Eina_Cpu_Group(3)

NAME
Eina_Cpu_Group - Cpu

 - Cpu and architecture related helpers.

SYNOPSIS

  Macros
#define MIN(x, y) (((x) > (y)) ? (y) : (x))
Returns the minimum of the two parameters.
#define MAX(x, y) (((x) > (y)) ? (x) : (y))
Returns the maximum of the two parameters.

  Typedefs
typedef enum _Eina_Cpu_Features Eina_Cpu_Features
Enumerates different hardware architectures.

  Enumerations
enum _Eina_Cpu_Features { EINA_CPU_MMX = 0x00000001, EINA_CPU_SSE = 0x00000002, EINA_CPU_SSE2 = 0x00000004, EINA_CPU_SSE3 = 0x00000008, EINA_CPU_ALTIVEC = 0x00000010, EINA_CPU_VIS = 0x00000020, EINA_CPU_NEON = 0x00000040, EINA_CPU_SSSE3 = 0x00000080, EINA_CPU_SSE41 = 0x00000100, EINA_CPU_SSE42 = 0x00000200, EINA_CPU_SVE = 0x00000400 }

  Functions
EINA_API Eina_Cpu_Features eina_cpu_features_get (void)
Cpu features accessor.
EINA_API int eina_cpu_count (void)
Gets the current number of processors.
EINA_API int eina_cpu_page_size (void)
Gets the current virtual page size.
static unsigned short eina_swap16 (unsigned short x)
Reverses the byte order of a 16-bit (destination) register.
static unsigned int eina_swap32 (unsigned int x)
Reverses the byte order of a 32-bit (destination) register.
static unsigned long long eina_swap64 (unsigned long long x)
Reverses the byte order of a 64-bit (destination) register.
static unsigned short eina_htons (unsigned short host)
static unsigned int eina_htonl (unsigned int host)
static unsigned long long eina_htonll (unsigned long long host)
static unsigned short eina_ntohs (unsigned short net)
static unsigned int eina_ntohl (unsigned int net)
static unsigned long long eina_ntohll (unsigned long long net)

  Variables
EINA_API Eina_Cpu_Features eina_cpu_features
Global hardware architecture handler.

Detailed Description

Cpu and architecture related helpers.

Macro Definition Documentation

  #define MIN(x, y) (((x) > (y)) ? (y) : (x))

Returns the minimum of the two parameters.

Warning
    Beware of side effects, since the returned parameter is evaluated twice.

  #define MAX(x, y) (((x) > (y)) ? (x) : (y))

Returns the maximum of the two parameters.

Warning
    Beware of side effects, since the returned parameter is evaluated twice.

Enumeration Type Documentation

  enum _Eina_Cpu_Features

Enumerator

EINA_CPU_MMX
    Multimedia Extensions (Intel)

EINA_CPU_SSE
    Streaming SIMD Extensions (Intel)

EINA_CPU_SSE2
    Streaming SIMD Extensions 2 (Intel)

EINA_CPU_SSE3
    Streaming SIMD Extensions 3 (Intel)

EINA_CPU_ALTIVEC
    Single-precision floating point and integer SIMD (PowerPC)

EINA_CPU_VIS
    Visual Instruction Set (Spark)

EINA_CPU_NEON
    Advanced SIMD Extension (ARM)

EINA_CPU_SSSE3
    Supplemental Streaming SIMD Extension 3 (Intel)

EINA_CPU_SSE41
    Streaming SIMD Extension 4.1 (Intel)

EINA_CPU_SSE42
    Streaming SIMD Extension 4.2 (Intel)

EINA_CPU_SVE
    Scalable Vector Extension (ARM)

Function Documentation

  EINA_API Eina_Cpu_Features eina_cpu_features_get (void)

Cpu features accessor.

Returns
    the current cpu features

References eina_cpu_features.

  EINA_API int eina_cpu_count (void)

Gets the current number of processors.

Returns
    The number of processors that are online, that is available when the function is called.

Referenced by ecore_thread_max_reset(), and ecore_thread_max_set().

  EINA_API int eina_cpu_page_size (void)

Gets the current virtual page size.

Returns
    The fixed length that represents the smallest unit of data for memory allocation performed by the operating system on behalf of the program, and for transfers between the main memory and any other auxiliary store.

Referenced by eina_mmap_safety_enabled_set().

  static unsigned short eina_swap16 (unsigned short x) [inline], [static]

Reverses the byte order of a 16-bit (destination) register.

Parameters
    x The binary word to swap

Returns
    A byte order swapped 16-bit integer.

On big endian systems, the number is converted to little endian byte order. On little endian systems, the number is converted to big endian byte order.

  static unsigned int eina_swap32 (unsigned int x) [inline], [static]

Reverses the byte order of a 32-bit (destination) register.

Parameters
    x The binary word to swap

Returns
    A byte order swapped 32-bit integer.

On big endian systems, the number is converted to little endian byte order. On little endian systems, the number is converted to big endian byte order.

  static unsigned long long eina_swap64 (unsigned long long x) [inline], [static]

Reverses the byte order of a 64-bit (destination) register.

Parameters
    x The binary word to swap

Returns
    A byte order swapped 64-bit integer.

On big endian systems, the number is converted to little endian byte order. On little endian systems, the number is converted to big endian byte order.

Variable Documentation

  EINA_API Eina_Cpu_Features eina_cpu_features [extern]

Global hardware architecture handler.

Returns
    the current cpu features

Referenced by eina_cpu_features_get().

Author

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