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< title > Mu - subx/016index_addressing.cc< / title >
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< a href = 'https://github.com/akkartik/mu/blob/master/subx/016index_addressing.cc' > https://github.com/akkartik/mu/blob/master/subx/016index_addressing.cc< / a >
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< pre id = 'vimCodeElement' >
< span id = "L1" class = "LineNr" > 1 < / span > < span class = "Comment" > //: operating on memory at the address provided by some register plus optional scale and offset< / span >
< span id = "L2" class = "LineNr" > 2 < / span >
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< span id = "L3" class = "LineNr" > 3 < / span > < span class = "Delimiter" > :(code)< / span >
< span id = "L4" class = "LineNr" > 4 < / span > < span class = "Normal" > void< / span > < a href = '016index_addressing.cc.html#L4' > test_add_r32_to_mem_at_r32_with_sib< / a > < span class = "Delimiter" > ()< / span > < span class = "Delimiter" > {< / span >
< span id = "L5" class = "LineNr" > 5 < / span > < span class = "Special" > < a href = '010---vm.cc.html#L28' > Reg< / a > < / span > [EBX]< span class = "Delimiter" > .< / span > i = < span class = "Constant" > 0x10< / span > < span class = "Delimiter" > ;< / span >
< span id = "L6" class = "LineNr" > 6 < / span > < span class = "Special" > < a href = '010---vm.cc.html#L28' > Reg< / a > < / span > [EAX]< span class = "Delimiter" > .< / span > i = < span class = "Constant" > 0x2000< / span > < span class = "Delimiter" > ;< / span >
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< span id = "L7" class = "LineNr" > 7 < / span > < a href = '011run.cc.html#L85' > run< / a > < span class = "Delimiter" > (< / span >
< span id = "L8" class = "LineNr" > 8 < / span > < span class = "Constant" > " == code 0x1\n" < / span >
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< span id = "L9" class = "LineNr" > 9 < / span > < span class = "Comment" > // op ModR/M SIB displacement immediate< / span >
< span id = "L10" class = "LineNr" > 10 < / span > < span class = "Constant" > " 01 1c 20 \n" < / span > < span class = "Comment" > // add EBX to *EAX< / span >
< span id = "L11" class = "LineNr" > 11 < / span > < span class = "Comment" > // ModR/M in binary: 00 (indirect mode) 011 (src EBX) 100 (dest in SIB)< / span >
< span id = "L12" class = "LineNr" > 12 < / span > < span class = "Comment" > // SIB in binary: 00 (scale 1) 100 (no index) 000 (base EAX)< / span >
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< span id = "L13" class = "LineNr" > 13 < / span > < span class = "Constant" > " == data 0x2000\n" < / span >
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< span id = "L14" class = "LineNr" > 14 < / span > < span class = "Constant" > " 01 00 00 00\n" < / span > < span class = "Comment" > // 0x00000001< / span >
< span id = "L15" class = "LineNr" > 15 < / span > < span class = "Delimiter" > );< / span >
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< span id = "L16" class = "LineNr" > 16 < / span > < a href = '003trace.cc.html#L290' > CHECK_TRACE_CONTENTS< / a > < span class = "Delimiter" > (< / span >
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< span id = "L17" class = "LineNr" > 17 < / span > < span class = "Constant" > " run: add < a href = '010---vm.cc.html#L16' > EBX< / a > to r/m32\n" < / span >
< span id = "L18" class = "LineNr" > 18 < / span > < span class = "Constant" > " run: effective address is initially 0x00002000 (EAX)\n" < / span >
< span id = "L19" class = "LineNr" > 19 < / span > < span class = "Constant" > " run: effective address is 0x00002000\n" < / span >
