#ifdef USE_LONG_DOUBLE
# error Long double not supported.
#elif ! defined USE_FLOAT
-# include "isnand.h"
+# include "isnand-nolibm.h"
# define ISNAN isnand
# define FUNCTION "round"
# define DOUBLE_UINT uint64_t
# define NUM_HIGHBITS 13
# define NUM_LOWBITS 4
#else /* defined USE_FLOAT */
-# include "isnanf.h"
+# include "isnanf-nolibm.h"
# define ISNAN isnanf
# define FUNCTION "roundf"
# define DOUBLE_UINT uint32_t