SDL  2.0
SDL_cpuinfo.h File Reference
#include "SDL_stdinc.h"
#include <immintrin.h>
#include "begin_code.h"
#include "close_code.h"
+ Include dependency graph for SDL_cpuinfo.h:
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Macros

#define SDL_CACHELINE_SIZE   128
 

Functions

int SDL_GetCPUCount (void)
 
int SDL_GetCPUCacheLineSize (void)
 
SDL_bool SDL_HasRDTSC (void)
 
SDL_bool SDL_HasAltiVec (void)
 
SDL_bool SDL_HasMMX (void)
 
SDL_bool SDL_Has3DNow (void)
 
SDL_bool SDL_HasSSE (void)
 
SDL_bool SDL_HasSSE2 (void)
 
SDL_bool SDL_HasSSE3 (void)
 
SDL_bool SDL_HasSSE41 (void)
 
SDL_bool SDL_HasSSE42 (void)
 
SDL_bool SDL_HasAVX (void)
 
SDL_bool SDL_HasAVX2 (void)
 
SDL_bool SDL_HasAVX512F (void)
 
SDL_bool SDL_HasNEON (void)
 
int SDL_GetSystemRAM (void)
 

Detailed Description

CPU feature detection for SDL.

Definition in file SDL_cpuinfo.h.

Macro Definition Documentation

◆ SDL_CACHELINE_SIZE

#define SDL_CACHELINE_SIZE   128

Definition at line 95 of file SDL_cpuinfo.h.

Referenced by SDL_GetCPUCacheLineSize().

Function Documentation

◆ SDL_GetCPUCacheLineSize()

int SDL_GetCPUCacheLineSize ( 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.

Definition at line 573 of file SDL_cpuinfo.c.

References cpuid, d, SDL_CACHELINE_SIZE, SDL_GetCPUType(), SDL_strcmp, and void.

Referenced by SDL_SIMDFree().

574 {
575  const char *cpuType = SDL_GetCPUType();
576  int a, b, c, d;
577  (void) a; (void) b; (void) c; (void) d;
578  if (SDL_strcmp(cpuType, "GenuineIntel") == 0) {
579  cpuid(0x00000001, a, b, c, d);
580  return (((b >> 8) & 0xff) * 8);
581  } else if (SDL_strcmp(cpuType, "AuthenticAMD") == 0) {
582  cpuid(0x80000005, a, b, c, d);
583  return (c & 0xff);
584  } else {
585  /* Just make a guess here... */
586  return SDL_CACHELINE_SIZE;
587  }
588 }
static const char * SDL_GetCPUType(void)
Definition: SDL_cpuinfo.c:462
SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char const char SDL_SCANF_FORMAT_STRING const char return SDL_ThreadFunction const char void return Uint32 return Uint32 SDL_AssertionHandler void SDL_SpinLock SDL_atomic_t int int return SDL_atomic_t return void void void return void return int return SDL_AudioSpec SDL_AudioSpec return int int return return int SDL_RWops int SDL_AudioSpec Uint8 ** d
#define SDL_CACHELINE_SIZE
Definition: SDL_cpuinfo.h:95
const GLubyte * c
#define cpuid(func, a, b, c, d)
Definition: SDL_cpuinfo.c:245
SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char const char SDL_SCANF_FORMAT_STRING const char return SDL_ThreadFunction const char void return Uint32 return Uint32 void
#define SDL_strcmp
GLboolean GLboolean GLboolean GLboolean a
GLboolean GLboolean GLboolean b

◆ SDL_GetCPUCount()

int SDL_GetCPUCount ( void  )

This function returns the number of CPU cores available.

Definition at line 423 of file SDL_cpuinfo.c.

References NULL, and SDL_CPUCount.

Referenced by SDL_SIMDFree().

424 {
425  if (!SDL_CPUCount) {
426 #ifndef SDL_CPUINFO_DISABLED
427 #if defined(HAVE_SYSCONF) && defined(_SC_NPROCESSORS_ONLN)
428  if (SDL_CPUCount <= 0) {
429  SDL_CPUCount = (int)sysconf(_SC_NPROCESSORS_ONLN);
430  }
431 #endif
432 #ifdef HAVE_SYSCTLBYNAME
433  if (SDL_CPUCount <= 0) {
434  size_t size = sizeof(SDL_CPUCount);
435  sysctlbyname("hw.ncpu", &SDL_CPUCount, &size, NULL, 0);
436  }
437 #endif
438 #ifdef __WIN32__
439  if (SDL_CPUCount <= 0) {
440  SYSTEM_INFO info;
441  GetSystemInfo(&info);
442  SDL_CPUCount = info.dwNumberOfProcessors;
443  }
444 #endif
445 #ifdef __OS2__
446  if (SDL_CPUCount <= 0) {
447  DosQuerySysInfo(QSV_NUMPROCESSORS, QSV_NUMPROCESSORS,
448  &SDL_CPUCount, sizeof(SDL_CPUCount) );
449  }
450 #endif
451 #endif
452  /* There has to be at least 1, right? :) */
453  if (SDL_CPUCount <= 0) {
454  SDL_CPUCount = 1;
455  }
456  }
457  return SDL_CPUCount;
458 }
GLsizeiptr size
#define NULL
Definition: begin_code.h:164
static int SDL_CPUCount
Definition: SDL_cpuinfo.c:420

◆ SDL_GetSystemRAM()

int SDL_GetSystemRAM ( void  )

This function returns the amount of RAM configured in the system, in MB.

