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tavianator
on Jan 3, 2025
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The Alder Lake SHLX Anomaly
ANDN is fast. The issue looks specific to shift counts. SHL is also slow.
Bulat_Ziganshin
on Jan 4, 2025
[–]
what about 8-bit ANDN? SHL essentially uses CL, so it may be because 8-bit subregister of "constant register" isn't present on the bypass network
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