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