Hide NaN code with -ffast-math

Author: davidrohr

Common/ML/include/ML/3rdparty/GPUORTFloat16.h

@@ -568,9 +568,11 @@ GPUdi() uint16_t BFloat16Impl<Derived>::ToUint16Impl(float v) noexcept
 template <class Derived>
 GPUdi() float BFloat16Impl<Derived>::ToFloatImpl() const noexcept
 {
+#ifndef __FAST_MATH__
   if (IsNaN()) {
     return o2::gpu::CAMath::QuietNaN();
   }
+#endif
   float result;
   char* const first = reinterpret_cast<char*>(&result);
   char* const second = first + sizeof(uint16_t);

GPU/Common/GPUCommonMath.h

@@ -99,12 +99,9 @@ class GPUCommonMath
   GPUhdi() static float Remainderf(float x, float y);
   GPUd() constexpr static bool Finite(float x);
   GPUd() constexpr static bool IsNaN(float x);
-#pragma GCC diagnostic push
-#if defined(__FAST_MATH__) && defined(__clang__)
-#pragma GCC diagnostic ignored "-Wnan-infinity-disabled"
-#endif
+#ifndef __FAST_MATH__
   GPUd() constexpr static float QuietNaN() { return GPUCA_CHOICE(std::numeric_limits<float>::quiet_NaN(), __builtin_nanf(""), nan(0u)); }
-#pragma GCC diagnostic pop
+#endif
   GPUd() constexpr static uint32_t Clz(uint32_t val);
   GPUd() constexpr static uint32_t Popcount(uint32_t val);