ANSI-compatible routines for floating point arithmetic

### Functions

abs
Absolute value of a number.
acos
Floating point arc cosine.
acosh
Floating point hyperbolic area cosine.
asin
Floating point arc sine.
asinh
Floating point hyperbolic area sine.
atan2
Four-quadrant arc tangent of y/x (or argument of the complex number).
atan
Floating point arc tangent.
atanh
Floating point hyperbolic area tangent.
atof
Converts a string to a floating point.
cacos
Complex arc cosine.
cacosh
Complex hyperbolic area cosine.
casin
Complex arc sine.
casinh
Complex hyperbolic area sine.
catan
Complex arc tangent.
catanh
Complex hyperbolic area tangent.
ccos
Complex cosine.
ccosh
Complex hyperbolic cosine.
ceil
Rounds up the floating point number.
cexp
Complex exponential function.
cln
Complex natural logarithm (base e).
clog10
Complex logarithm, base 10.
cos
Floating point cosine.
cosh
Floating point hyperbolic cosine.
csin
Complex sine.
csinh
Complex hyperbolic sine.
csqrt
Complex square root.
ctan
Complex tangent.
ctanh
Complex hyperbolic tangent.
exp
Floating point exponential function.
fabs
Absolute value of a floating point number.
floor
Rounds down the floating point number.
fmod
Calculates x modulo y, i.e. the remainder of x/y.
frexp10
Splits floating point number into mantissa and exponent.
hypot
Calculates hypotenuse of right triangle.
is_inf
Checks whether the argument is an infinite number.
is_nan
Checks whether the argument is Not_a_Number.
is_nzero
Checks whether the argument is negative zero.
is_pzero
Checks whether the argument is positive zero.
is_sinf
Checks whether the argument is signed infinity.
is_transfinite
Checks whether the argument is a transfinite number.
is_uinf_or_nan
Checks whether the argument is unsigned infinity or Not_a_Number.
is_uzero
Checks whether the argument is unsigned zero.
labs
Absolute value of a long integer number.
ldexp10
Calculates x times 10 raised to exponent.
log
Floating point natural logarithm (base e).
log10
Floating point logarithm, base 10.
modf
Splits floating point value into integer and fraction part.
pow
Floating point power function.
sin
Floating point sine.
sinh
Floating point hyperbolic sine.
sqrt
Floating point square root.
tan
Floating point tangent.
tanh
Floating point hyperbolic tangent.

### Constants

HALF_PI
A constant with value PI/2.
NAN
A constant defining an undefined value.
NEGATIVE_INF
Represents an infinitely large negative quantity.
NEGATIVE_ZERO
Represents an infinitely small quantity which is known to be always non-positive.
PI
An approximated value of pi.
POSITIVE_INF
Represents an infinitely large positive quantity.
POSITIVE_ZERO
Represents an infinitely small quantity which is known to be always non-negative.
UNSIGNED_INF
Represents an infinite quantity.
UNSIGNED_ZERO
Represents an infinitely small quantity with indeterminate sign.
ZERO
A deprecated constant.

### Predefined Types

bcd
Represents the internal organization of floating point numbers in the format recognized by the TIOS.
Bool
An enumeration to describe true or false values.

Note: All functions which return a result of type float are implemented as macros, although many of them exist as TIOS entries. This is done because the GCC convention for returning floating point values as function results differs from the convention expected by the TIOS. This note is mainly unimportant from the user's point of view. Also note that the timath.h header file contains all functions from math.h, but in addition to this, it also contains some TIOS-specific low-level floating point functions.