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< title > Mu - mandelbrot-fixed.mu< / title >
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< a href = 'https://github.com/akkartik/mu/blob/main/mandelbrot-fixed.mu' > https://github.com/akkartik/mu/blob/main/mandelbrot-fixed.mu< / a >
< pre id = 'vimCodeElement' >
< span id = "L1" class = "LineNr" > 1 < / span > < span class = "muComment" > # Mandelbrot set using fixed-point numbers.< / span >
< span id = "L2" class = "LineNr" > 2 < / span > < span class = "muComment" > #< / span >
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< span id = "L3" class = "LineNr" > 3 < / span > < span class = "muComment" > # Install:< / span >
< span id = "L4" class = "LineNr" > 4 < / span > < span class = "muComment" > # $ git clone < a href = "https://github.com/akkartik/mu" > https://github.com/akkartik/mu< / a > < / span >
< span id = "L5" class = "LineNr" > 5 < / span > < span class = "muComment" > # $ cd mu< / span >
< span id = "L6" class = "LineNr" > 6 < / span > < span class = "muComment" > # Build on Linux:< / span >
< span id = "L7" class = "LineNr" > 7 < / span > < span class = "muComment" > # $ ./translate mandelbrot-fixed.mu< / span >
< span id = "L8" class = "LineNr" > 8 < / span > < span class = "muComment" > # Build on other platforms (slow):< / span >
< span id = "L9" class = "LineNr" > 9 < / span > < span class = "muComment" > # $ ./translate_emulated mandelbrot-fixed.mu< / span >
< span id = "L10" class = "LineNr" > 10 < / span > < span class = "muComment" > # To run:< / span >
< span id = "L11" class = "LineNr" > 11 < / span > < span class = "muComment" > # $ qemu-system-i386 code.img< / span >
< span id = "L12" class = "LineNr" > 12 < / span >
< span id = "L13" class = "LineNr" > 13 < / span > < span class = "PreProc" > fn< / span > < span class = "muFunction" > < a href = 'mandelbrot-fixed.mu.html#L13' > main< / a > < / span > < a href = '500fake-screen.mu.html#L14' > screen< / a > : (addr < a href = '500fake-screen.mu.html#L14' > screen< / a > ), keyboard: (addr keyboard), data-disk: (addr disk) < span class = "Delimiter" > {< / span >
< span id = "L14" class = "LineNr" > 14 < / span > < a href = 'mandelbrot-fixed.mu.html#L111' > mandelbrot< / a > < a href = '500fake-screen.mu.html#L14' > screen< / a >
< span id = "L15" class = "LineNr" > 15 < / span > < span class = "Delimiter" > }< / span >
< span id = "L16" class = "LineNr" > 16 < / span >
< span id = "L17" class = "LineNr" > 17 < / span > < span class = "muComment" > # Since they still look like int types, we'll append a '-f' suffix to variable< / span >
< span id = "L18" class = "LineNr" > 18 < / span > < span class = "muComment" > # names to designate fixed-point numbers.< / span >
< span id = "L19" class = "LineNr" > 19 < / span >
< span id = "L20" class = "LineNr" > 20 < / span > < span class = "PreProc" > fn< / span > < span class = "muFunction" > < a href = 'mandelbrot-fixed.mu.html#L20' > int-to-fixed< / a > < / span > in: int< span class = "PreProc" > -> < / span > _/< span class = "Constant" > eax< / span > : int < span class = "Delimiter" > {< / span >
< span id = "L21" class = "LineNr" > 21 < / span > < span class = "PreProc" > var< / span > result-f/< span class = "Constant" > eax< / span > : int < span class = "Special" > < -< / span > copy in
< span id = "L22" class = "LineNr" > 22 < / span > result-f < span class = "Special" > < -< / span > shift-left < span class = "Constant" > 8< / span > /fixed-precision
< span id = "L23" class = "LineNr" > 23 < / span > < span class = "Delimiter" > {< / span >
< span id = "L24" class = "LineNr" > 24 < / span > < span class = "PreProc" > break-if-not-overflow< / span >
< span id = "L25" class = "LineNr" > 25 < / span > < a href = '501draw-text.mu.html#L481' > abort< / a > < span class = "Constant" > " int-to-fixed: overflow" < / span >
< span id = "L26" class = "LineNr" > 26 < / span > < span class = "Delimiter" > }< / span >
< span id = "L27" class = "LineNr" > 27 < / span > < span class = "PreProc" > return< / span > result-f
< span id = "L28" class = "LineNr" > 28 < / span > < span class = "Delimiter" > }< / span >
< span id = "L29" class = "LineNr" > 29 < / span >
< span id = "L30" class = "LineNr" > 30 < / span > < span class = "PreProc" > fn< / span > < span class = "muFunction" > < a href = 'mandelbrot-fixed.mu.html#L30' > fixed-to-int< / a > < / span > in-f: int< span class = "PreProc" > -> < / span > _/< span class = "Constant" > eax< / span > : int < span class = "Delimiter" > {< / span >
< span id = "L31" class = "LineNr" > 31 < / span > < span class = "PreProc" > var< / span > result/< span class = "Constant" > eax< / span > : int < span class = "Special" > < -< / span > copy in-f