< span id = "L20" class = "LineNr" > 20 < / span > < span class = "Constant" > " run: storing 0x00000011\n" < / span >
< span id = "L21" class = "LineNr" > 21 < / span > < span class = "Delimiter" > );< / span >
< span id = "L22" class = "LineNr" > 22 < / span > < span class = "Delimiter" > }< / span >
< span id = "L23" class = "LineNr" > 23 < / span >
< span id = "L24" class = "LineNr" > 24 < / span > < span class = "Delimiter" > :(before " End Mod 0 Special-cases(addr)" )< / span >
< span id = "L25" class = "LineNr" > 25 < / span > < span class = "Normal" > case< / span > < span class = "Constant" > 4< / span > : < span class = "Comment" > // exception: mod 0b00 rm 0b100 => incoming SIB (scale-index-base) byte< / span >
< span id = "L26" class = "LineNr" > 26 < / span > addr = < a href = '016index_addressing.cc.html#L29' > effective_address_from_sib< / a > < span class = "Delimiter" > (< / span > mod< span class = "Delimiter" > );< / span >
< span id = "L27" class = "LineNr" > 27 < / span > < span class = "Identifier" > break< / span > < span class = "Delimiter" > ;< / span >
< span id = "L28" class = "LineNr" > 28 < / span > < span class = "Delimiter" > :(code)< / span >
< span id = "L29" class = "LineNr" > 29 < / span > < span class = "Normal" > uint32_t< / span > < a href = '016index_addressing.cc.html#L29' > effective_address_from_sib< / a > < span class = "Delimiter" > (< / span > < span class = "Normal" > uint8_t< / span > mod< span class = "Delimiter" > )< / span > < span class = "Delimiter" > {< / span >
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< span id = "L30" class = "LineNr" > 30 < / span > < span class = "Normal" > const< / span > < span class = "Normal" > uint8_t< / span > sib = < a href = '010---vm.cc.html#L339' > next< / a > < span class = "Delimiter" > ();< / span >
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< span id = "L31" class = "LineNr" > 31 < / span > < span class = "Normal" > const< / span > < span class = "Normal" > uint8_t< / span > base = sib& < span class = "Constant" > 0x7< / span > < span class = "Delimiter" > ;< / span >
< span id = "L32" class = "LineNr" > 32 < / span > < span class = "Normal" > uint32_t< / span > addr = < span class = "Constant" > 0< / span > < span class = "Delimiter" > ;< / span >
< span id = "L33" class = "LineNr" > 33 < / span > < span class = "Normal" > if< / span > < span class = "Delimiter" > (< / span > base != < a href = '010---vm.cc.html#L18' > EBP< / a > || mod != < span class = "Constant" > 0< / span > < span class = "Delimiter" > )< / span > < span class = "Delimiter" > {< / span >
< span id = "L34" class = "LineNr" > 34 < / span > addr = < span class = "Special" > < a href = '010---vm.cc.html#L28' > Reg< / a > < / span > [base]< span class = "Delimiter" > .< / span > u< span class = "Delimiter" > ;< / span >
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< span id = "L35" class = "LineNr" > 35 < / span > < a href = '003trace.cc.html#L96' > trace< / a > < span class = "Delimiter" > (< / span > < span class = "Special" > Callstack_depth< / span > +< span class = "Constant" > 1< / span > < span class = "Delimiter" > ,< / span > < span class = "Constant" > " run" < / span > < span class = "Delimiter" > )< / span > < < < span class = "Constant" > " effective address is initially 0x" < / span > < < < a href = '010---vm.cc.html#L409' > HEXWORD< / a > < < addr < < < span class = "Constant" > " (" < / span > < < < a href = '013direct_addressing.cc.html#L136' > rname< / a > < span class = "Delimiter" > (< / span > base< span class = "Delimiter" > )< / span > < < < span class = "Constant" > " )" < / span > < < end< span class = "Delimiter" > ();< / span >
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< span id = "L36" class = "LineNr" > 36 < / span > < span class = "Delimiter" > }< / span >