Definition at line 737 of file SDL_cpuinfo.c.

References NULL, and SDL_SystemRAM.

Referenced by SDL_SIMDFree().

738 {
739  if (!SDL_SystemRAM) {
740 #ifndef SDL_CPUINFO_DISABLED
741 #if defined(HAVE_SYSCONF) && defined(_SC_PHYS_PAGES) && defined(_SC_PAGESIZE)
742  if (SDL_SystemRAM <= 0) {
743  SDL_SystemRAM = (int)((Sint64)sysconf(_SC_PHYS_PAGES) * sysconf(_SC_PAGESIZE) / (1024*1024));
744  }
745 #endif
746 #ifdef HAVE_SYSCTLBYNAME
747  if (SDL_SystemRAM <= 0) {
748 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__NetBSD__)
749 #ifdef HW_REALMEM
750  int mib[2] = {CTL_HW, HW_REALMEM};
751 #else
752  /* might only report up to 2 GiB */
753  int mib[2] = {CTL_HW, HW_PHYSMEM};
754 #endif /* HW_REALMEM */
755 #else
756  int mib[2] = {CTL_HW, HW_MEMSIZE};
757 #endif /* __FreeBSD__ || __FreeBSD_kernel__ */
758  Uint64 memsize = 0;
759  size_t len = sizeof(memsize);
760 
761  if (sysctl(mib, 2, &memsize, &len, NULL, 0) == 0) {
762  SDL_SystemRAM = (int)(memsize / (1024*1024));
763  }
764  }
765 #endif
766 #ifdef __WIN32__
767  if (SDL_SystemRAM <= 0) {
768  MEMORYSTATUSEX stat;
769  stat.dwLength = sizeof(stat);
770  if (GlobalMemoryStatusEx(&stat)) {
771  SDL_SystemRAM = (int)(stat.ullTotalPhys / (1024 * 1024));
772  }
773  }
774 #endif
775 #ifdef __OS2__
776  if (SDL_SystemRAM <= 0) {
777  Uint32 sysram = 0;
778  DosQuerySysInfo(QSV_TOTPHYSMEM, QSV_TOTPHYSMEM, &sysram, 4);
779  SDL_SystemRAM = (int) (sysram / 0x100000U);
780  }
781 #endif
782 #endif
783  }
784  return SDL_SystemRAM;
785 }
static int SDL_SystemRAM
Definition: SDL_cpuinfo.c:734
uint64_t Uint64
Definition: SDL_stdinc.h:216
GLenum GLsizei len
#define NULL
Definition: begin_code.h:164
uint32_t Uint32
Definition: SDL_stdinc.h:203
int64_t Sint64
Definition: SDL_stdinc.h:210

◆ SDL_Has3DNow()

SDL_bool SDL_Has3DNow ( void  )

This function returns true if the CPU has 3DNow! features.

Definition at line 675 of file SDL_cpuinfo.c.

References CPU_FEATURE_AVAILABLE, and CPU_HAS_3DNOW.

Referenced by SDL_SIMDFree().

676 {
678 }
#define CPU_FEATURE_AVAILABLE(f)
Definition: SDL_cpuinfo.c:655
#define CPU_HAS_3DNOW
Definition: SDL_cpuinfo.c:84

◆ SDL_HasAltiVec()

SDL_bool SDL_HasAltiVec ( void  )

This function returns true if the CPU has AltiVec features.

Definition at line 663 of file SDL_cpuinfo.c.

References CPU_FEATURE_AVAILABLE, and CPU_HAS_ALTIVEC.

Referenced by SDL_SIMDFree().

664 {
666 }
#define CPU_HAS_ALTIVEC
Definition: SDL_cpuinfo.c:82
#define CPU_FEATURE_AVAILABLE(f)
Definition: SDL_cpuinfo.c:655

◆ SDL_HasAVX()

SDL_bool SDL_HasAVX ( void  )

This function returns true if the CPU has AVX features.

Definition at line 711 of file SDL_cpuinfo.c.

References CPU_FEATURE_AVAILABLE, and CPU_HAS_AVX.

Referenced by SDL_SIMDFree().

712 {
714 }
#define CPU_HAS_AVX
Definition: SDL_cpuinfo.c:90
#define CPU_FEATURE_AVAILABLE(f)
Definition: SDL_cpuinfo.c:655

◆ SDL_HasAVX2()

SDL_bool SDL_HasAVX2 ( void  )

This function returns true if the CPU has AVX2 features.

Definition at line 717 of file SDL_cpuinfo.c.

References CPU_FEATURE_AVAILABLE, and CPU_HAS_AVX2.

Referenced by SDL_SIMDFree().

