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Annotation of os232sdk/c386/include/float.h, revision 1.1

1.1     ! root        1: /***
        !             2: *float.h - constants for floating point values
        !             3: *
        !             4: *      Copyright (c) 1985-1990, Microsoft Corporation.  All rights reserved.
        !             5: *
        !             6: *Purpose:
        !             7: *      This file contains defines for a number of implementation dependent
        !             8: *      values which are commonly used by sophisticated numerical (floating
        !             9: *      point) programs.
        !            10: *      [ANSI]
        !            11: *
        !            12: ****/
        !            13: 
        !            14: 
        !            15: #define DBL_DIG        15                      /* # of decimal digits of precision */
        !            16: #define DBL_EPSILON    2.2204460492503131e-016 /* smallest such that 1.0+DBL_EPSILON != 1.0 */
        !            17: #define DBL_MANT_DIG   53                      /* # of bits in mantissa */
        !            18: #define DBL_MAX        1.7976931348623158e+308 /* max value */
        !            19: #define DBL_MAX_10_EXP 308                     /* max decimal exponent */
        !            20: #define DBL_MAX_EXP    1024                    /* max binary exponent */
        !            21: #define DBL_MIN        2.2250738585072014e-308 /* min positive value */
        !            22: #define DBL_MIN_10_EXP (-307)                  /* min decimal exponent */
        !            23: #define DBL_MIN_EXP    (-1021)                 /* min binary exponent */
        !            24: #define DBL_RADIX      2                       /* exponent radix */
        !            25: #define DBL_ROUNDS     1                       /* addition rounding: near */
        !            26: 
        !            27: #define FLT_DIG        6                       /* # of decimal digits of precision */
        !            28: #define FLT_EPSILON    1.192092896e-07F        /* smallest such that 1.0+FLT_EPSILON != 1.0 */
        !            29: #define FLT_GUARD      0
        !            30: #define FLT_MANT_DIG   24                      /* # of bits in mantissa */
        !            31: #define FLT_MAX        3.402823466e+38F        /* max value */
        !            32: #define FLT_MAX_10_EXP 38                      /* max decimal exponent */
        !            33: #define FLT_MAX_EXP    128                     /* max binary exponent */
        !            34: #define FLT_MIN        1.175494351e-38F        /* min positive value */
        !            35: #define FLT_MIN_10_EXP (-37)                   /* min decimal exponent */
        !            36: #define FLT_MIN_EXP    (-125)                  /* min binary exponent */
        !            37: #define FLT_NORMALIZE  0
        !            38: #define FLT_RADIX      2                       /* exponent radix */
        !            39: #define FLT_ROUNDS     1                       /* addition rounding: near */
        !            40: 
        !            41: #define LDBL_DIG       DBL_DIG                 /* # of decimal digits of precision */
        !            42: #define LDBL_EPSILON   DBL_EPSILON             /* smallest such that 1.0+LDBL_EPSILON != 1.0 */
        !            43: #define LDBL_MANT_DIG  DBL_MANT_DIG            /* # of bits in mantissa */
        !            44: #define LDBL_MAX       DBL_MAX                 /* max value */
        !            45: #define LDBL_MAX_10_EXP DBL_MAX_10_EXP         /* max decimal exponent */
        !            46: #define LDBL_MAX_EXP   DBL_MAX_EXP             /* max binary exponent */
        !            47: #define LDBL_MIN       DBL_MIN                 /* min positive value */
        !            48: #define LDBL_MIN_10_EXP DBL_MIN_10_EXP         /* min decimal exponent */
        !            49: #define LDBL_MIN_EXP   DBL_MIN_EXP             /* min binary exponent */
        !            50: #define LDBL_RADIX     DBL_RADIX               /* exponent radix */
        !            51: #define LDBL_ROUNDS    DBL_ROUNDS              /* addition rounding: near */
        !            52: 
        !            53: 
        !            54: 
        !            55: /*
        !            56:  *  8087/80287 math control information
        !            57:  */
        !            58: 
        !            59: 
        !            60: /* User Control Word Mask and bit definitions.