< span id = "L37" class = "LineNr" > 37 < / span > < span class = "Normal" > else< / span > < span class = "Delimiter" > {< / span >
< span id = "L38" class = "LineNr" > 38 < / span > < span class = "Comment" > // base == EBP & & mod == 0< / span >
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< span id = "L39" class = "LineNr" > 39 < / span > addr = < a href = '011run.cc.html#L432' > next32< / a > < span class = "Delimiter" > ();< / span > < span class = "Comment" > // ignore base< / span >
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< span id = "L40" class = "LineNr" > 40 < / span > < a href = '003trace.cc.html#L96' > trace< / a > < span class = "Delimiter" > (< / span > < span class = "Special" > Callstack_depth< / span > +< span class = "Constant" > 1< / span > < span class = "Delimiter" > ,< / span > < span class = "Constant" > " run" < / span > < span class = "Delimiter" > )< / span > < < < span class = "Constant" > " effective address is initially 0x" < / span > < < < a href = '010---vm.cc.html#L409' > HEXWORD< / a > < < addr < < < span class = "Constant" > " (disp32)" < / span > < < end< span class = "Delimiter" > ();< / span >
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< span id = "L41" class = "LineNr" > 41 < / span > < span class = "Delimiter" > }< / span >
< span id = "L42" class = "LineNr" > 42 < / span > < span class = "Normal" > const< / span > < span class = "Normal" > uint8_t< / span > index = < span class = "Delimiter" > (< / span > sib> > < span class = "Constant" > 3< / span > < span class = "Delimiter" > )< / span > & < span class = "Constant" > 0x7< / span > < span class = "Delimiter" > ;< / span >
< span id = "L43" class = "LineNr" > 43 < / span > < span class = "Normal" > if< / span > < span class = "Delimiter" > (< / span > index == < a href = '010---vm.cc.html#L17' > ESP< / a > < span class = "Delimiter" > )< / span > < span class = "Delimiter" > {< / span >
< span id = "L44" class = "LineNr" > 44 < / span > < span class = "Comment" > // ignore index and scale< / span >
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< span id = "L45" class = "LineNr" > 45 < / span > < a href = '003trace.cc.html#L96' > trace< / a > < span class = "Delimiter" > (< / span > < span class = "Special" > Callstack_depth< / span > +< span class = "Constant" > 1< / span > < span class = "Delimiter" > ,< / span > < span class = "Constant" > " run" < / span > < span class = "Delimiter" > )< / span > < < < span class = "Constant" > " effective address is 0x" < / span > < < < a href = '010---vm.cc.html#L409' > HEXWORD< / a > < < addr < < end< span class = "Delimiter" > ();< / span >
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< span id = "L46" class = "LineNr" > 46 < / span > < span class = "Delimiter" > }< / span >
< span id = "L47" class = "LineNr" > 47 < / span > < span class = "Normal" > else< / span > < span class = "Delimiter" > {< / span >
< span id = "L48" class = "LineNr" > 48 < / span > < span class = "Normal" > const< / span > < span class = "Normal" > uint8_t< / span > scale = < span class = "Delimiter" > (< / span > < span class = "Constant" > 1< / span > < < < span class = "Delimiter" > (< / span > sib> > < span class = "Constant" > 6< / span > < span class = "Delimiter" > ));< / span >
< span id = "L49" class = "LineNr" > 49 < / span > addr += < span class = "Special" > < a href = '010---vm.cc.html#L28' > Reg< / a > < / span > [index]< span class = "Delimiter" > .< / span > i*scale< span class = "Delimiter" > ;< / span > < span class = "Comment" > // treat index register as signed. Maybe base as well? But we'll always ensure it's non-negative.< / span >
