actlib_dataflow_neuro/dataflow_neuro/chips.act

/*************************************************************************
 *
 *  This file is part of ACT dataflow neuro library
 *
 *  Copyright (c) 2022 University of Groningen - Ole Richter
 *  Copyright (c) 2022 University of Groningen - Michele Mastella
 *  Copyright (c) 2022 University of Groningen - Hugh Greatorex
 *  Copyright (c) 2022 University of Groningen - Madison Cotteret
 * 
 *
 *  This source describes Open Hardware and is licensed under the CERN-OHL-W v2 or later
 *
 *  You may redistribute and modify this documentation and make products
 *  using it under the terms of the CERN-OHL-W v2 (https:/cern.ch/cern-ohl).
 *  This documentation is distributed WITHOUT ANY EXPRESS OR IMPLIED
 *  WARRANTY, INCLUDING OF MERCHANTABILITY, SATISFACTORY QUALITY
 *  AND FITNESS FOR A PARTICULAR PURPOSE. Please see the CERN-OHL-W v2
 *  for applicable conditions.
 *
 *  Source location: https://git.web.rug.nl/bics/actlib_dataflow_neuro
 *
 *  As per CERN-OHL-W v2 section 4.1, should You produce hardware based on
 *  these sources, You must maintain the Source Location visible in its
 *  documentation.
 *
 **************************************************************************
 */


import "../../dataflow_neuro/cell_lib_async.act";
import "../../dataflow_neuro/cell_lib_std.act";
import "../../dataflow_neuro/treegates.act";
import "../../dataflow_neuro/primitives.act";
import "../../dataflow_neuro/registers.act";
import "../../dataflow_neuro/coders.act";
import "../../dataflow_neuro/interfaces.act";
// import tmpl::dataflow_neuro;
// import tmpl::dataflow_neuro;
import std::channel;
open std::channel;

namespace tmpl {
    namespace dataflow_neuro {


export template<pint N_IN,  // Size of input data from outside world
N_NRN_X, N_NRN_Y, N_SYN_X, N_SYN_Y, // Number of neurons / synapses
NC_NRN_X, NC_NRN_Y, NC_SYN_X, NC_SYN_Y,
N_SYN_DLY_CFG,
N_NRN_MON_X, N_NRN_MON_Y, N_SYN_MON_X, N_SYN_MON_Y,
N_MON_AMZO_PER_SYN, N_MON_AMZO_PER_NRN, // Number of signals that each synapse outputs to be monitored.
N_FLAGS_PER_SYN, N_FLAGS_PER_NRN, // Number of signals that each nrn/syn recieves from the register.
N_BUFFERS,
N_LINE_PD_DLY, // Number of dummy delays to add line pull down
REG_NCA, REG_NCW, REG_M>

defproc texel_core (avMx1of2<N_IN> in, out;
    Mx1of2<REG_NCW> reg_data[REG_M];

    // Dummy synapses and neurons in the handshake blocks
    // should be removed pre-innovus, else they are floating.
    // a1of1 synapses[N_SYN_X * N_SYN_Y];
    // a1of1 neurons[N_NRN_X * N_NRN_Y];

    // Synapse decoder stuff
    // The analogue core and connects to these to replace the above synapses.
    bool! dec_req_x[N_SYN_X], dec_req_y[N_SYN_Y];
    bool? dec_ackB[N_SYN_X];
    a1of1 syn_pu[N_SYN_X];

    // Neuron encoder stuff
    a1of1 enc_inx[N_NRN_X], enc_iny[N_NRN_Y];
    a1of1 nrn_pd_x[N_NRN_X], nrn_pd_y[N_NRN_Y];

    // Monitors and flags to/from core, and selected mon out.
    bool! nrn_mon_x[N_NRN_MON_X], nrn_mon_y[N_NRN_MON_Y];
    bool! syn_mon_x[N_SYN_MON_X], syn_mon_y[N_SYN_MON_Y];
    bool? syn_mon_AMZI[N_SYN_X * N_MON_AMZO_PER_SYN], nrn_mon_AMZI[N_NRN_X * N_MON_AMZO_PER_NRN];
    bool! syn_mon_AMZO[N_MON_AMZO_PER_SYN], nrn_mon_AMZO[N_MON_AMZO_PER_NRN];
    bool! syn_flags_EFO[N_FLAGS_PER_SYN], nrn_flags_EFO[N_FLAGS_PER_NRN];

    power supply;
    bool? reset_B, reset_reg_B, reset_syn_stge_BI;
    bool! reset_nrn_hs_BO[N_NRN_X], reset_syn_hs_BO[N_SYN_X],
    reset_nrn_stge_BO[N_NRN_X], reset_syn_stge_BO[N_SYN_X]){

    bool _reset_BX;
    BUF_X12 reset_buf(.a = reset_B, .y = _reset_BX, .vdd = supply.vdd, .vss = supply.vss);

    pint index = 0; // Just useful

    // Onwards
    fifo<N_IN,N_BUFFERS> fifo_in(.in = in, .reset_B = _reset_BX, .supply = supply);
    demux_bit_msb<N_IN-1> _demux(.in = fifo_in.out, .reset_B = _reset_BX, .supply = supply);

    // Register
    fifo<N_IN-1,N_BUFFERS> fifo_dmx2reg(.in = _demux.out2, .reset_B = _reset_BX, .supply = supply);
    register_wr_array<REG_NCA, REG_NCW, REG_M> register(.in = fifo_dmx2reg.out, .data = reg_data,
        .supply = supply, .reset_B = reset_reg_B);
    fifo<N_IN-2,N_BUFFERS> fifo_reg2mrg(.in = register.out, .reset_B = _reset_BX, .supply = supply);


    // Spike Decoder
    pint NC_SYN;
    NC_SYN = NC_SYN_X + NC_SYN_Y;
    slice_data<N_IN-1, 0, NC_SYN> slice_pre_dec(.in = _demux.out1, .supply = supply);
    fifo<NC_SYN,N_BUFFERS> fifo_dmx2dec(.in = slice_pre_dec.out, .reset_B = _reset_BX, .supply = supply);
    decoder_2d_hybrid<NC_SYN_X, NC_SYN_Y, N_SYN_X, N_SYN_Y, N_SYN_DLY_CFG> decoder(.in = fifo_dmx2dec.out,
        .hs_en = register.data[0].d[0].t, // Defaults to handshake disable
        .ack_disable = register.data[1].d[2].t, // Defaults to ack enabled
        .out_req_x = dec_req_x, .out_req_y = dec_req_y,
        .to_pu = syn_pu,
        .in_ackB_decoder = dec_ackB,
        .supply = supply, .reset_B = _reset_BX);
    INV_X1 dly_cfg_inverters[N_SYN_DLY_CFG]; 
    (i:N_SYN_DLY_CFG:
        dly_cfg_inverters[i].a = register.data[0].d[1+i].t; // iff t is high, is the delay disabled.
        dly_cfg_inverters[i].vdd = supply.vdd;
        dly_cfg_inverters[i].vss = supply.vss;
        decoder.dly_cfg[i] = dly_cfg_inverters[i].y;
    )

