From: Wei Yongjun <[email protected]>
Signed-off-by: Wei Yongjun <[email protected]>
Signed-off-by: Marcelo Tosatti <[email protected]>
diff --git a/x86/realmode.c b/x86/realmode.c
index 8c771fc..a833829 100644
--- a/x86/realmode.c
+++ b/x86/realmode.c
@@ -1242,6 +1242,47 @@ void test_lds_lss()
outregs.ebx == desc.sel);
}
+void test_jcxz(void)
+{
+ MK_INSN(jcxz1, "jcxz 1f\n\t"
+ "mov $0x1234, %eax\n\t"
+ "1:\n\t");
+ MK_INSN(jcxz2, "mov $0x100, %ecx\n\t"
+ "jcxz 1f\n\t"
+ "mov $0x1234, %eax\n\t"
+ "mov $0, %ecx\n\t"
+ "1:\n\t");
+ MK_INSN(jcxz3, "mov $0x10000, %ecx\n\t"
+ "jcxz 1f\n\t"
+ "mov $0x1234, %eax\n\t"
+ "1:\n\t");
+ MK_INSN(jecxz1, "jecxz 1f\n\t"
+ "mov $0x1234, %eax\n\t"
+ "1:\n\t");
+ MK_INSN(jecxz2, "mov $0x10000, %ecx\n\t"
+ "jecxz 1f\n\t"
+ "mov $0x1234, %eax\n\t"
+ "mov $0, %ecx\n\t"
+ "1:\n\t");
+
+ inregs = (struct regs){ 0 };
+
+ exec_in_big_real_mode(&insn_jcxz1);
+ report("jcxz short 1", 0, 1);
+
+ exec_in_big_real_mode(&insn_jcxz2);
+ report("jcxz short 2", R_AX, outregs.eax == 0x1234);
+
+ exec_in_big_real_mode(&insn_jcxz3);
+ report("jcxz short 3", R_CX, outregs.ecx == 0x10000);
+
+ exec_in_big_real_mode(&insn_jecxz1);
+ report("jecxz short 1", 0, 1);
+
+ exec_in_big_real_mode(&insn_jecxz2);
+ report("jecxz short 2", R_AX, outregs.eax == 0x1234);
+}
+
void realmode_start(void)
{
test_null();
@@ -1274,6 +1315,7 @@ void realmode_start(void)
test_cwd_cdq();
test_das();
test_lds_lss();
+ test_jcxz();
exit(0);
}
--
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