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- /*
- * Copyright (c) 1998 The Santa Cruz Operation, Inc.. All Rights Reserved.
- *
- * THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF THE
- * SANTA CRUZ OPERATION INC.
- *
- * The copyright notice above does not evidence any actual or intended
- * publication of such source code.
- */
-
- #ident "@(#)sgs-head:i386/head/values.h 1.33.3.7"
-
- #ifndef BITSPERBYTE
- /* These values work with any binary representation of integers
- * where the high-order bit contains the sign. */
-
- /* a number used normally for size of a shift */
- #define BITSPERBYTE 8
- #define BITS(type) (BITSPERBYTE * (int)sizeof(type))
-
- /* short, regular and long ints with only the high-order bit turned on */
- #define HIBITS ((short)(1 << BITS(short) - 1))
-
- #if defined(__STDC__)
- #define HIBITI (1U << BITS(int) - 1)
- #define HIBITL (1UL << BITS(long) - 1)
- #else
- #define HIBITI ((unsigned)1 << BITS(int) - 1)
- #define HIBITL (1L << BITS(long) - 1)
- #endif /* __STDC */
-
- /* largest short, regular and long int */
- #define MAXSHORT ((short)~HIBITS)
- #define MAXINT ((int)(~HIBITI))
- #define MAXLONG ((long)(~HIBITL))
-
- /* various values that describe the binary floating-point representation
- * _EXPBASE - the exponent base
- * DMAXEXP - the maximum exponent of a double (as returned by frexp())
- * FMAXEXP - the maximum exponent of a float (as returned by frexp())
- * DMINEXP - the minimum exponent of a double (as returned by frexp())
- * FMINEXP - the minimum exponent of a float (as returned by frexp())
- * MAXDOUBLE - the largest double
- ((_EXPBASE ** DMAXEXP) * (1 - (_EXPBASE ** -DSIGNIF)))
- * MAXFLOAT - the largest float
- ((_EXPBASE ** FMAXEXP) * (1 - (_EXPBASE ** -FSIGNIF)))
- * MAXLONGDOUBLE - the largest long double (i386 ONLY)
- * MINDOUBLE - the smallest double (_EXPBASE ** (DMINEXP - 1))
- * MINFLOAT - the smallest float (_EXPBASE ** (FMINEXP - 1))
- * MINLONGDOUBLE - the smallest long double (i386 ONLY)
- * DSIGNIF - the number of significant bits in a double
- * FSIGNIF - the number of significant bits in a float
- * LDSIGNIF - the number of significant bits in a long double (on
- * i386 ONLY)
- * DMAXPOWTWO - the largest power of two exactly representable as a double
- * FMAXPOWTWO - the largest power of two exactly representable as a float
- * LDMAXPOWTWO - the largest power of two exactly representable as
- * a long double (on i386 ONLY)
- * _IEEE - 1 if IEEE standard representation is used
- * _DEXPLEN - the number of bits for the exponent of a double
- * _FEXPLEN - the number of bits for the exponent of a float
- * _LDEXPLEN - the number of bits for the exponent of a long double (on
- * i386 ONLY )
- * _HIDDENBIT - 1 if high-significance bit of mantissa is implicit
- * LN_MAXDOUBLE - the natural log of the largest double -- log(MAXDOUBLE)
- * LN_MINDOUBLE - the natural log of the smallest double -- log(MINDOUBLE)
- * LN_MAXFLOAT - the natural log of the largest float -- log(MAXFLOAT)
- * LN_MINFLOAT - the natural log of the smallest float -- log(MINFLOAT)
- * LN_MAXLONGDOUBLE - the natural log of the largest long double (i386 ONLY)
- * LN_MINLONGDOUBLE - the natural log of the smallest long oublee (i386 ONLY)
- */
-
- #if defined(__STDC__)
-
- #if #machine(M32) || #machine(i386)
-
- #define MAXDOUBLE 1.79769313486231570e+308
-
- #ifndef MAXFLOAT
- #define MAXFLOAT ((float)3.40282346638528860e+38)
- #endif
-
- #define MINDOUBLE 4.94065645841246544e-324
- #define MINFLOAT ((float)1.40129846432481707e-45)
- #define _IEEE 1
- #define _DEXPLEN 11
- #define _HIDDENBIT 1
- #define DMINEXP (-(DMAXEXP + DSIGNIF - _HIDDENBIT - 3))
