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< title > Mu - 117write-int-hex.subx< / title >
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< meta name = "Generator" content = "Vim/8.1" >
< meta name = "plugin-version" content = "vim8.1_v1" >
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< meta name = "syntax" content = "none" >
< meta name = "settings" content = "number_lines,use_css,no_foldcolumn,expand_tabs,line_ids,prevent_copy=" >
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a { color:inherit; }
* { font-size:12pt; font-size: 1em; }
.subxComment { color: #005faf; }
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.subxS2Comment { color: #8a8a8a; }
.LineNr { }
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< a href = 'https://github.com/akkartik/mu/blob/main/117write-int-hex.subx' > https://github.com/akkartik/mu/blob/main/117write-int-hex.subx< / a >
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< pre id = 'vimCodeElement' >
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< span id = "L1" class = "LineNr" > 1 < / span > < span class = "subxComment" > # Write out the (hex) textual representation of numbers.< / span >
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< span id = "L2" class = "LineNr" > 2 < / span >
< span id = "L3" class = "LineNr" > 3 < / span > == code
< span id = "L4" class = "LineNr" > 4 < / span > < span class = "subxComment" > # instruction effective address register displacement immediate< / span >
< span id = "L5" class = "LineNr" > 5 < / span > < span class = "subxS1Comment" > # . op subop mod rm32 base index scale r32< / span >
< span id = "L6" class = "LineNr" > 6 < / 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 = "L7" class = "LineNr" > 7 < / span >
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< span id = "L8" class = "LineNr" > 8 < / span > < span class = "subxComment" > # convert the lowest nibble of eax to ascii and return it in the lowest byte of eax< / span >
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< span id = "L9" class = "LineNr" > 9 < / span > < span class = "subxFunction" > to-hex-char< / span > : < span class = "subxComment" > # in/eax: int -> out/eax: int< / span >
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< span id = "L10" class = "LineNr" > 10 < / span > < span class = "subxComment" > # no error checking; accepts argument in eax< / span >
< span id = "L11" class = "LineNr" > 11 < / span > < span class = "subxComment" > # if (eax < = 9) return eax + '0'< / span >
< span id = "L12" class = "LineNr" > 12 < / span > 3d/compare-eax-with 0x9/imm32/9
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< span id = "L13" class = "LineNr" > 13 < / span > 7f/jump-if-> $to-hex-char:else/disp8
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< span id = "L14" class = "LineNr" > 14 < / span > 05/add-to-eax 0x30/imm32/0
< span id = "L15" class = "LineNr" > 15 < / span > c3/return
< span id = "L16" class = "LineNr" > 16 < / span > < span class = "Constant" > $to-hex-char:else< / span > :
< span id = "L17" class = "LineNr" > 17 < / span > < span class = "subxComment" > # otherwise return eax + 'a' - 10< / span >
< span id = "L18" class = "LineNr" > 18 < / span > 05/add-to-eax 0x57/imm32/a-10
< span id = "L19" class = "LineNr" > 19 < / span > c3/return
< span id = "L20" class = "LineNr" > 20 < / span >
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< span id = "L21" class = "LineNr" > 21 < / span > < span class = "subxFunction" > append-byte-hex< / span > : < span class = "subxComment" > # f: (addr stream byte), n: int< / span >
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< span id = "L22" class = "LineNr" > 22 < / span > < span class = "subxS1Comment" > # . prologue< / span >
< span id = "L23" class = "LineNr" > 23 < / span > 55/push-ebp
< span id = "L24" class = "LineNr" > 24 < / 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 = "L25" class = "LineNr" > 25 < / span > < span class = "subxS1Comment" > # . save registers< / span >
< span id = "L26" class = "LineNr" > 26 < / span > 50/push-eax
< span id = "L27" class = "LineNr" > 27 < / span > < span class = "subxComment" > # AL = convert upper nibble to hex< / span >
