[Libre-soc-bugs] [Bug 546] data moving / merging Function Unit (FSM)

bugzilla-daemon at libre-soc.org bugzilla-daemon at libre-soc.org
Tue Dec 15 18:04:44 GMT 2020


https://bugs.libre-soc.org/show_bug.cgi?id=546

--- Comment #4 from Jacob Lifshay <programmerjake at gmail.com> ---
(In reply to Jacob Lifshay from comment #3)
> (In reply to Luke Kenneth Casson Leighton from comment #1)
> > and consequently if the 4-4-4 data comes in on Lane0 and needs to be
> > converted to FP64 it will be another 2 clock cycles to shift to where Lane2
> > can read the B value.
> 
> Texture read won't need to produce fp64 values unless the pixels are stored
> in fp64 (very uncommon).

The common data types produced by a texture read are f32 and f16 (only if f16
arithmetic is supported), and signed/unsigned 32-bit integer types.

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