sim/testsuite/sim/bfin/link.s

   1 # Blackfin testcase for link/unlink instructions
   2 # mach: bfin
   3
   4         .include "testutils.inc"
   5
   6         start
   7
   8         /* give FP/RETS known/different values */
   9         R7.H = 0xdead;
  10         R7.L = 0x1234;
  11         RETS = R7;
  12         R6 = R7;
  13         R6 += 0x23;
  14         FP = R6;
  15
  16         /* SP should have moved by -8 bytes (to push FP/RETS) */
  17         R0 = SP;
  18         LINK 0;
  19         R1 = SP;
  20         R1 += 8;
  21         CC = R0 == R1;
  22         IF !CC JUMP 1f;
  23
  24         /* FP should now have the same value as SP */
  25         R1 = SP;
  26         R2 = FP;
  27         CC = R1 == R2;
  28         IF !CC JUMP 1f;
  29
  30         /* make sure FP/RETS on the stack have our known values */
  31         R1 = [SP];
  32         CC = R1 == R6;
  33         IF !CC JUMP 1f;
  34
  35         R1 = [SP + 4];
  36         CC = R1 == R7;
  37         IF !CC JUMP 1f;
  38
  39         /* UNLINK should:
  40          *      assign SP to current FP
  41          *      adjust SP by -8 bytes
  42          *      restore RETS/FP from the stack
  43          */
  44         R4 = 0;
  45         RETS = R4;
  46         R0 = SP;
  47         UNLINK;
  48
  49         /* Check new SP */
  50         R1 = SP;
  51         R1 += -0x8;
  52         CC = R1 == R0;
  53         IF !CC JUMP 1f;
  54
  55         /* Check restored RETS */
  56         R1 = RETS;
  57         CC = R1 == R7;
  58         IF !CC JUMP 1f;
  59
  60         /* Check restored FP */
  61         R1 = FP;
  62         CC = R1 == R6;
  63         IF !CC JUMP 1f;
  64
  65         pass
  66 1:
  67         fail