 claude-noether
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746533582e
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h264: V3D shaders for the 8 diagonal qpel positions
Closes the put_ qpel QPU matrix. Adds mc11/12/13/21/23/31/32/33 —
each composes two half-pel anchor outputs via L2 rounded-average:
mc11 ¼¼ : avg(mc20[r, c], mc02[r, c])
mc12 ¼½ : avg(mc22[r, c], mc02[r, c])
mc13 ¼¾ : avg(mc20[r+1, c], mc02[r, c])
mc21 ½¼ : avg(mc22[r, c], mc20[r, c])
mc23 ½¾ : avg(mc22[r, c], mc20[r+1, c])
mc31 ¾¼ : avg(mc20[r, c], mc02[r, c+1])
mc32 ¾½ : avg(mc22[r, c], mc02[r, c+1])
mc33 ¾¾ : avg(mc20[r+1, c], mc02[r, c+1])
Per-lane structure: each lane runs the FULL cascade for BOTH anchors
at its own (r, c) target, then L2 averages. No shared memory.
Shaders inline hpel_h() / hpel_v() / hpel_hv() helpers (the latter
does the 13×6 int16 cascade per cell). ~88 lines each.
Shaders generated from a python template (POSITIONS table + format
string) — the 8 .comp files are 1:1 with the C reference's
DEFINE_DIAG_REF macro from fourier PR #18.
Dispatch plumbing: shared dispatch_h264_qpel_diag_qpu helper covers
all 8 (same src envelope as mc22: src_max = src_off + 10*stride + 11,
covering rows -2..+10 and cols -2..+10 for any (r±1, c±1) offset).
Recipe table: all 8 DAEDALUS_KERNEL_H264_QPEL_MC{11..33} flipped to
QPU. Public dispatchers re-defined via DEFINE_QPEL_DIAG_PUBLIC macro
(replaces the old DEFINE_QPEL_DISPATCH which fast-failed QPU).
Verified on hertz:
$ ./build/test_api_h264 | grep "qpel mc[1-3][1-3]"
H.264 qpel mc11: 2048/2048 bytes bit-exact (100.0000%)
H.264 qpel mc12: 2048/2048 bytes bit-exact (100.0000%)
H.264 qpel mc13: 2048/2048 bytes bit-exact (100.0000%)
H.264 qpel mc21: 2048/2048 bytes bit-exact (100.0000%)
H.264 qpel mc23: 2048/2048 bytes bit-exact (100.0000%)
H.264 qpel mc31: 2048/2048 bytes bit-exact (100.0000%)
H.264 qpel mc32: 2048/2048 bytes bit-exact (100.0000%)
H.264 qpel mc33: 2048/2048 bytes bit-exact (100.0000%)
Meaningful: the (r±1, c±1) offsets are easy to transpose between
positions; passing first try on the asymmetric variants (mc13/23/31/33)
means the position-specific shifts are correct in all 8 templates.
put_ qpel QPU matrix is now COMPLETE: 15 of 15 useful positions
(mc00 = integer copy, no shader needed). avg_ qpel positions
(15 more) remain on CPU NEON; can land as a follow-up since avg_
is just put_ + one extra L2 against existing dst.
put_ mc20 ✓ mc02 ✓ mc22 ✓ (anchors)
mc10 ✓ mc30 ✓ mc01 ✓ mc03 ✓ (single-axis ¼-pel)
mc11 ✓ mc12 ✓ mc13 ✓ (this PR — row-1 diagonals)
mc21 ✓ mc23 ✓ (this PR — row-2 diagonals)
mc31 ✓ mc32 ✓ mc33 ✓ (this PR — row-3 diagonals)
avg_ all 15 — CPU NEON
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2026-05-25 19:14:42 +02:00 |
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