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SHAR (SHift Arithmetic Right)
<Operation>
Rd (shifted arithmetic right ) → Rd
<Assembly-Language Format>
SHAR Rd
<Examples>
SHAR R5H
<Operand Size>
Byte
<Description>
This instruction shifts an 8-bit general register one bit to the right. The most significant bit
remains unchanged. The sign of the result does not change. The least significant bit shifts into
the carry flag.
The operation is shown schematically below.
MSB
Bit 7
<Instruction Formats>
Addressing
mode
Register direct
LSB
Bit 0
Mnem.
Operands
SHAR
Rd
<Condition Code>
I
— — — —
I: Previous value remains unchanged.
H: Previous value remains unchanged.
N: Set to "1" if the result is negative;
otherwise cleared to "0."
Z: Set to "1" if the result is zero; otherwise
cleared to "0."
V: Cleared to "0."
C: Receives the previous value in bit 0.
C
Instruction code
1st byte
2nd byte
1
1
8
rd
105
H
N
Z
3rd byte
4th byte
SHAR
V
C
0
No. of
states
2
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