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ST20-C1 Datasheet(PDF) 94 Page - STMicroelectronics

Part # ST20-C1
Description  Instruction Set Reference Manual
PDF  205 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST20-C1 Datasheet(HTML) 94 Page - STMicroelectronics

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®
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:
Secondar y 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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