ffc team mailing list archive

["Ostien, Jakob T" <jtostie@xxxxxxxxxx>]

Hi,

Just for fun I tried to compile a form with -fprecision=32, to see if that would impact a problem I was seeing.  The generated code was not what I expected.

For example, using the default, the factor 1/3 is represented as:
  0.333333333333333

But for -fprecision=32 (for the same form) 1/3 becomes
  0.33333333333333331482961625624739

Obviously that latter isn't really that much better than the former.

Is this known?  I can only guess what's happening, anyone have a solid idea?  Possibly (hopefully) its an environment issue that I can fix locally.

Jake