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authorMichal Simek <monstr@monstr.eu>2011-11-29 13:05:30 +0100
committerMichal Simek <monstr@monstr.eu>2012-01-05 08:22:01 +0100
commiteecb20720f1b29019725515051e41bc7c079f91f (patch)
treedc036d11be79fa80b312aa716fc5a396e174efda /arch/microblaze/lib
parented705633d3aba5ff442ca5b7a02bf19edfa811b5 (diff)
downloadlinux-eecb20720f1b29019725515051e41bc7c079f91f.tar.gz
microblaze: Add __cmpdi2
Some new kernel configurations require __cmpdi2 function. Signed-off-by: Michal Simek <monstr@monstr.eu>
Diffstat (limited to 'arch/microblaze/lib')
-rw-r--r--arch/microblaze/lib/Makefile1
-rw-r--r--arch/microblaze/lib/cmpdi2.c26
2 files changed, 27 insertions, 0 deletions
diff --git a/arch/microblaze/lib/Makefile b/arch/microblaze/lib/Makefile
index c13067b243c..844960e8ae1 100644
--- a/arch/microblaze/lib/Makefile
+++ b/arch/microblaze/lib/Makefile
@@ -20,6 +20,7 @@ lib-y += uaccess_old.o
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 00000000000..a708400ea7b
--- /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);