[Sablevm-bugs] [ sablevm-Bugs-597368 ] Need to workaround the x86 division bug

[<no...@so...>]

Bugs item #597368, was opened at 2002-08-19 13:36
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=105523&aid=597368&group_id=5523

Category: Execution Problem
Group: SableVM
Status: Open
Resolution: None
Priority: 5
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: Need to workaround the x86 division bug

Initial Comment:
/* test that we don't get tripped up by x86 problem */

public class divtest {

    public static int divfunc(int x, int y) {
      return x/y;
    }

    public static void main(String args[]) {

      int i = 0x80000000;
      int j = -1;

      int k = divfunc(i,j);     // x86 causes trap for
no good reason
      System.out.println("Result is
"+Integer.toHexString(k));
    }
}


This program should output "Result is 80000000" but
instead
we get (when running on i386):

java.lang.ArithmeticException
        at divtest.divfunc(divtest.java:6)
        at divtest.main(divtest.java:14)
        at
java.lang.VirtualMachine.invokeMain(VirtualMachine.java)
        at
java.lang.VirtualMachine.main(VirtualMachine.java:88)

Kaffe ran into this same problem. I don't know the
details but
it has something to do with an x86 integer division
bug.


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You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=105523&aid=597368&group_id=5523