volk icon indicating copy to clipboard operation
volk copied to clipboard

Published 20 hours ago • verified publisher icon gnuradio

Windows: ARM64/NEON Support

Open JVital2013 opened this issue 1 year ago • 1 comments
trafficstars

Fixes NEON support on Windows ARM64. Most of the changes deal with the somewhat odd way in which Microsoft deals with the uint8x16_t, etc types.

Additionally, MSVC on ARM/ARM64 does not support any inline assembly. Therefore __VOLK_ASM does not work, so a few workarounds have been implemented. One of these workarounds is to assume NEON is present if you're using MSVC, and building for ARM64 instead of running a check. NEON is a requirement for Windows on ARM as shown here: https://learn.microsoft.com/en-us/cpp/build/arm64-windows-abi-conventions?view=msvc-170.

Note that NEONv7 on Windows is not supported in this PR, as it would require re-wiring all the kernels into MASM (or some other format) to build on MSVC. Windows on 32-bit ARM is being deprecated anyway, so I'm thinking the neonv7 kernels can be ignored on Windows.

JVital2013 avatar Sep 04 '24 18:09 JVital2013

@JVital2013 are you still working on this PR?

jdemel avatar Jan 22 '25 20:01 jdemel