I've also tested the BigInteger.toString() problem with the current CVS trunk, and the problem remains. Processing of the program simply terminates silently upon calling BigInteger.toString(). Original problem report attached below.
Are there limitations to the size numbers that can be processed with the gmp libraries? Or is this a limitation when used with kaffe only? ------- I've been happily experimenting with using Kaffe to run my programming language/calculating tool "Frink" : http://futureboy.homeip.net/frinkdocs/ in order to get the high-performance integer performance of the GP library, but I'm having some problems. I've compiled Kaffe with the GMP libraries on Linux (Red Hat 9). Engine: Just-in-time v3 Version: 1.1.4 Java Version: 1.1 Note: I compiled GMP with --disable-fft due to known bugs in the FFT multiplication routines. When I try to calculate and display large integers (say, large Mersenne primes, it works up to a point, and then large numbers, say, 2^13466917-1 simply don't get formatted at all by the toString() method. Running the "top" command shows that nothing's running, no exceptions are thrown, and the program doesn't continue. Below is a sample program that illustrates the problem. If you replace the number 13466917 with a smaller number, it is displayed correctly. This sample works as expected (although bloody slow (15+ hours ?!) for the toString() method in Sun's VMs.) ------------------------------------------------------ import java.math.BigInteger; public class BigIntTest { /** This calculates the (previously) largest-known Mersenne Prime, 2^13466917 - 1 */ public static void main(String[] args) { System.out.println("Starting"); BigInteger b = new BigInteger("2"); BigInteger p = b.shiftLeft(13466917 - 1); System.out.println("Exponentiation complete"); p = p.subtract(new BigInteger("1")); System.out.println("Subtraction complete"); System.out.println(p.toString()); System.out.println("Formatting completed."); } } ------------------------------------------------------------- -- Alan Eliasen | "You cannot reason a person out of a [EMAIL PROTECTED] | position he did not reason himself http://futureboy.homeip.net/ | into in the first place." | --Jonathan Swift _______________________________________________ kaffe mailing list [EMAIL PROTECTED] http://kaffe.org/cgi-bin/mailman/listinfo/kaffe