< span id = "L32" class = "LineNr" > 32 < / span > result < span class = "Special" > < -< / span > shift-right-signed < span class = "Constant" > 8< / span > /fixed-precision
< span id = "L33" class = "LineNr" > 33 < / span > < span class = "PreProc" > return< / span > result
< span id = "L34" class = "LineNr" > 34 < / span > < span class = "Delimiter" > }< / span >
< span id = "L35" class = "LineNr" > 35 < / span >
< span id = "L36" class = "LineNr" > 36 < / span > < span class = "muComment" > # The process of throwing bits away always adjusts a number towards -infinity.< / span >
< span id = "L37" class = "LineNr" > 37 < / span > < span class = "PreProc" > fn< / span > < span class = "muTest" > < a href = 'mandelbrot-fixed.mu.html#L37' > test-fixed-conversion< / a > < / span > < span class = "Delimiter" > {< / span >
< span id = "L38" class = "LineNr" > 38 < / span > < span class = "muComment" > # 0< / span >
< span id = "L39" class = "LineNr" > 39 < / span > < span class = "PreProc" > var< / span > f/< span class = "Constant" > eax< / span > : int < span class = "Special" > < -< / span > < a href = 'mandelbrot-fixed.mu.html#L20' > int-to-fixed< / a > < span class = "Constant" > 0< / span >
< span id = "L40" class = "LineNr" > 40 < / span > < span class = "PreProc" > var< / span > result/< span class = "Constant" > eax< / span > : int < span class = "Special" > < -< / span > < a href = 'mandelbrot-fixed.mu.html#L30' > fixed-to-int< / a > f
< span id = "L41" class = "LineNr" > 41 < / span > < a href = '502test.mu.html#L2' > check-ints-equal< / a > result, < span class = "Constant" > 0< / span > , < span class = "Constant" > " F - < a href = 'mandelbrot-fixed.mu.html#L37' > test-fixed-conversion< / a > - 0" < / span >
< span id = "L42" class = "LineNr" > 42 < / span > < span class = "muComment" > # 1< / span >
< span id = "L43" class = "LineNr" > 43 < / span > < span class = "PreProc" > var< / span > f/< span class = "Constant" > eax< / span > : int < span class = "Special" > < -< / span > < a href = 'mandelbrot-fixed.mu.html#L20' > int-to-fixed< / a > < span class = "Constant" > 1< / span >
< span id = "L44" class = "LineNr" > 44 < / span > < span class = "PreProc" > var< / span > result/< span class = "Constant" > eax< / span > : int < span class = "Special" > < -< / span > < a href = 'mandelbrot-fixed.mu.html#L30' > fixed-to-int< / a > f
< span id = "L45" class = "LineNr" > 45 < / span > < a href = '502test.mu.html#L2' > check-ints-equal< / a > result, < span class = "Constant" > 1< / span > , < span class = "Constant" > " F - < a href = 'mandelbrot-fixed.mu.html#L37' > test-fixed-conversion< / a > - 1" < / span >
< span id = "L46" class = "LineNr" > 46 < / span > < span class = "muComment" > # -1< / span >
< span id = "L47" class = "LineNr" > 47 < / span > < span class = "PreProc" > var< / span > f/< span class = "Constant" > eax< / span > : int < span class = "Special" > < -< / span > < a href = 'mandelbrot-fixed.mu.html#L20' > int-to-fixed< / a > < span class = "Constant" > -1< / span >
< span id = "L48" class = "LineNr" > 48 < / span > < span class = "PreProc" > var< / span > result/< span class = "Constant" > eax< / span > : int < span class = "Special" > < -< / span > < a href = 'mandelbrot-fixed.mu.html#L30' > fixed-to-int< / a > f
< span id = "L49" class = "LineNr" > 49 < / span > < a href = '502test.mu.html#L2' > check-ints-equal< / a > result, < span class = "Constant" > -1< / span > , < span class = "Constant" > " F - < a href = 'mandelbrot-fixed.mu.html#L37' > test-fixed-conversion< / a > - -1" < / span >
< span id = "L50" class = "LineNr" > 50 < / span > < span class = "muComment" > # 0.5 = 1/2< / span >
< span id = "L51" class = "LineNr" > 51 < / span > < span class = "PreProc" > var< / span > f/< span class = "Constant" > eax< / span > : int < span class = "Special" > < -< / span > < a href = 'mandelbrot-fixed.mu.html#L20' > int-to-fixed< / a > < span class = "Constant" > 1< / span >
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< span id = "L52" class = "LineNr" > 52 < / span > f < span class = "Special" > < -< / span > shift-right-signed < span class = "Constant" > 1< / span >
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< span id = "L53" class = "LineNr" > 53 < / span > < span class = "PreProc" > var< / span > result/< span class = "Constant" > eax< / span > : int < span class = "Special" > < -< / span > < a href = 'mandelbrot-fixed.mu.html#L30' > fixed-to-int< / a > f
< span id = "L54" class = "LineNr" > 54 < / span > < a href = '502test.mu.html#L2' > check-ints-equal< / a > result, < span class = "Constant" > 0< / span > , < span class = "Constant" > " F - < a href = 'mandelbrot-fixed.mu.html#L37' > test-fixed-conversion< / a > - 0.5" < / span >
