app growth and adoption, improving user experiences, or optimizing performance across paid and organic campaigns ,

7 necessary for a branch instruction? 6-5 Chapter 6: Datapath and Control CPSC 352 ARC Instruction Subset ld Load a register from memory Mnemonic Meaning st sethi andcc addcc call jmpl be orcc orncc Store a register into memory Load the 22 most significant bits of a register Bitwise logical AND Add Branch on overflow Call subroutine Jump and link (return from subroutine call) Branch if equal Building the Datapath • Use multiplexorsto stitch them together PC Instruction memory Read address Instruction 16 32 Add ALU result M u x Registers Write register Write data Read data 1 Read data 2 Read register 1 Read register 2 Shift left 2 4 M u x 3 ALU operation RegWrite MemRead MemWrite PCSrc ALUSrc MemtoReg ALU result Zero ALU Data memory Address Write data Read data M u Recently, I have studied Datapath for R-type,load, store, branch Instruction,jump. On control signal session, -Jump-. RegDst : don't care. ALUSrc : don't care. 25-DataPath of Branch Equal (Beq) Instruction in MIPS Architecture|Branch Equal Instruction DataPath.

A data path is the ALU, the set of registers, and the CPU's internal bus(es - Branch: need to compare registers AND need the branch target address - May access data memory - Load/store: access data memory to read/write value - Set address for next instruction fetch: PC branch target OR PC + 4 OR jump target Branch Instruction Datapath Branch instructions: BEQ, J. — Five steps in processor design. Analyze the instruction.
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Memto-. Reg. Reg. Write. Mem. Read.

shift left by 2 ==> 0xFFFFFFEC. then 0xFFFFFFEC + 0x004000B8 ==> 0x1004000A4 ==> 0x004000A4. but my loop starts at 0x004000A0 Conditional Branch RTL Conditional Branch Instruction: CBZ Rd, CondAddr19 Instruction = Mem[PC]; Cond = (Reg[Rd] == 0); if (Cond) PC = PC + SignExtend(CondAddr19)<<2; else PC = PC + 4; 25 3130 29282726 252423 22212019 181716 15141312 11 1009 08070605 040302 0100 Opcode CondAddr19 Rd Add Branch to Datapath (ALU + MEM + Fetch + Branch) What will zero be connected to?
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Sharing Datapath Elements • Share datapath element among instruction classes – E.g., ALU between arithmetic, branch, load/store ALU is shared by arithmetic instruction and load/store instructions 31 Sharing Datapath Elements • Sharing may need to - wire inputs to multiple sources – Pick among possible input sources For arithmetic, ALU

Read data 1. Read data 2.

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Branch ALUOp1 ALUOpO 9 A Complete Datapath with Control 10 Datapath with Control and Jump Instruction 11 Timing: Single Cycle Implementation • Calculate cycle time assuming negligible delays except: – memory (2ns), ALU and adders (2ns), register file access (1ns) MemtoReg MemRead MemWrite ALUOp ALUSrc RegDst PC Instruction˜ memory Read

4. Figure 7.45(b) shows the pipelined datapath formed by inserting four pipeline The branch instruction adds a 24-bit immediate to PC+8 and writes the result (Instruction representation, RTL and Datapath). Maximum PC-relative addressing implies that the branch target address is a signed number of instructions A datapath is a collection of functional units such as arithmetic logic units or multipliers that Speculative · Branch prediction · Memory dependence prediction ALU Zero. RegWrite. Read data 1. Read data 2.

What is Branch? If you care about driving app growth and adoption, improving user experiences, or optimizing performance across paid and organic campaigns ,

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