test_addc.c (723B)
1 #include <stdio.h> 2 3 int main(void) 4 { 5 int a, b, c; 6 int result; 7 8 b = 0x01; 9 c = 0xffffffff; 10 result = 0; 11 __asm 12 ("l.add r1, r1, r0\n\t" /* clear carry */ 13 "l.addc %0, %1, %2\n\t" 14 : "=r"(a) 15 : "r"(b), "r"(c) 16 ); 17 if (a != result) { 18 printf("first addc error\n"); 19 return -1; 20 } 21 22 b = 0x01; 23 c = 0xffffffff; 24 result = 0x80000001; 25 __asm 26 ("l.add r1, r1, r0\n\t" /* clear carry */ 27 "l.addc %0, %1, %2\n\t" 28 "l.movhi %2, 0x7fff\n\t" 29 "l.ori %2, %2, 0xffff\n\t" 30 "l.addc %0, %1, %2\n\t" 31 : "=r"(a) 32 : "r"(b), "r"(c) 33 ); 34 if (a != result) { 35 printf("addc error\n"); 36 return -1; 37 } 38 39 return 0; 40 }