![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to float.h CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [OS/2 SDKs] / os2sdk / include|
Return to float.h CVS log | Up to [OS/2 SDKs] / os2sdk / include |
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);
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.