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Posted to commits@harmony.apache.org by "Evgeniya Maenkova (JIRA)" <ji...@apache.org> on 2008/02/09 15:05:08 UTC
[jira] Updated: (HARMONY-5480) [drlvm][jit] Some of java.lang.Math
methods could be implemented by api_magics
[ https://issues.apache.org/jira/browse/HARMONY-5480?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Evgeniya Maenkova updated HARMONY-5480:
---------------------------------------
Attachment: vm.math.patch2
patch attached
> [drlvm][jit] Some of java.lang.Math methods could be implemented by api_magics
> ------------------------------------------------------------------------------
>
> Key: HARMONY-5480
> URL: https://issues.apache.org/jira/browse/HARMONY-5480
> Project: Harmony
> Issue Type: Improvement
> Components: DRLVM
> Reporter: Evgeniya Maenkova
> Attachments: MathTest.java, vm.math.patch2
>
>
> The patch gives >7x speedup on my laptop on test mentioned below:
> package math;
> public class MathTest {
> static void f() {
> Math.abs(-123987.1236d);
> Math.asin(0.7);
> Math.acos(0.7);
> Math.log(123.123);
> Math.log10(123.123);
> Math.log1p(123.123);
> Math.sin(12312.123);
> Math.cos(12312.123);
> Math.sqrt(234234.234234);
> Math.tan(234234.12342134);
> Math.atan(2347.234);
> Math.atan2(231.123, 0);
> Math.abs(-123.1231123f);
> }
> public static void main(String[] args) {
> System.out.println("Warmup started....");
> for (int i = 0; i < 2500 * 2500; i ++) {
> f();
> }
> for (int i = 0; i < 250 * 2500; i ++) {
> f();
> }
> System.out.println("Warmup ended....");
> long start = System.currentTimeMillis();
> for (int i = 0; i < 2500 * 2500; i ++) {
> f();
> }
> System.out.println("floor result: " + (System.currentTimeMillis() - start));
> }
> }
> Administrator@EGMAENKO-MOBL /cygdrive/c/ecl_311_ws/MicroBenches/bin1
> $ /cygdrive/c/home_test/temp_builds/egm_r618602_Mj_Mc/bin/java -XX:jit.arg.Math
> _as_magic=true -Xem:server math.MathTest
> Warmup started....
> Warmup ended....
> floor result: 4875
> Administrator@EGMAENKO-MOBL /cygdrive/c/ecl_311_ws/MicroBenches/bin1
> $ /cygdrive/c/home_test/temp_builds/egm_r618602_Mj_Mc/bin/java -XX:jit.arg.Math
> _as_magic=false -Xem:server math.MathTest
> Warmup started....
> Warmup ended....
> floor result: 34141
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