Aaru.Checksums.Native/simd.h

/*
 * This file is part of the Aaru Data Preservation Suite.
 * Copyright (c) 2019-2025 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/>.
 */

#ifndef AARU_CHECKSUMS_NATIVE_SIMD_H
#define AARU_CHECKSUMS_NATIVE_SIMD_H

#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 TARGET_WITH_AVX2
#define TARGET_WITH_SSSE3
#define TARGET_WITH_CLMUL
#else
#define TARGET_WITH_AVX2  __attribute__((target("avx2")))
#define TARGET_WITH_SSSE3 __attribute__((target("ssse3")))
#define TARGET_WITH_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_NEON

#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_NEON
#else

#if(__ARM_ARCH >= 7 || defined(__ARM_ARCH_8A))

#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_7A__

#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_NEON __attribute__((target("neon")))
#else
#define TARGET_WITH_NEON __attribute__((target("fpu=neon")))
#endif

#endif  // __aarch64__ || _M_ARM64

#endif  // _MSC_VER

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

#endif  // AARU_CHECKSUMS_NATIVE_CRC32_SIMD_H