Extub (Unsign Extend From Byte Data To Word Data) - Fujitsu FR Family Instruction Manual

CHAPTER 7 DETAILED EXECUTION INSTRUCTIONS

7.126 EXTUB (Unsign Extend from Byte Data to Word Data)

Extend the byte data indicated by "Ri" to word data as an unsigned binary value.
■ EXTUB (Unsign Extend from Byte Data to Word Data)
Assembler format: EXTUB Ri
Operation: extu (Ri) → Ri (byte → word)
Flag change:
N, Z, V, and C: Unchanged
Execution cycles: 1 cycle
Instruction format:
Example: EXTUB R1
240
N Z V C
– – – –
MSB
1 0 0 1
R1
F F F F F F F F
Before execution
0 1 1 1 1 0
LSB
0 1 Ri
R1
0 0 0 0 0 0 F F
After execution