improve portability to systems that don't have round, patch by
Evzen Muller!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103877 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/APInt.cpp b/lib/Support/APInt.cpp
index 50025d2..1341d21 100644
--- a/lib/Support/APInt.cpp
+++ b/lib/Support/APInt.cpp
@@ -1382,13 +1382,12 @@
// libc sqrt function which will probably use a hardware sqrt computation.
// This should be faster than the algorithm below.
if (magnitude < 52) {
-#if defined( _MSC_VER ) || defined(_MINIX)
- // Amazingly, VC++ and Minix don't have round().
- return APInt(BitWidth,
- uint64_t(::sqrt(double(isSingleWord()?VAL:pVal[0]))) + 0.5);
-#else
+#if HAVE_ROUND
return APInt(BitWidth,
uint64_t(::round(::sqrt(double(isSingleWord()?VAL:pVal[0])))));
+#else
+ return APInt(BitWidth,
+ uint64_t(::sqrt(double(isSingleWord()?VAL:pVal[0]))) + 0.5);
#endif
}