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< span id = "L50" class = "LineNr" > 50 < / span > < a href = '003trace.cc.html#L96' > trace< / a > < span class = "Delimiter" > (< / span > < span class = "Special" > Callstack_depth< / span > +< span class = "Constant" > 1< / span > < span class = "Delimiter" > ,< / span > < span class = "Constant" > " run" < / span > < span class = "Delimiter" > )< / span > < < < span class = "Constant" > " effective address is 0x" < / span > < < < a href = '010---vm.cc.html#L409' > HEXWORD< / a > < < addr < < < span class = "Constant" > " (after adding " < / span > < < < a href = '013direct_addressing.cc.html#L136' > rname< / a > < span class = "Delimiter" > (< / span > index< span class = "Delimiter" > )< / span > < < < span class = "Constant" > " *" < / span > < < < a href = '010---vm.cc.html#L411' > NUM< / a > < span class = "Delimiter" > (< / span > scale< span class = "Delimiter" > )< / span > < < < span class = "Constant" > " )" < / span > < < end< span class = "Delimiter" > ();< / span >
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< span id = "L51" class = "LineNr" > 51 < / span > < span class = "Delimiter" > }< / span >
< span id = "L52" class = "LineNr" > 52 < / span > < span class = "Identifier" > return< / span > addr< span class = "Delimiter" > ;< / span >
< span id = "L53" class = "LineNr" > 53 < / span > < span class = "Delimiter" > }< / span >
< span id = "L54" class = "LineNr" > 54 < / span >
< span id = "L55" class = "LineNr" > 55 < / span > < span class = "Delimiter" > :(code)< / span >
< span id = "L56" class = "LineNr" > 56 < / span > < span class = "Normal" > void< / span > < a href = '016index_addressing.cc.html#L56' > test_add_r32_to_mem_at_base_r32_index_r32< / a > < span class = "Delimiter" > ()< / span > < span class = "Delimiter" > {< / span >
< span id = "L57" class = "LineNr" > 57 < / span > < span class = "Special" > < a href = '010---vm.cc.html#L28' > Reg< / a > < / span > [EBX]< span class = "Delimiter" > .< / span > i = < span class = "Constant" > 0x10< / span > < span class = "Delimiter" > ;< / span > < span class = "Comment" > // source< / span >
< span id = "L58" class = "LineNr" > 58 < / span > < span class = "Special" > < a href = '010---vm.cc.html#L28' > Reg< / a > < / span > [EAX]< span class = "Delimiter" > .< / span > i = < span class = "Constant" > 0x1ffe< / span > < span class = "Delimiter" > ;< / span > < span class = "Comment" > // dest base< / span >
< span id = "L59" class = "LineNr" > 59 < / span > < span class = "Special" > < a href = '010---vm.cc.html#L28' > Reg< / a > < / span > [ECX]< span class = "Delimiter" > .< / span > i = < span class = "Constant" > 0x2< / span > < span class = "Delimiter" > ;< / span > < span class = "Comment" > // dest index< / span >
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< span id = "L60" class = "LineNr" > 60 < / span > < a href = '011run.cc.html#L85' > run< / a > < span class = "Delimiter" > (< / span >
< span id = "L61" class = "LineNr" > 61 < / span > < span class = "Constant" > " == code 0x1\n" < / span >
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< span id = "L62" class = "LineNr" > 62 < / span > < span class = "Comment" > // op ModR/M SIB displacement immediate< / span >
< span id = "L63" class = "LineNr" > 63 < / span > < span class = "Constant" > " 01 1c 08 \n" < / span > < span class = "Comment" > // add EBX to *(EAX+ECX)< / span >
< span id = "L64" class = "LineNr" > 64 < / span > < span class = "Comment" > // ModR/M in binary: 00 (indirect mode) 011 (src EBX) 100 (dest in SIB)< / span >
< span id = "L65" class = "LineNr" > 65 < / span > < span class = "Comment" > // SIB in binary: 00 (scale 1) 001 (index ECX) 000 (base EAX)< / span >
