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CHAPTER 7 DETAILED EXECUTION INSTRUCTIONS
7.78 STH (Store Half-word Data in Register to Memory)
Stores the half-word data in "Ri" to memory address "(R14 + o8 × 2)".
The value "o8" is a signed calculation.
■ STH (Store Half-word Data in Register to Memory)
Assembler format: STH Ri, @(R14, disp9)
Operation: Ri → ( R14 + o8 × 2)
Flag change:
N, Z, V, and C: Unchanged
Execution cycles: a cycle(s)
Instruction format:
Example: STH R3, @(R14, 2)
NZVC
––––
MSB LSB
0101 Rio8
12345678
R3R3
0000 4321
4321
12345678
1234567A 1234567A
1234 5678
0000 4321
R14
1234 5678
R14
Instruction bit pattern : 0101 0000 0001 0011
xxxx
Memory Memory
Before execution After execution