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2. (7 points) The following program tries to copy words from the address in register $4 to the address in register $5, counting the number of words copied in register $2. The program stops copying when it finds a word equal to 0. You do not have to preserve the contents of registers $3, $4, and $5. This terminating word should be copied but not counted. Loop: lw $3,0($4) # Read next word from source addi SW $2,$2,1 # Increment count of words copied $3,0($5) # Write to destination addi $4,$4,1 addi $5,$5,1 # Advance pointer to next source # Advance pointer to next destination #goto Loop if word copied = zero bne $3,$0, Loop There multiple bugs in this MIPS program. Fix them and turn in a bug-free version of this program.

2. (7 points) The following program tries to copy words from the address in register $4 to the address in register $5, counting the number of words copied in register $2. The program stops copying when it finds a word equal to 0. You do not have to preserve the contents of registers $3, $4, and $5. This terminating word should be copied but not counted. Loop: lw $3,0($4) # Read next word from source addi SW $2,$2,1 # Increment count of words copied $3,0($5) # Write to destination addi $4,$4,1 addi $5,$5,1 # Advance pointer to next source # Advance pointer to next destination #goto Loop if word copied = zero bne $3,$0, Loop There multiple bugs in this MIPS program. Fix them and turn in a bug-free version of this program.

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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2. (7 points) The following program tries to copy words from the address in register $4 to the address in register $5, counting the number of words copied in register $2. The program stops copying when it finds a word equal to 0. You do not have to preserve the contents of registers $3, $4, and $5. This terminating word should be copied but not counted. Loop: lw $3,0($4) # Read next word from source addi SW $2,$2,1 # Increment count of words copied $3,0($5) # Write to destination addi $4,$4,1 addi $5,$5,1 # Advance pointer to next source # Advance pointer to next destination #goto Loop if word copied = zero bne $3,$0, Loop There multiple bugs in this MIPS program. Fix them and turn in a bug-free version of this program.
Transcribed Image Text:2. (7 points) The following program tries to copy words from the address in register $4 to the address in register $5, counting the number of words copied in register $2. The program stops copying when it finds a word equal to 0. You do not have to preserve the contents of registers $3, $4, and $5. This terminating word should be copied but not counted. Loop: lw $3,0($4) # Read next word from source addi SW $2,$2,1 # Increment count of words copied $3,0($5) # Write to destination addi $4,$4,1 addi $5,$5,1 # Advance pointer to next source # Advance pointer to next destination #goto Loop if word copied = zero bne $3,$0, Loop There multiple bugs in this MIPS program. Fix them and turn in a bug-free version of this program.
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