    // Synapse handshake circuits, to be removed for innovus
    // decoder_2d_synapse_hs<N_SYN_X, N_SYN_Y> _synapses(
    //     .synapses = synapses,
    //     .in_req_x = dec_req_x, .in_req_y = dec_req_y,
    //     .to_pu = syn_pu,
    //     .out_ackB_decoder = dec_ackB,
    //     .supply = supply);

    // Neurons + encoder
    pint NC_NRN;
    NC_NRN = NC_NRN_X + NC_NRN_Y;
    encoder2d_simple<NC_NRN_X, NC_NRN_Y, N_NRN_X, N_NRN_Y, N_LINE_PD_DLY> encoder(
        .inx = enc_inx, .iny = enc_iny,
        .reset_B = _reset_BX, .supply = supply,
        .to_pd_x = nrn_pd_x, .to_pd_y = nrn_pd_y);
    fifo<NC_NRN, N_BUFFERS> fifo_enc2mrg(.in = encoder.out,
        .reset_B = _reset_BX, .supply = supply);

    // Neuron handshake circuits, to be removed for innovus
    // nrn_hs_2d_array<N_NRN_X,N_NRN_Y> nrn_grid(.in = neurons,
    //     .outx = enc_inx, .outy = enc_iny,
    //     .to_pd_x = nrn_pd_x, .to_pd_y = nrn_pd_y,
    //     .supply = supply, .reset_B = _reset_BX);



    // Merge
    append<NC_NRN, N_IN-NC_NRN, 0> append_enc(.in = fifo_enc2mrg.out, .supply = supply);
    append<N_IN-2, 2, 2> append_reg(.in = fifo_reg2mrg.out, .supply = supply);
    merge<N_IN> merge_enc8reg(.in1 = append_enc.out, .in2 = append_reg.out,
        .supply = supply, .reset_B = _reset_BX);


    // Output
    fifo<N_IN, N_BUFFERS> fifo_out(.in = merge_enc8reg.out, .out = out,
        .reset_B = _reset_BX, .supply = supply);


    // Neuron/synapse monitor targeters
    pint NC_NRN_MON_X = std::ceil_log2(N_NRN_MON_X);
    pint NC_NRN_MON_Y = std::ceil_log2(N_NRN_MON_Y);
    pint NC_SYN_MON_X = std::ceil_log2(N_SYN_MON_X);
    pint NC_SYN_MON_Y = std::ceil_log2(N_SYN_MON_Y);

    decoder_dualrail_en<NC_NRN_MON_X, N_NRN_MON_X> nrn_mon_dec_x(.supply = supply);
    nrn_mon_dec_x.en = register.data[1].d[0].t;
    (i:NC_NRN_MON_X:
        nrn_mon_dec_x.in.d[i] = register.data[2].d[i];
    )
    sigbuf_boolarray<N_NRN_MON_X, 13> nrn_mon_x_buf(.in = nrn_mon_dec_x.out, .out = nrn_mon_x, .supply = supply);

    decoder_dualrail_en<NC_NRN_MON_Y, N_NRN_MON_Y> nrn_mon_dec_y(.supply = supply);
    nrn_mon_dec_y.en = register.data[1].d[0].t;
    (i:NC_NRN_MON_Y:
        nrn_mon_dec_y.in.d[i] = register.data[2].d[i+NC_NRN_MON_X];
    )
    sigbuf_boolarray<N_NRN_MON_Y, 48> nrn_mon_y_buf(.in = nrn_mon_dec_y.out, .out = nrn_mon_y, .supply = supply);

    decoder_dualrail_en<NC_SYN_MON_X, N_SYN_MON_X> syn_mon_dec_x(
        .supply = supply);
    syn_mon_dec_x.en = register.data[1].d[1].t;
    (i:NC_SYN_MON_X:
        syn_mon_dec_x.in.d[i] = register.data[3].d[i];
    )
    sigbuf_boolarray<N_SYN_MON_X, 13> syn_mon_x_buf(.out = syn_mon_x, .supply = supply);

    decoder_dualrail_en<NC_SYN_MON_Y, N_SYN_MON_Y> syn_mon_dec_y(.supply = supply);
    syn_mon_dec_y.en = register.data[1].d[1].t;
    (i:NC_SYN_MON_Y:
        syn_mon_dec_y.in.d[i] = register.data[3].d[i+NC_SYN_MON_X];
    )
    sigbuf_boolarray<N_SYN_MON_Y, 48> syn_mon_y_buf(.out = syn_mon_y, .in = syn_mon_dec_y.out, .supply = supply);

    // Device debug hard-wired safety (reg0, b05 = DEV_DEBUG)
    // Stops the possibility of dev_mon being high while some other sig is high.
    // Otherwise boom.
    // Also the 4th monitor line to each synapse is active LOW, needs inverter.
    bool DEV_DEBUG;
    pint NSMX4 = N_SYN_MON_X/4; // Self explanatory
    sigbuf<std::max(NSMX4,4)> sb_DEV_DEBUG(.in = register.data[0].d[5].t,
        .supply = supply);
    DEV_DEBUG = sb_DEV_DEBUG.out[0];
    INV_X1 syn_targ_set_high_inv[NSMX4];
    [NSMX4 >= 1 ->
        AND2_X1 ands_devmon[NSMX4];
        (i:NSMX4:
            ands_devmon[i].a = syn_mon_dec_x.out[1+i*4];
            ands_devmon[i].b = DEV_DEBUG;
            ands_devmon[i].y = syn_mon_x_buf.in[1+i*4];
            ands_devmon[i].vdd = supply.vdd;
            ands_devmon[i].vss = supply.vss;

            syn_targ_set_high_inv[i].a = syn_mon_dec_x.out[3+i*4];
            syn_targ_set_high_inv[i].y = syn_mon_x_buf.in[3+i*4];
            syn_targ_set_high_inv[i].vdd = supply.vdd;
            syn_targ_set_high_inv[i].vss = supply.vss;

        )
        // Wire up the remaining lines.
        (i:N_SYN_MON_X:
            [(~(i%4 = 1)) & (~(i%4=3))->
                syn_mon_x_buf.in[i] = syn_mon_dec_x.out[i];
            ]
        )
    ]

