ST20C2 데이터 시트보기 (PDF) - STMicroelectronics

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ST20C2

Instruction Set Reference Manual

STMicroelectronics 

xdble

xdble

extend to double

Code: 21 FD

Description: Sign extend the integer in Areg into a double length signed integer.

Definition:

if (Areg ≥ 0)

Breg′ ← 0

else

Breg′ ← −1

Creg′

← Breg

Error signals: none

Comments:

Secondary instruction.

202/212

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