https://github.com/akkartik/mu/blob/master/015immediate_addressing.cc
1
2
3 :(before "End Initialize Op Names")
4 put_new(Name, "05", "add imm32 to EAX (add)");
5
6 :(before "End Single-Byte Opcodes")
7 case 0x05: {
8 int32_t signed_arg2 = next32();
9 trace(Callstack_depth+1, "run") << "add imm32 0x" << HEXWORD << signed_arg2 << " to EAX" << end();
10 int32_t signed_result = Reg[EAX].i + signed_arg2;
11 SF = (signed_result < 0);
12 ZF = (signed_result == 0);
13 int64_t signed_full_result = static_cast<int64_t>(Reg[EAX].i) + signed_arg2;
14 OF = (signed_result != signed_full_result);
15
16 uint32_t unsigned_arg2 = static_cast<uint32_t>(signed_arg2);
17 uint32_t unsigned_result = Reg[EAX].u + unsigned_arg2;
18 uint64_t unsigned_full_result = static_cast<uint64_t>(Reg[EAX].u) + unsigned_arg2;
19 CF = (unsigned_result != unsigned_full_result);
20 trace(Callstack_depth+1, "run") << "SF=" << SF << "; ZF=" << ZF << "; CF=" << CF << "; OF=" << OF << end();
21 Reg[EAX].i = signed_result;
22 trace(Callstack_depth+1, "run") << "storing 0x" << HEXWORD << Reg[EAX].i << end();
23 break;
24 }
25
26 :(code)
27 void test_add_imm32_to_EAX_signed_overflow() {
28 Reg[EAX].i = 0x7fffffff;
29 run(
30 "== code 0x1\n"
31
32 " 05 01 00 00 00 \n"
33 );
34 CHECK_TRACE_CONTENTS(
35 "run: add imm32 0x00000001 to EAX\n"
36 "run: SF=1; ZF=0; CF=0; OF=1\n"
37 "run: storing 0x80000000\n"
38 );
39 }
40
41 void test_add_imm32_to_EAX_unsigned_overflow() {
42 Reg[EAX].u = 0xffffffff;
43 Reg[EBX].u = 1;
44 run(
45 "== code 0x1\n"
46
47 " 05 01 00 00 00 \n"
48 );
49 CHECK_TRACE_CONTENTS(
50 "run: add imm32 0x00000001 to EAX\n"
51 "run: SF=0; ZF=1; CF=1; OF=0\n"
52 "run: storing 0x00000000\n"
53 );
54 }
55
56 void test_add_imm32_to_EAX_unsigned_and_signed_overflow() {
57 Reg[EAX].u = 0x80000000;
58 run(
59 "== code 0x1\n"
60
61 " 05 00 00 00 80 \n"
62 );
63 CHECK_TRACE_CONTENTS(
64 "run: add imm32 0x80000000 to EAX\n"
65 "run: SF=0; ZF=1; CF=1; OF=1\n"
66 "run: storing 0x00000000\n"
67 );
68 }
69
70
71
72 :(before "End Initialize Op Names")
73 put_new(Name, "81", "combine rm32 with imm32 based on subop (add/sub/and/or/xor/cmp)");
74
75 :(code)
76 void test_add_imm32_to_r32() {
77 Reg[EBX].i = 1;
78 run(
79 "== code 0x1\n"
80
81 " 81 c3 0a 0b 0c 0d\n"
82
83 );
84 CHECK_TRACE_CONTENTS(
85 "run: combine r/m32 with imm32\n"
86 "run: r/m32 is EBX\n"
87 "run: imm32 is 0x0d0c0b0a\n"
88 "run: subop add\n"
89 "run: storing 0x0d0c0b0b\n"
90 );
91 }
92
93 :(before "End Single-Byte Opcodes")
94 case 0x81: {
95 trace(Callstack_depth+1, "run") << "combine r/m32 with imm32" << end();
96 const uint8_t modrm = next();
97 int32_t* signed_arg1 = effective_address(modrm);
98 const int32_t signed_arg2 = next32();
99 trace(Callstack_depth+1, "run") << "imm32 is 0x" << HEXWORD << signed_arg2 << end();
100 const uint8_t subop = (modrm>>3)&0x7;
101 switch (subop) {
102 case 0: {
103 trace(Callstack_depth+1, pre { line-height: 125%; }
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<a href='https://github.com/akkartik/mu/blob/master/094next-word-or-string.subx'>https://github.com/akkartik/mu/blob/master/094next-word-or-string.subx</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span>== code
<span id="L2" class="LineNr"> 2 </span><span class="subxComment"># instruction effective address register displacement immediate</span>
<span id="L3" class="LineNr"> 3 </span><span class="subxS1Comment"># . op subop mod rm32 base index scale r32</span>
<span id="L4" class="LineNr"> 4 </span><span class="subxS1Comment"># . 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="L5" class="LineNr"> 5 </span>
<span id="L6" class="LineNr"> 6 </span><span class="subxComment"># (re)compute the bounds of the next word or string literal in the line</span>
