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Mail Archives: djgpp/1994/10/07/22:42:29

Date: Fri, 7 Oct 1994 18:22:36 -0700 (PDT)
From: "Frederick W. Reimer" <fwreimer AT crl DOT com>
Subject: Re: 16 vs. 32
To: "Grzegorz B. Mazur" <gbm AT ii DOT pw DOT edu DOT pl>
Cc: djgpp AT sun DOT soe DOT clarkson DOT edu

On Thu, 6 Oct 1994, Grzegorz B. Mazur wrote:

> On REAL 32 bit chips, like 386, 486 and above, and MC68020 and above
> 32-bit maath is at least as fast as 16-bit, assuming that the operands are
> in registers or are properly aligned in memory (and memorybus is at least
> 32-bit wide). The above is not the case for MC68000, 68010 (16-bit memory bus
> and 16 bit INTERNAL BUS!!!), and for 386SX memory references.
> So  there is no reason for not using 32 bit ints for 386+. All the real
> compilers do it (incl. GCC).

Right on!  At last someone who understands the need for DJGPP, and why we 
like it so much!

Fred Reimer

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