Question on IPA on GM107

[Fernando Sahmkow <fsahmkow27@xxxxxxxxx>]

So I'm trying to track an special value in IPA instruction generation.

https://cgit.freedesktop.org/mesa/mesa/tree/src/gallium/drivers/nouveau/codegen/nv50_ir_emit_gm107.cpp#L2561

Register on 0x14 (20) is set to some source on "insn->op == OP_PINTERP"

I have found while emulation that such value can be set sometimes to FragCoord.w, I don't however know what that value is and how to represent it on glsl. Do you guys know where does that value come from and what it means?

--

Atentamente,

Fernando A. Sahmkow

Móvil: +584242280286

Correo: fsahmkow27@xxxxxxxxx

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