tree 16acb30f62c4783fab537ae3abcc92a6d76b9e5a
parent a501947a840debe772458764d2b4595e403678d2
author Martin Storsjö <martin@martin.st> 1587622765 +0300
committer Martin Storsjö <martin@martin.st> 1587728466 +0300

dnn-layer-mathbinary-test: Fix tests for cases with extra intermediate precision

This fixes tests on 32 bit x86 mingw with clang, which uses x87
fpu by default.

In this setup, while the get_expected function is declared to
return float, the compiler is (especially given the optimization
flags set) free to keep the intermediate values (in this case,
the return value from the inlined function) in higher precision.

This results in the situation where 7.28 (which actually, as
a float, ends up as 7.2800002098), multiplied by 100, is
728.000000 when really forced into a 32 bit float, but 728.000021
when kept with higher intermediate precision.

For the multiplication case, a more suitable epsilon would e.g.
be 2*FLT_EPSILON*fabs(expected_output), but just increase the
current hardcoded threshold for now.

Signed-off-by: Martin Storsjö <martin@martin.st>