21 lines
326 B
ArmAsm
21 lines
326 B
ArmAsm
/* $NetBSD: swab.S,v 1.4 1995/11/17 20:21:28 thorpej Exp $ */
|
|
|
|
#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
|