/* 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 #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(__cplusplus) } /* extern C */ #endif #endif /* OPENSSL_HEADER_CPU_H */