Don't use simd::pow() in tests for now
Don't use simd::pow() in tests for now

Known issue that simd::pow(0.0f) is a bit off..

tu500/visionaray,tu500/visionaray,szellmann/visionaray,szellmann/visionaray,ukoeln-vis/ctpperf,ukoeln-vis/ctpperf