IBETA

The radix in which numbers are represented. A longword integer.

IT

The number of base-IBETA digits in the floating-point mantissa M. A longword integer.

IRND

A code in the range 0 - 5 giving information on what type of rounding is done and how underflow is handled. A longword integer.

NGRD

The number of " guard digits" used when truncating the product of two mantissas. A longword integer.

MACHEP

The exponent of the smallest power of IBETA that, added to 1.0, gives something different from 1.0. A longword integer.

NEGEP

The exponent of the smallest power of IBETA that, subtracted from 1.0, gives something different from 1.0. A longword integer.

IEXP

The number of bits in the exponent. A longword integer.

MINEXP

The smallest value of IBETA consistent with there being no leading zeros in the mantissa. A longword integer.

MAXEXP

The smallest positive value of IBETA that causes overflow. A longword integer.

EPS

The floating-point number IBETA ^MACHEP , loosely referred to as the " floating-point precision."

EPSNEG

The floating-point number IBETA ^NEGEP , which is another way of determining floating-point precision.

XMIN

The floating-point number IBETA ^MINEXP , generally the smallest usable floating-point value.

XMAX

The largest usable floating-point value, defined as the number (1-EPSNEG)xIBETA ^MAXEXP ·