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<span id="L1" class="LineNr"> 1 </span><span class="Statement">module</span> <span class="Constant">IIR</span><span class="Special">(</span>clk<span class="Special">,</span>rst_n<span class="Special">,</span>din<span class="Special">,</span>dout<span class="Special">);</span>
<span id="L2" class="LineNr"> 2 </span>
<span id="L3" class="LineNr"> 3 </span> <span class="Statement">input</span> clk<span class="Special">,</span>rst_n <span class="Special">;</span>
<span id="L4" class="LineNr"> 4 </span> <span class="Statement">input</span> <span class="Special">[</span><span class="Constant">12</span><span class="Special">:</span><span class="Constant">0</span> <span class="Special">]</span> din <span class="Special">;</span>
<span id="L5" class="LineNr"> 5 </span>
<span id="L6" class="LineNr"> 6 </span> <span class="Statement">output</span> <span class="Special">[</span><span class="Constant">12</span><span class="Special">:</span><span class="Constant">0</span> <span class="Special">]</span> dout <span class="Special">;</span>
<span id="L7" class="LineNr"> 7 </span>
<span id="L8" class="LineNr"> 8 </span> <span class="Statement">reg</span> <span class="Special">[</span><span class="Constant">12</span><span class="Special">:</span><span class="Constant">0</span> <span class="Special">]</span> x1<span class="Special">,</span>x2<span class="Special">,</span>x3 <span class="Special">;</span>
<span id="L9" class="LineNr"> 9 </span> <span class="Statement">reg</span> <span class="Special">[</span><span class="Constant">12</span><span class="Special">:</span><span class="Constant">0</span> <span class="Special">]</span> y1<span class="Special">,</span>y2<span class="Special">,</span>y3 <span class="Special">;</span>
<span id="L10" class="LineNr">10 </span> <span class="Statement">reg</span> <span class="Special">[</span><span class="Constant">12</span><span class="Special">:</span><span class="Constant">0</span> <span class="Special">]</span> q1<span class="Special">,</span>q2<span class="Special">,</span>q3 <span class="Special">;</span>
<span id="L11" class="LineNr">11 </span> <span class="Statement">reg</span> <span class="Special">[</span><span class="Constant">12</span><span class="Special">:</span><span class="Constant">0</span> <span class="Special">]</span> dout <span class="Special">;</span>
<span id="L12" class="LineNr">12 </span>
<span id="L13" class="LineNr">13 </span> <span class="Statement">wire</span> <span class="Special">[</span><span class="Constant">25</span><span class="Special">:</span><span class="Constant">0</span> <span class="Special">]</span> sum1_abuf<span class="Special">,</span>sum2_abuf <span class="Special">;</span>
<span id="L14" class="LineNr">14 </span> <span class="Statement">wire</span> <span class="Special">[</span><span class="Constant">12</span><span class="Special">:</span><span class="Constant">0</span> <span class="Special">]</span> sum1_buf<span class="Special">,</span>sum2_buf <span class="Special">;</span>
<span id="L15" class="LineNr">15 </span> <span class="Statement">wire</span> <span class="Special">[</span><span class="Constant">25</span><span class="Special">:</span><span class="Constant">0</span> <span class="Special">]</span> mul <span class="Special">[</span><span class="Constant">10</span><span class="Special">:</span><span class="Constant">1</span> <span class="Special">]</span> <span class="Special">;</span>
<span id="L16" class="LineNr">16 </span>
<span id="L17" class="LineNr">17 </span><span class="Statement">always</span> <span class="Special">@</span> <span class="Special">(</span> <span class="Statement">posedge</span> clk <span class="Statement">or</span> <span class="Statement">negedge</span> rst_n <span class="Special">)</span>
<span id="L18" class="LineNr">18 </span> <span class="Statement">if</span><span class="Special">(</span> <span class="Special">!</span>rst_n <span class="Special">)</span>
<span id="L19" class="LineNr">19 </span> <span class="Statement">begin</span>
<span id="L20" class="LineNr">20 </span> x1 <span class="Special"><=</span> <span class="Constant">13'b0</span> <span class="Special">;</span> y1 <span class="Special"><=</span> <span class="Constant">13'b0</span> <span class="Special">;</span> q1 <span class="Special"><=</span> <span class="Constant">13'b0</span> <span class="Special">;</span>
