cscg22-gearboy

CSCG 2022 Challenge 'Gearboy'
git clone https://git.sinitax.com/sinitax/cscg22-gearboy
Log | Files | Refs | sfeed.txt

SDL_cpuinfo.h (8751B)

      1/*
      2  Simple DirectMedia Layer
      3  Copyright (C) 1997-2020 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#ifndef __MMX__
     45#define __MMX__
     46#endif
     47#ifndef __3dNOW__
     48#define __3dNOW__
     49#endif
     50#endif
     51#ifndef __SSE__
     52#define __SSE__
     53#endif
     54#ifndef __SSE2__
     55#define __SSE2__
     56#endif
     57#endif /* __clang__ */
     58#elif defined(__MINGW64_VERSION_MAJOR)
     59#include <intrin.h>
     60#else
     61/* 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. */
     62#if defined(HAVE_ALTIVEC_H) && defined(__ALTIVEC__) && !defined(__APPLE_ALTIVEC__) && defined(SDL_ENABLE_ALTIVEC_H)
     63#include <altivec.h>
     64#endif
     65#if !defined(SDL_DISABLE_ARM_NEON_H)
     66#  if defined(__ARM_NEON)
     67#    include <arm_neon.h>
     68#  elif defined(__WINDOWS__) || defined(__WINRT__)
     69/* Visual Studio doesn't define __ARM_ARCH, but _M_ARM (if set, always 7), and _M_ARM64 (if set, always 1). */
     70#    if defined(_M_ARM)
     71#      include <armintr.h>
     72#      include <arm_neon.h>
     73#      define __ARM_NEON 1 /* Set __ARM_NEON so that it can be used elsewhere, at compile time */
     74#    endif
     75#    if defined (_M_ARM64)
     76#      include <arm64intr.h>
     77#      include <arm64_neon.h>
     78#      define __ARM_NEON 1 /* Set __ARM_NEON so that it can be used elsewhere, at compile time */
     79#    endif
     80#  endif
     81#endif
     82#if defined(__3dNOW__) && !defined(SDL_DISABLE_MM3DNOW_H)
     83#include <mm3dnow.h>
     84#endif
     85#if defined(HAVE_IMMINTRIN_H) && !defined(SDL_DISABLE_IMMINTRIN_H)
     86#include <immintrin.h>
     87#else
     88#if defined(__MMX__) && !defined(SDL_DISABLE_MMINTRIN_H)
     89#include <mmintrin.h>
     90#endif
     91#if defined(__SSE__) && !defined(SDL_DISABLE_XMMINTRIN_H)
     92#include <xmmintrin.h>
     93#endif
     94#if defined(__SSE2__) && !defined(SDL_DISABLE_EMMINTRIN_H)
     95#include <emmintrin.h>
     96#endif
     97#if defined(__SSE3__) && !defined(SDL_DISABLE_PMMINTRIN_H)
     98#include <pmmintrin.h>
     99#endif
    100#endif /* HAVE_IMMINTRIN_H */
    101#endif /* compiler version */
    102
    103#include "begin_code.h"
    104/* Set up for C function definitions, even when using C++ */
    105#ifdef __cplusplus
    106extern "C" {
    107#endif
    108
    109/* This is a guess for the cacheline size used for padding.
    110 * Most x86 processors have a 64 byte cache line.
    111 * The 64-bit PowerPC processors have a 128 byte cache line.
    112 * We'll use the larger value to be generally safe.
    113 */
    114#define SDL_CACHELINE_SIZE  128
    115
    116/**
    117 *  This function returns the number of CPU cores available.
    118 */
    119extern DECLSPEC int SDLCALL SDL_GetCPUCount(void);
    120
    121/**
    122 *  This function returns the L1 cache line size of the CPU
    123 *
    124 *  This is useful for determining multi-threaded structure padding
    125 *  or SIMD prefetch sizes.
    126 */
    127extern DECLSPEC int SDLCALL SDL_GetCPUCacheLineSize(void);
    128
    129/**
    130 *  This function returns true if the CPU has the RDTSC instruction.
    131 */
    132extern DECLSPEC SDL_bool SDLCALL SDL_HasRDTSC(void);
    133
    134/**
    135 *  This function returns true if the CPU has AltiVec features.
    136 */
    137extern DECLSPEC SDL_bool SDLCALL SDL_HasAltiVec(void);
    138
    139/**
    140 *  This function returns true if the CPU has MMX features.
    141 */
    142extern DECLSPEC SDL_bool SDLCALL SDL_HasMMX(void);
    143
    144/**
    145 *  This function returns true if the CPU has 3DNow! features.
    146 */
    147extern DECLSPEC SDL_bool SDLCALL SDL_Has3DNow(void);
    148
    149/**
    150 *  This function returns true if the CPU has SSE features.
    151 */
    152extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE(void);
    153
    154/**
    155 *  This function returns true if the CPU has SSE2 features.
    156 */
    157extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE2(void);
    158
    159/**
    160 *  This function returns true if the CPU has SSE3 features.
    161 */
    162extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE3(void);
    163
    164/**
    165 *  This function returns true if the CPU has SSE4.1 features.
    166 */
