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121 lines
5.4 KiB
121 lines
5.4 KiB
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com). */
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#ifndef OPENSSL_HEADER_CPU_H
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#define OPENSSL_HEADER_CPU_H
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#include <openssl/base.h>
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#if defined(__cplusplus)
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extern "C" {
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#endif
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/* Runtime CPU feature support */
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#if defined(OPENSSL_X86) || defined(OPENSSL_X86_64)
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/* OPENSSL_ia32cap_P contains the Intel CPUID bits when running on an x86 or
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* x86-64 system.
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*
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* Index 0:
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* EDX for CPUID where EAX = 1
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* Bit 30 is used to indicate an Intel CPU
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* Index 1:
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* ECX for CPUID where EAX = 1
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* Index 2:
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* EBX for CPUID where EAX = 7
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*
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* Note: the CPUID bits are pre-adjusted for the OSXSAVE bit and the YMM and XMM
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* bits in XCR0, so it is not necessary to check those. */
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extern uint32_t OPENSSL_ia32cap_P[4];
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#endif
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#if defined(OPENSSL_ARM) || defined(OPENSSL_AARCH64)
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/* CRYPTO_is_NEON_capable returns true if the current CPU has a NEON unit. Note
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* that |OPENSSL_armcap_P| also exists and contains the same information in a
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* form that's easier for assembly to use. */
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OPENSSL_EXPORT char CRYPTO_is_NEON_capable(void);
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/* CRYPTO_set_NEON_capable sets the return value of |CRYPTO_is_NEON_capable|.
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* By default, unless the code was compiled with |-mfpu=neon|, NEON is assumed
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* not to be present. It is not autodetected. Calling this with a zero
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* argument also causes |CRYPTO_is_NEON_functional| to return false. */
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OPENSSL_EXPORT void CRYPTO_set_NEON_capable(char neon_capable);
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/* CRYPTO_is_NEON_functional returns true if the current CPU has a /working/
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* NEON unit. Some phones have a NEON unit, but the Poly1305 NEON code causes
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* it to fail. See https://code.google.com/p/chromium/issues/detail?id=341598 */
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OPENSSL_EXPORT char CRYPTO_is_NEON_functional(void);
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/* CRYPTO_set_NEON_functional sets the "NEON functional" flag. For
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* |CRYPTO_is_NEON_functional| to return true, both this flag and the NEON flag
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* must be true. By default NEON is assumed to be functional if the code was
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* compiled with |-mfpu=neon| or if |CRYPTO_set_NEON_capable| has been called
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* with a non-zero argument. */
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OPENSSL_EXPORT void CRYPTO_set_NEON_functional(char neon_functional);
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#endif /* OPENSSL_ARM */
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#if defined(__cplusplus)
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} /* extern C */
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#endif
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#endif /* OPENSSL_HEADER_CPU_H */
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