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< span id = "L66" class = "LineNr" > 66 < / span > < span class = "Constant" > " == data 0x2000\n" < / span >
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< span id = "L67" class = "LineNr" > 67 < / span > < span class = "Constant" > " 01 00 00 00\n" < / span > < span class = "Comment" > // 0x00000001< / span >
< span id = "L68" class = "LineNr" > 68 < / span > < span class = "Delimiter" > );< / span >
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< span id = "L69" class = "LineNr" > 69 < / span > < a href = '003trace.cc.html#L290' > CHECK_TRACE_CONTENTS< / a > < span class = "Delimiter" > (< / span >
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< span id = "L70" class = "LineNr" > 70 < / span > < span class = "Constant" > " run: add < a href = '010---vm.cc.html#L16' > EBX< / a > to r/m32\n" < / span >
< span id = "L71" class = "LineNr" > 71 < / span > < span class = "Constant" > " run: effective address is initially 0x00001ffe (EAX)\n" < / span >
< span id = "L72" class = "LineNr" > 72 < / span > < span class = "Constant" > " run: effective address is 0x00002000 (after adding ECX*1)\n" < / span >
< span id = "L73" class = "LineNr" > 73 < / span > < span class = "Constant" > " run: storing 0x00000011\n" < / span >
< span id = "L74" class = "LineNr" > 74 < / span > < span class = "Delimiter" > );< / span >
< span id = "L75" class = "LineNr" > 75 < / span > < span class = "Delimiter" > }< / span >
< span id = "L76" class = "LineNr" > 76 < / span >
< span id = "L77" class = "LineNr" > 77 < / span > < span class = "Delimiter" > :(code)< / span >
< span id = "L78" class = "LineNr" > 78 < / span > < span class = "Normal" > void< / span > < a href = '016index_addressing.cc.html#L78' > test_add_r32_to_mem_at_displacement_using_sib< / a > < span class = "Delimiter" > ()< / span > < span class = "Delimiter" > {< / span >
< span id = "L79" class = "LineNr" > 79 < / span > < span class = "Special" > < a href = '010---vm.cc.html#L28' > Reg< / a > < / span > [EBX]< span class = "Delimiter" > .< / span > i = < span class = "Constant" > 0x10< / span > < span class = "Delimiter" > ;< / span > < span class = "Comment" > // source< / span >
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< span id = "L80" class = "LineNr" > 80 < / span > < a href = '011run.cc.html#L85' > run< / a > < span class = "Delimiter" > (< / span >
< span id = "L81" class = "LineNr" > 81 < / span > < span class = "Constant" > " == code 0x1\n" < / span >
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< span id = "L82" class = "LineNr" > 82 < / span > < span class = "Comment" > // op ModR/M SIB displacement immediate< / span >
< span id = "L83" class = "LineNr" > 83 < / span > < span class = "Constant" > " 01 1c 25 00 20 00 00 \n" < / span > < span class = "Comment" > // add EBX to *0x2000< / span >
< span id = "L84" class = "LineNr" > 84 < / span > < span class = "Comment" > // ModR/M in binary: 00 (indirect mode) 011 (src EBX) 100 (dest in SIB)< / span >
< span id = "L85" class = "LineNr" > 85 < / span > < span class = "Comment" > // SIB in binary: 00 (scale 1) 100 (no index) 101 (not EBP but disp32)< / span >
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< span id = "L86" class = "LineNr" > 86 < / span > < span class = "Constant" > " == data 0x2000\n" < / span >
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< span id = "L87" class = "LineNr" > 87 < / span > < span class = "Constant" > " 01 00 00 00\n" < / span > < span class = "Comment" > // 0x00000001< / span >
< span id = "L88" class = "LineNr" > 88 < / span > < span class = "Delimiter" > );< / span >
