1 files changed, 38 insertions, 0 deletions
diff --git a/test/support/hexfloat.h b/test/support/hexfloat.h
new file mode 100644
index 0000000000000..7ef093714fed0
--- /dev/null
+++ b/test/support/hexfloat.h
@@ -0,0 +1,38 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// Define a hexfloat literal emulator since we can't depend on being able to
+//   for hexfloat literals
+
+// 0x10.F5p-10 == hexfloat<double>(0x10, 0xF5, -10)
+
+#ifndef HEXFLOAT_H
+#define HEXFLOAT_H
+
+#include <algorithm>
+#include <cmath>
+#include <climits>
+
+template <class T>
+class hexfloat
+{
+    T value_;
+public:
+    hexfloat(long long m1, unsigned long long m0, int exp)
+    {
+        const std::size_t n = sizeof(unsigned long long) * CHAR_BIT;
+        int s = m1 < 0 ? -1 : 1;
+        value_ = std::ldexp(m1 + s * std::ldexp(T(m0), -static_cast<int>(n -
+                                                     std::__clz(m0)/4*4)), exp);
+    }
+
+    operator T() const {return value_;}
+};
+
+#endif