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diff --git a/src/VBox/Runtime/common/math/fabsl.asm b/src/VBox/Runtime/common/math/fabsl.asm
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+; $Id: fabsl.asm $
+;; @file
+; IPRT - No-CRT fabsl - AMD64 & X86.
+;
+
+;
+; Copyright (C) 2006-2019 Oracle Corporation
+;
+; This file is part of VirtualBox Open Source Edition (OSE), as
+; available from http://www.virtualbox.org. This file is free software;
+; you can redistribute it and/or modify it under the terms of the GNU
+; General Public License (GPL) as published by the Free Software
+; Foundation, in version 2 as it comes in the "COPYING" file of the
+; VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+;
+; The contents of this file may alternatively be used under the terms
+; of the Common Development and Distribution License Version 1.0
+; (CDDL) only, as it comes in the "COPYING.CDDL" file of the
+; VirtualBox OSE 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.
+;
+
+%include "iprt/asmdefs.mac"
+
+BEGINCODE
+
+;;
+; Compute the absolute value of lrd (|lrd|).
+; @returns st(0)
+; @param lrd [xSP + xCB*2]
+BEGINPROC RT_NOCRT(fabsl)
+ push xBP
+ mov xBP, xSP
+
+ fld tword [xBP + xCB*2]
+ fabs
+
+.done:
+ leave
+ ret
+ENDPROC RT_NOCRT(fabsl)
+