SDL/include/SDL3/SDL_intrin.h

/*
  Simple DirectMedia Layer
  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>

  This software is provided 'as-is', without any express or implied
  warranty.  In no event will the authors be held liable for any damages
  arising from the use of this software.

  Permission is granted to anyone to use this software for any purpose,
  including commercial applications, and to alter it and redistribute it
  freely, subject to the following restrictions:

  1. The origin of this software must not be misrepresented; you must not
     claim that you wrote the original software. If you use this software
     in a product, an acknowledgment in the product documentation would be
     appreciated but is not required.
  2. Altered source versions must be plainly marked as such, and must not be
     misrepresented as being the original software.
  3. This notice may not be removed or altered from any source distribution.
*/

/**
 *  \file SDL_intrin.h
 *
 *  \brief Header file for CPU intrinsics for SDL
 */

#ifndef SDL_intrin_h_
#define SDL_intrin_h_

#include <SDL3/SDL_stdinc.h>

/* Need to do this here because intrin.h has C++ code in it */
/* Visual Studio 2005 has a bug where intrin.h conflicts with winnt.h */
#if defined(_MSC_VER) && (_MSC_VER >= 1500) && (defined(_M_IX86) || defined(_M_X64))
#ifdef __clang__
/* As of Clang 11, '_m_prefetchw' is conflicting with the winnt.h's version,
   so we define the needed '_m_prefetch' here as a pseudo-header, until the issue is fixed. */
#ifndef __PRFCHWINTRIN_H
#define __PRFCHWINTRIN_H
static __inline__ void __attribute__((__always_inline__, __nodebug__))
_m_prefetch(void *__P)
{
  __builtin_prefetch (__P, 0, 3 /* _MM_HINT_T0 */);
}
#endif /* __PRFCHWINTRIN_H */
#endif /* __clang__ */
#include <intrin.h>

#elif defined(__MINGW64_VERSION_MAJOR)
#include <intrin.h>
#if defined(__ARM_NEON) && !defined(SDL_DISABLE_NEON)
#  define SDL_NEON_INTRINSICS 1
#  include <arm_neon.h>
#endif

#else
/* altivec.h redefining bool causes a number of problems, see bugs 3993 and 4392, so you need to explicitly define SDL_ENABLE_ALTIVEC to have it included. */
#if defined(__ALTIVEC__) && defined(SDL_ENABLE_ALTIVEC)
#define SDL_ALTIVEC_INTRINSICS 1
#include <altivec.h>
#endif
#if !defined(SDL_DISABLE_NEON)
#  if defined(__ARM_NEON)
#    define SDL_NEON_INTRINSICS 1
#    include <arm_neon.h>
#  elif defined(__WINDOWS__) || defined(__WINRT__) || defined(__GDK__)
/* Visual Studio doesn't define __ARM_ARCH, but _M_ARM (if set, always 7), and _M_ARM64 (if set, always 1). */
#    if defined(_M_ARM)
#      define SDL_NEON_INTRINSICS 1
#      include <armintr.h>
#      include <arm_neon.h>
#      define __ARM_NEON 1 /* Set __ARM_NEON so that it can be used elsewhere, at compile time */
#    endif
#    if defined (_M_ARM64)
#      define SDL_NEON_INTRINSICS 1
#      include <arm64intr.h>
#      include <arm64_neon.h>
#      define __ARM_NEON 1 /* Set __ARM_NEON so that it can be used elsewhere, at compile time */
#      define __ARM_ARCH 8
#    endif
#  endif
#endif
#endif /* compiler version */

#if defined(__clang__) && defined(__has_attribute)
# if __has_attribute(target)
# define SDL_HAS_TARGET_ATTRIBS
# endif
#elif defined(__GNUC__) && (__GNUC__ + (__GNUC_MINOR__ >= 9) > 4) /* gcc >= 4.9 */
# define SDL_HAS_TARGET_ATTRIBS
#endif

#ifdef SDL_HAS_TARGET_ATTRIBS
# define SDL_TARGETING(x) __attribute__((target(x)))
#else
# define SDL_TARGETING(x)
#endif

#if defined(__loongarch_sx) && !defined(SDL_DISABLE_LSX)
# define SDL_LSX_INTRINSICS 1
# include <lsxintrin.h>
#endif

#if defined(__loongarch_asx) && !defined(SDL_DISABLE_LASX)
# define SDL_LASX_INTRINSICS 1
# include <lasxintrin.h>
#endif

#if defined(__x86_64__) || defined(_M_X64) || defined(__i386__) || defined(_M_IX86)
# if (defined(_MSC_VER) || defined(__AVX__) || defined(SDL_HAS_TARGET_ATTRIBS)) && !defined(SDL_DISABLE_AVX)
#  define SDL_AVX_INTRINSICS
#  include <immintrin.h>
# endif
# if ((defined(_MSC_VER) && !defined(_M_X64)) || defined(__MMX__) || defined(SDL_HAS_TARGET_ATTRIBS)) && !defined(SDL_DISABLE_MMX)
#  define SDL_MMX_INTRINSICS 1
#  include <mmintrin.h>
# endif
# if (defined(_MSC_VER) || defined(__SSE__) || defined(SDL_HAS_TARGET_ATTRIBS)) && !defined(SDL_DISABLE_SSE)
   /* x86 MSVC defines _M_IX86_FP == 1 when compiled with /arch:SSE */
#  define SDL_SSE_INTRINSICS 1
#  include <xmmintrin.h>
# endif
# if (defined(_MSC_VER) || defined(__SSE2__) || defined(SDL_HAS_TARGET_ATTRIBS)) && !defined(SDL_DISABLE_SSE2)
   /* x86 MSVC defines _M_IX86_FP == 2 when compiled with /arch:SSE2 */
#  define SDL_SSE2_INTRINSICS 1
#  include <emmintrin.h>
# endif
# if (defined(_MSC_VER) || defined(__SSE3__) || defined(SDL_HAS_TARGET_ATTRIBS)) && !defined(SDL_DISABLE_SSE3)
   /* x86 MSVC does not provide macro's to detect SSE3/SSE4 */
#  define SDL_SSE3_INTRINSICS 1
#  include <pmmintrin.h>
# endif
#endif /* defined(__x86_64__) || defined(_M_X64) || defined(__i386__) || defined(_M_IX86) */

#endif /* SDL_intrin_h_ */