< span id = "L55" class = "LineNr" > 55 < / span > < span class = "muComment" > # -0.5 = -1/2< / span >
< span id = "L56" class = "LineNr" > 56 < / span > < span class = "PreProc" > var< / span > f/< span class = "Constant" > eax< / span > : int < span class = "Special" > < -< / span > < a href = 'mandelbrot-fixed.mu.html#L20' > int-to-fixed< / a > < span class = "Constant" > -1< / span >
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< span id = "L57" class = "LineNr" > 57 < / span > f < span class = "Special" > < -< / span > shift-right-signed < span class = "Constant" > 1< / span >
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< span id = "L58" class = "LineNr" > 58 < / span > < span class = "PreProc" > var< / span > result/< span class = "Constant" > eax< / span > : int < span class = "Special" > < -< / span > < a href = 'mandelbrot-fixed.mu.html#L30' > fixed-to-int< / a > f
< span id = "L59" class = "LineNr" > 59 < / span > < a href = '502test.mu.html#L2' > check-ints-equal< / a > result, < span class = "Constant" > -1< / span > , < span class = "Constant" > " F - < a href = 'mandelbrot-fixed.mu.html#L37' > test-fixed-conversion< / a > - -0.5" < / span >
< span id = "L60" class = "LineNr" > 60 < / span > < span class = "muComment" > # 1.5 = 3/2< / span >
< span id = "L61" class = "LineNr" > 61 < / span > < span class = "PreProc" > var< / span > f/< span class = "Constant" > eax< / span > : int < span class = "Special" > < -< / span > < a href = 'mandelbrot-fixed.mu.html#L20' > int-to-fixed< / a > < span class = "Constant" > 3< / span >
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< span id = "L62" class = "LineNr" > 62 < / span > f < span class = "Special" > < -< / span > shift-right-signed < span class = "Constant" > 1< / span >
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< span id = "L63" class = "LineNr" > 63 < / span > < span class = "PreProc" > var< / span > result/< span class = "Constant" > eax< / span > : int < span class = "Special" > < -< / span > < a href = 'mandelbrot-fixed.mu.html#L30' > fixed-to-int< / a > f
< span id = "L64" class = "LineNr" > 64 < / span > < a href = '502test.mu.html#L2' > check-ints-equal< / a > result, < span class = "Constant" > 1< / span > , < span class = "Constant" > " F - < a href = 'mandelbrot-fixed.mu.html#L37' > test-fixed-conversion< / a > - 1.5" < / span >
< span id = "L65" class = "LineNr" > 65 < / span > < span class = "muComment" > # -1.5 = -3/2< / span >
< span id = "L66" class = "LineNr" > 66 < / span > < span class = "PreProc" > var< / span > f/< span class = "Constant" > eax< / span > : int < span class = "Special" > < -< / span > < a href = 'mandelbrot-fixed.mu.html#L20' > int-to-fixed< / a > < span class = "Constant" > -3< / span >
< span id = "L67" class = "LineNr" > 67 < / span > f < span class = "Special" > < -< / span > shift-right-signed < span class = "Constant" > 1< / span >
< span id = "L68" class = "LineNr" > 68 < / span > < span class = "PreProc" > var< / span > result/< span class = "Constant" > eax< / span > : int < span class = "Special" > < -< / span > < a href = 'mandelbrot-fixed.mu.html#L30' > fixed-to-int< / a > f
< span id = "L69" class = "LineNr" > 69 < / span > < a href = '502test.mu.html#L2' > check-ints-equal< / a > result, < span class = "Constant" > -2< / span > , < span class = "Constant" > " F - < a href = 'mandelbrot-fixed.mu.html#L37' > test-fixed-conversion< / a > - -1.5" < / span >
< span id = "L70" class = "LineNr" > 70 < / span > < span class = "muComment" > # 1.25 = 5/4< / span >
< span id = "L71" class = "LineNr" > 71 < / span > < span class = "PreProc" > var< / span > f/< span class = "Constant" > eax< / span > : int < span class = "Special" > < -< / span > < a href = 'mandelbrot-fixed.mu.html#L20' > int-to-fixed< / a > < span class = "Constant" > 5< / span >
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< span id = "L72" class = "LineNr" > 72 < / span > f < span class = "Special" > < -< / span > shift-right-signed < span class = "Constant" > 2< / span >
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< span id = "L73" class = "LineNr" > 73 < / span > < span class = "PreProc" > var< / span > result/< span class = "Constant" > eax< / span > : int < span class = "Special" > < -< / span > < a href = 'mandelbrot-fixed.mu.html#L30' > fixed-to-int< / a > f
< span id = "L74" class = "LineNr" > 74 < / span > < a href = '502test.mu.html#L2' > check-ints-equal< / a > result, < span class = "Constant" > 1< / span > , < span class = "Constant" > " F - < a href = 'mandelbrot-fixed.mu.html#L37' > test-fixed-conversion< / a > - 1.25" < / span >
