[Beignet] [PATCH 2/4] replace sqrt with llvm intrinsic.

[xionghu.luo at intel.com]

From: Luo Xionghu <xionghu.luo at intel.com>

translate native sqrt to llvm.sqrt for fast path.

Signed-off-by: Luo Xionghu <xionghu.luo at intel.com>
---
 backend/src/libocl/tmpl/ocl_math.tmpl.cl   | 2 +-
 backend/src/llvm/llvm_gen_backend.cpp      | 3 ---
 backend/src/llvm/llvm_gen_ocl_function.hxx | 1 -
 3 files changed, 1 insertion(+), 5 deletions(-)

diff --git a/backend/src/libocl/tmpl/ocl_math.tmpl.cl b/backend/src/libocl/tmpl/ocl_math.tmpl.cl
index 8f726ff..fc0343c 100644
--- a/backend/src/libocl/tmpl/ocl_math.tmpl.cl
+++ b/backend/src/libocl/tmpl/ocl_math.tmpl.cl
@@ -26,7 +26,7 @@ constant int __ocl_math_fastpath_flag = 1;
 PURE CONST float __gen_ocl_fabs(float x);
 CONST float __gen_ocl_sin(float x) __asm("llvm.sin" ".f32");
 CONST float __gen_ocl_cos(float x) __asm("llvm.cos" ".f32");
-PURE CONST float __gen_ocl_sqrt(float x);
+CONST float __gen_ocl_sqrt(float x) __asm("llvm.sqrt" ".f32");
 PURE CONST float __gen_ocl_rsqrt(float x);
 PURE CONST float __gen_ocl_log(float x);
 PURE CONST float __gen_ocl_exp(float x);
diff --git a/backend/src/llvm/llvm_gen_backend.cpp b/backend/src/llvm/llvm_gen_backend.cpp
index 34c571e..06a9a1b 100644
--- a/backend/src/llvm/llvm_gen_backend.cpp
+++ b/backend/src/llvm/llvm_gen_backend.cpp
@@ -2854,8 +2854,6 @@ error:
       case GEN_OCL_FBH:
       case GEN_OCL_FBL:
       case GEN_OCL_CBIT:
-      case GEN_OCL_SQR:
-      case GEN_OCL_RSQ:
       case GEN_OCL_LOG:
       case GEN_OCL_EXP:
       case GEN_OCL_POW:
@@ -3344,7 +3342,6 @@ error:
           }
           case GEN_OCL_LOG: this->emitUnaryCallInst(I,CS,ir::OP_LOG); break;
           case GEN_OCL_EXP: this->emitUnaryCallInst(I,CS,ir::OP_EXP); break;
-          case GEN_OCL_SQR: this->emitUnaryCallInst(I,CS,ir::OP_SQR); break;
           case GEN_OCL_RSQ: this->emitUnaryCallInst(I,CS,ir::OP_RSQ); break;
           case GEN_OCL_RCP: this->emitUnaryCallInst(I,CS,ir::OP_RCP); break;
           case GEN_OCL_FABS: this->emitUnaryCallInst(I,CS,ir::OP_ABS); break;
diff --git a/backend/src/llvm/llvm_gen_ocl_function.hxx b/backend/src/llvm/llvm_gen_ocl_function.hxx
index 0ae7ec2..ae14d9f 100644
--- a/backend/src/llvm/llvm_gen_ocl_function.hxx
+++ b/backend/src/llvm/llvm_gen_ocl_function.hxx
@@ -20,7 +20,6 @@ DECL_LLVM_GEN_FUNCTION(GET_WORK_DIM, __gen_ocl_get_work_dim)
 
 // Math function
 DECL_LLVM_GEN_FUNCTION(FABS, __gen_ocl_fabs)
-DECL_LLVM_GEN_FUNCTION(SQR, __gen_ocl_sqrt)
 DECL_LLVM_GEN_FUNCTION(RSQ, __gen_ocl_rsqrt)
 DECL_LLVM_GEN_FUNCTION(LOG, __gen_ocl_log)
 DECL_LLVM_GEN_FUNCTION(EXP, __gen_ocl_exp)
-- 
1.9.1