[Beignet] [PATCH 03/13] Backend: Add threadid as a curbe register.

[junyan.he at inbox.com]

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

We need to build a map between logical workgroup thread and
real hw thread. This curbe will hold the logical workgroup thread
ID when it is executed on some HW thread.

Signed-off-by: Junyan He <junyan.he at linux.intel.com>
---
 backend/src/backend/program.h  |    1 +
 backend/src/ir/instruction.cpp |    2 +-
 backend/src/ir/profile.cpp     |    4 +++-
 backend/src/ir/profile.hpp     |    3 ++-
 4 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/backend/src/backend/program.h b/backend/src/backend/program.h
index f948a6b..fd8fd6e 100644
--- a/backend/src/backend/program.h
+++ b/backend/src/backend/program.h
@@ -105,6 +105,7 @@ enum gbe_curbe_type {
   GBE_CURBE_PROFILING_TIMESTAMP2,
   GBE_CURBE_PROFILING_TIMESTAMP3,
   GBE_CURBE_PROFILING_TIMESTAMP4,
+  GBE_CURBE_THREAD_ID,
   GBE_GEN_REG,
 };
 
diff --git a/backend/src/ir/instruction.cpp b/backend/src/ir/instruction.cpp
index 734e66b..9d6483c 100644
--- a/backend/src/ir/instruction.cpp
+++ b/backend/src/ir/instruction.cpp
@@ -1447,7 +1447,7 @@ namespace ir {
         case WORKGROUP_OP_EXCLUSIVE_ADD:
         case WORKGROUP_OP_EXCLUSIVE_MIN:
         case WORKGROUP_OP_EXCLUSIVE_MAX:
-          if (this->srcNum != 1) {
+          if (this->srcNum != 3) {
             whyNot = "Wrong number of source.";
             return false;
           }
diff --git a/backend/src/ir/profile.cpp b/backend/src/ir/profile.cpp
index 75e669d..4e0fc08 100644
--- a/backend/src/ir/profile.cpp
+++ b/backend/src/ir/profile.cpp
@@ -47,7 +47,8 @@ namespace ir {
         "profiling_buffer_pointer",
         "profiling_timestamps0", "profiling_timestamps1",
         "profiling_timestamps2", "profiling_timestamps3",
-        "profiling_timestamps4"
+        "profiling_timestamps4",
+        "threadid"
     };
 
 #if GBE_DEBUG
@@ -96,6 +97,7 @@ namespace ir {
       DECL_NEW_REG(FAMILY_DWORD, profilingts2, 0, GBE_CURBE_PROFILING_TIMESTAMP2);
       DECL_NEW_REG(FAMILY_DWORD, profilingts3, 0, GBE_CURBE_PROFILING_TIMESTAMP3);
       DECL_NEW_REG(FAMILY_DWORD, profilingts4, 0, GBE_CURBE_PROFILING_TIMESTAMP4);
+      DECL_NEW_REG(FAMILY_DWORD, threadid, 1, GBE_CURBE_THREAD_ID);
     }
 #undef DECL_NEW_REG
 
diff --git a/backend/src/ir/profile.hpp b/backend/src/ir/profile.hpp
index e586f44..cc34720 100644
--- a/backend/src/ir/profile.hpp
+++ b/backend/src/ir/profile.hpp
@@ -77,7 +77,8 @@ namespace ir {
     static const Register profilingts2 = Register(33); // timestamp for profiling.
     static const Register profilingts3 = Register(34); // timestamp for profiling.
     static const Register profilingts4 = Register(35); // timestamp for profiling.
-    static const uint32_t regNum = 36;             // number of special registers
+    static const Register threadid = Register(36); // the thread id of this thread.
+    static const uint32_t regNum = 37;             // number of special registers
     extern const char *specialRegMean[];           // special register name.
   } /* namespace ocl */
 
-- 
1.7.9.5