Logic Statements in MIPS

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San Diego State University *

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240

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Electrical Engineering

Date

Jan 9, 2024

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pdf

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2

Uploaded by ConstableRam18621 on coursehero.com

1. Write a code fragment to multiply the content of register $t0 with 8 without using mult or mul instruction. li $t0, 3 sll $t0, $t0, 3 # 2^3 = 8 2. Write a code fragment to multiply the content of register $t0 with 80 without using mult or mul instruction. sll $t1, $t0, 4 # Multiply previous result ($t1) by 8 sll $t2, $t1, 3 # Subtract 48 from $t2 to get 80 subu $t0, $t2, 48 3. Write a code fragment to clear bits 2, 4, 6, and 7 of the register $t2. Store the result in $s0 li $t2, 0x199 # 8 bits set li $s0, 0010 1101 not $s0, $s0 and $s0, $t2, $s0 # Clear bits 4. Write a code fragment to set bits 7, 6, 5, 3, and 0 of the register $t2. Store the result in $s0 li $t1, 0b111010111 # Binary: 111010111 (bits 7, 6, 5, 3, and 0 set to 1) or $s0, $t2, $t1 5. Write a code fragment to toggle bits 7, 2, and 0 of the register $t2. Store the result in $s0 li $t1, 0b10000101 xor $s0, $t2, $t1 # XOR to toggle bits
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