From: Ullrich von Bassewitz (uz_at_musoftware.de)
Date: 2001-10-12 00:29:30
On Thu, Oct 11, 2001 at 05:08:01PM -0500, Mike McCarty wrote:
> If one is simply trying to optimize for speed, regardless of space, the
> the best place to do this is in the linker, not the assembler.
It is even possible to move the complete branch distance optimization into the
linker - including the removeal of the additional three bytes when replacing a
long branch by a short one. This has a few drawbacks however:
* It makes the linker quite 6502 specific (currently the linker does not
care about the code).
* Any expression which is not an explicit constant must go as relocatable
expression into the object file. This means:
- Changes in the assembler.
- Many error messages get delayed until the linking phase.
- Some constructs that check code sizes are no longer possible in the
assembler.
Regards
Uz
--
Ullrich von Bassewitz uz_at_musoftware.de
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