xref: /aosp_15_r20/external/vixl/examples/aarch64/cpu-features.cc (revision f5c631da2f1efdd72b5fd1e20510e4042af13d77)

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#include "examples.h"

using namespace vixl;
using namespace vixl::aarch64;

// Demonstrate the use of VIXL's CPU feature detection, printing the features
// that VIXL detects.

#ifndef TEST_EXAMPLES
int main() {
  // Simple native deployments should initialise CPU features using
  // `InferFromOS()`. If not on an AArch64 host, this returns nothing.
  std::cout << "==== CPUFeatures::InferFromOS() ====\n";
  std::cout << CPUFeatures::InferFromOS() << "\n";

  // VIXL assumes support for FP, NEON and CRC32 by default. These features were
  // implemented before the CPUFeatures mechanism.
  std::cout << "==== CPUFeatures::AArch64LegacyBaseline() ====\n";
  std::cout << CPUFeatures::AArch64LegacyBaseline() << "\n";

  // Retrieve a list of all supported CPU features.
  std::cout << "==== CPUFeatures::All() ====\n";
  std::cout << CPUFeatures::All() << "\n";

  return 0;
}
#endif