1. Logical Instructions And rd rs rt Nor rd rs rt Or rd rs rt
Xor rd rs rt
Andi rt rs Imm
Ori rt rs Imm
Xori rt rs Imm
Careful: Immediate variants Zero-extend

2. Logic Truth Tables
AND A B C 1
NOR A B C 1 OR A B C 1
XOR A B C 1

3. How to Invert Each Bit? (One's complement) Nor rd rs $0 This is not!
Nor fuction
A B C
0 0 1
0 1 0
1 0 0
1 1 0 A 1
C=A'
B=0

4. Shift Instructions Logical shift left Logical shift right A B C D
lost
lost
B C D 0
0 A B C

5. Shift Instructions
Arithmetic shift right
A B C D
lost
A A B C

6. Shift Instructions Sll rd rt expr Sra rd rt expr Srl rd rt expr
rd := rt shifted by expr (0..31)
Sllv rd rt rs
Srav rd rt rs
Srlv rd rt rs
rd := rt shifted by rs (variable)

7. Rotate Instructions Rotate left Rotate right A B C D A B C D B C D A