/*      $NetBSD: swab.S,v 1.11 2014/03/18 18:20:37 riastradh Exp $      */

#include <machine/asm.h>

ENTRY(swab)
        movl    4(%sp),%a0              | source
        movl    8(%sp),%a1              | destination
        movl    12(%sp),%d0             | count
        lsrl    #1,%d0                  | count is in bytes; we need words
        jeq     swdone

swloop:
#ifdef __mcoldfire__
        movb    (%a0)+,1(%a1)
        movb    (%a0)+,(%a1)
        addql   #2,%a1
#else
        movw    (%a0)+,%d1
        rorw    #8,%d1
        movw    %d1,(%a1)+
#endif
        subql   #1,%d0
        jne     swloop

swdone:
        rts
END(swab)