Initial import of compiler-rt.
-
llvm-svn: 74292
diff --git a/compiler-rt/lib/fixunsxfsi.c b/compiler-rt/lib/fixunsxfsi.c
new file mode 100644
index 0000000..2c186a6
--- /dev/null
+++ b/compiler-rt/lib/fixunsxfsi.c
@@ -0,0 +1,40 @@
+//===-- fixunsxfsi.c - Implement __fixunsxfsi -----------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements __fixunsxfsi for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#if !_ARCH_PPC
+
+#include "int_lib.h"
+
+// Returns: convert a to a unsigned int, rounding toward zero.
+// Negative values all become zero.
+
+// Assumption: long double is an intel 80 bit floating point type padded with 6 bytes
+// su_int is a 32 bit integral type
+// value in long double is representable in su_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
+
+su_int
+__fixunsxfsi(long double a)
+{
+ long_double_bits fb;
+ fb.f = a;
+ int e = (fb.u.high.low & 0x00007FFF) - 16383;
+ if (e < 0 || (fb.u.high.low & 0x00008000))
+ return 0;
+ return fb.u.low.high >> (31 - e);
+}
+
+#endif