about summary refs log blame commit diff stats
path: root/html/023jump.cc.html
blob: 9e2396851e7975306ff23270525ec7920ed883e1 (plain) (tree)
1
2
3
4
5
6
7
8
9
10
11
12



                                                                                          
                              






                                                                                         

                                                                                                 
                        
                                
                             

                              
                            
                               

                                  












                                                


                                                                     
                                                                                                                

                                                      
                                                            

                                                              


                                                                                      
                                                                                                     
                                                                                         

                                                                                                                                                                                                                        


                                                                                                                                                                                                                                                                                                                                                                                 
                                                                                                                                                                                                                                                           


                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
                                                                                                                                                                                                                                                                                      
                                                                                                                                                                                                                                                                                                                                                                       
                                                                                                                                                                                                                                                                                                                                                                  
                                                                                                                                         

                                

                                                                                
                                                                                                                                



                                                                                  
                                                                                          


                                                                                           


                                                       



                                                                                      
                                                                                                           
                                                                                         

                                                                                                                                                                                                                        


                                                                                                                                                                                                                                                                                                                                                                                     
                                                                                                                                                                                                                                                           


                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
                                                                                                                                                                                                                                                           


                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                                                      
                                                                                                                                                                                                                                                                                                                      
                                                                                                                                                                                                                                                                                                    

                                                                         
                                                                                                                                                                                                                                                                                                                                                                       
                                                                                                                                                                                                                                                                                                                                                                  
                                                                                                                                         



                                                  
                                                                                                                  
                                                                                                                  
 
                                                              
                                                                 
                                                            
                                                                


                                                              
                                                                                                                
                                                                                                                  
 
                                                            
                                                             
                                                                




                                                                                      
                                                                                                                   
                                                                                         

                                                                                                                                                                                                                        


                                                                                                                                                                                                                                                                                                                                                                                         
                                                                                                                                                                                                                                                           


                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
                                                                                                                                                                                                                                                           


                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
                                                                                                                                                                                                                                                                                      
                                                                                                                                                                                                                                                                                                                     
                                                                                                                                                                                                                                                                                                        

                                                                         
                                                                                                                                                                                                                                                                                                                                                                       
                                                                                                                                                                                                                                                                                                                                                                  
                                                                                                                                         



                                                      

                                                                                                                    
 
                                                                
                                                                 
                                                              
                                                                


                                                                  

                                                                                                                      
 
                                                                  
                                                                 
                                                                




                                                                  
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>Mu - 023jump.cc</title>
<meta name="Generator" content="Vim/7.4">
<meta name="plugin-version" content="vim7.4_v1">
<meta name="syntax" content="cpp">
<meta name="settings" content="use_css,pre_wrap,no_foldcolumn,expand_tabs,prevent_copy=">
<meta name="colorscheme" content="minimal">
<style type="text/css">
<!--
pre { white-space: pre-wrap; font-family: monospace; color: #eeeeee; background-color: #080808; }
body { font-family: monospace; color: #eeeeee; background-color: #080808; }
* { font-size: 1.05em; }
.traceAbsent { color: #c00000; }
.cSpecial { color: #008000; }
.Comment { color: #9090ff; }
.Delimiter { color: #a04060; }
.Special { color: #ff6060; }
.Identifier { color: #804000; }
.Constant { color: #00a0a0; }
.traceContains { color: #008000; }
-->
</style>

<script type='text/javascript'>
<!--

-->
</script>
</head>
<body>
<pre id='vimCodeElement'>
<span class="Comment">//: Jump primitives</span>

<span class="Delimiter">:(scenario jump_can_skip_instructions)</span>
recipe main [
  jump <span class="Constant">1</span>:offset
  <span class="Constant">1</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">1</span>
]
<span class="traceContains">+run: jump 1:offset</span>
<span class="traceAbsent">-run: 1:number &lt;- copy 1</span>
<span class="traceAbsent">-mem: storing 1 in location 1</span>