- #define FMINEXP (-(FMAXEXP + FSIGNIF - _HIDDENBIT - 3))
-
- #if #machine(i386)
- #define MAXLONGDOUBLE (+__ldmax)
- #define MINLONGDOUBLE (+__ldmin[1])
- #define _LDEXPLEN 15
- #define UNUSED_PART 16
- #define LDSIGNIF (BITS(long double)-UNUSED_PART-_LDEXPLEN+_HIDDENBIT-1)
- #define LDMINEXP (-(LDMAXEXP + LDSIGNIF - _HIDDENBIT - 3))
-
- extern const long double __ldmin[], __ldmax;
-
- #endif /* #machine(i386) */
-
- #endif /* #machine(M32) || #machine(i386) */
-
- #else /* !define(__STDC__) */
-
- #if M32 || i386
- #define MAXDOUBLE 1.79769313486231570e+308
-
- #ifndef MAXFLOAT
- #define MAXFLOAT ((float)3.40282346638528860e+38)
- #endif
-
- #define MINDOUBLE 4.94065645841246544e-324
- #define MINFLOAT ((float)1.40129846432481707e-45)
- #define _IEEE 1
- #define _DEXPLEN 11
- #define _HIDDENBIT 1
- #define DMINEXP (-(DMAXEXP + DSIGNIF - _HIDDENBIT - 3))
- #define FMINEXP (-(FMAXEXP + FSIGNIF - _HIDDENBIT - 3))
- #endif /* M32 || i386 */
-
- #if i386
- #define _LDEXPLEN 15
- #define MAXLONGDOUBLE (+__ldmax)
- #define MINLONGDOUBLE (+__ldmin[1])
- #define UNUSED_PART 16
- #define LDSIGNIF (BITS(long double)-UNUSED_PART-_LDEXPLEN+_HIDDENBIT-1)
- #define LDMINEXP (-(LDMAXEXP + LDSIGNIF - _HIDDENBIT - 3))
-
- extern const long double __ldmin[], __ldmax;
-
- #endif /* i386 */
-
- #endif /* __STDC__ */
-
- #define _LENBASE 1
- #define _EXPBASE (1 << _LENBASE)
- #define _FEXPLEN 8
-
- #define DSIGNIF (BITS(double) - _DEXPLEN + _HIDDENBIT - 1)
- #define FSIGNIF (BITS(float) - _FEXPLEN + _HIDDENBIT - 1)
-
- #if i386
- #define UNUSED_PART 16
- #define LDSIGNIF (BITS(long double)-UNUSED_PART-_LDEXPLEN+_HIDDENBIT-1)
- #endif /* i386 */
-
-
- #define DMAXPOWTWO ((double)(1L << BITS(long) - 2) * \
- (1L << DSIGNIF - BITS(long) + 1))
- #define FMAXPOWTWO ((float)(1L << FSIGNIF - 1))
- #if i386
- #if defined(__STDC__)
- #if defined(__cplusplus)
- extern "C" long double ldexpl(long double, int);
- #else
- extern long double ldexpl(long double, int);
- #endif /* defined(__cplusplus) */
- #else
- extern long double ldexpl();
- #endif /* defined(__STDC__) */
- #define LDMAXPOWTWO (long double)ldexpl(1.0L, 63)
- #define LDMAXEXP ((1 << _LDEXPLEN - 1) - 1 + _IEEE )
- #define LN_MAXLONGDOUBLE ((long double)(M_LN2 * LDMAXEXP))
- #define LN_MINLONGDOUBLE ((long double)(M_LN2 * (LDMINEXP - 1)))
- #endif /* i386 */
-
- #define DMAXEXP ((1 << _DEXPLEN - 1) - 1 + _IEEE)
- #define FMAXEXP ((1 << _FEXPLEN - 1) - 1 + _IEEE)
-
- #define LN_MAXDOUBLE (M_LN2 * DMAXEXP)
- #define LN_MAXFLOAT (float)(M_LN2 * FMAXEXP)
- #define LN_MINDOUBLE (M_LN2 * (DMINEXP - 1))
- #define LN_MINFLOAT (float)(M_LN2 * (FMINEXP - 1))
-
- #define H_PREC (DSIGNIF % 2 ? (1L << DSIGNIF/2) * M_SQRT2 : 1L << DSIGNIF/2)
- #define FH_PREC (float)(FSIGNIF % 2 ? (1L << FSIGNIF/2) * M_SQRT2 : 1L << FSIGNIF/2)
- #define LH_PREC (LDSIGNIF % 2 ? (1L << LDSIGNIF/2) * M_SQRT2 : 1L << LDSIGNIF/2)
- #define X_EPS (1.0/H_PREC)
- #define FX_EPS (float)((float)1.0/FH_PREC)
- #define LX_EPS (1.0/LH_PREC)
- #define X_PLOSS ((double)(long)(M_PI * H_PREC))
- #define FX_PLOSS ((float)(long)(M_PI * FH_PREC))
-
- #define LX_PLOSS ((long double)(long)(M_PI * LH_PREC))
-
- #define X_TLOSS (M_PI * DMAXPOWTWO)
- #define FX_TLOSS (float)(M_PI * FMAXPOWTWO)
- #define LX_TLOSS (M_PI * LDMAXPOWTWO)
- #define M_LN2 0.69314718055994530942
- #define M_PI 3.14159265358979323846
- #define M_SQRT2 1.41421356237309504880
- #define MAXBEXP DMAXEXP /* for backward compatibility */
- #define MINBEXP DMINEXP /* for backward compatibility */
- #define MAXPOWTWO DMAXPOWTWO /* for backward compatibility */
-
- #endif /* BITSPERBYTE */
-