8 Jun
2017
8 Jun
'17
1:15 a.m.
On 6/7/2017 3:03 PM, Ron Natalie wrote:
In the days when memory and clock cycles were costly, an extra decrement
or subtract was not something to be taken lightly :)
On the other hand, I can see that you could solve this in the
preprocessor. In my example, just make it:
MOV AL, [SI + (ARRAY1 - FIRSTELEMENT)]
And let the assembler deal with it.
Still, there's something oddly "artificial" about that, again from the
machine language point of view. There's nothing "idiotic" about it IMHO.
It's just the way processors actually work.
Of course, if you're really into abstraction, well, to each his own :)
ak
Why go to the
trouble of decrementing the index to retreive the first entry?
What makes you think
that you have to decrement the index. Don't get sucked up in the idiotic C
implementation of an array. Arrays can be efficiently implemented no matter where the
index starts.