File indexing completed on 2024-05-19 04:03:35
0001 <!DOCTYPE html> 0002 <html><head> 0003 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/> 0004 <title>highlight.asm-dsp56k</title> 0005 <meta name="generator" content="KF5::SyntaxHighlighting - Definition (Motorola DSP56k) - Theme (Breeze Dark)"/> 0006 </head><body style="background-color:#232629;color:#cfcfc2"><pre> 0007 <span style="color:#7a7c7d">* initialization</span> 0008 <span style="color:#8e44ad">n</span> <span style="color:#fdbc4b;font-weight:bold">equ</span> <span style="color:#f67400">20</span> 0009 <span style="color:#8e44ad">start</span> <span style="color:#fdbc4b;font-weight:bold">equ</span> <span style="color:#f67400">$40</span> 0010 <span style="color:#8e44ad">wddr</span> <span style="color:#fdbc4b;font-weight:bold">equ</span> <span style="color:#f67400">$0</span> 0011 <span style="color:#8e44ad">cddr</span> <span style="color:#fdbc4b;font-weight:bold">equ</span> <span style="color:#f67400">$0</span> 0012 <span style="color:#8e44ad">input</span> <span style="color:#fdbc4b;font-weight:bold">equ</span> <span style="color:#f67400">$ffe0</span> 0013 <span style="color:#8e44ad">output</span> <span style="color:#fdbc4b;font-weight:bold">equ</span> <span style="color:#f67400">$ffe1</span> 0014 <span style="color:#7a7c7d">;</span> 0015 <span style="color:#fdbc4b;font-weight:bold">org</span> <span style="color:#27ae60;font-weight:bold">p:</span>start 0016 <span style="font-weight:bold">move</span> <span style="color:#27aeae;font-weight:bold">#</span><span style="color:#8e44ad">wddr</span><span style="color:#3f8058">,</span><span style="color:#2980b9">r0</span> <span style="color:#7a7c7d">;r0 ¬ samples</span> 0017 <span style="font-weight:bold">move</span> <span style="color:#27aeae;font-weight:bold">#</span><span style="color:#8e44ad">cddr</span><span style="color:#3f8058">,</span><span style="color:#2980b9">r4</span> <span style="color:#7a7c7d">;r1 ¬ coefficients</span> 0018 <span style="font-weight:bold">move</span> <span style="color:#27aeae;font-weight:bold">#</span><span style="color:#8e44ad">n</span><span style="color:#3f8058">-</span><span style="color:#27aeae;font-weight:bold">1</span><span style="color:#3f8058">,</span><span style="color:#2980b9">m0</span> <span style="color:#7a7c7d">;set modulo arithmetic</span> 0019 <span style="font-weight:bold">move</span> <span style="color:#2980b9">m0</span><span style="color:#3f8058">,</span><span style="color:#2980b9">m4</span> <span style="color:#7a7c7d">;for the 2 circular buffers</span> 0020 <span style="color:#7a7c7d">;</span> 0021 <span style="font-weight:bold">opt</span> cc 0022 <span style="color:#7a7c7d">; filter loop :8+(n-1) cycles</span> 0023 0024 <span style="font-weight:bold">movep</span> <span style="color:#27ae60;font-weight:bold">y:</span>input<span style="color:#3f8058">,</span><span style="color:#27ae60;font-weight:bold">x:</span> <span style="color:#3f8058">(</span><span style="color:#2980b9">r0</span><span style="color:#3f8058">)</span> <span style="color:#7a7c7d">;input sample in memory</span> 0025 <span style="font-weight:bold">clr</span> <span style="color:#2980b9">a</span> <span style="color:#27ae60;font-weight:bold">x:</span><span style="color:#3f8058">(</span><span style="color:#2980b9">r0</span><span style="color:#3f8058">)+</span><span style="color:#3f8058">,</span><span style="color:#2980b9">x0</span> <span style="color:#27ae60;font-weight:bold">y:</span> <span style="color:#3f8058">(</span><span style="color:#2980b9">r4</span><span style="color:#3f8058">)+</span><span style="color:#3f8058">,</span><span style="color:#2980b9">y0</span> 0026 <span style="font-weight:bold">rep</span> <span style="color:#27aeae;font-weight:bold">#</span><span