From: Wei Yongjun <[email protected]> This patch add test for xchg instruction.
Signed-off-by: Wei Yongjun <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]> diff --git a/kvm/test/x86/emulator.c b/kvm/test/x86/emulator.c index 87ce9bc..db6a134 100644 --- a/kvm/test/x86/emulator.c +++ b/kvm/test/x86/emulator.c @@ -295,6 +295,56 @@ 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; @@ -317,6 +367,8 @@ int main() test_push(mem); test_pop(mem); + test_xchg(mem); + test_cr8(); test_smsw(); -- To unsubscribe from this list: send the line "unsubscribe kvm-commits" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
