4495092003-11-08Martin Stjernholm // $Id: Float.pmod,v 1.3 2003/11/08 16:08:49 mast Exp $
a63b362003-11-07Martin Stjernholm  #pike __REAL_VERSION__ constant DIGITS_10 = __builtin.FLOAT_DIGITS_10; constant MIN_10_EXP = __builtin.FLOAT_MIN_10_EXP; constant MAX_10_EXP = __builtin.FLOAT_MAX_10_EXP; constant MIN = __builtin.FLOAT_MIN; constant MAX = __builtin.FLOAT_MAX; constant EPSILON = __builtin.FLOAT_EPSILON; //! These constants define the limits for floats on the current //! architecture: //! //! @dl //! @item DIGITS_10 //! The number of decimal digits that can be represented. Any number //! with this many decimal digits can be stored in a float and
4495092003-11-08Martin Stjernholm //! converted back to decimal form without change. @[DIGITS_10] is //! not less than @expr{6@}.
a63b362003-11-07Martin Stjernholm //! @item MIN_10_EXP //! @item MAX_10_EXP //! Limits of the exponent in decimal base. 10 raised to any number //! within this range can be represented in normalized form.
4495092003-11-08Martin Stjernholm //! @[MIN_10_EXP] is not greater than @expr{-37@}. @[MAX_10_EXP] is //! not less than @expr{37@}.
a63b362003-11-07Martin Stjernholm //! @item MIN
4495092003-11-08Martin Stjernholm //! The smallest normalized float greater than zero. It's not //! greater than @expr{1e-37@}.
a63b362003-11-07Martin Stjernholm //! @item MAX
4495092003-11-08Martin Stjernholm //! The largest finite float. It's not less than @expr{1e37@}.
a63b362003-11-07Martin Stjernholm //! @item EPSILON //! The difference between 1 and the smallest value greater than 1
4495092003-11-08Martin Stjernholm //! that can be represented. It's not greater than @expr{1e-5@}.
a63b362003-11-07Martin Stjernholm //! @enddl //! //! @note //! The size of the float type can be controlled when Pike is compiled //! with the configure flags @expr{--with-double-precision@} and //! @expr{--with-long-double-precision@}. The default is to use the //! longest available float type that fits inside a pointer.
5a2c192003-11-07Martin Stjernholm #if constant (__builtin.__FLOAT_PRECISION_FLOAT__)
a63b362003-11-07Martin Stjernholm constant FLOAT_PRECISION = __builtin.__FLOAT_PRECISION_FLOAT__;
5a2c192003-11-07Martin Stjernholm #endif #if constant (__builtin.__DOUBLE_PRECISION_FLOAT__)
a63b362003-11-07Martin Stjernholm constant DOUBLE_PRECISION = __builtin.__DOUBLE_PRECISION_FLOAT__;
5a2c192003-11-07Martin Stjernholm #endif #if constant (__builtin.__LONG_DOUBLE_PRECISION_FLOAT__)
a63b362003-11-07Martin Stjernholm constant LONG_DOUBLE_PRECISION = __builtin.__LONG_DOUBLE_PRECISION_FLOAT__;
5a2c192003-11-07Martin Stjernholm #endif //! @decl constant FLOAT_PRECISION; //! @decl constant DOUBLE_PRECISION; //! @decl constant LONG_DOUBLE_PRECISION; //! //! Tells which C compiler float type that is used for Pike floats. //! Only one of these constants will exist (with the value @expr{1@}) //! at runtime.
a63b362003-11-07Martin Stjernholm //! //! @dl //! @item FLOAT_PRECISION //! The @expr{float@} type of the C compiler is used. //! @item DOUBLE_PRECISION //! The @expr{double@} type of the C compiler is used. //! @item LONG_DOUBLE_PRECISION //! The @expr{long double@} type of the C compiler is used. //! @enddl
5a2c192003-11-07Martin Stjernholm //! //! @note //! The float type can be controlled when Pike is compiled with the //! configure flags @expr{--with-double-precision@} and //! @expr{--with-long-double-precision@}. The default is to use the //! longest available float type that fits inside a pointer.