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Detect Neon capability at runtime #63

Merged
merged 1 commit into from
Oct 25, 2022
Merged

Detect Neon capability at runtime #63

merged 1 commit into from
Oct 25, 2022

Commits on Oct 4, 2022

  1. Detect Neon capability at runtime via operating system APIs 

    On ARM, detecting processor capabilities is a privileged operation.
So unlike x86's cpuid() intrinsics, we must query support via OS-specific
API functions. Implemented for various operating systems:

* Linux: via getauxval()
* FreeBSD: via the similar elf_aux_info()
* macOS: all Apple Silicon machines support Neon (so far)
* Windows: via IsProcessorFeaturePresent()
    @jmarshall
    jmarshall committed Oct 4, 2022
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