[Beignet] [PATCH 7/7] Backend: for BDW and after, According to BSpec no need to split CMP when src is DW DF

[rander]

Signed-off-by: rander <rander.wang at intel.com>
---
 backend/src/backend/gen8_encoder.cpp | 5 +++++
 backend/src/backend/gen_encoder.cpp  | 4 ++++
 backend/src/backend/gen_encoder.hpp  | 1 +
 3 files changed, 10 insertions(+)

diff --git a/backend/src/backend/gen8_encoder.cpp b/backend/src/backend/gen8_encoder.cpp
index a33fbac..cbee83f 100644
--- a/backend/src/backend/gen8_encoder.cpp
+++ b/backend/src/backend/gen8_encoder.cpp
@@ -883,4 +883,9 @@ namespace gbe
                    msg_length,
                    response_length);
    }
+
+    /* for BDW and after, no need to split CMP when src is DW*/
+    bool Gen8Encoder::needToSplitCmpBySrcType(GenEncoder *p, GenRegister src0, GenRegister src1) {
+      return false;
+    }
 } /* End of the name space. */
diff --git a/backend/src/backend/gen_encoder.cpp b/backend/src/backend/gen_encoder.cpp
index 03ce0e2..217a2d8 100644
--- a/backend/src/backend/gen_encoder.cpp
+++ b/backend/src/backend/gen_encoder.cpp
@@ -192,6 +192,10 @@ namespace gbe
     if (isSrcDstDiffSpan(dst, src0) == true) return true;
     if (isSrcDstDiffSpan(dst, src1) == true) return true;
 
+    return p->needToSplitCmpBySrcType(p, src0, src1);
+  }
+
+  bool GenEncoder::needToSplitCmpBySrcType(GenEncoder *p, GenRegister src0, GenRegister src1) {
     if (src0.type == GEN_TYPE_D || src0.type == GEN_TYPE_UD || src0.type == GEN_TYPE_F)
       return true;
     if (src1.type == GEN_TYPE_D || src1.type == GEN_TYPE_UD || src1.type == GEN_TYPE_F)
diff --git a/backend/src/backend/gen_encoder.hpp b/backend/src/backend/gen_encoder.hpp
index 3e45c81..040b94a 100644
--- a/backend/src/backend/gen_encoder.hpp
+++ b/backend/src/backend/gen_encoder.hpp
@@ -162,6 +162,7 @@ namespace gbe
     void BRD(GenRegister src);
     /*! Compare instructions */
     void CMP(uint32_t conditional, GenRegister src0, GenRegister src1, GenRegister dst = GenRegister::null());
+    virtual bool needToSplitCmpBySrcType(GenEncoder *p, GenRegister src0, GenRegister src1);
     /*! Select with embedded compare (like sel.le ...) */
     void SEL_CMP(uint32_t conditional, GenRegister dst, GenRegister src0, GenRegister src1);
     /*! EOT is used to finish GPGPU threads */
-- 
2.7.4