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templeos-info/public/Wb/Demo/Asm/AsmAndC1.HC.HTML

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<a name="l1"></a><span class=cF2>/*Asm labels can only be defined once</span><span class=cF0>
<a name="l2"></a></span><span class=cF2>in a task. &lt;F5&gt; will spawn a new task</span><span class=cF0>
<a name="l3"></a></span><span class=cF2>each time, so you don't get redefine</span><span class=cF0>
<a name="l4"></a></span><span class=cF2>error, like when repeatedly #including</span><span class=cF0>
<a name="l5"></a></span><span class=cF2>it from the cmd line.</span><span class=cF0>
<a name="l6"></a></span><span class=cF2>*/</span><span class=cF0>
<a name="l7"></a>
<a name="l8"></a></span><span class=cF1>asm</span><span class=cF0> {
<a name="l9"></a></span><span class=cF2>//Opcodes are slightly different to make writing my x86_64 assembler easier.</span><span class=cF0>
<a name="l10"></a></span><span class=cF2>//See </span><a href="/Wb/Compiler/OpCodes.DD.HTML#l1"><span class=cF4>::/Compiler/OpCodes.DD</span></a><span class=cF2>.</span><span class=cF0>
<a name="l11"></a>
<a name="l12"></a> </span><span class=cF1>IMPORT</span><span class=cF0> </span><span class=cF5>Beep</span><span class=cF0>;
<a name="l13"></a>
<a name="l14"></a>_BEEPS::
<a name="l15"></a></span><span class=cF2>//You can always clobber RAX,RBX,RCX,RDX,R8,R9. The compiler expects that.</span><span class=cF0>
<a name="l16"></a></span><span class=cF2>//See </span><a href="/Wb/Kernel/KernelA.HH.HTML#l1801"><span class=cF4>REGG_CLOBBERED</span></a><span class=cF2> and </span><a href="/Wb/Kernel/KernelA.HH.HTML#l1803"><span class=cF4>REGG_STK_TMP</span></a><span class=cF2>.</span><span class=cF0>
<a name="l17"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>RBP</span><span class=cF0>
<a name="l18"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RBP</span><span class=cF0>,</span><span class=cFC>RSP</span><span class=cF0>
<a name="l19"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RCX</span><span class=cF0>,</span><span class=cF9>U64</span><span class=cF0> </span><span class=cF3>SF_ARG1</span><span class=cF0>[</span><span class=cFC>RBP</span><span class=cF0>] </span><span class=cF2>//</span><a href="/Wb/Kernel/KernelA.HH.HTML#l579"><span class=cF4>SF_ARG1</span></a><span class=cF0>
<a name="l20"></a>
<a name="l21"></a>@@05: </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>RCX</span><span class=cF0>
<a name="l22"></a></span><span class=cF2>//U0 </span><a href="/Wb/Kernel/KMisc.HC.HTML#l237"><span class=cF4>Beep</span></a><span class=cF2>(I8 ona=62,Bool busy=FALSE)</span><span class=cF0>
<a name="l23"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cF3>FALSE</span><span class=cF0> </span><span class=cF2>//Do not busy (spin) wait</span><span class=cF0>
<a name="l24"></a> </span><span class=cF1>PUSH</span><span class=cF0> 62 </span><span class=cF2>//500 Hz</span><span class=cF0>
<a name="l25"></a> </span><span class=cF1>CALL</span><span class=cF0> </span><span class=cF5>Beep</span><span class=cF0>
<a name="l26"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>RCX</span><span class=cF0>
<a name="l27"></a> </span><span class=cF1>LOOP</span><span class=cF0> @@05
<a name="l28"></a>
<a name="l29"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>RBP</span><span class=cF0>
<a name="l30"></a> </span><span class=cF1>RET1</span><span class=cF0> 8 </span><span class=cF2>//Use special return. Pop one arg off of stack.</span><span class=cF0>
<a name="l31"></a>
<a name="l32"></a></span><span class=cF2>//HolyC return vals are in RAX. This function has no return value.</span><span class=cF0>
<a name="l33"></a>}
<a name="l34"></a>
<a name="l35"></a></span><span class=cF2>//_extern binds a asm sym to a function.</span><span class=cF0>
<a name="l36"></a></span><span class=cF2>//My convention is to put an underscore</span><span class=cF0>
<a name="l37"></a></span><span class=cF2>//on C callable asm routines.</span><span class=cF0>
