1 files changed, 63 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/math/copysign.cpp b/src/VBox/Runtime/common/math/copysign.cpp
new file mode 100644
index 00000000..db9fb370
--- /dev/null
+++ b/src/VBox/Runtime/common/math/copysign.cpp
@@ -0,0 +1,63 @@
+/* $Id: copysign.cpp $ */
+/** @file
+ * IPRT - No-CRT - copysign().
+ */
+
+/*
+ * Copyright (C) 2022-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#define IPRT_NO_CRT_FOR_3RD_PARTY
+#include "internal/nocrt.h"
+#include <iprt/nocrt/math.h>
+#include <iprt/assertcompile.h>
+
+
+#undef copysign
+double RT_NOCRT(copysign)(double rdMagnitude, double rdSign)
+{
+    AssertCompile(sizeof(rdMagnitude) == sizeof(RTFLOAT64U));
+#ifndef RT_LITTLE_ENDIAN /* MSC outputs a lot better code for the alternative below. */
+    RTFLOAT64U uRet, uSign;
+    uSign.rd     = rdSign;
+    uRet.rd      = rdMagnitude;
+    uRet.s.fSign = uSign.s.fSign;
+#else
+    RTFLOAT64U uRet;
+    uRet.u = (*(uint64_t const *)&rdMagnitude & (RT_BIT_64(63) - 1U)) | (*(uint64_t const *)&rdSign & RT_BIT_64(63));
+#endif
+    return uRet.rd;
+}
+RT_ALIAS_AND_EXPORT_NOCRT_SYMBOL(copysign);
+