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-rw-r--r--lib/lshrdi3.c32
1 files changed, 32 insertions, 0 deletions
diff --git a/lib/lshrdi3.c b/lib/lshrdi3.c
new file mode 100644
index 000000000..312838ce2
--- /dev/null
+++ b/lib/lshrdi3.c
@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * lib/lshrdi3.c
+ */
+
+#include <linux/module.h>
+#include <linux/libgcc.h>
+
+long long notrace __lshrdi3(long long u, word_type b)
+{
+ DWunion uu, w;
+ word_type bm;
+
+ if (b == 0)
+ return u;
+
+ uu.ll = u;
+ bm = 32 - b;
+
+ if (bm <= 0) {
+ w.s.high = 0;
+ w.s.low = (unsigned int) uu.s.high >> -bm;
+ } else {
+ const unsigned int carries = (unsigned int) uu.s.high << bm;
+
+ w.s.high = (unsigned int) uu.s.high >> b;
+ w.s.low = ((unsigned int) uu.s.low >> b) | carries;
+ }
+
+ return w.ll;
+}
+EXPORT_SYMBOL(__lshrdi3);