This patch add test for xchg instruction.
Signed-off-by: Wei Yongjun <yjwei@xxxxxxxxxxxxxx>
---
kvm/test/x86/emulator.c | 52 +++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 52 insertions(+), 0 deletions(-)
diff --git a/kvm/test/x86/emulator.c b/kvm/test/x86/emulator.c
index 6db1305..2af3d96 100644
--- a/kvm/test/x86/emulator.c
+++ b/kvm/test/x86/emulator.c
@@ -270,6 +270,56 @@ void test_lmsw(void)
asm("lmsw %0" : : "r"(msw));
}
+void test_xchg(void *mem)
+{
+ unsigned long *memq = mem;
+ unsigned long rax;
+
+ asm volatile("mov $0x123456789abcdef, %%rax\n\t"
+ "mov %%rax, (%[memq])\n\t"
+ "mov $0xfedcba9876543210, %%rax\n\t"
+ "xchg %%al, (%[memq])\n\t"
+ "mov %%rax, %[rax]\n\t"
+ : [rax]"=r"(rax)
+ : [memq]"r"(memq)
+ : "memory");
+ report("xchg reg, r/m (1)",
+ rax == 0xfedcba98765432ef && *memq == 0x123456789abcd10);
+
+ asm volatile("mov $0x123456789abcdef, %%rax\n\t"
+ "mov %%rax, (%[memq])\n\t"
+ "mov $0xfedcba9876543210, %%rax\n\t"
+ "xchg %%ax, (%[memq])\n\t"
+ "mov %%rax, %[rax]\n\t"
+ : [rax]"=r"(rax)
+ : [memq]"r"(memq)
+ : "memory");
+ report("xchg reg, r/m (2)",
+ rax == 0xfedcba987654cdef && *memq == 0x123456789ab3210);
+
+ asm volatile("mov $0x123456789abcdef, %%rax\n\t"
+ "mov %%rax, (%[memq])\n\t"
+ "mov $0xfedcba9876543210, %%rax\n\t"
+ "xchg %%eax, (%[memq])\n\t"
+ "mov %%rax, %[rax]\n\t"
+ : [rax]"=r"(rax)
+ : [memq]"r"(memq)
+ : "memory");
+ report("xchg reg, r/m (3)",
+ rax == 0x89abcdef && *memq == 0x123456776543210);
+
+ asm volatile("mov $0x123456789abcdef, %%rax\n\t"
+ "mov %%rax, (%[memq])\n\t"
+ "mov $0xfedcba9876543210, %%rax\n\t"
+ "xchg %%rax, (%[memq])\n\t"
+ "mov %%rax, %[rax]\n\t"
+ : [rax]"=r"(rax)
+ : [memq]"r"(memq)
+ : "memory");
+ report("xchg reg, r/m (4)",
+ rax == 0x123456789abcdef && *memq == 0xfedcba9876543210);
+}
+
int main()
{
void *mem;
@@ -292,6 +342,8 @@ int main()
test_push(mem);
test_pop(mem);
+ test_xchg(mem);
+
test_cr8();
test_smsw();
--
1.7.0.4
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