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