Retrieve MMX and SSE support using the CPUID assembly command.

cpuid.cpp

#include <iostream>

using namespace std;

int main(int argc,char* argv[])
{
  	unsigned int cpeinfo;
	unsigned int cpsse3;
	__asm__(
	  "mov $01,%%eax;"     
	  "cpuid;"
	  "mov %%edx,%0;"  
	  "mov %%ecx,%1"
	  :"=r"(cpeinfo),"=r"(cpsse3)
	  );

	cout << "1 - Instruction set is supported by CPU\n";
	cout << "0 - Instruction set not supported\n"; 
	cout << "--------------------------------\n";
	cout << "MMX:  " << ((cpeinfo >> 23) & 0x1 ) << "\tSSE:  " << ((cpeinfo >> 25) & 0x1 ) << "\tSSE2: " << ((cpeinfo >> 26) & 0x1 ) << "\n"; 
	cout << "SSE3: " << ((cpsse3       ) & 0x1 ); 

}