chrg6
fa6f9717fb
Reach buffers through a device address table where the translator finds no storage buffer, and lower MATCH.ALL and ATOMS.POPC.INC.
...
Kokiri Forest drew black, in tiles and in shadowed and indoor areas, where shaders read light, probe and instance data through pointers they load from other buffers at an index (a phi of a pushed pointer and a loaded one, a pointer spilled to local memory): those reads returned 0. Translator patch 0030 keeps such accesses global, with a new first source naming the table, and the SPIR-V back end looks the address's 4 KiB page up in it and loads through the buffer device address it gives (PhysicalStorageBuffer64). runtime/vk_gpa.c keeps the table: two levels over the 40-bit GPU address space, page entries naming immutable records, records reused only after the GPU finished with them. Imported pools, their VRAM mirrors and the pages of virtual pools go in it; pools in it are destroyed after the submissions that may still read them. The last failing compute program needed MATCH.ALL (subgroupAllEqual) and the aggregated shared increment ATOMS.POPC.INC, now lowered in AmpereLowering.cs; Kokiri Forest translates without a failure.
NX2NAVI_GPA=0 turns the table off and NX2NAVI_GPA_EMPTY=1 keeps it empty. A first try synced every VRAM mirror at each table reader's draw, which overwrote what the GPU had written into them and made the black worse; mirrors sync only when bound.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com >
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