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ST20C2 Datasheet(PDF) 119 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) 119 Page - STMicroelectronics

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lmul
119/212
®
lmul
long multiply
Code: 23 F1
Description: Form the double length product of Areg and Breg, with Creg as carry
in, treating the initial values as unsigned.
Definition:
Areg
′
unsigned
← prod rem 2BitsPerWord
Breg
′
unsigned
← prod / 2BitsPerWord
Creg
′← undefined
where prod
= (Breg
unsigned × Aregunsigned) + Cregunsigned
–
the value of prod is calculated to unlimited precision
Error signals: none
Comments:
Secondary instruction.
See also:
ldiv



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