Uniformize all memory access methods

[guillep]

byteat:[put:] reads/writes an unsigned int 8.
shortat:[put:] reads/writes an unsigned int 16...

We should probably use a more explicit memory access methods:

int8At:
uint8at:
...

[Sneharaj7645653]

Hello @guillep,

I got to this issue through email.

Could you please give me a little more context on this, which can help me get started?

[guillep]

Sure!

In the VM there are lots of methods doing reads/writes to memory that look like:

byteat:[put:] reads/writes an unsigned int 8.
shortat:[put:] reads/writes an unsigned int 16...

Then, there are also methods called longAt:[put:] (with an old definition of long predating the era of 64bit machines) and long64At:[put:].

It would be nice to replace/rename those methods by more intention revealing methods that have the type and the size.

for example, byteAt: should be renamed as int8At: or uint8At:, depending if you wanted to read a signed or unsigned byte.

Short -> 16
Long -> 32
Long64 -> 64