Aaru.Checksums.Native/simd.h

/*
* This file is part of the Aaru Data Preservation Suite.
* Copyright (c) 2019-2021 Natalia Portillo.
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of the
* License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/

#ifdef _MSC_VER
#define ALIGNED_(n) __declspec(align(n))
#else
#define ALIGNED_(n) __attribute__((aligned(n)))
#endif

#if defined(__x86_64__) || defined(__amd64) || defined(_M_AMD64) || defined(_M_X64) || defined(__I386__) ||            \
    defined(__i386__) || defined(__THW_INTEL) || defined(_M_IX86)

#ifdef _MSC_VER
#define AVX2
#define SSSE3
#define CLMUL
#else
#define AVX2 __attribute__((target("avx2")))
#define SSSE3 __attribute__((target("ssse3")))
#define CLMUL __attribute__((target("pclmul,sse4.1")))
#endif

AARU_EXPORT int have_clmul(void);
AARU_EXPORT int have_ssse3(void);
AARU_EXPORT int have_avx2(void);
#endif

#if(defined(__arm__) || defined(_M_ARM)) && !defined(_WIN32)
#define HWCAP_NEON (1 << 12)
#define HWCAP2_AES (1 << 0)
#define HWCAP2_CRC32 (1 << 4)
#endif

#if(defined(__aarch64__) || defined(_M_ARM64)) && !defined(_WIN32)
#define HWCAP_NEON (1 << 1)
#define HWCAP_AES (1 << 3)
#define HWCAP_CRC32 (1 << 7)
#endif

#if defined(__aarch64__) || defined(_M_ARM64) || defined(__arm__) || defined(_M_ARM)
AARU_EXPORT int have_neon(void);
AARU_EXPORT int have_arm_crc32(void);
AARU_EXPORT int have_arm_crypto(void);
#endif

#if defined(__aarch64__) || defined(_M_ARM64) || defined(__arm__) || defined(_M_ARM)

#ifndef __ARM_FEATURE_CRC32
#define __ARM_FEATURE_CRC32 1
#endif

#ifdef _MSC_VER

#define TARGET_ARMV8_WITH_CRC
#define TARGET_WITH_CRYPTO
#define TARGET_WITH_SIMD

#else // _MSC_VER

#if defined(__aarch64__) || defined(_M_ARM64)

#ifdef __clang__
#define TARGET_ARMV8_WITH_CRC __attribute__((target("crc")))
#else
#define TARGET_ARMV8_WITH_CRC __attribute__((target("+crc")))
#endif

#ifdef __clang__
#define TARGET_WITH_CRYPTO __attribute__((target("crypto")))
#else
#define TARGET_WITH_CRYPTO __attribute__((target("+crypto")))
#endif

#define TARGET_WITH_SIMD
#else

#if __ARM_ARCH >= 8

#ifdef __clang__
#define TARGET_ARMV8_WITH_CRC __attribute__((target("armv8-a,crc")))
#else
#define TARGET_ARMV8_WITH_CRC __attribute__((target("arch=armv8-a+crc")))
#endif

#endif // __ARM_ARCH >= 8

#ifdef __clang__
#define TARGET_WITH_CRYPTO __attribute__((target("armv8-a,crypto")))
#else
#define TARGET_WITH_CRYPTO __attribute__((target("fpu=crypto-neon-fp-armv8")))
#endif

#ifdef __clang__
#define TARGET_WITH_SIMD __attribute__((target("neon")))
#else
#define TARGET_WITH_SIMD __attribute__((target("fpu=neon")))
#endif

#endif // __aarch64__ || _M_ARM64

#endif // _MSC_VER

#endif // __aarch64__ || _M_ARM64 || __arm__ || _M_ARM