1#include "io.h" 2 3int main(void) 4{ 5 long long rt, rs; 6 long long res; 7 rt = 0x1234567887654321; 8 rs = 0xabcd1234abcd8765; 9 10 res = 0x1234567887654321; 11 __asm 12 ("prependw %0, %1, 0x0\n\t" 13 : "=r"(rt) 14 : "r"(rs) 15 ); 16 17 if (rt != res) { 18 printf("prependw error\n"); 19 return -1; 20 } 21 22 rt = 0x1234567887654321; 23 rs = 0xabcd1234abcd8765; 24 25 res = 0x5123456788765432; 26 __asm 27 ("prependw %0, %1, 0x4\n\t" 28 : "=r"(rt) 29 : "r"(rs) 30 ); 31 32 if (rt != res) { 33 printf("prependw error\n"); 34 return -1; 35 } 36 return 0; 37} 38