none/tests/amd64/clc.c

   1
   2 #include <stdio.h>
   3
   4 typedef unsigned long long int ULong;
   5
   6 ULong do_clc ( void )
   7 {
   8   ULong res;
   9   __asm__ __volatile__(
  10      "pushq $0x8d5\n\t" /* OSZACP */
  11      "popfq\n\t"
  12      "clc\n\t"
  13      "pushfq\n\t"
  14      "popq %0"
  15      : "=r"(res)
  16      :
  17      : "memory", "cc"
  18      );
  19   return res;
  20 }
  21
  22 ULong do_stc ( void )
  23 {
  24   ULong res;
  25   __asm__ __volatile__(
  26      "pushq $0x0\n\t"
  27      "popfq\n\t"
  28      "stc\n\t"
  29      "pushfq\n\t"
  30      "popq %0"
  31      : "=r"(res)
  32      :
  33      : "memory", "cc"
  34      );
  35   return res;
  36 }
  37
  38 ULong do_cmc ( void )
  39 {
  40   ULong res;
  41   __asm__ __volatile__(
  42      "pushq $0x0\n\t"
  43      "popfq\n\t"
  44      "stc\n\t"
  45      "cmc\n\t"
  46      "pushfq\n\t"
  47      "popq %0"
  48      : "=r"(res)
  49      :
  50      : "memory", "cc"
  51      );
  52   return res;
  53 }
  54
  55 int main ( void )
  56 {
  57   printf("clc: 0x%016llx\n", 0x8d5 & do_clc());
  58   printf("stc: 0x%016llx\n", 0x8d5 & do_stc());
  59   printf("cmc: 0x%016llx\n", 0x8d5 & do_cmc());
  60   return 0;
  61 }