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<title>Mu - linux/braces.subx</title>
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<a href='https://github.com/akkartik/mu/blob/main/linux/braces.subx'>https://github.com/akkartik/mu/blob/main/linux/braces.subx</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="subxComment"># Structured control flow using break/loop rather than jump.</span>
<span id="L2" class="LineNr"> 2 </span><span class="subxComment">#</span>
<span id="L3" class="LineNr"> 3 </span><span class="subxComment"># To run (on Linux):</span>
<span id="L4" class="LineNr"> 4 </span><span class="subxComment"># $ ./translate_subx init.linux [012]*.subx subx-params.subx braces.subx</span>
<span id="L5" class="LineNr"> 5 </span><span class="subxComment"># $ mv a.elf braces</span>
<span id="L6" class="LineNr"> 6 </span><span class="subxComment">#</span>
<span id="L7" class="LineNr"> 7 </span><span class="subxComment"># Example 1:</span>
<span id="L8" class="LineNr"> 8 </span><span class="subxComment"># $ cat x.subx</span>
<span id="L9" class="LineNr"> 9 </span><span class="subxComment"># {</span>
<span id="L10" class="LineNr"> 10 </span><span class="subxComment"># 7c/jump-if-< break/disp8</span>
<span id="L11" class="LineNr"> 11 </span><span class="subxComment"># 74/jump-if-= loop/disp8</span>
<span id="L12" class="LineNr"> 12 </span><span class="subxComment"># }</span>
<span id="L13" class="LineNr"> 13 </span><span class="subxComment"># $ cat x.subx |braces</span>
<span id="L14" class="LineNr"> 14 </span><span class="subxComment"># @loop1:</span>
<span id="L15" class="LineNr"> 15 </span><span class="subxComment"># 7c/jump-if-< @break1/disp8</span>
<span id="L16" class="LineNr"> 16 </span><span class="subxComment"># 74/jump-if-= @loop1/disp8</span>
<span id="L17" class="LineNr"> 17 </span><span class="subxComment"># @break1:</span>
<span id="L18" class="LineNr"> 18 </span><span class="subxComment">#</span>
<span id="L19" class="LineNr"> 19 </span><span class="subxComment"># Example 2:</span>
<span id="L20" class="LineNr"> 20 </span><span class="subxComment"># $ cat x.subx</span>
<span id="L21" class="LineNr"> 21 </span><span class="subxComment"># {</span>
<span id="L22" class="LineNr"> 22 </span><span class="subxComment"># 7c/jump-if-< break/disp8</span>
<span id="L23" class="LineNr"> 23 </span><span class="subxComment"># }</span>
<span id="L24" class="LineNr"> 24 </span><span class="subxComment"># {</span>
<span id="L25" class="LineNr"> 25 </span><span class="subxComment"># 74/jump-if-= loop/disp8</span>
<span id="L26" class="LineNr"> 26 </span><span class="subxComment"># }</span>
<span id="L27" class="LineNr"> 27 </span><span class="subxComment"># $ cat x.subx |braces</span>
<span id="L28" class="LineNr"> 28 </span><span class="subxComment"># @loop1:</span>
<span id="L29" class="LineNr"> 29 </span><span class="subxComment"># 7c/jump-if-< @break1/disp8</span>
<span id="L30" class="LineNr"> 30 </span><span class="subxComment"># @break1:</span>
<span id="L31" class="LineNr"> 31 </span><span class="subxComment"># @loop2:</span>
<span id="L32" class="LineNr"> 32 </span><span class="subxComment"># 74/jump-if-= @loop2/disp8</span>
<span id="L33" class="LineNr"> 33 </span><span class="subxComment"># @break2:</span>
<span id="L34" class="LineNr"> 34 </span><span class="subxComment">#</span>
<span id="L35" class="LineNr"> 35 </span><span class="subxComment"># Example 3:</span>
<span id="L36" class="LineNr"> 36 </span><span class="subxComment"># $ cat x.subx</span>
<span id="L37" class="LineNr"> 37 </span><span class="subxComment"># {</span>
<span id="L38" class="LineNr"> 38 </span><span class="subxComment"># {</span>
<span id="L39" class="LineNr"> 39 </span><span class="subxComment"># 74/jump-if-= loop/disp8</span>
<span id="L40" class="LineNr"> 40 </span><span class="subxComment"># }</span>
<span id="L41" class="LineNr"> 41 </span><span class="subxComment"># 7c/jump-if-< loop/disp8</span>
<span id="L42" class="LineNr"> 42 </span><span class="subxComment"># }</span>
<span id="L43" class="LineNr"> 43 </span><span class="subxComment"># $ cat x.subx |braces</span>
<span id="L44" class="LineNr"> 44 </span><span class="subxComment"># @loop1:</span>
<span id="L45" class="LineNr"> 45 </span><span class="subxComment"># @loop2:</span>
<span id="L46" class="LineNr"> 46 </span><span class="subxComment"># 74/jump-if-= @loop2/disp8</span>