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< span id = "L89" class = "LineNr" > 89 < / span > < a href = '003trace.cc.html#L290' > CHECK_TRACE_CONTENTS< / a > < span class = "Delimiter" > (< / span >
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< span id = "L90" class = "LineNr" > 90 < / span > < span class = "Constant" > " run: add < a href = '010---vm.cc.html#L16' > EBX< / a > to r/m32\n" < / span >
< span id = "L91" class = "LineNr" > 91 < / span > < span class = "Constant" > " run: effective address is initially 0x00002000 (disp32)\n" < / span >
< span id = "L92" class = "LineNr" > 92 < / span > < span class = "Constant" > " run: effective address is 0x00002000\n" < / span >
< span id = "L93" class = "LineNr" > 93 < / span > < span class = "Constant" > " run: storing 0x00000011\n" < / span >
< span id = "L94" class = "LineNr" > 94 < / span > < span class = "Delimiter" > );< / span >
< span id = "L95" class = "LineNr" > 95 < / span > < span class = "Delimiter" > }< / span >
< span id = "L96" class = "LineNr" > 96 < / span >
< span id = "L97" class = "LineNr" > 97 < / span > < span class = "Comment" > //:< / span >
< span id = "L98" class = "LineNr" > 98 < / span >
< span id = "L99" class = "LineNr" > 99 < / span > < span class = "Delimiter" > :(code)< / span >
< span id = "L100" class = "LineNr" > 100 < / span > < span class = "Normal" > void< / span > < a href = '016index_addressing.cc.html#L100' > test_add_r32_to_mem_at_base_r32_index_r32_plus_disp8< / a > < span class = "Delimiter" > ()< / span > < span class = "Delimiter" > {< / span >
< span id = "L101" class = "LineNr" > 101 < / span > < span class = "Special" > < a href = '010---vm.cc.html#L28' > Reg< / a > < / span > [EBX]< span class = "Delimiter" > .< / span > i = < span class = "Constant" > 0x10< / span > < span class = "Delimiter" > ;< / span > < span class = "Comment" > // source< / span >
< span id = "L102" class = "LineNr" > 102 < / span > < span class = "Special" > < a href = '010---vm.cc.html#L28' > Reg< / a > < / span > [EAX]< span class = "Delimiter" > .< / span > i = < span class = "Constant" > 0x1ff9< / span > < span class = "Delimiter" > ;< / span > < span class = "Comment" > // dest base< / span >
< span id = "L103" class = "LineNr" > 103 < / span > < span class = "Special" > < a href = '010---vm.cc.html#L28' > Reg< / a > < / span > [ECX]< span class = "Delimiter" > .< / span > i = < span class = "Constant" > 0x5< / span > < span class = "Delimiter" > ;< / span > < span class = "Comment" > // dest index< / span >
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< span id = "L104" class = "LineNr" > 104 < / span > < a href = '011run.cc.html#L85' > run< / a > < span class = "Delimiter" > (< / span >
< span id = "L105" class = "LineNr" > 105 < / span > < span class = "Constant" > " == code 0x1\n" < / span >
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< span id = "L106" class = "LineNr" > 106 < / span > < span class = "Comment" > // op ModR/M SIB displacement immediate< / span >
< span id = "L107" class = "LineNr" > 107 < / span > < span class = "Constant" > " 01 5c 08 02 \n" < / span > < span class = "Comment" > // add EBX to *(EAX+ECX+2)< / span >
< span id = "L108" class = "LineNr" > 108 < / span > < span class = "Comment" > // ModR/M in binary: 01 (indirect+disp8 mode) 011 (src EBX) 100 (dest in SIB)< / span >
< span id = "L109" class = "LineNr" > 109 < / span > < span class = "Comment" > // SIB in binary: 00 (scale 1) 001 (index ECX) 000 (base EAX)< / span >
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< span id = "L110" class = "LineNr" > 110 < / span > < span class = "Constant" > " == data 0x2000\n" < / span >
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< span id = "L111" class = "LineNr" > 111 < / span > < span class = "Constant" > " 01 00 00 00\n" < / span > < span class = "Comment" > // 0x00000001< / span >
