microblaze: Add __ucmpdi2() helper function

Add missing __ucmpdi2 helper function.

Error log:
kernel/built-in.o: In function `print_graph_duration':
: undefined reference to `__ucmpdi2'
kernel/built-in.o: In function `print_graph_duration':
: undefined reference to `__ucmpdi2'

Based on MIPS code.

Signed-off-by: Michal Simek <monstr@monstr.eu>

diff --git a/arch/microblaze/lib/Makefile b/arch/microblaze/lib/Makefile
index 10c320aa908b2325963264271c3673175feb931f..c13067b243c3925e486bef404a1ac80aba5ebc6a 100644 (file)
--- 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 (file)
index 0000000..63ca105
--- /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);