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<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="Comment">//: Operands can refer to bitfields smaller than a byte. This layer packs</span>
<span id="L2" class="LineNr"> 2 </span><span class="Comment">//: operands into their containing bytes in the right order.</span>
<span id="L3" class="LineNr"> 3 </span>
<span id="L4" class="LineNr"> 4 </span><span class="Delimiter">:(scenario pack_immediate_constants)</span>
<span id="L5" class="LineNr"> 5 </span>== <span class="Constant">0x1</span>
<span id="L6" class="LineNr"> 6 </span><span class="Comment"># instruction effective address operand displacement immediate</span>
<span id="L7" class="LineNr"> 7 </span><span class="Comment"># op subop mod rm32 base index scale r32</span>
<span id="L8" class="LineNr"> 8 </span><span class="Comment"># 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes</span>
<span id="L9" class="LineNr"> 9 </span> bb <span class="Constant">0x2a</span>/imm32 <span class="Comment"># copy 42 to EBX</span>
<span id="L10" class="LineNr"> 10 </span><span class="traceContains">+transform: packing instruction 'bb 0x2a/imm32'</span>
<span id="L11" class="LineNr"> 11 </span><span class="traceContains">+transform: instruction after packing: 'bb 2a 00 00 00'</span>
<span id="L12" class="LineNr"> 12 </span><span class="traceContains">+run: copy <a href='011run.cc.html#L253'>imm32</a> 0x0000002a to <a href='010vm.cc.html#L16'>EBX</a></span>
<span id="L13" class="LineNr"> 13 </span>
<span id="L14" class="LineNr"> 14 </span><span class="Delimiter">:(scenario pack_disp8)</span>
<span id="L15" class="LineNr"> 15 </span>== <span class="Constant">0x1</span>
<span id="L16" class="LineNr"> 16 </span><span class="Constant">74</span> <span class="Constant">2</span>/disp8 <span class="Comment"># jump 2 bytes away if ZF is set</span>
<span id="L17" class="LineNr"> 17 </span><span class="traceContains">+transform: packing instruction '74 2/disp8'</span>
<span id="L18" class="LineNr"> 18 </span><span class="traceContains">+transform: instruction after packing: '74 02'</span>
<span id="L19" class="LineNr"> 19 </span>
<span id="L20" class="LineNr"> 20 </span><span class="Delimiter">:(scenarios transform)</span>
<span id="L21" class="LineNr"> 21 </span><span class="Delimiter">:(scenario pack_disp8_negative)</span>
<span id="L22" class="LineNr"> 22 </span>== <span class="Constant">0x1</span>
<span id="L23" class="LineNr"> 23 </span><span class="Comment"># running this will cause an infinite loop</span>
<span id="L24" class="LineNr"> 24 </span><span class="Constant">74</span> -<span class="Constant">1</span>/disp8 <span class="Comment"># jump 1 byte before if ZF is set</span>
<span id="L25" class="LineNr"> 25 </span><span class="traceContains">+transform: packing instruction '74 -1/disp8'</span>
<span id="L26" class="LineNr"> 26 </span><span class="traceContains">+transform: instruction after packing: '74 ff'</span>
<span id="L27" class="LineNr"> 27 </span><span class="Delimiter">:(scenarios run)</span>
<span id="L28" class="LineNr"> 28 </span>
<span id="L29" class="LineNr"> 29 </span><span class="Delimiter">:(scenario pack_modrm_imm32)</span>
<span id="L30" class="LineNr"> 30 </span>== <span class="Constant">0x1</span>
<span id="L31" class="LineNr"> 31 </span><span class="Comment"># instruction effective address operand displacement immediate</span>
<span id="L32" class="LineNr"> 32 </span><span class="Comment"># op subop mod rm32 base index scale r32</span>
<span id="L33" class="LineNr"> 33 </span><span class="Comment"># 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes</span>
<span id="L34" class="LineNr"> 34 </span> <span class="Constant">81</span> <span class="Constant">0</span>/add/subop <span class="Constant">3</span>/mod/direct <span class="Constant">3</span>/ebx/rm32 <span class="Constant">1</span>/imm32 <span class="Comment"># add 1 to EBX</span>
<span id="L35" class="LineNr"> 35 </span><span class="traceContains">+transform: packing instruction '81 0/add/subop 3/mod/direct 3/ebx/rm32 1/imm32'</span>
<span id="L36" class="LineNr"> 36 </span><span class="traceContains">+transform: instruction after packing: '81 c3 01 00 00 00'</span>
<span id="L37" class="LineNr"> 37 </span>
