ST20-C1 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'ST20-C1' PDF : 205 Pages View PDF
ashr
arithmetic shift right
Code: 21 FF
Description: Perform an arithmetic shift right of Breg by Areg bits, copying the sign
bit into the vacated bits. Breg, not Areg, is rotated into Creg, to preserve the value
rather than the shift length.
Definition:
Areg′ ← (Breg >>arith Aregunsigned)
Breg′ ← Creg
Creg′ ← Breg
Status Register:
No effect
Comments:
Secondary instruction.
If Areg is not in the range 0..31 then the result is undefined.
See also: shl shr
section 4.9.
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