1 files changed, 44 insertions, 0 deletions
diff --git a/lib/fixunsxfdi.c b/lib/fixunsxfdi.c
new file mode 100644
index 000000000000..872727bcd3df
--- /dev/null
+++ b/lib/fixunsxfdi.c
@@ -0,0 +1,44 @@
+/* ===-- fixunsxfdi.c - Implement __fixunsxfdi -----------------------------===
+ *
+ *                     The LLVM Compiler Infrastructure
+ *
+ * This file is distributed under the University of Illinois Open Source
+ * License. See LICENSE.TXT for details.
+ *
+ * ===----------------------------------------------------------------------===
+ *
+ * This file implements __fixunsxfdi for the compiler_rt library.
+ *
+ * ===----------------------------------------------------------------------===
+ */
+
+#if !_ARCH_PPC
+
+#include "int_lib.h"
+
+/* Returns: convert a to a unsigned long long, rounding toward zero.
+ *          Negative values all become zero.
+ */
+
+/* Assumption: long double is an intel 80 bit floating point type padded with 6 bytes
+ *             du_int is a 64 bit integral type
+ *             value in long double is representable in du_int or is negative 
+ *                 (no range checking performed)
+ */
+
+/* gggg gggg gggg gggg gggg gggg gggg gggg | gggg gggg gggg gggg seee eeee eeee eeee |
+ * 1mmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
+ */
+
+du_int
+__fixunsxfdi(long double a)
+{
+    long_double_bits fb;
+    fb.f = a;
+    int e = (fb.u.high.s.low & 0x00007FFF) - 16383;
+    if (e < 0 || (fb.u.high.s.low & 0x00008000))
+        return 0;
+    return fb.u.low.all >> (63 - e);
+}
+
+#endif