include/SDL_cpuinfo.h
author Sam Lantinga <slouken@libsdl.org>
Fri, 10 Nov 2017 14:22:21 -0800
changeset 11698 c5ae532b96d0
parent 11330 6ae35c5f7f7b
child 11699 afe271f50c70
permissions -rw-r--r--
Replaced the intrinsics header with the single header that includes all intrinsics so we can use AVX, etc.
     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 #ifdef __clang__
    37 /* Many of the intrinsics SDL uses are not implemented by clang with Visual Studio */
    38 #undef __MMX__
    39 #undef __SSE__
    40 #undef __SSE2__
    41 #else
    42 #include <intrin.h>
    43 #ifndef _WIN64
    44 #define __MMX__
    45 #define __3dNOW__
    46 #endif
    47 #define __SSE__
    48 #define __SSE2__
    49 #endif /* __clang__ */
    50 #elif defined(__MINGW64_VERSION_MAJOR)
    51 #include <intrin.h>
    52 #else
    53 #ifdef __ALTIVEC__
    54 #if HAVE_ALTIVEC_H && !defined(__APPLE_ALTIVEC__)
    55 #include <altivec.h>
    56 #undef pixel
    57 #endif
    58 #endif
    59 #ifdef __3dNOW__
    60 #include <mm3dnow.h>
    61 #endif
    62 #include <immintrin.h>
    63 #endif
    64 
    65 #include "begin_code.h"
    66 /* Set up for C function definitions, even when using C++ */
    67 #ifdef __cplusplus
    68 extern "C" {
    69 #endif
    70 
    71 /* This is a guess for the cacheline size used for padding.
    72  * Most x86 processors have a 64 byte cache line.
    73  * The 64-bit PowerPC processors have a 128 byte cache line.
    74  * We'll use the larger value to be generally safe.
    75  */
    76 #define SDL_CACHELINE_SIZE  128
    77 
    78 /**
    79  *  This function returns the number of CPU cores available.
    80  */
    81 extern DECLSPEC int SDLCALL SDL_GetCPUCount(void);
    82 
    83 /**
    84  *  This function returns the L1 cache line size of the CPU
    85  *
    86  *  This is useful for determining multi-threaded structure padding
    87  *  or SIMD prefetch sizes.
    88  */
    89 extern DECLSPEC int SDLCALL SDL_GetCPUCacheLineSize(void);
    90 
    91 /**
    92  *  This function returns true if the CPU has the RDTSC instruction.
    93  */
    94 extern DECLSPEC SDL_bool SDLCALL SDL_HasRDTSC(void);
    95 
    96 /**
    97  *  This function returns true if the CPU has AltiVec features.
    98  */
    99 extern DECLSPEC SDL_bool SDLCALL SDL_HasAltiVec(void);
   100 
   101 /**
   102  *  This function returns true if the CPU has MMX features.
   103  */
   104 extern DECLSPEC SDL_bool SDLCALL SDL_HasMMX(void);
   105 
   106 /**
   107  *  This function returns true if the CPU has 3DNow! features.
   108  */
   109 extern DECLSPEC SDL_bool SDLCALL SDL_Has3DNow(void);
   110 
   111 /**
   112  *  This function returns true if the CPU has SSE features.
   113  */
   114 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE(void);
   115 
   116 /**
   117  *  This function returns true if the CPU has SSE2 features.
   118  */
   119 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE2(void);
   120 
   121 /**
   122  *  This function returns true if the CPU has SSE3 features.
   123  */
   124 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE3(void);
   125 
   126 /**
   127  *  This function returns true if the CPU has SSE4.1 features.
   128  */
   129 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE41(void);
   130 
   131 /**
   132  *  This function returns true if the CPU has SSE4.2 features.
   133  */
   134 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE42(void);
   135 
   136 /**
   137  *  This function returns true if the CPU has AVX features.
   138  */
   139 extern DECLSPEC SDL_bool SDLCALL SDL_HasAVX(void);
   140 
   141 /**
   142  *  This function returns true if the CPU has AVX2 features.
   143  */
   144 extern DECLSPEC SDL_bool SDLCALL SDL_HasAVX2(void);
   145 
   146 /**
   147  *  This function returns true if the CPU has NEON (ARM SIMD) features.
   148  */
   149 extern DECLSPEC SDL_bool SDLCALL SDL_HasNEON(void);
   150 
   151 /**
   152  *  This function returns the amount of RAM configured in the system, in MB.
   153  */
   154 extern DECLSPEC int SDLCALL SDL_GetSystemRAM(void);
   155 
   156 
   157 /* Ends C function definitions when using C++ */
   158 #ifdef __cplusplus
   159 }
   160 #endif
   161 #include "close_code.h"
   162 
   163 #endif /* SDL_cpuinfo_h_ */
   164 
   165 /* vi: set ts=4 sw=4 expandtab: */