tests/tcg/s390x/lae.c

   1 /*
   2  * Test the LOAD ADDRESS EXTENDED instruction.
   3  *
   4  * SPDX-License-Identifier: GPL-2.0-or-later
   5  */
   6 #include <assert.h>
   7 #include <stdlib.h>
   8
   9 int main(void)
  10 {
  11     unsigned long long ar = -1, b2 = 100000, r, x2 = 500;
  12     /*
  13      * Hardcode the register number, since clang does not allow using %rN in
  14      * place of %aN.
  15      */
  16     register unsigned long long r2 __asm__("2");
  17     int tmp;
  18
  19     asm("ear %[tmp],%%a2\n"
  20         "lae %%r2,42(%[x2],%[b2])\n"
  21         "ear %[ar],%%a2\n"
  22         "sar %%a2,%[tmp]"
  23         : [tmp] "=&r" (tmp), "=&r" (r2), [ar] "+r" (ar)
  24         : [b2] "r" (b2), [x2] "r" (x2)
  25         : "memory");
  26     r = r2;
  27     assert(ar == 0xffffffff00000000ULL);
  28     assert(r == 100542);
  29
  30     return EXIT_SUCCESS;
  31 }