mirror of
https://github.com/Relintai/sdl2_frt.git
synced 2024-12-29 20:27:12 +01:00
271 lines
8.4 KiB
C
271 lines
8.4 KiB
C
/*
|
|
Simple DirectMedia Layer
|
|
Copyright (C) 1997-2019 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_cpuinfo.h
|
|
*
|
|
* CPU feature detection for SDL.
|
|
*/
|
|
|
|
#ifndef SDL_cpuinfo_h_
|
|
#define SDL_cpuinfo_h_
|
|
|
|
#include "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__
|
|
/* Many of the intrinsics SDL uses are not implemented by clang with Visual Studio */
|
|
#undef __MMX__
|
|
#undef __SSE__
|
|
#undef __SSE2__
|
|
#else
|
|
#include <intrin.h>
|
|
#ifndef _WIN64
|
|
#ifndef __MMX__
|
|
#define __MMX__
|
|
#endif
|
|
#ifndef __3dNOW__
|
|
#define __3dNOW__
|
|
#endif
|
|
#endif
|
|
#ifndef __SSE__
|
|
#define __SSE__
|
|
#endif
|
|
#ifndef __SSE2__
|
|
#define __SSE2__
|
|
#endif
|
|
#endif /* __clang__ */
|
|
#elif defined(__MINGW64_VERSION_MAJOR)
|
|
#include <intrin.h>
|
|
#else
|
|
/* altivec.h redefining bool causes a number of problems, see bugs 3993 and 4392, so you need to explicitly define SDL_ENABLE_ALTIVEC_H to have it included. */
|
|
#if defined(HAVE_ALTIVEC_H) && defined(__ALTIVEC__) && !defined(__APPLE_ALTIVEC__) && defined(SDL_ENABLE_ALTIVEC_H)
|
|
#include <altivec.h>
|
|
#endif
|
|
#if !defined(SDL_DISABLE_ARM_NEON_H)
|
|
# if defined(__ARM_NEON)
|
|
# include <arm_neon.h>
|
|
# elif defined(__WINDOWS__) || defined(__WINRT__)
|
|
/* 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)
|
|
# 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)
|
|
# include <arm64intr.h>
|
|
# include <arm64_neon.h>
|
|
# define __ARM_NEON 1 /* Set __ARM_NEON so that it can be used elsewhere, at compile time */
|
|
# endif
|
|
# endif
|
|
#endif
|
|
#if defined(__3dNOW__) && !defined(SDL_DISABLE_MM3DNOW_H)
|
|
#include <mm3dnow.h>
|
|
#endif
|
|
#if defined(HAVE_IMMINTRIN_H) && !defined(SDL_DISABLE_IMMINTRIN_H)
|
|
#include <immintrin.h>
|
|
#else
|
|
#if defined(__MMX__) && !defined(SDL_DISABLE_MMINTRIN_H)
|
|
#include <mmintrin.h>
|
|
#endif
|
|
#if defined(__SSE__) && !defined(SDL_DISABLE_XMMINTRIN_H)
|
|
#include <xmmintrin.h>
|
|
#endif
|
|
#if defined(__SSE2__) && !defined(SDL_DISABLE_EMMINTRIN_H)
|
|
#include <emmintrin.h>
|
|
#endif
|
|
#if defined(__SSE3__) && !defined(SDL_DISABLE_PMMINTRIN_H)
|
|
#include <pmmintrin.h>
|
|
#endif
|
|
#endif /* HAVE_IMMINTRIN_H */
|
|
#endif /* compiler version */
|
|
|
|
#include "begin_code.h"
|
|
/* Set up for C function definitions, even when using C++ */
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/* This is a guess for the cacheline size used for padding.
|
|
* Most x86 processors have a 64 byte cache line.
|
|
* The 64-bit PowerPC processors have a 128 byte cache line.
|
|
* We'll use the larger value to be generally safe.
|
|
*/
|
|
#define SDL_CACHELINE_SIZE 128
|
|
|
|
/**
|
|
* This function returns the number of CPU cores available.
|
|
*/
|
|
extern DECLSPEC int SDLCALL SDL_GetCPUCount(void);
|
|
|
|
/**
|
|
* This function returns the L1 cache line size of the CPU
|
|
*
|
|
* This is useful for determining multi-threaded structure padding
|
|
* or SIMD prefetch sizes.