<span id="L38" class="LineNr"> 38 </span><span class="Delimiter">:(scenario pack_imm32_large)</span>
<span id="L39" class="LineNr"> 39 </span>== <span class="Constant">0x1</span>
<span id="L40" class="LineNr"> 40 </span>b9 <span class="Constant">0x080490a7</span>/imm32 <span class="Comment"># copy to ECX</span>
<span id="L41" class="LineNr"> 41 </span><span class="traceContains">+transform: packing instruction 'b9 0x080490a7/imm32'</span>
<span id="L42" class="LineNr"> 42 </span><span class="traceContains">+transform: instruction after packing: 'b9 a7 90 04 08'</span>
<span id="L43" class="LineNr"> 43 </span>
<span id="L44" class="LineNr"> 44 </span><span class="Delimiter">:(before "End Transforms")</span>
<span id="L45" class="LineNr"> 45 </span><a href='011run.cc.html#L184'>Transform</a><span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>pack_operands<span class="Delimiter">);</span>
<span id="L46" class="LineNr"> 46 </span>
<span id="L47" class="LineNr"> 47 </span><span class="Delimiter">:(code)</span>
<span id="L48" class="LineNr"> 48 </span><span class="Normal">void</span> pack_operands<span class="Delimiter">(</span>program& p<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L49" class="LineNr"> 49 </span> <a href='003trace.cc.html#L190'>trace</a><span class="Delimiter">(</span><span class="Constant">99</span><span class="Delimiter">,</span> <span class="Constant">"transform"</span><span class="Delimiter">)</span> << <span class="Constant">"-- pack operands"</span> << <a href='003trace.cc.html#L215'>end</a><span class="Delimiter">();</span>
<span id="L50" class="LineNr"> 50 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>p<span class="Delimiter">.</span><a href='011run.cc.html#L97'>segments</a><span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
<span id="L51" class="LineNr"> 51 </span> segment& code = p<span class="Delimiter">.</span><a href='011run.cc.html#L97'>segments</a><span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
<span id="L52" class="LineNr"> 52 </span> <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i < <a href='001help.cc.html#L157'>SIZE</a><span class="Delimiter">(</span>code<span class="Delimiter">.</span><a href='011run.cc.html#L106'>lines</a><span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L53" class="LineNr"> 53 </span> line& inst = code<span class="Delimiter">.</span><a href='011run.cc.html#L106'>lines</a><span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
<span id="L54" class="LineNr"> 54 </span> <span class="Normal">if</span> <span class="Delimiter">(</span><a href='030check_operands.cc.html#L337'>all_hex_bytes</a><span class="Delimiter">(</span>inst<span class="Delimiter">))</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span id="L55" class="LineNr"> 55 </span> <a href='003trace.cc.html#L190'>trace</a><span class="Delimiter">(</span><span class="Constant">99</span><span class="Delimiter">,</span> <span class="Constant">"transform"</span><span class="Delimiter">)</span> << <span class="Constant">"packing instruction '"</span> << to_string<span class="Delimiter">(</span><span class="Comment">/*</span><span class="Comment">with metadata</span><span class="Comment">*/</span>inst<span class="Delimiter">)</span> << <span class="Constant">"'"</span> << <a href='003trace.cc.html#L215'>end</a><span class="Delimiter">();</span>
<span id="L56" class="LineNr"> 56 </span> pack_operands<span class="Delimiter">(</span>inst<span class="Delimiter">);</span>
<span id="L57" class="LineNr"> 57 </span> <a href='003trace.cc.html#L190'>trace</a><span class="Delimiter">(</span><span class="Constant">99</span><span class="Delimiter">,</span> <span class="Constant">"transform"</span><span class="Delimiter">)</span> << <span class="Constant">"instruction after packing: '"</span> << to_string<span class="Delimiter">(</span><span class="Comment">/*</span><span class="Comment">without metadata</span><span class="Comment">*/</span>inst<span class="Delimiter">.</span>words<span class="Delimiter">)</span> << <span class="Constant">"'"</span> << <a href='003trace.cc.html#L215'>end</a><span class="Delimiter">();</span>
<span id="L58" class="LineNr"> 58 </span> <span class="Delimiter">}</span>
<span id="L59" class="LineNr"> 59 </span><span class="Delimiter">}</span>
<span id="L60" class="LineNr"> 60 </span>
