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Diffstat (limited to 'linux-x86_64/include/openssl/cpu.h')
| -rw-r--r-- | linux-x86_64/include/openssl/cpu.h | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/linux-x86_64/include/openssl/cpu.h b/linux-x86_64/include/openssl/cpu.h new file mode 100644 index 0000000..457a476 --- /dev/null +++ b/linux-x86_64/include/openssl/cpu.h @@ -0,0 +1,181 @@ +/* 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]; +#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) + return 1; +#else + return 0; +#endif +} + +static inline int CRYPTO_is_ARMv8_PMULL_capable(void) { +#if defined(OPENSSL_STATIC_ARMCAP_PMULL) + 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); + +#endif /* OPENSSL_PPC64LE */ + + +#if defined(__cplusplus) +} /* extern C */ +#endif + +#endif /* OPENSSL_HEADER_CPU_H */ |