    // Create TBUFs for each synapse column,
    // ctrl wired to mon line (first in each 4).
    TBUF_X4 syn_x_AMZI_tbuf[N_SYN_X * N_MON_AMZO_PER_SYN];
    KEEP syn_AMZO_keeps[N_MON_AMZO_PER_SYN];
    sigbuf_boolarray<N_MON_AMZO_PER_SYN, 40> syn_mon_AMZO_sb(.out = syn_mon_AMZO, .supply = supply);
    (j:N_MON_AMZO_PER_SYN:
        (i:N_SYN_X:
            index = i*N_MON_AMZO_PER_SYN + j;
            syn_x_AMZI_tbuf[index].a = syn_mon_AMZI[index];
            syn_x_AMZI_tbuf[index].en = syn_mon_x[i*4];
            syn_x_AMZI_tbuf[index].y = syn_mon_AMZO_sb.in[j];
        )

        syn_AMZO_keeps[j].y = syn_mon_AMZO_sb.in[j];
        syn_AMZO_keeps[j].vdd = supply.vdd;
        syn_AMZO_keeps[j].vss = supply.vss;

    )


    // Create TBUFs for each neuron column, and add keeps.
    // ctrl wired to mon line (first in each 4).
    TBUF_X4 nrn_x_AMZI_tbuf[N_NRN_X * N_MON_AMZO_PER_NRN];
    KEEP nrn_AMZO_keeps[N_MON_AMZO_PER_NRN];
    sigbuf_boolarray<N_MON_AMZO_PER_NRN, 40> nrn_mon_AMZO_sb(.out = nrn_mon_AMZO, .supply = supply); 
    (j:N_MON_AMZO_PER_NRN:
        (i:N_NRN_X:
            index = i*N_MON_AMZO_PER_NRN + j;
            nrn_x_AMZI_tbuf[index].a = nrn_mon_AMZI[index];
            nrn_x_AMZI_tbuf[index].en = nrn_mon_x[i*2];
            nrn_x_AMZI_tbuf[index].y = nrn_mon_AMZO_sb.in[j];
        )

        nrn_AMZO_keeps[j].y = nrn_mon_AMZO_sb.in[j];
        nrn_AMZO_keeps[j].vdd = supply.vdd;
        nrn_AMZO_keeps[j].vss = supply.vss;

    )

    // Create buffered signals from register to nrns.
    sigbuf_boolarray<N_FLAGS_PER_NRN, 31> sb_nrn_EFO(.out = nrn_flags_EFO, .supply = supply);
    (i:N_FLAGS_PER_NRN:
        sb_nrn_EFO.in[i] = register.data[5].d[i].t;
    )

    // Create  buffered signals from register to synapses.
    // Includes safety on the first 3 flags with dev mon.
    sigbuf_boolarray<N_FLAGS_PER_SYN, 31> sb_syn_EFO(.out = syn_flags_EFO, .supply = supply);
    (i:3..N_FLAGS_PER_SYN-1:
        sb_syn_EFO.in[i] = register.data[4].d[i].t;
    )  
    AND2_X1 syn_flags_dev_safety[3];
    (i:0..2:
        syn_flags_dev_safety[i].a = register.data[4].d[i].t; // syn flag bit
        syn_flags_dev_safety[i].b = register.data[0].d[5].f; // no device is being monitored.
        sb_syn_EFO.in[i] = syn_flags_dev_safety[i].y;

        syn_flags_dev_safety[i].vdd = supply.vdd;
        syn_flags_dev_safety[i].vss = supply.vss;
    )

    // Create non-buffered reset signals for the neuron/syn handshakes
    // Since sigs are buffered before each neuron.
    sigbuf<N_SYN_X> rsb_syn_hs(.in = _reset_BX, .out = reset_syn_hs_BO, .supply = supply);
    sigbuf<N_NRN_X> rsb_nrn_hs(.in = _reset_BX, .out = reset_nrn_hs_BO, .supply = supply);
    sigbuf<N_SYN_X> rsb_syn_storage(.in = reset_syn_stge_BI, .out = reset_syn_stge_BO, .supply = supply);
    INV_X1 nrn_reset_stge_inv(.a = register.data[0].d[6].t, .vdd = supply.vdd, .vss = supply.vss);
    sigbuf<N_NRN_X> rsb_nrn_storage(.in = nrn_reset_stge_inv.y, .out = reset_nrn_stge_BO, .supply = supply);

}




export template<pint N_IN,	// Size of input data from outside world
N_NRN_X, N_NRN_Y, N_SYN_X, N_SYN_Y, // Number of neurons / synapses
NC_NRN_X, NC_NRN_Y, NC_SYN_X, NC_SYN_Y,
N_SYN_DLY_CFG,
N_NRN_MON_X, N_NRN_MON_Y, N_SYN_MON_X, N_SYN_MON_Y,
N_MON_AMZO_PER_SYN, N_MON_AMZO_PER_NRN, // Number of signals that each synapse outputs to be monitored.
N_FLAGS_PER_SYN, N_FLAGS_PER_NRN, // Number of signals that each nrn/syn recieves from the register.
N_BUFFERS,
N_LINE_PD_DLY, // Number of dummy delays to add line pull down
N_BD_DLY_CFG, N_BD_DLY_CFG2,
REG_NCA, REG_NCW, REG_M>

defproc texel_singlecore (bd<N_IN> in, out;
	Mx1of2<REG_NCW> reg_data[REG_M];
	// a1of1 synapses[N_SYN_X * N_SYN_Y];
	// a1of1 neurons[N_NRN_X * N_NRN_Y];
    
    bool! nrn_mon_x[N_NRN_MON_X], nrn_mon_y[N_NRN_MON_Y];
    bool! syn_mon_x[N_SYN_MON_X], syn_mon_y[N_SYN_MON_Y];
    bool? syn_mon_AMZI[N_SYN_X * N_MON_AMZO_PER_SYN], nrn_mon_AMZI[N_NRN_X * N_MON_AMZO_PER_NRN];
    bool! syn_mon_AMZO[N_MON_AMZO_PER_SYN], nrn_mon_AMZO[N_MON_AMZO_PER_NRN];
    bool! syn_flags_EFO[N_FLAGS_PER_SYN], nrn_flags_EFO[N_FLAGS_PER_NRN];

	bool? bd_dly_cfg[N_BD_DLY_CFG], bd_dly_cfg2[N_BD_DLY_CFG2];
	bool? loopback_en;
	power supply;
	bool? reset_B){

    bool _reset_BX;
    BUF_X12 reset_buf(.a = reset_B, .y = _reset_BX, .vdd = supply.vdd, .vss = supply.vss);

    pint index = 0; // Just useful

	bd2qdi<N_IN, N_BD_DLY_CFG, N_BD_DLY_CFG2> _bd2qdi(.in = in, .dly_cfg = bd_dly_cfg, .dly_cfg2 = bd_dly_cfg2,
        .reset_B = _reset_BX, .supply = supply);
	fifo<N_IN,N_BUFFERS> fifo_in2fork(.in = _bd2qdi.out, .reset_B = _reset_BX, .supply = supply);

	fork<N_IN> _fork(.in = fifo_in2fork.out, .reset_B = _reset_BX, .supply = supply);

