Fujitsu CM71-00101-5E User Manual
243
CHAPTER 7 DETAILED EXECUTION INSTRUCTIONS
7.126
EXTUB (Unsign Extend from Byte Data to Word Data)
Extends 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
N
Z
V
C
–
–
–
–
MSB
LSB
1
0
0
1
0
1
1
1
1
0
0
1
Ri
R1
F F F F F F F F
R1
0 0 0 0
0 0 F F
Before execution
After execution
Instruction bit pattern : 1001 0111 1001 0001