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making markdown lint happier

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Perry Kivolowitz 2022-06-07 15:19:19 -05:00
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5
section_1/hello_world/README.md
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@ -65,7 +65,7 @@ There are other reasons to specify a `using namespace` and even some reasons *no
`Line 5` is a function declaration declaring `main`. In command line `Line 5` is a function declaration declaring `main`. In command line
programs (and indeed in many non-command line programs), a function programs (and indeed in many non-command line programs), a function
called `main` is necessary. called `main` is necessary.
In all respects save one, `main` is an In all respects save one, `main` is an
ordinary user-written function. What makes `main` special is its name ordinary user-written function. What makes `main` special is its name
@ -201,7 +201,7 @@ This marks the end of the `while` loop's *body*. The `}` causes a **jump**
back to evaluating what is pointed to by argv to see if it is now null (which back to evaluating what is pointed to by argv to see if it is now null (which
exits the loop). A synonym for **jump** is **branch** - remember this. exits the loop). A synonym for **jump** is **branch** - remember this.
Also remember that braces in a higher level language can mean a branch or jump in Also remember that braces in a higher level language can mean a branch or jump in
assembly language. A brace in a higher level language can also mean a *target* or landing place assembly language. A brace in a higher level language can also mean a *target* or landing place
for a jump / branch elsewhere in the code. for a jump / branch elsewhere in the code.
@ -463,7 +463,6 @@ That is, subtract 8 from the stack pointer and copy `x21` to that location. Then
**The stack pointer in ARM V8 can only be manipulated in multiples of 16.** **The stack pointer in ARM V8 can only be manipulated in multiples of 16.**
### Line 4 ### Line 4
When a function is passed parameters, up to 8 of them can be found in the first 8 scratch registers (`x0` through `x7`). For example, recall: When a function is passed parameters, up to 8 of them can be found in the first 8 scratch registers (`x0` through `x7`). For example, recall:

8
section_1/if/README.md
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@ -20,7 +20,6 @@ For simplicity, let us assume that both `a` and `b` are defined as
language. If `a` or `b` are not pointers and are not longs, `w` registers would sneak language. If `a` or `b` are not pointers and are not longs, `w` registers would sneak
in somewhere. See [Interlude - Registers](./section_1/regs/README.md) for more information. in somewhere. See [Interlude - Registers](./section_1/regs/README.md) for more information.
## `if` in `AARCH64` ## `if` in `AARCH64`
Here is the above `if` statement rendered into ARM V8 assembly language: Here is the above `if` statement rendered into ARM V8 assembly language:
@ -67,9 +66,10 @@ Handling of `>=` and `<=` follow from the above.
Using the state of the condition bits (which are set by the faux subtraction of `x1` Using the state of the condition bits (which are set by the faux subtraction of `x1`
from `x0` performed by `cmp`), branch (a jump or goto) if the previous computation shows from `x0` performed by `cmp`), branch (a jump or goto) if the previous computation shows
`less than or equal to` zero. Notice `less than or equal to` zero. Notice
the use of the *opposite* condition as found in the `C` code. This use of the opposite condition is not a hard and fast rule. In this case, it allows the body of the `if` the use of the *opposite* condition as found in the `C` code.
This use of the opposite condition is not a hard and fast rule. In this case, it allows the body of the `if`
statement to be written directly below the branch so as to emulate the skipping of statement to be written directly below the branch so as to emulate the skipping of
the code block contained between the `if` statement's braces. the code block contained between the `if` statement's braces.
This is a matter of This is a matter of
style. style.
@ -211,7 +211,7 @@ allow a branch to that code block, such as the beginning of an `else`.
as the equivalent `if` statement in a high level language. as the equivalent `if` statement in a high level language.
Answer: False - it is a matter of style but you may be able to Answer: False - it is a matter of style but you may be able to
save an instruction or two by doing so. save an instruction or two by doing so.
### 2 ### 2