
S3C94A5/F94A5 
SAM88RCRI INSTRUCTION SET 
6-9 
CONDITION CODES 
The opcode of a conditional jump always contains a 4-bit field called the condition code (cc). This specifies under 
which conditions it is to execute the jump. For example, a conditional jump with the condition code for "equal" after a 
compare operation only jumps if the two operands are equal. Condition codes are listed in Table 6-6. 
The carry (C), zero (Z), sign (S), and overflow (V) flags are used to control the operation of conditional jump 
instructions. 
Table 6-6. Condition Codes 
Binary 
Mnemonic 
Description 
Flags Set 
0000 
F 
Always false 
– 
1000 
T 
Always true 
– 
0111 
(1)
C 
Carry 
C = 1 
1111 
(1)
NC 
No carry 
C = 0 
0110 
(1)
Z 
Zero 
Z = 1 
1110 
(1)
NZ 
Not zero 
Z = 0 
1101 
PL 
Plus 
S = 0 
0101 
MI 
Minus 
S = 1 
0100 
OV 
Overflow 
V = 1 
1100 
NOV 
No overflow 
V = 0 
0110 
(1)
EQ 
Equal 
Z = 1 
1110 
(1)
NE 
Not equal 
Z = 0 
1001 
GE 
Greater than or equal 
(S  XOR  V) = 0 
0001 
LT 
Less than 
(S  XOR  V) = 1 
1010 
GT 
Greater than 
(Z  OR (S  XOR  V)) = 0 
0010 
LE 
Less than or equal 
(Z  OR (S  XOR  V)) = 1 
1111 
(1)
UGE 
Unsigned greater than or equal 
C = 0 
0111 
(1)
ULT 
Unsigned less than 
C = 1 
1011 
UGT 
Unsigned greater than 
(C = 0  AND  Z = 0) = 1 
0011 
ULE 
Unsigned less than or equal 
(C  OR  Z) = 1 
NOTES:
1. Indicate condition codes that are related to two different mnemonics but which test the same flag.  
For example, Z and EQ are both true if the zero flag (Z) is set, but after an ADD instruction, Z would probably be used;  
after a CP instruction, however, EQ would probably be used. 
2. For operations involving unsigned numbers, the special condition codes UGE, ULT, UGT, and ULE must be used.