![[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 [WindowsNT SDKs] / mstools / h|
Return to float.h CVS log | Up to [WindowsNT SDKs] / mstools / h |
1.1 root 1: /***
2: *float.h - constants for floating point values
3: *
1.1.1.4 ! root 4: * Copyright (c) 1985-1993, Microsoft Corporation. All rights reserved.
1.1 root 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:
1.1.1.3 root 21: /*
22: * Conditional macro definition for function calling type and variable type
23: * qualifiers.
24: */
25: #if ( (_MSC_VER >= 800) && (_M_IX86 >= 300) )
26:
27: /*
28: * Definitions for MS C8-32 (386/486) compiler
29: */
30: #define _CRTAPI1 __cdecl
31: #define _CRTAPI2 __cdecl
32:
33: #else
34:
35: /*
36: * Other compilers (e.g., MIPS)
37: */
38: #define _CRTAPI1
39: #define _CRTAPI2
40:
1.1.1.2 root 41: #endif
1.1 root 42:
1.1.1.3 root 43:
1.1 root 44: #define DBL_DIG 15 /* # of decimal digits of precision */
45: #define DBL_EPSILON 2.2204460492503131e-016 /* smallest such that 1.0+DBL_EPSILON != 1.0 */
46: #define DBL_MANT_DIG 53 /* # of bits in mantissa */
47: #define DBL_MAX 1.7976931348623158e+308 /* max value */
48: #define DBL_MAX_10_EXP 308 /* max decimal exponent */
49: #define DBL_MAX_EXP 1024 /* max binary exponent */
50: #define DBL_MIN 2.2250738585072014e-308 /* min positive value */
51: #define DBL_MIN_10_EXP (-307) /* min decimal exponent */
52: #define DBL_MIN_EXP (-1021) /* min binary exponent */
53: #define _DBL_RADIX 2 /* exponent radix */
54: #define _DBL_ROUNDS 1 /* addition rounding: near */
55:
56: #define FLT_DIG 6 /* # of decimal digits of precision */
57: #define FLT_EPSILON 1.192092896e-07F /* smallest such that 1.0+FLT_EPSILON != 1.0 */
58: #define FLT_GUARD 0
59: #define FLT_MANT_DIG 24 /* # of bits in mantissa */
60: #define FLT_MAX 3.402823466e+38F /* max value */
61: #define FLT_MAX_10_EXP 38 /* max decimal exponent */
62: #define FLT_MAX_EXP 128 /* max binary exponent */
63: #define FLT_MIN 1.175494351e-38F /* min positive value */
64: #define FLT_MIN_10_EXP (-37) /* min decimal exponent */
65: #define FLT_MIN_EXP (-125) /* min binary exponent */
66: #define FLT_NORMALIZE 0
67: #define FLT_RADIX 2 /* exponent radix */
68: #define FLT_ROUNDS 1 /* addition rounding: near */
69:
70: #define LDBL_DIG DBL_DIG /* # of decimal digits of precision */
71: #define LDBL_EPSILON DBL_EPSILON /* smallest such that 1.0+LDBL_EPSILON != 1.0 */
72: #define LDBL_MANT_DIG DBL_MANT_DIG /* # of bits in mantissa */
73: #define LDBL_MAX DBL_MAX /* max value */
74: #define LDBL_MAX_10_EXP DBL_MAX_10_EXP /* max decimal exponent */
75: #define LDBL_MAX_EXP DBL_MAX_EXP /* max binary exponent */
76: #define LDBL_MIN DBL_MIN /* min positive value */
77: #define LDBL_MIN_10_EXP DBL_MIN_10_EXP /* min decimal exponent */
78: #define LDBL_MIN_EXP DBL_MIN_EXP /* min binary exponent */
79: #define _LDBL_RADIX DBL_RADIX /* exponent radix */
80: #define _LDBL_ROUNDS DBL_ROUNDS /* addition rounding: near */
81:
82:
83:
1.1.1.2 root 84:
85: /* function prototypes */
86:
1.1.1.3 root 87: unsigned int _CRTAPI1 _clearfp(void);
88: unsigned int _CRTAPI1 _controlfp(unsigned int,unsigned int);
89: unsigned int _CRTAPI1 _statusfp(void);
90: void _CRTAPI1 _fpreset(void);
1.1.1.2 root 91:
92: #define _clear87 _clearfp
93: #define _status87 _statusfp
94:
1.1 root 95: /*
1.1.1.2 root 96: * Abstract User Control Word Mask and bit definitions
1.1 root 97: */
98:
