[PATCH 1/8] ARM: assembler: introduce adr_l, ldr_l and str_l macros

[linux@armlinux.org.uk (Russell King - ARM Linux)]

On Thu, Aug 04, 2016 at 12:22:29PM +0100, Dave Martin wrote:
> The more conventional literal-.long approach could still be macro-ised
> along the same lines, which might make the affected code more readable,
> but the idiom you'd be replacing is well-understood and not very common.

I don't see how it could be.  You can't efficiently place the literal
data alongside the instructions dealing with it.

The only alternative is to use ldr rd, =foo, but that gets very stupid
when you want to calculate the relative offset, and you end up with
something like this for every relative load:

	ldr rd, =.
	sub rd, rd, #. - 4
	ldr r1, =foo
	add r1, r1, rd

As I've already said, I prefer the existing solution.  It works, it's
been known to work for the last 22 years.

If it isn't broken, don't try to fix it.

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