Fujitsu CM71-00101-5E User Manual
161
CHAPTER 7 DETAILED EXECUTION INSTRUCTIONS
7.65
LDUH (Load Half-word Data in Memory to Register)
Extends with zeros the half-word data at memory address "(R14 + o8 × 2)", loads to
"Ri".
The value "o8" is a signed calculation.
"Ri".
The value "o8" is a signed calculation.
■
LDUH (Load Half-word Data in Memory to Register)
Assembler format:
LDUH @(R14, disp9), Ri
Operation:
extu (( R14 + o8 × 2))
→
Ri
Flag change:
N, Z, V, and C: Unchanged
Execution cycles:
b cycle(s)
Instruction format:
Example:
LDUH @(R14, 2), R3
N
Z
V
C
–
–
–
–
MSB
LSB
0
1
0
0
Ri
o8
12345678
R3
R3
4 3 2 1
0 0 0 0
4 3 2 1
12345678
1234567A
1234567A
4 3 2 1
1 2 3 4
5 6 7 8
R14
1 2 3 4
5 6 7 8
R14
Instruction bit pattern :
0100 0000 0001 0011
Memory
Memory
Before execution
After execution
x x x x
x x x x