gcc/testsuite/gcc.dg/charset/asm3.c

   1 /* Test for complex asm statements. Make sure it compiles
   2    then test for some of the asm statements not being translated.  */
   3 /* { dg-do compile { target { { i?86-*-* x86_64-*-* } && ilp32 } } }
   4    { dg-require-iconv "IBM1047" }
   5    { dg-final { scan-assembler "std" } }
   6    { dg-final { scan-assembler "cld" } }
   7    { dg-final { scan-assembler "rep" } }
   8    { dg-final { scan-assembler "movsb" } } */
   9 #define size_t int
  10 void *
  11 memmove (void *__dest, __const void *__src, size_t __n)
  12 {
  13   register unsigned long int __d0, __d1, __d2;
  14   if (__dest < __src)
  15     __asm__ __volatile__
  16       ("cld\n\t"
  17        "rep\n\t"
  18        "movsb"
  19        : "=&c" (__d0), "=&S" (__d1), "=&D" (__d2)
  20        : "0" (__n), "1" (__src), "2" (__dest)
  21        : "memory");
  22   else
  23     __asm__ __volatile__
  24       ("std\n\t"
  25        "rep\n\t"
  26        "movsb\n\t"
  27        "cld"
  28        : "=&c" (__d0), "=&S" (__d1), "=&D" (__d2)
  29        : "0" (__n), "1" (__n - 1 + (const char *) __src),
  30          "2" (__n - 1 + (char *) __dest)
  31        : "memory");
  32   return __dest;
  33 }