The use of DWORD's

Started by drago, Aug 20 1999 08:33 PM

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#1 drago Members - Reputation: 150

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Posted 20 August 1999 - 08:33 PM

Is it more efficient to use DWORD's instead of int/long/etc. on 32-bit CPU's? Even if it used for coordinates, e.q. would one use DWORD x, DWORD y or INT x, INT y?

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Drago

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#2 Anonymous Poster_Anonymous Poster_* Guests - Reputation:

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Posted 20 August 1999 - 12:20 AM

in 32 bit mode unsigned long = unsigned int = dword. (you may also have without unsigned but that depends on the compilators defaults...)

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#3 White Fire Members - Reputation: 122

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Posted 20 August 1999 - 08:33 PM

sizeof(int) is rarely defined in books, since it differs between systems. It really differs between compilers, but a good compiler will define an int to be the same size as a single cpu word. That is, on a 32 bit machine, an int will take 32 bits == 4 bytes.

<rant>
This is of course assuming that compilers keep up with the systems they're built for. Pentiums have a 64 bit cpu, if only their operating system(s) would actually support it.
</rant>

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