cmake/TestInlineASM_gcc_x86.c

   1 int
   2 main()
   3 {
   4   unsigned int _eax,_ebx,_ecx,_edx;
   5   unsigned int level = 0;
   6
   7   /* Test gcc inline asm for x86 */
   8 #if defined (__x86_64__) || defined (_M_X64)
   9     __asm__("push %%rbx       \n\t"
  10             "cpuid            \n\t"
  11             "movl %%ebx, %1   \n\t"
  12             "pop %%rbx        \n\t"
  13             : "=a"(_eax), "=r"(_ebx), "=c"(_ecx), "=d"(_edx) : "0"(level));
  14 #else
  15     __asm__("push %%ebx       \n\t"
  16             "cpuid            \n\t"
  17             "movl %%ebx, %1   \n\t"
  18             "pop %%ebx        \n\t"
  19             : "=a"(_eax), "=r"(_ebx), "=c"(_ecx), "=d"(_edx) : "0"(level));
  20 #endif
  21
  22   return 0;
  23 }