| /* |
| * Copyright (c) 1983 Regents of the University of California. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 4. Neither the name of the University nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |
| |
| #if defined(LIBC_SCCS) && !defined(lint) |
| .asciz "@(#)bcopy.s 5.6 (Berkeley) 6/1/90" |
| #endif /* LIBC_SCCS and not lint */ |
| |
| /* bcopy(from, to, size) */ |
| |
| #include "DEFS.h" |
| |
| ENTRY(bcopy, R6) |
| movl 4(ap),r1 |
| movl 8(ap),r3 |
| movl 12(ap),r6 |
| cmpl r1,r3 |
| bgtr 2f # normal forward case |
| blss 3f # overlapping, must do backwards |
| ret # equal, nothing to do |
| 1: |
| subl2 r0,r6 |
| movc3 r0,(r1),(r3) |
| 2: |
| movzwl $65535,r0 |
| cmpl r6,r0 |
| jgtr 1b |
| movc3 r6,(r1),(r3) |
| ret |
| 3: |
| addl2 r6,r1 |
| addl2 r6,r3 |
| movzwl $65535,r0 |
| jbr 5f |
| 4: |
| subl2 r0,r6 |
| subl2 r0,r1 |
| subl2 r0,r3 |
| movc3 r0,(r1),(r3) |
| movzwl $65535,r0 |
| subl2 r0,r1 |
| subl2 r0,r3 |
| 5: |
| cmpl r6,r0 |
| jgtr 4b |
| subl2 r6,r1 |
| subl2 r6,r3 |
| movc3 r6,(r1),(r3) |
| ret |
