[Beignet] [PATCH 01/13] Backend: Add sr0 reg helper function.

[junyan.he at inbox.com]

From: Junyan He <junyan.he at linux.intel.com>

sr0 is used to specify the state reigster where we can get the
state of each EU thread.

Signed-off-by: Junyan He <junyan.he at linux.intel.com>
---
 backend/src/backend/gen75_context.cpp |    8 +-------
 backend/src/backend/gen_register.hpp  |   10 ++++++++++
 2 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/backend/src/backend/gen75_context.cpp b/backend/src/backend/gen75_context.cpp
index 7d407c3..fa8b029 100644
--- a/backend/src/backend/gen75_context.cpp
+++ b/backend/src/backend/gen75_context.cpp
@@ -44,13 +44,7 @@ namespace gbe
     p->push();
       p->curr.execWidth = 1;
       p->curr.predicate = GEN_PREDICATE_NONE;
-      GenRegister sr0 = GenRegister(GEN_ARCHITECTURE_REGISTER_FILE,
-                                    GEN_ARF_STATE,
-                                    1,
-                                    GEN_TYPE_UD,
-                                    GEN_VERTICAL_STRIDE_8,
-                                    GEN_WIDTH_8,
-                                    GEN_HORIZONTAL_STRIDE_1);
+      GenRegister sr0 = GenRegister::sr(0, 1);
       p->SHR(sr0, slm_index, GenRegister::immud(16));
     p->pop();
   }
diff --git a/backend/src/backend/gen_register.hpp b/backend/src/backend/gen_register.hpp
index 5c813be..aa0744b 100644
--- a/backend/src/backend/gen_register.hpp
+++ b/backend/src/backend/gen_register.hpp
@@ -828,6 +828,16 @@ namespace gbe
                          GEN_HORIZONTAL_STRIDE_0);
     }
 
+    static INLINE GenRegister sr(uint32_t nr, uint32_t subnr = 0) {
+      return GenRegister(GEN_ARCHITECTURE_REGISTER_FILE,
+                         GEN_ARF_STATE | nr,
+                         subnr,
+                         GEN_TYPE_UD,
+                         GEN_VERTICAL_STRIDE_8,
+                         GEN_WIDTH_8,
+                         GEN_HORIZONTAL_STRIDE_1);
+    }
+
     static INLINE GenRegister notification0(uint32_t subnr) {
       return GenRegister(GEN_ARCHITECTURE_REGISTER_FILE,
                          GEN_ARF_NOTIFICATION_COUNT,
-- 
1.7.9.5