Computer Organization and Design: The Hardware/Software Interface

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1 University of California, Berkeley College of Engineering Computer Science Division EECS Spring 2004 John Kubiatowicz Homework Quiz (HW #3) March 3 rd , 2004 CS152 Computer Architecture and Engineering This quiz covers one of the problems from homework #3. Good Luck! Your Name: SID Number: Discussion Section: Total:
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2 Figure 1: A multicycle data path Figure 1 shows the multicycle datapath from the book. In your homework, you implemented the bcp instruction, which copied a block of words from one location in memory to another. In this problem, we will implement something simpler, namely the block zero ( bzero) instruction: bzero $t1,$t2 {0 mem[t1], 0 mem[t1+4], …, 0 mem[t1+(t2-1)*4]} This instruction zeros a block of memory of size $t2 words , starting at the address in register $t1. The coding of this instruction is as follows: $t1 is in the RT field, $t2 is in the RS field. Problem 1a:
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