Unbreak VC++ build.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34917 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/APInt.cpp b/lib/Support/APInt.cpp
index 683211b..08ec236 100644
--- a/lib/Support/APInt.cpp
+++ b/lib/Support/APInt.cpp
@@ -17,6 +17,7 @@
#include "llvm/DerivedTypes.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/MathExtras.h"
+#include <math.h>
#include <cstring>
#include <cstdlib>
#ifndef NDEBUG
@@ -1224,9 +1225,16 @@
// an IEEE double precision floating point value), then we can use the
// libc sqrt function which will probably use a hardware sqrt computation.
// This should be faster than the algorithm below.
- if (magnitude < 52)
+ if (magnitude < 52) {
+#ifdef _MSC_VER
+ // Amazingly, VC++ doesn't have round().
+ return APInt(BitWidth,
+ uint64_t(::sqrt(double(isSingleWord()?VAL:pVal[0]))) + 0.5);
+#else
return APInt(BitWidth,
uint64_t(::round(::sqrt(double(isSingleWord()?VAL:pVal[0])))));
+#endif
+ }
// Okay, all the short cuts are exhausted. We must compute it. The following
// is a classical Babylonian method for computing the square root. This code