<span id="L7" class="LineNr"> 7 </span><span class="subxComment"># return empty string on reaching end of file</span>
<span id="L8" class="LineNr"> 8 </span><span class="subxFunction">next-word-or-string</span>: <span class="subxComment"># line : (address stream byte), out : (address slice)</span>
<span id="L9" class="LineNr"> 9 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L10" class="LineNr"> 10 </span> 55/push-ebp
<span id="L11" class="LineNr"> 11 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span>
<span id="L12" class="LineNr"> 12 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L13" class="LineNr"> 13 </span> 50/push-eax
<span id="L14" class="LineNr"> 14 </span> 51/push-ecx
<span id="L15" class="LineNr"> 15 </span> 56/push-esi
<span id="L16" class="LineNr"> 16 </span> 57/push-edi
<span id="L17" class="LineNr"> 17 </span> <span class="subxComment"># esi = line</span>
<span id="L18" class="LineNr"> 18 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 6/r32/esi 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+8) to esi</span>
<span id="L19" class="LineNr"> 19 </span> <span class="subxComment"># edi = out</span>
<span id="L20" class="LineNr"> 20 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 7/r32/edi 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+12) to edi</span>
<span id="L21" class="LineNr"> 21 </span> <span class="subxComment"># skip-chars-matching(line, ' ')</span>
<span id="L22" class="LineNr"> 22 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L23" class="LineNr"> 23 </span> 68/push 0x20/imm32/space
<span id="L24" class="LineNr"> 24 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+8)</span>
<span id="L25" class="LineNr"> 25 </span> <span class="subxS2Comment"># . . call</span>
<span id="L26" class="LineNr"> 26 </span> e8/call <a href='073next-token.subx.html#L341'>skip-chars-matching</a>/disp32
<span id="L27" class="LineNr"> 27 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L28" class="LineNr"> 28 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span>
<span id="L29" class="LineNr"> 29 </span><span class="Constant">$next-word-or-string:check0</span>:
<span id="L30" class="LineNr"> 30 </span> <span class="subxComment"># if (line->read >= line->write) clear out and return</span>
<span id="L31" class="LineNr"> 31 </span> <span class="subxS1Comment"># . eax = line->read</span>
<span id="L32" class="LineNr"> 32 </span> 8b/copy 1/mod/*+disp8 6/rm32/esi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax 4/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(esi+4) to eax</span>
<span id="L33" class="LineNr"> 33 </span> <span class="subxS1Comment"># . if (eax < line->write) goto next check</span>
<span id="L34" class="LineNr"> 34 </span> 3b/compare 0/mod/indirect 6/rm32/esi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># compare eax with *esi</span>
<span id="L35" class="LineNr"> 35 </span> 7c/jump-if-lesser $next-word-or-string:check-for-comment/disp8
<span id="L36" class="LineNr"> 36 </span> <span class="subxS1Comment"># . return out = {0, 0}</span>
<span id="L37" class="LineNr"> 37 </span> c7 0/subop/copy 0/mod/direct 7/rm32/edi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/imm32 <span class="subxComment"># copy to *edi</span>
<span id="L38" class="LineNr"> 38 </span> c7 0/subop/copy 1/mod/*+disp8 7/rm32/edi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/disp8 0/imm32 <span class="subxComment"># copy to *(edi+4)</span>
<span id="L39" class="LineNr"> 39 </span> eb/jump $next-word-or-string:end/disp8
<span id="L40" class="LineNr"> 40 </span><span class="Constant">$next-word-or-string:check-for-comment</span>:
<span id="L41" class="LineNr"> 41 </span> <span class="subxComment"># out->start = &line->data[line->read]</span>
