Naive implement cblas

Author: reyoung

paddle/fluid/operators/math/blas_impl.h

@@ -24,17 +24,23 @@ struct CBlas;
 
 template <>
 struct CBlas<float> {
-  static constexpr auto GEMM = cblas_sgemm;
+  template <typename... ARGS>
+  static void GEMM(ARGS... args) {
+    cblas_sgemm(args...);
+  }
 };
 
 template <>
 struct CBlas<double> {
-  static constexpr auto GEMM = cblas_dgemm;
+  template <typename... ARGS>
+  static void GEMM(ARGS... args) {
+    cblas_dgemm(args...);
+  }
 };
 
 template <>
 struct CBlas<platform::float16> {
-  void GEMM(...) { PADDLE_THROW("float16 GEMM not supported on CPU"); }
+  static void GEMM(...) { PADDLE_THROW("float16 GEMM not supported on CPU"); }
 };
 
 template <>