<span id="L21" class="LineNr">21 </span> x2 <span class="Special"><=</span> <span class="Constant">13'b0</span> <span class="Special">;</span> y2 <span class="Special"><=</span> <span class="Constant">13'b0</span> <span class="Special">;</span> q2 <span class="Special"><=</span> <span class="Constant">13'b0</span> <span class="Special">;</span>
<span id="L22" class="LineNr">22 </span> x3 <span class="Special"><=</span> <span class="Constant">13'b0</span> <span class="Special">;</span> y3 <span class="Special"><=</span> <span class="Constant">13'b0</span> <span class="Special">;</span> q3 <span class="Special"><=</span> <span class="Constant">13'b0</span> <span class="Special">;</span>
<span id="L23" class="LineNr">23 </span> <span class="Statement">end</span>
<span id="L24" class="LineNr">24 </span> <span class="Statement">else</span>
<span id="L25" class="LineNr">25 </span> <span class="Statement">begin</span>
<span id="L26" class="LineNr">26 </span> x3 <span class="Special"><=</span> x2 <span class="Special">;</span> x2 <span class="Special"><=</span> x1 <span class="Special">;</span> x1 <span class="Special"><=</span> din <span class="Special">;</span>
<span id="L27" class="LineNr">27 </span> y3 <span class="Special"><=</span> y2 <span class="Special">;</span> y2 <span class="Special"><=</span> y1 <span class="Special">;</span> y1 <span class="Special"><=</span> sum1_buf <span class="Special">;</span>
<span id="L28" class="LineNr">28 </span> q3 <span class="Special"><=</span> q2 <span class="Special">;</span> q2 <span class="Special"><=</span> q1 <span class="Special">;</span> q1 <span class="Special"><=</span> sum2_buf <span class="Special">;</span>
<span id="L29" class="LineNr">29 </span> <span class="Statement">end</span>
<span id="L30" class="LineNr">30 </span>
<span id="L31" class="LineNr">31 </span><span class="Statement">always</span> <span class="Special">@</span> <span class="Special">(</span> <span class="Statement">posedge</span> clk <span class="Statement">or</span> <span class="Statement">negedge</span> rst_n <span class="Special">)</span>
<span id="L32" class="LineNr">32 </span> <span class="Statement">if</span><span class="Special">(</span> <span class="Special">!</span>rst_n <span class="Special">)</span>
<span id="L33" class="LineNr">33 </span> dout <span class="Special"><=</span> <span class="Constant">13'b0</span> <span class="Special">;</span>
<span id="L34" class="LineNr">34 </span> <span class="Statement">else</span>
<span id="L35" class="LineNr">35 </span> dout <span class="Special"><=</span> q1 <span class="Special">;</span>
<span id="L36" class="LineNr">36 </span>
<span id="L37" class="LineNr">37 </span><span class="Comment">//assign sum1_abuf = mul[1] + mul[2] + mul[3] + mul[4] + mul[5] ;</span>
<span id="L38" class="LineNr">38 </span><span class="Comment">//assign sum2_abuf = mul[6] + mul[7] + mul[8] + mul[9] + mul[10] ;</span>
<span id="L39" class="LineNr">39 </span>
<span id="L40" class="LineNr">40 </span><span class="Statement">assign</span> sum1_abuf <span class="Special">=</span> mul<span class="Special">[</span><span class="Constant">1</span><span class="Special">]</span> <span class="Special">+</span> mul<span class="Special">[</span><span class="Constant">5</span><span class="Special">]</span> <span class="Special">;</span>
<span id="L41" class="LineNr">41 </span><span class="Statement">assign</span> sum2_abuf <span class="Special">=</span> mul<span class="Special">[</span><span class="Constant">6</span><span class="Special">]</span> <span class="Special">+</span> mul<span class="Special">[</span><span class="Constant">10</span><span class="Special">]</span> <span class="Special">;</span>
<span id="L42" class="LineNr">42 </span>
<span id="L43" class="LineNr">43 </span>
<span id="L44" class="LineNr">44 </span><span class="Statement">assign</span> sum1_buf <span class="Special">=</span> sum1_abuf<span class="Special">[</span><span class="Constant">25</span><span class="Special">:</span><span class="Constant">13</span><span class="Special">]</span> <span class="Special">;</span>
<span id="L45" class="LineNr">45 </span><span class="Statement">assign</span> sum2_buf <span class="Special">=</span> sum2_abuf<span class="Special">[</span><span class="Constant">25</span><span class="Special">:</span><span class="Constant">13</span><span class="Special">]</span> <span class="Special">;</span>
<span id="L46" class="LineNr">46 </span>
