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-rw-r--r--arch/sh/lib/div64.S46
1 files changed, 46 insertions, 0 deletions
diff --git a/arch/sh/lib/div64.S b/arch/sh/lib/div64.S
new file mode 100644
index 000000000000..eefc275d64a7
--- /dev/null
+++ b/arch/sh/lib/div64.S
@@ -0,0 +1,46 @@
+/*
+ * unsigned long long __xdiv64_32(unsigned long long n, unsigned long d);
+ */
+
+#include <linux/linkage.h>
+
+.text
+ENTRY(__xdiv64_32)
+#ifdef __LITTLE_ENDIAN__
+ mov r4, r0
+ mov r5, r1
+#else
+ mov r4, r1
+ mov r5, r0
+#endif
+ cmp/hs r6, r1
+ bf.s 1f
+ mov #0, r2
+
+ mov r1, r2
+ mov #0, r3
+ div0u
+ .rept 32
+ rotcl r2
+ div1 r6, r3
+ .endr
+ rotcl r2
+ mul.l r6, r2
+ sts macl, r3
+ sub r3, r1
+1:
+ div0u
+ .rept 32
+ rotcl r0
+ div1 r6, r1
+ .endr
+#ifdef __LITTLE_ENDIAN__
+ mov r2, r1
+ rts
+ rotcl r0
+#else
+ rotcl r0
+ mov r0, r1
+ rts
+ mov r2, r0
+#endif