eglantine-cirakg/src/video_core/macro_turing.h, branch nx2

nx2: replay repeated native macro calls instead of interpreting them

2026-10-29T04:27:35+00:00

Title 1 makes ~1,000,000 native macro calls a second in 3D scenes, 7 instructions each on average, and 96% repeat an earlier call exactly. A call whose effects depend only on its start, its parameters and the data RAM words it read (no MME_READ, no memory reads, no re-read of its own data RAM writes, no code upload while it ran) is remembered with those reads as guards; a later call with the same start and parameters whose guards still hold replays its data RAM and method writes. Uploading macro code clears the memo. EDEN_NX2_MME_MEMO=0 interprets every call. Checked offline against the previous interpreter on 200,000 recorded 3D-scene calls (method writes, registers and data RAM all identical, 94% replayed, 1.9x faster); in the game the macro zone fell from ~0.26 to ~0.20 us per call.

Native MME: decode each instruction once; reuse the parameter FIFO

2026-10-29T00:43:00+00:00

The Turing macro interpreter re-extracted every field of each 96-bit instruction on every execution and copied the register file per instruction; title 1's GPU thread spent about half its busy time there. Instructions are now decoded once per PC (re-decoded when their words change) and both lanes' operands are read up front instead of copying the registers. The parameter FIFO is a member instead of a vector allocated per macro call. Rendering checked unchanged on the attract loop; the GPU thread went from ~68% to ~45-50% busy.

Switch 2: per-channel MME data RAM; one QMD table for all channels

2026-10-28T17:22:59+00:00

Macro code stays shared by the channels of a process, but each channel now has its own MME data RAM. Title 1's channels keep their own QMD ring base in data word 0x27; with one shared RAM every channel used the last channel's ring, QMDs collided, releases came early or never and the GPU waited on semaphores (4 s timeouts per frame). The QMD scheduler state is one table for all channels: a QMD's dependency counter is state of the QMD, scheduled and decremented from different channels. Diagnostics: EDEN_NX2_QMD_TRACE (scheduler loads, counts, launches) and EDEN_NX2_MME_DUMP (compute macro code, calls, data word 0x27 changes).

nx2: get title 4 past the difficulty confirm

2026-10-28T04:24:14+00:00

- MME: implement MME_DMA_READ / MME_DMA_READ_FIFOED (Turing macros read query results into their load FIFO; the conditional-render macro at 0x142 needs it). - vi2 present waits up to 4 s for the frame fence (was 250 ms) so shader compile stalls don't let the game lap its equal-value gate semaphores. - Native QMD: fire the third release slot at word 52, which NVN2 patches for queue-to-queue syncs (compute queue releasing a gate the 3D queue waits on). - Compute class SET_REPORT_SEMAPHORE (0x6c0-0x6c3) releases. - Ampere lowering: AOFFI, any LOP3 truth table, STG RZ, LDG 0x981, IABS, I2FP rounding, IMAD negated addend, SHFL 0x989 (all 77 title-4 shaders lower). - Debug: EDEN_NX2_SEM_WATCH= traces acquires, releases, method arguments and compute macro emits for one semaphore block; EDEN_NX2_KEY_SCRIPT scripted key presses; per-submit logs moved to TRACE.

Switch 2: Turing macros, native compute, Ampere shader lowering, native tiling

2026-10-28T02:26:16+00:00

From changes.patch: the TU104/GA10x MME interpreter (shared macro context for the process's channels, also on the compute class), native compute with QMD 3.0 dependency scheduling, the Ampere-to-Maxwell shader lowering, native vertex stream sizes, and the console's GOB swizzle for textures, DMA copies and the host unswizzle shaders. Switch 2 channels turn all of it on at init. The lowering is widened for title 4 (all 32 of its programs lower): general TEX (any dimension/LOD/mask, operand split 1+1/2+1/2+2/4+n, any but consistent descriptor buffer), cube/array, SULD channel masks, 128-bit STG, indexed IPA, VOTE, SHFL with any immediate or predicate output, R2P/P2R byte select, uniform ULOP3/ULEA/UBREV/UFLO.SH/UISETP signed/UMOV URZ, IMNMX cbuf, IADD3 and FFMA uniform operands, FMUL /4 /8 x8, and BSSY/BSYNC/BREAK/WARPSYNC as no-ops. The capture stops at unmapped memory. EDEN_NX2_SHADER_DUMP dumps every native program; tools in C:\dev\nx2work test the lowering offline.