text: /*****************************************************************************
  
          PhaseHalfPiSse.h
          Author: Laurent de Soras, 2005
  
  From the input signal, generates two signals with a pi/2 phase shift, using
  SSE instruction set.
  
  This object must be aligned on a 16-byte boundary!
  
  If the number of coefficients is 2 or 3 modulo 4, the output is delayed from
  1 sample, compared to the theoretical formula (or FPU implementation).
  
  Template parameters:
  	- NC: number of coefficients, > 0
  
  --- Legal stuff ---
  
  This program is free software. It comes without any warranty, to
  the extent permitted by applicable law. You can redistribute it
  and/or modify it under the terms of the Do What The Fuck You Want
  To Public License, Version 2, as published by Sam Hocevar. See
  http://sam.zoy.org/wtfpl/COPYING for more details.
  
  *Tab=3***********************************************************************/
  
  
  
  #if ! defined (hiir_PhaseHalfPiSse_HEADER_INCLUDED)
  #define hiir_PhaseHalfPiSse_HEADER_INCLUDED
  
  #if defined (_MSC_VER)
  	#pragma once
  	#pragma warning (4 : 4250) // "Inherits via dominance."
  #endif
  
  
  
  /*\\\ INCLUDE FILES \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
  
  #include "./def.h"
  #include "./StageDataSse.h"
  
  #include <xmmintrin.h>
  
  #include <array>
  
  
  
  namespace hiir
  {
  
  
  
  template <int NC>
  class PhaseHalfPiSse
  {
  
  	static_assert ((NC > 0), "Number of coefficient must be positive.");
  
  /*\\\ PUBLIC \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
  
  public:
  
  	typedef float DataType;
  	static const int  _nbr_chn = 1;
  
  	enum {         NBR_COEFS = NC };
  
  	               PhaseHalfPiSse ();
  	               PhaseHalfPiSse (const PhaseHalfPiSse <NC> &other) = default;
  	               PhaseHalfPiSse (PhaseHalfPiSse <NC> &&other)      = default;
  	               ~PhaseHalfPiSse ()                                = default;
  
  	PhaseHalfPiSse <NC> &
  	               operator = (const PhaseHalfPiSse <NC> &other)     = default;
  	PhaseHalfPiSse <NC> &
  	               operator = (PhaseHalfPiSse <NC> &&other)          = default;
  
  	void           set_coefs (const double coef_arr []);
  
  	hiir_FORCEINLINE void
  	               process_sample (float &out_0, float &out_1, float input);
  	void           process_block (float out_0_ptr [], float out_1_ptr [], const float in_ptr [], long nbr_spl);
  
  	void           clear_buffers ();
  
  
  
  /*\\\ PROTECTED \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
  
  protected:
  
  
  
  /*\\\ PRIVATE \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
  
  private:
  
  	enum {         STAGE_WIDTH = 4 };
  	enum {         NBR_STAGES  = (NBR_COEFS + STAGE_WIDTH-1) / STAGE_WIDTH };
  	enum {         NBR_PHASES  = 2 };
  
  	typedef std::array <StageDataSse, NBR_STAGES + 1> Filter;   // Stage 0 contains only input memory
     typedef std::array <Filter, NBR_PHASES> FilterBiPhase;
  
  	FilterBiPhase  _filter; // Should be the first member (thus easier to align)
  	float          _prev;
  	int            _phase;  // 0 or 1
  
  
  
  /*\\\ FORBIDDEN MEMBER FUNCTIONS \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
  
  private:
  
  	bool           operator == (const PhaseHalfPiSse <NC> &other) = delete;
  	bool           operator != (const PhaseHalfPiSse <NC> &other) = delete;
  
  }; // class PhaseHalfPiSse
  
  
  
  }  // namespace hiir
  
  
  
  #include "./PhaseHalfPiSse.hpp"
  
  
  
  #endif   // hiir_PhaseHalfPiSse_HEADER_INCLUDED
  
  
  
  /*\\\ EOF \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
  