<span id="L47" class="LineNr">47 </span>multiply m0 <span class="Special">(</span> <span class="Special">.</span>clk<span class="Special">(</span>clk<span class="Special">),.</span>a<span class="Special">(</span>x1<span class="Special">),.</span>o<span class="Special">(</span>mul<span class="Special">[</span><span class="Constant">1</span><span class="Special">]</span> <span class="Special">)</span> <span class="Special">);</span>
<span id="L48" class="LineNr">48 </span>multiply m1 <span class="Special">(</span> <span class="Special">.</span>clk<span class="Special">(</span>clk<span class="Special">),.</span>a<span class="Special">(</span>x2<span class="Special">),.</span>o<span class="Special">(</span>mul<span class="Special">[</span><span class="Constant">2</span><span class="Special">]</span> <span class="Special">)</span> <span class="Special">);</span>
<span id="L49" class="LineNr">49 </span>multiply m2 <span class="Special">(</span> <span class="Special">.</span>clk<span class="Special">(</span>clk<span class="Special">),.</span>a<span class="Special">(</span>x3<span class="Special">),.</span>o<span class="Special">(</span>mul<span class="Special">[</span><span class="Constant">3</span><span class="Special">]</span> <span class="Special">)</span> <span class="Special">);</span>
<span id="L50" class="LineNr">50 </span>multiply m3 <span class="Special">(</span> <span class="Special">.</span>clk<span class="Special">(</span>clk<span class="Special">),.</span>a<span class="Special">(</span>y1<span class="Special">),.</span>o<span class="Special">(</span>mul<span class="Special">[</span><span class="Constant">4</span><span class="Special">]</span> <span class="Special">)</span> <span class="Special">);</span>
<span id="L51" class="LineNr">51 </span>multiply m4 <span class="Special">(</span> <span class="Special">.</span>clk<span class="Special">(</span>clk<span class="Special">),.</span>a<span class="Special">(</span>y2<span class="Special">),.</span>o<span class="Special">(</span>mul<span class="Special">[</span><span class="Constant">5</span><span class="Special">]</span> <span class="Special">)</span> <span class="Special">);</span>
<span id="L52" class="LineNr">52 </span>multiply m5 <span class="Special">(</span> <span class="Special">.</span>clk<span class="Special">(</span>clk<span class="Special">),.</span>a<span class="Special">(</span>y1<span class="Special">),.</span>o<span class="Special">(</span>mul<span class="Special">[</span><span class="Constant">6</span><span class="Special">]</span> <span class="Special">)</span> <span class="Special">);</span>
<span id="L53" class="LineNr">53 </span>multiply m6 <span class="Special">(</span> <span class="Special">.</span>clk<span class="Special">(</span>clk<span class="Special">),.</span>a<span class="Special">(</span>y2<span class="Special">),.</span>o<span class="Special">(</span>mul<span class="Special">[</span><span class="Constant">7</span><span class="Special">]</span> <span class="Special">)</span> <span class="Special">);</span>
<span id="L54" class="LineNr">54 </span>multiply m7 <span class="Special">(</span> <span class="Special">.</span>clk<span class="Special">(</span>clk<span class="Special">),.</span>a<span class="Special">(</span>y3<span class="Special">),.</span>o<span class="Special">(</span>mul<span class="Special">[</span><span class="Constant">8</span><span class="Special">]</span> <span class="Special">)</span> <span class="Special">);</span>
<span id="L55" class="LineNr">55 </span>multiply m8 <span class="Special">(</span> <span class="Special">.</span>clk<span class="Special">(</span>clk<span class="Special">),.</span>a<span class="Special">(</span>q1<span class="Special">),.</span>o<span class="Special">(</span>mul<span class="Special">[</span><span class="Constant">9</span><span class="Special">]</span> <span class="Special">)</span> <span class="Special">);</span>
<span id="L56" class="LineNr">56 </span>multiply m9 <span class="Special">(</span> <span class="Special">.</span>clk<span class="Special">(</span>clk<span class="Special">),.</span>a<span class="Special">(</span>q2<span class="Special">),.</span>o<span class="Special">(</span>mul<span class="Special">[</span><span class="Constant">10</span><span class="Special">])</span> <span class="Special">);</span>
<span id="L57" class="LineNr">57 </span>
<span id="L58" class="LineNr">58 </span><span class="Statement">endmodule</span>
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