<span id="L47" class="LineNr"> 47 </span><span class="subxComment"># @break2:</span>
<span id="L48" class="LineNr"> 48 </span><span class="subxComment"># 7c/jump-if-< @loop1/disp8</span>
<span id="L49" class="LineNr"> 49 </span><span class="subxComment"># @break1:</span>
<span id="L50" class="LineNr"> 50 </span>
<span id="L51" class="LineNr"> 51 </span>== code
<span id="L52" class="LineNr"> 52 </span>
<span id="L53" class="LineNr"> 53 </span><span class="SpecialChar">Entry</span>: <span class="subxComment"># run tests if necessary, a REPL if not</span>
<span id="L54" class="LineNr"> 54 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L55" class="LineNr"> 55 </span> 89/<- %ebp 4/r32/esp
<span id="L56" class="LineNr"> 56 </span> <span class="subxComment"># initialize heap</span>
<span id="L57" class="LineNr"> 57 </span> (<a href='104new-segment.subx.html#L40'>new-segment</a> *<span class="SpecialChar"><a href='120allocate.subx.html#L34'>Heap-size</a></span> <span class="SpecialChar"><a href='120allocate.subx.html#L27'>Heap</a></span>)
<span id="L58" class="LineNr"> 58 </span> <span class="subxComment"># if (argc <= 1) goto interactive</span>
<span id="L59" class="LineNr"> 59 </span> 81 7/subop/compare *ebp 1/imm32
<span id="L60" class="LineNr"> 60 </span> 7e/jump-if-<= $subx-braces-main:interactive/disp8
<span id="L61" class="LineNr"> 61 </span> <span class="subxComment"># if (argv[1] != "test")) goto interactive</span>
<span id="L62" class="LineNr"> 62 </span> (<a href='103kernel-string-equal.subx.html#L31'>kernel-string-equal?</a> *(ebp+8) <span class="Constant">"test"</span>) <span class="subxComment"># => eax</span>
<span id="L63" class="LineNr"> 63 </span> 3d/compare-eax-and 0/imm32/false
<span id="L64" class="LineNr"> 64 </span> 74/jump-if-= $subx-braces-main:interactive/disp8
<span id="L65" class="LineNr"> 65 </span> <span class="subxComment">#</span>
<span id="L66" class="LineNr"> 66 </span> (run-tests)
<span id="L67" class="LineNr"> 67 </span> <span class="subxComment"># syscall(exit, *Num-test-failures)</span>
<span id="L68" class="LineNr"> 68 </span> 8b/-> *<span class="SpecialChar"><a href='102test.subx.html#L89'>Num-test-failures</a></span> 3/r32/ebx
<span id="L69" class="LineNr"> 69 </span> eb/jump $subx-braces-main:end/disp8
<span id="L70" class="LineNr"> 70 </span><span class="Constant">$subx-braces-main:interactive</span>:
<span id="L71" class="LineNr"> 71 </span> (<a href='braces.subx.html#L77'>subx-braces</a> <span class="SpecialChar"><a href='112read-byte.subx.html#L14'>Stdin</a></span> <span class="SpecialChar"><a href='115write-byte.subx.html#L10'>Stdout</a></span>)
<span id="L72" class="LineNr"> 72 </span> <span class="subxComment"># syscall(exit, 0)</span>
<span id="L73" class="LineNr"> 73 </span> bb/copy-to-ebx 0/imm32
<span id="L74" class="LineNr"> 74 </span><span class="Constant">$subx-braces-main:end</span>:
<span id="L75" class="LineNr"> 75 </span> e8/call <a href='000init.subx.html#L18'>syscall_exit</a>/disp32
<span id="L76" class="LineNr"> 76 </span>
<span id="L77" class="LineNr"> 77 </span><span class="subxFunction">subx-braces</span>: <span class="subxComment"># in: (addr buffered-file), out: (addr buffered-file)</span>
<span id="L78" class="LineNr"> 78 </span> <span class="subxComment"># pseudocode:</span>
<span id="L79" class="LineNr"> 79 </span> <span class="subxComment"># var line: (stream byte 512)</span>
<span id="L80" class="LineNr"> 80 </span> <span class="subxComment"># var label-stack: (stack int 32) # at most 32 levels of nesting</span>
<span id="L81" class="LineNr"> 81 </span> <span class="subxComment"># var next-label-id: int = 1</span>
<span id="L82" class="LineNr"> 82 </span> <span class="subxComment"># while true</span>
<span id="L83" class="LineNr"> 83 </span> <span class="subxComment"># clear-stream(line)</span>
<span id="L84" class="LineNr"> 84 </span> <span class="subxComment"># read-line-buffered(in, line)</span>
<span id="L85" class="LineNr"> 85 </span> <span class="subxComment"># if (line->write == 0) break # end of file</span>
<span id="L86" class="LineNr"> 86 </span> <span class="subxComment"># skip-chars-matching-whitespace(line)</span>
<span id="L87" class="LineNr"> 87 </span> <span class="subxComment"># if line->data[line->read] == '{'</span>
<span id="L88" class="LineNr"> 88 </span> <span class="subxComment"># print(out, "@loop" next-label-id ":\n")</span>
