// Copyright © 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016,
//             2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024
//           Vladimír Vondruš <mosra@centrum.cz> and contributors
// Copyright © 2020-2024 Dan R.
//
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/** @file
	@brief Intrinsics for x86 SSE2 instructions

	Equivalent to @cpp #include <emmintrin.h> @ce on most compilers except for GCC
	4.8, where it contains an additional workaround to make the instructions
	available with just the @ref DEATH_ENABLE_SSE2 function attribute instead of
	having to specify `-msse2` for the whole compilation unit.
	@see @relativeref{Death,Cpu}, @ref Cpu-usage-target-attributes,
		@ref IntrinsicsSse3.h, @ref IntrinsicsSsse3.h, @ref IntrinsicsSse4.h,
		@ref IntrinsicsAvx.h
*/

// See https://gist.github.com/rygorous/f26f5f60284d9d9246f6 for more info. If it wouldn't be for the #define,
// it could be all put into a macro with _Pragma to wrap around the include, but because I do, there has to be one
// wrapper header for each include.

#if defined(DEATH_TARGET_GCC) && !defined(DEATH_TARGET_CLANG) && __GNUC__*100 + __GNUC_MINOR__ < 409
#pragma GCC push_options
#pragma GCC target("sse2")
#pragma push_macro("__SSE2__")
#if !defined(__SSE2__)
#	define __SSE2__
#endif
#endif
#include <emmintrin.h>
#if defined(DEATH_TARGET_GCC) && !defined(DEATH_TARGET_CLANG) && __GNUC__*100 + __GNUC_MINOR__ < 409
#pragma pop_macro("__SSE2__")
#pragma GCC pop_options
#endif