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diff --git a/tests/ops.expect.c b/tests/ops.expect.c
new file mode 100644
index 0000000..3b59db1
--- /dev/null
+++ b/tests/ops.expect.c
@@ -0,0 +1,38 @@
+int sub_test()
+{
+  u32 eax;
+  u32 ebx;
+  u32 ecx;
+  u32 edx;
+  u32 esi;
+  u32 edi;
+  u32 cond_z;
+
+  ebx = 0x10000;
+  esi = 0x20000;
+  edi = 0x30000;
+  ecx = 0x0a;
+
+loop:
+  LOBYTE(eax) = *(u8 *)esi; esi += 1;  // lods
+  LOBYTE(eax) = *(u8 *)(ebx + LOBYTE(eax));  // xlat
+  *(u8 *)edi = eax; edi += 1;  // stos
+  LOWORD(eax) = *(u16 *)esi; esi += 2;  // lods
+  LOWORD(eax) = -(s16)(u16)eax;
+  *(u16 *)edi = eax; edi += 2;  // stos
+  eax = *(u32 *)esi; esi += 4;  // lods
+  *(u32 *)edi = eax; edi += 4;  // stos
+  *(u8 *)edi = *(u8 *)esi; edi += 1; esi += 1;  // movs
+  cond_z = (*(u16 *)esi == *(u16 *)edi); esi += 2; edi += 2;  // cmps
+  cond_z = ((u8)eax == *(u8 *)edi); edi += 1;  // scas
+  if (--ecx != 0)
+    goto loop;  // loop
+  *(u8 *)edi = eax; edi -= 1;  // stos
+  *(u16 *)edi = eax; edi -= 2;  // stos
+  *(u32 *)edi = eax; edi -= 4;  // stos
+  edx = (s32)eax >> 31;  // cdq
+  eax = ecx ? __builtin_ffs(ecx) - 1 : 0;  // bsf
+  eax = 1;
+  return eax;
+}
+