[fpc-pascal] Severe bug (?) dividing comp variables in 3.0.0

greim greim at schleibinger.com
Wed Jun 29 16:56:39 CEST 2016


Hi,

there seems to be a very strange effect with dividing comp variables in 
3.0.0:

Dividing a comp variable x by any number which is not 1 or x gives result 0.

Tested on a i386 machine.

It works fine with for example with fpc 2.6.4.
I know I can use int64 instead, but we have a lot of very old, but 
reliable, code around.

Example below.

Regards

Markus



--------------------------------------------------------------------------
PROGRAM compbug300;

VAR x1, x2 : comp;

(* Dividing 8 / 2 doesn't work with fpc 3.0.0
    but works for example with fpc 2.6.4
    Markus Greim / 29.jun.2016 *)

BEGIN

x1 := 8;
writeln('x1 : ',x1);
x2 := x1 / 2;
writeln('x2 = x1/2 should be 4 but is : ', x2);
x2 := x1 / 4;
writeln('x2 = x1/4 should be 2 but is : ', x2);
x2 := x1 / 8.0;
writeln('x2 = x1/8.0 should be 1 and is : ', x2);


END.


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