mov - Can I use movl instead of movb or movw in Assembly on modern systems? - Stack Overflow
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I am learning how to program in Assembly and I have a clarification question.
In my book, it makes quite the deal out of the importance of using the correct suffix in conjunction with the command.
However, in class the teacher has only used the 'movl' operand.
Is my teacher doing this for simplicity or have the 'movb' and 'movw' commands become obsolete in recent years?
Is efficiency lost when using movl as opposed to movb on a char type for example?
Will it even work?
update: I am talking about x86-64 assembly
It's quite comparable of using integers vs. characters in higher level languages. They are not obsolete, but in small examples it doesn't matter if small numbers are stored as 32-bit words or bytes. However, if you manipulate strings, I very highly recommend using bytes. (Or you might accidentally overwrite some neighbouring characters.)
What kind of architecture is this question relating to?On modern x86, for example, loading with mov[b/w] kills performance due to partial register updates (prevents register renaming/extends the dependency chain). Use movzx/movsx to zero/sign-extend into the full-sized register to prevent this.
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Stack Overflow works best with JavaScript enabled大功率充电器6oV6oAH电动三轮车_百度知道
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我有更好的答案
可配用60V20A充电器充电，充入电流调节为6A充入电池。
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<img src="static/imag电动车充电器6ov2oah一般要多少钱一个_百度知道
电动车充电器6ov2oah一般要多少钱一个
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进货价25-35之间。质量不好的20这样。出售价在40--60不等。专用的更黑。
采纳率：66%
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我们会通过消息、邮箱等方式尽快将举报结果通知您。6ov6oah的电池组与6ov20ah的两组电池比较,那一种爬坡力度更强?速行里程更远？_百度知道
6ov6oah的电池组与6ov20ah的两组电池比较,那一种爬坡力度更强?速行里程更远？
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按你说的6oV6oAH的应该有后劲，当然行使的里程多
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