53 lines
1.3 KiB
C
53 lines
1.3 KiB
C
/* _LDtest function -- IEEE 754 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
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_CRTIMP2 short _LDtest(long double *px)
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{ /* categorize *px */
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return (_Dtest((double *)px));
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}
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#elif _LONG_DOUBLE_HAS_HIDDEN_BIT
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_CRTIMP2 short _LDtest(long double *px)
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{ /* categorize *px -- SPARC */
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unsigned short *ps = (unsigned short *)px;
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short xchar = ps[_L0] & _LMASK;
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if (xchar == _LMAX)
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return (ps[_L1] != 0 || ps[_L2] != 0 || ps[_L3] != 0
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|| ps[_L4] != 0 || ps[_L5] != 0 || ps[_L6] != 0
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|| ps[_L7] != 0 ? NAN : INF);
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else if (0 < xchar || ps[_L1] || ps[_L2] || ps[_L3]
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|| ps[_L4] || ps[_L5] || ps[_L6] || ps[_L7])
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return (FINITE);
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else
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return (0);
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}
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#else /* _DLONG && !_LONG_DOUBLE_HAS_HIDDEN_BIT */
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_CRTIMP2 short _LDtest(long double *px)
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{ /* categorize *px */
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unsigned short *ps = (unsigned short *)px;
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short xchar = ps[_L0] & _LMASK;
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if (xchar == _LMAX)
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return ((ps[_L1] & 0x7fff) != 0 || ps[_L2] != 0
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|| ps[_L3] != 0 || ps[_L4] != 0 ? NAN : INF);
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else if (0 < xchar || ps[_L1] != 0 || ps[_L2] || ps[_L3]
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|| ps[_L4])
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return (FINITE);
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else
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return (0);
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}
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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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*/
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