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Update Section 1 of the VFS document to mention that the implicit BTB…#31

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alindsay-ampere merged 4 commits into
AmpereComputing:mainfrom
PierreMichaud-Inria:main
Apr 9, 2026
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Update Section 1 of the VFS document to mention that the implicit BTB…#31
alindsay-ampere merged 4 commits into
AmpereComputing:mainfrom
PierreMichaud-Inria:main

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… records all branches.

Pierre Michaud added 4 commits March 31, 2026 17:21
In the long run, the polarity should not matter. However, traces are short and the PHT
is large, so the initial value of the hysteresis bit (zero) has significant impact
on prediction accuracy. The new VFS is 0.973.
* Add footnote AmpereComputing#3 (sign extension of a signed val/reg is disabled);
* In Section 3.5, reword the description of execute_if (single bit condition instead of mask).
@alindsay-ampere alindsay-ampere merged commit 50f2490 into AmpereComputing:main Apr 9, 2026
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