<span id="L89" class="LineNr"> 89 </span> <span class="subxComment"># push(label-stack, next-label-id)</span>
<span id="L90" class="LineNr"> 90 </span> <span class="subxComment"># ++next-label-id</span>
<span id="L91" class="LineNr"> 91 </span> <span class="subxComment"># continue</span>
<span id="L92" class="LineNr"> 92 </span> <span class="subxComment"># if line->data[line->read] == '}'</span>
<span id="L93" class="LineNr"> 93 </span> <span class="subxComment"># var top = pop(label-stack)</span>
<span id="L94" class="LineNr"> 94 </span> <span class="subxComment"># print(out, "@break" top ":\n")</span>
<span id="L95" class="LineNr"> 95 </span> <span class="subxComment"># continue</span>
<span id="L96" class="LineNr"> 96 </span> <span class="subxComment"># while true</span>
<span id="L97" class="LineNr"> 97 </span> <span class="subxComment"># var word-slice: (addr slice) = next-word-or-string(line)</span>
<span id="L98" class="LineNr"> 98 </span> <span class="subxComment"># if slice-empty?(word-slice) # end of line</span>
<span id="L99" class="LineNr"> 99 </span> <span class="subxComment"># break</span>
<span id="L100" class="LineNr">100 </span> <span class="subxComment"># if slice-starts-with?(word-slice, "#") # comment</span>
<span id="L101" class="LineNr">101 </span> <span class="subxComment"># continue</span>
<span id="L102" class="LineNr">102 </span> <span class="subxComment"># if slice-starts-with?(word-slice, "break/")</span>
<span id="L103" class="LineNr">103 </span> <span class="subxComment"># var top = top(label-stack)</span>
<span id="L104" class="LineNr">104 </span> <span class="subxComment"># print(out, "@break" top)</span>
<span id="L105" class="LineNr">105 </span> <span class="subxComment"># word-slice->start += len("break")</span>
<span id="L106" class="LineNr">106 </span> <span class="subxComment"># else if slice-starts-with?(word-slice, "loop/")</span>
<span id="L107" class="LineNr">107 </span> <span class="subxComment"># var top = top(label-stack)</span>
<span id="L108" class="LineNr">108 </span> <span class="subxComment"># print(out, "@loop" top)</span>
<span id="L109" class="LineNr">109 </span> <span class="subxComment"># word-slice->start += len("loop")</span>
<span id="L110" class="LineNr">110 </span> <span class="subxComment"># print(out, word-slice " ")</span>
<span id="L111" class="LineNr">111 </span> <span class="subxComment"># print(out, "\n")</span>
<span id="L112" class="LineNr">112 </span> <span class="subxComment"># flush(out)</span>
<span id="L113" class="LineNr">113 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L114" class="LineNr">114 </span> 55/push-ebp
<span id="L115" class="LineNr">115 </span> 89/<- %ebp 4/r32/esp
<span id="L116" class="LineNr">116 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L117" class="LineNr">117 </span> 50/push-eax
<span id="L118" class="LineNr">118 </span> 51/push-ecx
<span id="L119" class="LineNr">119 </span> 52/push-edx
<span id="L120" class="LineNr">120 </span> 53/push-ebx
<span id="L121" class="LineNr">121 </span> 56/push-esi
<span id="L122" class="LineNr">122 </span> 57/push-edi
<span id="L123" class="LineNr">123 </span> <span class="subxComment"># esi = in</span>
<span id="L124" class="LineNr">124 </span> 8b/-> *(ebp+8) 6/r32/esi
<span id="L125" class="LineNr">125 </span> <span class="subxComment"># var line/ecx: (stream byte 512)</span>
<span id="L126" class="LineNr">126 </span> 81 5/subop/subtract %esp 0x200/imm32
<span id="L127" class="LineNr">127 </span> 68/push 0x200/imm32/length
<span id="L128" class="LineNr">128 </span> 68/push 0/imm32/read
<span id="L129" class="LineNr">129 </span> 68/push 0/imm32/write
<span id="L130" class="LineNr">130 </span> 89/<- %ecx 4/r32/esp
<span id="L131" class="LineNr">131 </span> <span class="subxComment"># var label-stack/edx: (stack int 32)</span>
<span id="L132" class="LineNr">132 </span> 81 5/subop/subtract %esp 0x80/imm32
<span id="L133" class="LineNr">133 </span> 68/push 0x80/imm32/length
<span id="L134" class="LineNr">134 </span> 68/push 0/imm32/top
<span id="L135" class="LineNr">135 </span> 89/<- %edx 4/r32/esp
<span id="L136" class="LineNr">136 </span> <span class="subxComment"># var next-label-id/ebx: int = 1</span>
<span id="L137" class="LineNr">137 </span> c7 0/subop/copy %ebx 1/imm32
<span id="L138" class="LineNr">138 </span> <span class="subxComment"># var word-slice/edi: slice</span>
<span id="L139" class="LineNr">139 </span> 68/push 0/imm32/end
