#include "DEFS.h"
ENTRY(swab)
movl sp@(4),a0 | source
movl sp@(8),a1 | destination
movl sp@(12),d0 | count
lsrl #1,d0 | count is in bytes; we need words
beq swdone
swloop:
movw a0@+,d1
rorw #8,d1
movw d1,a1@+
subql #1,d0
bne swloop
swdone:
rts