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Arm64: Add SVE feature detection for Windows #100937

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merged 2 commits into from
Apr 12, 2024
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Arm64: Add SVE feature detection for Windows #100937

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8e035a9
Add SVE feature detection for Windows
kunalspathak Apr 11, 2024
dd5645b
Move the PF_ARM_SVE_INSTRUCTIONS_AVAILABLE under HOST_WINDOWS
kunalspathak Apr 11, 2024
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9 changes: 9 additions & 0 deletions src/native/minipal/cpufeatures.c
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Original file line number Diff line number Diff line change
Expand Up @@ -65,6 +65,10 @@ static uint32_t xmmYmmStateSupport()
#define XSTATE_MASK_AVX512 (0xE0) /* 0b1110_0000 */
#endif // XSTATE_MASK_AVX512

#ifndef PF_ARM_SVE_INSTRUCTIONS_AVAILABLE
#define PF_ARM_SVE_INSTRUCTIONS_AVAILABLE (46)
#endif

static uint32_t avx512StateSupport()
{
#if defined(HOST_APPLE)
Expand Down Expand Up @@ -458,6 +462,11 @@ int minipal_getcpufeatures(void)

// TODO: IsProcessorFeaturePresent doesn't support LRCPC2 yet.

if (IsProcessorFeaturePresent(PF_ARM_SVE_INSTRUCTIONS_AVAILABLE))
{
result |= ARM64IntrinsicConstants_Sve;
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Does this give us parity between Linux/Windows at this point or are there others that are still missing on Windows that Linux currently handles?

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ARM64IntrinsicConstants_Rcpc2 and ARM64IntrinsicConstants_Rdm are still missing and I didn't see their equivalent yet on windows side.

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LRCPC2 is supported since Windows 11 22H2.

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LRCPC2 is supported since Windows 11 22H2.

I don't see an entry of LRCPC2 in that. It just has LRCPC that is mapped to 45.

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Yes, it's not LRCPC2. Not a big deal though, it's just a minor optimization on top of RCPC1

}

#endif // HOST_WINDOWS

#endif // HOST_ARM64
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