	// Loopback
	fifo<N_IN,N_BUFFERS> fifo_fork2drop(.in = _fork.out1, .reset_B = _reset_BX, .supply = supply);
	dropper_static<N_IN, false> _loopback_dropper(.in = fifo_fork2drop.out, .cond = loopback_en,
		.supply = supply);
    fifo<N_IN,N_BUFFERS> fifo_drop2mrg(.in = _loopback_dropper.out, .reset_B = _reset_BX, .supply = supply);


	// Onwards to core
	fifo<N_IN,N_BUFFERS> fifo_fork2core(.in = _fork.out2, .reset_B = _reset_BX, .supply = supply);

    texel_core<N_IN,N_NRN_X, N_NRN_Y, N_SYN_X, N_SYN_Y,NC_NRN_X, NC_NRN_Y, NC_SYN_X, NC_SYN_Y,N_SYN_DLY_CFG,N_NRN_MON_X, N_NRN_MON_Y, N_SYN_MON_X, N_SYN_MON_Y,N_MON_AMZO_PER_SYN, N_MON_AMZO_PER_NRN,N_FLAGS_PER_SYN, N_FLAGS_PER_NRN,N_BUFFERS,N_LINE_PD_DLY, REG_NCA, REG_NCW, REG_M>
        core(.in = fifo_fork2core.out,
            .reg_data = reg_data,
            // .synapses = synapses,
            // .neurons = neurons,
            .nrn_mon_x = nrn_mon_x, .nrn_mon_y = nrn_mon_y,
            .syn_mon_x = syn_mon_x, .syn_mon_y = syn_mon_y,
            .syn_mon_AMZI = syn_mon_AMZI, .nrn_mon_AMZI = nrn_mon_AMZI,
            .syn_mon_AMZO = syn_mon_AMZO, .nrn_mon_AMZO = nrn_mon_AMZO,
            .syn_flags_EFO = syn_flags_EFO, .nrn_flags_EFO = nrn_flags_EFO,

            .reset_B = _reset_BX,
            .supply = supply
            );

    // qdi2bd
    fifo<N_IN, N_BUFFERS> fifo_core2mrg(.in = core.out,
        .reset_B = _reset_BX, .supply = supply);
    

    // merge core output and loopback
    merge<N_IN> merge_drop8core(.in1 = fifo_core2mrg.out, .in2 = fifo_drop2mrg.out,
        .supply = supply, .reset_B = _reset_BX);


    qdi2bd<N_IN, N_BD_DLY_CFG> _qdi2bd(.in = merge_drop8core.out, .out = out, .dly_cfg = bd_dly_cfg,
        .reset_B = _reset_BX, .supply = supply);




}



export template<pint N_IN,  // Size of input data from outside world
N_NRN_X, N_NRN_Y, N_SYN_X, N_SYN_Y, // Number of neurons / synapses
NC_NRN_X, NC_NRN_Y, NC_SYN_X, NC_SYN_Y,
N_SYN_DLY_CFG,
N_NRN_MON_X, N_NRN_MON_Y, N_SYN_MON_X, N_SYN_MON_Y,
N_MON_AMZO_PER_SYN, N_MON_AMZO_PER_NRN, // Number of signals that each synapse outputs to be monitored.
N_FLAGS_PER_SYN, N_FLAGS_PER_NRN, // Number of signals that each nrn/syn recieves from the register.
N_BUFFERS,
N_LINE_PD_DLY, // Number of dummy delays to add line pull down
N_BD_DLY_CFG, N_BD_DLY_CFG2,
REG_NCA, REG_NCW, REG_M>
defproc texel_dualcore (bd<N_IN> in, out;

    Mx1of2<REG_NCW> c1_reg_data[REG_M];
    
    bool! c1_dec_req_x[N_SYN_X], c1_dec_req_y[N_SYN_Y];
    bool? c1_dec_ackB[N_SYN_X];
    a1of1 c1_syn_pu[N_SYN_X];

    a1of1 c1_enc_inx[N_NRN_X], c1_enc_iny[N_NRN_Y];
    a1of1 c1_nrn_pd_x[N_NRN_X], c1_nrn_pd_y[N_NRN_Y];

    bool! c1_nrn_mon_x[N_NRN_MON_X], c1_nrn_mon_y[N_NRN_MON_Y];
    bool! c1_syn_mon_x[N_SYN_MON_X], c1_syn_mon_y[N_SYN_MON_Y];
    bool? c1_syn_mon_AMZI[N_SYN_X * N_MON_AMZO_PER_SYN], c1_nrn_mon_AMZI[N_NRN_X * N_MON_AMZO_PER_NRN];
    bool! c1_syn_mon_AMZO[N_MON_AMZO_PER_SYN], c1_nrn_mon_AMZO[N_MON_AMZO_PER_NRN];
    bool! c1_syn_flags_EFO[N_FLAGS_PER_SYN], c1_nrn_flags_EFO[N_FLAGS_PER_NRN];

    bool! c1_reset_nrn_hs_BO[N_NRN_X], c1_reset_syn_hs_BO[N_SYN_X],
    c1_reset_nrn_stge_BO[N_NRN_X], c1_reset_syn_stge_BO[N_SYN_X];