style="color:#8e44ad">n</span><span style="color:#3f8058">-</span><span style="color:#27aeae;font-weight:bold">1</span> 0027 <span style="font-weight:bold">mac</span> <span style="color:#2980b9">x0</span><span style="color:#3f8058">,</span><span style="color:#2980b9">y0</span><span style="color:#3f8058">,</span><span style="color:#2980b9">a</span> <span style="color:#27ae60;font-weight:bold">x:</span><span style="color:#3f8058">(</span><span style="color:#2980b9">r0</span><span style="color:#3f8058">)+</span><span style="color:#3f8058">,</span><span style="color:#2980b9">x0</span> <span style="color:#27ae60;font-weight:bold">y:</span><span style="color:#3f8058">(</span><span style="color:#2980b9">r4</span><span style="color:#3f8058">)+</span><span style="color:#3f8058">,</span><span style="color:#2980b9">y0</span> 0028 <span style="font-weight:bold">macr</span> <span style="color:#2980b9">x0</span><span style="color:#3f8058">,</span><span style="color:#2980b9">x0</span><span style="color:#3f8058">,</span><span style="color:#2980b9">a</span> <span style="color:#3f8058">(</span><span style="color:#2980b9">r0</span><span style="color:#3f8058">)-</span> 0029 0030 <span style="font-weight:bold">movep</span> <span style="color:#2980b9">a</span><span style="color:#3f8058">,</span><span style="color:#27ae60;font-weight:bold">y:</span>output <span style="color:#7a7c7d">;output filtered sample</span> 0031 0032 <span style="color:#8e44ad">fftr2a</span> <span style="color:#fdbc4b;font-weight:bold">macro</span> points<span style="color:#3f8058">,</span>data<span style="color:#3f8058">,</span>coef 0033 <span style="color:#8e44ad">fftr2a</span><span style="color:#3f8058">:</span> <span style="font-weight:bold">ident</span> <span style="color:#f67400">1</span><span style="color:#3f8058">,</span><span style="color:#f67400">1</span> 0034 0035 <span style="font-weight:bold">move</span> <span style="color:#27aeae;font-weight:bold">#</span><span style="color:#8e44ad">points</span><span style="color:#3f8058">/</span><span style="color:#27aeae;font-weight:bold">2</span><span style="color:#3f8058">,</span><span style="color:#2980b9">n0</span> <span style="color:#7a7c7d">;initialize butterflies per group</span> 0036 <span style="font-weight:bold">move</span> <span style="color:#27aeae;font-weight:bold">#1</span><span style="color:#3f8058">,</span><span style="color:#2980b9">n2</span> <span style="color:#7a7c7d">;initialize groups per pass</span> 0037 <span style="font-weight:bold">move</span> <span style="color:#27aeae;font-weight:bold">#</span><span style="color:#8e44ad">points</span><span style="color:#3f8058">/</span><span style="color:#27aeae;font-weight:bold">4</span><span style="color:#3f8058">,</span><span style="color:#2980b9">n6</span> <span style="color:#7a7c7d">;initialize C pointer offset</span> 0038 <span style="font-weight:bold">move</span> <span style="color:#27aeae;font-weight:bold">#</span><span style="color:#3f8058">-</span><span style="color:#27aeae;font-weight:bold">1</span><span style="color:#3f8058">,</span><span style="color:#2980b9">m0</span> <span style="color:#7a7c7d">;initialize A and B address modifiers</span> 0039 <span style="font-weight:bold">move</span> <span style="color:#2980b9">m0</span><span style="color:#3f8058">,</span><span style="color:#2980b9">m1</span> <span style="color:#7a7c7d">;for linear addressing</span> 0040 <span style="font-weight:bold">move</span> <span style="color:#2980b9">m0</span><span style="color:#3f8058">,</span><span style="color:#2980b9">m4</span> 0041 <span style="font-weight:bold">move</span> <span style="color:#2980b9">m0</span><span style="color:#3f8058">,</span><span style="color:#2980b9">m5</span> 0042 <span