#define OP(a,b,op) ((a)op(b))

#define MKFUNC_a_op_b(type, opname, op) void type##_##opname##_##type(const void *a, const void *b, void *out) \
{\
  type tmp =  OP(*(type*)a,*(type*)b,op);\
  memcpy(out,(void*)(&tmp),sizeof(type));\
}\

MKFUNC_a_op_b(char,plus,+)
MKFUNC_a_op_b(char,minus,-)
MKFUNC_a_op_b(char,div,/)
MKFUNC_a_op_b(char,mod,%)

MKFUNC_a_op_b(float,plus,+)
MKFUNC_a_op_b(float,minus,-)
MKFUNC_a_op_b(float,div,/)
MKFUNC_a_op_b(float,mod,%)