< span id = "L75" class = "LineNr" > 75 < / span > < span class = "muComment" > # -1.25 = -5/4< / span >
< span id = "L76" class = "LineNr" > 76 < / span > < span class = "PreProc" > var< / span > f/< span class = "Constant" > eax< / span > : int < span class = "Special" > < -< / span > < a href = 'mandelbrot-fixed.mu.html#L20' > int-to-fixed< / a > < span class = "Constant" > -5< / span >
< span id = "L77" class = "LineNr" > 77 < / span > f < span class = "Special" > < -< / span > shift-right-signed < span class = "Constant" > 2< / span >
< span id = "L78" class = "LineNr" > 78 < / span > < span class = "PreProc" > var< / span > result/< span class = "Constant" > eax< / span > : int < span class = "Special" > < -< / span > < a href = 'mandelbrot-fixed.mu.html#L30' > fixed-to-int< / a > f
< span id = "L79" class = "LineNr" > 79 < / span > < a href = '502test.mu.html#L2' > check-ints-equal< / a > result, < span class = "Constant" > -2< / span > , < span class = "Constant" > " F - < a href = 'mandelbrot-fixed.mu.html#L37' > test-fixed-conversion< / a > - -1.25" < / span >
< span id = "L80" class = "LineNr" > 80 < / span > < span class = "Delimiter" > }< / span >
< span id = "L81" class = "LineNr" > 81 < / span >
< span id = "L82" class = "LineNr" > 82 < / span > < span class = "muComment" > # special routines for multiplying and dividing fixed-point numbers< / span >
< span id = "L83" class = "LineNr" > 83 < / span >
< span id = "L84" class = "LineNr" > 84 < / span > < span class = "PreProc" > fn< / span > < span class = "muFunction" > < a href = 'mandelbrot-fixed.mu.html#L84' > multiply-fixed< / a > < / span > a: int, b: int< span class = "PreProc" > -> < / span > _/< span class = "Constant" > eax< / span > : int < span class = "Delimiter" > {< / span >
< span id = "L85" class = "LineNr" > 85 < / span > < span class = "PreProc" > var< / span > result/< span class = "Constant" > eax< / span > : int < span class = "Special" > < -< / span > copy a
< span id = "L86" class = "LineNr" > 86 < / span > result < span class = "Special" > < -< / span > multiply b
< span id = "L87" class = "LineNr" > 87 < / span > < span class = "Delimiter" > {< / span >
< span id = "L88" class = "LineNr" > 88 < / span > < span class = "PreProc" > break-if-not-overflow< / span >
< span id = "L89" class = "LineNr" > 89 < / span > < a href = '501draw-text.mu.html#L481' > abort< / a > < span class = "Constant" > " multiply-fixed: overflow" < / span >
< span id = "L90" class = "LineNr" > 90 < / span > < span class = "Delimiter" > }< / span >
< span id = "L91" class = "LineNr" > 91 < / span > result < span class = "Special" > < -< / span > shift-right-signed < span class = "Constant" > 8< / span > /fixed-precision
< span id = "L92" class = "LineNr" > 92 < / span > < span class = "PreProc" > return< / span > result
< span id = "L93" class = "LineNr" > 93 < / span > < span class = "Delimiter" > }< / span >
< span id = "L94" class = "LineNr" > 94 < / span >
< span id = "L95" class = "LineNr" > 95 < / span > < span class = "PreProc" > fn< / span > < span class = "muFunction" > < a href = 'mandelbrot-fixed.mu.html#L95' > divide-fixed< / a > < / span > a-f: int, b-f: int< span class = "PreProc" > -> < / span > _/< span class = "Constant" > eax< / span > : int < span class = "Delimiter" > {< / span >
< span id = "L96" class = "LineNr" > 96 < / span > < span class = "PreProc" > var< / span > result-f/< span class = "Constant" > eax< / span > : int < span class = "Special" > < -< / span > copy a-f
< span id = "L97" class = "LineNr" > 97 < / span > result-f < span class = "Special" > < -< / span > shift-left < span class = "Constant" > 8< / span > /fixed-precision
< span id = "L98" class = "LineNr" > 98 < / span > < span class = "Delimiter" > {< / span >
< span id = "L99" class = "LineNr" > 99 < / span > < span class = "PreProc" > break-if-not-overflow< / span >
< span id = "L100" class = "LineNr" > 100 < / span > < a href = '501draw-text.mu.html#L481' > abort< / a > < span class = "Constant" > " divide-fixed: overflow" < / span >
< span id = "L101" class = "LineNr" > 101 < / span > < span class = "Delimiter" > }< / span >
< span id = "L102" class = "LineNr" > 102 < / span > < span class = "PreProc" > var< / span > dummy-remainder/< span class = "Constant" > edx< / span > : int < span class = "Special" > < -< / span > copy < span class = "Constant" > 0< / span >
< span id = "L103" class = "LineNr" > 103 < / span > result-f, dummy-remainder < span class = "Special" > < -< / span > < a href = '314divide.subx.html#L3' > integer-divide< / a > result-f, b-f
< span id = "L104" class = "LineNr" > 104 < / span > < span class = "PreProc" > return< / span > result-f
