sd:code_gremlins
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| Both sides previous revisionPrevious revisionNext revision | Previous revision | ||
| sd:code_gremlins [2026/04/01 03:24] – appledog | sd:code_gremlins [2026/04/01 04:17] (current) – appledog | ||
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| [^;]CMP [A-Za-z]+, | [^;]CMP [A-Za-z]+, | ||
| + | |||
| + | or maybe | ||
| + | |||
| + | ^\s+(LD|ADD|SUB|AND|OR|XOR|SHR|SHL|INC|DEC|MOV)\w*.*\n\s+CMP\s+[A-Za-z]+, | ||
| Surefire cases look like this: | Surefire cases look like this: | ||
| Line 91: | Line 95: | ||
| Here, the CMP is always redundant as LD sets Z. Other common ops that set Z; ST, AND, DIV, MOV, INC, DEC... | Here, the CMP is always redundant as LD sets Z. Other common ops that set Z; ST, AND, DIV, MOV, INC, DEC... | ||
| + | |||
| + | === Zero gremlins II: The Revenge | ||
| + | The Zero gremlin never really went away, he just changed masks. | ||
| + | |||
| + | ^\s+(LD|ST)\w+.*\n\s+(INC|DEC)\s+ | ||
| + | ^\s+(INC|DEC)\s+.*\n\s+(LD|ST)\w+ | ||
| + | |||
| + | The above will unmask these goblins right away! | ||
| == History | == History | ||
sd/code_gremlins.1775013884.txt.gz · Last modified: by appledog