File indexing completed on 2024-05-19 15:23:13
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 Light)"/> 0006 </head><body style="background-color:#ffffff;color:#1f1c1b"><pre> 0007 <span style="color:#898887;">* initialization</span> 0008 <span style="color:#644a9b;">n</span> <span style="font-weight:bold;">equ</span> <span style="color:#b08000;">20</span> 0009 <span style="color:#644a9b;">start</span> <span style="font-weight:bold;">equ</span> <span style="color:#b08000;">$40</span> 0010 <span style="color:#644a9b;">wddr</span> <span style="font-weight:bold;">equ</span> <span style="color:#b08000;">$0</span> 0011 <span style="color:#644a9b;">cddr</span> <span style="font-weight:bold;">equ</span> <span style="color:#b08000;">$0</span> 0012 <span style="color:#644a9b;">input</span> <span style="font-weight:bold;">equ</span> <span style="color:#b08000;">$ffe0</span> 0013 <span style="color:#644a9b;">output</span> <span style="font-weight:bold;">equ</span> <span style="color:#b08000;">$ffe1</span> 0014 <span style="color:#898887;">;</span> 0015 <span style="font-weight:bold;">org</span> <span style="color:#006e28;font-weight:bold;">p:</span>start 0016 <span style="font-weight:bold;">move</span> <span style="color:#aa5500;">#</span><span style="color:#644a9b;">wddr</span><span style="color:#ca60ca;">,</span><span style="color:#0057ae;">r0</span> <span style="color:#898887;">;r0 ¬ samples</span> 0017 <span style="font-weight:bold;">move</span> <span style="color:#aa5500;">#</span><span style="color:#644a9b;">cddr</span><span style="color:#ca60ca;">,</span><span style="color:#0057ae;">r4</span> <span style="color:#898887;">;r1 ¬ coefficients</span> 0018 <span style="font-weight:bold;">move</span> <span style="color:#aa5500;">#</span><span style="color:#644a9b;">n</span><span style="color:#ca60ca;">-</span><span style="color:#aa5500;">1</span><span style="color:#ca60ca;">,</span><span style="color:#0057ae;">m0</span> <span style="color:#898887;">;set modulo arithmetic</span> 0019 <span style="font-weight:bold;">move</span> <span style="color:#0057ae;">m0</span><span style="color:#ca60ca;">,</span><span style="color:#0057ae;">m4</span> <span style="color:#898887;">;for the 2 circular buffers</span> 0020 <span style="color:#898887;">;</span> 0021 <span style="font-weight:bold;">opt</span> cc 0022 <span style="color:#898887;">; filter loop :8+(n-1) cycles</span> 0023 0024 <span style="font-weight:bold;">movep</span> <span style="color:#006e28;font-weight:bold;">y:</span>input<span style="color:#ca60ca;">,</span><span style="color:#006e28;font-weight:bold;">x:</span> <span style="color:#ca60ca;">(</span><span style="color:#0057ae;">r0</span><span style="color:#ca60ca;">)</span> <span style="color:#898887;">;input sample in memory</span> 0025 <span style="font-weight:bold;">clr</span> <span style="color:#0057ae;">a</span> <span style="color:#006e28;font-weight:bold;">x:</span><span style="color:#ca60ca;">(</span><span style="color:#0057ae;">r0</span><span style="color:#ca60ca;">)+</span><span style="color:#ca60ca;">,</span><span style="color:#0057ae;">x0</span> <span style="color:#006e28;font-weight:bold;">y:</span> <span style="color:#ca60ca;">(</span><span style="color:#0057ae;">r4</span><span style="color:#ca60ca;">)+</span><span style="color:#ca60ca;">,</span><span style="color:#0057ae;">y0</span> 0026 <span style="font-weight:bold;">rep</span> <span style="color:#aa5500;">#</span><span style="color:#644a9b;">n</span><span style="color:#ca60ca;">-</span><span style="color:#aa5500;">1</span> 0027 <span style="font-weight:bold;">mac</span> <span