# SPDX-License-Identifier: AGPL-3.0-or-later
# Copyright (C) 2026 David (Corey) Herrera
# topk_float16b.cbtable
#   The CB descriptor contract for the resident TOPK/SAMPLE program.
#
#   IT DESCRIBES ONE CB AND THE COMPUTE THREAD NEVER READS IT. That is not an oversight and
#   it is the interesting fact about this op: top-k is a scalar streaming selection between
#   two DATA-MOVEMENT processors (resident_topk_protocol.h §2), so the tile stream goes
#   BRISC -> NCRISC and no unpacker or packer is involved at any point.
#
#   The table still has to exist and still has to be right, because
#   tools/emit_tensix_cb_formats.py generates ft_tensix_cb_formats.h for the three TRISC
#   images whether they use it or not, and a CB the table does not list gets
#   DataFormat::Invalid. cb 0 is listed at the format the reader and the selector are built
#   for so the descriptor array the host writes and the descriptors the compute images were
#   compiled against agree byte for byte -- there is NO runtime check of that agreement
#   (docs/tt_kernel_model.md §11), and "the compute thread would not have noticed" is not a
#   reason to leave a contract inconsistent.
#
#   math_fidelity and dst_accum_mode are recorded rather than inherited, per §16 --
#   HiFi4 and fp32 DST, matching every other Phase 6 table. Neither reaches any instruction
#   in this program; they are here so that a future round which DOES put the SFPU to work
#   (resident_topk_compute.c names the two-stage shape and the number that would justify
#   it) starts from a stated choice instead of an emitter default.
#
#   Format: tools/emit_tensix_cb_formats.py

math_fidelity  4
approx         0
dst_accum_mode 1

cb  0  Float16_b 32 32 16 4