< span id = "L105" class = "LineNr" > 105 < / span > < span class = "Delimiter" > }< / span >
< span id = "L106" class = "LineNr" > 106 < / span >
< span id = "L107" class = "LineNr" > 107 < / span > < span class = "muComment" > # multiplying or dividing by an integer can use existing instructions.< / span >
< span id = "L108" class = "LineNr" > 108 < / span >
< span id = "L109" class = "LineNr" > 109 < / span > < span class = "muComment" > # adding and subtracting two fixed-point numbers can use existing instructions.< / span >
< span id = "L110" class = "LineNr" > 110 < / span >
< span id = "L111" class = "LineNr" > 111 < / span > < span class = "PreProc" > fn< / span > < span class = "muFunction" > < a href = 'mandelbrot-fixed.mu.html#L111' > mandelbrot< / a > < / span > < a href = '500fake-screen.mu.html#L14' > screen< / a > : (addr < a href = '500fake-screen.mu.html#L14' > screen< / a > ) < span class = "Delimiter" > {< / span >
< span id = "L112" class = "LineNr" > 112 < / span > < span class = "PreProc" > var< / span > a/< span class = "Constant" > eax< / span > : int < span class = "Special" > < -< / span > copy < span class = "Constant" > 0< / span >
< span id = "L113" class = "LineNr" > 113 < / span > < span class = "PreProc" > var< / span > b/< span class = "Constant" > ecx< / span > : int < span class = "Special" > < -< / span > copy < span class = "Constant" > 0< / span >
< span id = "L114" class = "LineNr" > 114 < / span > a, b < span class = "Special" > < -< / span > < a href = '500fake-screen.mu.html#L70' > screen-size< / a > < a href = '500fake-screen.mu.html#L14' > screen< / a >
< span id = "L115" class = "LineNr" > 115 < / span > < span class = "PreProc" > var< / span > width-f/< span class = "Constant" > esi< / span > : int < span class = "Special" > < -< / span > copy a
< span id = "L116" class = "LineNr" > 116 < / span > width-f < span class = "Special" > < -< / span > shift-left < span class = "Constant" > 0xb< / span > /log2-font-width-and-fixed-precision < span class = "muComment" > # 3 + 8 = 11< / span >
< span id = "L117" class = "LineNr" > 117 < / span > < span class = "PreProc" > var< / span > height-f/< span class = "Constant" > edi< / span > : int < span class = "Special" > < -< / span > copy b
< span id = "L118" class = "LineNr" > 118 < / span > height-f < span class = "Special" > < -< / span > shift-left < span class = "Constant" > 0xc< / span > /log2-font-height-and-fixed-precision < span class = "muComment" > # 4 + 8 = 12< / span >
< span id = "L119" class = "LineNr" > 119 < / span > < span class = "PreProc" > var< / span > y/< span class = "Constant" > ecx< / span > : int < span class = "Special" > < -< / span > copy < span class = "Constant" > 0< / span >
< span id = "L120" class = "LineNr" > 120 < / span > < span class = "Delimiter" > {< / span >
< span id = "L121" class = "LineNr" > 121 < / span > compare y, height-f
< span id = "L122" class = "LineNr" > 122 < / span > < span class = "PreProc" > break-if-> =< / span >
< span id = "L123" class = "LineNr" > 123 < / span > < span class = "PreProc" > var< / span > imaginary-f/< span class = "Constant" > ebx< / span > : int < span class = "Special" > < -< / span > < a href = 'mandelbrot-fixed.mu.html#L216' > viewport-to-imaginary-f< / a > y, width-f, height-f
< span id = "L124" class = "LineNr" > 124 < / span > < span class = "PreProc" > var< / span > x/< span class = "Constant" > eax< / span > : int < span class = "Special" > < -< / span > copy < span class = "Constant" > 0< / span >
< span id = "L125" class = "LineNr" > 125 < / span > < span class = "Delimiter" > {< / span >
< span id = "L126" class = "LineNr" > 126 < / span > compare x, width-f
< span id = "L127" class = "LineNr" > 127 < / span > < span class = "PreProc" > break-if-> =< / span >
< span id = "L128" class = "LineNr" > 128 < / span > < span class = "PreProc" > var< / span > real-f/< span class = "Constant" > edx< / span > : int < span class = "Special" > < -< / span > < a href = 'mandelbrot-fixed.mu.html#L205' > viewport-to-real-f< / a > x, width-f
< span id = "L129" class = "LineNr" > 129 < / span > < span class = "PreProc" > var< / span > iterations/< span class = "Constant" > esi< / span > : int < span class = "Special" > < -< / span > < a href = 'mandelbrot-fixed.mu.html#L148' > mandelbrot-iterations-for-point< / a > real-f, imaginary-f, < span class = "Constant" > 0x400< / span > /max
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< span id = "L130" class = "LineNr" > 130 < / span > compare iterations, < span class = "Constant" > 0x400< / span > /max
< span id = "L131" class = "LineNr" > 131 < / span > < span class = "Delimiter" > {< / span >