718 {
720 }
#define CPU_FEATURE_AVAILABLE(f)
Definition: SDL_cpuinfo.c:655
#define CPU_HAS_AVX2
Definition: SDL_cpuinfo.c:91

◆ SDL_HasAVX512F()

SDL_bool SDL_HasAVX512F ( void  )

This function returns true if the CPU has AVX-512F (foundation) features.

Definition at line 723 of file SDL_cpuinfo.c.

References CPU_FEATURE_AVAILABLE, and CPU_HAS_AVX512F.

Referenced by SDL_SIMDFree().

724 {
726 }
#define CPU_HAS_AVX512F
Definition: SDL_cpuinfo.c:93
#define CPU_FEATURE_AVAILABLE(f)
Definition: SDL_cpuinfo.c:655

◆ SDL_HasMMX()

SDL_bool SDL_HasMMX ( void  )

This function returns true if the CPU has MMX features.

Definition at line 669 of file SDL_cpuinfo.c.

References CPU_FEATURE_AVAILABLE, and CPU_HAS_MMX.

Referenced by SDL_SIMDFree().

670 {
672 }
#define CPU_FEATURE_AVAILABLE(f)
Definition: SDL_cpuinfo.c:655
#define CPU_HAS_MMX
Definition: SDL_cpuinfo.c:83

◆ SDL_HasNEON()

SDL_bool SDL_HasNEON ( void  )

This function returns true if the CPU has NEON (ARM SIMD) features.

Definition at line 729 of file SDL_cpuinfo.c.

References CPU_FEATURE_AVAILABLE, and CPU_HAS_NEON.

Referenced by SDL_SIMDFree().

730 {
732 }
#define CPU_FEATURE_AVAILABLE(f)
Definition: SDL_cpuinfo.c:655
#define CPU_HAS_NEON
Definition: SDL_cpuinfo.c:92

◆ SDL_HasRDTSC()

SDL_bool SDL_HasRDTSC ( void  )

This function returns true if the CPU has the RDTSC instruction.

Definition at line 657 of file SDL_cpuinfo.c.

References CPU_FEATURE_AVAILABLE, and CPU_HAS_RDTSC.

Referenced by SDL_SIMDFree().

658 {
660 }
#define CPU_HAS_RDTSC
Definition: SDL_cpuinfo.c:81
#define CPU_FEATURE_AVAILABLE(f)
Definition: SDL_cpuinfo.c:655

◆ SDL_HasSSE()

SDL_bool SDL_HasSSE ( void  )

This function returns true if the CPU has SSE features.

Definition at line 681 of file SDL_cpuinfo.c.

References CPU_FEATURE_AVAILABLE, and CPU_HAS_SSE.

Referenced by SDL_SIMDFree().

682 {
684 }
#define CPU_FEATURE_AVAILABLE(f)
Definition: SDL_cpuinfo.c:655
#define CPU_HAS_SSE
Definition: SDL_cpuinfo.c:85

◆ SDL_HasSSE2()

SDL_bool SDL_HasSSE2 ( void  )

This function returns true if the CPU has SSE2 features.

Definition at line 687 of file SDL_cpuinfo.c.

References CPU_FEATURE_AVAILABLE, and CPU_HAS_SSE2.

Referenced by SDL_SIMDFree().

688 {
690 }
#define CPU_HAS_SSE2
Definition: SDL_cpuinfo.c:86
#define CPU_FEATURE_AVAILABLE(f)
Definition: SDL_cpuinfo.c:655

◆ SDL_HasSSE3()

SDL_bool SDL_HasSSE3 ( void  )

This function returns true if the CPU has SSE3 features.

Definition at line 693 of file SDL_cpuinfo.c.

References CPU_FEATURE_AVAILABLE, and CPU_HAS_SSE3.

Referenced by SDL_SIMDFree().

694 {
696 }
#define CPU_HAS_SSE3
Definition: SDL_cpuinfo.c:87
#define CPU_FEATURE_AVAILABLE(f)
Definition: SDL_cpuinfo.c:655

◆ SDL_HasSSE41()

SDL_bool SDL_HasSSE41 ( void  )

This function returns true if the CPU has SSE4.1 features.

Definition at line 699 of file SDL_cpuinfo.c.

References CPU_FEATURE_AVAILABLE, and CPU_HAS_SSE41.

Referenced by SDL_SIMDFree().

700 {
702 }
#define CPU_HAS_SSE41
Definition: SDL_cpuinfo.c:88
#define CPU_FEATURE_AVAILABLE(f)
Definition: SDL_cpuinfo.c:655

◆ SDL_HasSSE42()

SDL_bool SDL_HasSSE42 ( void  )

This function returns true if the CPU has SSE4.2 features.

Definition at line 705 of file SDL_cpuinfo.c.

References CPU_FEATURE_AVAILABLE, and CPU_HAS_SSE42.

Referenced by SDL_SIMDFree().

706 {
708 }
#define CPU_FEATURE_AVAILABLE(f)
Definition: SDL_cpuinfo.c:655
#define CPU_HAS_SSE42
Definition: SDL_cpuinfo.c:89