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by nayuki
1161 days ago
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> assemler mnemonic representations of opcodes are not hiding anything They do hide things. There are often multiple ways to encode a line of assembly into machine code. For example on x86, JMP can take an 8-, 16-, or 32-bit displacement, and the assembler will usually select the shortest encodable variant. Some instructions have a shorter variant for certain registers, like ADD $1, %eax. You add useless REX prefixes. |
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