tree c608aca761dddc540b405de469e097720c3e3bcb
parent 393eff4e02e7ab3d234d246a8d6912c8e745e6f9
author Amy Huang <akhuang@google.com> 1720468742 -0700
committer GitHub <noreply@github.com> 1720468742 -0700
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Add __hlt intrinsic for Windows ARM. (#96578)

Add __hlt, which is a MSVC ARM64 intrinsic. 

This intrinsic is just the HLT instruction. MSVC's version seems to
return something undefined; in this patch
it will just return zero. 

MSVC intrinsics are defined here
https://learn.microsoft.com/en-us/cpp/intrinsics/arm64-intrinsics.
I used unsigned int as the return type, because that is what the MSVC
intrin.h header uses, even though
it conflicts with the documentation.