    Mx1of2<REG_NCW> c2_reg_data[REG_M];

    bool! c2_dec_req_x[N_SYN_X], c2_dec_req_y[N_SYN_Y];
    bool? c2_dec_ackB[N_SYN_X];
    a1of1 c2_syn_pu[N_SYN_X];

    a1of1 c2_enc_inx[N_NRN_X], c2_enc_iny[N_NRN_Y];
    a1of1 c2_nrn_pd_x[N_NRN_X], c2_nrn_pd_y[N_NRN_Y];

    bool! c2_nrn_mon_x[N_NRN_MON_X], c2_nrn_mon_y[N_NRN_MON_Y];
    bool! c2_syn_mon_x[N_SYN_MON_X], c2_syn_mon_y[N_SYN_MON_Y];
    bool? c2_syn_mon_AMZI[N_SYN_X * N_MON_AMZO_PER_SYN], c2_nrn_mon_AMZI[N_NRN_X * N_MON_AMZO_PER_NRN];
    bool! c2_syn_mon_AMZO[N_MON_AMZO_PER_SYN], c2_nrn_mon_AMZO[N_MON_AMZO_PER_NRN];
    bool! c2_syn_flags_EFO[N_FLAGS_PER_SYN], c2_nrn_flags_EFO[N_FLAGS_PER_NRN];

    bool! c2_reset_nrn_hs_BO[N_NRN_X], c2_reset_syn_hs_BO[N_SYN_X],
    c2_reset_nrn_stge_BO[N_NRN_X], c2_reset_syn_stge_BO[N_SYN_X];
    
    bool? bd_dly_cfg[N_BD_DLY_CFG], bd_dly_cfg2[N_BD_DLY_CFG2];
    bool? loopback_en;
    power supply;
    bool? reset_B, reset_reg_B, reset_syn_stge_BI
    ){

    // Reset buffers
    bool _reset_BX;
    BUF_X12 reset_buf(.a = reset_B, .y = _reset_BX, .vdd = supply.vdd, .vss = supply.vss);

    bd2qdi<N_IN, N_BD_DLY_CFG, N_BD_DLY_CFG2> _bd2qdi(.in = in, .dly_cfg = bd_dly_cfg, .dly_cfg2 = bd_dly_cfg2,
        .reset_B = _reset_BX, .supply = supply);
    fifo<N_IN,N_BUFFERS> fifo_in2fork(.in = _bd2qdi.out, .reset_B = _reset_BX, .supply = supply);

    fork<N_IN> _fork(.in = fifo_in2fork.out, .reset_B = _reset_BX, .supply = supply);

    // Loopback
    fifo<N_IN,N_BUFFERS> fifo_fork2drop(.in = _fork.out1, .reset_B = _reset_BX, .supply = supply);
    dropper_static<N_IN, false> _loopback_dropper(.in = fifo_fork2drop.out, .cond = loopback_en,
        .supply = supply);
    fifo<N_IN,N_BUFFERS> fifo_drop2mrg(.in = _loopback_dropper.out, .reset_B = _reset_BX, .supply = supply);


    // Onwards to core demux
    fifo<N_IN,N_BUFFERS> fifo_fork2dmx(.in = _fork.out2, .reset_B = _reset_BX, .supply = supply);
    demux_bit_msb<N_IN-1> core_dmx(.in = fifo_fork2dmx.out, .reset_B = _reset_BX, .supply = supply);
    fifo<N_IN-1,N_BUFFERS> fifo_dmx2core1(.in = core_dmx.out1, .reset_B = _reset_BX, .supply = supply);
    fifo<N_IN-1,N_BUFFERS> fifo_dmx2core2(.in = core_dmx.out2, .reset_B = _reset_BX, .supply = supply);

    // Cores
    texel_core<N_IN-1,N_NRN_X, N_NRN_Y, N_SYN_X, N_SYN_Y,NC_NRN_X, NC_NRN_Y, NC_SYN_X, NC_SYN_Y,N_SYN_DLY_CFG,N_NRN_MON_X, N_NRN_MON_Y, N_SYN_MON_X, N_SYN_MON_Y,N_MON_AMZO_PER_SYN, N_MON_AMZO_PER_NRN,N_FLAGS_PER_SYN, N_FLAGS_PER_NRN,N_BUFFERS,N_LINE_PD_DLY, REG_NCA, REG_NCW, REG_M>
        core1(.in = fifo_dmx2core1.out,

            .reg_data = c1_reg_data,
            // .synapses = c1_synapses,
            // .neurons = c1_neurons,

            .dec_req_x = c1_dec_req_x, .dec_req_y = c1_dec_req_y,
            .dec_ackB = c1_dec_ackB,
            .syn_pu = c1_syn_pu,

            .enc_inx = c1_enc_inx, .enc_iny = c1_enc_iny,
            .nrn_pd_x = c1_nrn_pd_x, .nrn_pd_y = c1_nrn_pd_y,

            .nrn_mon_x = c1_nrn_mon_x, .nrn_mon_y = c1_nrn_mon_y,
            .syn_mon_x = c1_syn_mon_x, .syn_mon_y = c1_syn_mon_y,
            .syn_mon_AMZI = c1_syn_mon_AMZI, .nrn_mon_AMZI = c1_nrn_mon_AMZI,
            .syn_mon_AMZO = c1_syn_mon_AMZO, .nrn_mon_AMZO = c1_nrn_mon_AMZO,
            .syn_flags_EFO = c1_syn_flags_EFO, .nrn_flags_EFO = c1_nrn_flags_EFO,

            .reset_B = _reset_BX, .reset_reg_B = reset_reg_B, .reset_syn_stge_BI = reset_syn_stge_BI,
            .reset_syn_hs_BO = c1_reset_syn_hs_BO, .reset_syn_stge_BO = c1_reset_syn_stge_BO,
            .reset_nrn_hs_BO = c1_reset_nrn_hs_BO, .reset_nrn_stge_BO = c1_reset_nrn_stge_BO,

            .supply = supply
            );


    texel_core<N_IN-1,N_NRN_X, N_NRN_Y, N_SYN_X, N_SYN_Y,NC_NRN_X, NC_NRN_Y, NC_SYN_X, NC_SYN_Y,N_SYN_DLY_CFG,N_NRN_MON_X, N_NRN_MON_Y, N_SYN_MON_X, N_SYN_MON_Y,N_MON_AMZO_PER_SYN, N_MON_AMZO_PER_NRN,N_FLAGS_PER_SYN, N_FLAGS_PER_NRN,N_BUFFERS,N_LINE_PD_DLY, REG_NCA, REG_NCW, REG_M>
        core2(.in = fifo_dmx2core2.out,

            .reg_data = c2_reg_data,
            // .synapses = c2_synapses,
            // .neurons = c2_neurons,

            .dec_req_x = c2_dec_req_x, .dec_req_y = c2_dec_req_y,
            .dec_ackB = c2_dec_ackB,
            .syn_pu = c2_syn_pu,

            .enc_inx = c2_enc_inx, .enc_iny = c2_enc_iny,
            .nrn_pd_x = c2_nrn_pd_x, .nrn_pd_y = c2_nrn_pd_y,