<span id="L42" class="LineNr"> 42 </span> 8b/copy 1/mod/*+disp8 6/rm32/esi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx 4/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(esi+4) to ecx</span>
<span id="L43" class="LineNr"> 43 </span> 8d/copy-address 1/mod/*+disp8 4/rm32/sib 6/base/esi 1/index/ecx <span class="Normal"> . </span> 0/r32/eax 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy esi+ecx+12 to eax</span>
<span id="L44" class="LineNr"> 44 </span> 89/copy 0/mod/indirect 7/rm32/edi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy eax to *edi</span>
<span id="L45" class="LineNr"> 45 </span> <span class="subxComment"># if (line->data[line->read] != '#') goto next check</span>
<span id="L46" class="LineNr"> 46 </span> <span class="subxS1Comment"># . eax = line->data[line->read]</span>
<span id="L47" class="LineNr"> 47 </span> 31/xor 3/mod/direct 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># clear eax</span>
<span id="L48" class="LineNr"> 48 </span> 8a/copy-byte 1/mod/*+disp8 4/rm32/sib 6/base/esi 1/index/ecx <span class="Normal"> . </span> 0/r32/AL 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy byte at *(esi+ecx+12) to AL</span>
<span id="L49" class="LineNr"> 49 </span> <span class="subxS1Comment"># . compare</span>
<span id="L50" class="LineNr"> 50 </span> 3d/compare-eax-and 0x23/imm32/pound
<span id="L51" class="LineNr"> 51 </span> 75/jump-if-not-equal $next-word-or-string:check-for-string-literal/disp8
<span id="L52" class="LineNr"> 52 </span><span class="Constant">$next-word-or-string:comment</span>:
<span id="L53" class="LineNr"> 53 </span> <span class="subxComment"># out->end = &line->data[line->write]</span>
<span id="L54" class="LineNr"> 54 </span> 8b/copy 0/mod/indirect 6/rm32/esi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy *esi to eax</span>
<span id="L55" class="LineNr"> 55 </span> 8d/copy-address 1/mod/*+disp8 4/rm32/sib 6/base/esi 0/index/eax <span class="Normal"> . </span> 0/r32/eax 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy esi+eax+12 to eax</span>
<span id="L56" class="LineNr"> 56 </span> 89/copy 1/mod/*+disp8 7/rm32/edi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax 4/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy eax to *(edi+4)</span>
<span id="L57" class="LineNr"> 57 </span> <span class="subxComment"># line->read = line->write # skip rest of line</span>
<span id="L58" class="LineNr"> 58 </span> 8b/copy 0/mod/indirect 6/rm32/esi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy *esi to eax</span>
<span id="L59" class="LineNr"> 59 </span> 89/copy 1/mod/*+disp8 6/rm32/esi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax 4/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy eax to *(esi+4)</span>
<span id="L60" class="LineNr"> 60 </span> <span class="subxComment"># return</span>
<span id="L61" class="LineNr"> 61 </span> eb/jump $next-word-or-string:end/disp8
<span id="L62" class="LineNr"> 62 </span><span class="Constant">$next-word-or-string:check-for-string-literal</span>:
<span id="L63" class="LineNr"> 63 </span> <span class="subxComment"># if (line->data[line->read] != '"') goto next check</span>
<span id="L64" class="LineNr"> 64 </span> <span class="subxS1Comment"># . eax = line->data[line->read]</span>
<span id="L65" class="LineNr"> 65 </span> 31/xor 3/mod/direct 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># clear eax</span>
<span id="L66" class="LineNr"> 66 </span> 8a/copy-byte 1/mod/*+disp8 4/rm32/sib 6/base/esi 1/index/ecx <span class="Normal"> . </span> 0/r32/AL 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy byte at *(esi+ecx+12) to AL</span>
<span id="L67" class="LineNr"> 67 </span> <span class="subxS1Comment"># . compare</span>
