/*********************************************************************/

/* Copyright 2009, 2010 The University of Texas at Austin.           */

/* All rights reserved.                                              */

/*                                                                   */

/* Redistribution and use in source and binary forms, with or        */

/* without modification, are permitted provided that the following   */

/* conditions are met:                                               */

/*                                                                   */

/*   1. Redistributions of source code must retain the above         */

/*      copyright notice, this list of conditions and the following  */

/*      disclaimer.                                                  */

/*                                                                   */

/*   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.                              */

/*                                                                   */

/*    THIS  SOFTWARE IS PROVIDED  BY THE  UNIVERSITY OF  TEXAS AT    */

/*    AUSTIN  ``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 UNIVERSITY  OF TEXAS AT    */

/*    AUSTIN OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,    */

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/* documentation are those of the authors and should not be          */

/* interpreted as representing official policies, either expressed   */

/* or implied, of The University of Texas at Austin.                 */

/*********************************************************************/

#include <stdio.h></stdio.h>

#include "common.h"

#ifdef FUNCTION_PROFILE

#include "functable.h"

#endif

#ifdef XDOUBLE

#define ERROR_NAME "XGEMV "

#elif defined(DOUBLE)

#define ERROR_NAME "ZGEMV "

#else

#define ERROR_NAME "CGEMV "

#endif

#ifdef SMP

static int (*gemv_thread[])(BLASLONG, BLASLONG, FLOAT *, FLOAT *, BLASLONG,  FLOAT * , BLASLONG, FLOAT *, BLASLONG, FLOAT *, int) = {

#ifdef XDOUBLE

  xgemv_thread_n, xgemv_thread_t, xgemv_thread_r, xgemv_thread_c, xgemv_thread_o, xgemv_thread_u, xgemv_thread_s, xgemv_thread_d, 

#elif defined DOUBLE

  zgemv_thread_n, zgemv_thread_t, zgemv_thread_r, zgemv_thread_c, zgemv_thread_o, zgemv_thread_u, zgemv_thread_s, zgemv_thread_d, 

#else

  cgemv_thread_n, cgemv_thread_t, cgemv_thread_r, cgemv_thread_c, cgemv_thread_o, cgemv_thread_u, cgemv_thread_s, cgemv_thread_d, 

#endif

};

#endif

#ifndef CBLAS

void NAME(char *TRANS, blasint *M, blasint *N,

	 FLOAT *ALPHA, FLOAT *a, blasint *LDA,

	 FLOAT *x, blasint *INCX,

	 FLOAT *BETA,  FLOAT *y, blasint *INCY){

  char trans = *TRANS;

  blasint m = *M;

  blasint n = *N;

  blasint lda = *LDA;

  blasint incx = *INCX;

  blasint incy = *INCY;

  FLOAT *buffer;

#ifdef SMP

  int nthreads;

#endif

  int (*gemv[])(BLASLONG, BLASLONG, BLASLONG, FLOAT, FLOAT, FLOAT *, BLASLONG,

		FLOAT * , BLASLONG, FLOAT *, BLASLONG, FLOAT *) = {

		  GEMV_N, GEMV_T, GEMV_R, GEMV_C,

		  GEMV_O, GEMV_U, GEMV_S, GEMV_D,

		};

  blasint    info;

  blasint    lenx, leny;

  blasint    i;

  PRINT_DEBUG_NAME;

  FLOAT alpha_r = *(ALPHA + 0);

  FLOAT alpha_i = *(ALPHA + 1);

  FLOAT beta_r  = *(BETA + 0);

  FLOAT beta_i  = *(BETA + 1);

  TOUPPER(trans);

  info = 0;

  i    = -1;

  if (trans == 'N')  i = 0;

  if (trans == 'T')  i = 1;

  if (trans == 'R')  i = 2;

  if (trans == 'C')  i = 3;

  if (trans == 'O')  i = 4;

  if (trans == 'U')  i = 5;

  if (trans == 'S')  i = 6;

  if (trans == 'D')  i = 7;

  if (incy == 0)      info = 11;

  if (incx == 0)      info = 8;

  if (lda < MAX(1,m)) info = 6;

  if (n < 0) 	      info = 3;

  if (m < 0) 	      info = 2;

  if (i < 0)          info = 1;

  trans = i;

  if (info != 0) {

    BLASFUNC(xerbla)(ERROR_NAME, &info, sizeof(ERROR_NAME));

    return;

