Dusk/WeirdUtils
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48e542dcf4043a86c3f39556304a1a4e07f99a83
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14 Commits
Author SHA1 Message Date
MarcelineVQ 48e542dcf4 silicon_sse: packParticleColor 26cy->16cy (6.3x) via packed V4 round+convert; checkBoxLineIntersect branchless @min/@max cleanup; all tasks complete 2026-03-17 02:31:01 -07:00
MarcelineVQ 741d44c973 silicon_sse: FSINCOS tested (slower), normalizeVec3/translateBoundingVol/createRotMat3x4 documented at optimum 2026-03-17 02:24:56 -07:00
MarcelineVQ 350cd93162 silicon_sse: normalizeVec3InPlace + testSphereFrustum at optimum, documented attempts 2026-03-17 02:06:08 -07:00
MarcelineVQ d1c3c4654f silicon_sse: batched testOBBFrustum 79cy->43cy (2.3x), 4-corner V4 dots + branchless mask 2026-03-17 01:49:37 -07:00
MarcelineVQ 9715e32ed7 silicon_sse: mulMat3x4InPlace eliminate tmp copy + preload b (1.7x -> 1.8x) 2026-03-17 01:47:13 -07:00
MarcelineVQ 9f2fa5213a bench: best-of-5 for all silicon functions; silicon_sse: V4 column mulMat3x4/InPlace (1.8x/1.7x) 2026-03-17 01:43:16 -07:00
MarcelineVQ 662c854376 silicon_sse: patch-in-place isPointInsideBounds 6cy->5cy (1.2x), naked vucomiss 2026-03-17 01:26:55 -07:00
MarcelineVQ 16f1a073ae silicon_sse: branchless classifyPointFrustum 35cy->30cy (1.8x), revert addToColorAccum 2026-03-17 01:17:23 -07:00
MarcelineVQ cb0888e0fa silicon_sse: naked FMA asm for vec3Dot (0.4x->0.8x) and distanceToPlane (0.7x->1.0x) 2026-03-17 01:01:07 -07:00
MarcelineVQ 9488fb568c silicon_sse: V4/@mulAdd/@shuffle rewrites for all functions 
Major improvements from SSE4.1+FMA+AVX target + explicit SIMD:
- transposeMat4x4: 0.9x -> 2.4x (V4 shuffle)
- rotateMatByQuat: 4.0x -> 5.0x (V4 matmul)
- testOBBFrustum: 0.9x -> 1.2x (V4 corner transform + dot4)
- classifyPointFrustum: 1.4x -> 2.0x (V4 dot4 with {x,y,z,1} trick)
- translateBoundingVol: 1.3x -> 1.7x (@mulAdd plane distances)
- testSphereFrustum: 1.1x -> 1.3x (V4 dot)
- createRotMat3x4: @mulAdd for all 9 matrix entries
- mulMat3x4/InPlace: @mulAdd chains
- quatSlerp: V4 blend + @mulAdd dot
- addVec3ToAccumulator: @mulAdd for scale multiply

All parity tests pass.
 2026-03-17 00:34:12 -07:00
MarcelineVQ 8537587df3 silicon: si_ftol SSE3 FISTTP replacement, bench patch-in-place framework 
si_ftol: 9-byte naked asm using FISTTP (SSE3 truncate-from-x87) replaces
the 39-byte FSTCW/FLDCW/FISTP rounding mode dance. 4 vs 7 cycles (1.7x).
13.2M calls/7.5s in-game -- ~13ms savings per period.

Benchmark: patch-in-place at mapped 0x40A2B0, test parity across 19 values,
best-of-5 timing with varying inputs. Framework for all silicon functions.

Also disabled h67 (ConvertPixelsToScreenAlt) probe -- game passes ECX=0
as valid input, thiscall probe crashes on null this.
 2026-03-17 00:22:07 -07:00
MarcelineVQ c9249c6c96 bench: fix 3 correctness bugs found by benchmarker 
mulMat3x4 / mulMat3x4InPlace: translation row had A*B operands swapped.
Original computes A_translation * B_rotation + B_translation, but our
code was doing A_rotation * B_translation + A_translation. Verified by
tracing x87 disassembly: first element loads A[9]*B[col] pattern.
Fixed in both silicon_sse.zig and silicon.zig.

packParticleColor: x87 rounds 127.5 to 128 (round-to-nearest), but SSE
@intFromFloat truncates to 127. Added @round() before @intFromFloat.

42/42 benchmarks now pass correctness. 0 MISMATCHes.
 2026-03-15 12:27:59 -07:00
MarcelineVQ 7c88423a41 bench: add remaining silicon functions, total 38 benchmarks 
Added 8 more silicon SSE functions to benchmark: normalizeVec3,
testOBBFrustum, calculateSinCos, translateBoundingVol, addToColorAccum,
packParticleColor, setParticleAlpha, and addVec3ToAccumulator (export fn).

Notable results from new entries:
  packParticleColor: 6.8x (109->16) MISMATCH -- alpha byte diff
  setParticleAlpha:  3.4x (24->7)
  calculateSinCos:   3.0x (138->45)
  normalizeVec3:     1.8x (18->10)
  testOBBFrustum:    1.3x (107->81)

3 MISMATCHes total (mulMat3x4, mulMat3x4InPlace, packParticleColor)
need correctness investigation -- likely matrix layout and struct
byte-order differences.
 2026-03-15 12:08:59 -07:00
MarcelineVQ 55b4931fcb bench: map WoW PE sections for full-fidelity benchmarking, add silicon SSE 
Major bench harness upgrade:
- Maps WoW .text (4MB) and .rdata (160KB) at original virtual addresses
  instead of individual function byte arrays. All CALL targets and float
  constants resolve automatically -- no more manual mapGameConstants().
- Bench binary linked at 0x10000000 to avoid address conflict with WoW
  PE sections at 0x400000-0xD00000.

Added silicon_sse.zig: 18 pure math functions extracted from silicon.zig
as export fn (C ABI) for standalone compilation. Covers frustum culling,
bounding volume ops, quaternion slerp, matrix multiplies, trig, etc.

Silicon benchmark results (all 14 new entries pass correctness):
  checkBoxLineIntersect: 3.2x (72->22)  -- slab AABB intersection
  rotateMatByQuat:       3.1x (172->54) -- quat->mat + mat multiply
  quatSlerp:             2.5x (454->178)
  createZRotMat3x3:      2.5x (140->55)
  createRotMat3x4:       2.2x (163->73)
  normalizeVec3InPlace:  1.8x (34->18)
  mulMat3x4InPlace:      1.6x (106->66) -- MISMATCH (layout diff, needs investigation)
  classifyPointFrustum:  1.5x (60->40)
  mulMat3x4:             1.2x (64->52)  -- MISMATCH (same layout issue)

Two MISMATCH entries on mat3x4 multiply -- likely row/column order
difference between original and our implementation. Correctness needs
verification against game behavior.
 2026-03-15 12:04:02 -07:00