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BLD (Bit LoaD)
<Operation>
(<Bit No.> of <EAd>) → C
<Assembly-Language Format>
BLD #xx:3, <EAd>
<Examples>
BLD #1, R3H
BLD #2, @R2
BLD #4, @H'FF90:8
<Operand Size>
Byte
<Description>
This instruction loads a specified bit into 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.
Mnem.
Operands
BLD
#xx:3, Rd
BLD
#xx:3,@Rd
BLD
#xx:3,@aa:8
<Condition Code>
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: Loaded with the specified bit.
#xx:3
7
Bit No.
Instruction code
1st byte
2nd byte
7
7
0 IMM
7
C
0 rd
7
E
abs
54
H
N
0
C
3rd byte
4th byte
rd
0
7
7 0 IMM 0
7 0 IMM 0
7
BLD
Z
V
C
No. of
states
2
6
6
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