ST20CX 查看數據表（PDF） - STMicroelectronics

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ST20CX

Instruction Set Reference Manual

STMicroelectronics 

ccnt1

ccnt1

check count from 1

Code: 24 FD

Description: Check that Breg is in the range 1..Areg inclusive, interpreting Areg and

Breg as unsigned numbers.

Definition:

if (Breg = 0) or (Bregunsigned > Aregunsigned)

IntegerError

Areg′ ← Breg

Breg′ ← Creg

Creg′ ← undefined

Error signals:

IntegerError signalled if Areg is not in range.

Comments:

Secondary instruction.

See also: csub0

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