mn10300: provide __ucmpdi2() for MN10300
David Howells [Fri, 4 Jul 2008 16:59:47 +0000 (09:59 -0700)]
Provide __ucmpdi2() for MN10300 so that allmodconfig can be built.

Signed-off-by: David Howells <dhowells@redhat.com>
Cc: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/mn10300/kernel/mn10300_ksyms.c
arch/mn10300/lib/Makefile
arch/mn10300/lib/__ucmpdi2.S [new file with mode: 0644]

index 544ee1a..f9eb975 100644 (file)
@@ -34,7 +34,9 @@ extern u64 __ashrdi3(u64, unsigned);
 extern u64 __ashldi3(u64, unsigned);
 extern u64 __lshrdi3(u64, unsigned);
 extern s64 __negdi2(s64);
+extern int __ucmpdi2(u64, u64);
 EXPORT_SYMBOL(__ashrdi3);
 EXPORT_SYMBOL(__ashldi3);
 EXPORT_SYMBOL(__lshrdi3);
 EXPORT_SYMBOL(__negdi2);
+EXPORT_SYMBOL(__ucmpdi2);
index fdfa9ec..0cd2346 100644 (file)
@@ -4,4 +4,4 @@
 
 lib-y = delay.o usercopy.o checksum.o bitops.o memcpy.o memmove.o memset.o
 lib-y += do_csum.o
-lib-y += __ashldi3.o __ashrdi3.o __lshrdi3.o negdi2.o
+lib-y += __ashldi3.o __ashrdi3.o __lshrdi3.o negdi2.o __ucmpdi2.o
diff --git a/arch/mn10300/lib/__ucmpdi2.S b/arch/mn10300/lib/__ucmpdi2.S
new file mode 100644 (file)
index 0000000..60dcbdf
--- /dev/null
@@ -0,0 +1,43 @@
+/* __ucmpdi2.S: 64-bit unsigned compare
+ *
+ * Copyright (C) 2008 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+
+        .text
+        .p2align       4
+
+###############################################################################
+#
+# int __ucmpdi2(unsigned long long a [D0:D1],
+#              unsigned long long b [(SP,12),(SP,16)])
+#
+# - returns 0, 1, or 2 as a <, =, > b respectively.
+#
+###############################################################################
+        .globl         __ucmpdi2
+        .type          __ucmpdi2,@function
+__ucmpdi2:
+       mov             (12,sp),a0              # b.lsw
+       mov             (16,sp),a1              # b.msw
+
+       sub             a0,d0
+       subc            a1,d1                   # may clear Z, never sets it
+       bne             __ucmpdi2_differ        # a.msw != b.msw
+       mov             +1,d0
+       rets
+
+__ucmpdi2_differ:
+       # C flag is set if LE, clear if GE
+       subc            d0,d0                   # -1 if LE, 0 if GE
+       add             +1,d0                   #  0 if LE, 1 if GE
+       add             d0,d0                   #  0 if LE, 2 if GE
+       rets
+
+       .size           __ucmpdi2, .-__ucmpdi2