1cpu_capabilities(3)             Allegro manual             cpu_capabilities(3)
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NAME

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

10       #include <allegro.h>
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13       extern int cpu_capabilities;
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DESCRIPTION

16       Contains CPU flags indicating what features are available on  the  cur‐
17       rent CPU. The flags can be any combination of these:
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19          CPU_ID       - Indicates that the "cpuid" instruction is
20                         available. If this is set, then all Allegro CPU
21                         variables are 100% reliable, otherwise there
22                         may be some mistakes.
23          CPU_FPU      - An FPU is available.
24          CPU_IA64     - Running on Intel 64 bit CPU
25          CPU_AMD64    - Running on AMD 64 bit CPU
26          CPU_MMX      - Intel MMX  instruction set is available.
27          CPU_MMXPLUS  - Intel MMX+ instruction set is available.
28          CPU_SSE      - Intel SSE  instruction set is available.
29          CPU_SSE2     - Intel SSE2 instruction set is available.
30          CPU_SSE3     - Intel SSE3 instruction set is available.
31          CPU_3DNOW    - AMD 3DNow! instruction set is available.
32          CPU_ENH3DNOW - AMD Enhanced 3DNow! instruction set is
33                         available.
34          CPU_CMOV     - Pentium Pro "cmov" instruction is available.
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36       You  can check for multiple features by OR-ing the flags together.  For
37       example, to check if the CPU has an FPU and MMX instructions available,
38       you'd do:
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40          if ((cpu_capabilities & (CPU_FPU | CPU_MMX)) ==
41              (CPU_FPU | CPU_MMX)) {
42             printf("CPU has both an FPU and MMX instructions!\n");
43          }
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45       You  can read this variable after you have called check_cpu() (which is
46       automatically called by allegro_init()).
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SEE ALSO

52       check_cpu(3), cpu_vendor(3), cpu_family(3), cpu_model(3), cpu_capabili‐
53       ties(3), allegro_init(3)
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57Allegro                          version 4.2.3             cpu_capabilities(3)
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