FLT_EVAL_METHOD
#define FLT_EVAL_METHOD 0
#define FLT_EVAL_METHOD 0
#define FLT_EVAL_METHOD 0
#define FLT_EVAL_METHOD 0
#define FLT_EVAL_METHOD 0 /* no promotions */
#define FLT_EVAL_METHOD (-1) /* i387 semantics are...interesting */