From: Avi Kivity <[email protected]>
Signed-off-by: Avi Kivity <[email protected]>
diff --git a/x86/emulator.c b/x86/emulator.c
index a302ffd..04adce7 100644
--- a/x86/emulator.c
+++ b/x86/emulator.c
@@ -121,6 +121,46 @@ void test_cmps(void *mem)
test_cmps_one(m1, m2);
}
+void test_scas(void *mem)
+{
+ bool z;
+ void *di;
+
+ *(ulong *)mem = 0x77665544332211;
+
+ di = mem;
+ asm ("scasb; setz %0" : "=rm"(z), "+D"(di) : "a"(0xff11));
+ report("scasb match", di == mem + 1 && z);
+
+ di = mem;
+ asm ("scasb; setz %0" : "=rm"(z), "+D"(di) : "a"(0xff54));
+ report("scasb mismatch", di == mem + 1 && !z);
+
+ di = mem;
+ asm ("scasw; setz %0" : "=rm"(z), "+D"(di) : "a"(0xff2211));
+ report("scasw match", di == mem + 2 && z);
+
+ di = mem;
+ asm ("scasw; setz %0" : "=rm"(z), "+D"(di) : "a"(0xffdd11));
+ report("scasw mismatch", di == mem + 2 && !z);
+
+ di = mem;
+ asm ("scasl; setz %0" : "=rm"(z), "+D"(di) : "a"(0xff44332211ul));
+ report("scasd match", di == mem + 4 && z);
+
+ di = mem;
+ asm ("scasl; setz %0" : "=rm"(z), "+D"(di) : "a"(0x45332211));
+ report("scasd mismatch", di == mem + 4 && !z);
+
+ di = mem;
+ asm ("scasq; setz %0" : "=rm"(z), "+D"(di) : "a"(0x77665544332211ul));
+ report("scasq match", di == mem + 8 && z);
+
+ di = mem;
+ asm ("scasq; setz %0" : "=rm"(z), "+D"(di) : "a"(3));
+ report("scasq mismatch", di == mem + 8 && !z);
+}
+
void test_cr8(void)
{
unsigned long src, dst;
@@ -506,6 +546,7 @@ int main()
report("mov reg, r/m (1)", t2 == 0x123456789abcdef);
test_cmps(mem);
+ test_scas(mem);
test_push(mem);
test_pop(mem);
--
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