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diff --git a/src/routines/level3/xtrmm.hpp b/src/routines/level3/xtrmm.hpp
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+
+// =================================================================================================
+// This file is part of the CLBlast project. The project is licensed under Apache Version 2.0. This
+// project loosely follows the Google C++ styleguide and uses a tab-size of two spaces and a max-
+// width of 100 characters per line.
+//
+// Author(s):
+//   Cedric Nugteren <www.cedricnugteren.nl>
+//
+// This file implements the Xtrmm routine. The implementation is based on first transforming the
+// upper/lower unit/non-unit triangular matrix into a regular matrix and then calling the GEMM
+// routine. Therefore, this class inherits from the Xgemm class.
+//
+// =================================================================================================
+
+#ifndef CLBLAST_ROUTINES_XTRMM_H_
+#define CLBLAST_ROUTINES_XTRMM_H_
+
+#include "routines/level3/xgemm.hpp"
+
+namespace clblast {
+// =================================================================================================
+
+// See comment at top of file for a description of the class
+template <typename T>
+class Xtrmm: public Xgemm<T> {
+ public:
+
+  // Uses methods and variables the regular Xgemm routine
+  using Xgemm<T>::precision_;
+  using Xgemm<T>::routine_name_;
+  using Xgemm<T>::queue_;
+  using Xgemm<T>::context_;
+  using Xgemm<T>::device_;
+  using Xgemm<T>::db_;
+  using Xgemm<T>::DoGemm;
+
+  // Constructor
+  Xtrmm(Queue &queue, EventPointer event, const std::string &name = "TRMM");
+
+  // Templated-precision implementation of the routine
+  StatusCode DoTrmm(const Layout layout, const Side side, const Triangle triangle,
+                    const Transpose a_transpose, const Diagonal diagonal,
+                    const size_t m, const size_t n,
+                    const T alpha,
+                    const Buffer<T> &a_buffer, const size_t a_offset, const size_t a_ld,
+                    const Buffer<T> &b_buffer, const size_t b_offset, const size_t b_ld);
+};
+
+// =================================================================================================
+} // namespace clblast
+
+// CLBLAST_ROUTINES_XTRMM_H_
+#endif