style="color:#0057ae;">x0</span><span style="color:#ca60ca;">,</span><span style="color:#0057ae;">y0</span><span style="color:#ca60ca;">,</span><span style="color:#0057ae;">a</span> <span style="color:#006e28;font-weight:bold;">x:</span><span style="color:#ca60ca;">(</span><span style="color:#0057ae;">r0</span><span style="color:#ca60ca;">)+</span><span style="color:#ca60ca;">,</span><span style="color:#0057ae;">x0</span> <span style="color:#006e28;font-weight:bold;">y:</span><span style="color:#ca60ca;">(</span><span style="color:#0057ae;">r4</span><span style="color:#ca60ca;">)+</span><span style="color:#ca60ca;">,</span><span style="color:#0057ae;">y0</span> 0028 <span style="font-weight:bold;">macr</span> <span style="color:#0057ae;">x0</span><span style="color:#ca60ca;">,</span><span style="color:#0057ae;">x0</span><span style="color:#ca60ca;">,</span><span style="color:#0057ae;">a</span> <span style="color:#ca60ca;">(</span><span style="color:#0057ae;">r0</span><span style="color:#ca60ca;">)-</span> 0029 0030 <span style="font-weight:bold;">movep</span> <span style="color:#0057ae;">a</span><span style="color:#ca60ca;">,</span><span style="color:#006e28;font-weight:bold;">y:</span>output <span style="color:#898887;">;output filtered sample</span> 0031 0032 <span style="color:#644a9b;">fftr2a</span> <span style="font-weight:bold;">macro</span> points<span style="color:#ca60ca;">,</span>data<span style="color:#ca60ca;">,</span>coef 0033 <span style="color:#644a9b;">fftr2a</span><span style="color:#ca60ca;">:</span> <span style="font-weight:bold;">ident</span> <span style="color:#b08000;">1</span><span style="color:#ca60ca;">,</span><span style="color:#b08000;">1</span> 0034 0035 <span style="font-weight:bold;">move</span> <span style="color:#aa5500;">#</span><span style="color:#644a9b;">points</span><span style="color:#ca60ca;">/</span><span style="color:#aa5500;">2</span><span style="color:#ca60ca;">,</span><span style="color:#0057ae;">n0</span> <span style="color:#898887;">;initialize butterflies per group</span> 0036 <span style="font-weight:bold;">move</span> <span style="color:#aa5500;">#1</span><span style="color:#ca60ca;">,</span><span style="color:#0057ae;">n2</span> <span style="color:#898887;">;initialize groups per pass</span> 0037 <span style="font-weight:bold;">move</span> <span style="color:#aa5500;">#</span><span style="color:#644a9b;">points</span><span style="color:#ca60ca;">/</span><span style="color:#aa5500;">4</span><span style="color:#ca60ca;">,</span><span style="color:#0057ae;">n6</span> <span style="color:#898887;">;initialize C pointer offset</span> 0038 <span style="font-weight:bold;">move</span> <span style="color:#aa5500;">#</span><span style="color:#ca60ca;">-</span><span style="color:#aa5500;">1</span><span style="color:#ca60ca;">,</span><span style="color:#0057ae;">m0</span> <span style="color:#898887;">;initialize A and B address modifiers</span> 0039 <span style="font-weight:bold;">move</span> <span style="color:#0057ae;">m0</span><span style="color:#ca60ca;">,</span><span style="color:#0057ae;">m1</span> <span style="color:#898887;">;for linear addressing</span> 0040 <span style="font-weight:bold;">move</span> <span style="color:#0057ae;">m0</span><span style="color:#ca60ca;">,</span><span style="color:#0057ae;">m4</span> 0041 <span style="font-weight:bold;">move</span> <span style="color:#0057ae;">m0</span><span style="color:#ca60ca;">,</span><span style="color:#0057ae;">m5</span> 0042 <span style="font-weight:bold;">move</span> <span style="color:#aa5500;">#0</span><span