< span id = "L28" class = "LineNr" > 28 < / span > 8b/copy 1/mod/*+disp8 5/rm32/ebp < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > 0/r32/eax 0xc/disp8 < span class = "Normal" > . < / span > < span class = "subxComment" > # copy *(ebp+12) to eax< / span >
< span id = "L29" class = "LineNr" > 29 < / span > c1/shift 5/subop/logic-right 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 > 4/imm8 < span class = "subxComment" > # shift eax right by 4 bits, while padding zeroes< / span >
< span id = "L30" class = "LineNr" > 30 < / span > 25/and-eax 0xf/imm32
< span id = "L31" class = "LineNr" > 31 < / span > < span class = "subxS1Comment" > # . AL = to-hex-char(AL)< / span >
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< span id = "L32" class = "LineNr" > 32 < / span > e8/call < a href = '117write-int-hex.subx.html#L9' > to-hex-char< / a > /disp32
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< span id = "L33" class = "LineNr" > 33 < / span > < span class = "subxComment" > # append-byte(f, AL)< / span >
< span id = "L34" class = "LineNr" > 34 < / span > < span class = "subxS2Comment" > # . . push args< / span >
< span id = "L35" class = "LineNr" > 35 < / span > 50/push-eax
< span id = "L36" class = "LineNr" > 36 < / 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 = "L37" class = "LineNr" > 37 < / span > < span class = "subxS2Comment" > # . . call< / span >
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< span id = "L38" class = "LineNr" > 38 < / span > e8/call < a href = '115write-byte.subx.html#L12' > append-byte< / a > /disp32
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< span id = "L39" class = "LineNr" > 39 < / span > < span class = "subxS2Comment" > # . . discard args< / span >
< span id = "L40" class = "LineNr" > 40 < / 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 = "L41" class = "LineNr" > 41 < / span > < span class = "subxComment" > # AL = convert lower nibble to hex< / span >
< span id = "L42" class = "LineNr" > 42 < / span > 8b/copy 1/mod/*+disp8 5/rm32/ebp < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > 0/r32/eax 0xc/disp8 < span class = "Normal" > . < / span > < span class = "subxComment" > # copy *(ebp+12) to eax< / span >
< span id = "L43" class = "LineNr" > 43 < / span > 25/and-eax 0xf/imm32
< span id = "L44" class = "LineNr" > 44 < / span > < span class = "subxS1Comment" > # . AL = to-hex-char(AL)< / span >
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< span id = "L45" class = "LineNr" > 45 < / span > e8/call < a href = '117write-int-hex.subx.html#L9' > to-hex-char< / a > /disp32
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< span id = "L46" class = "LineNr" > 46 < / span > < span class = "subxComment" > # append-byte(f, AL)< / span >
< span id = "L47" class = "LineNr" > 47 < / span > < span class = "subxS2Comment" > # . . push args< / span >
< span id = "L48" class = "LineNr" > 48 < / span > 50/push-eax
< span id = "L49" class = "LineNr" > 49 < / 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 = "L50" class = "LineNr" > 50 < / span > < span class = "subxS2Comment" > # . . call< / span >
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< span id = "L51" class = "LineNr" > 51 < / span > e8/call < a href = '115write-byte.subx.html#L12' > append-byte< / a > /disp32
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< span id = "L52" class = "LineNr" > 52 < / span > < span class = "subxS2Comment" > # . . discard args< / span >
< span id = "L53" class = "LineNr" > 53 < / 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 = "L54" class = "LineNr" > 54 < / span > < span class = "Constant" > $append-byte-hex:end< / span > :
< span id = "L55" class = "LineNr" > 55 < / span > < span class = "subxS1Comment" > # . restore registers< / span >
< span id = "L56" class = "LineNr" > 56 < / span > 58/pop-to-eax
< span id = "L57" class = "LineNr" > 57 < / span > < span class = "subxS1Comment" > # . epilogue< / span >
< span id = "L58" class = "LineNr" > 58 < / 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 = "L59" class = "LineNr" > 59 < / span > 5d/pop-to-ebp
< span id = "L60" class = "LineNr" > 60 < / span > c3/return
