text: /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   * All rights reserved.
   *
   * This package is an SSL implementation written
   * by Eric Young (eay@cryptsoft.com).
   * The implementation was written so as to conform with Netscapes SSL.
   *
   * This library is free for commercial and non-commercial use as long as
   * the following conditions are aheared to.  The following conditions
   * apply to all code found in this distribution, be it the RC4, RSA,
   * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
   * included with this distribution is covered by the same copyright terms
   * except that the holder is Tim Hudson (tjh@cryptsoft.com).
   *
   * Copyright remains Eric Young's, and as such any Copyright notices in
   * the code are not to be removed.
   * If this package is used in a product, Eric Young should be given attribution
   * as the author of the parts of the library used.
   * This can be in the form of a textual message at program startup or
   * in documentation (online or textual) provided with the package.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. All advertising materials mentioning features or use of this software
   *    must display the following acknowledgement:
   *    "This product includes cryptographic software written by
   *     Eric Young (eay@cryptsoft.com)"
   *    The word 'cryptographic' can be left out if the rouines from the library
   *    being used are not cryptographic related :-).
   * 4. If you include any Windows specific code (or a derivative thereof) from
   *    the apps directory (application code) you must include an acknowledgement:
   *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
   *
   * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   *
   * The licence and distribution terms for any publically available version or
   * derivative of this code cannot be changed.  i.e. this code cannot simply be
   * copied and put under another distribution licence
   * [including the GNU Public Licence.]
   *
   * This product includes cryptographic software written by Eric Young
   * (eay@cryptsoft.com).  This product includes software written by Tim
   * Hudson (tjh@cryptsoft.com). */
  
  #ifndef OPENSSL_HEADER_CPU_H
  #define OPENSSL_HEADER_CPU_H
  
  #include "CBoringSSL_base.h"
  
  #if defined(__cplusplus)
  extern "C" {
  #endif
  
  
  // Runtime CPU feature support
  
  
  #if defined(OPENSSL_X86) || defined(OPENSSL_X86_64)
  // OPENSSL_ia32cap_P contains the Intel CPUID bits when running on an x86 or
  // x86-64 system.
  //
  //   Index 0:
  //     EDX for CPUID where EAX = 1
  //     Bit 20 is always zero
  //     Bit 28 is adjusted to reflect whether the data cache is shared between
  //       multiple logical cores
  //     Bit 30 is used to indicate an Intel CPU
  //   Index 1:
  //     ECX for CPUID where EAX = 1
  //     Bit 11 is used to indicate AMD XOP support, not SDBG
  //   Index 2:
  //     EBX for CPUID where EAX = 7
  //   Index 3:
  //     ECX for CPUID where EAX = 7
  //
  // Note: the CPUID bits are pre-adjusted for the OSXSAVE bit and the YMM and XMM
  // bits in XCR0, so it is not necessary to check those.
  extern uint32_t OPENSSL_ia32cap_P[4];
  
  #if defined(BORINGSSL_FIPS) && !defined(BORINGSSL_SHARED_LIBRARY)
  const uint32_t *OPENSSL_ia32cap_get(void);
  #else
  OPENSSL_INLINE const uint32_t *OPENSSL_ia32cap_get(void) {
    return OPENSSL_ia32cap_P;
  }
  #endif
  
  #endif
  
  #if defined(OPENSSL_ARM) || defined(OPENSSL_AARCH64)
  
  #if defined(OPENSSL_APPLE)
  // iOS builds use the static ARM configuration.
  #define OPENSSL_STATIC_ARMCAP
  #endif
  
  #if !defined(OPENSSL_STATIC_ARMCAP)
  // CRYPTO_is_NEON_capable_at_runtime returns true if the current CPU has a NEON
  // unit. Note that |OPENSSL_armcap_P| also exists and contains the same
  // information in a form that's easier for assembly to use.
  OPENSSL_EXPORT int CRYPTO_is_NEON_capable_at_runtime(void);
  
  // CRYPTO_is_ARMv8_AES_capable_at_runtime returns true if the current CPU
  // supports the ARMv8 AES instruction.
  int CRYPTO_is_ARMv8_AES_capable_at_runtime(void);
  
  // CRYPTO_is_ARMv8_PMULL_capable_at_runtime returns true if the current CPU
  // supports the ARMv8 PMULL instruction.
  int CRYPTO_is_ARMv8_PMULL_capable_at_runtime(void);
  
  #if defined(OPENSSL_ARM)
  // CRYPTO_has_broken_NEON returns one if the current CPU is known to have a
  // broken NEON unit. See https://crbug.com/341598.
  OPENSSL_EXPORT int CRYPTO_has_broken_NEON(void);
  
  // CRYPTO_needs_hwcap2_workaround returns one if the ARMv8 AArch32 AT_HWCAP2
  // workaround was needed. See https://crbug.com/boringssl/46.
  OPENSSL_EXPORT int CRYPTO_needs_hwcap2_workaround(void);
  #endif
  #endif  // !OPENSSL_STATIC_ARMCAP
  
  // CRYPTO_is_NEON_capable returns true if the current CPU has a NEON unit. If
  // this is known statically, it is a constant inline function.
  OPENSSL_INLINE int CRYPTO_is_NEON_capable(void) {
  #if defined(__ARM_NEON__) || defined(__ARM_NEON) || \
      defined(OPENSSL_STATIC_ARMCAP_NEON)
    return 1;
  #elif defined(OPENSSL_STATIC_ARMCAP)
    return 0;
  #else
    return CRYPTO_is_NEON_capable_at_runtime();
  #endif
  }
  
  OPENSSL_INLINE int CRYPTO_is_ARMv8_AES_capable(void) {
  #if defined(OPENSSL_STATIC_ARMCAP_AES) || defined(__ARM_FEATURE_CRYPTO)
    return 1;
  #elif defined(OPENSSL_STATIC_ARMCAP)
    return 0;
  #else
    return CRYPTO_is_ARMv8_AES_capable_at_runtime();
  #endif
  }
  
  OPENSSL_INLINE int CRYPTO_is_ARMv8_PMULL_capable(void) {
  #if defined(OPENSSL_STATIC_ARMCAP_PMULL) || defined(__ARM_FEATURE_CRYPTO)
    return 1;
  #elif defined(OPENSSL_STATIC_ARMCAP)
    return 0;
  #else
    return CRYPTO_is_ARMv8_PMULL_capable_at_runtime();
  #endif
  }
  
  #endif  // OPENSSL_ARM || OPENSSL_AARCH64
  
  #if defined(OPENSSL_PPC64LE)
  
  // CRYPTO_is_PPC64LE_vcrypto_capable returns true iff the current CPU supports
  // the Vector.AES category of instructions.
  int CRYPTO_is_PPC64LE_vcrypto_capable(void);
  
  extern unsigned long OPENSSL_ppc64le_hwcap2;
  
  #endif  // OPENSSL_PPC64LE
  
  #if defined(BORINGSSL_DISPATCH_TEST)
  // Runtime CPU dispatch testing support
  
  // BORINGSSL_function_hit is an array of flags. The following functions will
  // set these flags if BORINGSSL_DISPATCH_TEST is defined.
  //   0: aes_hw_ctr32_encrypt_blocks
  //   1: aes_hw_encrypt
  //   2: aesni_gcm_encrypt
  //   3: aes_hw_set_encrypt_key
  //   4: vpaes_encrypt
  //   5: vpaes_set_encrypt_key
  extern uint8_t BORINGSSL_function_hit[7];
  #endif  // BORINGSSL_DISPATCH_TEST
  
  
  #if defined(__cplusplus)
  }  // extern C
  #endif
  
  #endif  // OPENSSL_HEADER_CPU_H
  