<span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
JUMP<span class="Delimiter">,</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
Recipe_ordinal[<span class="Constant">&quot;jump&quot;</span>] = JUMP<span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
case JUMP: <span class="Delimiter">{</span>
  if <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>ingredients<span class="Delimiter">)</span> != <span class="Constant">1</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
    raise &lt;&lt; current_recipe_name<span class="Delimiter">()</span> &lt;&lt; <span class="Constant">&quot;: 'jump' requires exactly one ingredient, but got &quot;</span> &lt;&lt; current_instruction<span class="Delimiter">().</span>to_string<span class="Delimiter">()</span> &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Identifier">break</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  if <span class="Delimiter">(</span>!scalar<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)))</span> <span class="Delimiter">{</span>
    raise &lt;&lt; current_recipe_name<span class="Delimiter">()</span> &lt;&lt; <span class="Constant">&quot;: first ingredient of 'jump' should be a label or offset, but got &quot;</span> &lt;&lt; current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Identifier">break</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  assert<span class="Delimiter">(</span>current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>initialized<span class="Delimiter">);</span>
  current_step_index<span class="Delimiter">()</span> += ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)</span>+<span class="Constant">1</span><span class="Delimiter">;</span>
  trace<span class="Delimiter">(</span>Primitive_recipe_depth<span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;jumping to instruction &quot;</span> &lt;&lt; current_step_index<span class="Delimiter">()</span> &lt;&lt; end<span class="Delimiter">();</span>
  <span class="Identifier">continue</span><span class="Delimiter">;</span>  <span class="Comment">// skip rest of this instruction</span>
<span class="Delimiter">}</span>

<span class="Comment">//: special type to designate jump targets</span>
<span class="Delimiter">:(before &quot;End Mu Types Initialization&quot;)</span>
Type_ordinal[<span class="Constant">&quot;offset&quot;</span>] = <span class="Constant">0</span><span class="Delimiter">;</span>

<span class="Delimiter">:(scenario jump_backward)</span>
recipe main [
  jump <span class="Constant">1</span>:offset  <span class="Comment"># 0 -+</span>
  jump <span class="Constant">3</span>:offset  <span class="Comment">#    |   +-+ 1</span>
                 <span class="Comment">#   \/  /\ |</span>
  jump -<span class="Constant">2</span>:offset <span class="Comment">#  2 +--&gt;+ |</span>
]                <span class="Comment">#         \/ 3</span>
<span class="traceContains">+run: jump 1:offset</span>
<span class="traceContains">+run: jump -2:offset</span>
<span class="traceContains">+run: jump 3:offset</span>

<span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
JUMP_IF<span class="Delimiter">,</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
Recipe_ordinal[<span class="Constant">&quot;jump-if&quot;</span>] = JUMP_IF<span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
case JUMP_IF: <span class="Delimiter">{</span>
  if <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>ingredients<span class="Delimiter">)</span> != <span class="Constant">2</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
    raise &lt;&lt; current_recipe_name<span class="Delimiter">()</span> &lt;&lt; <span class="Constant">&quot;: 'jump-if' requires exactly two ingredients, but got &quot;</span> &lt;&lt; current_instruction<span class="Delimiter">().</span>to_string<span class="Delimiter">()</span> &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Identifier">break</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  if <span class="Delimiter">(</span>!scalar<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)))</span> <span class="Delimiter">{</span>
    raise &lt;&lt; current_recipe_name<span class="Delimiter">()</span> &lt;&lt; <span class="Constant">&quot;: 'jump-if' requires a boolean for its first ingredient, but got &quot;</span> &lt;&lt; current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Identifier">break</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  if <span class="Delimiter">(</span>!scalar<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">)))</span> <span class="Delimiter">{</span>
    raise &lt;&lt; current_recipe_name<span class="Delimiter">()</span> &lt;&lt; <span class="Constant">&quot;: 'jump-if' requires a label or offset for its second ingredient, but got &quot;</span> &lt;&lt; current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Identifier">break</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  assert<span class="Delimiter">(</span>current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>initialized<span class="Delimiter">);</span>
  if <span class="Delimiter">(</span>!ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">))</span> <span class="Delimiter">{</span>
    trace<span class="Delimiter">(</span>Primitive_recipe_depth<span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;jump-if fell through&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Identifier">break</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  current_step_index<span class="Delimiter">()</span> += ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)</span>+<span class="Constant">1</span><span class="Delimiter">;</span>
  trace<span class="Delimiter">(</span>Primitive_recipe_depth<span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;jumping to instruction &quot;</span> &lt;&lt; current_step_index<span class="Delimiter">()</span> &lt;&lt; end<span class="Delimiter">();</span>
  <span class="Identifier">continue</span><span class="Delimiter">;</span>  <span class="Comment">// skip rest of this instruction</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(scenario jump_if)</span>
recipe main [
  jump-if <span class="Constant">999</span><span class="Delimiter">,</span> <span class="Constant">1</span>:offset
  <span class="Constant">123</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">1</span>
]
<span class="traceContains">+run: jump-if 999, 1:offset</span>
<span class="traceContains">+run: jumping to instruction 2</span>
<span class="traceAbsent">-run: 1:number &lt;- copy 1</span>
<span class="traceAbsent">-mem: storing 1 in location 123</span>

