code/kernels/sp_desc/dn_reader.cpp

// SPDX-FileCopyrightText: © 2026 Tenstorrent USA, Inc.
// SPDX-License-Identifier: Apache-2.0
//
// Descriptor norm, PROC 0: publish the local input shard (CB_IN bound to it) and build the reduce scaler
// tile (1.0 in row 0 of each face, zeros elsewhere: ttnn's generate_reduce_scaler layout).
#include <stdint.h>
#include "api/dataflow/dataflow_api.h"

void kernel_main() {
    constexpr uint32_t cb_in = get_compile_time_arg_val(0);
    constexpr uint32_t cb_one = get_compile_time_arg_val(1);
    constexpr uint32_t NT = get_compile_time_arg_val(2);
    cb_reserve_back(cb_in, NT);
    cb_push_back(cb_in, NT);
    cb_reserve_back(cb_one, 1);
    volatile tt_l1_ptr uint32_t* p = reinterpret_cast<volatile tt_l1_ptr uint32_t*>(get_write_ptr(cb_one));
    for (uint32_t i = 0; i < 512; ++i) {
        p[i] = 0;
    }
    for (uint32_t f = 0; f < 4; ++f) {
        for (uint32_t j = 0; j < 8; ++j) {
            p[f * 128 + j] = 0x3F803F80u;
        }
    }
    (void)p[511];
    cb_push_back(cb_one, 1);
}