            .nrn_mon_x = c2_nrn_mon_x, .nrn_mon_y = c2_nrn_mon_y,
            .syn_mon_x = c2_syn_mon_x, .syn_mon_y = c2_syn_mon_y,
            .syn_mon_AMZI = c2_syn_mon_AMZI, .nrn_mon_AMZI = c2_nrn_mon_AMZI,
            .syn_mon_AMZO = c2_syn_mon_AMZO, .nrn_mon_AMZO = c2_nrn_mon_AMZO,
            .syn_flags_EFO = c2_syn_flags_EFO, .nrn_flags_EFO = c2_nrn_flags_EFO,

            .reset_B = _reset_BX, .reset_reg_B = reset_reg_B, .reset_syn_stge_BI = reset_syn_stge_BI,
            .reset_syn_hs_BO = c2_reset_syn_hs_BO, .reset_syn_stge_BO = c2_reset_syn_stge_BO,
            .reset_nrn_hs_BO = c2_reset_nrn_hs_BO, .reset_nrn_stge_BO = c2_reset_nrn_stge_BO,
            
            .supply = supply
            );

    fifo<N_IN-1,N_BUFFERS> fifo_core1out(.in = core1.out, .reset_B = _reset_BX, .supply = supply);
    fifo<N_IN-1,N_BUFFERS> fifo_core2out(.in = core2.out, .reset_B = _reset_BX, .supply = supply);

   
    // Merge cores
    append<N_IN-1, 1, 0> append_core1(.in = fifo_core1out.out, .supply = supply);
    append<N_IN-1, 1, 1> append_core2(.in = fifo_core2out.out, .supply = supply);
    merge<N_IN> merge_core1x2(.in1 = append_core1.out, .in2 = append_core2.out,
        .supply = supply, .reset_B = _reset_BX);

    // Merge cores and loopback
    merge<N_IN> merge_drop8core(.in1 = merge_core1x2.out, .in2 = fifo_drop2mrg.out,
        .reset_B = _reset_BX, .supply = supply);

    // qdi2bd
    fifo<N_IN, N_BUFFERS> fifo_mrg2bd(.in = merge_drop8core.out,
        .reset_B = _reset_BX, .supply = supply);
    qdi2bd<N_IN, N_BD_DLY_CFG> _qdi2bd(.in = fifo_mrg2bd.out, .out = out, .dly_cfg = bd_dly_cfg,
        .reset_B = _reset_BX, .supply = supply);

}






export template<pint N_IN,  // Size of input data from outside world
N_NRN_X, N_NRN_Y, N_SYN_X, N_SYN_Y, // Number of neurons / synapses
NC_NRN_X, NC_NRN_Y, NC_SYN_X, NC_SYN_Y,
N_SYN_DLY_CFG,
N_NRN_MON_X, N_NRN_MON_Y, N_SYN_MON_X, N_SYN_MON_Y,
N_MON_AMZO_PER_SYN, N_MON_AMZO_PER_NRN, // Number of signals that each synapse outputs to be monitored.
N_FLAGS_PER_SYN, N_FLAGS_PER_NRN, // Number of signals that each nrn/syn recieves from the register.
N_BUFFERS,
N_LINE_PD_DLY, // Number of dummy delays to add line pull down
N_BD_DLY_CFG, N_BD_DLY_CFG2,
REG_NCA, REG_NCW, REG_M>
defproc texel_dualcore_mapper (bd<N_IN> in, out;

    Mx1of2<REG_NCW> c1_reg_data[REG_M];
    
    bool! c1_dec_req_x[N_SYN_X], c1_dec_req_y[N_SYN_Y];
    bool? c1_dec_ackB[N_SYN_X];
    a1of1 c1_syn_pu[N_SYN_X];

    a1of1 c1_enc_inx[N_NRN_X], c1_enc_iny[N_NRN_Y];
    a1of1 c1_nrn_pd_x[N_NRN_X], c1_nrn_pd_y[N_NRN_Y];

    bool! c1_nrn_mon_x[N_NRN_MON_X], c1_nrn_mon_y[N_NRN_MON_Y];
    bool! c1_syn_mon_x[N_SYN_MON_X], c1_syn_mon_y[N_SYN_MON_Y];
    bool? c1_syn_mon_AMZI[N_SYN_X * N_MON_AMZO_PER_SYN], c1_nrn_mon_AMZI[N_NRN_X * N_MON_AMZO_PER_NRN];
    bool! c1_syn_mon_AMZO[N_MON_AMZO_PER_SYN], c1_nrn_mon_AMZO[N_MON_AMZO_PER_NRN];
    bool! c1_syn_flags_EFO[N_FLAGS_PER_SYN], c1_nrn_flags_EFO[N_FLAGS_PER_NRN];

    bool! c1_reset_nrn_hs_BO[N_NRN_X], c1_reset_syn_hs_BO[N_SYN_X],
    c1_reset_nrn_stge_BO[N_NRN_X], c1_reset_syn_stge_BO[N_SYN_X];

    Mx1of2<REG_NCW> c2_reg_data[REG_M];

    bool! c2_dec_req_x[N_SYN_X], c2_dec_req_y[N_SYN_Y];
    bool? c2_dec_ackB[N_SYN_X];
    a1of1 c2_syn_pu[N_SYN_X];

    a1of1 c2_enc_inx[N_NRN_X], c2_enc_iny[N_NRN_Y];
    a1of1 c2_nrn_pd_x[N_NRN_X], c2_nrn_pd_y[N_NRN_Y];

    bool! c2_nrn_mon_x[N_NRN_MON_X], c2_nrn_mon_y[N_NRN_MON_Y];
    bool! c2_syn_mon_x[N_SYN_MON_X], c2_syn_mon_y[N_SYN_MON_Y];
    bool? c2_syn_mon_AMZI[N_SYN_X * N_MON_AMZO_PER_SYN], c2_nrn_mon_AMZI[N_NRN_X * N_MON_AMZO_PER_NRN];
    bool! c2_syn_mon_AMZO[N_MON_AMZO_PER_SYN], c2_nrn_mon_AMZO[N_MON_AMZO_PER_NRN];
    bool! c2_syn_flags_EFO[N_FLAGS_PER_SYN], c2_nrn_flags_EFO[N_FLAGS_PER_NRN];

    bool! c2_reset_nrn_hs_BO[N_NRN_X], c2_reset_syn_hs_BO[N_SYN_X],
    c2_reset_nrn_stge_BO[N_NRN_X], c2_reset_syn_stge_BO[N_SYN_X];
    
    bool? bd_dly_cfg[N_BD_DLY_CFG], bd_dly_cfg2[N_BD_DLY_CFG2];
    bool? loopback_en;
    power supply;
    bool? reset_B, reset_reg_B, reset_syn_stge_BI;

