Btstl (Test Lower 4 Bits Of Byte Data In Memory) - Fujitsu FR Family Instruction Manual

CHAPTER 7 DETAILED EXECUTION INSTRUCTIONS
7.32

BTSTL (Test Lower 4 Bits of Byte Data in Memory)

Takes the logical AND of the 4-bit immediate data and the lower 4 bits of byte data at
memory address "Ri", places the results in the condition code register (CCR).
■ BTSTL (Test Lower 4 Bits of Byte Data in Memory)
Assembler format: BTSTL #u4, @Ri
Operation: u4 and (Ri) [Test uses lower 4 bits only]
Flag change:
N:
Z:
V and C: Unchanged
Execution cycles: 2+a cycles
Instruction format:
Example: BTSTL #1, @R3
118
N Z V C
0 C – –
Cleared
Set when the operation result is "0", cleared otherwise.
MSB
1 0 0 0
Instruction bit pattern :
1000 1000 0001 0011
R3
1 2 3 4 5 6 7 8
Memory
12345678
1 0
12345679
N Z V C
CCR
0 0 0 0
Before execution
1 0 0 0 u4
LSB
Ri
R3 1 2 3 4 5 6 7 8
Memory
12345678
1 0
12345679
N Z V C
CCR
0 1 0 0
After execution