Experimental Physics and
Industrial Control System

Dirk Zimoch <[email protected]> · Mon, 02 Apr 2007 09:24:11 +0200

Hi Oleg,
try to switch off optimization and recompile EPICS base. There is a bug in one
cross-compiler version on Linux (I don't remember which version).
This calculation does not work correctly with optimization:
double a,b,c;
a=(b==c);
It calculates a=(b<=c) instead (or something like this).
BTW: The cross compiler for Solaris as provided by WR does not have this bug.
And this always works:
double a,b,c;
int i;
i=(b==c);
a=i;
Dirk
Oleg A. Makarov wrote:

We encounter misbehaviour of a CALC record in the IOC running under EPICS 3.14.9/tornado 2.2.1.

(but it works correctly under EPICS 3.14.9/tornado 2.0.2) 

Test database consists of two records - CALC and BI, see below.
No matter what value - 1 or 0 - is written by "caput" program to "myBi", "myCalc" always has VAL=1
However, with CALC field changed to <A#0>, myCalc.VAL field updates correctly with changes of "myBi".
What is wrong?

Regards,
Oleg Makarov
record(calc, myCalc) {
 field(SCAN, "1 second")
 field(CALC, "A=1")
 field(INPA, "myBi")
}
record(bi, myBi) {
}

--
Dr. Dirk Zimoch
Computing and Controls
Paul Scherrer Institut
phone +41 56 310 5182
fax   +41 56 310 4413

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System