Fujitsu F2MC-8FX Manual Do Utilizador

CHAPTER 6 DETAILED RULES FOR EXECUTION INSTRUCTIONS

6.7

BBC (Branch if Bit is Clear)

Branch when the value of bit b in dir memory is 0. Branch address corresponds to the
value of addition between the PC value (word value) of the next instruction and the
value with rel code-extended (word value).

■

BBC (Branch if Bit is Clear)

Operation

(bit)b = 0: (PC)

← (PC) + 3 + rel (Word addition)

(bit)b = 1: (PC)

← (PC) + 3 (Word addition)

Assembler format

BBC dir:b, rel

Condition code (CCR)

+: Changed by executing instruction

-: Not changed

N: Not changed

Z: Set to 1 when the value of dir:b is 0 and set to 0 when it is 1.

V: Not changed

C: Not changed

Number of execution cycles: 5

Byte count: 3

OP code: B0 to B7