<span id="L140" class="LineNr">140 </span> 68/push 0/imm32/start
<span id="L141" class="LineNr">141 </span> 89/<- %edi 4/r32/esp
<span id="L142" class="LineNr">142 </span><span class="Constant">$subx-braces:line-loop</span>:
<span id="L143" class="LineNr">143 </span> (<a href='106stream.subx.html#L17'>clear-stream</a> %ecx)
<span id="L144" class="LineNr">144 </span> (<a href='122read-line.subx.html#L9'>read-line-buffered</a> %esi %ecx)
<span id="L145" class="LineNr">145 </span><span class="Constant">$subx-braces:check0</span>:
<span id="L146" class="LineNr">146 </span> <span class="subxComment"># if (line->write == 0) break</span>
<span id="L147" class="LineNr">147 </span> 81 7/subop/compare *ecx 0/imm32
<span id="L148" class="LineNr">148 </span> 0f 84/jump-if-= $subx-braces:<span class="Constant">break</span>/disp32
<span id="L149" class="LineNr">149 </span> (<a href='124next-token.subx.html#L464'>skip-chars-matching-whitespace</a> %ecx)
<span id="L150" class="LineNr">150 </span><span class="Constant">$subx-braces:check-for-curly-open</span>:
<span id="L151" class="LineNr">151 </span> <span class="subxComment"># if (line->data[line->read] != '{') goto next check</span>
<span id="L152" class="LineNr">152 </span> <span class="subxS1Comment"># . eax = line->data[line->read]</span>
<span id="L153" class="LineNr">153 </span> 8b/-> *(ecx+4) 0/r32/eax
<span id="L154" class="LineNr">154 </span> 8a/copy-byte *(ecx+eax+0xc) 0/r32/AL
<span id="L155" class="LineNr">155 </span> 25/and-eax-with 0xff/imm32
<span id="L156" class="LineNr">156 </span> <span class="subxS1Comment"># . if (eax != '{') continue</span>
<span id="L157" class="LineNr">157 </span> 3d/compare-eax-and 0x7b/imm32/open-curly
<span id="L158" class="LineNr">158 </span> 0f 85/jump-if-!= $subx-braces:check-for-curly-closed/disp32
<span id="L159" class="LineNr">159 </span><span class="Constant">$subx-braces:emit-curly-open</span>:
<span id="L160" class="LineNr">160 </span> <span class="subxComment"># print(out, "@loop" next-label-id ":")</span>
<span id="L161" class="LineNr">161 </span> (<a href='116write-buffered.subx.html#L8'>write-buffered</a> *(ebp+0xc) <span class="Constant">"@loop"</span>)
<span id="L162" class="LineNr">162 </span> (<a href='117write-int-hex.subx.html#L288'>write-int32-hex-buffered</a> *(ebp+0xc) %ebx)
<span id="L163" class="LineNr">163 </span> (<a href='116write-buffered.subx.html#L8'>write-buffered</a> *(ebp+0xc) <span class="Constant">":"</span>)
<span id="L164" class="LineNr">164 </span> <span class="subxComment"># push(label-stack, next-label-id)</span>
<span id="L165" class="LineNr">165 </span> (<a href='203stack.subx.html#L114'>push</a> %edx %ebx)
<span id="L166" class="LineNr">166 </span> <span class="subxComment"># ++next-label-id</span>
<span id="L167" class="LineNr">167 </span> ff 0/subop/increment %ebx
<span id="L168" class="LineNr">168 </span> <span class="subxComment"># continue</span>
<span id="L169" class="LineNr">169 </span> e9/jump $subx-braces:next-line/disp32
<span id="L170" class="LineNr">170 </span><span class="Constant">$subx-braces:check-for-curly-closed</span>:
<span id="L171" class="LineNr">171 </span> <span class="subxComment"># if (line->data[line->read] != '}') goto next check</span>
<span id="L172" class="LineNr">172 </span> 3d/compare-eax-and 0x7d/imm32/close-curly
<span id="L173" class="LineNr">173 </span> 0f 85/jump-if-= $subx-braces:word-loop/disp32
<span id="L174" class="LineNr">174 </span><span class="Constant">$subx-braces:emit-curly-closed</span>:
<span id="L175" class="LineNr">175 </span> <span class="subxComment"># eax = pop(label-stack)</span>
<span id="L176" class="LineNr">176 </span> (<a href='203stack.subx.html#L234'>pop</a> %edx)
<span id="L177" class="LineNr">177 </span> <span class="subxComment"># print(out, "@break" eax ":")</span>
<span id="L178" class="LineNr">178 </span> (<a href='116write-buffered.subx.html#L8'>write-buffered</a> *(ebp+0xc) <span class="Constant">"@break"</span>)
<span id="L179" class="LineNr">179 </span> (<a href='117write-int-hex.subx.html#L288'>write-int32-hex-buffered</a> *(ebp+0xc) %eax)
<span id="L180" class="LineNr">180 </span> (<a href='116write-buffered.subx.html#L8'>write-buffered</a> *(ebp+0xc) <span class="Constant">":"</span>)
<span id="L181" class="LineNr">181 </span> <span class="subxComment"># continue</span>
<span id="L182" class="LineNr">182 </span> e9/jump $subx-braces:next-line/disp32
