1 files changed, 15 insertions, 0 deletions

diff --git a/arch/powerpc/kernel/misc_32.S b/arch/powerpc/kernel/misc_32.S
index 5c2e253ddfb1..9d2c56621f1e 100644
--- a/arch/powerpc/kernel/misc_32.S
+++ b/arch/powerpc/kernel/misc_32.S
@@ -785,6 +785,21 @@ _GLOBAL(__lshrdi3)
         or      r4,r4,r7        # LSW |= t2
         blr
 
+/*
+ * 64-bit comparison: __ucmpdi2(u64 a, u64 b)
+ * Returns 0 if a < b, 1 if a == b, 2 if a > b.
+ */
+_GLOBAL(__ucmpdi2)
+        cmplw   r3,r5
+        li      r3,1
+        bne     1f
+        cmplw   r4,r6
+        beqlr
+1:      li      r3,0
+        bltlr
+        li      r3,2
+        blr
+
 _GLOBAL(abs)
         srawi   r4,r3,31
         xor     r3,r3,r4