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ST20C2 Datasheet(PDF) 163 Page - STMicroelectronics

Part # ST20C2
Description  Instruction Set Reference Manual
PDF  212 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST20C2 Datasheet(HTML) 163 Page - STMicroelectronics

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slmul
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®
slmul
signed long multiply
Code: 26 F4
Description: Perform signed long multiplication. This instruction forms the double
length product of Areg and Breg, with Creg as carry in, treating the initial values Areg
and Breg as signed.
Definition:
Areg
′
unsigned ←
prod rem 2BitsPerWord
Breg
′← prod / 2BitsPerWord
Creg
′← undefined
where prod
= (Breg × Areg) + Creg
unsigned
–
the value of prod is calculated to unlimited precision
Error signals:
none
Comments:
Secondary instruction.
See also:
lmul sulmul



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