    167extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE41(void);
    168
    169/**
    170 *  This function returns true if the CPU has SSE4.2 features.
    171 */
    172extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE42(void);
    173
    174/**
    175 *  This function returns true if the CPU has AVX features.
    176 */
    177extern DECLSPEC SDL_bool SDLCALL SDL_HasAVX(void);
    178
    179/**
    180 *  This function returns true if the CPU has AVX2 features.
    181 */
    182extern DECLSPEC SDL_bool SDLCALL SDL_HasAVX2(void);
    183
    184/**
    185 *  This function returns true if the CPU has AVX-512F (foundation) features.
    186 */
    187extern DECLSPEC SDL_bool SDLCALL SDL_HasAVX512F(void);
    188
    189/**
    190 *  This function returns true if the CPU has ARM SIMD (ARMv6) features.
    191 */
    192extern DECLSPEC SDL_bool SDLCALL SDL_HasARMSIMD(void);
    193
    194/**
    195 *  This function returns true if the CPU has NEON (ARM SIMD) features.
    196 */
    197extern DECLSPEC SDL_bool SDLCALL SDL_HasNEON(void);
    198
    199/**
    200 *  This function returns the amount of RAM configured in the system, in MB.
    201 */
    202extern DECLSPEC int SDLCALL SDL_GetSystemRAM(void);
    203
    204/**
    205 * \brief Report the alignment this system needs for SIMD allocations.
    206 *
    207 * This will return the minimum number of bytes to which a pointer must be
    208 *  aligned to be compatible with SIMD instructions on the current machine.
    209 *  For example, if the machine supports SSE only, it will return 16, but if
    210 *  it supports AVX-512F, it'll return 64 (etc). This only reports values for
    211 *  instruction sets SDL knows about, so if your SDL build doesn't have
    212 *  SDL_HasAVX512F(), then it might return 16 for the SSE support it sees and
    213 *  not 64 for the AVX-512 instructions that exist but SDL doesn't know about.
    214 *  Plan accordingly.
    215 */
    216extern DECLSPEC size_t SDLCALL SDL_SIMDGetAlignment(void);
    217
    218/**
    219 * \brief Allocate memory in a SIMD-friendly way.
    220 *
    221 * This will allocate a block of memory that is suitable for use with SIMD
    222 *  instructions. Specifically, it will be properly aligned and padded for
    223 *  the system's supported vector instructions.
    224 *
    225 * The memory returned will be padded such that it is safe to read or write
    226 *  an incomplete vector at the end of the memory block. This can be useful
    227 *  so you don't have to drop back to a scalar fallback at the end of your
    228 *  SIMD processing loop to deal with the final elements without overflowing
    229 *  the allocated buffer.
    230 *
    231 * You must free this memory with SDL_FreeSIMD(), not free() or SDL_free()
    232 *  or delete[], etc.
    233 *
    234 * Note that SDL will only deal with SIMD instruction sets it is aware of;
    235 *  for example, SDL 2.0.8 knows that SSE wants 16-byte vectors
    236 *  (SDL_HasSSE()), and AVX2 wants 32 bytes (SDL_HasAVX2()), but doesn't
    237 *  know that AVX-512 wants 64. To be clear: if you can't decide to use an
    238 *  instruction set with an SDL_Has*() function, don't use that instruction
    239 *  set with memory allocated through here.
    240 *
    241 * SDL_AllocSIMD(0) will return a non-NULL pointer, assuming the system isn't
    242 *  out of memory.
    243 *
    244 *  \param len The length, in bytes, of the block to allocated. The actual
    245 *             allocated block might be larger due to padding, etc.
    246 * \return Pointer to newly-allocated block, NULL if out of memory.
    247 *
    248 * \sa SDL_SIMDAlignment
    249 * \sa SDL_SIMDFree
    250 */
    251extern DECLSPEC void * SDLCALL SDL_SIMDAlloc(const size_t len);
    252
    253/**
    254 * \brief Deallocate memory obtained from SDL_SIMDAlloc
    255 *
    256 * It is not valid to use this function on a pointer from anything but
    257 *  SDL_SIMDAlloc(). It can't be used on pointers from malloc, realloc,
    258 *  SDL_malloc, memalign, new[], etc.
    259 *
    260 * However, SDL_SIMDFree(NULL) is a legal no-op.
    261 *
    262 * \sa SDL_SIMDAlloc
    263 */
    264extern DECLSPEC void SDLCALL SDL_SIMDFree(void *ptr);
    265
    266/* vi: set ts=4 sw=4 expandtab: */
    267/* Ends C function definitions when using C++ */
    268#ifdef __cplusplus
    269}
    270#endif
    271#include "close_code.h"
    272
    273#endif /* SDL_cpuinfo_h_ */
    274
    275/* vi: set ts=4 sw=4 expandtab: */