movstest.c

汇编代码示例

/* movstest.c - An example of instructions with only input values */
#include <stdio.h>

int main()
{
   char input[30] = {"This is a test message.\n"};
   char output[30];
   int length = 25;

   asm volatile ("cld\n\t"
       "rep movsb"
      :
      : "S"(input), "D"(output), "c"(length));

   printf("%s", output);
   return 0;
}