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The instruction, PSUBB, performs subtraction in

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in Microprocessor by (39.4k points)
The instruction, PSUBB, performs subtraction in

(a) packed word

(b) packed byte

(c) packed double word

(d) unpacked word

This question was addressed to me in an international level competition.

My enquiry is from MMX Instruction Set topic in division Recent Advancements in Microprocessor Architecture of Microprocessor

1 Answer

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by (49.2k points)
Correct option is (b) packed byte

Explanation: The instruction, PSUBB, performs subtraction in a packed byte.

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