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< span id = "L132" class = "LineNr" > 132 < / span > < span class = "PreProc" > break-if-> =< / span >
< span id = "L133" class = "LineNr" > 133 < / span > < a href = '500fake-screen.mu.html#L462' > pixel< / a > < a href = '500fake-screen.mu.html#L14' > screen< / a > , x, y, < span class = "Constant" > 0xf< / span > /white
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< span id = "L134" class = "LineNr" > 134 < / span > < span class = "Delimiter" > }< / span >
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< span id = "L135" class = "LineNr" > 135 < / span > compare iterations, < span class = "Constant" > 0x400< / span > /max
< span id = "L136" class = "LineNr" > 136 < / span > < span class = "Delimiter" > {< / span >
< span id = "L137" class = "LineNr" > 137 < / span > < span class = "PreProc" > break-if-< < / span >
< span id = "L138" class = "LineNr" > 138 < / span > < a href = '500fake-screen.mu.html#L462' > pixel< / a > < a href = '500fake-screen.mu.html#L14' > screen< / a > , x, y, < span class = "Constant" > 0< / span > /black
< span id = "L139" class = "LineNr" > 139 < / span > < span class = "Delimiter" > }< / span >
< span id = "L140" class = "LineNr" > 140 < / span > x < span class = "Special" > < -< / span > increment
< span id = "L141" class = "LineNr" > 141 < / span > < span class = "PreProc" > loop< / span >
< span id = "L142" class = "LineNr" > 142 < / span > < span class = "Delimiter" > }< / span >
< span id = "L143" class = "LineNr" > 143 < / span > y < span class = "Special" > < -< / span > increment
< span id = "L144" class = "LineNr" > 144 < / span > < span class = "PreProc" > loop< / span >
< span id = "L145" class = "LineNr" > 145 < / span > < span class = "Delimiter" > }< / span >
< span id = "L146" class = "LineNr" > 146 < / span > < span class = "Delimiter" > }< / span >
< span id = "L147" class = "LineNr" > 147 < / span >
< span id = "L148" class = "LineNr" > 148 < / span > < span class = "PreProc" > fn< / span > < span class = "muFunction" > < a href = 'mandelbrot-fixed.mu.html#L148' > mandelbrot-iterations-for-point< / a > < / span > real-f: int, imaginary-f: int, max: int< span class = "PreProc" > -> < / span > _/< span class = "Constant" > esi< / span > : int < span class = "Delimiter" > {< / span >
< span id = "L149" class = "LineNr" > 149 < / span > < span class = "PreProc" > var< / span > x-f/< span class = "Constant" > esi< / span > : int < span class = "Special" > < -< / span > copy < span class = "Constant" > 0< / span >
< span id = "L150" class = "LineNr" > 150 < / span > < span class = "PreProc" > var< / span > y-f/< span class = "Constant" > edi< / span > : int < span class = "Special" > < -< / span > copy < span class = "Constant" > 0< / span >
< span id = "L151" class = "LineNr" > 151 < / span > < span class = "PreProc" > var< / span > iterations/< span class = "Constant" > ecx< / span > : int < span class = "Special" > < -< / span > copy < span class = "Constant" > 0< / span >
< span id = "L152" class = "LineNr" > 152 < / span > < span class = "Delimiter" > {< / span >
< span id = "L153" class = "LineNr" > 153 < / span > < span class = "PreProc" > var< / span > done?/< span class = "Constant" > eax< / span > : boolean < span class = "Special" > < -< / span > < a href = 'mandelbrot-fixed.mu.html#L168' > mandelbrot-done?< / a > x-f, y-f
< span id = "L154" class = "LineNr" > 154 < / span > compare done?, < span class = "Constant" > 0< / span > /false
< span id = "L155" class = "LineNr" > 155 < / span > < span class = "PreProc" > break-if-!=< / span >
< span id = "L156" class = "LineNr" > 156 < / span > compare iterations, max
< span id = "L157" class = "LineNr" > 157 < / span > < span class = "PreProc" > break-if-> =< / span >
< span id = "L158" class = "LineNr" > 158 < / span > < span class = "PreProc" > var< / span > x2-f/< span class = "Constant" > edx< / span > : int < span class = "Special" > < -< / span > < a href = 'mandelbrot-fixed.mu.html#L182' > mandelbrot-x< / a > x-f, y-f, real-f
< span id = "L159" class = "LineNr" > 159 < / span > < span class = "PreProc" > var< / span > y2-f/< span class = "Constant" > ebx< / span > : int < span class = "Special" > < -< / span > < a href = 'mandelbrot-fixed.mu.html#L192' > mandelbrot-y< / a > x-f, y-f, imaginary-f
< span id = "L160" class = "LineNr" > 160 < / span > x-f < span class = "Special" > < -< / span > copy x2-f
< span id = "L161" class = "LineNr" > 161 < / span > y-f < span class = "Special" > < -< / span > copy y2-f
< span id = "L162" class = "LineNr" > 162 < / span > iterations < span class = "Special" > < -< / span > increment
< span id = "L163" class = "LineNr" > 163 < / span > < span class = "PreProc" > loop< / span >
