+#include "float+.h"
+
+#ifdef USE_LONG_DOUBLE
+# define FUNC rpl_isnanl
+# define DOUBLE long double
+# define MAX_EXP LDBL_MAX_EXP
+# define MIN_EXP LDBL_MIN_EXP
+# if defined LDBL_EXPBIT0_WORD && defined LDBL_EXPBIT0_BIT
+# define KNOWN_EXPBIT0_LOCATION
+# define EXPBIT0_WORD LDBL_EXPBIT0_WORD
+# define EXPBIT0_BIT LDBL_EXPBIT0_BIT
+# endif
+# define SIZE SIZEOF_LDBL
+# define L_(literal) literal##L
+#elif ! defined USE_FLOAT
+# define FUNC rpl_isnand
+# define DOUBLE double
+# define MAX_EXP DBL_MAX_EXP
+# define MIN_EXP DBL_MIN_EXP
+# if defined DBL_EXPBIT0_WORD && defined DBL_EXPBIT0_BIT
+# define KNOWN_EXPBIT0_LOCATION
+# define EXPBIT0_WORD DBL_EXPBIT0_WORD
+# define EXPBIT0_BIT DBL_EXPBIT0_BIT
+# endif
+# define SIZE SIZEOF_DBL
+# define L_(literal) literal
+#else /* defined USE_FLOAT */
+# define FUNC rpl_isnanf
+# define DOUBLE float
+# define MAX_EXP FLT_MAX_EXP
+# define MIN_EXP FLT_MIN_EXP
+# if defined FLT_EXPBIT0_WORD && defined FLT_EXPBIT0_BIT
+# define KNOWN_EXPBIT0_LOCATION
+# define EXPBIT0_WORD FLT_EXPBIT0_WORD
+# define EXPBIT0_BIT FLT_EXPBIT0_BIT
+# endif
+# define SIZE SIZEOF_FLT
+# define L_(literal) literal##f
+#endif
+
+#define EXP_MASK ((MAX_EXP - MIN_EXP) | 7)