<span id="L61" class="LineNr"> 61 </span><span class="Normal">void</span> pack_operands<span class="Delimiter">(</span>line& inst<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L62" class="LineNr"> 62 </span> <a href='011run.cc.html#L110'>line</a> new_inst<span class="Delimiter">;</span>
<span id="L63" class="LineNr"> 63 </span> <a href='032pack_operands.cc.html#L71'>add_opcodes</a><span class="Delimiter">(</span>inst<span class="Delimiter">,</span> new_inst<span class="Delimiter">);</span>
<span id="L64" class="LineNr"> 64 </span> <a href='032pack_operands.cc.html#L79'>add_modrm_byte</a><span class="Delimiter">(</span>inst<span class="Delimiter">,</span> new_inst<span class="Delimiter">);</span>
<span id="L65" class="LineNr"> 65 </span> <a href='032pack_operands.cc.html#L105'>add_sib_byte</a><span class="Delimiter">(</span>inst<span class="Delimiter">,</span> new_inst<span class="Delimiter">);</span>
<span id="L66" class="LineNr"> 66 </span> <a href='032pack_operands.cc.html#L127'>add_disp_bytes</a><span class="Delimiter">(</span>inst<span class="Delimiter">,</span> new_inst<span class="Delimiter">);</span>
<span id="L67" class="LineNr"> 67 </span> <a href='032pack_operands.cc.html#L139'>add_imm_bytes</a><span class="Delimiter">(</span>inst<span class="Delimiter">,</span> new_inst<span class="Delimiter">);</span>
<span id="L68" class="LineNr"> 68 </span> inst<span class="Delimiter">.</span><a href='011run.cc.html#L111'>words</a><span class="Delimiter">.</span>swap<span class="Delimiter">(</span>new_inst<span class="Delimiter">.</span><a href='011run.cc.html#L111'>words</a><span class="Delimiter">);</span>
<span id="L69" class="LineNr"> 69 </span><span class="Delimiter">}</span>
<span id="L70" class="LineNr"> 70 </span>
<span id="L71" class="LineNr"> 71 </span><span class="Normal">void</span> <a href='032pack_operands.cc.html#L71'>add_opcodes</a><span class="Delimiter">(</span><span class="Normal">const</span> line& in<span class="Delimiter">,</span> line& out<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L72" class="LineNr"> 72 </span> out<span class="Delimiter">.</span><a href='011run.cc.html#L111'>words</a><span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>in<span class="Delimiter">.</span><a href='011run.cc.html#L111'>words</a><span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">));</span>
<span id="L73" class="LineNr"> 73 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>in<span class="Delimiter">.</span><a href='011run.cc.html#L111'>words</a><span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span><a href='011run.cc.html#L117'>data</a> == <span class="Constant">"0f"</span> || in<span class="Delimiter">.</span><a href='011run.cc.html#L111'>words</a><span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span><a href='011run.cc.html#L117'>data</a> == <span class="Constant">"f3"</span><span class="Delimiter">)</span>
<span id="L74" class="LineNr"> 74 </span> out<span class="Delimiter">.</span><a href='011run.cc.html#L111'>words</a><span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>in<span class="Delimiter">.</span><a href='011run.cc.html#L111'>words</a><span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">));</span>
<span id="L75" class="LineNr"> 75 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>in<span class="Delimiter">.</span><a href='011run.cc.html#L111'>words</a><span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span><a href='011run.cc.html#L117'>data</a> == <span class="Constant">"f3"</span> && in<span class="Delimiter">.</span><a href='011run.cc.html#L111'>words</a><span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span><a href='011run.cc.html#L117'>data</a> == <span class="Constant">"0f"</span><span class="Delimiter">)</span>
<span id="L76" class="LineNr"> 76 </span> out<span class="Delimiter">.</span><a href='011run.cc.html#L111'>words</a><span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>in<span class="Delimiter">.</span><a href='011run.cc.html#L111'>words</a><span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">2</span><span class="Delimiter">));</span>
<span id="L77" class="LineNr"> 77 </span><span class="Delimiter">}</span>
<span id="L78" class="LineNr"> 78 </span>
