304 lines
8.5 KiB
C
304 lines
8.5 KiB
C
/*
|
|
Simple DirectMedia Layer
|
|
Copyright (C) 1997-2024 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 <SDL3/SDL_stdinc.h>
|
|
|
|
#include <SDL3/SDL_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
|
|
|
|
/**
|
|
* Get the number of CPU cores available.
|
|
*
|
|
* \returns the total number of logical CPU cores. On CPUs that include
|
|
* technologies such as hyperthreading, the number of logical cores
|
|
* may be more than the number of physical cores.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC int SDLCALL SDL_GetCPUCount(void);
|
|
|
|
/**
|
|
* Determine the L1 cache line size of the CPU.
|
|
*
|
|
* This is useful for determining multi-threaded structure padding or SIMD
|
|
* prefetch sizes.
|
|
*
|
|
* \returns the L1 cache line size of the CPU, in bytes.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC int SDLCALL SDL_GetCPUCacheLineSize(void);
|
|
|
|
/**
|
|
* Determine whether the CPU has AltiVec features.
|
|
*
|
|
* This always returns false on CPUs that aren't using PowerPC instruction
|
|
* sets.
|
|
*
|
|
* \returns SDL_TRUE if the CPU has AltiVec features or SDL_FALSE if not.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_HasAltiVec(void);
|
|
|
|
/**
|
|
* Determine whether the CPU has MMX features.
|
|
*
|
|
* This always returns false on CPUs that aren't using Intel instruction sets.
|
|
*
|
|
* \returns SDL_TRUE if the CPU has MMX features or SDL_FALSE if not.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_HasMMX(void);
|
|
|
|
/**
|
|
* Determine whether the CPU has SSE features.
|
|
*
|
|
* This always returns false on CPUs that aren't using Intel instruction sets.
|
|
*
|
|
* \returns SDL_TRUE if the CPU has SSE features or SDL_FALSE if not.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_HasSSE2
|
|
* \sa SDL_HasSSE3
|
|
* \sa SDL_HasSSE41
|
|
* \sa SDL_HasSSE42
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE(void);
|
|
|
|
/**
|
|
* Determine whether the CPU has SSE2 features.
|
|
*
|
|
* This always returns false on CPUs that aren't using Intel instruction sets.
|
|
*
|
|
* \returns SDL_TRUE if the CPU has SSE2 features or SDL_FALSE if not.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_HasSSE
|
|
* \sa SDL_HasSSE3
|
|
* \sa SDL_HasSSE41
|
|
* \sa SDL_HasSSE42
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE2(void);
|
|
|
|
/**
|
|
* Determine whether the CPU has SSE3 features.
|
|
*
|
|
* This always returns false on CPUs that aren't using Intel instruction sets.
|
|
*
|
|
* \returns SDL_TRUE if the CPU has SSE3 features or SDL_FALSE if not.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_HasSSE
|
|
* \sa SDL_HasSSE2
|
|
* \sa SDL_HasSSE41
|
|
* \sa SDL_HasSSE42
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE3(void);
|
|
|
|
/**
|
|
* Determine whether the CPU has SSE4.1 features.
|
|
*
|
|
* This always returns false on CPUs that aren't using Intel instruction sets.
|
|
*
|
|
* \returns SDL_TRUE if the CPU has SSE4.1 features or SDL_FALSE if not.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_HasSSE
|
|
* \sa SDL_HasSSE2
|
|
* \sa SDL_HasSSE3
|
|
* \sa SDL_HasSSE42
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE41(void);
|
|
|
|
/**
|
|
* Determine whether the CPU has SSE4.2 features.
|
|
*
|
|
* This always returns false on CPUs that aren't using Intel instruction sets.
|
|
*
|
|
* \returns SDL_TRUE if the CPU has SSE4.2 features or SDL_FALSE if not.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_HasSSE
|
|
* \sa SDL_HasSSE2
|
|
* \sa SDL_HasSSE3
|
|
* \sa SDL_HasSSE41
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE42(void);
|
|
|
|
/**
|
|
* Determine whether the CPU has AVX features.
|
|
*
|
|
* This always returns false on CPUs that aren't using Intel instruction sets.
|
|
*
|
|
* \returns SDL_TRUE if the CPU has AVX features or SDL_FALSE if not.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_HasAVX2
|
|
* \sa SDL_HasAVX512F
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_HasAVX(void);
|
|
|
|
/**
|
|
* Determine whether the CPU has AVX2 features.
|
|
*
|
|
* This always returns false on CPUs that aren't using Intel instruction sets.
|
|
*
|
|
* \returns SDL_TRUE if the CPU has AVX2 features or SDL_FALSE if not.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_HasAVX
|
|
* \sa SDL_HasAVX512F
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_HasAVX2(void);
|
|
|
|
/**
|
|
* Determine whether the CPU has AVX-512F (foundation) features.
|
|
*
|
|
* This always returns false on CPUs that aren't using Intel instruction sets.
|
|
*
|
|
* \returns SDL_TRUE if the CPU has AVX-512F features or SDL_FALSE if not.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_HasAVX
|
|
* \sa SDL_HasAVX2
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_HasAVX512F(void);
|
|
|
|
/**
|
|
* Determine whether the CPU has ARM SIMD (ARMv6) features.
|
|
*
|
|
* This is different from ARM NEON, which is a different instruction set.
|
|
*
|
|
* This always returns false on CPUs that aren't using ARM instruction sets.
|
|
*
|
|
* \returns SDL_TRUE if the CPU has ARM SIMD features or SDL_FALSE if not.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_HasNEON
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_HasARMSIMD(void);
|
|
|
|
/**
|
|
* Determine whether the CPU has NEON (ARM SIMD) features.
|
|
*
|
|
* This always returns false on CPUs that aren't using ARM instruction sets.
|
|
*
|
|
* \returns SDL_TRUE if the CPU has ARM NEON features or SDL_FALSE if not.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_HasNEON(void);
|
|
|
|
/**
|
|
* Determine whether the CPU has LSX (LOONGARCH SIMD) features.
|
|
*
|
|
* This always returns false on CPUs that aren't using LOONGARCH instruction
|
|
* sets.
|
|
*
|
|
* \returns SDL_TRUE if the CPU has LOONGARCH LSX features or SDL_FALSE if
|
|
* not.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_HasLSX(void);
|
|
|
|
/**
|
|
* Determine whether the CPU has LASX (LOONGARCH SIMD) features.
|
|
*
|
|
* This always returns false on CPUs that aren't using LOONGARCH instruction
|
|
* sets.
|
|
*
|
|
* \returns SDL_TRUE if the CPU has LOONGARCH LASX features or SDL_FALSE if
|
|
* not.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_HasLASX(void);
|
|
|
|
/**
|
|
* Get the amount of RAM configured in the system.
|
|
*
|
|
* \returns the amount of RAM configured in the system in MiB.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC int SDLCALL SDL_GetSystemRAM(void);
|
|
|
|
/**
|
|
* 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.
|
|
*
|
|
* \returns the alignment in bytes needed for available, known SIMD
|
|
* instructions.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_aligned_alloc
|
|
* \sa SDL_aligned_free
|
|
*/
|
|
extern DECLSPEC size_t SDLCALL SDL_SIMDGetAlignment(void);
|
|
|
|
/* Ends C function definitions when using C++ */
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
#include <SDL3/SDL_close_code.h>
|
|
|
|
#endif /* SDL_cpuinfo_h_ */
|