Logarithmic Functions (IM:PN)

Inside Macintosh: PowerPC Numerics / Part 2 - The PowerPC Numerics C Implementation: Chapter 10 - Transcendental Functions

Logarithmic Functions
MathLib provides seven logarithmic functions:
$frexp(x,exp)$ Splits x into fraction and exponent fields.
$log(x)$ Base e or natural logarithm.
$log10(x)$ Base 10 logarithm.
$log1p(x)$ Computes $log(1+x)$ .
$log2(x)$ Base 2 logarithm.
$logb(x)$ Returns exponent part of x.
$modf(x,iptr)$ Splits x into an integer and a fraction.

$frexp(x,exp)$	Splits x into fraction and exponent fields.
$log(x)$	Base e or natural logarithm.
$log10(x)$	Base 10 logarithm.
$log1p(x)$	Computes $log(1+x)$ .
$log2(x)$	Base 2 logarithm.
$logb(x)$	Returns exponent part of x.
$modf(x,iptr)$	Splits x into an integer and a fraction.