        !            61:  * These definitions match the 8087/80287
        !            62:  */
        !            63: 
        !            64: #define MCW_EM         0x003f          /* interrupt Exception Masks */
        !            65: #define EM_INVALID     0x0001          /*   invalid */
        !            66: #define EM_DENORMAL    0x0002          /*   denormal */
        !            67: #define EM_ZERODIVIDE  0x0004          /*   zero divide */
        !            68: #define EM_OVERFLOW    0x0008          /*   overflow */
        !            69: #define EM_UNDERFLOW   0x0010          /*   underflow */
        !            70: #define EM_INEXACT     0x0020          /*   inexact (precision) */
        !            71: 
        !            72: #define MCW_IC         0x1000          /* Infinity Control */
        !            73: #define IC_AFFINE      0x1000          /*   affine */
        !            74: #define IC_PROJECTIVE  0x0000          /*   projective */
        !            75: 
        !            76: #define MCW_RC         0x0c00          /* Rounding Control */
        !            77: #define RC_CHOP        0x0c00          /*   chop */
        !            78: #define RC_UP          0x0800          /*   up */
        !            79: #define RC_DOWN        0x0400          /*   down */
        !            80: #define RC_NEAR        0x0000          /*   near */
        !            81: 
        !            82: #define MCW_PC         0x0300          /* Precision Control */
        !            83: #define PC_24          0x0000          /*    24 bits */
        !            84: #define PC_53          0x0200          /*    53 bits */
        !            85: #define PC_64          0x0300          /*    64 bits */
        !            86: 
        !            87: 
        !            88: /* initial Control Word value */
        !            89: 
        !            90: #define CW_DEFAULT ( IC_AFFINE + RC_NEAR + PC_64 + EM_DENORMAL + EM_UNDERFLOW + EM_INEXACT )
        !            91: 
        !            92: 
        !            93: /* user Status Word bit definitions */
        !            94: 
        !            95: #define SW_INVALID     0x0001  /* invalid */
        !            96: #define SW_DENORMAL    0x0002  /* denormal */
        !            97: #define SW_ZERODIVIDE  0x0004  /* zero divide */
        !            98: #define SW_OVERFLOW    0x0008  /* overflow */
        !            99: #define SW_UNDERFLOW   0x0010  /* underflow */
        !           100: #define SW_INEXACT     0x0020  /* inexact (precision) */
        !           101: 
        !           102: 
        !           103: /* invalid subconditions (SW_INVALID also set) */
        !           104: 
        !           105: #define SW_UNEMULATED          0x0040  /* unemulated instruction */
        !           106: #define SW_SQRTNEG             0x0080  /* square root of a neg number */
        !           107: #define SW_STACKOVERFLOW       0x0200  /* FP stack overflow */
        !           108: #define SW_STACKUNDERFLOW      0x0400  /* FP stack underflow */
        !           109: 
        !           110: 
        !           111: /*  Floating point error signals and return codes */
        !           112: 
        !           113: #define FPE_INVALID            0x81
        !           114: #define FPE_DENORMAL           0x82
        !           115: #define FPE_ZERODIVIDE         0x83
        !           116: #define FPE_OVERFLOW           0x84
        !           117: #define FPE_UNDERFLOW          0x85
        !           118: #define FPE_INEXACT            0x86
        !           119: 
        !           120: #define FPE_UNEMULATED         0x87
        !           121: #define FPE_SQRTNEG            0x88
        !           122: #define FPE_STACKOVERFLOW      0x8a
        !           123: #define FPE_STACKUNDERFLOW     0x8b
        !           124: 
        !           125: #define FPE_EXPLICITGEN        0x8c    /* raise( SIGFPE ); */
        !           126: 
        !           127: /* function prototypes */
        !           128: 
        !           129: unsigned int _cdecl _clear87(void);
        !           130: unsigned int _cdecl _control87(unsigned int,unsigned int);
        !           131: void _cdecl _fpreset(void);
        !           132: unsigned int _cdecl _status87(void);

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