style="font-weight:bold">move</span> <span style="color:#27aeae;font-weight:bold">#0</span><span style="color:#3f8058">,</span><span style="color:#2980b9">m6</span> <span style="color:#7a7c7d">;initialize C address modifier for</span> 0043 <span style="color:#7a7c7d">;reverse carry (bit-reversed) addressing</span> 0044 0045 <span style="font-weight:bold">do</span> <span style="color:#27aeae;font-weight:bold">#</span><span style="color:#8e44ad;font-weight:bold">@cvi</span> <span style="color:#3f8058">(</span><span style="color:#8e44ad;font-weight:bold">@log</span><span style="color:#3f8058">(</span>points<span style="color:#3f8058">)/</span><span style="color:#8e44ad;font-weight:bold">@log</span><span style="color:#3f8058">(</span><span style="color:#f67400">2</span><span style="color:#3f8058">)+</span><span style="color:#f67400">0.5</span><span style="color:#3f8058">)</span><span style="color:#3f8058">,</span>_end_pass 0046 <span style="font-weight:bold">move</span> <span style="color:#27aeae;font-weight:bold">#</span><span style="color:#8e44ad">data</span><span style="color:#3f8058">,</span><span style="color:#2980b9">r0</span> <span style="color:#7a7c7d">;initialize A input pointer</span> 0047 <span style="font-weight:bold">move</span> <span style="color:#2980b9">r0</span><span style="color:#3f8058">,</span><span style="color:#2980b9">r4</span> <span style="color:#7a7c7d">;initialize A output pointer</span> 0048 0049 <span style="color:#8e44ad">_end_bfy</span> 0050 <span style="font-weight:bold">move</span> <span style="color:#2980b9">a</span><span style="color:#3f8058">,</span><span style="color:#27ae60;font-weight:bold">x:</span><span style="color:#3f8058">(</span><span style="color:#2980b9">r5</span><span style="color:#3f8058">)+</span><span style="color:#2980b9">n5</span> <span style="color:#27ae60;font-weight:bold">y:</span><span style="color:#3f8058">(</span><span style="color:#2980b9">r1</span><span style="color:#3f8058">)+</span><span style="color:#2980b9">n1</span><span style="color:#3f8058">,</span><span style="color:#2980b9">y1</span> 0051 0052 <span style="color:#8e44ad">end_cell</span> 0053 <span style="font-weight:bold">rnd</span> <span style="color:#2980b9">a</span> 0054 <span style="font-weight:bold">movep</span> <span style="color:#27aeae;font-weight:bold">#0</span><span style="color:#3f8058">,</span><span style="color:#27ae60;font-weight:bold">x:</span><span style="color:#f67400">$fffe</span> 0055 <span style="color:#fdbc4b;font-weight:bold">dc</span> <span style="color:#8e44ad;font-weight:bold">@sin</span><span style="color:#3f8058">(</span><span style="color:#8e44ad;font-weight:bold">@cvf</span><span style="color:#3f8058">(</span>count<span style="color:#3f8058">)*</span>freq<span style="color:#3f8058">)</span> 0056 <span style="font-weight:bold">move</span> <span style="color:#27aeae;font-weight:bold">#</span><span style="color:#8e44ad">twiddle</span><span style="color:#3f8058">,</span><span style="color:#2980b9">r2</span> 0057 0058 <span style="font-weight:bold">MOVE</span> <span style="color:#27ae60;font-weight:bold">L:</span><span style="color:#27aeae;font-weight:bold"><$1</span><span style="color:#3f8058">,</span><span style="color:#2980b9">A</span> 0059 <span style="font-weight:bold">SUB</span> <span style="color:#2980b9">X</span><span style="color:#3f8058">,</span><span style="color:#2980b9">A</span> <span style="color:#27ae60;font-weight:bold">L:</span><span style="color:#27aeae;font-weight:bold"><$3</span><span style="color:#3f8058">,</span><span style="color:#2980b9">B</span> 0060 0061 <span style="font-weight:bold">bad_label</span> 0062 <span style="color:#8e44ad">good_label</span><span style="color:#3f8058">:</span> 0063 </pre></body></html>