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[compiler-rt][AArch64][Android] Use getauxval on Android. #102979

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Merged
merged 3 commits into from
Aug 30, 2024
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[compiler-rt][AArch64][Android] Use getauxval on Android. #102979

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3d36920
[compiler-rt][AArch64][Android] Use getauxval on Android.
DanielKristofKiss Aug 12, 2024
4f12df1
drop __getauxval support, compiler-rt anyway usues getauxval everywhere.
DanielKristofKiss Aug 13, 2024
ef5bdd0
fix typo
DanielKristofKiss Aug 13, 2024
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22 changes: 10 additions & 12 deletions compiler-rt/lib/builtins/aarch64/sme-abi-init.c
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Original file line number Diff line number Diff line change
Expand Up @@ -7,24 +7,22 @@ _Bool __aarch64_has_sme_and_tpidr2_el0;

// We have multiple ways to check that the function has SME, depending on our
// target.
// * For Linux we can use __getauxval().
// * For Linux/Glibc we can use getauxval().
// * For Android we can use getauxval().
// * For newlib we can use __aarch64_sme_accessible().

#if defined(__linux__)

#ifndef AT_HWCAP2
#define AT_HWCAP2 26
#if defined(__ANDROID__)
#include <sys/auxv.h>
#elif __has_include(<sys/auxv.h>)
#include <sys/auxv.h>
#else
#define getauxval(x) 0
#endif
#include "../cpu_model/aarch64/hwcap.inc"

#ifndef HWCAP2_SME
#define HWCAP2_SME (1 << 23)
#endif

extern unsigned long int __getauxval (unsigned long int);

static _Bool has_sme(void) {
return __getauxval(AT_HWCAP2) & HWCAP2_SME;
}
static _Bool has_sme(void) { return getauxval(AT_HWCAP2) & HWCAP2_SME; }

#else // defined(__linux__)

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