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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 Xtrmv class (see the header for information about the class).
//
// =================================================================================================
#include "internal/routines/level2/xtrmv.h"
#include <string>
#include <vector>
namespace clblast {
// =================================================================================================
// Constructor: forwards to base class constructor
template <typename T>
Xtrmv<T>::Xtrmv(Queue &queue, EventPointer event, const std::string &name):
Xgemv<T>(queue, event, name) {
}
// =================================================================================================
// The main routine
template <typename T>
StatusCode Xtrmv<T>::DoTrmv(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) {
// Creates a copy of X: a temporary scratch buffer
auto scratch_buffer = Buffer<T>(context_, n*x_inc + x_offset);
try {
x_buffer.CopyTo(queue_, n*x_inc + x_offset, scratch_buffer);
} catch (...) { } // Continues: error-code is returned in MatVec
// The data is either in the upper or lower triangle
size_t is_upper = ((triangle == Triangle::kUpper && layout != Layout::kRowMajor) ||
(triangle == Triangle::kLower && layout == Layout::kRowMajor));
// Adds '2' to the parameter if the diagonal is unit
auto parameter = (diagonal == Diagonal::kUnit) ? is_upper + 2 : is_upper;
// Runs the generic matrix-vector multiplication, disabling the use of fast vectorized kernels.
// The specific triangular matrix-accesses are implemented in the kernel guarded by the
// ROUTINE_TRMV define.
auto fast_kernels = false;
auto status = MatVec(layout, a_transpose,
n, n, static_cast<T>(1),
a_buffer, a_offset, a_ld,
scratch_buffer, x_offset, x_inc, static_cast<T>(0),
x_buffer, x_offset, x_inc,
fast_kernels, fast_kernels,
parameter, false, 0, 0);
// Returns the proper error code (renames vector Y to X)
switch(status) {
case StatusCode::kInvalidVectorY: return StatusCode::kInvalidVectorX;
case StatusCode::kInvalidIncrementY: return StatusCode::kInvalidIncrementX;
case StatusCode::kInsufficientMemoryY: return StatusCode::kInsufficientMemoryX;
default: return status;
}
}
// =================================================================================================
// Compiles the templated class
template class Xtrmv<half>;
template class Xtrmv<float>;
template class Xtrmv<double>;
template class Xtrmv<float2>;
template class Xtrmv<double2>;
// =================================================================================================
} // namespace clblast
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