<span id="L79" class="LineNr"> 79 </span><span class="Normal">void</span> <a href='032pack_operands.cc.html#L79'>add_modrm_byte</a><span class="Delimiter">(</span><span class="Normal">const</span> line& in<span class="Delimiter">,</span> line& out<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L80" class="LineNr"> 80 </span> <span class="Normal">uint8_t</span> mod=<span class="Constant">0</span><span class="Delimiter">,</span> reg_subop=<span class="Constant">0</span><span class="Delimiter">,</span> rm32=<span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L81" class="LineNr"> 81 </span> <span class="Normal">bool</span> emit =<span class="Constant"> false</span><span class="Delimiter">;</span>
<span id="L82" class="LineNr"> 82 </span> <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i < <a href='001help.cc.html#L157'>SIZE</a><span class="Delimiter">(</span>in<span class="Delimiter">.</span><a href='011run.cc.html#L111'>words</a><span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L83" class="LineNr"> 83 </span> <span class="Normal">const</span> word& curr = in<span class="Delimiter">.</span><a href='011run.cc.html#L111'>words</a><span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
<span id="L84" class="LineNr"> 84 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>has_metadata<span class="Delimiter">(</span>curr<span class="Delimiter">,</span> <span class="Constant">"mod"</span><span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span id="L85" class="LineNr"> 85 </span> mod = <a href='011run.cc.html#L222'>hex_byte</a><span class="Delimiter">(</span>curr<span class="Delimiter">.</span><a href='011run.cc.html#L117'>data</a><span class="Delimiter">);</span>
<span id="L86" class="LineNr"> 86 </span> emit =<span class="Constant"> true</span><span class="Delimiter">;</span>
<span id="L87" class="LineNr"> 87 </span> <span class="Delimiter">}</span>
<span id="L88" class="LineNr"> 88 </span> <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>has_metadata<span class="Delimiter">(</span>curr<span class="Delimiter">,</span> <span class="Constant">"rm32"</span><span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span id="L89" class="LineNr"> 89 </span> rm32 = <a href='011run.cc.html#L222'>hex_byte</a><span class="Delimiter">(</span>curr<span class="Delimiter">.</span><a href='011run.cc.html#L117'>data</a><span class="Delimiter">);</span>
<span id="L90" class="LineNr"> 90 </span> emit =<span class="Constant"> true</span><span class="Delimiter">;</span>
<span id="L91" class="LineNr"> 91 </span> <span class="Delimiter">}</span>
<span id="L92" class="LineNr"> 92 </span> <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>has_metadata<span class="Delimiter">(</span>curr<span class="Delimiter">,</span> <span class="Constant">"r32"</span><span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span id="L93" class="LineNr"> 93 </span> reg_subop = <a href='011run.cc.html#L222'>hex_byte</a><span class="Delimiter">(</span>curr<span class="Delimiter">.</span><a href='011run.cc.html#L117'>data</a><span class="Delimiter">);</span>
<span id="L94" class="LineNr"> 94 </span> emit =<span class="Constant"> true</span><span class="Delimiter">;</span>
<span id="L95" class="LineNr"> 95 </span> <span class="Delimiter">}</span>
<span id="L96" class="LineNr"> 96 </span> <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>has_metadata<span class="Delimiter">(</span>curr<span class="Delimiter">,</span> <span class="Constant">"subop"</span><span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span id="L97" class="LineNr"> 97 </span> reg_subop = <a href='011run.cc.html#L222'>hex_byte</a><span class="Delimiter">(</span>curr<span class="Delimiter">.</span><a href='011run.cc.html#L117'>data</a><span class="Delimiter">);</span>
<span id="L98" class="LineNr"> 98 </span> emit =<span class="Constant"> true</span><span class="Delimiter">;</span>
<span id="L99" class="LineNr"> 99 </span> <span class="Delimiter">}</span>
<span id="L100" class="LineNr">100 </span> <span class="Delimiter">}</span>
<span id="L101" class="LineNr">101 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>emit<span class="Delimiter">)</span>
