hw_accel.c

Go to the documentation of this file.

/* SPDX-License-Identifier: LGPL-2.1-only */
#include <hw_accel.h>
#include <errno.h>
 
#if defined(__aarch64__) || defined(__arm__)
#if defined(__TIZEN__) || defined(__ANDROID__) || defined(__linux__)
#include <asm/hwcap.h>
#endif /* __TIZEN__ || __ANDROID__ || __linux__ */
#endif /* __arch64__ || __arm__ */
 
#if !defined(__APPLE__)
#include <sys/auxv.h>
#else
#define HWCAP_ASIMD 0x1
#if defined(__aarch64__)
#define getauxval(x) (HWCAP_ASIMD)
#else
#define getauxval(x) (0x0)
#endif /* __aarch64__ */
#endif /* __APPLE__ */
 
gint
cpu_neon_accel_available (void)
{
  gint neon_available = 0;
 
#if defined(__aarch64__) || defined(__arm__)
  gulong hwcap_flag;
 
#if defined(__aarch64__)
  hwcap_flag = HWCAP_ASIMD;
#elif defined(__arm__)
  hwcap_flag = HWCAP_NEON;
#endif /* __arch64 __ */
 
  if (getauxval (AT_HWCAP) & hwcap_flag) {
    neon_available = 0;
  } else {
    neon_available = -EINVAL;
  }
#endif /* __arch64__ || __arm__ */
 
  return neon_available;
}