1 #include <stdint.h> 2 #include <unistd.h> 3 4 int main(void) 5 { 6 char op1[] = "hello"; 7 char op2[256]; 8 uint64_t r1 = 0xffffffffffffffffull; 9 uint64_t r2 = 0xffffffffffffffffull; 10 uint64_t cc; 11 int i; 12 13 for (i = 0; i < 256; i++) { 14 if (i == 0) { 15 op2[i] = 0xaa; 16 } else { 17 op2[i] = 0; 18 } 19 } 20 asm volatile( 21 " j 2f\n" 22 "1: trt 0(1,%[op1]),0(%[op2])\n" 23 "2: exrl %[op1_len],1b\n" 24 " lgr %[r1],%%r1\n" 25 " lgr %[r2],%%r2\n" 26 " ipm %[cc]\n" 27 : [r1] "+r" (r1), 28 [r2] "+r" (r2), 29 [cc] "=r" (cc) 30 : [op1] "r" (&op1), 31 [op1_len] "r" (5), 32 [op2] "r" (&op2) 33 : "r1", "r2", "cc"); 34 cc = (cc >> 28) & 3; 35 if (cc != 2) { 36 write(1, "bad cc\n", 7); 37 return 1; 38 } 39 if ((char *)r1 != &op1[5]) { 40 write(1, "bad r1\n", 7); 41 return 1; 42 } 43 if (r2 != 0xffffffffffffffaaull) { 44 write(1, "bad r2\n", 7); 45 return 1; 46 } 47 return 0; 48 } 49