<span id="L102" class="LineNr">102 </span> out<span class="Delimiter">.</span><a href='011run.cc.html#L111'>words</a><span class="Delimiter">.</span>push_back<span class="Delimiter">(</span><a href='032pack_operands.cc.html#L166'>hex_byte_text</a><span class="Delimiter">((</span>mod << <span class="Constant">6</span><span class="Delimiter">)</span> | <span class="Delimiter">(</span>reg_subop << <span class="Constant">3</span><span class="Delimiter">)</span> | rm32<span class="Delimiter">));</span>
<span id="L103" class="LineNr">103 </span><span class="Delimiter">}</span>
<span id="L104" class="LineNr">104 </span>
<span id="L105" class="LineNr">105 </span><span class="Normal">void</span> <a href='032pack_operands.cc.html#L105'>add_sib_byte</a><span class="Delimiter">(</span><span class="Normal">const</span> line& in<span class="Delimiter">,</span> line& out<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L106" class="LineNr">106 </span> <span class="Normal">uint8_t</span> scale=<span class="Constant">0</span><span class="Delimiter">,</span> index=<span class="Constant">0</span><span class="Delimiter">,</span> base=<span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L107" class="LineNr">107 </span> <span class="Normal">bool</span> emit =<span class="Constant"> false</span><span class="Delimiter">;</span>
<span id="L108" class="LineNr">108 </span> <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i < <a href='001help.cc.html#L157'>SIZE</a><span class="Delimiter">(</span>in<span class="Delimiter">.</span><a href='011run.cc.html#L111'>words</a><span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L109" class="LineNr">109 </span> <span class="Normal">const</span> word& curr = in<span class="Delimiter">.</span><a href='011run.cc.html#L111'>words</a><span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
<span id="L110" class="LineNr">110 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>has_metadata<span class="Delimiter">(</span>curr<span class="Delimiter">,</span> <span class="Constant">"scale"</span><span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span id="L111" class="LineNr">111 </span> scale = <a href='011run.cc.html#L222'>hex_byte</a><span class="Delimiter">(</span>curr<span class="Delimiter">.</span><a href='011run.cc.html#L117'>data</a><span class="Delimiter">);</span>
<span id="L112" class="LineNr">112 </span> emit =<span class="Constant"> true</span><span class="Delimiter">;</span>
<span id="L113" class="LineNr">113 </span> <span class="Delimiter">}</span>
<span id="L114" class="LineNr">114 </span> <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>has_metadata<span class="Delimiter">(</span>curr<span class="Delimiter">,</span> <span class="Constant">"index"</span><span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span id="L115" class="LineNr">115 </span> index = <a href='011run.cc.html#L222'>hex_byte</a><span class="Delimiter">(</span>curr<span class="Delimiter">.</span><a href='011run.cc.html#L117'>data</a><span class="Delimiter">);</span>
<span id="L116" class="LineNr">116 </span> emit =<span class="Constant"> true</span><span class="Delimiter">;</span>
<span id="L117" class="LineNr">117 </span> <span class="Delimiter">}</span>
<span id="L118" class="LineNr">118 </span> <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>has_metadata<span class="Delimiter">(</span>curr<span class="Delimiter">,</span> <span class="Constant">"base"</span><span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span id="L119" class="LineNr">119 </span> base = <a href='011run.cc.html#L222'>hex_byte</a><span class="Delimiter">(</span>curr<span class="Delimiter">.</span><a href='011run.cc.html#L117'>data</a><span class="Delimiter">);</span>
<span id="L120" class="LineNr">120 </span> emit =<span class="Constant"> true</span><span class="Delimiter">;</span>
<span id="L121" class="LineNr">121 </span> <span class="Delimiter">}</span>
<span id="L122" class="LineNr">122 </span> <span class="Delimiter">}</span>
<span id="L123" class="LineNr">123 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>emit<span class="Delimiter">)</span>
<span id="L124" class="LineNr">124 </span> out<span class="Delimiter">.</span><a href='011run.cc.html#L111'>words</a><span class="Delimiter">.</span>push_back<span class="Delimiter">(</span><a href='032pack_operands.cc.html#L166'>hex_byte_text</a><span class="Delimiter">((</span>scale << <span class="Constant">6</span><span class="Delimiter">)</span> | <span class="Delimiter">(</span>index << <span class="Constant">3</span><span class="Delimiter">)</span> | base<span class="Delimiter">));</span>
