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log10d64.3m (2010 09)

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log10d64(3M) log10d64(3M)
(HP Integrity Server Only)
NAME
log10d64(), log10d128(), log10d32() - decimal base-10 logarithm functions
SYNOPSIS
#define __STDC_WANT_DEC_FP__
#include <math.h>
_Decimal64 log10d64(_Decimal64 x);
_Decimal128 log10d128(_Decimal128 x);
_Decimal32 log10d32(_Decimal32 x);
DESCRIPTION
log10d64() returns the base-10 logarithm of x.
log10d128() is a _Decimal128 version of log10d64(); it takes a
_Decimal128 argument and
returns a
_Decimal128 result.
log10d32() is a _Decimal32 version of log10d64(); it takes a
_Decimal32 argument and
returns a
_Decimal32 result.
These math functions are supported for HP-UX 11i Version 3 September 2008 Update and forward.
USAGE
To use any of these functions, compile with the
+decfp option.
Make sure your program defines
__STDC_WANT_DEC_FP__
and then includes <math.h>.
Link in the math library by specifying
-lm or -l:libm.a on the linking command line.
For more information, see the HP-UX floating-point guide for HP Integrity servers at the following site:
http://www.hp.com/go/fp
.
RETURN VALUE
If x is +infinity,
log10d64() returns +infinity.
If x is 0,
log10d64() returns − infinity and raises the divide-by-zero exception.
If x is less than 0,
log10d64() returns NaN and raises the invalid exception.
If x is NaN,
log10d64() returns NaN.
log10d64() raises the inexact exception whenever a rounded result does not equal the mathematical
result.
ERRORS
If x is less than 0,
log10d64() sets errno to [EDOM].
If x is 0,
log10d64() sets errno to [ERANGE].
SEE ALSO
exp10d64(3M), log1pd64(3M), log2d64(3M), logd64(3M), math(5).
STANDARDS CONFORMANCE
These functions conform to ISO/IEC TR 24732, "Extension for the programming language C to support
decimal floating-point arithmetic".
HP-UX 11i Version 3: September 2010 − 1 − Hewlett-Packard Company 1

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