Re: Simple ARM code generation

[Richard Earnshaw <Richard dot Earnshaw at buzzard dot freeserve dot co dot uk>]

> To make things a bit easier when talking about stacks you can also talk 
> about the stack layout in the instructions, you can then write your ldm 
> and stm instructions using the stack mnemonics, the most common of which 
> is a 'full-descending' stack (the stack grows by moving to a lower address 
> and the bottom, addresed, word contains data -- it's full).  So
> 
> 	stmdb sp!, {r4, r5, r6}
> 	ldmdb sp!, {r4, r5, r6}
> 
> will push r4-r6 onto the stack and then pop them off again.

Bah! I've just noticed a critical typo in the above.  The stack variants 
of the instructions are

	stmFD sp!, {r4, r5, r6}
	ldmFD sp!, {r4, r5, r6}

FD describes the stack here (F-ull D-escending).

Sorry about that, hope you weren't too confused.

R.