<span id="L183" class="LineNr">183 </span><span class="Constant">$subx-braces:word-loop</span>:
<span id="L184" class="LineNr">184 </span> (<a href='135next-word-or-string.subx.html#L8'>next-word-or-string</a> %ecx %edi)
<span id="L185" class="LineNr">185 </span><span class="Constant">$subx-braces:check1</span>:
<span id="L186" class="LineNr">186 </span> <span class="subxComment"># if (slice-empty?(word-slice)) break</span>
<span id="L187" class="LineNr">187 </span> (<a href='123slice.subx.html#L9'>slice-empty?</a> %edi)
<span id="L188" class="LineNr">188 </span> 3d/compare-eax-and 0/imm32/false
<span id="L189" class="LineNr">189 </span> 0f 85/jump-if-!= $subx-braces:next-line/disp32
<span id="L190" class="LineNr">190 </span><span class="Constant">$subx-braces:check-for-comment</span>:
<span id="L191" class="LineNr">191 </span> <span class="subxComment"># if (slice-starts-with?(word-slice, "#")) continue</span>
<span id="L192" class="LineNr">192 </span> <span class="subxS1Comment"># . eax = *word-slice->start</span>
<span id="L193" class="LineNr">193 </span> 8b/-> *edi 0/r32/eax
<span id="L194" class="LineNr">194 </span> 8a/copy-byte *eax 0/r32/AL
<span id="L195" class="LineNr">195 </span> 25/and-eax-with 0xff/imm32
<span id="L196" class="LineNr">196 </span> <span class="subxS1Comment"># . if (eax == '#') continue</span>
<span id="L197" class="LineNr">197 </span> 3d/compare-eax-and 0x23/imm32/hash
<span id="L198" class="LineNr">198 </span> 74/jump-if-= $subx-braces:word-loop/disp8
<span id="L199" class="LineNr">199 </span><span class="Constant">$subx-braces:check-for-break</span>:
<span id="L200" class="LineNr">200 </span> <span class="subxComment"># if (!slice-starts-with?(word-slice, "break/")) goto next check</span>
<span id="L201" class="LineNr">201 </span> <span class="subxS1Comment"># . eax = slice-starts-with?(word-slice, "break/")</span>
<span id="L202" class="LineNr">202 </span> (<a href='123slice.subx.html#L487'>slice-starts-with?</a> %edi <span class="Constant">"break/"</span>)
<span id="L203" class="LineNr">203 </span> <span class="subxS1Comment"># . if (eax == false) goto next check</span>
<span id="L204" class="LineNr">204 </span> 3d/compare-eax-and 0/imm32/false
<span id="L205" class="LineNr">205 </span> 74/jump-if-= $subx-braces:check-for-loop/disp8
<span id="L206" class="LineNr">206 </span><span class="Constant">$subx-braces:emit-break</span>:
<span id="L207" class="LineNr">207 </span> (<a href='203stack.subx.html#L338'>top</a> %edx)
<span id="L208" class="LineNr">208 </span> <span class="subxComment"># print(out, "@break" eax)</span>
<span id="L209" class="LineNr">209 </span> (<a href='116write-buffered.subx.html#L8'>write-buffered</a> *(ebp+0xc) <span class="Constant">"@break"</span>)
<span id="L210" class="LineNr">210 </span> (<a href='117write-int-hex.subx.html#L288'>write-int32-hex-buffered</a> *(ebp+0xc) %eax)
<span id="L211" class="LineNr">211 </span> <span class="subxComment"># word-slice->start += len("break")</span>
<span id="L212" class="LineNr">212 </span> 81 0/subop/add *edi 5/imm32/strlen
<span id="L213" class="LineNr">213 </span> <span class="subxComment"># emit rest of word as usual</span>
<span id="L214" class="LineNr">214 </span> eb/jump $subx-braces:emit-word-slice/disp8
<span id="L215" class="LineNr">215 </span><span class="Constant">$subx-braces:check-for-loop</span>:
<span id="L216" class="LineNr">216 </span> <span class="subxComment"># if (!slice-starts-with?(word-slice, "loop/")) emit word</span>
<span id="L217" class="LineNr">217 </span> <span class="subxS1Comment"># . eax = slice-starts-with?(word-slice, "loop/")</span>
<span id="L218" class="LineNr">218 </span> (<a href='123slice.subx.html#L487'>slice-starts-with?</a> %edi <span class="Constant">"loop/"</span>)
<span id="L219" class="LineNr">219 </span> <span class="subxS1Comment"># . if (eax == false) goto next check</span>
<span id="L220" class="LineNr">220 </span> 3d/compare-eax-and 0/imm32/false
<span id="L221" class="LineNr">221 </span> 74/jump-if-= $subx-braces:emit-word-slice/disp8
<span id="L222" class="LineNr">222 </span><span class="Constant">$subx-braces:emit-loop</span>:
<span id="L223" class="LineNr">223 </span> (<a href='203stack.subx.html#L338'>top</a> %edx)
<span id="L224" class="LineNr">224 </span> <span class="subxComment"># print(out, "@loop" eax)</span>
