sdcc/support/regression/tests/bitwise8reg.c

   1 /** Test the 8-bit bitwise operators under register pressure
   2     Meant to trigger use of 16-bit bitwise instructions for 8-bit operations.
   3
   4  */
   5
   6 #include <testfwk.h>
   7
   8 unsigned char c0, c1, c2, c3;
   9
  10 unsigned char and8(void)
  11 {
  12         unsigned char t0, t1, t2, t3, t4, t5;
  13
  14         t0 = c0 + 1;
  15         t1 = c1 + 1;
  16         t2 = c2 + 1;
  17         t3 = c3 + 1;
  18
  19         t4 = t0 & t1;
  20         t5 = t2 & t3;
  21
  22         return(t4 + t5);
  23 }
  24
  25 unsigned char or8(void)
  26 {
  27         unsigned char t0, t1, t2, t3, t4, t5;
  28
  29         t0 = c0 + 1;
  30         t1 = c1 + 1;
  31         t2 = c2 + 1;
  32         t3 = c3 + 1;
  33
  34         t4 = t0 | t1;
  35         t5 = t2 | t3;
  36
  37         return(t4 + t5);
  38 }
  39
  40 void
  41 test8(void)
  42 {
  43         c0 = 2;
  44         c1 = 2;
  45         c2 = 4;
  46         c3 = 4;
  47
  48         ASSERT(and8() == 8);
  49         ASSERT(or8() == 8);
  50 }
  51