include/SDL_cpuinfo.h
author Ryan C. Gordon <icculus@icculus.org>
Mon, 23 Jan 2017 01:05:44 -0500
changeset 10835 0e9e7a128391
parent 10737 3406a0f8b041
child 11330 6ae35c5f7f7b
permissions -rw-r--r--
audio: Wired up new SSE code to build system.
     1 /*
     2   Simple DirectMedia Layer
     3   Copyright (C) 1997-2017 Sam Lantinga <slouken@libsdl.org>
     4 
     5   This software is provided 'as-is', without any express or implied
     6   warranty.  In no event will the authors be held liable for any damages
     7   arising from the use of this software.
     8 
     9   Permission is granted to anyone to use this software for any purpose,
    10   including commercial applications, and to alter it and redistribute it
    11   freely, subject to the following restrictions:
    12 
    13   1. The origin of this software must not be misrepresented; you must not
    14      claim that you wrote the original software. If you use this software
    15      in a product, an acknowledgment in the product documentation would be
    16      appreciated but is not required.
    17   2. Altered source versions must be plainly marked as such, and must not be
    18      misrepresented as being the original software.
    19   3. This notice may not be removed or altered from any source distribution.
    20 */
    21 
    22 /**
    23  *  \file SDL_cpuinfo.h
    24  *
    25  *  CPU feature detection for SDL.
    26  */
    27 
    28 #ifndef SDL_cpuinfo_h_
    29 #define SDL_cpuinfo_h_
    30 
    31 #include "SDL_stdinc.h"
    32 
    33 /* Need to do this here because intrin.h has C++ code in it */
    34 /* Visual Studio 2005 has a bug where intrin.h conflicts with winnt.h */
    35 #if defined(_MSC_VER) && (_MSC_VER >= 1500) && (defined(_M_IX86) || defined(_M_X64))
    36 #include <intrin.h>
    37 #ifndef _WIN64
    38 #define __MMX__
    39 #define __3dNOW__
    40 #endif
    41 #define __SSE__
    42 #define __SSE2__
    43 #elif defined(__MINGW64_VERSION_MAJOR)
    44 #include <intrin.h>
    45 #else
    46 #ifdef __ALTIVEC__
    47 #if HAVE_ALTIVEC_H && !defined(__APPLE_ALTIVEC__)
    48 #include <altivec.h>
    49 #undef pixel
    50 #endif
    51 #endif
    52 #ifdef __MMX__
    53 #include <mmintrin.h>
    54 #endif
    55 #ifdef __3dNOW__
    56 #include <mm3dnow.h>
    57 #endif
    58 #ifdef __SSE__
    59 #include <xmmintrin.h>
    60 #endif
    61 #ifdef __SSE2__
    62 #include <emmintrin.h>
    63 #endif
    64 #ifdef __SSE3__
    65 #include <pmmintrin.h>
    66 #endif
    67 #endif
    68 
    69 #include "begin_code.h"
    70 /* Set up for C function definitions, even when using C++ */
    71 #ifdef __cplusplus
    72 extern "C" {
    73 #endif
    74 
    75 /* This is a guess for the cacheline size used for padding.
    76  * Most x86 processors have a 64 byte cache line.
    77  * The 64-bit PowerPC processors have a 128 byte cache line.
    78  * We'll use the larger value to be generally safe.
    79  */
    80 #define SDL_CACHELINE_SIZE  128
    81 
    82 /**
    83  *  This function returns the number of CPU cores available.
    84  */
    85 extern DECLSPEC int SDLCALL SDL_GetCPUCount(void);
    86 
    87 /**
    88  *  This function returns the L1 cache line size of the CPU
    89  *
    90  *  This is useful for determining multi-threaded structure padding
    91  *  or SIMD prefetch sizes.
    92  */
    93 extern DECLSPEC int SDLCALL SDL_GetCPUCacheLineSize(void);
    94 
    95 /**
    96  *  This function returns true if the CPU has the RDTSC instruction.
    97  */
    98 extern DECLSPEC SDL_bool SDLCALL SDL_HasRDTSC(void);
    99 
   100 /**
   101  *  This function returns true if the CPU has AltiVec features.
   102  */
   103 extern DECLSPEC SDL_bool SDLCALL SDL_HasAltiVec(void);
   104 
   105 /**
   106  *  This function returns true if the CPU has MMX features.
   107  */
   108 extern DECLSPEC SDL_bool SDLCALL SDL_HasMMX(void);
   109 
   110 /**
   111  *  This function returns true if the CPU has 3DNow! features.
   112  */
   113 extern DECLSPEC SDL_bool SDLCALL SDL_Has3DNow(void);
   114 
   115 /**
   116  *  This function returns true if the CPU has SSE features.
   117  */
   118 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE(void);
   119 
   120 /**
   121  *  This function returns true if the CPU has SSE2 features.
   122  */
   123 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE2(void);
   124 
   125 /**
   126  *  This function returns true if the CPU has SSE3 features.
   127  */
   128 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE3(void);
   129 
   130 /**
   131  *  This function returns true if the CPU has SSE4.1 features.
   132  */
   133 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE41(void);
   134 
   135 /**
   136  *  This function returns true if the CPU has SSE4.2 features.
   137  */
   138 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE42(void);
   139 
   140 /**
   141  *  This function returns true if the CPU has AVX features.
   142  */
   143 extern DECLSPEC SDL_bool SDLCALL SDL_HasAVX(void);
   144 
   145 /**
   146  *  This function returns true if the CPU has AVX2 features.
   147  */
   148 extern DECLSPEC SDL_bool SDLCALL SDL_HasAVX2(void);
   149 
   150 /**
   151  *  This function returns true if the CPU has NEON (ARM SIMD) features.
   152  */
   153 extern DECLSPEC SDL_bool SDLCALL SDL_HasNEON(void);
   154 
   155 /**
   156  *  This function returns the amount of RAM configured in the system, in MB.
   157  */
   158 extern DECLSPEC int SDLCALL SDL_GetSystemRAM(void);
   159 
   160 
   161 /* Ends C function definitions when using C++ */
   162 #ifdef __cplusplus
   163 }
   164 #endif
   165 #include "close_code.h"
   166 
   167 #endif /* SDL_cpuinfo_h_ */
   168 
   169 /* vi: set ts=4 sw=4 expandtab: */