gcc/testsuite/g++.dg/charset/asm2.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-*-* } }
   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 #if __cplusplus <= 201402L
  14   register
  15 #endif
  16   unsigned long int __d0, __d1, __d2;
  17   if (__dest < __src)
  18     __asm__ __volatile__
  19       ("cld\n\t"
  20        "rep\n\t"
  21        "movsb"
  22        : "=&c" (__d0), "=&S" (__d1), "=&D" (__d2)
  23        : "0" (__n), "1" (__src), "2" (__dest)
  24        : "memory");
  25   else
  26     __asm__ __volatile__
  27       ("std\n\t"
  28        "rep\n\t"
  29        "movsb\n\t"
  30        "cld"
  31        : "=&c" (__d0), "=&S" (__d1), "=&D" (__d2)
  32        : "0" (__n), "1" (__n - 1 + (const char *) __src),
  33          "2" (__n - 1 + (char *) __dest)
  34        : "memory");
  35   return __dest;
  36 }