Pocl automatically sets fp-contract=off when generating code. This has
significant implications; in particular, nans are then handled incorrectly.
Pocl should never do this on its own -- this needs to be a user option,
enabled e.g. by pragmas or by choosing fast-math.
A nearby comment states
# With fp-contract we get calls to fma with processors which do not
# have fma instructions. These ruin the performance. Better to have
# the mul+add separated in the IR.
Which architecture and which benchmark is this?
Could we instead use fast-math for benchmarks only?
-erik
--
Erik Schnetter <[email protected]>
http://www.perimeterinstitute.ca/personal/eschnetter/
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