1 files changed, 63 insertions, 0 deletions
diff --git a/src/VBox/Disassembler/testcase/tstAsmSignExtend-1.asm b/src/VBox/Disassembler/testcase/tstAsmSignExtend-1.asm
new file mode 100644
index 00000000..0b3228ca
--- /dev/null
+++ b/src/VBox/Disassembler/testcase/tstAsmSignExtend-1.asm
@@ -0,0 +1,63 @@
+; $Id: tstAsmSignExtend-1.asm $
+;; @file
+; Disassembly testcase - Valid sign extension instructions.
+;
+; This is a build test, that means it will be assembled, disassembled,
+; then the disassembly output will be assembled and the new binary will
+; compared with the original.
+;
+
+;
+; Copyright (C) 2008-2023 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>.
+;
+; SPDX-License-Identifier: GPL-3.0-only
+;
+
+%include "tstAsm.mac"
+    BITS TEST_BITS
+
+    movsx ax, al
+    movsx eax, al
+    movsx eax, ax
+
+    ;
+    ; ParseImmByteSX
+    ;
+
+    ; 83 /x
+    add eax, strict byte 8
+    add eax, strict byte -1
+    cmp ebx, strict byte -1
+
+    add ax, strict byte 8
+    add ax, strict byte -1
+    cmp bx, strict byte -1
+
+%if TEST_BITS == 64 ; check that these come out with qword values and not words or dwords.
+    add rax, strict byte 8
+    add rax, strict byte -1
+    cmp rbx, strict byte -1
+%endif
+
+    ; push %Ib
+    push strict byte -1
+    push strict byte -128
+    push strict byte 127
+
+    ;; @todo imul