[src/trunk]: src/lib/libc/arch/m68k/string On the 68010, we are forced to do ...

[fredette <fredette%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/e05007a338de
branches:  trunk
changeset: 510043:e05007a338de
user:      fredette <fredette%NetBSD.org@localhost>
date:      Thu May 17 21:24:08 2001 +0000

description:
On the 68010, we are forced to do bytewise compares
and copies if the two addresses aren't of the same
evenness.

diffstat:

 lib/libc/arch/m68k/string/bcmp.S  |  16 ++++++++++++++--
 lib/libc/arch/m68k/string/bcopy.S |  28 ++++++++++++++++++++++++++--
 2 files changed, 40 insertions(+), 4 deletions(-)

diffs (93 lines):

diff -r 9d283b85789e -r e05007a338de lib/libc/arch/m68k/string/bcmp.S
--- a/lib/libc/arch/m68k/string/bcmp.S  Thu May 17 21:21:07 2001 +0000
+++ b/lib/libc/arch/m68k/string/bcmp.S  Thu May 17 21:24:08 2001 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: bcmp.S,v 1.11 1999/10/25 23:48:14 thorpej Exp $        */
+/*     $NetBSD: bcmp.S,v 1.12 2001/05/17 21:24:08 fredette Exp $       */
 
 /*-
  * Copyright (c) 1997 The NetBSD Foundation, Inc.
@@ -79,7 +79,7 @@
 #if 0
        RCSID("from: @(#)bcmp.s 5.1 (Berkeley) 5/12/90")
 #else
-       RCSID("$NetBSD: bcmp.S,v 1.11 1999/10/25 23:48:14 thorpej Exp $")
+       RCSID("$NetBSD: bcmp.S,v 1.12 2001/05/17 21:24:08 fredette Exp $")
 #endif
 #endif /* LIBC_SCCS and not lint */
 
@@ -95,6 +95,18 @@
        cmpl    #8,%d1
        jlt     Lbcbyte                 
 
+#ifdef __mc68010__
+       /*
+        * The 68010 cannot access a word or long on an odd boundary,
+        * period.  If the source and the destination addresses aren't
+        * of the same evenness, we're forced to do a bytewise compare.
+        */
+       movl    %a0,%d0
+       addl    %a1,%d0
+       btst    #0,%d0
+       jne     Lbcbyte
+#endif /* __mc68010__ */
+       
        /* word align */
        movl    %a0,%d0
        btst    #0,%d0
diff -r 9d283b85789e -r e05007a338de lib/libc/arch/m68k/string/bcopy.S
--- a/lib/libc/arch/m68k/string/bcopy.S Thu May 17 21:21:07 2001 +0000
+++ b/lib/libc/arch/m68k/string/bcopy.S Thu May 17 21:24:08 2001 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: bcopy.S,v 1.15 1999/10/25 23:48:14 thorpej Exp $       */
+/*     $NetBSD: bcopy.S,v 1.16 2001/05/17 21:24:08 fredette Exp $      */
 
 /*-
  * Copyright (c) 1997 The NetBSD Foundation, Inc.
@@ -79,7 +79,7 @@
 #if 0
        RCSID("from: @(#)bcopy.s        5.1 (Berkeley) 5/12/90")
 #else
-       RCSID("$NetBSD: bcopy.S,v 1.15 1999/10/25 23:48:14 thorpej Exp $")
+       RCSID("$NetBSD: bcopy.S,v 1.16 2001/05/17 21:24:08 fredette Exp $")
 #endif
 #endif /* LIBC_SCCS and not lint */
 
@@ -112,6 +112,18 @@
        cmpl    #8,%d1
        jlt     Lbcfbyte
 
+#ifdef __mc68010__
+       /*
+        * The 68010 cannot access a word or long on an odd boundary,
+        * period.  If the source and the destination addresses aren't
+        * of the same evenness, we're forced to do a bytewise copy.
+        */
+       movl    %a0,%d0
+       addl    %a1,%d0
+       btst    #0,%d0
+       jne     Lbcfbyte
+#endif /* __mc68010__ */
+       
        /* word align */
        movl    %a1,%d0
        btst    #0,%d0          | if (dst & 1)
@@ -183,6 +195,18 @@
        cmpl    #8,%d1
        jlt     Lbcbbyte
 
+#ifdef __mc68010__
+       /*
+        * The 68010 cannot access a word or long on an odd boundary,
+        * period.  If the source and the destination addresses aren't
+        * of the same evenness, we're forced to do a bytewise copy.
+        */
+       movl    %a0,%d0
+       addl    %a1,%d0
+       btst    #0,%d0
+       jne     Lbcbbyte
+#endif /* __mc68010__ */
+       
        /* word align */
        movl    %a1,%d0
        btst    #0,%d0          | if (dst & 1)