Mikroelektronika MIKROE-742 데이터 시트

494

- SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD

CHAPTER 6

function fabs(d : real) : real;

Description The function returns the value of parameter x rounded down to the nearest integer.

function frexp(value : real; var eptr : integer) : real;

The function splits a floating-point value value into a normalized fraction and an
integral power of 2. The return value is a normalized fraction and the integer
exponent is stored in the object pointed to by 

eptr

.

function ldexp(value : real; newexp : integer) : real;

The function returns the result of multiplying the floating-point number value by
2 raised to the power newexp (i.e. returns 

value * 2newexp

).

function log(x : real) : real;

Description The function returns the natural logarithm of x (i.e. 

loge(x)

).

function log10(x : real) : real;

Description The function returns the base-10 logarithm of x 

(i.e. log10(x)

).

function modf(val : real; var iptr : real) : real;

The function returns the signed fractional component of 

val

, placing its whole

number component into the variable pointed to by iptr.

function pow(x : real; y : real) : real;

The function returns the value of x raised to the power y (i.e. xy). If x is nega-
tive, the function will automatically cast y into 

longint

.