Suppose a 32-bit instruction takes the two following format: ОРСODE DR SR1 SR2 UNUSED ОРСODE DR SR1 IMM If there are 140 opcodes and 128 registers, a) What is the size (in bits) of each field? b) What is the range of IMM field?
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Machine organization
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- A(n) __________ is a storage location implemented in the CPU.A(n) ____________________ instruction copies data from one memory location to another.A(n) ________________ instruction always alters the instruction execution sequence. A(n) ______________ instruction alters the instruction execution sequence only if a specified Condition is true.
- The time it takes to perform the fetch instruction and decode instruction steps is called the execution time. True or false?When an instruction is first fetched from memory, its placed in the _________________ and then ________________to extract its components.Most Intel CPUs use the __________, in which each memory address is represented by two integers.
- Two 1-bit values generate a 1 result value when a(n) _____ instruction is executed. All other input pairs generate a 0 result value.The contents of a memory location are copied to a register while performing a(n) __________________ operation.(d) The table below shows the ALUcontrol signal of the datapath we discussed in class. Instruction Funct ALU Орсode ALUop ALU action operation field control Iw 00 load word XXXXXX add 0010 Sw 00 store word XXXXXX add 0010 beq 01 branch equal subtract 0110 XXXXXX R-type 10 add 100000 add 0010 R-type 10 subtract 100010 subtract 0110 R-type 10 AND 100100 AND 0000 R-type 10 OR 100101 OR 0001 R-type 10 set on less than 101010 set on less than 0111 You want to add the bne instruction into the datapath, which already includes the required hardware for the instruction. Write out the ALUop for bne and how you can determine whether the bne results in the branch to be taken.
- Using the following data definitions: bytel BYTE byte2 BYTE word1 WORD word2 WORD 3 OFFh, 1, 2 14h OFFFFh, 1, 2 word3 SWORD 7FFFh, 8000h word4 SWORD 9000h dword1 DWORD 10h, 20h, 30h, 40h dArray DWORD 10 DUP (?) Write an instruction that moves the lower 8 bits of word2 into the AL register.Category: CPU Wiring Look at the following (incomplete) diagram of the Hack CPU taken from figure 5.9 of the textbook. ALU output outM instruction AM inM writeM A addressM inc reset PC po Match the wires A, B, C, D and E with the logic expression that describes the signal they should carry. The logic expressions use the operators not (!), and (&&) and or (I). The 16 wire instruction is named instr. The A and C instruction formats are: A-instruction: 0 V. V. V C-instruction: 1 1 1 a c1 c2 c3 c5 c6 d1 d2 d3 j1 j2 j3 Mire number: 15 14 13 12 11 10 9 8 6. 4 3 1 instr[15) && instr[3] B. instr[14] ALUThe loop instructions transfer execution control to another point designated by the instruction pointer. (ip) O (ecx) + sign extended 8-bit displacement (ip) + sign extended 8-bit displacement O (ip) + unsigned 8-bit displacement O (ecx) + unsigned 8-bit displacement