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Update Readme.md for Part 15. #78

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Update Readme.md for Part 15. #78

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19 changes: 19 additions & 0 deletions 15_Pointers_pt1/Readme.md
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Original file line number Diff line number Diff line change
Expand Up @@ -316,6 +316,25 @@ The `leaq` instruction loads the address of the named identifier.
In the section function, the `(%r8)` syntax loads the value that
register `%r8` points to.

### Corresponding changes to cgstorglob and cgloadglob

cgloadglob :
```c
case P_LONG:
case P_CHARPTR:
case P_INTPTR:
case P_LONGPTR:
fprintf(Outfile, "\tmovq\t%s(\%%rip), %s\n", Gsym[id].name, reglist[r]);
```
cgstorglob :
```c
case P_LONG:
case P_CHARPTR:
case P_INTPTR:
case P_LONGPTR:
fprintf(Outfile, "\tmovq\t%s, %s(\%%rip)\n", reglist[r], Gsym[id].name);
```

## Testing the New Functinality

Here's our new test file, `tests/input15.c` and the result when we
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