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-rw-r--r--arch/blackfin/lib/lshrdi3.c35
1 files changed, 35 insertions, 0 deletions
diff --git a/arch/blackfin/lib/lshrdi3.c b/arch/blackfin/lib/lshrdi3.c
new file mode 100644
index 00000000000..53f1741047e
--- /dev/null
+++ b/arch/blackfin/lib/lshrdi3.c
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2004-2009 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include "gcclib.h"
+
+#ifdef CONFIG_ARITHMETIC_OPS_L1
+DItype __lshrdi3(DItype u, word_type b)__attribute__((l1_text));
+#endif
+
+DItype __lshrdi3(DItype u, word_type b)
+{
+ DIunion w;
+ word_type bm;
+ DIunion uu;
+
+ if (b == 0)
+ return u;
+
+ uu.ll = u;
+
+ bm = (sizeof(SItype) * BITS_PER_UNIT) - b;
+ if (bm <= 0) {
+ w.s.high = 0;
+ w.s.low = (USItype) uu.s.high >> -bm;
+ } else {
+ USItype carries = (USItype) uu.s.high << bm;
+ w.s.high = (USItype) uu.s.high >> b;
+ w.s.low = ((USItype) uu.s.low >> b) | carries;
+ }
+
+ return w.ll;
+}