APPENDIX B INSTRUCTION SET LIST
User’s Manual U14359EJ4V0UM
553
(5) Register symbols used in flag operations
Identifier
Explanation
(Blank)
No change
0
Clear to 0
×
Set or cleared in accordance with the results.
R
Previously saved values are restored.
(6) Condition codes
Condition Name
(cond)
Condition Code
(cccc)
Condition Formula
Explanation
V
0 0 0 0
OV = 1
Overflow
NV
1 0 0 0
OV = 0
No overflow
C/L
0 0 0 1
CY = 1
Carry
Lower (Less than)
NC/NL
1 0 0 1
CY = 0
No carry
Not lower (Greater than or equal)
Z/E
0 0 1 0
Z = 1
Zero
Equal
NZ/NE
1 0 1 0
Z = 0
Not zero
Not equal
NH
0 0 1 1
(CY or Z) = 1
Not higher (Less than or equal)
H
1 0 1 1
(CY or Z) = 0
Higher (Greater than)
N
0 1 0 0
S = 1
Negative
P
1 1 0 0
S = 0
Positive
T
0 1 0 1
−
Always (Unconditional)
SA
1 1 0 1
SAT = 1
Saturated
LT
0 1 1 0
(S xor OV) = 1
Less than signed
GE
1 1 1 0
(S xor OV) = 0
Greater than or equal signed
LE
0 1 1 1
((S xor OV) or Z) = 1
Less than or equal signed
GT
1 1 1 1
((S xor OV) or Z) = 0
Greater than signed