Fujitsu CM71-00101-5E User Manual

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CHAPTER 7  DETAILED EXECUTION INSTRUCTIONS
7.125
EXTSB (Sign Extend from Byte Data to Word Data)
Extends the byte data indicated by "Ri" to word data as a signed binary value.
EXTSB (Sign Extend from Byte Data to Word Data)
Assembler format:
EXTSB Ri
Operation:
exts (Ri) 
 Ri  (byte 
 word)
Flag change:    
N, Z, V, and C: Unchanged
Execution cycles:  
1 cycle
Instruction format:  
Example:
EXTSB R1
N
Z
V
C
MSB
LSB
1
0
0
1
0
1
1
1
1
0
0
0
Ri
 
R1
 
 
 
0 0 0 0
0 0 A B
R1
F F F F F F A B
Before execution
After execution
Instruction bit pattern : 1001 0111 1000 0001