< span id = "L61" class = "LineNr" > 61 < / span >
< span id = "L62" class = "LineNr" > 62 < / span > < span class = "subxTest" > test-append-byte-hex< / span > :
< span id = "L63" class = "LineNr" > 63 < / span > < span class = "subxH1Comment" > # - check that append-byte-hex adds the hex textual representation< / span >
< span id = "L64" class = "LineNr" > 64 < / span > < span class = "subxComment" > # setup< / span >
< span id = "L65" class = "LineNr" > 65 < / span > < span class = "subxS1Comment" > # . clear-stream(_test-stream)< / span >
< span id = "L66" class = "LineNr" > 66 < / span > < span class = "subxS2Comment" > # . . push args< / span >
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< span id = "L67" class = "LineNr" > 67 < / span > 68/push < a href = '108write.subx.html#L125' > _test-stream< / a > /imm32
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< span id = "L68" class = "LineNr" > 68 < / span > < span class = "subxS2Comment" > # . . call< / span >
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< span id = "L69" class = "LineNr" > 69 < / span > e8/call < a href = '106stream.subx.html#L20' > clear-stream< / a > /disp32
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< span id = "L70" class = "LineNr" > 70 < / span > < span class = "subxS2Comment" > # . . discard args< / span >
< span id = "L71" class = "LineNr" > 71 < / 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 = "L72" class = "LineNr" > 72 < / span > < span class = "subxComment" > # append-byte-hex(_test-stream, 0xa) # exercises digit, non-digit as well as leading zero< / span >
< span id = "L73" class = "LineNr" > 73 < / span > < span class = "subxS2Comment" > # . . push args< / span >
< span id = "L74" class = "LineNr" > 74 < / span > 68/push 0xa/imm32
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< span id = "L75" class = "LineNr" > 75 < / span > 68/push < a href = '108write.subx.html#L125' > _test-stream< / a > /imm32
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< span id = "L76" class = "LineNr" > 76 < / span > < span class = "subxS2Comment" > # . . call< / span >
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< span id = "L77" class = "LineNr" > 77 < / span > e8/call < a href = '117write-int-hex.subx.html#L21' > append-byte-hex< / a > /disp32
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< span id = "L78" class = "LineNr" > 78 < / span > < span class = "subxS2Comment" > # . . discard args< / span >
< span id = "L79" class = "LineNr" > 79 < / 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 = "L80" class = "LineNr" > 80 < / span > < span class = "subxComment" > # check-stream-equal(_test-stream, " 0a" , msg)< / span >
< span id = "L81" class = "LineNr" > 81 < / span > < span class = "subxS2Comment" > # . . push args< / span >
< span id = "L82" class = "LineNr" > 82 < / span > 68/push < span class = "Constant" > " F - test-append-byte-hex" < / span > /imm32
< span id = "L83" class = "LineNr" > 83 < / span > 68/push < span class = "Constant" > " 0a" < / span > /imm32
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< span id = "L84" class = "LineNr" > 84 < / span > 68/push < a href = '108write.subx.html#L125' > _test-stream< / a > /imm32
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< span id = "L85" class = "LineNr" > 85 < / span > < span class = "subxS2Comment" > # . . call< / span >
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< span id = "L86" class = "LineNr" > 86 < / span > e8/call < a href = '109stream-equal.subx.html#L194' > check-stream-equal< / a > /disp32
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< span id = "L87" class = "LineNr" > 87 < / span > < span class = "subxS2Comment" > # . . discard args< / span >
< span id = "L88" class = "LineNr" > 88 < / 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 = "L89" class = "LineNr" > 89 < / span > < span class = "subxS1Comment" > # . end< / span >
< span id = "L90" class = "LineNr" > 90 < / span > c3/return
< span id = "L91" class = "LineNr" > 91 < / span >
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< span id = "L92" class = "LineNr" > 92 < / span > < span class = "subxFunction" > write-int32-hex< / span > : < span class = "subxComment" > # f: (addr stream byte), n: int< / span >
