Vulkan requires full ieee754 precision for all F/D instructions except for fdiv and fsqrt.
+https://www.khronos.org/registry/vulkan/specs/1.0/html/vkspec.html#spirvenv-precision-operation
+
+OpenCL slightly different, suggest adding as an extra entry.
+
https://www.khronos.org/registry/OpenCL/specs/2.2/html/OpenCL_Env.html#relative-error-as-ulps