  }

#else

void CNAME(enum CBLAS_ORDER order,

	   enum CBLAS_TRANSPOSE TransA,

	   blasint m, blasint n,

	   FLOAT *ALPHA,

	   FLOAT  *a, blasint lda,

	   FLOAT  *x, blasint incx,

	   FLOAT *BETA,

	   FLOAT  *y, blasint incy){

  FLOAT *buffer;

  blasint    lenx, leny;

  int trans;

  blasint info, t;

#ifdef SMP

  int nthreads;

#endif

  int (*gemv[])(BLASLONG, BLASLONG, BLASLONG, FLOAT, FLOAT, FLOAT *, BLASLONG,

	    FLOAT * , BLASLONG, FLOAT *, BLASLONG, FLOAT *) = {

	      GEMV_N, GEMV_T, GEMV_R, GEMV_C,

	      GEMV_O, GEMV_U, GEMV_S, GEMV_D,

	    };

  PRINT_DEBUG_CNAME;

  FLOAT alpha_r = *(ALPHA + 0);

  FLOAT alpha_i = *(ALPHA + 1);

  FLOAT beta_r  = *(BETA + 0);

  FLOAT beta_i  = *(BETA + 1);

  trans = -1;

  info  =  0;

  if (order == CblasColMajor) {

    if (TransA == CblasNoTrans)     trans = 0;

    if (TransA == CblasTrans)       trans = 1;

    if (TransA == CblasConjNoTrans) trans = 2;

    if (TransA == CblasConjTrans)   trans = 3;

    info = -1;

    if (incy == 0)	  info = 11;

    if (incx == 0)	  info = 8;

    if (lda < MAX(1, m))  info = 6;

    if (n < 0)		  info = 3;

    if (m < 0)		  info = 2;

    if (trans < 0)        info = 1;

  }

  if (order == CblasRowMajor) {

    if (TransA == CblasNoTrans)     trans = 1;

    if (TransA == CblasTrans)       trans = 0;

    if (TransA == CblasConjNoTrans) trans = 3;

    if (TransA == CblasConjTrans)   trans = 2;

    info = -1;

    t = n;

    n = m;

    m = t;

    if (incy == 0)	  info = 11;

    if (incx == 0)	  info = 8;

    if (lda < MAX(1, m))  info = 6;

    if (n < 0)		  info = 3;

    if (m < 0)		  info = 2;

    if (trans < 0)        info = 1;

  }

  if (info >= 0) {

    BLASFUNC(xerbla)(ERROR_NAME, &info, sizeof(ERROR_NAME));

    return;

  }

#endif

  /*  Quick return if possible. */

  if (m == 0 || n == 0) return;

  lenx = n;

  leny = m;

  if (trans & 1) lenx = m;

  if (trans & 1) leny = n;

  if (beta_r != ONE || beta_i != ZERO) SCAL_K(leny, 0, 0, beta_r, beta_i, y, abs(incy), NULL, 0, NULL, 0);

  if (alpha_r == ZERO && alpha_i == ZERO) return;

  IDEBUG_START;

  FUNCTION_PROFILE_START();

  if (incx < 0) x -= (lenx - 1) * incx * 2;

  if (incy < 0) y -= (leny - 1) * incy * 2;

  buffer = (FLOAT *)blas_memory_alloc(1);

#ifdef SMP

  nthreads = num_cpu_avail(2);

  if (nthreads == 1) {

#endif

    (gemv[(int)trans])(m, n, 0, alpha_r, alpha_i, a, lda, x, incx, y, incy, buffer);

#ifdef SMP

  } else {

    (gemv_thread[(int)trans])(m, n, ALPHA, a, lda, x, incx, y, incy, buffer, nthreads);

  }

#endif

  blas_memory_free(buffer);

  FUNCTION_PROFILE_END(4, m * n + m + n,  2 * m * n);

  IDEBUG_END;

  return;

}