Previously, KVM did not calculate the offset for bit-operations correctly when
quad-word operands were used. This test checks btcq when operand is larger
than 64 in order to check this scenario.
Signed-off-by: Nadav Amit <na...@cs.technion.ac.il>
---
x86/emulator.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/x86/emulator.c b/x86/emulator.c
index bf8a873..460949f 100644
--- a/x86/emulator.c
+++ b/x86/emulator.c
@@ -496,7 +496,7 @@ void test_btc(void *mem)
{
unsigned int *a = mem;
- memset(mem, 0, 3 * sizeof(unsigned int));
+ memset(mem, 0, 4 * sizeof(unsigned int));
asm ("btcl $32, %0" :: "m"(a[0]) : "memory");
asm ("btcl $1, %0" :: "m"(a[1]) : "memory");
@@ -505,6 +505,10 @@ void test_btc(void *mem)
asm ("btcl %1, %0" :: "m"(a[3]), "r"(-1) : "memory");
report("btcl reg, r/m", a[0] == 1 && a[1] == 2 && a[2] == 0x80000004);
+
+ asm ("btcq %1, %0" : : "m"(a[2]), "r"(-1l) : "memory");
+ report("btcq reg, r/m", a[0] == 1 && a[1] == 0x80000002 &&
+ a[2] == 0x80000004 && a[3] == 0);
}
void test_bsfbsr(void *mem)
--
1.9.1
--
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