C++ (Cpp) CRYPTO_is_NEON_capable Examples

Example #1

File: android_security_cts_EncryptionTest.cpp Project: JasonHJ/android-6.0.0_r1

/*
 * Function: neonIsEnabled
 * Purpose: Check if libcrypto is compiled with NEON support
 * Parameters: none
 * Returns: boolean: (true) if NEON is available, (false) otherwise
 * Exceptions: none
 */
static jboolean android_security_cts_EncryptionTest_neonIsEnabled(JNIEnv *, jobject)
{
#if defined(OPENSSL_ARM) || defined(OPENSSL_AARCH64)
    jboolean rc = CRYPTO_is_NEON_capable();
#else
    jboolean rc = false;
#endif

    ALOGE("EncryptionTest::neonIsEnabled: %d", rc);
    return rc;
}

Example #2

File: cpu-arm.c Project: Vesnica/boringssl

void OPENSSL_cpuid_setup(void) {
  if (getauxval == NULL) {
    // On ARM, but not AArch64, try a NEON instruction and see whether it works
    // in order to probe for NEON support.
    //
    // Note that |CRYPTO_is_NEON_capable| can be true even if
    // |CRYPTO_set_NEON_capable| has never been called if the code was compiled
    // with NEON support enabled (e.g. -mfpu=neon).
    if (!g_set_neon_called && !CRYPTO_is_NEON_capable() && probe_for_NEON()) {
      OPENSSL_armcap_P |= ARMV7_NEON;
    }
    return;
  }

  static const unsigned long AT_HWCAP = 16;
  unsigned long hwcap = getauxval(AT_HWCAP);

#if defined(OPENSSL_ARM)
  static const unsigned long kNEON = 1 << 12;
  if ((hwcap & kNEON) == 0) {
    return;
  }

  /* In 32-bit mode, the ARMv8 feature bits are in a different aux vector
   * value. */
  static const unsigned long AT_HWCAP2 = 26;
  hwcap = getauxval(AT_HWCAP2);

  /* See /usr/include/asm/hwcap.h on an ARM installation for the source of
   * these values. */
  static const unsigned long kAES = 1 << 0;
  static const unsigned long kPMULL = 1 << 1;
  static const unsigned long kSHA1 = 1 << 2;
  static const unsigned long kSHA256 = 1 << 3;
#elif defined(OPENSSL_AARCH64)
  /* See /usr/include/asm/hwcap.h on an aarch64 installation for the source of
   * these values. */
  static const unsigned long kNEON = 1 << 1;
  static const unsigned long kAES = 1 << 3;
  static const unsigned long kPMULL = 1 << 4;
  static const unsigned long kSHA1 = 1 << 5;
  static const unsigned long kSHA256 = 1 << 6;

  if ((hwcap & kNEON) == 0) {
    return;
  }
#endif

  OPENSSL_armcap_P |= ARMV7_NEON;

  if (hwcap & kAES) {
    OPENSSL_armcap_P |= ARMV8_AES;
  }
  if (hwcap & kPMULL) {
    OPENSSL_armcap_P |= ARMV8_PMULL;
  }
  if (hwcap & kSHA1) {
    OPENSSL_armcap_P |= ARMV8_SHA1;
  }
  if (hwcap & kSHA256) {
    OPENSSL_armcap_P |= ARMV8_SHA256;
  }
}

Example #3

File: e_aes.c Project: xin3liang/platform_external_chromium_org_third_party_boringssl_src

static char bsaes_capable() {
  return CRYPTO_is_NEON_capable();
}