|
|
*/
|
|
extern DECLSPEC int SDLCALL SDL_GetCPUCacheLineSize(void);
|
|
|
|
/**
|
|
* This function returns true if the CPU has the RDTSC instruction.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_HasRDTSC(void);
|
|
|
|
/**
|
|
* This function returns true if the CPU has AltiVec features.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_HasAltiVec(void);
|
|
|
|
/**
|
|
* This function returns true if the CPU has MMX features.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_HasMMX(void);
|
|
|
|
/**
|
|
* This function returns true if the CPU has 3DNow! features.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_Has3DNow(void);
|
|
|
|
/**
|
|
* This function returns true if the CPU has SSE features.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE(void);
|
|
|
|
/**
|
|
* This function returns true if the CPU has SSE2 features.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE2(void);
|
|
|
|
/**
|
|
* This function returns true if the CPU has SSE3 features.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE3(void);
|
|
|
|
/**
|
|
* This function returns true if the CPU has SSE4.1 features.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE41(void);
|
|
|
|
/**
|
|
* This function returns true if the CPU has SSE4.2 features.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE42(void);
|
|
|
|
/**
|
|
* This function returns true if the CPU has AVX features.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_HasAVX(void);
|
|
|
|
/**
|
|
* This function returns true if the CPU has AVX2 features.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_HasAVX2(void);
|
|
|
|
/**
|
|
* This function returns true if the CPU has AVX-512F (foundation) features.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_HasAVX512F(void);
|
|
|
|
/**
|
|
* This function returns true if the CPU has NEON (ARM SIMD) features.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_HasNEON(void);
|
|
|
|
/**
|
|
* This function returns the amount of RAM configured in the system, in MB.
|
|
*/
|
|
extern DECLSPEC int SDLCALL SDL_GetSystemRAM(void);
|
|
|
|
/**
|
|
* \brief Report the alignment this system needs for SIMD allocations.
|
|
*
|
|
* This will return the minimum number of bytes to which a pointer must be
|
|
* aligned to be compatible with SIMD instructions on the current machine.
|
|
* For example, if the machine supports SSE only, it will return 16, but if
|
|
* it supports AVX-512F, it'll return 64 (etc). This only reports values for
|
|
* instruction sets SDL knows about, so if your SDL build doesn't have
|
|
* SDL_HasAVX512F(), then it might return 16 for the SSE support it sees and
|
|
* not 64 for the AVX-512 instructions that exist but SDL doesn't know about.
|
|
* Plan accordingly.
|
|
*/
|
|
extern DECLSPEC size_t SDLCALL SDL_SIMDGetAlignment(void);
|
|
|
|
/**
|
|
* \brief Allocate memory in a SIMD-friendly way.
|
|
*
|
|
* This will allocate a block of memory that is suitable for use with SIMD
|
|
* instructions. Specifically, it will be properly aligned and padded for
|
|
* the system's supported vector instructions.
|
|
*
|
|
* The memory returned will be padded such that it is safe to read or write
|
|
* an incomplete vector at the end of the memory block. This can be useful
|
|
* so you don't have to drop back to a scalar fallback at the end of your
|
|
* SIMD processing loop to deal with the final elements without overflowing
|
|
* the allocated buffer.
|
|
*
|
|
* You must free this memory with SDL_FreeSIMD(), not free() or SDL_free()
|
|
* or delete[], etc.
|
|
*
|
|
* Note that SDL will only deal with SIMD instruction sets it is aware of;
|
|
* for example, SDL 2.0.8 knows that SSE wants 16-byte vectors
|
|
* (SDL_HasSSE()), and AVX2 wants 32 bytes (SDL_HasAVX2()), but doesn't
|
|
* know that AVX-512 wants 64. To be clear: if you can't decide to use an
|
|
* instruction set with an SDL_Has*() function, don't use that instruction
|
|
* set with memory allocated through here.
|
|
*
|
|
* SDL_AllocSIMD(0) will return a non-NULL pointer, assuming the system isn't
|
|
* out of memory.
|
|
*
|
|
* \param len The length, in bytes, of the block to allocated. The actual
|
|
* allocated block might be larger due to padding, etc.
|
|
* \return Pointer to newly-allocated block, NULL if out of memory.
|
|
*
|
|
* \sa SDL_SIMDAlignment
|
|
* \sa SDL_SIMDFree
|
|
*/
|
|
extern DECLSPEC void * SDLCALL SDL_SIMDAlloc(const size_t len);
|
|
|
|
/**
|
|
* \brief Deallocate memory obtained from SDL_SIMDAlloc
|
|
*
|
|
* It is not valid to use this function on a pointer from anything but
|
|
* SDL_SIMDAlloc(). It can't be used on pointers from malloc, realloc,
|
|
* SDL_malloc, memalign, new[], etc.
|
|
*
|
|
* However, SDL_SIMDFree(NULL) is a legal no-op.
|
|
*
|
|
* \sa SDL_SIMDAlloc
|
|
*/
|
|
extern DECLSPEC void SDLCALL SDL_SIMDFree(void *ptr);
|
|
|
|
/* vi: set ts=4 sw=4 expandtab: */
|
|
/* Ends C function definitions when using C++ */
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
#include "close_code.h"
|
|
|
|
#endif /* SDL_cpuinfo_h_ */
|
|
|
|
/* vi: set ts=4 sw=4 expandtab: */
|