2 files changed, 21 insertions, 0 deletions

diff --git a/arch/microblaze/lib/Makefile b/arch/microblaze/lib/Makefile
index 10c320aa908b..c13067b243c3 100644
--- a/arch/microblaze/lib/Makefile
+++ b/arch/microblaze/lib/Makefile
@@ -25,5 +25,6 @@ lib-y += lshrdi3.o
 lib-y += modsi3.o
 lib-y += muldi3.o
 lib-y += mulsi3.o
+lib-y += ucmpdi2.o
 lib-y += udivsi3.o
 lib-y += umodsi3.o
diff --git a/arch/microblaze/lib/ucmpdi2.c b/arch/microblaze/lib/ucmpdi2.c
new file mode 100644
index 000000000000..63ca105b6713
--- /dev/null
+++ b/arch/microblaze/lib/ucmpdi2.c
@@ -0,0 +1,20 @@
+#include <linux/module.h>
+
+#include "libgcc.h"
+
+word_type __ucmpdi2(unsigned long long a, unsigned long long b)
+{
+        const DWunion au = {.ll = a};
+        const DWunion bu = {.ll = b};
+
+        if ((unsigned int) au.s.high < (unsigned int) bu.s.high)
+                return 0;
+        else if ((unsigned int) au.s.high > (unsigned int) 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(__ucmpdi2);