< span id = "L93" class = "LineNr" > 93 < / span > < span class = "subxS1Comment" > # . prologue< / span >
< span id = "L94" class = "LineNr" > 94 < / span > 55/push-ebp
< span id = "L95" class = "LineNr" > 95 < / 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 = "L96" class = "LineNr" > 96 < / span > < span class = "Constant" > $write-int32-hex:hex-prefix< / span > :
< span id = "L97" class = "LineNr" > 97 < / span > < span class = "subxComment" > # write(f, " 0x" )< / span >
< span id = "L98" class = "LineNr" > 98 < / span > < span class = "subxS2Comment" > # . . push args< / span >
< span id = "L99" class = "LineNr" > 99 < / span > 68/push < span class = "Constant" > " 0x" < / span > /imm32
< span id = "L100" class = "LineNr" > 100 < / 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 = "L101" class = "LineNr" > 101 < / span > < span class = "subxS2Comment" > # . . call< / span >
< span id = "L102" class = "LineNr" > 102 < / span > e8/call < a href = '108write.subx.html#L11' > write< / a > /disp32
< span id = "L103" class = "LineNr" > 103 < / span > < span class = "subxS2Comment" > # . . discard args< / span >
< span id = "L104" class = "LineNr" > 104 < / 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 = "L105" class = "LineNr" > 105 < / span > < span class = "Constant" > $write-int32-hex:rest< / span > :
< span id = "L106" class = "LineNr" > 106 < / span > < span class = "subxComment" > # write-int32-hex-bits(f, n, 32)< / span >
< span id = "L107" class = "LineNr" > 107 < / span > < span class = "subxS2Comment" > # . . push args< / span >
< span id = "L108" class = "LineNr" > 108 < / span > 68/push 0x20/imm32
< span id = "L109" class = "LineNr" > 109 < / 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 > 0xc/disp8 < span class = "Normal" > . < / span > < span class = "subxComment" > # push *(ebp+12)< / span >
< span id = "L110" class = "LineNr" > 110 < / 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 = "L111" class = "LineNr" > 111 < / span > < span class = "subxS2Comment" > # . . call< / span >
< span id = "L112" class = "LineNr" > 112 < / span > e8/call < a href = '117write-int-hex.subx.html#L123' > write-int32-hex-bits< / a > /disp32
< span id = "L113" class = "LineNr" > 113 < / span > < span class = "subxS2Comment" > # . . discard args< / span >
< span id = "L114" class = "LineNr" > 114 < / 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 = "L115" class = "LineNr" > 115 < / span > < span class = "Constant" > $write-int32-hex:end< / span > :
< span id = "L116" class = "LineNr" > 116 < / span > < span class = "subxS1Comment" > # . epilogue< / span >
< span id = "L117" class = "LineNr" > 117 < / 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 = "L118" class = "LineNr" > 118 < / span > 5d/pop-to-ebp
< span id = "L119" class = "LineNr" > 119 < / span > c3/return
< span id = "L120" class = "LineNr" > 120 < / span >
< span id = "L121" class = "LineNr" > 121 < / span > < span class = "subxComment" > # print rightmost 'bits' of 'n'< / span >
< span id = "L122" class = "LineNr" > 122 < / span > < span class = "subxComment" > # bits must be multiple of 4< / span >
< span id = "L123" class = "LineNr" > 123 < / span > < span class = "subxFunction" > write-int32-hex-bits< / span > : < span class = "subxComment" > # f: (addr stream byte), n: int, bits: int< / span >
< span id = "L124" class = "LineNr" > 124 < / span > < span class = "subxComment" > # pseudocode:< / span >
< span id = "L125" class = "LineNr" > 125 < / span > < span class = "subxComment" > # bits -= 4< / span >
< span id = "L126" class = "LineNr" > 126 < / span > < span class = "subxComment" > # while true< / span >
< span id = "L127" class = "LineNr" > 127 < / span > < span class = "subxComment" > # if (bits < 0) break< / span >
< span id = "L128" class = "LineNr" > 128 < / span > < span class = "subxComment" > # eax = n > > bits< / span >
< span id = "L129" class = "LineNr" > 129 < / span > < span class = "subxComment" > # eax = eax & 0xf< / span >
< span id = "L130" class = "LineNr" > 130 < / span > < span class = "subxComment" > # append-byte(f, AL)< / span >