<span class="Delimiter">:(scenario jump_if_fallthrough)</span>
recipe main [
  jump-if <span class="Constant">0</span><span class="Delimiter">,</span> <span class="Constant">1</span>:offset
  <span class="Constant">123</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">1</span>
]
<span class="traceContains">+run: jump-if 0, 1:offset</span>
<span class="traceContains">+run: jump-if fell through</span>
<span class="traceContains">+run: 123:number &lt;- copy 1</span>
<span class="traceContains">+mem: storing 1 in location 123</span>

<span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
JUMP_UNLESS<span class="Delimiter">,</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
Recipe_ordinal[<span class="Constant">&quot;jump-unless&quot;</span>] = JUMP_UNLESS<span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
case JUMP_UNLESS: <span class="Delimiter">{</span>
  if <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>ingredients<span class="Delimiter">)</span> != <span class="Constant">2</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
    raise &lt;&lt; current_recipe_name<span class="Delimiter">()</span> &lt;&lt; <span class="Constant">&quot;: 'jump-unless' requires exactly two ingredients, but got &quot;</span> &lt;&lt; current_instruction<span class="Delimiter">().</span>to_string<span class="Delimiter">()</span> &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Identifier">break</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  if <span class="Delimiter">(</span>!scalar<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)))</span> <span class="Delimiter">{</span>
    raise &lt;&lt; current_recipe_name<span class="Delimiter">()</span> &lt;&lt; <span class="Constant">&quot;: 'jump-unless' requires a boolean for its first ingredient, but got &quot;</span> &lt;&lt; current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Identifier">break</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  if <span class="Delimiter">(</span>!scalar<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">)))</span> <span class="Delimiter">{</span>
    raise &lt;&lt; current_recipe_name<span class="Delimiter">()</span> &lt;&lt; <span class="Constant">&quot;: 'jump-unless' requires a label or offset for its second ingredient, but got &quot;</span> &lt;&lt; current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Identifier">break</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  assert<span class="Delimiter">(</span>current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>initialized<span class="Delimiter">);</span>
  if <span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">))</span> <span class="Delimiter">{</span>
    trace<span class="Delimiter">(</span>Primitive_recipe_depth<span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;jump-unless fell through&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Identifier">break</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  current_step_index<span class="Delimiter">()</span> += ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)</span>+<span class="Constant">1</span><span class="Delimiter">;</span>
  trace<span class="Delimiter">(</span>Primitive_recipe_depth<span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;jumping to instruction &quot;</span> &lt;&lt; current_step_index<span class="Delimiter">()</span> &lt;&lt; end<span class="Delimiter">();</span>
  <span class="Identifier">continue</span><span class="Delimiter">;</span>  <span class="Comment">// skip rest of this instruction</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(scenario jump_unless)</span>
recipe main [
  jump-unless <span class="Constant">0</span><span class="Delimiter">,</span> <span class="Constant">1</span>:offset
  <span class="Constant">123</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">1</span>
]
<span class="traceContains">+run: jump-unless 0, 1:offset</span>
<span class="traceContains">+run: jumping to instruction 2</span>
<span class="traceAbsent">-run: 123:number &lt;- copy 1</span>
<span class="traceAbsent">-mem: storing 1 in location 123</span>

<span class="Delimiter">:(scenario jump_unless_fallthrough)</span>
recipe main [
  jump-unless <span class="Constant">999</span><span class="Delimiter">,</span> <span class="Constant">1</span>:offset
  <span class="Constant">123</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">1</span>
]
<span class="traceContains">+run: jump-unless 999, 1:offset</span>
<span class="traceContains">+run: jump-unless fell through</span>
<span class="traceContains">+run: 123:number &lt;- copy 1</span>
<span class="traceContains">+mem: storing 1 in location 123</span>
</pre>
</body>
</html>
<!-- vim: set foldmethod=manual : -->