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5.29) Explain what the following fragment of code achieves. Note that the data is signed and...

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Electrical Engineering

5.29) Explain what the following fragment of code achieves. Notethat the data is signed and that the packed shift right arithmeticinstruction operates on word (16-bit) operands.

MOVQ MM0, MM1

PSRAW MM0, 15

PXOR MM0, MM1

5.30) Consider the following block of operations that might befound inside a loop. Explainf what the instructions do and whatoperation is being performed on the data.

MOVQ MM1, A ; move 8 pixels of image A

MOVQ MM2, B ; move 8 pixels of image B

MOVQ MM3, MM1

PSUBSB MM1, MM2

PSUBSB MM2, MM3

POR MM1, MM2

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