< span id = "L131" class = "LineNr" > 131 < / span > < span class = "subxComment" > # bits -= 4< / span >
< span id = "L132" class = "LineNr" > 132 < / span > < span class = "subxComment" > #< / span >
< span id = "L133" class = "LineNr" > 133 < / span > < span class = "subxS1Comment" > # . prologue< / span >
< span id = "L134" class = "LineNr" > 134 < / span > 55/push-ebp
< span id = "L135" class = "LineNr" > 135 < / 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 = "L136" class = "LineNr" > 136 < / span > < span class = "subxS1Comment" > # . save registers< / span >
< span id = "L137" class = "LineNr" > 137 < / span > 50/push-eax
< span id = "L138" class = "LineNr" > 138 < / span > 51/push-ecx
< span id = "L139" class = "LineNr" > 139 < / span > < span class = "subxComment" > # ecx = bits-4< / span >
< span id = "L140" class = "LineNr" > 140 < / span > 8b/copy 1/mod/*+disp8 5/rm32/ebp < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > 1/r32/ecx 0x10/disp8 < span class = "Normal" > . < / span > < span class = "subxComment" > # copy *(ebp+16) to ecx< / span >
< span id = "L141" class = "LineNr" > 141 < / span > 81 5/subop/subtract 3/mod/direct 1/rm32/ecx < 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" > # subtract from ecx< / span >
< span id = "L142" class = "LineNr" > 142 < / span > < span class = "Constant" > $write-int32-hex-bits:loop< / span > :
< span id = "L143" class = "LineNr" > 143 < / span > < span class = "subxComment" > # if (bits < 0) break< / span >
< span id = "L144" class = "LineNr" > 144 < / span > 81 7/subop/compare 3/mod/direct 1/rm32/ecx < 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" > # compare ecx< / span >
< span id = "L145" class = "LineNr" > 145 < / span > 7c/jump-if-< $write-int32-hex-bits:end/disp8
< span id = "L146" class = "LineNr" > 146 < / span > < span class = "subxComment" > # eax = n > > bits< / span >
< span id = "L147" class = "LineNr" > 147 < / span > 8b/copy 1/mod/*+disp8 5/rm32/ebp < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > < span class = "Normal" > . < / span > 0/r32/eax 0xc/disp8 < span class = "Normal" > . < / span > < span class = "subxComment" > # copy *(ebp+12) to eax< / span >
< span id = "L148" class = "LineNr" > 148 < / span > d3/> > ecx 5/subop/pad-zeroes 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 > < span class = "Normal" > . < / span > < span class = "subxComment" > # shift eax right by ecx bits, padding zeroes< / span >
< span id = "L149" class = "LineNr" > 149 < / span > < span class = "subxComment" > # eax = to-hex-char(AL)< / span >
< span id = "L150" class = "LineNr" > 150 < / span > 25/and-eax 0xf/imm32
< span id = "L151" class = "LineNr" > 151 < / span > e8/call < a href = '117write-int-hex.subx.html#L9' > to-hex-char< / a > /disp32
< span id = "L152" class = "LineNr" > 152 < / span > < span class = "subxComment" > # append-byte(f, AL)< / span >
< span id = "L153" class = "LineNr" > 153 < / span > < span class = "subxS2Comment" > # . . push args< / span >
< span id = "L154" class = "LineNr" > 154 < / span > 50/push-eax
< span id = "L155" class = "LineNr" > 155 < / 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 = "L156" class = "LineNr" > 156 < / span > < span class = "subxS2Comment" > # . . call< / span >
< span id = "L157" class = "LineNr" > 157 < / span > e8/call < a href = '115write-byte.subx.html#L12' > append-byte< / a > /disp32
< span id = "L158" class = "LineNr" > 158 < / span > < span class = "subxS2Comment" > # . . discard args< / span >
< span id = "L159" class = "LineNr" > 159 < / 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 = "L160" class = "LineNr" > 160 < / span > < span class = "subxComment" > # bits -= 4< / span >
< span id = "L161" class = "LineNr" > 161 < / span > 81 5/subop/subtract 3/mod/direct 1/rm32/ecx < 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" > # subtract from ecx< / span >
< span id = "L162" class = "LineNr" > 162 < / span > eb/jump $write-int32-hex-bits:< span class = "Constant" > loop< / span > /disp8
< span id = "L163" class = "LineNr" > 163 < / span > < span class = "Constant" > $write-int32-hex-bits:end< / span > :
