BSD 4_3_Net_2 release

[unix-history] / usr / src / lib / libc / vax / string / bcopy.s

diff --git a/usr/src/lib/libc/vax/string/bcopy.s b/usr/src/lib/libc/vax/string/bcopy.s
index dea0e1b..43bb93d 100644 (file)
--- a/usr/src/lib/libc/vax/string/bcopy.s
+++ b/usr/src/lib/libc/vax/string/bcopy.s
@@ -1,18 +1,78 @@
-/* @(#)bcopy.s 4.3 %G% */
+/*
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *     This product includes software developed by the University of
+ *     California, Berkeley and its contributors.
+ * 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"
 
 /* bcopy(from, to, size) */
 
 #include "DEFS.h"
 

-ENTRY(bcopy)
+ENTRY(bcopy, R6)

        movl    4(ap),r1
        movl    8(ap),r3
        movl    4(ap),r1
        movl    8(ap),r3

-       jbr     2f
+       movl    12(ap),r6
+       cmpl    r1,r3
+       bgtr    2f              # normal forward case
+       blss    3f              # overlapping, must do backwards
+       ret                     # equal, nothing to do

 1:
 1:

-       subl2   r0,12(ap)
+       subl2   r0,r6

        movc3   r0,(r1),(r3)
 2:
        movzwl  $65535,r0
        movc3   r0,(r1),(r3)
 2:
        movzwl  $65535,r0

-       cmpl    12(ap),r0
+       cmpl    r6,r0

        jgtr    1b
        jgtr    1b

-       movc3   12(ap),(r1),(r3)
+       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
        ret