<span id="L125" class="LineNr">125 </span><span class="Delimiter">}</span>
<span id="L126" class="LineNr">126 </span>
<span id="L127" class="LineNr">127 </span><span class="Normal">void</span> <a href='032pack_operands.cc.html#L127'>add_disp_bytes</a><span class="Delimiter">(</span><span class="Normal">const</span> line& in<span class="Delimiter">,</span> line& out<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L128" class="LineNr">128 </span> <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i < <a href='001help.cc.html#L157'>SIZE</a><span class="Delimiter">(</span>in<span class="Delimiter">.</span><a href='011run.cc.html#L111'>words</a><span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L129" class="LineNr">129 </span> <span class="Normal">const</span> word& curr = in<span class="Delimiter">.</span><a href='011run.cc.html#L111'>words</a><span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
<span id="L130" class="LineNr">130 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>has_metadata<span class="Delimiter">(</span>curr<span class="Delimiter">,</span> <span class="Constant">"disp8"</span><span class="Delimiter">))</span>
<span id="L131" class="LineNr">131 </span> emit_hex_bytes<span class="Delimiter">(</span>out<span class="Delimiter">,</span> curr<span class="Delimiter">,</span> <span class="Constant">1</span><span class="Delimiter">);</span>
<span id="L132" class="LineNr">132 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>has_metadata<span class="Delimiter">(</span>curr<span class="Delimiter">,</span> <span class="Constant">"disp16"</span><span class="Delimiter">))</span>
<span id="L133" class="LineNr">133 </span> emit_hex_bytes<span class="Delimiter">(</span>out<span class="Delimiter">,</span> curr<span class="Delimiter">,</span> <span class="Constant">2</span><span class="Delimiter">);</span>
<span id="L134" class="LineNr">134 </span> <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>has_metadata<span class="Delimiter">(</span>curr<span class="Delimiter">,</span> <span class="Constant">"disp32"</span><span class="Delimiter">))</span>
<span id="L135" class="LineNr">135 </span> emit_hex_bytes<span class="Delimiter">(</span>out<span class="Delimiter">,</span> curr<span class="Delimiter">,</span> <span class="Constant">4</span><span class="Delimiter">);</span>
<span id="L136" class="LineNr">136 </span> <span class="Delimiter">}</span>
<span id="L137" class="LineNr">137 </span><span class="Delimiter">}</span>
<span id="L138" class="LineNr">138 </span>
<span id="L139" class="LineNr">139 </span><span class="Normal">void</span> <a href='032pack_operands.cc.html#L139'>add_imm_bytes</a><span class="Delimiter">(</span><span class="Normal">const</span> line& in<span class="Delimiter">,</span> line& out<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L140" class="LineNr">140 </span> <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i < <a href='001help.cc.html#L157'>SIZE</a><span class="Delimiter">(</span>in<span class="Delimiter">.</span><a href='011run.cc.html#L111'>words</a><span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L141" class="LineNr">141 </span> <span class="Normal">const</span> word& curr = in<span class="Delimiter">.</span><a href='011run.cc.html#L111'>words</a><span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
<span id="L142" class="LineNr">142 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>has_metadata<span class="Delimiter">(</span>curr<span class="Delimiter">,</span> <span class="Constant">"imm8"</span><span class="Delimiter">))</span>
<span id="L143" class="LineNr">143 </span> emit_hex_bytes<span class="Delimiter">(</span>out<span class="Delimiter">,</span> curr<span class="Delimiter">,</span> <span class="Constant">1</span><span class="Delimiter">);</span>
<span id="L144" class="LineNr">144 </span> <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>has_metadata<span class="Delimiter">(</span>curr<span class="Delimiter">,</span> <span class="Constant">"imm32"</span><span class="Delimiter">))</span>