<span id="L225" class="LineNr">225 </span> (<a href='116write-buffered.subx.html#L8'>write-buffered</a> *(ebp+0xc) <span class="Constant">"@loop"</span>)
<span id="L226" class="LineNr">226 </span> (<a href='117write-int-hex.subx.html#L288'>write-int32-hex-buffered</a> *(ebp+0xc) %eax)
<span id="L227" class="LineNr">227 </span> <span class="subxComment"># word-slice->start += len("loop")</span>
<span id="L228" class="LineNr">228 </span> 81 0/subop/add *edi 4/imm32/strlen
<span id="L229" class="LineNr">229 </span> <span class="subxComment"># fall through</span>
<span id="L230" class="LineNr">230 </span><span class="Constant">$subx-braces:emit-word-slice</span>:
<span id="L231" class="LineNr">231 </span> <span class="subxComment"># print(out, word-slice " ")</span>
<span id="L232" class="LineNr">232 </span> (<a href='123slice.subx.html#L908'>write-slice-buffered</a> *(ebp+0xc) %edi)
<span id="L233" class="LineNr">233 </span> (<a href='116write-buffered.subx.html#L8'>write-buffered</a> *(ebp+0xc) <span class="SpecialChar"><a href='102test.subx.html#L93'>Space</a></span>)
<span id="L234" class="LineNr">234 </span> <span class="subxComment"># loop to next word</span>
<span id="L235" class="LineNr">235 </span> e9/jump $subx-braces:word-loop/disp32
<span id="L236" class="LineNr">236 </span><span class="Constant">$subx-braces:next-line</span>:
<span id="L237" class="LineNr">237 </span> <span class="subxComment"># print(out, "\n")</span>
<span id="L238" class="LineNr">238 </span> (<a href='116write-buffered.subx.html#L8'>write-buffered</a> *(ebp+0xc) <span class="SpecialChar"><a href='102test.subx.html#L82'>Newline</a></span>)
<span id="L239" class="LineNr">239 </span> <span class="subxComment"># loop to next line</span>
<span id="L240" class="LineNr">240 </span> e9/jump $subx-braces:line-loop/disp32
<span id="L241" class="LineNr">241 </span><span class="Constant">$subx-braces:break</span>:
<span id="L242" class="LineNr">242 </span> (<a href='115write-byte.subx.html#L81'>flush</a> *(ebp+0xc))
<span id="L243" class="LineNr">243 </span><span class="Constant">$subx-braces:end</span>:
<span id="L244" class="LineNr">244 </span> <span class="subxS1Comment"># . reclaim locals</span>
<span id="L245" class="LineNr">245 </span> 81 0/subop/add %esp 0x29c/imm32
<span id="L246" class="LineNr">246 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L247" class="LineNr">247 </span> 5f/pop-to-edi
<span id="L248" class="LineNr">248 </span> 5e/pop-to-esi
<span id="L249" class="LineNr">249 </span> 5b/pop-to-ebx
<span id="L250" class="LineNr">250 </span> 5a/pop-to-edx
<span id="L251" class="LineNr">251 </span> 59/pop-to-ecx
<span id="L252" class="LineNr">252 </span> 58/pop-to-eax
<span id="L253" class="LineNr">253 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L254" class="LineNr">254 </span> 89/<- %esp 5/r32/ebp
<span id="L255" class="LineNr">255 </span> 5d/pop-to-ebp
<span id="L256" class="LineNr">256 </span> c3/return
<span id="L257" class="LineNr">257 </span>
<span id="L258" class="LineNr">258 </span><span class="subxTest">test-subx-braces-passes-most-words-through</span>:
<span id="L259" class="LineNr">259 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L260" class="LineNr">260 </span> 55/push-ebp
<span id="L261" class="LineNr">261 </span> 89/<- %ebp 4/r32/esp
<span id="L262" class="LineNr">262 </span> <span class="subxComment"># setup</span>
<span id="L263" class="LineNr">263 </span> (<a href='106stream.subx.html#L17'>clear-stream</a> <a href='112read-byte.subx.html#L331'>_test-input-stream</a>)
<span id="L264" class="LineNr">264 </span> (<a href='106stream.subx.html#L17'>clear-stream</a> <a href='115write-byte.subx.html#L287'>_test-output-stream</a>)
<span id="L265" class="LineNr">265 </span> (<a href='106stream.subx.html#L17'>clear-stream</a> $_test-input-buffered-file->buffer)
<span id="L266" class="LineNr">266 </span> (<a href='106stream.subx.html#L17'>clear-stream</a> $_test-output-buffered-file->buffer)
<span id="L267" class="LineNr">267 </span> <span class="subxComment"># test</span>
<span id="L268" class="LineNr">268 </span> (<a href='108write.subx.html#L24'>write</a> <a href='112read-byte.subx.html#L331'>_test-input-stream</a> <span class="Constant">"== abcd 0x1"</span>)
<span id="L269" class="LineNr">269 </span> (<a href='braces.subx.html#L77'>subx-braces</a> <a href='112read-byte.subx.html#L405'>_test-input-buffered-file</a> <a href='115write-byte.subx.html#L425'>_test-output-buffered-file</a>)
