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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
__attribute__((visibility("hidden"), nocommon))
_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 newlib we can use __aarch64_sme_accessible().
#if defined(__linux__)
#ifndef AT_HWCAP2
#define AT_HWCAP2 26
#endif
#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;
}
#else // defined(__linux__)
#if defined(COMPILER_RT_SHARED_LIB)
__attribute__((weak))
#endif
extern _Bool __aarch64_sme_accessible(void);
static _Bool has_sme(void) {
#if defined(COMPILER_RT_SHARED_LIB)
if (!__aarch64_sme_accessible)
return 0;
#endif
return __aarch64_sme_accessible();
}
#endif // defined(__linux__)
#if __GNUC__ >= 9
#pragma GCC diagnostic ignored "-Wprio-ctor-dtor"
#endif
__attribute__((constructor(90)))
static void init_aarch64_has_sme(void) {
__aarch64_has_sme_and_tpidr2_el0 = has_sme();
}
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