    // MAPPER STUFF

    bool? mapper_en;
    avMx1of2<30> out_sram_wr; // Input packets to go to SRAM (rw word addr)
    avMx1of2<8> out_sram_spk; // Spike packets from enc to go to SRAM (core-nrn addr)
    avMx1of2<29> in_sram_r; // Readout packets from SRAM
    avMx1of2<14> in_sram_spk // Spike packets from SRAM (core-syn addr)

    ){

    // Reset buffers
    bool _reset_BX;
    BUF_X12 reset_buf(.a = reset_B, .y = _reset_BX, .vdd = supply.vdd, .vss = supply.vss);

    bd2qdi<N_IN, N_BD_DLY_CFG, N_BD_DLY_CFG2> _bd2qdi(.in = in, .dly_cfg = bd_dly_cfg, .dly_cfg2 = bd_dly_cfg2,
        .reset_B = _reset_BX, .supply = supply);
    fifo<N_IN,N_BUFFERS> fifo_in2fork(.in = _bd2qdi.out, .reset_B = _reset_BX, .supply = supply);

    fork<N_IN> _fork(.in = fifo_in2fork.out, .reset_B = _reset_BX, .supply = supply);

    // Loopback
    fifo<N_IN,N_BUFFERS> fifo_fork2drop(.in = _fork.out1, .reset_B = _reset_BX, .supply = supply);
    dropper_static<N_IN, false> _loopback_dropper(.in = fifo_fork2drop.out, .cond = loopback_en,
        .supply = supply);
    fifo<N_IN,N_BUFFERS> fifo_drop2mrg(.in = _loopback_dropper.out, .reset_B = _reset_BX, .supply = supply);



    // dmx to SRAM
    bool is_to_sram, is_to_cores;
    fifo<32, N_BUFFERS> fifo_fork2sramdmx(.in = _fork.out2, .supply = supply, .reset_B = _reset_BX);
    demux<32> sram_dmx(.in = fifo_fork2sramdmx.out, .supply = supply, .reset_B = _reset_BX);
    sram_dmx.cond.d.d[0].t = is_to_sram;
    sram_dmx.cond.d.d[0].f = is_to_cores;
    AND2_X1 sram_dmx_and(.a = sram_dmx.in.d.d[30].f, .b = sram_dmx.in.d.d[29].t,
        .y = is_to_sram,
        .vdd = supply.vdd, .vss = supply.vss);
    OR3_X1 sram_dmx_or(.a = sram_dmx.in.d.d[30].t, .b = sram_dmx.in.d.d[30].t, .c = sram_dmx.in.d.d[29].f,
        .y = is_to_cores,
        .vdd = supply.vdd, .vss = supply.vss);
    slice_data<32, 0, 30> pre_sram_slice(.supply = supply);
    pre_sram_slice.in.a = sram_dmx.out2.a;
    pre_sram_slice.in.v = sram_dmx.out2.v;
    (i:29:pre_sram_slice.in.d.d[i] = sram_dmx.out2.d.d[i];)
    pre_sram_slice.in.d.d[29] = sram_dmx.out2.d.d[31];
    pre_sram_slice.in.d.d[30] = sram_dmx.out2.d.d[30];
    pre_sram_slice.in.d.d[31] = sram_dmx.out2.d.d[29];
    fifo<30, N_BUFFERS> fifo_out_sram_wr(.in = pre_sram_slice.out, .out = out_sram_wr,
        .reset_B = _reset_BX, .supply = supply);

    // spikes from sram
    // requires weird merging because [core, syny, synx] needs to go to [core, ZEROES, syny, synx]
    fifo<14, N_BUFFERS> fifo_in_sram_spk(.in = in_sram_spk, .reset_B = _reset_BX, .supply = supply);
    append<14,32,0> sram_spk_in_append(.in = fifo_in_sram_spk.out, .supply = supply);
    merge<32> merge_dmx8spk(.in1 = sram_dmx.out1, .reset_B = _reset_BX, .supply = supply);
    merge_dmx8spk.in2.a = sram_spk_in_append.out.a;
    merge_dmx8spk.in2.v = sram_spk_in_append.out.v;
    (i:13: merge_dmx8spk.in2.d.d[i] = sram_spk_in_append.out.d.d[i];)
    merge_dmx8spk.in2.d.d[31] = sram_spk_in_append.out.d.d[13];
    (i:13..30: merge_dmx8spk.in2.d.d[i] = sram_spk_in_append.out.d.d[i+1];)

    // Onwards to core demux
    fifo<N_IN,N_BUFFERS> fifo_fork2dmx(.in = merge_dmx8spk.out, .reset_B = _reset_BX, .supply = supply);
    demux_bit_msb<N_IN-1> core_dmx(.in = fifo_fork2dmx.out, .reset_B = _reset_BX, .supply = supply);
    fifo<N_IN-1,N_BUFFERS> fifo_dmx2core1(.in = core_dmx.out1, .reset_B = _reset_BX, .supply = supply);
    fifo<N_IN-1,N_BUFFERS> fifo_dmx2core2(.in = core_dmx.out2, .reset_B = _reset_BX, .supply = supply);

    // Cores
    texel_core<N_IN-1,N_NRN_X, N_NRN_Y, N_SYN_X, N_SYN_Y,NC_NRN_X, NC_NRN_Y, NC_SYN_X, NC_SYN_Y,N_SYN_DLY_CFG,N_NRN_MON_X, N_NRN_MON_Y, N_SYN_MON_X, N_SYN_MON_Y,N_MON_AMZO_PER_SYN, N_MON_AMZO_PER_NRN,N_FLAGS_PER_SYN, N_FLAGS_PER_NRN,N_BUFFERS,N_LINE_PD_DLY, REG_NCA, REG_NCW, REG_M>
        core1(.in = fifo_dmx2core1.out,

            .reg_data = c1_reg_data,
            // .synapses = c1_synapses,
            // .neurons = c1_neurons,

            .dec_req_x = c1_dec_req_x, .dec_req_y = c1_dec_req_y,
            .dec_ackB = c1_dec_ackB,
            .syn_pu = c1_syn_pu,

            .enc_inx = c1_enc_inx, .enc_iny = c1_enc_iny,
            .nrn_pd_x = c1_nrn_pd_x, .nrn_pd_y = c1_nrn_pd_y,

            .nrn_mon_x = c1_nrn_mon_x, .nrn_mon_y = c1_nrn_mon_y,
            .syn_mon_x = c1_syn_mon_x, .syn_mon_y = c1_syn_mon_y,
            .syn_mon_AMZI = c1_syn_mon_AMZI, .nrn_mon_AMZI = c1_nrn_mon_AMZI,
            .syn_mon_AMZO = c1_syn_mon_AMZO, .nrn_mon_AMZO = c1_nrn_mon_AMZO,
            .syn_flags_EFO = c1_syn_flags_EFO, .nrn_flags_EFO = c1_nrn_flags_EFO,

