Hi.  I've got a quick question about sys/arch/m68k/m68k/copypage.s.
This is the copypage function in -current:

ENTRY(copypage)
        movl        %sp@(4),%a0           | source address
        movl        %sp@(8),%a1           | destiniation address
        movw        #NBPG/32-1,%d0        | number of 32 byte chunks - 1
Lmlloop:
        movl        %a0@+,%a1@+
        movl        %a0@+,%a1@+
        movl        %a0@+,%a1@+
        movl        %a0@+,%a1@+
        movl        %a0@+,%a1@+
        movl        %a0@+,%a1@+
        movl        %a0@+,%a1@+
        movl        %a0@+,%a1@+
        dbf        %d0,Lmlloop
        rts

Is that movw to load the loop count into %d0 correct?  I'm new to
680x0 assembly, but doesn't this leave garbage in the high word
of %d0, when the dbf is going to decrement all of %d0 to -1?

(Please cc: me on replies, as I'm not on port-m68k)

Thanks,

Matt

--
Matt Fredette
fredette@aquery.com, fredette@mit.edu, fredette@theory.lcs.mit.edu
http://mit.edu/fredette/www
"If you understood everything I said, you'd be me."  - Miles Davis