<span id="L68" class="LineNr"> 68 </span> 3d/compare-eax-and 0x22/imm32/dquote
<span id="L69" class="LineNr"> 69 </span> 75/jump-if-not-equal $next-word-or-string:regular-word/disp8
<span id="L70" class="LineNr"> 70 </span><span class="Constant">$next-word-or-string:string-literal</span>:
<span id="L71" class="LineNr"> 71 </span> <span class="subxComment"># skip-string(line)</span>
<span id="L72" class="LineNr"> 72 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L73" class="LineNr"> 73 </span> 56/push-esi
<span id="L74" class="LineNr"> 74 </span> <span class="subxS2Comment"># . . call</span>
<span id="L75" class="LineNr"> 75 </span> e8/call <a href='073next-token.subx.html#L1169'>skip-string</a>/disp32
<span id="L76" class="LineNr"> 76 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L77" class="LineNr"> 77 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span>
<span id="L78" class="LineNr"> 78 </span> <span class="subxComment"># fall through</span>
<span id="L79" class="LineNr"> 79 </span><span class="Constant">$next-word-or-string:regular-word</span>:
<span id="L80" class="LineNr"> 80 </span> <span class="subxComment"># skip-chars-not-matching-whitespace(line) # including trailing newline</span>
<span id="L81" class="LineNr"> 81 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L82" class="LineNr"> 82 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+8)</span>
<span id="L83" class="LineNr"> 83 </span> <span class="subxS2Comment"># . . call</span>
<span id="L84" class="LineNr"> 84 </span> e8/call <a href='073next-token.subx.html#L716'>skip-chars-not-matching-whitespace</a>/disp32
<span id="L85" class="LineNr"> 85 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L86" class="LineNr"> 86 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span>
<span id="L87" class="LineNr"> 87 </span> <span class="subxComment"># out->end = &line->data[line->read]</span>
<span id="L88" class="LineNr"> 88 </span> 8b/copy 1/mod/*+disp8 6/rm32/esi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx 4/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(esi+4) to ecx</span>
<span id="L89" class="LineNr"> 89 </span> 8d/copy-address 1/mod/*+disp8 4/rm32/sib 6/base/esi 1/index/ecx <span class="Normal"> . </span> 0/r32/eax 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy esi+ecx+12 to eax</span>
<span id="L90" class="LineNr"> 90 </span> 89/copy 1/mod/*+disp8 7/rm32/edi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax 4/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy eax to *(edi+4)</span>
<span id="L91" class="LineNr"> 91 </span><span class="Constant">$next-word-or-string:end</span>:
<span id="L92" class="LineNr"> 92 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L93" class="LineNr"> 93 </span> 5f/pop-to-edi
<span id="L94" class="LineNr"> 94 </span> 5e/pop-to-esi
<span id="L95" class="LineNr"> 95 </span> 59/pop-to-ecx
<span id="L96" class="LineNr"> 96 </span> 58/pop-to-eax
<span id="L97" class="LineNr"> 97 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L98" class="LineNr"> 98 </span> 89/copy 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebp to esp</span>
<span id="L99" class="LineNr"> 99 </span> 5d/pop-to-ebp
<span id="L100" class="LineNr">100 </span> c3/return
<span id="L101" class="LineNr">101 </span>
<span id="L102" class="LineNr">102 </span><span class="subxTest">test-next-word-or-string</span>:
<span id="L103" class="LineNr">103 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L104" class="LineNr">104 </span> 55/push-ebp
<span id="L105" class="LineNr">105 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span>
<span id="L106" class="LineNr">106 </span> <span class="subxComment"># setup</span>
