September 2017
Beginner to intermediate
290 pages
6h 58m
English
Content preview from Mastering Assembly Programming
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Bit and byte instructions
Instructions of this group are those that let us manipulate individual bits within an operand and/or set bytes in accordance with the sate of flags in the EFlags/RFlags register.
With high-level languages that implement bit fields, it is quite easy to access individual bits even if we want to perform more complex operations than just scan, test, set or reset, as provided by Intel Assembly. However, with high-level languages having no bit fields we have to implement certain constructs in order to have access to individual bits and that is where Assembly is more convenient.
While bit and byte instructions may have a variety of applications, let's consider them (just a few of them) in the context of the CRC8 example. ...
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