<span id="L145" class="LineNr">145 </span> emit_hex_bytes<span class="Delimiter">(</span>out<span class="Delimiter">,</span> curr<span class="Delimiter">,</span> <span class="Constant">4</span><span class="Delimiter">);</span>
<span id="L146" class="LineNr">146 </span> <span class="Delimiter">}</span>
<span id="L147" class="LineNr">147 </span><span class="Delimiter">}</span>
<span id="L148" class="LineNr">148 </span>
<span id="L149" class="LineNr">149 </span><span class="Normal">void</span> emit_hex_bytes<span class="Delimiter">(</span>line& out<span class="Delimiter">,</span> <span class="Normal">const</span> word& w<span class="Delimiter">,</span> <span class="Normal">int</span> num<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L150" class="LineNr">150 </span> assert<span class="Delimiter">(</span>num <= <span class="Constant">4</span><span class="Delimiter">);</span>
<span id="L151" class="LineNr">151 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>!is_hex_int<span class="Delimiter">(</span>w<span class="Delimiter">.</span><a href='011run.cc.html#L117'>data</a><span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span id="L152" class="LineNr">152 </span> out<span class="Delimiter">.</span><a href='011run.cc.html#L111'>words</a><span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>w<span class="Delimiter">);</span>
<span id="L153" class="LineNr">153 </span> <span class="Identifier">return</span><span class="Delimiter">;</span>
<span id="L154" class="LineNr">154 </span> <span class="Delimiter">}</span>
<span id="L155" class="LineNr">155 </span> emit_hex_bytes<span class="Delimiter">(</span>out<span class="Delimiter">,</span> <span class="Normal">static_cast</span><<span class="Normal">uint32_t</span>><span class="Delimiter">(</span><a href='031check_operand_bounds.cc.html#L65'>parse_int</a><span class="Delimiter">(</span>w<span class="Delimiter">.</span><a href='011run.cc.html#L117'>data</a><span class="Delimiter">)),</span> num<span class="Delimiter">);</span>
<span id="L156" class="LineNr">156 </span><span class="Delimiter">}</span>
<span id="L157" class="LineNr">157 </span>
<span id="L158" class="LineNr">158 </span><span class="Normal">void</span> emit_hex_bytes<span class="Delimiter">(</span>line& out<span class="Delimiter">,</span> <span class="Normal">uint32_t</span> val<span class="Delimiter">,</span> <span class="Normal">int</span> num<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L159" class="LineNr">159 </span> assert<span class="Delimiter">(</span>num <= <span class="Constant">4</span><span class="Delimiter">);</span>
<span id="L160" class="LineNr">160 </span> <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i < num<span class="Delimiter">;</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L161" class="LineNr">161 </span> out<span class="Delimiter">.</span><a href='011run.cc.html#L111'>words</a><span class="Delimiter">.</span>push_back<span class="Delimiter">(</span><a href='032pack_operands.cc.html#L166'>hex_byte_text</a><span class="Delimiter">(</span>val & <span class="Constant">0xff</span><span class="Delimiter">));</span>
<span id="L162" class="LineNr">162 </span> val = val >> <span class="Constant">8</span><span class="Delimiter">;</span>
<span id="L163" class="LineNr">163 </span> <span class="Delimiter">}</span>
<span id="L164" class="LineNr">164 </span><span class="Delimiter">}</span>
<span id="L165" class="LineNr">165 </span>
<span id="L166" class="LineNr">166 </span><a href='011run.cc.html#L115'>word</a> <a href='032pack_operands.cc.html#L166'>hex_byte_text</a><span class="Delimiter">(</span><span class="Normal">uint8_t</span> val<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L167" class="LineNr">167 </span> ostringstream out<span class="Delimiter">;</span>
<span id="L168" class="LineNr">168 </span> out << <a href='010vm.cc.html#L238'>HEXBYTE</a> << <a href='010vm.cc.html#L241'>NUM</a><span class="Delimiter">(</span>val<span class="Delimiter">);</span>
<span id="L169" class="LineNr">169 </span> <a href='011run.cc.html#L115'>word</a> result<span class="Delimiter">;</span>
<span id="L170" class="LineNr">170 </span> result<span class="Delimiter">.</span><a href='011run.cc.html#L117'>data</a> = out<span class="Delimiter">.</span>str<span class="Delimiter">();</span>
