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Architectural Overview UM018809-0611

ZNEO

CPU Core

User Manual

called the condition code (cc), which are assembled into each conditional jump opcode.

Table 3 summarizes condition codes and their assembly language mnemonics.

Some binary condition codes are expressed by more than one mnemonic.

The result of the flag test operation determines if the conditional jump executes.

Table 3. Condition Codes

Binary Hex

Assembly

Mnemonic Definition

Flag Test Operation

(Jump if True)

0000 0 B Blank B = 1

0001 1 LT Less Than (S XOR V) = 1

0010 2 LE Less Than or Equal (Z OR (S XOR V)) = 1

0011 3 ULE Unsigned Less Than or Equal (C OR Z) = 1

0100 4 OV Overflow V = 1

0101 5 MI Minus S = 1

0110 6 ZZero Z = 1

0110 6 EQ Equal Z = 1

0111 7 CCarry C = 1

0111 7 ULT Unsigned Less Than C = 1

1000 8 NB Not Blank B = 0

1001 9 GE Greater Than or Equal (S XOR V) = 0

1010 A GT Greater Than (Z OR (S XOR V)) = 0

1011 B UGT Unsigned Greater Than (C OR Z) = 0

1100 C NOV No Overflow V = 0

1101 D PL Plus S = 0

1110 E NZ Non-Zero Z = 0

1110 E NE Not Equal Z = 0

1111 F NC No Carry C = 0

1111 F UGE Unsigned Greater Than or

Equal

C = 0

Note:

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