[Beignet] [PATCH] Backend: Fix the selection optimize element calculate.

[Yang Rong]

After GenRegister offset  refined, we need to calculate the suboffset with nr and subnr.

Signed-off-by: Yang Rong <rong.r.yang at intel.com>
---
 backend/src/backend/gen_insn_selection_optimize.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/backend/src/backend/gen_insn_selection_optimize.cpp b/backend/src/backend/gen_insn_selection_optimize.cpp
index b8aa776..a0778ed 100644
--- a/backend/src/backend/gen_insn_selection_optimize.cpp
+++ b/backend/src/backend/gen_insn_selection_optimize.cpp
@@ -22,7 +22,7 @@ namespace gbe
     uint32_t height = execWidth / width;
     uint32_t vstride = GenRegister::vstride_size(reg);
     uint32_t hstride = GenRegister::hstride_size(reg);
-    uint32_t base = reg.subnr;
+    uint32_t base = reg.nr * GEN_REG_SIZE + reg.subnr;
     for (uint32_t i = 0; i < height; ++i) {
       uint32_t offsetInByte = base;
       for (uint32_t j = 0; j < width; ++j) {
-- 
2.1.4