i += 4 == INCR i BY 4

[Colin Schmidt]

Vladimir Shulakov: Thanks! "! add i, 4" is exactly what I was looking for.

Scott Turchin: I'm assumming the reason they don't have inc i, 4 is because of the above. Although if it is as simple to add to the compiler as I think it might be, then I'd say YES!

Thanks,

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Colin Schmidt & James Duffy, Praxis Enterprises, Canada


[This message has been edited by Colin Schmidt (edited January 21, 2000).]

[Scott Turchin]

In PB Dos 3.x you could specify:

Incr i,4

Love to see that added to the PB/DLL and PB/CC...

Scott

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Scott Turchin

[Vladimir Shulakov]

Hi
For LONG and DWORD!
'dim i as long

! add i,4

or

! mov eax,i
! add eax,4
...
or
! inc i
! inc i
! inc i
! inc i
-------------------------------
V.Shualkov

[Colin Schmidt]

Hello,

Can anyone suggest a way to add a value to a variable that is as efficient as the C++ statement of i += 4?

I know there is the INCR statement that will add a value of one to the variable, but it does not allow for any other values.

The reason for this is:

i = i + 4 in C++ takes the value of the memory at i and copies it to the accumulator, then adds the 4 to it, then copies the new value back to the memory at i.

In i += 4, the code simply adds 4 to the memory location at the location i. Thus there is no double copying of the values.

I guess what I’m looking for or would like is the command INCR I BY 4

Thanks,

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Colin Schmidt & James Duffy, Praxis Enterprises, Canada