GBE: fixed a long related bug.

We need to consider the situation that the 64 bit virtual register
is crossing two GRFs.

Signed-off-by: Zhigang Gong <zhigang.gong@intel.com>
Reviewed-by: "Yang, Rong R" <rong.r.yang@intel.com>

diff --git a/backend/src/backend/gen_register.hpp b/backend/src/backend/gen_register.hpp
index 73d8ffa..57c78d9 100644 (file)
--- a/backend/src/backend/gen_register.hpp
+++ b/backend/src/backend/gen_register.hpp
@@ -270,6 +270,8 @@ namespace gbe
     INLINE GenRegister top_half(void) const {
       GenRegister r = bottom_half();
       r.subnr += 4;
+      r.nr += r.subnr / 32;
+      r.subnr %= 32;
       return r;
     }