sim/testsuite/bfin/loop_strncpy.s

   1 # Blackfin testcase for loop counter values when jumping out from the last insn
   2 # mach: bfin
   3
   4 .include "testutils.inc"
   5         start
   6
   7         init_r_regs 0;
   8         ASTAT = R0;
   9
  10         loadsym r1, dest;
  11         r0 = r1;
  12         loadsym r1, src;
  13         r2 = 0x10;
  14
  15 _strncpy:
  16         CC = R2 == 0;
  17         if CC JUMP 4f;
  18
  19         P2 = R2 ;       /* size */
  20         P0 = R0 ;       /* dst*/
  21         P1 = R1 ;       /* src*/
  22
  23         LSETUP (1f, 2f) LC0 = P2;
  24 1:
  25         R1 = B [P1++] (Z);
  26         B [P0++] = R1;
  27         CC = R1 == 0;
  28 2:
  29         if CC jump 3f;
  30
  31         fail
  32
  33         /* if src is shorter than n, we need to null pad bytes in dest
  34          * but, we can get here when the last byte is zero, and we don't
  35          * want to copy an extra byte at the end, so we need to check
  36          */
  37 3:
  38         R2 = LC0;
  39         CHECKREG R2, 0x0a;
  40
  41         CC = R2
  42         if ! CC jump 4f;
  43
  44         LSETUP(5f, 5f) LC0;
  45 5:
  46         B [P0++] = R1;
  47
  48 4:
  49         loadsym P1, answer;
  50         P0 = R0;
  51         p2 = 0x20;
  52         LSETUP (6f, 7f) LC0 = P2;
  53 6:
  54         R1 = B [P0++];
  55         R2 = B [P1++];
  56         CC = R1 == R2
  57         IF ! CC JUMP wrong;
  58 7:
  59         NOP;
  60
  61         pass
  62
  63 wrong:
  64         fail
  65
  66         .data
  67 dest:
  68         .db 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F
  69         .db 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F
  70
  71 src:
  72         .db 0x21, 0x22, 0x23, 0x24, 0x25, 0x00, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F, 0x30
  73
  74 answer:
  75         .db 0x21, 0x22, 0x23, 0x24, 0x25, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
  76         .db 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F