| 73 | | === D2.x === |
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| 74 | | |
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| 75 | | {{{ |
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| 76 | | #!d |
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| 77 | | /* |
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| 78 | | * Copyright (C) 2004 by Digital Mars, www.digitalmars.com |
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| 79 | | * Written by Lynn Allan |
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| 80 | | * This software is provided 'as-is' by a rusty asm-486 programmer. |
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| 81 | | * Released to public domain. |
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| 82 | | * |
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| 83 | | * Compile with: dmd test.d (uses dmd ver 2.046) |
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| 84 | | */ |
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| 85 | | |
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| 86 | | import std.stdio; |
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| 87 | | import std.string; |
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| 88 | | |
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| 89 | | void main () |
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| 90 | | { |
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| 91 | | string searchString = "The quick brown fox jumped over the lazy dog."; |
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| 92 | | // 00000000001111111111222222222233333333334444 |
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| 93 | | // 01234567890123456789012345678901234567890123 |
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| 94 | | immutable(char)* pss = &searchString[0]; // searchString[0]; |
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| 95 | | uint foundOffset = indexOf(searchString, 'z'); |
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| 96 | | uint zCode = 'z'; |
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| 97 | | uint len = searchString.length; |
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| 98 | | writefln("z found at: %s", foundOffset); |
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| 99 | | uint xCode = 'x'; |
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| 100 | | foundOffset = indexOf(searchString, 'x'); |
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| 101 | | len = searchString.length; |
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| 102 | | writefln("x found at: %s", foundOffset); |
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| 103 | | |
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| 104 | | asm { |
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| 105 | | cld; |
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| 106 | | mov ECX,len; |
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| 107 | | mov EAX,zCode; |
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| 108 | | mov EDI,pss; |
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| 109 | | repne; |
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| 110 | | scasb; |
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| 111 | | mov EBX,len; |
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| 112 | | sub EBX,ECX; |
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| 113 | | dec EBX; |
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| 114 | | mov foundOffset,EBX; |
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| 115 | | } |
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| 116 | | writefln("z found at: %s", foundOffset); |
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| 117 | | assert(foundOffset==38); |
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| 118 | | |
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| 119 | | asm { |
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| 120 | | cld; |
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| 121 | | mov ECX,len; |
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| 122 | | mov EAX,xCode; |
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| 123 | | mov EDI,pss; |
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| 124 | | repne; |
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| 125 | | scasb; |
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| 126 | | mov EBX,len; |
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| 127 | | sub EBX,ECX; |
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| 128 | | dec EBX; |
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| 129 | | mov foundOffset,EBX; |
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| 130 | | } |
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| 131 | | writefln("x found at: %s", foundOffset); |
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| 132 | | assert(foundOffset==18); |
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| 133 | | } |
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| 134 | | }}} |
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