microblaze: Add __cmpdi2
Some new kernel configurations require __cmpdi2 function.
Signed-off-by: Michal Simek <monstr@monstr.eu>
diff --git a/arch/microblaze/lib/Makefile b/arch/microblaze/lib/Makefile
index c13067b..844960e 100644
--- a/arch/microblaze/lib/Makefile
+++ b/arch/microblaze/lib/Makefile
@@ -20,6 +20,7 @@
lib-y += ashldi3.o
lib-y += ashrdi3.o
+lib-y += cmpdi2.o
lib-y += divsi3.o
lib-y += lshrdi3.o
lib-y += modsi3.o
diff --git a/arch/microblaze/lib/cmpdi2.c b/arch/microblaze/lib/cmpdi2.c
new file mode 100644
index 0000000..a708400
--- /dev/null
+++ b/arch/microblaze/lib/cmpdi2.c
@@ -0,0 +1,26 @@
+#include <linux/module.h>
+
+#include "libgcc.h"
+
+word_type __cmpdi2(long long a, long long b)
+{
+ const DWunion au = {
+ .ll = a
+ };
+ const DWunion bu = {
+ .ll = b
+ };
+
+ if (au.s.high < bu.s.high)
+ return 0;
+ else if (au.s.high > bu.s.high)
+ return 2;
+
+ if ((unsigned int) au.s.low < (unsigned int) bu.s.low)
+ return 0;
+ else if ((unsigned int) au.s.low > (unsigned int) bu.s.low)
+ return 2;
+
+ return 1;
+}
+EXPORT_SYMBOL(__cmpdi2);