<span id="L107" class="LineNr">107 </span> <span class="subxS1Comment"># . clear-stream(_test-input-stream)</span>
<span id="L108" class="LineNr">108 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L109" class="LineNr">109 </span> 68/push <a href='061read-byte.subx.html#L288'>_test-input-stream</a>/imm32
<span id="L110" class="LineNr">110 </span> <span class="subxS2Comment"># . . call</span>
<span id="L111" class="LineNr">111 </span> e8/call <a href='055stream.subx.html#L17'>clear-stream</a>/disp32
<span id="L112" class="LineNr">112 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L113" class="LineNr">113 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span>
<span id="L114" class="LineNr">114 </span> <span class="subxComment"># var slice/ecx = {0, 0}</span>
<span id="L115" class="LineNr">115 </span> 68/push 0/imm32/end
<span id="L116" class="LineNr">116 </span> 68/push 0/imm32/start
<span id="L117" class="LineNr">117 </span> 89/copy 3/mod/direct 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ecx</span>
<span id="L118" class="LineNr">118 </span> <span class="subxComment"># write(_test-input-stream, " ab")</span>
<span id="L119" class="LineNr">119 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L120" class="LineNr">120 </span> 68/push <span class="Constant">" ab"</span>/imm32
<span id="L121" class="LineNr">121 </span> 68/push <a href='061read-byte.subx.html#L288'>_test-input-stream</a>/imm32
<span id="L122" class="LineNr">122 </span> <span class="subxS2Comment"># . . call</span>
<span id="L123" class="LineNr">123 </span> e8/call <a href='057write.subx.html#L24'>write</a>/disp32
<span id="L124" class="LineNr">124 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L125" class="LineNr">125 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span>
<span id="L126" class="LineNr">126 </span> <span class="subxComment"># next-word-or-string(_test-input-stream, slice)</span>
<span id="L127" class="LineNr">127 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L128" class="LineNr">128 </span> 51/push-ecx
<span id="L129" class="LineNr">129 </span> 68/push <a href='061read-byte.subx.html#L288'>_test-input-stream</a>/imm32
<span id="L130" class="LineNr">130 </span> <span class="subxS2Comment"># . . call</span>
<span id="L131" class="LineNr">131 </span> e8/call <a href='094next-word-or-string.subx.html#L8'>next-word-or-string</a>/disp32
<span id="L132" class="LineNr">132 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L133" class="LineNr">133 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span>
<span id="L134" class="LineNr">134 </span> <span class="subxComment"># check-ints-equal(_test-input-stream->read, 4, msg)</span>
<span id="L135" class="LineNr">135 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L136" class="LineNr">136 </span> 68/push <span class="Constant">"F - <a href='094next-word-or-string.subx.html#L102'>test-next-word-or-string</a>/updates-stream-read-correctly"</span>/imm32
<span id="L137" class="LineNr">137 </span> 68/push 4/imm32
<span id="L138" class="LineNr">138 </span> b8/copy-to-eax <a href='061read-byte.subx.html#L288'>_test-input-stream</a>/imm32
<span id="L139" class="LineNr">139 </span> ff 6/subop/push 1/mod/*+disp8 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(eax+4)</span>
<span id="L140" class="LineNr">140 </span> <span class="subxS2Comment"># . . call</span>
<span id="L141" class="LineNr">141 </span> e8/call <a href='051test.subx.html#L24'>check-ints-equal</a>/disp32
<span id="L142" class="LineNr">142 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L143" class="LineNr">143 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/imm32 <span class="subxComment"># add to esp</span>
