boringssl/crypto/cpu_aarch64_win.c

/* Copyright (c) 2018, Google Inc.
 * Copyright (c) 2020, Arm Ltd.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */

#include "internal.h"

#if defined(OPENSSL_AARCH64) && defined(OPENSSL_WINDOWS) && \
    !defined(OPENSSL_STATIC_ARMCAP)

#include <windows.h>

#include <openssl/arm_arch.h>

extern uint32_t OPENSSL_armcap_P;
void OPENSSL_cpuid_setup(void) {
  // We do not need to check for the presence of NEON, as Armv8-A always has it
  OPENSSL_armcap_P |= ARMV7_NEON;

  if (IsProcessorFeaturePresent(PF_ARM_V8_CRYPTO_INSTRUCTIONS_AVAILABLE)) {
    // These are all covered by one call in Windows
    OPENSSL_armcap_P |= ARMV8_AES;
    OPENSSL_armcap_P |= ARMV8_PMULL;
    OPENSSL_armcap_P |= ARMV8_SHA1;
    OPENSSL_armcap_P |= ARMV8_SHA256;
  }
  // As of writing, Windows does not have a |PF_*| value for ARMv8.2 SHA-512
  // extensions. When it does, add it here.
}

#endif  // OPENSSL_AARCH64 && OPENSSL_WINDOWS && !OPENSSL_STATIC_ARMCAP