Adding upstream version 6.0.4-dfsg.upstream/6.0.4-dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 68 insertions, 0 deletions

diff --git a/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-wc16-I8RS.asm b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-wc16-I8RS.asm
new file mode 100644
index 00000000..d231f2cc
--- /dev/null
+++ b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-wc16-I8RS.asm
@@ -0,0 +1,68 @@
+; $Id: bs3-wc16-I8RS.asm $
+;; @file
+; BS3Kit - 16-bit Watcom C/C++, 64-bit signed integer right shift.
+;
+
+;
+; Copyright (C) 2007-2019 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 "bs3kit-template-header.mac"
+
+
+;;
+; 64-bit signed integer left shift.
+;
+; @returns  AX:BX:CX:DX (AX is the most significant, DX the least)
+; @param    AX:BX:CX:DX Value to shift.
+; @param    SI          Shift count.
+;
+global $_?I8RS
+$_?I8RS:
+        push    si
+
+        ;
+        ; The 16-bit watcom code differs from the 32-bit one in the way it
+        ; handles the shift count. All 16-bit bits are used in the 16-bit
+        ; code, we do the same as the 32-bit one as we don't want to wast
+        ; time in the below loop.
+        ;
+        ; Using 8086 comatible approach here as it's less hazzle to write
+        ; and smaller.
+        ;
+        and     si, 3fh
+        jz      .return
+
+.next_shift:
+        sar     ax, 1
+        rcr     bx, 1
+        rcr     cx, 1
+        rcr     dx, 1
+        dec     si
+        jnz     .next_shift
+
+.return:
+        pop     si
+%ifdef ASM_MODEL_FAR_CODE
+        retf
+%else
+        ret
+%endif
+