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1.1 root 1: /***
2: *float.h - constants for floating point values
3: *
4: * Copyright (c) 1985-1991, 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 _INC_FLOAT
15:
16: #ifdef __cplusplus
17: extern "C" {
18: #endif
19:
20:
21: #if (_MSC_VER <= 600)
22: #define __cdecl _cdecl
23: #endif
24:
25: #define DBL_DIG 15 /* # of decimal digits of precision */
26: #define DBL_EPSILON 2.2204460492503131e-016 /* smallest such that 1.0+DBL_EPSILON != 1.0 */
27: #define DBL_MANT_DIG 53 /* # of bits in mantissa */
28: #define DBL_MAX 1.7976931348623158e+308 /* max value */
29: #define DBL_MAX_10_EXP 308 /* max decimal exponent */
30: #define DBL_MAX_EXP 1024 /* max binary exponent */
31: #define DBL_MIN 2.2250738585072014e-308 /* min positive value */
32: #define DBL_MIN_10_EXP (-307) /* min decimal exponent */
33: #define DBL_MIN_EXP (-1021) /* min binary exponent */
34: #define _DBL_RADIX 2 /* exponent radix */
35: #define _DBL_ROUNDS 1 /* addition rounding: near */
36:
37: #define FLT_DIG 6 /* # of decimal digits of precision */
38: #define FLT_EPSILON 1.192092896e-07F /* smallest such that 1.0+FLT_EPSILON != 1.0 */
39: #define FLT_GUARD 0
40: #define FLT_MANT_DIG 24 /* # of bits in mantissa */
41: #define FLT_MAX 3.402823466e+38F /* max value */
42: #define FLT_MAX_10_EXP 38 /* max decimal exponent */
43: #define FLT_MAX_EXP 128 /* max binary exponent */
44: #define FLT_MIN 1.175494351e-38F /* min positive value */
45: #define FLT_MIN_10_EXP (-37) /* min decimal exponent */
46: #define FLT_MIN_EXP (-125) /* min binary exponent */
47: #define FLT_NORMALIZE 0
48: #define FLT_RADIX 2 /* exponent radix */
49: #define FLT_ROUNDS 1 /* addition rounding: near */
50:
51: #define LDBL_DIG DBL_DIG /* # of decimal digits of precision */
52: #define LDBL_EPSILON DBL_EPSILON /* smallest such that 1.0+LDBL_EPSILON != 1.0 */
53: #define LDBL_MANT_DIG DBL_MANT_DIG /* # of bits in mantissa */
54: #define LDBL_MAX DBL_MAX /* max value */
55: #define LDBL_MAX_10_EXP DBL_MAX_10_EXP /* max decimal exponent */
56: #define LDBL_MAX_EXP DBL_MAX_EXP /* max binary exponent */
57: #define LDBL_MIN DBL_MIN /* min positive value */
58: #define LDBL_MIN_10_EXP DBL_MIN_10_EXP /* min decimal exponent */
59: #define LDBL_MIN_EXP DBL_MIN_EXP /* min binary exponent */
60: #define _LDBL_RADIX DBL_RADIX /* exponent radix */
61: #define _LDBL_ROUNDS DBL_ROUNDS /* addition rounding: near */
62:
63:
64:
65: /*
66: * 8087/80287 math control information
67: */
68:
69:
70: /* User Control Word Mask and bit definitions.
71: * These definitions match the 8087/80287
72: */
73:
74: #define _MCW_EM 0x003f /* interrupt Exception Masks */
75: #define _EM_INVALID 0x0001 /* invalid */
76: #define _EM_DENORMAL 0x0002 /* denormal */
77: #define _EM_ZERODIVIDE 0x0004 /* zero divide */
78: #define _EM_OVERFLOW 0x0008 /* overflow */
79: #define _EM_UNDERFLOW 0x0010 /* underflow */
80: #define _EM_INEXACT 0x0020 /* inexact (precision) */
81:
82: #define _MCW_IC 0x1000 /* Infinity Control */
83: #define _IC_AFFINE 0x1000 /* affine */
84: #define _IC_PROJECTIVE 0x0000 /* projective */
85:
86: #define _MCW_RC 0x0c00 /* Rounding Control */
87: #define _RC_CHOP 0x0c00 /* chop */
88: #define _RC_UP 0x0800 /* up */
89: #define _RC_DOWN 0x0400 /* down */
90: #define _RC_NEAR 0x0000 /* near */
91:
92: #define _MCW_PC 0x0300 /* Precision Control */
93: #define _PC_24 0x0000 /* 24 bits */
94: #define _PC_53 0x0200 /* 53 bits */
95: #define _PC_64 0x0300 /* 64 bits */
96:
97:
98: /* initial Control Word value */
99:
100: #define _CW_DEFAULT ( _IC_AFFINE + _RC_NEAR + _PC_64 + _EM_DENORMAL + _EM_UNDERFLOW + _EM_INEXACT )