< span id = "L112" class = "LineNr" > 112 < / span > < span class = "Delimiter" > );< / span >
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< span id = "L113" class = "LineNr" > 113 < / span > < a href = '003trace.cc.html#L290' > CHECK_TRACE_CONTENTS< / a > < span class = "Delimiter" > (< / span >
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< span id = "L114" class = "LineNr" > 114 < / span > < span class = "Constant" > " run: add < a href = '010---vm.cc.html#L16' > EBX< / a > to r/m32\n" < / span >
< span id = "L115" class = "LineNr" > 115 < / span > < span class = "Constant" > " run: effective address is initially 0x00001ff9 (EAX)\n" < / span >
< span id = "L116" class = "LineNr" > 116 < / span > < span class = "Constant" > " run: effective address is 0x00001ffe (after adding ECX*1)\n" < / span >
< span id = "L117" class = "LineNr" > 117 < / span > < span class = "Constant" > " run: effective address is 0x00002000 (after adding disp8)\n" < / span >
< span id = "L118" class = "LineNr" > 118 < / span > < span class = "Constant" > " run: storing 0x00000011\n" < / span >
< span id = "L119" class = "LineNr" > 119 < / span > < span class = "Delimiter" > );< / span >
< span id = "L120" class = "LineNr" > 120 < / span > < span class = "Delimiter" > }< / span >
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< span id = "L121" class = "LineNr" > 121 < / span >
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< span id = "L122" class = "LineNr" > 122 < / span > < span class = "Delimiter" > :(before " End Mod 1 Special-cases(addr)" )< / span >
< span id = "L123" class = "LineNr" > 123 < / span > < span class = "Normal" > case< / span > < span class = "Constant" > 4< / span > : < span class = "Comment" > // exception: mod 0b01 rm 0b100 => incoming SIB (scale-index-base) byte< / span >
< span id = "L124" class = "LineNr" > 124 < / span > addr = < a href = '016index_addressing.cc.html#L29' > effective_address_from_sib< / a > < span class = "Delimiter" > (< / span > mod< span class = "Delimiter" > );< / span >
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< span id = "L125" class = "LineNr" > 125 < / span > < span class = "Identifier" > break< / span > < span class = "Delimiter" > ;< / span >
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< span id = "L126" class = "LineNr" > 126 < / span >
< span id = "L127" class = "LineNr" > 127 < / span > < span class = "Comment" > //:< / span >
< span id = "L128" class = "LineNr" > 128 < / span >
< span id = "L129" class = "LineNr" > 129 < / span > < span class = "Delimiter" > :(code)< / span >
< span id = "L130" class = "LineNr" > 130 < / span > < span class = "Normal" > void< / span > < a href = '016index_addressing.cc.html#L130' > test_add_r32_to_mem_at_base_r32_index_r32_plus_disp32< / a > < span class = "Delimiter" > ()< / span > < span class = "Delimiter" > {< / span >
< span id = "L131" class = "LineNr" > 131 < / span > < span class = "Special" > < a href = '010---vm.cc.html#L28' > Reg< / a > < / span > [EBX]< span class = "Delimiter" > .< / span > i = < span class = "Constant" > 0x10< / span > < span class = "Delimiter" > ;< / span > < span class = "Comment" > // source< / span >
< span id = "L132" class = "LineNr" > 132 < / span > < span class = "Special" > < a href = '010---vm.cc.html#L28' > Reg< / a > < / span > [EAX]< span class = "Delimiter" > .< / span > i = < span class = "Constant" > 0x1ff9< / span > < span class = "Delimiter" > ;< / span > < span class = "Comment" > // dest base< / span >
