X86-64 Instruction Encoding: Difference between revisions
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== Legacy Prefixes == |
== Legacy Prefixes == |
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Each instruction can have up to four prefixes. Sometimes a prefix is required for the instruction while it loses |
Each instruction can have up to four prefixes. Sometimes a prefix is required for the instruction while it loses its original meaning (i.e. a 'mandatory prefix'). The following prefixes can be used, the order does not matter: |
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* Prefix group 1 |
* Prefix group 1 |
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** 0xF0: LOCK prefix |
** 0xF0: LOCK prefix |
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