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BIAND (Bit Invert AND)
<Operation>
C ∧[ ¬ (<Bit No.> of <EAd>)] → C
<Assembly-Language Format>
BIAND #xx:3, <EAd>
<Examples>
BIAND #0, R1H
BIAND #2, @R5
BIAND #4, @H'FFDE:8
<Operand Size>
Byte
<Description>
This instruction ANDs the inverse of a specified bit with the carry flag and places the result in
the carry flag. The specified bit can be located in a general register or memory. The bit
number is specified by 3-bit immediate data. The operation is shown schematically below.
→
<EAd>*
Byte data in register or memory
The value of the specified bit is not changed.
<Instruction Formats>
Addressing
mode
Register direct
Register indirect
Absolute address
*Register direct, register indirect, or absolute addressing.
Bit No.
Mnem.
Operands
BIAND #xx:3, Rd
BIAND #xx:3,@Rd
BIAND #xx:3,@aa:8
<Condition Code>
I
I
— — — — — — —
— — — — — — —
I: Previous value remains unchanged.
H: Previous value remains unchanged.
N: Previous value remains unchanged.
Z: Previous value remains unchanged.
V: Previous value remains unchanged.
C: ANDed with the inverse of the specified
bit.
#xx:3
7
Invert
∧
C
Instruction code
1st byte
2nd byte
1 IMM rd
7
6
0 rd
0
7
C
7
E
abs
49
BIAND
H
N
Z
H
N
Z
0
C
3rd byte
4th byte
6 1 IMM 0
7
7
6 1 IMM 0
V
C
V
C
No. of
states
2
6
6
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