1.1.1.2 root 99: #define _MCW_EM 0x0008001f /* interrupt Exception Masks */
100: #define _EM_INEXACT 0x00000001 /* inexact (precision) */
101: #define _EM_UNDERFLOW 0x00000002 /* underflow */
102: #define _EM_OVERFLOW 0x00000004 /* overflow */
103: #define _EM_ZERODIVIDE 0x00000008 /* zero divide */
104: #define _EM_INVALID 0x00000010 /* invalid */
105:
106: #define _MCW_RC 0x00000300 /* Rounding Control */
107: #define _RC_NEAR 0x00000000 /* near */
108: #define _RC_DOWN 0x00000100 /* down */
109: #define _RC_UP 0x00000200 /* up */
110: #define _RC_CHOP 0x00000300 /* chop */
1.1 root 111:
1.1.1.2 root 112: /*
113: * Abstract User Status Word bit definitions
1.1 root 114: */
115:
1.1.1.2 root 116: #define _SW_INEXACT 0x00000001 /* inexact (precision) */
117: #define _SW_UNDERFLOW 0x00000002 /* underflow */
118: #define _SW_OVERFLOW 0x00000004 /* overflow */
119: #define _SW_ZERODIVIDE 0x00000008 /* zero divide */
120: #define _SW_INVALID 0x00000010 /* invalid */
1.1 root 121:
122:
1.1.1.2 root 123: /*
124: * i386 specific definitions
125: */
1.1 root 126:
1.1.1.2 root 127: #define _MCW_PC 0x00030000 /* Precision Control */
128: #define _PC_64 0x00000000 /* 64 bits */
129: #define _PC_53 0x00010000 /* 53 bits */
130: #define _PC_24 0x00020000 /* 24 bits */
131:
132: #define _MCW_IC 0x00040000 /* Infinity Control */
133: #define _IC_AFFINE 0x00040000 /* affine */
134: #define _IC_PROJECTIVE 0x00000000 /* projective */
1.1 root 135:
1.1.1.2 root 136: #define _EM_DENORMAL 0x00080000 /* denormal exception mask (_control87 only) */
1.1 root 137:
1.1.1.2 root 138: #define _SW_DENORMAL 0x00080000 /* denormal status bit */
1.1 root 139:
140:
1.1.1.3 root 141: unsigned int _CRTAPI1 _control87(unsigned int,unsigned int);
1.1 root 142:
143:
1.1.1.2 root 144: /*
145: * MIPS R4000 specific definitions
146: */
147:
148: #define _MCW_DN 0x01000000 /* Denormal Control (R4000) */
149: #define _DN_FLUSH 0x01000000 /* flush to zero */
150: #define _DN_SAVE 0x00000000 /* save */
1.1 root 151:
152:
1.1.1.2 root 153: /* initial Control Word value */
154:
1.1.1.3 root 155: #ifdef _M_IX86
1.1.1.2 root 156:
157: #define _CW_DEFAULT ( _RC_NEAR + _PC_64 + _EM_INVALID + _EM_ZERODIVIDE + _EM_OVERFLOW + _EM_UNDERFLOW + _EM_INEXACT )
158:
1.1.1.4 ! root 159: #elif defined(_M_MRX000) || defined(_MIPS_)
! 160:
! 161: #define _CW_DEFAULT ( _RC_NEAR + _DN_FLUSH + _EM_INVALID + _EM_ZERODIVIDE + _EM_OVERFLOW + _EM_UNDERFLOW + _EM_INEXACT )
! 162:
! 163: #elif defined (_ALPHA_)
1.1.1.2 root 164:
165: #define _CW_DEFAULT ( _RC_NEAR + _DN_FLUSH + _EM_INVALID + _EM_ZERODIVIDE + _EM_OVERFLOW + _EM_UNDERFLOW + _EM_INEXACT )
166:
167: #endif
168:
1.1 root 169: /* Global variable holding floating point error code */
170:
171: #ifdef _MT
1.1.1.3 root 172: extern int * _CRTAPI1 __fpecode(void);
1.1 root 173: #define _fpecode (*__fpecode())
174: #else
175: extern int _fpecode;
176: #endif
177:
1.1.1.2 root 178: /* invalid subconditions (_SW_INVALID also set) */
179:
180: #define _SW_UNEMULATED 0x0040 /* unemulated instruction */
181: #define _SW_SQRTNEG 0x0080 /* square root of a neg number */
182: #define _SW_STACKOVERFLOW 0x0200 /* FP stack overflow */
183: #define _SW_STACKUNDERFLOW 0x0400 /* FP stack underflow */
1.1 root 184:
185: /* Floating point error signals and return codes */
186:
187: #define _FPE_INVALID 0x81
188: #define _FPE_DENORMAL 0x82
189: #define _FPE_ZERODIVIDE 0x83
190: #define _FPE_OVERFLOW 0x84
