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OpenGL & Vulkan

Adept II

Which cards support "Extended double precision"?

Direct3D has two levels of optional double precision support in shaders: Basic/default and extended. I was wondering, which AMD GPUs support extended double precision under Direct3D?

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Adept II

Re: Which cards support "Extended double precision"?

To answer my question (partially), I have verified that the extended double precision instructions are at least supported on GCN cards. However, it appears (surprisingly)  that Trinity/Richland APUs do not support fp64 at all under DirectCompute. I have no idea about 5800 series cards but my guess is they do support all fp64 functionality under DirectCompute.