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Which out of the following is a correct emulated instruction?

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in Microcontroller by (14.6k points)
Which out of the following is a correct emulated instruction?

(a) ADC(.B) dst

(b) ADD(.B) src,dst

(c) ADDC(.B) src,dst

(d) AND(.B) src,dst

This question was posed to me by my school teacher while I was bunking the class.

The origin of the question is Architecture topic in division MSP430 Microcontroller of Microcontroller

1 Answer

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by (24.2k points)
Right choice is (a) ADC(.B) dst

Easy explanation: “ADC(.B) dst” this is emulated to “ADDC.B #0,dst” hence this is an emulated instruction. The emulated instructions use core instructions combined with the architecture and implementation of the CPU for higher code efficiency and faster execution.

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