<span id="L144" class="LineNr">144 </span> <span class="subxComment"># check-ints-equal(slice->start - _test-input-stream->data, 2, msg)</span>
<span id="L145" class="LineNr">145 </span> <span class="subxS1Comment"># . check-ints-equal(slice->start - _test-input-stream, 14, msg)</span>
<span id="L146" class="LineNr">146 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L147" class="LineNr">147 </span> 68/push <span class="Constant">"F - <a href='094next-word-or-string.subx.html#L102'>test-next-word-or-string</a>: start"</span>/imm32
<span id="L148" class="LineNr">148 </span> 68/push 0xe/imm32
<span id="L149" class="LineNr">149 </span> <span class="subxS2Comment"># . . push slice->start - _test-input-stream</span>
<span id="L150" class="LineNr">150 </span> 8b/copy 0/mod/indirect 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy *ecx to eax</span>
<span id="L151" class="LineNr">151 </span> 81 5/subop/subtract 3/mod/direct 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <a href='061read-byte.subx.html#L288'>_test-input-stream</a>/imm32 <span class="subxComment"># subtract from eax</span>
<span id="L152" class="LineNr">152 </span> 50/push-eax
<span id="L153" class="LineNr">153 </span> <span class="subxS2Comment"># . . call</span>
<span id="L154" class="LineNr">154 </span> e8/call <a href='051test.subx.html#L24'>check-ints-equal</a>/disp32
<span id="L155" class="LineNr">155 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L156" class="LineNr">156 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/imm32 <span class="subxComment"># add to esp</span>
<span id="L157" class="LineNr">157 </span> <span class="subxComment"># check-ints-equal(slice->end - _test-input-stream->data, 4, msg)</span>
<span id="L158" class="LineNr">158 </span> <span class="subxS1Comment"># . check-ints-equal(slice->end - _test-input-stream, 16, msg)</span>
<span id="L159" class="LineNr">159 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L160" class="LineNr">160 </span> 68/push <span class="Constant">"F - <a href='094next-word-or-string.subx.html#L102'>test-next-word-or-string</a>: end"</span>/imm32
<span id="L161" class="LineNr">161 </span> 68/push 0x10/imm32
<span id="L162" class="LineNr">162 </span> <span class="subxS2Comment"># . . push slice->end - _test-input-stream</span>
<span id="L163" class="LineNr">163 </span> 8b/copy 1/mod/*+disp8 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax 4/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ecx+4) to eax</span>
<span id="L164" class="LineNr">164 </span> 81 5/subop/subtract 3/mod/direct 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <a href='061read-byte.subx.html#L288'>_test-input-stream</a>/imm32 <span class="subxComment"># subtract from eax</span>
<span id="L165" class="LineNr">165 </span> 50/push-eax
<span id="L166" class="LineNr">166 </span> <span class="subxS2Comment"># . . call</span>
<span id="L167" class="LineNr">167 </span> e8/call <a href='051test.subx.html#L24'>check-ints-equal</a>/disp32
<span id="L168" class="LineNr">168 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L169" class="LineNr">169 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/imm32 <span class="subxComment"># add to esp</span>
<span id="L170" class="LineNr">170 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L171" class="LineNr">171 </span> 89/copy 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebp to esp</span>
<span id="L172" class="LineNr">172 </span> 5d/pop-to-ebp
<span id="L173" class="LineNr">173 </span> c3/return
<span id="L174" class="LineNr">174 </span>
<span id="L175" class="LineNr">175 </span><span class="subxTest">test-next-word-or-string-returns-whole-comment</span>:
<span id="L176" class="LineNr">176 </span> <span class="subxS1Comment"># . prologue</span><