< span id = "L164" class = "LineNr" > 164 < / span > < span class = "Delimiter" > }< / span >
< span id = "L165" class = "LineNr" > 165 < / span > < span class = "PreProc" > return< / span > iterations
< span id = "L166" class = "LineNr" > 166 < / span > < span class = "Delimiter" > }< / span >
< span id = "L167" class = "LineNr" > 167 < / span >
< span id = "L168" class = "LineNr" > 168 < / span > < span class = "PreProc" > fn< / span > < span class = "muFunction" > < a href = 'mandelbrot-fixed.mu.html#L168' > mandelbrot-done?< / a > < / span > x-f: int, y-f: int< span class = "PreProc" > -> < / span > _/< span class = "Constant" > eax< / span > : boolean < span class = "Delimiter" > {< / span >
< span id = "L169" class = "LineNr" > 169 < / span > < span class = "muComment" > # x*x + y*y > 4< / span >
< span id = "L170" class = "LineNr" > 170 < / span > < span class = "PreProc" > var< / span > tmp-f/< span class = "Constant" > eax< / span > : int < span class = "Special" > < -< / span > < a href = 'mandelbrot-fixed.mu.html#L84' > multiply-fixed< / a > x-f, x-f
< span id = "L171" class = "LineNr" > 171 < / span > < span class = "PreProc" > var< / span > result-f/< span class = "Constant" > ecx< / span > : int < span class = "Special" > < -< / span > copy tmp-f
< span id = "L172" class = "LineNr" > 172 < / span > tmp-f < span class = "Special" > < -< / span > < a href = 'mandelbrot-fixed.mu.html#L84' > multiply-fixed< / a > y-f, y-f
< span id = "L173" class = "LineNr" > 173 < / span > result-f < span class = "Special" > < -< / span > add tmp-f
< span id = "L174" class = "LineNr" > 174 < / span > compare result-f, < span class = "Constant" > 0x400< / span > /< span class = "Constant" > 4< / span >
< span id = "L175" class = "LineNr" > 175 < / span > < span class = "Delimiter" > {< / span >
< span id = "L176" class = "LineNr" > 176 < / span > < span class = "PreProc" > break-if-> < / span >
< span id = "L177" class = "LineNr" > 177 < / span > < span class = "PreProc" > return< / span > < span class = "Constant" > 0< / span > /false
< span id = "L178" class = "LineNr" > 178 < / span > < span class = "Delimiter" > }< / span >
< span id = "L179" class = "LineNr" > 179 < / span > < span class = "PreProc" > return< / span > < span class = "Constant" > 1< / span > /true
< span id = "L180" class = "LineNr" > 180 < / span > < span class = "Delimiter" > }< / span >
< span id = "L181" class = "LineNr" > 181 < / span >
< span id = "L182" class = "LineNr" > 182 < / span > < span class = "PreProc" > fn< / span > < span class = "muFunction" > < a href = 'mandelbrot-fixed.mu.html#L182' > mandelbrot-x< / a > < / span > x-f: int, y-f: int, real-f: int< span class = "PreProc" > -> < / span > _/< span class = "Constant" > edx< / span > : int < span class = "Delimiter" > {< / span >
< span id = "L183" class = "LineNr" > 183 < / span > < span class = "muComment" > # x*x - y*y + real< / span >
< span id = "L184" class = "LineNr" > 184 < / span > < span class = "PreProc" > var< / span > tmp-f/< span class = "Constant" > eax< / span > : int < span class = "Special" > < -< / span > < a href = 'mandelbrot-fixed.mu.html#L84' > multiply-fixed< / a > x-f, x-f
< span id = "L185" class = "LineNr" > 185 < / span > < span class = "PreProc" > var< / span > result-f/< span class = "Constant" > ecx< / span > : int < span class = "Special" > < -< / span > copy tmp-f
< span id = "L186" class = "LineNr" > 186 < / span > tmp-f < span class = "Special" > < -< / span > < a href = 'mandelbrot-fixed.mu.html#L84' > multiply-fixed< / a > y-f, y-f
< span id = "L187" class = "LineNr" > 187 < / span > result-f < span class = "Special" > < -< / span > subtract tmp-f
< span id = "L188" class = "LineNr" > 188 < / span > result-f < span class = "Special" > < -< / span > add real-f
< span id = "L189" class = "LineNr" > 189 < / span > < span class = "PreProc" > return< / span > result-f
< span id = "L190" class = "LineNr" > 190 < / span > < span class = "Delimiter" > }< / span >
< span id = "L191" class = "LineNr" > 191 < / span >
< span id = "L192" class = "LineNr" > 192 < / span > < span class = "PreProc" > fn< / span > < span class = "muFunction" > < a href = 'mandelbrot-fixed.mu.html#L192' > mandelbrot-y< / a > < / span > x-f: int, y-f: int, imaginary-f: int< span class = "PreProc" > -> < / span > _/< span class = "Constant" > ebx< / span > : int < span class = "Delimiter" > {< / span >
< span id = "L193" class = "LineNr" > 193 < / span > < span class = "muComment" > # 2*x*y + imaginary< / span >
< span id = "L194" class = "LineNr" > 194 < / span > < span class = "PreProc" > var< / span > result-f/< span class = "Constant" > eax< / span > : int < span class = "Special" > < -< / span > copy x-f
