On 26/7/21 7:00 am, Linus Torvalds wrote:
On Sun, Jul 25, 2021 at 1:48 PM Michael Schmitz <schmitzmic@xxxxxxxxx> wrote:
Just out of interest - what would be the correct way to set/clear a
single bit on Coldfire? Add/subtract the 1<<bit value?
I think BSET/BCLR are the way to go.
Yep, they are available on all ColdFire revisions.
I think they are the best choice here.
Or, alternatively, put the constant in a register, and use a longword
memory access. The arithmetic ops don't do immediates _and_ memory
operands in Coldfire, and they don't do byte ops.
Or something like that.
Yes, that is right with one exception. You can use addq with immediates
of value 1 to 8 with memory operands.
Regards
Greg
