cpu_capabilities - Contains the capability flags of the CPU. Allegro game programming library.

       Contains  CPU  flags  indicating  what  features  are  available on the current CPU. The flags can be any
       combination of these:

          CPU_ID       - Indicates that the "cpuid" instruction is
                         available. If this is set, then all Allegro CPU
                         variables are 100% reliable, otherwise there
                         may be some mistakes.
          CPU_FPU      - An FPU is available.
          CPU_IA64     - Running on Intel 64 bit CPU
          CPU_AMD64    - Running on AMD 64 bit CPU
          CPU_MMX      - Intel MMX  instruction set is available.
          CPU_MMXPLUS  - Intel MMX+ instruction set is available.
          CPU_SSE      - Intel SSE  instruction set is available.
          CPU_SSE2     - Intel SSE2 instruction set is available.
          CPU_SSE3     - Intel SSE3 instruction set is available.
          CPU_3DNOW    - AMD 3DNow! instruction set is available.
          CPU_ENH3DNOW - AMD Enhanced 3DNow! instruction set is
                         available.
          CPU_CMOV     - Pentium Pro "cmov" instruction is available.

       You can check for multiple features by OR-ing the flags together.  For example, to check if the  CPU  has
       an FPU and MMX instructions available, you'd do:

          if ((cpu_capabilities & (CPU_FPU | CPU_MMX)) ==
              (CPU_FPU | CPU_MMX)) {
             printf("CPU has both an FPU and MMX instructions!\n");
          }

       You  can  read  this  variable  after  you  have  called  check_cpu()  (which  is automatically called by
       allegro_init()).

       cpu_capabilities - Contains the capability flags of the CPU. Allegro game programming library.

check_cpu(3alleg4),         cpu_vendor(3alleg4),         cpu_family(3alleg4),         cpu_model(3alleg4),
       cpu_capabilities(3alleg4), allegro_init(3alleg4)

Allegro                                           version 4.4.3                        cpu_capabilities(3alleg4)

#include<allegro.h>externintcpu_capabilities;