< span id = "L164" class = "LineNr" > 164 < / span > < span class = "subxS1Comment" > # . restore registers< / span >
< span id = "L165" class = "LineNr" > 165 < / span > 59/pop-to-ecx
< span id = "L166" class = "LineNr" > 166 < / span > 58/pop-to-eax
< span id = "L167" class = "LineNr" > 167 < / span > < span class = "subxS1Comment" > # . epilogue< / span >
< span id = "L168" class = "LineNr" > 168 < / 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 = "L169" class = "LineNr" > 169 < / span > 5d/pop-to-ebp
< span id = "L170" class = "LineNr" > 170 < / span > c3/return
< span id = "L171" class = "LineNr" > 171 < / span >
< span id = "L172" class = "LineNr" > 172 < / span > < span class = "subxTest" > test-write-int32-hex< / span > :
< span id = "L173" class = "LineNr" > 173 < / span > < span class = "subxH1Comment" > # - check that write-int32-hex prints the hex textual representation< / span >
< span id = "L174" class = "LineNr" > 174 < / span > < span class = "subxComment" > # setup< / span >
< span id = "L175" class = "LineNr" > 175 < / span > < span class = "subxS1Comment" > # . clear-stream(_test-stream)< / span >
< span id = "L176" class = "LineNr" > 176 < / span > < span class = "subxS2Comment" > # . . push args< / span >
< span id = "L177" class = "LineNr" > 177 < / span > 68/push < a href = '108write.subx.html#L125' > _test-stream< / a > /imm32
< span id = "L178" class = "LineNr" > 178 < / span > < span class = "subxS2Comment" > # . . call< / span >
< span id = "L179" class = "LineNr" > 179 < / span > e8/call < a href = '106stream.subx.html#L20' > clear-stream< / a > /disp32
< span id = "L180" class = "LineNr" > 180 < / span > < span class = "subxS2Comment" > # . . discard args< / span >
< span id = "L181" class = "LineNr" > 181 < / 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 = "L182" class = "LineNr" > 182 < / span > < span class = "subxComment" > # write-int32-hex(_test-stream, 0x8899aa)< / span >
< span id = "L183" class = "LineNr" > 183 < / span > < span class = "subxS2Comment" > # . . push args< / span >
< span id = "L184" class = "LineNr" > 184 < / span > 68/push 0x8899aa/imm32
< span id = "L185" class = "LineNr" > 185 < / span > 68/push < a href = '108write.subx.html#L125' > _test-stream< / a > /imm32
< span id = "L186" class = "LineNr" > 186 < / span > < span class = "subxS2Comment" > # . . call< / span >
< span id = "L187" class = "LineNr" > 187 < / span > e8/call < a href = '117write-int-hex.subx.html#L92' > write-int32-hex< / a > /disp32
< span id = "L188" class = "LineNr" > 188 < / span > < span class = "subxS2Comment" > # . . discard args< / span >
< span id = "L189" class = "LineNr" > 189 < / 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 = "L190" class = "LineNr" > 190 < / span > < span class = "subxComment" > # check-stream-equal(_test-stream, " 0x008899aa" , msg)< / span >
< span id = "L191" class = "LineNr" > 191 < / span > < span class = "subxS2Comment" > # . . push args< / span >
< span id = "L192" class = "LineNr" > 192 < / span > 68/push < span class = "Constant" > " F - test-write-int32-hex" < / span > /imm32
< span id = "L193" class = "LineNr" > 193 < / span > 68/push < span class = "Constant" > " 0x008899aa" < / span > /imm32
< span id = "L194" class = "LineNr" > 194 < / span > 68/push < a href = '108write.subx.html#L125' > _test-stream< / a > /imm32
< span id = "L195" class = "LineNr" > 195 < / span > < span class = "subxS2Comment" > # . . call< / span >
< span id = "L196" class = "LineNr" > 196 < / span > e8/call < a href = '109stream-equal.subx.html#L194' > check-stream-equal< / a > /disp32
< span id = "L197" class = "LineNr" > 197 < / span > < span class = "subxS2Comment" > # . . discard args< / span >
< span id = "L198" class = "LineNr" > 198 < / 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 = "L199" class = "LineNr" > 199 < / span > < span class = "subxS1Comment" > # . end< / span >
< span id = "L200" class = "LineNr" > 200 < / span > c3/return
< span id = "L201" class = "LineNr" > 201 < / span >
< span id = "L202" class = "LineNr" > 202 < / span > < span class = "subxS2Comment" > # . . vim: nowrap:textwidth=0< / span >
2019-05-20 08:44:06 +00:00
< / pre >
< / body >
< / html >
<!-- vim: set foldmethod=manual : -->