The assembler supports many built-in mathematical functions. The built-in functions always return a value and they can be used in conditional assembly or any place where a constant can be used.
In Table 4-7 x, y and z are type float, n is an int. The functions $cvi, $int and $sgn return an integer and all other functions return a float. Angles for trigonometric functions are expressed in radians.
| Function | Description |
|---|---|
| $acos(x) | Returns cos-1(x) in range [0, π], -1<=x<=1 |
| $asin(x) | Returns sin-1(x) in range [-π/2, π/2], -1<=x<=1 |
| $atanx) | Returns tan-1(x) in range [-π/2, π/2] |
| $atan2(x, y) | Returns tan-1(y/x) in range [-π, π] |
| $ceil(x) | Returns the smallest integer not less than x, as a float |
| $cos(x) | Returns the cosine of x |
| $cosh(x) | Returns the hyperbolic cosine of x |
| $cvf(n) | Converts an integer to a float |
| $cvi(x) | Converts a float to an integer. Returns an integer. |
| $exp(x) | Returns the exponential function ex |
| $fabs(x) | Returns the absolute value |x| |
| $floor(x) | Returns the largest integer not greater than x, as a float |
| $fmod(x, y) | Returns the floating-point remainder of x/y, with the same sign as x |
| $int(x) | Returns 1 if x has an integer value; else returns 0. Returns an integer. |
| $ldexp(x, n) | Multiplies x by an integer power of 2. That is, x × 2n |
| $log(x) | Returns the natural logarithm ln(x), where x>0 |
| $log10(x) | Returns the base-10 logarithm log10(x), where x>0 |
| $max(x, y, ...z) | Returns the greatest value from the argument list |
| $min(x, y, ...z) | Returns the smallest value from the argument list |
| $pow(x, y) | Returns xy |
| $round(x) | Returns x rounded to the nearest integer |
| $sgn(x) | Returns the sign of x. Returns 1 if x is positive, 0 if x is zero, and -1 if x is negative. Returns an integer. |
| $sin(x) | Returns the sine of x |
| $sinh(x) | Returns the hyperbolic sine of x |
| $sqrt(x) | Returns the square root of x, x≥0 |
| $strtod(str) | Converts a character string to a double precision floating-point value. The string contains a properly-formatted C99-style floating-point literal. |
| $tan(x) | Returns the tangent of x |
| $tanh(x) | Returns the hyperbolic tangent of x |
| $trunc(x) | Returns x truncated toward 0 |