Signed-off-by: Wei Yongjun <[email protected]>
---
x86/emulator.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 51 insertions(+), 0 deletions(-)
diff --git a/x86/emulator.c b/x86/emulator.c
index 348d548..c4579ab 100644
--- a/x86/emulator.c
+++ b/x86/emulator.c
@@ -360,6 +360,56 @@ void test_xchg(void *mem)
rax == 0x123456789abcdef && *memq == 0xfedcba9876543210);
}
+void test_xadd(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"
+ "xadd %%al, (%[memq])\n\t"
+ "mov %%rax, %[rax]\n\t"
+ : [rax]"=r"(rax)
+ : [memq]"r"(memq)
+ : "memory");
+ report("xadd reg, r/m (1)",
+ rax == 0xfedcba98765432ef && *memq == 0x123456789abcdff);
+
+ asm volatile("mov $0x123456789abcdef, %%rax\n\t"
+ "mov %%rax, (%[memq])\n\t"
+ "mov $0xfedcba9876543210, %%rax\n\t"
+ "xadd %%ax, (%[memq])\n\t"
+ "mov %%rax, %[rax]\n\t"
+ : [rax]"=r"(rax)
+ : [memq]"r"(memq)
+ : "memory");
+ report("xadd reg, r/m (2)",
+ rax == 0xfedcba987654cdef && *memq == 0x123456789abffff);
+
+ asm volatile("mov $0x123456789abcdef, %%rax\n\t"
+ "mov %%rax, (%[memq])\n\t"
+ "mov $0xfedcba9876543210, %%rax\n\t"
+ "xadd %%eax, (%[memq])\n\t"
+ "mov %%rax, %[rax]\n\t"
+ : [rax]"=r"(rax)
+ : [memq]"r"(memq)
+ : "memory");
+ report("xadd reg, r/m (3)",
+ rax == 0x89abcdef && *memq == 0x1234567ffffffff);
+
+ asm volatile("mov $0x123456789abcdef, %%rax\n\t"
+ "mov %%rax, (%[memq])\n\t"
+ "mov $0xfedcba9876543210, %%rax\n\t"
+ "xadd %%rax, (%[memq])\n\t"
+ "mov %%rax, %[rax]\n\t"
+ : [rax]"=r"(rax)
+ : [memq]"r"(memq)
+ : "memory");
+ report("xadd reg, r/m (4)",
+ rax == 0x123456789abcdef && *memq == 0xffffffffffffffff);
+}
+
void test_btc(void *mem)
{
unsigned int *a = mem;
@@ -548,6 +598,7 @@ int main()
test_pop(mem);
test_xchg(mem);
+ test_xadd(mem);
test_cr8();
--
1.7.0.4
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