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HUGE_VAL is defined as DBL_MAX.
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XGC supports all the math functions defined in the
ANSI standard.
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XGC does not support math functions for long double
arguments. However because long double is defined to
use the same machine representation as double, the
ANSI standard functions may be used.
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Functions generally do not raise exceptions for
domain errors. Instead they return a value as if the
argument was at the nearest limit of the domain. For
example, asin (1.5) will return pi/2. Thus by
ignoring the value of errno, and by masking the
interrupts for arithmetic overflow, we get a
saturated arithmetic behavior.
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Where applicable, the maximum and RMS error values
are given.
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