1/* $NetBSD: swab.S,v 1.7 1999/10/25 23:48:16 thorpej Exp $ */ 2 3#include <machine/asm.h> 4 5ENTRY(swab) 6 movl %sp@(4),%a0 | source 7 movl %sp@(8),%a1 | destination 8 movl %sp@(12),%d0 | count 9 lsrl #1,%d0 | count is in bytes; we need words 10 jeq swdone 11 12swloop: 13 movw %a0@+,%d1 14 rorw #8,%d1 15 movw %d1,%a1@+ 16 subql #1,%d0 17 jne swloop 18 19swdone: 20 rts 21