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re-implement some of the FCVTZS/FCVTMS/FCVTPS/FCVTNS #1150

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mr-c opened this issue Mar 20, 2024 · 1 comment

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mr-c commented Mar 20, 2024 •

edited

Recent Qemu confirms the different behavior that was seen on mac M1 and a Pixel 4a 5g phone versus our previous implementation.

To fix this:

Revert 339ffe4
Adjust the test vectors to match the hardware behavior (or that of a recent Qemu version)
Adjust the software implementations of those intrinsics to match the new test vectors

Note that Arm defines Round towards Zero (RZ) mode as

Means that results are rounded to the nearest representable number that is no greater in magnitude than the unrounded result.

The text was updated successfully, but these errors were encountered:

Collaborator Author

mr-c commented Mar 20, 2024

@yyctw Is this something you have time to do?

mr-c added this to the 0.9.0 milestone

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