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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 Xtrsv routine. It uses a block-algorithm and performs small triangular
// forward and backward substitutions on the diagonal parts of the matrix in combination with larger
// GEMV computation on the remainder of the matrix.
//
// =================================================================================================
#ifndef CLBLAST_ROUTINES_XTRSV_H_
#define CLBLAST_ROUTINES_XTRSV_H_
#include "routines/level2/xgemv.hpp"
namespace clblast {
// =================================================================================================
// See comment at top of file for a description of the class
template <typename T>
class Xtrsv: public Xgemv<T> {
public:
// Uses the generic matrix-vector routine
using Xgemv<T>::queue_;
using Xgemv<T>::context_;
using Xgemv<T>::device_;
using Xgemv<T>::db_;
using Xgemv<T>::program_;
using Xgemv<T>::DoGemv;
// Constructor
Xtrsv(Queue &queue, EventPointer event, const std::string &name = "TRSV");
// Templated-precision implementation of the routine
void DoTrsv(const Layout layout, const Triangle triangle,
const Transpose a_transpose, const Diagonal diagonal,
const size_t n,
const Buffer<T> &a_buffer, const size_t a_offset, const size_t a_ld,
const Buffer<T> &x_buffer, const size_t x_offset, const size_t x_inc);
// Performs forward or backward substitution on a small triangular matrix
void Substitution(const Layout layout, const Triangle triangle,
const Transpose a_transpose, const Diagonal diagonal,
const size_t n,
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_inc,
const Buffer<T> &x_buffer, const size_t offset_x, const size_t x_inc,
EventPointer event);
};
// =================================================================================================
} // namespace clblast
// CLBLAST_ROUTINES_XTRSV_H_
#endif
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