            .reset_B = _reset_BX, .reset_reg_B = reset_reg_B, .reset_syn_stge_BI = reset_syn_stge_BI,
            .reset_syn_hs_BO = c1_reset_syn_hs_BO, .reset_syn_stge_BO = c1_reset_syn_stge_BO,
            .reset_nrn_hs_BO = c1_reset_nrn_hs_BO, .reset_nrn_stge_BO = c1_reset_nrn_stge_BO,

            .supply = supply
            );


    texel_core<N_IN-1,N_NRN_X, N_NRN_Y, N_SYN_X, N_SYN_Y,NC_NRN_X, NC_NRN_Y, NC_SYN_X, NC_SYN_Y,N_SYN_DLY_CFG,N_NRN_MON_X, N_NRN_MON_Y, N_SYN_MON_X, N_SYN_MON_Y,N_MON_AMZO_PER_SYN, N_MON_AMZO_PER_NRN,N_FLAGS_PER_SYN, N_FLAGS_PER_NRN,N_BUFFERS,N_LINE_PD_DLY, REG_NCA, REG_NCW, REG_M>
        core2(.in = fifo_dmx2core2.out,

            .reg_data = c2_reg_data,
            // .synapses = c2_synapses,
            // .neurons = c2_neurons,

            .dec_req_x = c2_dec_req_x, .dec_req_y = c2_dec_req_y,
            .dec_ackB = c2_dec_ackB,
            .syn_pu = c2_syn_pu,

            .enc_inx = c2_enc_inx, .enc_iny = c2_enc_iny,
            .nrn_pd_x = c2_nrn_pd_x, .nrn_pd_y = c2_nrn_pd_y,

            .nrn_mon_x = c2_nrn_mon_x, .nrn_mon_y = c2_nrn_mon_y,
            .syn_mon_x = c2_syn_mon_x, .syn_mon_y = c2_syn_mon_y,
            .syn_mon_AMZI = c2_syn_mon_AMZI, .nrn_mon_AMZI = c2_nrn_mon_AMZI,
            .syn_mon_AMZO = c2_syn_mon_AMZO, .nrn_mon_AMZO = c2_nrn_mon_AMZO,
            .syn_flags_EFO = c2_syn_flags_EFO, .nrn_flags_EFO = c2_nrn_flags_EFO,

            .reset_B = _reset_BX, .reset_reg_B = reset_reg_B, .reset_syn_stge_BI = reset_syn_stge_BI,
            .reset_syn_hs_BO = c2_reset_syn_hs_BO, .reset_syn_stge_BO = c2_reset_syn_stge_BO,
            .reset_nrn_hs_BO = c2_reset_nrn_hs_BO, .reset_nrn_stge_BO = c2_reset_nrn_stge_BO,
            
            .supply = supply
            );

    fifo<N_IN-1,N_BUFFERS> fifo_core1out(.in = core1.out, .reset_B = _reset_BX, .supply = supply);
    fifo<N_IN-1,N_BUFFERS> fifo_core2out(.in = core2.out, .reset_B = _reset_BX, .supply = supply);

    // Merge cores
    append<N_IN-1, 1, 0> append_core1(.in = fifo_core1out.out, .supply = supply);
    append<N_IN-1, 1, 1> append_core2(.in = fifo_core2out.out, .supply = supply);
    merge<N_IN> merge_core1x2(.in1 = append_core1.out, .in2 = append_core2.out,
        .supply = supply, .reset_B = _reset_BX);


    // fork after core merge then go to mapper if its a spike
    fifo<32, N_BUFFERS> fifo_core2fork(.in = merge_core1x2.out, .reset_B = _reset_BX, .supply = supply);
    fork<32> postcore_fork(.in = fifo_core2fork.out, .reset_B = _reset_BX, .supply = supply);
    dropper_static<32, false> sram_dropper(.in = postcore_fork.out1, .cond = mapper_en, .supply = supply);
    // Need to have it then drop the spike if its from a register.
    demux_td<32, true> drop_if_reg(.in = sram_dropper.out, .reset_B = _reset_BX, .supply = supply); // if cond true, go out on data
    drop_if_reg.cond.d.d[0] = sram_dropper.out.d.d[30];
    drop_if_reg.token.r  = drop_if_reg.token.a;

    slice_data<32,0,8> slice_to_sram(.supply = supply);
    // And move the msb (core bit) to just after the neuron address...
    slice_to_sram.in.a = drop_if_reg.out.a;
    slice_to_sram.in.v = drop_if_reg.out.v;
    (i:7:slice_to_sram.in.d.d[i] = drop_if_reg.out.d.d[i];)
    slice_to_sram.in.d.d[7] = drop_if_reg.out.d.d[31];
    (i:7..30: slice_to_sram.in.d.d[i+1] = drop_if_reg.out.d.d[i];)

    fifo<8,N_BUFFERS> fifo_out_sram_spk(.in = slice_to_sram.out, .out = out_sram_spk,
        .reset_B = _reset_BX, .supply = supply);


    // merge from cores and sram read in
    fifo<29, N_BUFFERS> fifo_in_sram_r(.in = in_sram_r, .reset_B = _reset_BX, .supply = supply);
    fifo<32, N_BUFFERS> fifo_fork2mrg(.in = postcore_fork.out2, .reset_B = _reset_BX, .supply = supply);
    append<29,3,2> sram_read_in_append(.in = fifo_in_sram_r.out, .supply = supply);
    merge<32> merge_sram8core(.in1 = fifo_fork2mrg.out, .in2 = sram_read_in_append.out,
        .reset_B = _reset_BX, .supply = supply);

    // Merge cores and loopback
    fifo<32, N_BUFFERS> fifo_mrg2mrg(.in = merge_sram8core.out, .reset_B = _reset_BX, .supply = supply);
    merge<N_IN> merge_drop8core(.in1 = fifo_mrg2mrg.out, .in2 = fifo_drop2mrg.out,
        .reset_B = _reset_BX, .supply = supply);

    // qdi2bd
    fifo<N_IN, N_BUFFERS> fifo_mrg2bd(.in = merge_drop8core.out,
        .reset_B = _reset_BX, .supply = supply);
    qdi2bd<N_IN, N_BD_DLY_CFG> _qdi2bd(.in = fifo_mrg2bd.out, .out = out, .dly_cfg = bd_dly_cfg,
        .reset_B = _reset_BX, .supply = supply);

}
















}
}