# SPDX-License-Identifier: AGPL-3.0-or-later
# Copyright (C) 2026 David (Corey) Herrera
# matmul_float16b_lofi.cbtable
#   Diagnostic twin of matmul_float16b.cbtable, NOT a shipped configuration. Identical in
#   every field except math_fidelity, so that a program built from this table and one
#   built from matmul_float16b.cbtable differ in EXACTLY one compile-time setting and can
#   be A/B'd on the card without any other variable moving.
#
#   Why this exists: docs/tt_bringup_log.md §16.3 found that on the six real MiniCPM5-1B
#   matmul shapes (all long-K, Kt >= 48), LoFi measures BETTER PCC and max-abs than HiFi4
#   — backwards from what less arithmetic precision should do — while on `smoke`, the one
#   short-K shape (Kt=2), the ordering is normal (HiFi4 better). That reversal was left
#   INFERRED, not measured: "probably 16-bit DST accumulation dominating rather than
#   product precision." This table is what makes it possible to hold DST_ACCUM_MODE fixed
#   (0, matching the shipped configuration) and vary ONLY fidelity across a K sweep, which
#   is the first of the two orthogonal experiments the inversion needs
#   (foundry_blackhole_backend_dev_notes.md task: "does the gap scale with K").
#
#   NEVER pointed to by build_tensix_program.sh in Makefile.ops or any shipped program
#   directory. It exists only for foundry/tt/tests/test_fidelity_sweep.c.
#
#   Format: tools/emit_tensix_cb_formats.py

math_fidelity  0
approx         0
dst_accum_mode 0

cb  0  Float16_b 32 32 16 4
cb  1  Float16_b 32 32 16 4
cb 16  Float16_b 32 32 16 4