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Annotation of os2sdk/include/float.h, revision 1.1

1.1     ! root        1: /***
        !             2: *float.h - constants for floating point values
        !             3: *
        !             4: *   Copyright (c) 1985-1987, 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: #ifndef NO_EXT_KEYS /* extensions enabled */
        !            15:     #define _CDECL  cdecl
        !            16: #else /* extensions not enabled */
        !            17:     #define _CDECL
        !            18: #endif /* NO_EXT_KEYS */
        !            19: 
        !            20: 
        !            21: #define DBL_DIG         15                      /* # of decimal digits of precision */
        !            22: #define DBL_EPSILON     2.2204460492503131e-016 /* smallest such that 1.0+DBL_EPSILON != 1.0 */
        !            23: #define DBL_MANT_DIG    53                      /* # of bits in mantissa */
        !            24: #define DBL_MAX         1.7976931348623158e+308 /* max value */
        !            25: #define DBL_MAX_10_EXP  308                     /* max decimal exponent */
        !            26: #define DBL_MAX_EXP     1024                    /* max binary exponent */
        !            27: #define DBL_MIN         2.2250738585072014e-308 /* min positive value */
        !            28: #define DBL_MIN_10_EXP  -307                    /* min decimal exponent
        !            29: #define DBL_MIN_EXP     -1021                   /* min binary exponent */
        !            30: #define DBL_RADIX       2                       /* exponent radix */
        !            31: #define DBL_ROUNDS      0                       /* addition rounding: chops */
        !            32: 
        !            33: #define FLT_DIG         6                       /* # of decimal digits of precision */
        !            34: #define FLT_EPSILON     1.192092896e-07         /* smallest such that 1.0+FLT_EPSILON != 1.0 */
        !            35: #define FLT_GUARD       0
        !            36: #define FLT_MANT_DIG    24                      /* # of bits in mantissa */
        !            37: #define FLT_MAX         3.402823466e+38         /* max value */
        !            38: #define FLT_MAX_10_EXP  38                      /* max decimal exponent */
        !            39: #define FLT_MAX_EXP     128                     /* max binary exponent */
        !            40: #define FLT_MIN         1.175494351e-38         /* min positive value */
        !            41: #define FLT_MIN_10_EXP  -37                     /* min decimal exponent */
        !            42: #define FLT_MIN_EXP     -125                    /* min binary exponent */
        !            43: #define FLT_NORMALIZE   0
        !            44: #define FLT_RADIX       2                       /* exponent radix */
        !            45: #define FLT_ROUNDS      0                       /* addition rounding: chops */
        !            46: 
        !            47: #define LDBL_DIG        DBL_DIG                 /* # of decimal digits of precision */
        !            48: #define LDBL_EPSILON    DBL_EPSILON             /* smallest such that 1.0+LDBL_EPSILON != 1.0 */
        !            49: #define LDBL_MANT_DIG   DBL_MANT_DIG            /* # of bits in mantissa */
        !            50: #define LDBL_MAX        DBL_MAX                 /* max value */
        !            51: #define LDBL_MAX_10_EXP DBL_MAX_10_EXP          /* max decimal exponent */
        !            52: #define LDBL_MAX_EXP    DBL_MAX_EXP             /* max binary exponent */
        !            53: #define LDBL_MIN        DBL_MIN                 /* min positive value */
        !            54: #define LDBL_MIN_10_EXP DBL_MIN_10_EXP          /* min deimal exponent
        !            55: #define LDBL_MIN_EXP    DBL_MIN_EXP             /* min binary exponent */
        !            56: #define LDBL_RADIX      DBL_RADIX               /* exponent radix */
        !            57: #define LDBL_ROUNDS     DBL_ROUNDS              /* addition rounding: chops */
        !            58: 
        !            59: 
        !            60: /*
        !            61:  *  8087/80287 math control information
        !            62:  */
        !            63: 
        !            64: 
        !            65: /* User Control Word Mask and bit definitions.