<span id="L270" class="LineNr">270 </span> <span class="subxComment"># check that the line just passed through</span>
<span id="L271" class="LineNr">271 </span> (<a href='115write-byte.subx.html#L81'>flush</a> <a href='115write-byte.subx.html#L425'>_test-output-buffered-file</a>)
<span id="L272" class="Folded">272 </span><span class="Folded">+-- 5 lines: #? # dump _test-output-stream ----------------------------------------------------------------------------------------------------------------------------</span>
<span id="L277" class="LineNr">277 </span> (<a href='109stream-equal.subx.html#L194'>check-stream-equal</a> <a href='115write-byte.subx.html#L287'>_test-output-stream</a> <span class="Constant">"== abcd 0x1 \n"</span> <span class="Constant">"F - test-subx-braces-passes-most-words-through"</span>)
<span id="L278" class="LineNr">278 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L279" class="LineNr">279 </span> 89/<- %esp 5/r32/ebp
<span id="L280" class="LineNr">280 </span> 5d/pop-to-ebp
<span id="L281" class="LineNr">281 </span> c3/return
<span id="L282" class="LineNr">282 </span>
<span id="L283" class="LineNr">283 </span><span class="subxTest">test-subx-braces-1</span>:
<span id="L284" class="LineNr">284 </span> <span class="subxComment"># input:</span>
<span id="L285" class="LineNr">285 </span> <span class="subxComment"># {</span>
<span id="L286" class="LineNr">286 </span> <span class="subxComment"># ab break/imm32</span>
<span id="L287" class="LineNr">287 </span> <span class="subxComment"># cd loop/imm32</span>
<span id="L288" class="LineNr">288 </span> <span class="subxComment"># }</span>
<span id="L289" class="LineNr">289 </span> <span class="subxComment">#</span>
<span id="L290" class="LineNr">290 </span> <span class="subxComment"># output:</span>
<span id="L291" class="LineNr">291 </span> <span class="subxComment"># @loop1:</span>
<span id="L292" class="LineNr">292 </span> <span class="subxComment"># ab @break1/imm32</span>
<span id="L293" class="LineNr">293 </span> <span class="subxComment"># cd @loop1/imm32</span>
<span id="L294" class="LineNr">294 </span> <span class="subxComment"># @break1:</span>
<span id="L295" class="LineNr">295 </span> <span class="subxComment">#</span>
<span id="L296" class="LineNr">296 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L297" class="LineNr">297 </span> 55/push-ebp
<span id="L298" class="LineNr">298 </span> 89/<- %ebp 4/r32/esp
<span id="L299" class="LineNr">299 </span> <span class="subxComment"># setup</span>
<span id="L300" class="LineNr">300 </span> (<a href='106stream.subx.html#L17'>clear-stream</a> <a href='112read-byte.subx.html#L331'>_test-input-stream</a>)
<span id="L301" class="LineNr">301 </span> (<a href='106stream.subx.html#L17'>clear-stream</a> <a href='115write-byte.subx.html#L287'>_test-output-stream</a>)
<span id="L302" class="LineNr">302 </span> (<a href='106stream.subx.html#L17'>clear-stream</a> $_test-input-buffered-file->buffer)
<span id="L303" class="LineNr">303 </span> (<a href='106stream.subx.html#L17'>clear-stream</a> $_test-output-buffered-file->buffer)
<span id="L304" class="LineNr">304 </span> <span class="subxComment"># test</span>
<span id="L305" class="LineNr">305 </span> (<a href='108write.subx.html#L24'>write</a> <a href='112read-byte.subx.html#L331'>_test-input-stream</a> <span class="Constant">"{\nab break/imm32\ncd loop/imm32\n}"</span>)
<span id="L306" class="LineNr">306 </span> (<a href='braces.subx.html#L77'>subx-braces</a> <a href='112read-byte.subx.html#L405'>_test-input-buffered-file</a> <a href='115write-byte.subx.html#L425'>_test-output-buffered-file</a>)
<span id="L307" class="LineNr">307 </span> <span class="subxComment"># check that the line just passed through</span>
<span id="L308" class="LineNr">308 </span> (<a href='115write-byte.subx.html#L81'>flush</a> <a href='115write-byte.subx.html#L425'>_test-output-buffered-file</a>)
<span id="L309" class="Folded">309 </span><span class="Folded">+-- 5 lines: #? # dump _test-output-stream ----------------------------------------------------------------------------------------------------------------------------</span>
<span id="L314" class="LineNr">314 </span> (<a href='109stream-equal.subx.html#L194'>check-stream-equal</a> <a href='115write-byte.subx.html#L287'>_test-output-stream</a> <span class="Constant">"@loop0x00000001:\nab @break0x00000001/imm32 \ncd @loop0x00000001/imm32 \n@break0x00000001:\n"</span> <span class="Constant">"F - test-subx-braces-1"</span>)