<a name="l38"></a></span><span class=cF1>_extern</span><span class=cF0> _BEEPS </span><span class=cF1>U0</span><span class=cF0> Beeps(</span><span class=cF9>I64</span><span class=cF0> cnt);
<a name="l39"></a>
<a name="l40"></a></span><span class=cF9>I64</span><span class=cF0> AsmAndC1()
<a name="l41"></a>{
<a name="l42"></a> </span><span class=cF9>I64</span><span class=cF0> </span><span class=cF1>noreg</span><span class=cF0> i; </span><span class=cF2>//Normally this would be stored in a reg</span><span class=cF0>
<a name="l43"></a></span><span class=cF2>//Check by unassembling with </span><a href="/Wb/Adam/ADbg.HC.HTML#l254"><span class=cF4>Uf</span></a><span class=cF2>(&quot;AsmAndC1&quot;).</span><span class=cF0>
<a name="l44"></a>
<a name="l45"></a> i=</span><span class=cF5>GetI64</span><span class=cF0>(</span><span class=cF6>&quot;Num of beeps 1-5 (%d):&quot;</span><span class=cF0>,3,1,5);
<a name="l46"></a> Beeps(i);
<a name="l47"></a>
<a name="l48"></a> </span><span class=cF1>asm</span><span class=cF0> </span><span class=cF7>{</span><span class=cF0>
<a name="l49"></a></span><span class=cF2>//You can clobber RAX,RBX,RCX,RDX. The compiler expects that.</span><span class=cF0>
<a name="l50"></a>
<a name="l51"></a> </span><span class=cF1>IMPORT</span><span class=cF0> </span><span class=cF5>Snd</span><span class=cF0>; </span><span class=cF2>//Import an not use &amp; or don't import and use &amp;Snd.</span><span class=cF0>
<a name="l52"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RCX</span><span class=cF0>,&amp;i[</span><span class=cFC>RBP</span><span class=cF0>] </span><span class=cF2>//You can clobber RAX,RBX,RCX,RDX.</span><span class=cF0>
<a name="l53"></a> </span><span class=cF2>//You better preserve the rest.</span><span class=cF0>
<a name="l54"></a>@@05: </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>RCX</span><span class=cF0>
<a name="l55"></a>
<a name="l56"></a> </span><span class=cF2>//U0 </span><a href="/Wb/Kernel/KMisc.HC.HTML#l179"><span class=cF4>Snd</span></a><span class=cF2>(I8 ona);</span><span class=cF0>
<a name="l57"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RAX</span><span class=cF0>,</span><span class=cFC>RCX</span><span class=cF0> </span><span class=cF2>//ona=loop*10+50</span><span class=cF0>
<a name="l58"></a> </span><span class=cF1>IMUL2</span><span class=cF0> </span><span class=cFC>RAX</span><span class=cF0>,10 </span><span class=cF2>//TempleOS uses nonstandard opcodes</span><span class=cF0>
<a name="l59"></a> </span><span class=cF2>//to avoid multiple form of the same one.</span><span class=cF0>
<a name="l60"></a> </span><span class=cF2>//See </span><a href="/Wb/Compiler/OpCodes.DD.HTML#l1"><span class=cF4>::/Compiler/OpCodes.DD</span></a><span class=cF2>.</span><span class=cF0>
<a name="l61"></a> </span><span class=cF1>ADD</span><span class=cF0> </span><span class=cFC>RAX</span><span class=cF0>,40
<a name="l62"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>RAX</span><span class=cF0>
<a name="l63"></a> </span><span class=cF1>CALL</span><span class=cF0> </span><span class=cF5>Snd</span><span class=cF0>
<a name="l64"></a>
<a name="l65"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RCX</span><span class=cF0>,</span><span class=cFB>cnts</span><span class=cF0>.time_stamp_freq&gt;&gt;3 </span><span class=cF2>//JIT Const. Simple delay loop</span><span class=cF0>
<a name="l66"></a>@@10: </span><span class=cF1>LOOP</span><span class=cF0> @@10
<a name="l67"></a>
<a name="l68"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>RCX</span><span class=cF0>
<a name="l69"></a> </span><span class=cF1>LOOP</span><span class=cF0> @@05
<a name="l70"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l71"></a> </span><span class=cF5>Snd</span><span class=cF0>;
<a name="l72"></a> </span><span class=cF1>return</span><span class=cF0> i;
<a name="l73"></a>}
<a name="l74"></a>
<a name="l75"></a></span><span class=cF6>&quot;Beeps:%d\n&quot;</span><span class=cF0>,AsmAndC1;
</span></pre></body>
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