< span id = "L133" class = "LineNr" > 133 < / span > < span class = "Special" > < a href = '010---vm.cc.html#L28' > Reg< / a > < / span > [ECX]< span class = "Delimiter" > .< / span > i = < span class = "Constant" > 0x5< / span > < span class = "Delimiter" > ;< / span > < span class = "Comment" > // dest index< / span >
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< span id = "L134" class = "LineNr" > 134 < / span > < a href = '011run.cc.html#L85' > run< / a > < span class = "Delimiter" > (< / span >
< span id = "L135" class = "LineNr" > 135 < / span > < span class = "Constant" > " == code 0x1\n" < / span >
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< span id = "L136" class = "LineNr" > 136 < / span > < span class = "Comment" > // op ModR/M SIB displacement immediate< / span >
< span id = "L137" class = "LineNr" > 137 < / span > < span class = "Constant" > " 01 9c 08 02 00 00 00 \n" < / span > < span class = "Comment" > // add EBX to *(EAX+ECX+2)< / span >
< span id = "L138" class = "LineNr" > 138 < / span > < span class = "Comment" > // ModR/M in binary: 10 (indirect+disp32 mode) 011 (src EBX) 100 (dest in SIB)< / span >
< span id = "L139" class = "LineNr" > 139 < / span > < span class = "Comment" > // SIB in binary: 00 (scale 1) 001 (index ECX) 000 (base EAX)< / span >
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< span id = "L140" class = "LineNr" > 140 < / span > < span class = "Constant" > " == data 0x2000\n" < / span >
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< span id = "L141" class = "LineNr" > 141 < / span > < span class = "Constant" > " 01 00 00 00\n" < / span > < span class = "Comment" > // 0x00000001< / span >
< span id = "L142" class = "LineNr" > 142 < / span > < span class = "Delimiter" > );< / span >
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< span id = "L143" class = "LineNr" > 143 < / span > < a href = '003trace.cc.html#L290' > CHECK_TRACE_CONTENTS< / a > < span class = "Delimiter" > (< / span >
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< span id = "L144" class = "LineNr" > 144 < / span > < span class = "Constant" > " run: add < a href = '010---vm.cc.html#L16' > EBX< / a > to r/m32\n" < / span >
< span id = "L145" class = "LineNr" > 145 < / span > < span class = "Constant" > " run: effective address is initially 0x00001ff9 (EAX)\n" < / span >
< span id = "L146" class = "LineNr" > 146 < / span > < span class = "Constant" > " run: effective address is 0x00001ffe (after adding ECX*1)\n" < / span >
< span id = "L147" class = "LineNr" > 147 < / span > < span class = "Constant" > " run: effective address is 0x00002000 (after adding disp32)\n" < / span >
< span id = "L148" class = "LineNr" > 148 < / span > < span class = "Constant" > " run: storing 0x00000011\n" < / span >
< span id = "L149" class = "LineNr" > 149 < / span > < span class = "Delimiter" > );< / span >
< span id = "L150" class = "LineNr" > 150 < / span > < span class = "Delimiter" > }< / span >
< span id = "L151" class = "LineNr" > 151 < / span >
< span id = "L152" class = "LineNr" > 152 < / span > < span class = "Delimiter" > :(before " End Mod 2 Special-cases(addr)" )< / span >
< span id = "L153" class = "LineNr" > 153 < / span > < span class = "Normal" > case< / span > < span class = "Constant" > 4< / span > : < span class = "Comment" > // exception: mod 0b10 rm 0b100 => incoming SIB (scale-index-base) byte< / span >
< span id = "L154" class = "LineNr" > 154 < / span > addr = < a href = '016index_addressing.cc.html#L29' > effective_address_from_sib< / a > < span class = "Delimiter" > (< / span > mod< span class = "Delimiter" > );< / span >
< span id = "L155" class = "LineNr" > 155 < / span > < span class = "Identifier" > break< / span > < span class = "Delimiter" > ;< / span >
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< / pre >
< / body >
< / html >
<!-- vim: set foldmethod=manual : -->