style="color:#ca60ca;">,</span><span style="color:#0057ae;">m6</span> <span style="color:#898887;">;initialize C address modifier for</span> 0043 <span style="color:#898887;">;reverse carry (bit-reversed) addressing</span> 0044 0045 <span style="font-weight:bold;">do</span> <span style="color:#aa5500;">#</span><span style="color:#644a9b;font-weight:bold;">@cvi</span> <span style="color:#ca60ca;">(</span><span style="color:#644a9b;font-weight:bold;">@log</span><span style="color:#ca60ca;">(</span>points<span style="color:#ca60ca;">)/</span><span style="color:#644a9b;font-weight:bold;">@log</span><span style="color:#ca60ca;">(</span><span style="color:#b08000;">2</span><span style="color:#ca60ca;">)+</span><span style="color:#b08000;">0.5</span><span style="color:#ca60ca;">)</span><span style="color:#ca60ca;">,</span>_end_pass 0046 <span style="font-weight:bold;">move</span> <span style="color:#aa5500;">#</span><span style="color:#644a9b;">data</span><span style="color:#ca60ca;">,</span><span style="color:#0057ae;">r0</span> <span style="color:#898887;">;initialize A input pointer</span> 0047 <span style="font-weight:bold;">move</span> <span style="color:#0057ae;">r0</span><span style="color:#ca60ca;">,</span><span style="color:#0057ae;">r4</span> <span style="color:#898887;">;initialize A output pointer</span> 0048 0049 <span style="color:#644a9b;">_end_bfy</span> 0050 <span style="font-weight:bold;">move</span> <span style="color:#0057ae;">a</span><span style="color:#ca60ca;">,</span><span style="color:#006e28;font-weight:bold;">x:</span><span style="color:#ca60ca;">(</span><span style="color:#0057ae;">r5</span><span style="color:#ca60ca;">)+</span><span style="color:#0057ae;">n5</span> <span style="color:#006e28;font-weight:bold;">y:</span><span style="color:#ca60ca;">(</span><span style="color:#0057ae;">r1</span><span style="color:#ca60ca;">)+</span><span style="color:#0057ae;">n1</span><span style="color:#ca60ca;">,</span><span style="color:#0057ae;">y1</span> 0051 0052 <span style="color:#644a9b;">end_cell</span> 0053 <span style="font-weight:bold;">rnd</span> <span style="color:#0057ae;">a</span> 0054 <span style="font-weight:bold;">movep</span> <span style="color:#aa5500;">#0</span><span style="color:#ca60ca;">,</span><span style="color:#006e28;font-weight:bold;">x:</span><span style="color:#b08000;">$fffe</span> 0055 <span style="font-weight:bold;">dc</span> <span style="color:#644a9b;font-weight:bold;">@sin</span><span style="color:#ca60ca;">(</span><span style="color:#644a9b;font-weight:bold;">@cvf</span><span style="color:#ca60ca;">(</span>count<span style="color:#ca60ca;">)*</span>freq<span style="color:#ca60ca;">)</span> 0056 <span style="font-weight:bold;">move</span> <span style="color:#aa5500;">#</span><span style="color:#644a9b;">twiddle</span><span style="color:#ca60ca;">,</span><span style="color:#0057ae;">r2</span> 0057 0058 <span style="font-weight:bold;">MOVE</span> <span style="color:#006e28;font-weight:bold;">L:</span><span style="color:#aa5500;"><$1</span><span style="color:#ca60ca;">,</span><span style="color:#0057ae;">A</span> 0059 <span style="font-weight:bold;">SUB</span> <span style="color:#0057ae;">X</span><span style="color:#ca60ca;">,</span><span style="color:#0057ae;">A</span> <span style="color:#006e28;font-weight:bold;">L:</span><span style="color:#aa5500;"><$3</span><span style="color:#ca60ca;">,</span><span style="color:#0057ae;">B</span> 0060 0061 <span style="font-weight:bold;">bad_label</span> 0062 <span style="color:#644a9b;">good_label</span><span style="color:#ca60ca;">:</span> 0063 </pre></body></html>