

#ifndef __GMS_ZGEMV_H__
#define __GMS_ZGEMV_H__

//=========================================================================
// Modified and optimized version of OpenBLAS zgemv and kernels zgemv_4
// Programmer: Bernard Gingold, contact: beniekg@gmail.com
// 07-02-2021 10:06 AM +00200
// Original copyright below
//========================================================================
/***************************************************************************
Copyright (c) 2014, The OpenBLAS Project
All rights reserved.
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modification, are permitted provided that the following conditions are
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2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
3. Neither the name of the OpenBLAS project nor the names of
its contributors may be used to endorse or promote products
derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBLAS PROJECT OR CONTRIBUTORS BE
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*****************************************************************************/

#include <cstdint>
#include "GMS_config" // must define 'CONJ'

// This is important macro definition
// Set this to '1' in order to enable simd reduction in zgemv_function
// Vectorized reduction may cause (probably) performance reduction
// because of irregular stride advancing.
#if !defined(GMS_ZGEMV_EXPLICITLY_VECTORIZE)
#define GMS_ZGEMV_EXPLICITLY_VECTORIZE 0
#endif

// Kernels

#if !defined(ZGEMV_KERNEL_USE_PREFETCHT0)
    #define ZGEMV_KERNEL_USE_PREFETCHT0 1
#endif

__ATTR_HOT__
__ATTR_ALIGN__(32) // default alignment on boundary of 32-bytes (should be tested against ICC or GCC alignment logic)
void zgemv_kernel_4x4(int32_t n,
                      double **__restrict ap,
		      double * __restrict x,
		      double * __restrict y);
         


__ATTR_HOT__
__ATTR_ALIGN__(32) // default alignment on boundary of 32-bytes (should be tested against ICC or GCC alignment logic)
void zgemv_kernel_4x2(const int32_t n,
                      double ** __restrict ap,
		      double *  __restrict x,
		      double *  __restrict y); 

__ATTR_HOT__
__ATTR_ALIGN__(32) // default alignment on boundary of 32-bytes (should be tested against ICC or GCC alignment logic)
void zgemv_kernel_4x1(const int32_t n,
                      double * __restrict ap,
		      double * __restrict x,
		      double * __restrict y); 
		      
__ATTR_HOT__
__ATTR_ALIGN__(32) // default alignment on boundary of 32-bytes (should be tested against ICC or GCC alignment logic)
void add_y(const int32_t n,
           double * __restrict src,
	   double * __restrict dest,
	   const int32_t inc_dest,
	   const double alpha_r,
	   const double alpha_i); 
	   
	   


#define ZGEMV_NBMAX 1024

__ATTR_HOT__
__ATTR_ALIGN__(32) // default alignment on boundary of 32-bytes (should be tested against ICC or GCC alignment logic)
void zgemv(const int32_t m,
           const int32_t n,
	   const double alpha_r,
	   const double alpha_i,
	   double * __restrict a,
	   const int32_t lda,
	   double * __restrict x,
	   const int32_t inc_x,
	   double * __restrict y,
	   const int32_t inc_y,
	   double * buffer); 






#endif /*__GMS_ZGEMV_H__*/
