In the Kepler architecture whitepaper, NVIDIA states that there are 32 Special Function Units (SFUs) and 32 Load/Store Units (LD/ST) on a SMX.
The SFU are for "fast approximate transcendental operations". Unfortunately, I don't understand what this is supposed to mean. On the other hand, at Special CUDA Double Precision trig functions for SFU it is said, that they only work in single precision. Is this still correct on a K20Xm?
The LD/ST units are obviously for storing and loading. Is any memory load/write required to go through one of theses? And are they also used as a single warp? In other words, can there be only one warp which is currently writing or reading?
Cheers, Andi