From: Avi Kivity <[EMAIL PROTECTED]>
Signed-off-by: Avi Kivity <[EMAIL PROTECTED]>
diff --git a/user/test/x86/emulator.c b/user/test/x86/emulator.c
index 54f7662..26c9aaa 100644
--- a/user/test/x86/emulator.c
+++ b/user/test/x86/emulator.c
@@ -128,6 +128,28 @@ void test_push(void *mem)
report("push mem", stack_top[-3] == 0x123456789abcdeful);
}
+void test_smsw(void *mem)
+{
+ unsigned short msw, msw_orig, *pmsw;
+ unsigned long cr0;
+ int i, zero;
+
+ asm("mov %%cr0, %0" : "=r"(cr0));
+ msw_orig = cr0;
+
+ asm("smsw %0" : "=r"(msw));
+ report("smsw (1)", msw == msw_orig);
+
+ memset(mem, 0, 16);
+ pmsw = mem;
+ asm("smsw %0" : "=m"(pmsw[4]));
+ zero = 1;
+ for (i = 0; i < 8; ++i)
+ if (i != 4 && pmsw[i])
+ zero = 0;
+ report("smsw (2)", msw == pmsw[4] && zero);
+}
+
int main()
{
void *mem;
@@ -151,6 +173,8 @@ int main()
test_cr8();
+ test_smsw(mem);
+
printf("\nSUMMARY: %d tests, %d failures\n", tests, fails);
return fails ? 1 : 0;
}
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