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[AArch64][compiler-rt] Add LSE support for Windows. #116706

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merged 2 commits into from
Nov 20, 2024
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[AArch64][compiler-rt] Add LSE support for Windows. #116706

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3a11a86
[AArch64] Add LSE support for Windows.
DanielKristofKiss Nov 18, 2024
cb584eb
clangformat.
DanielKristofKiss Nov 18, 2024
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2 changes: 2 additions & 0 deletions compiler-rt/lib/builtins/cpu_model/aarch64.c
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Original file line number Diff line number Diff line change
Expand Up @@ -48,6 +48,8 @@ _Bool __aarch64_have_lse_atomics
#elif defined(__linux__) && __has_include(<sys/auxv.h>)
#include "aarch64/hwcap.inc"
#include "aarch64/lse_atomics/getauxval.inc"
#elif defined(_WIN32)
#include "aarch64/lse_atomics/windows.inc"
#else
// When unimplemented, we leave __aarch64_have_lse_atomics initialized to false.
#endif
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12 changes: 12 additions & 0 deletions compiler-rt/lib/builtins/cpu_model/aarch64/lse_atomics/windows.inc
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@@ -0,0 +1,12 @@
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <processthreadsapi.h>

#ifndef PF_ARM_V81_ATOMIC_INSTRUCTIONS_AVAILABLE
#define PF_ARM_V81_ATOMIC_INSTRUCTIONS_AVAILABLE 34
#endif

static void CONSTRUCTOR_ATTRIBUTE init_have_lse_atomics(void) {
if (IsProcessorFeaturePresent(PF_ARM_V81_ATOMIC_INSTRUCTIONS_AVAILABLE))
__aarch64_have_lse_atomics = true;
}
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