diff options
Diffstat (limited to 'sys/lib/libkern/arch/m68k/memmove.S')
| -rw-r--r-- | sys/lib/libkern/arch/m68k/memmove.S | 132 |
1 files changed, 0 insertions, 132 deletions
diff --git a/sys/lib/libkern/arch/m68k/memmove.S b/sys/lib/libkern/arch/m68k/memmove.S deleted file mode 100644 index a6992690957..00000000000 --- a/sys/lib/libkern/arch/m68k/memmove.S +++ /dev/null @@ -1,132 +0,0 @@ -/* $OpenBSD: memmove.S,v 1.4 2013/06/17 17:50:07 jj Exp $ */ -/* $NetBSD: bcopy.s,v 1.1 1997/03/17 19:44:33 gwr Exp $ */ - -/*- - * Copyright (c) 1990 The Regents of the University of California. - * All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * the Systems Programming Group of the University of Utah Computer - * Science Department. - * - * 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. - * 3. 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. - */ - -/* - * This is based on: src/lib/libc/arch/m68k/string/bcopy.S - * identified as: @(#)bcopy.s 5.1 (Berkeley) 5/12/90 - */ - -#include <machine/asm.h> - - .file "memmove.S" - .text - -/* - * bcopy(from, to, len) - * memmove(to, from, len): swap args and fall into bcopy - * memcpy(to, from, len): swap args, and fall into forward bcopy - * - */ -ENTRY(memcpy) - movl %sp@(12),%d0 | get count - jeq Lbccpyexit | if zero, return - movl %sp@(8), %a0 | src address - movl %sp@(4), %a1 | dest address - jra Lbcdocopyf | copy forward -ENTRY(memmove) - movl %sp@(12),%d0 | get count - jeq Lbccpyexit | if zero, return - movl %sp@(8), %a0 | src address - movl %sp@(4), %a1 | dest address - jra Lbcdocopy | jump into bcopy -ENTRY(bcopy) - movl %sp@(12),%d0 | get count - jeq Lbccpyexit | if zero, return - movl %sp@(4),%a0 | src address - movl %sp@(8),%a1 | dest address -Lbcdocopy: - cmpl %a1,%a0 | src before dest? - jlt Lbccpyback | yes, copy backwards (avoids overlap) -Lbcdocopyf: - movl %a0,%d1 - btst #0,%d1 | src address odd? - jeq Lbccfeven | no, go check dest - movb %a0@+,%a1@+ | yes, copy a byte - subql #1,%d0 | update count - jeq Lbccpyexit | exit if done -Lbccfeven: - movl %a1,%d1 - btst #0,%d1 | dest address odd? - jne Lbccfbyte | yes, must copy by bytes - movl %d0,%d1 | no, get count - lsrl #2,%d1 | convert to longwords - jeq Lbccfbyte | no longwords, copy bytes -Lbccflloop: - movl %a0@+,%a1@+ | copy longwords - subql #1,%d1 | decrement counter - jne Lbccflloop | til done - andl #3,%d0 | get remaining count - jeq Lbccpyexit | done if none -Lbccfbyte: -Lbccfbloop: - movb %a0@+,%a1@+ | copy bytes - subql #1,%d0 | decrement counter - jne Lbccfbloop | til done -Lbccpyexit: - movl %sp@(4),%d0 | dest address - moveal %d0,%a0 - rts -Lbccpyback: - addl %d0,%a0 | add count to src - addl %d0,%a1 | add count to dest - movl %a0,%d1 - btst #0,%d1 | src address odd? - jeq Lbccbeven | no, go check dest - movb %a0@-,%a1@- | yes, copy a byte - subql #1,%d0 | update count - jeq Lbccpyexit | exit if done -Lbccbeven: - movl %a1,%d1 - btst #0,%d1 | dest address odd? - jne Lbccbbyte | yes, must copy by bytes - movl %d0,%d1 | no, get count - lsrl #2,%d1 | convert to longwords - jeq Lbccbbyte | no longwords, copy bytes -Lbccblloop: - movl %a0@-,%a1@- | copy longwords - subql #1,%d1 | decrement counter - jne Lbccblloop | til done - andl #3,%d0 | get remaining count - jeq Lbccpyexit | done if none -Lbccbbyte: -Lbccbbloop: - movb %a0@-,%a1@- | copy bytes - subql #1,%d0 | decrement counter - jne Lbccbbloop | til done - movl %sp@(4),%d0 | dest address - moveal %d0,%a0 - rts - |