MISRA 2004 Rule 12.7: Bitwise operator xor (^) used in logical expressions or with signed types

Used to allow '^' as xor in logical expresisons, e.g., "sign = ((_x < 0) ^ (y < 0)) ? -1 : 1;".

  EWL_C/src/arith.c Line: 249
  EWL_C/src/arith.c Line: 273
  EWL_C/src/arith.c Line: 296
  EWL_C/src/sun_math/Single_precision/e_fmodf.c Line: 49