Absolute value without sign *Resolved*

[jim mcnamara]

There are a lot of 'abs' functions - cabs(), labs(), etc.

The generally accepted dogma is that you should use a macro for functions like sgn(), abs(), etc because they are faster - a lot faster.

Kinda like this:

#define abs(c)  ( (c<0) ? (-1)*c : c )

You can also force 'inlining' by using macros -
This does a complex reciprocal for instance.
arg & out are type Complex (a struct)

#define LCMPLXrecip(arg,out)	\
{ long denom; denom = lsqr((arg).x) + lsqr((arg).y);\
if(denom==0L) overflow=1; else {(out).x = divide((arg).x,denom,bitshift);\
(out).y = -divide((arg).y,denom,bitshift);}}