<span id="L315" class="LineNr">315 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L316" class="LineNr">316 </span> 89/<- %esp 5/r32/ebp
<span id="L317" class="LineNr">317 </span> 5d/pop-to-ebp
<span id="L318" class="LineNr">318 </span> c3/return
<span id="L319" class="LineNr">319 </span>
<span id="L320" class="LineNr">320 </span><span class="subxTest">test-subx-braces-2</span>:
<span id="L321" class="LineNr">321 </span> <span class="subxComment"># input:</span>
<span id="L322" class="LineNr">322 </span> <span class="subxComment"># {</span>
<span id="L323" class="LineNr">323 </span> <span class="subxComment"># {</span>
<span id="L324" class="LineNr">324 </span> <span class="subxComment"># ab break/imm32</span>
<span id="L325" class="LineNr">325 </span> <span class="subxComment"># }</span>
<span id="L326" class="LineNr">326 </span> <span class="subxComment"># cd loop/imm32</span>
<span id="L327" class="LineNr">327 </span> <span class="subxComment"># }</span>
<span id="L328" class="LineNr">328 </span> <span class="subxComment">#</span>
<span id="L329" class="LineNr">329 </span> <span class="subxComment"># output:</span>
<span id="L330" class="LineNr">330 </span> <span class="subxComment"># @loop1:</span>
<span id="L331" class="LineNr">331 </span> <span class="subxComment"># @loop2:</span>
<span id="L332" class="LineNr">332 </span> <span class="subxComment"># ab @break2/imm32</span>
<span id="L333" class="LineNr">333 </span> <span class="subxComment"># @break2:</span>
<span id="L334" class="LineNr">334 </span> <span class="subxComment"># cd @loop1/imm32</span>
<span id="L335" class="LineNr">335 </span> <span class="subxComment"># @break1:</span>
<span id="L336" class="LineNr">336 </span> <span class="subxComment">#</span>
<span id="L337" class="LineNr">337 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L338" class="LineNr">338 </span> 55/push-ebp
<span id="L339" class="LineNr">339 </span> 89/<- %ebp 4/r32/esp
<span id="L340" class="LineNr">340 </span> <span class="subxComment"># setup</span>
<span id="L341" class="LineNr">341 </span> (<a href='106stream.subx.html#L17'>clear-stream</a> <a href='112read-byte.subx.html#L331'>_test-input-stream</a>)
<span id="L342" class="LineNr">342 </span> (<a href='106stream.subx.html#L17'>clear-stream</a> <a href='115write-byte.subx.html#L287'>_test-output-stream</a>)
<span id="L343" class="LineNr">343 </span> (<a href='106stream.subx.html#L17'>clear-stream</a> $_test-input-buffered-file->buffer)
<span id="L344" class="LineNr">344 </span> (<a href='106stream.subx.html#L17'>clear-stream</a> $_test-output-buffered-file->buffer)
<span id="L345" class="LineNr">345 </span> <span class="subxComment"># test</span>
<span id="L346" class="LineNr">346 </span> (<a href='108write.subx.html#L24'>write</a> <a href='112read-byte.subx.html#L331'>_test-input-stream</a> <span class="Constant">"{\n{\nab break/imm32\n}\ncd loop/imm32\n}"</span>)
<span id="L347" class="LineNr">347 </span> (<a href='braces.subx.html#L77'>subx-braces</a> <a href='112read-byte.subx.html#L405'>_test-input-buffered-file</a> <a href='115write-byte.subx.html#L425'>_test-output-buffered-file</a>)
<span id="L348" class="LineNr">348 </span> <span class="subxComment"># check that the line just passed through</span>
<span id="L349" class="LineNr">349 </span> (<a href='115write-byte.subx.html#L81'>flush</a> <a href='115write-byte.subx.html#L425'>_test-output-buffered-file</a>)
<span id="L350" class="Folded">350 </span><span class="Folded">+-- 5 lines: #? # dump _test-output-stream ----------------------------------------------------------------------------------------------------------------------------</span>
<span id="L355" class="LineNr">355 </span> (<a href='109stream-equal.subx.html#L194'>check-stream-equal</a> <a href='115write-byte.subx.html#L287'>_test-output-stream</a> <span class="Constant">"@loop0x00000001:\n@loop0x00000002:\nab @break0x00000002/imm32 \n@break0x00000002:\ncd @loop0x00000001/imm32 \n@break0x00000001:\n"</span> <span class="Constant">"F - test-subx-braces-2"</span>)
<span id="L356" class="LineNr">356 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L357" class="LineNr">357 </span> 89/<- %esp 5/r32/ebp
<span id="L358" class="LineNr">358 </span> 5d/pop-to-ebp
<span id="L359" class="LineNr">359 </span> c3/return
</pre>
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