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A comment on AMD ymm registers are rolling back. Parent comment

Re:AMD ymm registers are rolling back by to11mtm on Wednesday March 01, 2023 @12:59PM (#34985799)
There is a Micro-op cache in play in many cases like Zen [0], but I'm not entirely sure what it does.

[0] - https://chipsandcheese.com/2022/11/05/amds-zen-4-part-1-fron...

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Re:AMD ymm registers are rolling back by AstralStorm on Thursday March 02, 2023 @05:34AM (#34994186)
Micro-op cache is literally L1 cache after the instructions are broken into micro-ops.

It's not a magic arc profiling optimization either.

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