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I have another question regarding numerical accuracy. I noticed that when operating on the same set of data repeatedly (ie. running a iterative algorithm), the difference between CPU and FPGA's result gets quite big when the problem size and number of iteration is large. When not using -fp-releaxed nor -fpc flag during compilation, the difference gets smaller but is still significant. Is this due to Altera implemented floating point arithmetic differently then Intel? I thought that they both conform to IEEE 754 stardand?
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Read
https://software.intel.com/sites/default/files/article/164389/fp-consistency-102511.pdf Intel is not even consistent with itself. We are very consistent, we adhere to IEEE 754 with rounding to nearest.
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