Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages


home | help
cpu_capabilities(3)		Allegro	manual		   cpu_capabilities(3)

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

       #include	<allegro.h>

       extern int cpu_capabilities;

       Contains	CPU flags indicating what features are available on  the  cur-
       rent 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
	  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()).

       check_cpu(3), cpu_vendor(3), cpu_family(3), cpu_model(3), cpu_capabili-
       ties(3),	allegro_init(3)

Allegro				 version 4.4.3		   cpu_capabilities(3)


Want to link to this manual page? Use this URL:

home | help