[libre-riscv-dev] https://libre-riscv.org/resources/ page

[Michael Pham]

Ah, I see. Thank you for clearing up my misunderstanding :)

On Sun, Sep 15, 2019 at 5:05 PM Jacob Lifshay <programmerjake at gmail.com> wrote:
>
> On Sun, Sep 15, 2019, 13:46 Michael Pham <pham.michael.98 at gmail.com> wrote:
>
> > Sorry if I'm missing something, but isn't SwiftShader also a graphics
> > driver? At least, that's what the second page says of the PDF that
> > Luke linked. Although it says on that second page that it is a
> > graphics driver for CPUs,
>
>
> graphics driver for CPUs means software rendered since those CPUs (x86 and
> ARM) don't have any instructions specifically intended for graphics
> operations (like texture lookups or triangle rasterization HW). This is
> similar to how llvmpipe works in Mesa3d.
>
> but Libre RISC-V is a combined CPU/GPU,
> > which is why I thought it was similar to Kazan but more general
> > purpose.
> >
>
> it's more general in that it also has graphics API translators (OpenGL ES
> to Vulkan and similar).
>
> It's less performant in that it probably won't support the custom graphics
> instructions on the libre-riscv gpu.
>
>
> > By the way, I found this Phoronix article that mentions Kazan as a
> > similar effort to SwiftShader (in the last paragraph).
> >
>
> that's because Kazan used to be just intended for software rendering
> (before I joined the libre-riscv project).
>
> Jacob
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