From: Wei Yongjun <[email protected]>
Signed-off-by: Wei Yongjun <[email protected]>
Signed-off-by: Avi Kivity <[email protected]>
diff --git a/x86/realmode.c b/x86/realmode.c
index 35f6a16..0b90cc3 100644
--- a/x86/realmode.c
+++ b/x86/realmode.c
@@ -1194,6 +1194,32 @@ void test_idiv()
print_serial("idiv Test 3: PASS\n");
}
+void test_cbw(void)
+{
+ struct regs inregs = { 0 }, outregs;
+
+ MK_INSN(cbw, "mov $0xFE, %eax \n\t"
+ "cbw\n\t");
+ MK_INSN(cwde, "mov $0xFFFE, %eax \n\t"
+ "cwde\n\t");
+
+ exec_in_big_real_mode(&inregs, &outregs,
+ insn_cbw,
+ insn_cbw_end - insn_cbw);
+ if (outregs.eax != 0xFFFE)
+ print_serial("cbw test1: FAIL\n");
+ else
+ print_serial("cbw test 1: PASS\n");
+
+ exec_in_big_real_mode(&inregs, &outregs,
+ insn_cwde,
+ insn_cwde_end - insn_cwde);
+ if (outregs.eax != 0xFFFFFFFE)
+ print_serial("cwde test1: FAIL\n");
+ else
+ print_serial("cwde test 1: PASS\n");
+}
+
void realmode_start(void)
{
test_null();
@@ -1221,6 +1247,7 @@ void realmode_start(void)
test_mul();
test_div();
test_idiv();
+ test_cbw();
exit(0);
}
--
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