tests/tcg/s390x/exrl-trt.c

   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]),%[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] "a" (&op1),
  31           [op1_len] "a" (5),
  32           [op2] "Q" (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 }