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After a sequence of MMX instructions is executed, the MMX registers should be cleared by an instruction,

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After a sequence of MMX instructions is executed, the MMX registers should be cleared by an instruction,

(a) CLEAR

(b) RESET

(c) EMM

(d) EMMS

This question was posed to me during an interview for a job.

This interesting question is from Enhanced Instruction Set of Pentium, Intel MMX Architecture in portion Recent Advancements in Microprocessor Architecture of Microprocessor

1 Answer

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by (49.2k points)
Right choice is (d) EMMS

Best explanation: After a sequence of MMX instructions is executed, the MMX registers should be cleared by an instruction, EMMS, which implies Empty the MMX Stack.

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