84 lines
2.7 KiB
C
84 lines
2.7 KiB
C
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/* values used by math functions -- IEEE 754 long version */
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#include "wctype.h"
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#include "xmath.h"
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_STD_BEGIN
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#if _DLONG /* long double has unique representation */
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/* macros */
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#define NBITS 64
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#if _D0
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#define INIT(w0, w1) {0, 0, 0, w1, w0}
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#define INIT3(w0, w1, wn) {wn, 0, 0, w1, w0}
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#else
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#define INIT(w0, w1) {w0, w1, 0, 0, 0}
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#define INIT3(w0, w1, wn) {w0, w1, 0, 0, wn}
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#endif
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/* static data */
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_CRTIMP2 const _Dconst _LDenorm = {INIT3(0, 0, 1)};
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_CRTIMP2 const _Dconst _LEps = {INIT(_LBIAS - NBITS - 1, 0x8000)};
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#if _LONG_DOUBLE_HAS_HIDDEN_BIT
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_CRTIMP2 const _Dconst _LInf = {INIT(_LMAX, 0)};
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_CRTIMP2 const _Dconst _LNan = {INIT(_LSIGN | _LMAX, 0x8000)};
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_CRTIMP2 const _Dconst _LSnan = {INIT(_LSIGN | _LMAX, 0)};
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#else
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_CRTIMP2 const _Dconst _LInf = {INIT(_LMAX, 0x8000)};
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_CRTIMP2 const _Dconst _LNan = {INIT(_LSIGN | _LMAX, 0xc000)};
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_CRTIMP2 const _Dconst _LSnan = {INIT(_LSIGN | _LMAX, 0x8000)};
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#endif
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_CRTIMP2 const _Dconst _LRteps = {INIT(_LBIAS - NBITS / 2, 0x8000)};
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_CRTIMP2 const long double _LXbig = (NBITS + 1) * 347L / 1000;
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#if defined(__CENTERLINE__)
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#define _DYNAMIC_INIT_CONST(x) \
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(x._L = *(long double *)(void *)(x._W))
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long double _centerline_long_double_dynamic_init =
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_DYNAMIC_INIT_CONST(_LEps),
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_DYNAMIC_INIT_CONST(_LInf),
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_DYNAMIC_INIT_CONST(_LNan),
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_DYNAMIC_INIT_CONST(_LRteps);
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#endif
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#else /* long double same representation as double */
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/* macros */
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#define NBITS (48 + _DOFF)
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#if _D0
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#define INIT(w0) {0, 0, 0, w0}
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#define INIT2(w0, w1) {w1, 0, 0, w0}
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#else
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#define INIT(w0) {w0, 0, 0, 0}
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#define INIT2(w0, w1) {w0, 0, 0, w1}
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#endif
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/* static data */
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_CRTIMP2 const _Dconst _LDenorm = {INIT2(0, 1)};
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_CRTIMP2 const _Dconst _LEps = {INIT((_DBIAS - NBITS - 1) << _DOFF)};
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_CRTIMP2 const _Dconst _LInf = {INIT(_DMAX << _DOFF)};
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_CRTIMP2 const _Dconst _LNan = {INIT(_DSIGN | (_DMAX << _DOFF)
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| (1 << (_DOFF - 1)))};
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_CRTIMP2 const _Dconst _LRteps = {INIT((_DBIAS - NBITS / 2) << _DOFF)};
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_CRTIMP2 const _Dconst _LSnan = {INIT(_DSIGN | (_DMAX << _DOFF))};
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_CRTIMP2 const long double _LXbig = (NBITS + 1) * 347L / 1000;
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#if defined(__CENTERLINE__)
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#define _DYNAMIC_INIT_CONST(x) \
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(x._D = *(long double *)(void *)(x._W))
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long double _centerline_long_double_dynamic_inits =
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_DYNAMIC_INIT_CONST(_LEps),
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_DYNAMIC_INIT_CONST(_LInf),
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_DYNAMIC_INIT_CONST(_LNan),
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_DYNAMIC_INIT_CONST(_LRteps);
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#endif
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#endif
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_STD_END
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/*
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* Copyright (c) 1994 by P.J. Plauger. ALL RIGHTS RESERVED.
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* Consult your license regarding permissions and restrictions.
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*/
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/*
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941029 pjp: added _STD machinery
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950222 pjp: added signaling NaN, denorm minimum for C++
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950506 pjp: corrected _LDenorm spelling
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951005 pjp: added _DLONG logic
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951115 pjp: corrected _LXbig type
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*/
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