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196 lines
7 KiB
C
196 lines
7 KiB
C
/* 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 20 is always zero
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// Bit 28 is adjusted to reflect whether the data cache is shared between
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// multiple logical cores
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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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// Bit 11 is used to indicate AMD XOP support, not SDBG
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// Index 2:
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// EBX for CPUID where EAX = 7
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// Index 3 is set to zero.
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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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#if defined(BORINGSSL_FIPS)
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const uint32_t *OPENSSL_ia32cap_get(void);
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#else
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static inline const uint32_t *OPENSSL_ia32cap_get(void) {
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return OPENSSL_ia32cap_P;
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}
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#endif
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#endif
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#if defined(OPENSSL_ARM) || defined(OPENSSL_AARCH64)
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#if defined(OPENSSL_APPLE)
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// iOS builds use the static ARM configuration.
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#define OPENSSL_STATIC_ARMCAP
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#endif
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#if !defined(OPENSSL_STATIC_ARMCAP)
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// CRYPTO_is_NEON_capable_at_runtime returns true if the current CPU has a NEON
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// unit. Note that |OPENSSL_armcap_P| also exists and contains the same
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// information in a form that's easier for assembly to use.
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OPENSSL_EXPORT char CRYPTO_is_NEON_capable_at_runtime(void);
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// CRYPTO_is_NEON_capable returns true if the current CPU has a NEON unit. If
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// this is known statically then it returns one immediately.
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static inline int CRYPTO_is_NEON_capable(void) {
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// Only statically skip the runtime lookup on aarch64. On arm, one CPU is
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// known to have a broken NEON unit which is known to fail with on some
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// hand-written NEON assembly. For now, continue to apply the workaround even
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// when the compiler is instructed to freely emit NEON code. See
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// https://crbug.com/341598 and https://crbug.com/606629.
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#if defined(__ARM_NEON__) && !defined(OPENSSL_ARM)
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return 1;
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#else
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return CRYPTO_is_NEON_capable_at_runtime();
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#endif
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}
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#if defined(OPENSSL_ARM)
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// CRYPTO_has_broken_NEON returns one if the current CPU is known to have a
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// broken NEON unit. See https://crbug.com/341598.
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OPENSSL_EXPORT int CRYPTO_has_broken_NEON(void);
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// CRYPTO_needs_hwcap2_workaround returns one if the ARMv8 AArch32 AT_HWCAP2
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// workaround was needed. See https://crbug.com/boringssl/46.
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OPENSSL_EXPORT int CRYPTO_needs_hwcap2_workaround(void);
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#endif
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// CRYPTO_is_ARMv8_AES_capable returns true if the current CPU supports the
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// ARMv8 AES instruction.
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int CRYPTO_is_ARMv8_AES_capable(void);
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// CRYPTO_is_ARMv8_PMULL_capable returns true if the current CPU supports the
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// ARMv8 PMULL instruction.
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int CRYPTO_is_ARMv8_PMULL_capable(void);
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#else
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static inline int CRYPTO_is_NEON_capable(void) {
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#if defined(OPENSSL_STATIC_ARMCAP_NEON) || defined(__ARM_NEON__)
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return 1;
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#else
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return 0;
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#endif
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}
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static inline int CRYPTO_is_ARMv8_AES_capable(void) {
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#if defined(OPENSSL_STATIC_ARMCAP_AES) || defined(__ARM_FEATURE_CRYPTO)
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return 1;
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#else
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return 0;
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#endif
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}
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static inline int CRYPTO_is_ARMv8_PMULL_capable(void) {
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#if defined(OPENSSL_STATIC_ARMCAP_PMULL) || defined(__ARM_FEATURE_CRYPTO)
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return 1;
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#else
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return 0;
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#endif
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}
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#endif // OPENSSL_STATIC_ARMCAP
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#endif // OPENSSL_ARM || OPENSSL_AARCH64
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#if defined(OPENSSL_PPC64LE)
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// CRYPTO_is_PPC64LE_vcrypto_capable returns true iff the current CPU supports
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// the Vector.AES category of instructions.
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int CRYPTO_is_PPC64LE_vcrypto_capable(void);
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extern unsigned long OPENSSL_ppc64le_hwcap2;
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#endif // OPENSSL_PPC64LE
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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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