Hi, Christian Thalinger (twisti) of the CACAO project has recently been looking at using the OpenJDK libraries with CACAO as the VM (via a suitable libjvm.so) to allow it to be built on non-HotSpot supported platforms (e.g. ppc, ppc64, alpha). I've just been testing this on ppc64 this morning.
The trigonometric functions (sin, cos, tan) seem to run into difficulties on these new platforms. On x86, x86_64 and sparc, sin(0.7) returns the correct answer of 0.644217687237691. On alpha, the same test gives -0.9589410493575494 while it returns the input value of 0.7 on both ppc and ppc64. Ironically, gij on ppc64 gives the correct answer. This was spotted when running SPECs check: 5$ cacao -cp ./check.jar spec/jbb/validity/PepTest LOG: [0x30021cd0] JVM_GetStackAccessControlContext: IMPLEMENT ME! LOG: [0x30021cd0] JVM_GetStackAccessControlContext: IMPLEMENT ME! LOG: [0x30021cd0] JVM_FindSignal: name=HUP LOG: [0x30021cd0] JVM_RegisterSignal: sig=0, handler=0x2, IMPLEMENT ME! LOG: [0x30021cd0] JVM_FindSignal: name=INT LOG: [0x30021cd0] JVM_RegisterSignal: sig=0, handler=0x2, IMPLEMENT ME! LOG: [0x30021cd0] JVM_FindSignal: name=TERM LOG: [0x30021cd0] JVM_RegisterSignal: sig=0, handler=0x2, IMPLEMENT ME! LOG: [0x30021cd0] JVM_GetStackAccessControlContext: IMPLEMENT ME! LOG: [0x30021cd0] JVM_GetStackAccessControlContext: IMPLEMENT ME! LOG: [0x30021cd0] JVM_GetSystemPackage: IMPLEMENT ME! LOG: [0x30021cd0] JVM_GetSystemPackage: IMPLEMENT ME! testIf: OK testArray: OK testBitOps: OK testFor: OK testDiv: OK testTableSwitch: OK testLookupSwitch: OK testHiddenField: OK checkRemainders: long double OK checkMathFcts: sin(0.7) evaluated to: 0.7, expected: 0.644218 cos(0.7) evaluated to: 1.0, expected: 0.764842 acos(0.7) evaluated to: 1.5707963267948966, expected: 0.795399 atan(0.7) evaluated to: 0.7, expected: 0.610726 ****************************************** Some math function failed ****************************************** Primes less than 50: 2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 testExc1(simple throw/catch): OK testExc2(skip catch clauses): OK testExc3(catch in inner): OK testExc4(catch in outer): OK testExc5(rethrow): OK testExc6(throw accross call): OK testExc7(throw accr. 2 calls): OK loopExitContinueInExceptionHandler: OK testStringHash: OK testClone: OK testObjectArray: OK checkInstanceOf: OK checkInterfaceInstanceOf: OK testWaitNull: OK testVarAndMethodNameClash: OK testMisk: OK testGC: OK testRandom : OK PepTest: error Any idea what the problem may be and when this may be rectified? Thanks, -- Andrew :)