191: #define _FPE_UNDERFLOW 0x85
192: #define _FPE_INEXACT 0x86
193:
194: #define _FPE_UNEMULATED 0x87
195: #define _FPE_SQRTNEG 0x88
196: #define _FPE_STACKOVERFLOW 0x8a
197: #define _FPE_STACKUNDERFLOW 0x8b
198:
199: #define _FPE_EXPLICITGEN 0x8c /* raise( SIGFPE ); */
200:
201:
1.1.1.2 root 202: /* IEEE recommended functions */
203:
1.1.1.3 root 204: double _CRTAPI1 _copysign (double, double);
205: double _CRTAPI1 _chgsign (double);
206: double _CRTAPI1 _scalb(double, long);
207: double _CRTAPI1 _logb(double);
208: double _CRTAPI1 _nextafter(double, double);
209: int _CRTAPI1 _finite(double);
210: int _CRTAPI1 _isnan(double);
211: int _CRTAPI1 _fpclass(double);
1.1.1.2 root 212:
213: #define _FPCLASS_SNAN 0x0001 /* signaling NaN */
214: #define _FPCLASS_QNAN 0x0002 /* quiet NaN */
215: #define _FPCLASS_NINF 0x0004 /* negative infinity */
216: #define _FPCLASS_NN 0x0008 /* negative normal */
217: #define _FPCLASS_ND 0x0010 /* negative denormal */
218: #define _FPCLASS_NZ 0x0020 /* -0 */
219: #define _FPCLASS_PZ 0x0040 /* +0 */
220: #define _FPCLASS_PD 0x0080 /* positive denormal */
221: #define _FPCLASS_PN 0x0100 /* positive normal */
222: #define _FPCLASS_PINF 0x0200 /* positive infinity */
1.1 root 223:
224:
225: #if !__STDC__
226: /* Non-ANSI names for compatibility */
227:
1.1.1.2 root 228: #define clear87 _clear87
229: #define status87 _status87
230: #define control87 _control87
231: #define fpreset _fpreset
232:
1.1 root 233: #define DBL_RADIX _DBL_RADIX
234: #define DBL_ROUNDS _DBL_ROUNDS
235:
236: #define LDBL_RADIX _LDBL_RADIX
237: #define LDBL_ROUNDS _LDBL_ROUNDS
238:
239: #define MCW_EM _MCW_EM
240: #define EM_INVALID _EM_INVALID
241: #define EM_DENORMAL _EM_DENORMAL
242: #define EM_ZERODIVIDE _EM_ZERODIVIDE
243: #define EM_OVERFLOW _EM_OVERFLOW
244: #define EM_UNDERFLOW _EM_UNDERFLOW
245: #define EM_INEXACT _EM_INEXACT
246:
247: #define MCW_IC _MCW_IC
248: #define IC_AFFINE _IC_AFFINE
249: #define IC_PROJECTIVE _IC_PROJECTIVE
250:
251: #define MCW_RC _MCW_RC
252: #define RC_CHOP _RC_CHOP
253: #define RC_UP _RC_UP
254: #define RC_DOWN _RC_DOWN
255: #define RC_NEAR _RC_NEAR
256:
257: #define MCW_PC _MCW_PC
258: #define PC_24 _PC_24
259: #define PC_53 _PC_53
260: #define PC_64 _PC_64
261:
262: #define CW_DEFAULT _CW_DEFAULT
263:
264: #define SW_INVALID _SW_INVALID
265: #define SW_DENORMAL _SW_DENORMAL
266: #define SW_ZERODIVIDE _SW_ZERODIVIDE
267: #define SW_OVERFLOW _SW_OVERFLOW
268: #define SW_UNDERFLOW _SW_UNDERFLOW
269: #define SW_INEXACT _SW_INEXACT
270:
271: #define SW_UNEMULATED _SW_UNEMULATED
272: #define SW_SQRTNEG _SW_SQRTNEG
273: #define SW_STACKOVERFLOW _SW_STACKOVERFLOW
274: #define SW_STACKUNDERFLOW _SW_STACKUNDERFLOW
275:
276: #define FPE_INVALID _FPE_INVALID
277: #define FPE_DENORMAL _FPE_DENORMAL
278: #define FPE_ZERODIVIDE _FPE_ZERODIVIDE
279: #define FPE_OVERFLOW _FPE_OVERFLOW
280: #define FPE_UNDERFLOW _FPE_UNDERFLOW
281: #define FPE_INEXACT _FPE_INEXACT
282:
283: #define FPE_UNEMULATED _FPE_UNEMULATED
284: #define FPE_SQRTNEG _FPE_SQRTNEG
285: #define FPE_STACKOVERFLOW _FPE_STACKOVERFLOW
286: #define FPE_STACKUNDERFLOW _FPE_STACKUNDERFLOW
287:
288: #define FPE_EXPLICITGEN _FPE_EXPLICITGEN
289:
290:
1.1.1.2 root 291: #endif /* __STDC__ */
1.1 root 292:
293: #ifdef __cplusplus
294: }
295: #endif
296:
297: #define _INC_FLOAT
298: #endif /* _INC_FLOAT */
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.