101:
102:
103: /* user Status Word bit definitions */
104:
105: #define _SW_INVALID 0x0001 /* invalid */
106: #define _SW_DENORMAL 0x0002 /* denormal */
107: #define _SW_ZERODIVIDE 0x0004 /* zero divide */
108: #define _SW_OVERFLOW 0x0008 /* overflow */
109: #define _SW_UNDERFLOW 0x0010 /* underflow */
110: #define _SW_INEXACT 0x0020 /* inexact (precision) */
111:
112:
113: /* invalid subconditions (_SW_INVALID also set) */
114:
115: #define _SW_UNEMULATED 0x0040 /* unemulated instruction */
116: #define _SW_SQRTNEG 0x0080 /* square root of a neg number */
117: #define _SW_STACKOVERFLOW 0x0200 /* FP stack overflow */
118: #define _SW_STACKUNDERFLOW 0x0400 /* FP stack underflow */
119:
120:
121: /* Global variable holding floating point error code */
122:
123: #ifdef _MT
124: extern int * __fpecode(void);
125: #define _fpecode (*__fpecode())
126: #else
127: extern int _fpecode;
128: #endif
129:
130:
131: /* Floating point error signals and return codes */
132:
133: #define _FPE_INVALID 0x81
134: #define _FPE_DENORMAL 0x82
135: #define _FPE_ZERODIVIDE 0x83
136: #define _FPE_OVERFLOW 0x84
137: #define _FPE_UNDERFLOW 0x85
138: #define _FPE_INEXACT 0x86
139:
140: #define _FPE_UNEMULATED 0x87
141: #define _FPE_SQRTNEG 0x88
142: #define _FPE_STACKOVERFLOW 0x8a
143: #define _FPE_STACKUNDERFLOW 0x8b
144:
145: #define _FPE_EXPLICITGEN 0x8c /* raise( SIGFPE ); */
146:
147:
148: /* function prototypes */
149:
150: unsigned int _clear87(void);
151: unsigned int _control87(unsigned int,unsigned int);
152: void _fpreset(void);
153: unsigned int _status87(void);
154:
155: #if !__STDC__
156: /* Non-ANSI names for compatibility */
157:
158: #define DBL_RADIX _DBL_RADIX
159: #define DBL_ROUNDS _DBL_ROUNDS
160:
161: #define LDBL_RADIX _LDBL_RADIX
162: #define LDBL_ROUNDS _LDBL_ROUNDS
163:
164: #define MCW_EM _MCW_EM
165: #define EM_INVALID _EM_INVALID
166: #define EM_DENORMAL _EM_DENORMAL
167: #define EM_ZERODIVIDE _EM_ZERODIVIDE
168: #define EM_OVERFLOW _EM_OVERFLOW
169: #define EM_UNDERFLOW _EM_UNDERFLOW
170: #define EM_INEXACT _EM_INEXACT
171:
172: #define MCW_IC _MCW_IC
173: #define IC_AFFINE _IC_AFFINE
174: #define IC_PROJECTIVE _IC_PROJECTIVE
175:
176: #define MCW_RC _MCW_RC
177: #define RC_CHOP _RC_CHOP
178: #define RC_UP _RC_UP
179: #define RC_DOWN _RC_DOWN
180: #define RC_NEAR _RC_NEAR
181:
182: #define MCW_PC _MCW_PC
183: #define PC_24 _PC_24
184: #define PC_53 _PC_53
185: #define PC_64 _PC_64
186:
187: #define CW_DEFAULT _CW_DEFAULT
188:
189: #define SW_INVALID _SW_INVALID
190: #define SW_DENORMAL _SW_DENORMAL
191: #define SW_ZERODIVIDE _SW_ZERODIVIDE
192: #define SW_OVERFLOW _SW_OVERFLOW
193: #define SW_UNDERFLOW _SW_UNDERFLOW
194: #define SW_INEXACT _SW_INEXACT
195:
196: #define SW_UNEMULATED _SW_UNEMULATED
197: #define SW_SQRTNEG _SW_SQRTNEG
198: #define SW_STACKOVERFLOW _SW_STACKOVERFLOW
199: #define SW_STACKUNDERFLOW _SW_STACKUNDERFLOW
200:
201: #define FPE_INVALID _FPE_INVALID
202: #define FPE_DENORMAL _FPE_DENORMAL
203: #define FPE_ZERODIVIDE _FPE_ZERODIVIDE
204: #define FPE_OVERFLOW _FPE_OVERFLOW
205: #define FPE_UNDERFLOW _FPE_UNDERFLOW
206: #define FPE_INEXACT _FPE_INEXACT
207:
208: #define FPE_UNEMULATED _FPE_UNEMULATED
209: #define FPE_SQRTNEG _FPE_SQRTNEG
210: #define FPE_STACKOVERFLOW _FPE_STACKOVERFLOW
211: #define FPE_STACKUNDERFLOW _FPE_STACKUNDERFLOW
212:
213: #define FPE_EXPLICITGEN _FPE_EXPLICITGEN
214:
215: #endif /* __STDC__ */
216:
217:
218: #ifdef __cplusplus
219: }
220: #endif
221:
222: #define _INC_FLOAT
223: #endif /* _INC_FLOAT */
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