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tigerneil / aparapi

Automatically exported from code.google.com/p/aparapi
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GPU and JTP give different results with complex calculations #85

Open GoogleCodeExporter opened 8 years ago

GoogleCodeExporter commented 8 years ago 
For example code that produces different results please see: 
https://github.com/er453r/Aparapi-RNG/blob/master/src/com/er453r/aparapi/rng/Mer
senneTwisterKernel.java

random method.

To replicate the results one can use: 
https://github.com/er453r/Aparapi-RNG/blob/master/src/com/er453r/aparapi/tests/G
PUCPUComparisonTests.java

From my initial analysis of OpenCL code generated by aparapi the issue is with 
the >>> operator, and how Java doesn't know about unsigned integers.

Original issue reported on code.google.com by er4...@gmail.com on 11 Dec 2012 at 1:37