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explanation of line 7 thank you to 0x3333 for the pull request

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Perry Kivolowitz 2022-12-26 08:33:44 -06:00
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section_1/hello_world/README.md
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@ -623,6 +623,10 @@ This difference is OK because the older value of `argv` is preserved in
`argv` before the increment, it doesn't matter when the increment is
done.
Why is that value of 8 on line 7? Recall that all addresses in this
64 bit ISA are... 8 bytes long. To move our gaze from one pointer to
the next within an array of pointers, we must increment by 8.
The *if* happens on the first line of the C++ but done on the middle
line of the assembly language. `cbz` stands for *`C`onditionally
`B`ranch if `Z`ero*.