ST20CX 查看數據表（PDF） - STMicroelectronics

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ST20CX

Instruction Set Reference Manual

STMicroelectronics 

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Code: F4

Description: Subtract Areg from Breg, without checking for overflow.

Definition:

Areg′ ← Breg − Areg

Breg′ ← Creg

Creg′ ← undefined

Error signals: none

Comments:

Secondary instruction.

See also: sub

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