compiler: require ARMv8.1 #2345
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Signed-off-by: Nuno Cruces <ncruces@users.noreply.github.com>
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See wasilibs/go-re2#136 for an instance of this happening. |
mathetake
reviewed
Nov 19, 2024
mathetake
reviewed
Nov 19, 2024
mathetake
reviewed
Nov 19, 2024
mathetake
reviewed
Nov 19, 2024
internal/platform/cpuid_arm64.go
Outdated
| func loadCpuFeatureFlags() CpuFeatureFlags { | ||
| switch runtime.GOOS { | ||
| case "darwin", "windows": | ||
| // These OSes require ARMv8.1, which includes atomic instructions. |
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i get why darwin requires v8.1 by default (m series is so), but not sure about windows here. any reference or pointer?
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Windows 10 does not in fact require them, is it good enough to document this?
At least this change should not be a regression.
mathetake
approved these changes
Nov 20, 2024
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cc @anuraaga fyi |
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This checks that Large System Extensions (atomic instructions) are supported on
arm64. These are included in many processors, and are part of ARMv8.1, which is required by macOS and Windows 11.This is similar to the check that the
amd64CPUs support SSE4.1 (which is part of x86-64-v2, and available on most processors).Biggest behavioral change is using
platform.CompilerSupported()to decide whether to (not) use the compiler onwazero.NewRuntimeConfig(), but I think this makes sense.