r300: use RC registers directly in nir_to_rc

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Remove the temporary ntr_src/ntr_dst representation by translating NIR
sources and destinations straight to backend rc_src_register and
rc_dst_register values.

Keep the NIR translator instruction state in backend rc_sub_instruction
form as well, so this path no longer has to stage ureg-shaped registers
before emitting backend instructions.

The only slightly ugly part is saturate, since in the backend its not a
dst parameter, but it rather belongs to the instruction.

Assisted-by: Codex (GPT-5.5)
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/41577>

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Pavel Ondračka 2026-05-07 19:38:35 +02:00 • committed by Marge Bot

parent 2b417a0183

commit bc89b448c9

1 changed files with 349 additions and 345 deletions

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src/gallium/drivers/r300/compiler/nir_to_rc.c

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