GPU Calc: Optimized ASIN

AMLOEXT-269

Change-Id: I10d33b50f743630ed91daa743017e431754e5659
Signed-off-by: haochen <haochen@multicorewareinc.com>
Signed-off-by: Wei Wei <weiwei@multicorewareinc.com>
Signed-off-by: I-Jui (Ray) Sung <ray@multicorewareinc.com>

sc/source/core/opencl/op_math.cxx

@@ -1325,6 +1325,12 @@ void OpArcCotHyp::GenSlidingWindowFunction(std::stringstream &ss,
      ss << "    return 0.5 * log(1 + 2 * pown(arg0 - 1.0, -1));\n";
      ss << "}";
 }
+void OpArcSin::BinInlineFun(std::set<std::string>& decls,
+    std::set<std::string>& funs)
+{
+    decls.insert(atan2Decl);
+    funs.insert(atan2Content);
+}
 void OpArcSin::GenSlidingWindowFunction(std::stringstream &ss,
     const std::string sSymName, SubArguments &vSubArguments)
 {
@@ -1349,7 +1355,7 @@ void OpArcSin::GenSlidingWindowFunction(std::stringstream &ss,
     ss << "    else \n    ";
 #endif
     ss << "    tmp = " << vSubArguments[0]->GenSlidingWindowDeclRef() << ";\n";
-    ss << "    return asin(tmp);\n";
+    ss << "    return arctan2(tmp, sqrt(1.0 - pow(tmp, 2)));\n";
     ss << "}";
 }
 void OpArcSinHyp::GenSlidingWindowFunction(std::stringstream &ss,

sc/source/core/opencl/op_math.hxx

@@ -153,6 +153,7 @@ public:
         const std::string sSymName, SubArguments &vSubArguments);
     virtual std::string GetBottom(void) { return "0.0"; }
     virtual std::string BinFuncName(void) const { return "ScASin"; }
+    virtual void BinInlineFun(std::set<std::string>& ,std::set<std::string>&);
 };
 class OpArcSinHyp:public Normal{
 public: