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- /* 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 <openssl/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 is set to zero.
- //
- // 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)
- const uint32_t *OPENSSL_ia32cap_get(void);
- #else
- static 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 char CRYPTO_is_NEON_capable_at_runtime(void);
-
- // CRYPTO_is_NEON_capable returns true if the current CPU has a NEON unit. If
- // this is known statically then it returns one immediately.
- static inline int CRYPTO_is_NEON_capable(void) {
- // Only statically skip the runtime lookup on aarch64. On arm, one CPU is
- // known to have a broken NEON unit which is known to fail with on some
- // hand-written NEON assembly. For now, continue to apply the workaround even
- // when the compiler is instructed to freely emit NEON code. See
- // https://crbug.com/341598 and https://crbug.com/606629.
- #if defined(__ARM_NEON__) && !defined(OPENSSL_ARM)
- return 1;
- #else
- return CRYPTO_is_NEON_capable_at_runtime();
- #endif
- }
-
- #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);
- #endif
-
- // CRYPTO_is_ARMv8_AES_capable returns true if the current CPU supports the
- // ARMv8 AES instruction.
- int CRYPTO_is_ARMv8_AES_capable(void);
-
- // CRYPTO_is_ARMv8_PMULL_capable returns true if the current CPU supports the
- // ARMv8 PMULL instruction.
- int CRYPTO_is_ARMv8_PMULL_capable(void);
-
- #else
-
- static inline int CRYPTO_is_NEON_capable(void) {
- #if defined(OPENSSL_STATIC_ARMCAP_NEON) || defined(__ARM_NEON__)
- return 1;
- #else
- return 0;
- #endif
- }
-
- static inline int CRYPTO_is_ARMv8_AES_capable(void) {
- #if defined(OPENSSL_STATIC_ARMCAP_AES) || defined(__ARM_FEATURE_CRYPTO)
- return 1;
- #else
- return 0;
- #endif
- }
-
- static inline int CRYPTO_is_ARMv8_PMULL_capable(void) {
- #if defined(OPENSSL_STATIC_ARMCAP_PMULL) || defined(__ARM_FEATURE_CRYPTO)
- return 1;
- #else
- return 0;
- #endif
- }
-
- #endif // OPENSSL_STATIC_ARMCAP
- #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(__cplusplus)
- } // extern C
- #endif
-
- #endif // OPENSSL_HEADER_CPU_H
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