        !            66:  * These definitions match the 8087/80287
        !            67:  */
        !            68: 
        !            69: #define     MCW_EM          0x003f      /* interrupt Exception Masks */
        !            70: #define     EM_INVALID      0x0001      /*   invalid */
        !            71: #define     EM_DENORMAL     0x0002      /*   denormal */
        !            72: #define     EM_ZERODIVIDE   0x0004      /*   zero divide */
        !            73: #define     EM_OVERFLOW     0x0008      /*   overflow */
        !            74: #define     EM_UNDERFLOW    0x0010      /*   underflow */
        !            75: #define     EM_INEXACT      0x0020      /*   inexact (precision) */
        !            76: 
        !            77: #define     MCW_IC          0x1000      /* Infinity Control */
        !            78: #define     IC_AFFINE       0x1000      /*   affine */
        !            79: #define     IC_PROJECTIVE   0x0000      /*   projective */
        !            80: 
        !            81: #define     MCW_RC          0x0c00      /* Rounding Control */
        !            82: #define     RC_CHOP         0x0c00      /*   chop */
        !            83: #define     RC_UP           0x0800      /*   up */
        !            84: #define     RC_DOWN         0x0400      /*   down */
        !            85: #define     RC_NEAR         0x0000      /*   near */
        !            86: 
        !            87: #define     MCW_PC          0x0300      /* Precision Control */
        !            88: #define     PC_24           0x0000      /*    24 bits */
        !            89: #define     PC_53           0x0200      /*    53 bits */
        !            90: #define     PC_64           0x0300      /*    64 bits */
        !            91: 
        !            92: 
        !            93: /* initial Control Word value */
        !            94: 
        !            95: #define CW_DEFAULT ( IC_AFFINE + RC_NEAR + PC_64 + EM_DENORMAL + EM_UNDERFLOW + EM_INEXACT )
        !            96: 
        !            97: 
        !            98: /* user Status Word bit definitions */
        !            99: 
        !           100: #define SW_INVALID          0x0001      /*   invalid */
        !           101: #define SW_DENORMAL         0x0002      /*   denormal */
        !           102: #define SW_ZERODIVIDE       0x0004      /*   zero divide */
        !           103: #define SW_OVERFLOW         0x0008      /*   overflow */
        !           104: #define SW_UNDERFLOW        0x0010      /*   underflow */
        !           105: #define SW_INEXACT          0x0020      /*   inexact (precision) */
        !           106: 
        !           107: 
        !           108: /* invalid subconditions (SW_INVALID also set) */
        !           109: 
        !           110: #define SW_UNEMULATED       0x0040      /* unemulated instruction */
        !           111: #define SW_SQRTNEG          0x0080      /* square root of a neg number */
        !           112: #define SW_STACKOVERFLOW    0x0200      /* FP stack overflow */
        !           113: #define SW_STACKUNDERFLOW   0x0400      /* FP stack underflow */
        !           114: 
        !           115: 
        !           116: /*  Floating point error signals and return codes */
        !           117: 
        !           118: #define FPE_INVALID         0x81
        !           119: #define FPE_DENORMAL        0x82
        !           120: #define FPE_ZERODIVIDE      0x83
        !           121: #define FPE_OVERFLOW        0x84
        !           122: #define FPE_UNDERFLOW       0x85
        !           123: #define FPE_INEXACT         0x86
        !           124: 
        !           125: #define FPE_UNEMULATED      0x87
        !           126: #define FPE_SQRTNEG         0x88
        !           127: #define FPE_STACKOVERFLOW   0x8a
        !           128: #define FPE_STACKUNDERFLOW  0x8b
        !           129: 
        !           130: #define FPE_EXPLICITGEN     0x8c    /* raise( SIGFPE ); */
        !           131: 
        !           132: /* function prototypes */
        !           133: 
        !           134: unsigned int _CDECL _clear87(void);
        !           135: unsigned int _CDECL _control87(unsigned int,unsigned int);
        !           136: void _CDECL _fpreset(void);
        !           137: unsigned int _CDECL _status87(void);

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