< span id = "L195" class = "LineNr" > 195 < / span > result-f < span class = "Special" > < -< / span > shift-left < span class = "Constant" > 1< / span > /log2
< span id = "L196" class = "LineNr" > 196 < / span > result-f < span class = "Special" > < -< / span > < a href = 'mandelbrot-fixed.mu.html#L84' > multiply-fixed< / a > result-f, y-f
< span id = "L197" class = "LineNr" > 197 < / span > result-f < span class = "Special" > < -< / span > add imaginary-f
< span id = "L198" class = "LineNr" > 198 < / span > < span class = "PreProc" > return< / span > result-f
< span id = "L199" class = "LineNr" > 199 < / span > < span class = "Delimiter" > }< / span >
< span id = "L200" class = "LineNr" > 200 < / span >
< span id = "L201" class = "LineNr" > 201 < / span > < span class = "muComment" > # Scale (x, y) pixel coordinates to a complex plane where the viewport width< / span >
< span id = "L202" class = "LineNr" > 202 < / span > < span class = "muComment" > # ranges from -2 to +2. Viewport height just follows the viewport's aspect< / span >
< span id = "L203" class = "LineNr" > 203 < / span > < span class = "muComment" > # ratio.< / span >
< span id = "L204" class = "LineNr" > 204 < / span >
< span id = "L205" class = "LineNr" > 205 < / span > < span class = "PreProc" > fn< / span > < span class = "muFunction" > < a href = 'mandelbrot-fixed.mu.html#L205' > viewport-to-real-f< / a > < / span > x: int, width-f: int< span class = "PreProc" > -> < / span > _/< span class = "Constant" > edx< / span > : int < span class = "Delimiter" > {< / span >
< span id = "L206" class = "LineNr" > 206 < / span > < span class = "muComment" > # (x - width/2)*4/width< / span >
< span id = "L207" class = "LineNr" > 207 < / span > < span class = "PreProc" > var< / span > result-f/< span class = "Constant" > eax< / span > : int < span class = "Special" > < -< / span > < a href = 'mandelbrot-fixed.mu.html#L20' > int-to-fixed< / a > x
< span id = "L208" class = "LineNr" > 208 < / span > < span class = "PreProc" > var< / span > half-width-f/< span class = "Constant" > ecx< / span > : int < span class = "Special" > < -< / span > copy width-f
< span id = "L209" class = "LineNr" > 209 < / span > half-width-f < span class = "Special" > < -< / span > shift-right-signed < span class = "Constant" > 1< / span > /log2
< span id = "L210" class = "LineNr" > 210 < / span > result-f < span class = "Special" > < -< / span > subtract half-width-f
< span id = "L211" class = "LineNr" > 211 < / span > result-f < span class = "Special" > < -< / span > shift-left < span class = "Constant" > 2< / span > /log4
< span id = "L212" class = "LineNr" > 212 < / span > result-f < span class = "Special" > < -< / span > < a href = 'mandelbrot-fixed.mu.html#L95' > divide-fixed< / a > result-f, width-f
< span id = "L213" class = "LineNr" > 213 < / span > < span class = "PreProc" > return< / span > result-f
< span id = "L214" class = "LineNr" > 214 < / span > < span class = "Delimiter" > }< / span >
< span id = "L215" class = "LineNr" > 215 < / span >
< span id = "L216" class = "LineNr" > 216 < / span > < span class = "PreProc" > fn< / span > < span class = "muFunction" > < a href = 'mandelbrot-fixed.mu.html#L216' > viewport-to-imaginary-f< / a > < / span > y: int, width-f: int, height-f: int< span class = "PreProc" > -> < / span > _/< span class = "Constant" > ebx< / span > : int < span class = "Delimiter" > {< / span >
< span id = "L217" class = "LineNr" > 217 < / span > < span class = "muComment" > # (y - height/2)*4/width< / span >
< span id = "L218" class = "LineNr" > 218 < / span > < span class = "PreProc" > var< / span > result-f/< span class = "Constant" > eax< / span > : int < span class = "Special" > < -< / span > < a href = 'mandelbrot-fixed.mu.html#L20' > int-to-fixed< / a > y
< span id = "L219" class = "LineNr" > 219 < / span > shift-right-signed height-f, < span class = "Constant" > 1< / span > /log2
< span id = "L220" class = "LineNr" > 220 < / span > result-f < span class = "Special" > < -< / span > subtract height-f
< span id = "L221" class = "LineNr" > 221 < / span > result-f < span class = "Special" > < -< / span > shift-left < span class = "Constant" > 2< / span > /log4
< span id = "L222" class = "LineNr" > 222 < / span > result-f < span class = "Special" > < -< / span > < a href = 'mandelbrot-fixed.mu.html#L95' > divide-fixed< / a > result-f, width-f
< span id = "L223" class = "LineNr" > 223 < / span > < span class = "PreProc" > return< / span > result-f
< span id = "L224" class = "LineNr" > 224 < / span > < span class = "Delimiter" > }< / span >
2021-05-09 06:53:28 +00:00
< / pre >
< / body >
< / html >
<!-- vim: set foldmethod=manual : -->