ST20CX View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST20CX

Instruction Set Reference Manual

STMicroelectronics 

bitcnt

bitcnt

count bits set in word

Code: 27 F6

Description: Count the number of bits set in Areg and add this to the value in Breg.

Definition:

Areg′ ← Breg + number of bits set to 1 in Areg

Breg′ ← Creg

Creg′ ← undefined

Error signals: none

Comments:

Secondary instruction.

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