float.h

msp 的开发实例程序

/*                      - FLOAT.H -

   The ANSI floating point limits.

   $Revision: 38615 $

   Copyright 1986 - 1999 IAR Systems. All rights reserved.
*/

#ifndef _FLOAT_INCLUDED

#ifndef _SYSTEM_BUILD
  #pragma system_include
#endif

#include "sysmac.h"

#define FLT_RADIX       2
#define FLT_ROUNDS      1

#define FLT_MANT_DIG    24
#define FLT_EPSILON     1.192092896e-07
#define FLT_DIG         6                       /* Digits of precision */
#define FLT_MIN_EXP     -125
#define FLT_MIN         1.175494351e-38         /* Min positive value */
#define FLT_MIN_10_EXP  -37                     /* Min decimal exponent */
#define FLT_MAX_EXP     128
#define FLT_MAX         3.402823466e+38         /* Max value */
#define FLT_MAX_10_EXP  38                      /* Max decimal exponent */

#if __FLOAT_SIZE__ == __DOUBLE_SIZE__
#define DBL_MANT_DIG    FLT_MANT_DIG
#define DBL_EPSILON     FLT_EPSILON
#define DBL_DIG         FLT_DIG
#define DBL_MIN_EXP     FLT_MIN_EXP
#define DBL_MIN         FLT_MIN
#define DBL_MIN_10_EXP  FLT_MIN_10_EXP 
#define DBL_MAX_EXP     FLT_MAX_EXP
#define DBL_MAX         FLT_MAX
#define DBL_MAX_10_EXP  FLT_MAX_10_EXP
#else
#define DBL_MANT_DIG    53
#define DBL_EPSILON     2.2204460492503131e-016
#define DBL_DIG         15                      /* Digits of precision */
#define DBL_MIN_EXP     -1021
#define DBL_MIN         2.2250738585072014e-308 /* Min positive value */
#define DBL_MIN_10_EXP  -307                    /* Min decimal exponent */
#define DBL_MAX_EXP     1024
#define DBL_MAX         1.7976931348623158e+308 /* Max value */
#define DBL_MAX_10_EXP  308                     /* Max decimal exponent */
#endif

#if __DOUBLE_SIZE__ == __LONG_DOUBLE_SIZE__  /* Must be */
#define LDBL_MANT_DIG   DBL_MANT_DIG
#define LDBL_EPSILON    DBL_EPSILON
#define LDBL_DIG        DBL_DIG
#define LDBL_MIN_EXP    DBL_MIN_EXP
#define LDBL_MIN        DBL_MIN
#define LDBL_MIN_10_EXP DBL_MIN_10_EXP 
#define LDBL_MAX_EXP    DBL_MAX_EXP
#define LDBL_MAX        DBL_MAX
#define LDBL_MAX_10_EXP DBL_MAX_10_EXP
#endif

#define _FLOAT_INCLUDED

#endif