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This opcode is responsible for setting up the buffer base address and per-thread scratch space fields of a scratch message header. For the most part, it's a copy of g0 but some messages need us to zero out g0.2 and the bottom bits of g0.5. This may actually fix a bug when nir_load/store_scratch is used. The docs say that the DWORD scattered messages respect the per-thread scratch size specified in gN.3[3:0] in the message header but we've been leaving it zero. This may mean that we've been ignoring any scratch reads/writes from a load/store_scratch intrinsic above the 1KB mark. Reviewed-by: Kenneth Graunke <kenneth@whitecape.org> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7084> |
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