LEGv8 pipeline: Can these instructions be reordered to avoid a pipeline stall? ADD X0,X1,X2 ADD X3,X4,X5...

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LEGv8 pipeline: Can these instructions be reordered to avoid a pipeline stall? ADD X0,X1,X2 ADD X3,X4,X5...

LEGv8 pipeline:

Can these instructions be reordered to avoid a pipeline stall?

ADD X0,X1,X2

ADD X3,X4,X5

LDUR X11,[X10,#0]

ADD X13, X11,X14

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Answer 1

Answer #1

As per my understanding, we can move instruction 3 LDUR X11,[X10,#0] to instruction 1 or 2 as instructions 1 and 2 are independent but instruction 3 and instruction 4 are inter-dependent due to involvement of X11.

Hope it helps, feel free to comment in case of any query.

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Answer 2

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LEGv8 pipeline: Can these instructions be reordered to avoid a pipeline stall? ADD X0,X1,X2 ADD X3,X4,X5...

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LEGv8 pipeline: Can these instructions be reordered to avoid a pipeline stall? ADD X0,X1,X2 ADD X3,X4,X5...

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