<span id="L171" class="LineNr">171 </span> result<span class="Delimiter">.</span><a href='011run.cc.html#L116'>original</a> = out<span class="Delimiter">.</span>str<span class="Delimiter">()</span>+<span class="Constant">"/auto"</span><span class="Delimiter">;</span>
<span id="L172" class="LineNr">172 </span> <span class="Identifier">return</span> result<span class="Delimiter">;</span>
<span id="L173" class="LineNr">173 </span><span class="Delimiter">}</span>
<span id="L174" class="LineNr">174 </span>
<span id="L175" class="LineNr">175 </span>string to_string<span class="Delimiter">(</span><span class="Normal">const</span> vector<word>& in<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L176" class="LineNr">176 </span> ostringstream out<span class="Delimiter">;</span>
<span id="L177" class="LineNr">177 </span> <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i < <a href='001help.cc.html#L157'>SIZE</a><span class="Delimiter">(</span>in<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L178" class="LineNr">178 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>i > <span class="Constant">0</span><span class="Delimiter">)</span> out << <span class="Constant">' '</span><span class="Delimiter">;</span>
<span id="L179" class="LineNr">179 </span> out << in<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span><a href='011run.cc.html#L117'>data</a><span class="Delimiter">;</span>
<span id="L180" class="LineNr">180 </span> <span class="Delimiter">}</span>
<span id="L181" class="LineNr">181 </span> <span class="Identifier">return</span> out<span class="Delimiter">.</span>str<span class="Delimiter">();</span>
<span id="L182" class="LineNr">182 </span><span class="Delimiter">}</span>
<span id="L183" class="LineNr">183 </span>
<span id="L184" class="LineNr">184 </span><span class="Delimiter">:(scenario pack_immediate_constants_hex)</span>
<span id="L185" class="LineNr">185 </span>== <span class="Constant">0x1</span>
<span id="L186" class="LineNr">186 </span><span class="Comment"># instruction effective address operand displacement immediate</span>
<span id="L187" class="LineNr">187 </span><span class="Comment"># op subop mod rm32 base index scale r32</span>
<span id="L188" class="LineNr">188 </span><span class="Comment"># 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes</span>
<span id="L189" class="LineNr">189 </span> bb <span class="Constant">0x2a</span>/imm32 <span class="Comment"># copy 42 to EBX</span>
<span id="L190" class="LineNr">190 </span><span class="traceContains">+transform: packing instruction 'bb 0x2a/imm32'</span>
<span id="L191" class="LineNr">191 </span><span class="traceContains">+transform: instruction after packing: 'bb 2a 00 00 00'</span>
<span id="L192" class="LineNr">192 </span><span class="traceContains">+run: copy <a href='011run.cc.html#L253'>imm32</a> 0x0000002a to <a href='010vm.cc.html#L16'>EBX</a></span>
<span id="L193" class="LineNr">193 </span>
<span id="L194" class="LineNr">194 </span><span class="Delimiter">:(scenarios transform)</span>
<span id="L195" class="LineNr">195 </span><span class="Delimiter">:(scenario pack_silently_ignores_non_hex)</span>
<span id="L196" class="LineNr">196 </span>== <span class="Constant">0x1</span>
<span id="L197" class="LineNr">197 </span><span class="Comment"># instruction effective address operand displacement immediate</span>
<span id="L198" class="LineNr">198 </span><span class="Comment"># op subop mod rm32 base index scale r32</span>
<span id="L199" class="LineNr">199 </span><span class="Comment"># 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes</span>
<span id="L200" class="LineNr">200 </span> bb foo/imm32 <span class="Comment"># copy foo to EBX</span>
<span id="L201" class="LineNr">201 </span><span class="traceContains">+transform: packing instruction 'bb foo/imm32'</span>
<span id="L202" class="LineNr">202 </span><span class="Comment"># no change (we're just not printing metadata to the trace)</span>
<span id="L203" class="LineNr">203 </span><span class="traceContains">+transform: instruction after packing: 'bb foo'</span>
<span id="L204" class="LineNr">204 </span>$error: <span class="Constant">0</span>
<span id="L205" class="LineNr">205 </span><span class="Delimiter">:(scenarios run)</span>
</pre>
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