Windows port work by Ruben Van Boxem
llvm-svn: 142578
diff --git a/libcxx/include/support/win32/limits_win32.h b/libcxx/include/support/win32/limits_win32.h
new file mode 100644
index 0000000..91cdcf1
--- /dev/null
+++ b/libcxx/include/support/win32/limits_win32.h
@@ -0,0 +1,73 @@
+// -*- C++ -*-
+//===--------------------- support/win32/limits_win32.h -------------------===//
+//
+// 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.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef _LIBCPP_SUPPORT_WIN32_LIMITS_WIN32_H
+#define _LIBCPP_SUPPORT_WIN32_LIMITS_WIN32_H
+
+#if !defined(_MSC_VER)
+#error "This header is MSVC specific, Clang and GCC should not include it"
+#else
+
+#include <float.h> // limit constants
+
+#define __FLT_MANT_DIG__ FLT_MANT_DIG
+#define __FLT_DIG__ FLT_DIG
+#define __FLT_RADIX__ FLT_RADIX
+#define __FLT_MIN_EXP__ FLT_MIN_EXP
+#define __FLT_MIN_10_EXP__ FLT_MIN_10_EXP
+#define __FLT_MAX_EXP__ FLT_MAX_EXP
+#define __FLT_MAX_10_EXP__ FLT_MAX_10_EXP
+#define __FLT_MIN__ FLT_MIN
+#define __FLT_MAX__ FLT_MAX
+#define __FLT_EPSILON__ FLT_EPSILON
+// predefined by MinGW GCC
+#define __FLT_DENORM_MIN__ 1.40129846432481707092e-45F
+
+#define __DBL_MANT_DIG__ DBL_MANT_DIG
+#define __DBL_DIG__ DBL_DIG
+#define __DBL_RADIX__ DBL_RADIX
+#define __DBL_MIN_EXP__ DBL_MIN_EXP
+#define __DBL_MIN_10_EXP__ DBL_MIN_10_EXP
+#define __DBL_MAX_EXP__ DBL_MAX_EXP
+#define __DBL_MAX_10_EXP__ DBL_MAX_10_EXP
+#define __DBL_MIN__ DBL_MIN
+#define __DBL_MAX__ DBL_MAX
+#define __DBL_EPSILON__ DBL_EPSILON
+// predefined by MinGW GCC
+#define __DBL_DENORM_MIN__ double(4.94065645841246544177e-324L)
+
+#define __LDBL_MANT_DIG__ LDBL_MANT_DIG
+#define __LDBL_DIG__ LDBL_DIG
+#define __LDBL_RADIX__ LDBL_RADIX
+#define __LDBL_MIN_EXP__ LDBL_MIN_EXP
+#define __LDBL_MIN_10_EXP__ LDBL_MIN_10_EXP
+#define __LDBL_MAX_EXP__ LDBL_MAX_EXP
+#define __LDBL_MAX_10_EXP__ LDBL_MAX_10_EXP
+#define __LDBL_MIN__ LDBL_MIN
+#define __LDBL_MAX__ LDBL_MAX
+#define __LDBL_EPSILON__ LDBL_EPSILON
+// predefined by MinGW GCC
+#define __LDBL_DENORM_MIN__ 3.64519953188247460253e-4951L
+
+// __builtin replacements/workarounds
+#include <ymath.h> // internal MSVC header providing the needed functionality
+#define __builtin_huge_val() HUGE_VAL
+#define __builtin_huge_valf() _FInf
+#define __builtin_huge_vall() _LInf
+#define __builtin_nan() _Nan
+#define __builtin_nanf() _FNan
+#define __builtin_nanl() _LNan
+#define __builtin_nans() _Snan
+#define __builtin_nansf() _FSnan
+#define __builtin_nansl() _LSnan
+
+#endif // _MSC_VER
+
+#endif // _LIBCPP_SUPPORT_WIN32_LIMITS_WIN32_H