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

/* 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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/*    POSSIBILITY OF SUCH DAMAGE.                                    */

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/* The views and conclusions contained in the software and           */

/* 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

#ifndef CONJ

#define ERROR_NAME "XGERU  "

#else

#define ERROR_NAME "XGERC  "

#endif

#elif defined DOUBLE

#ifndef CONJ

#define ERROR_NAME "ZGERU  "

#else

#define ERROR_NAME "ZGERC  "

#endif

#else

#ifndef CONJ

#define ERROR_NAME "CGERU  "

#else

#define ERROR_NAME "CGERC "

#endif

#endif

#if   defined XDOUBLE

#ifndef CONJ

#define GER		GERU_K

#define GER_THREAD	xger_thread_U

#else

#define GER		GERC_K

#define GER_THREAD	xger_thread_C

#define GERV		GERV_K

#define GERV_THREAD	xger_thread_V

#endif

#elif defined DOUBLE

#ifndef CONJ

#define GER		GERU_K

#define GER_THREAD	zger_thread_U

#else

#define GER		GERC_K

#define GER_THREAD	zger_thread_C

#define GERV		GERV_K

#define GERV_THREAD	zger_thread_V

#endif

#else

#ifndef CONJ

#define GER		GERU_K

#define GER_THREAD	cger_thread_U

#else

#define GER		GERC_K

#define GER_THREAD	cger_thread_C

#define GERV		GERV_K

#define GERV_THREAD	cger_thread_V

#endif

#endif

#ifndef CBLAS

void NAME(blasint *M, blasint *N, FLOAT *Alpha,

	  FLOAT *x, blasint *INCX,

	  FLOAT *y, blasint *INCY,

	  FLOAT *a, blasint *LDA){

  blasint    m     = *M;

  blasint    n     = *N;

  FLOAT  alpha_r = Alpha[0];

  FLOAT  alpha_i = Alpha[1];

  blasint    incx  = *INCX;

  blasint    incy  = *INCY;

  blasint    lda   = *LDA;

  FLOAT *buffer;

#ifdef SMP

  int nthreads;

#endif

  blasint info;

  PRINT_DEBUG_NAME;

  info = 0;

  if (lda < MAX(1,m)) info = 9;

  if (incy == 0)      info = 7;

  if (incx == 0)      info = 5;

  if (n < 0)          info = 2;

  if (m < 0)          info = 1;

  if (info){

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

    return;

  }

#else

void CNAME(enum CBLAS_ORDER order,

	   blasint m, blasint n,

	   FLOAT *Alpha,

	   FLOAT  *x, blasint incx,

	   FLOAT  *y, blasint incy,

	   FLOAT  *a, blasint lda) {

  FLOAT  alpha_r = Alpha[0];

  FLOAT  alpha_i = Alpha[1];

  FLOAT *buffer;

  blasint info, t;

#ifdef SMP

  int nthreads;

#endif

  PRINT_DEBUG_CNAME;

  info  =  0;

  if (order == CblasColMajor) {

    info = -1;

    if (lda < MAX(1,m)) info = 9;

    if (incy == 0)      info = 7;

    if (incx == 0)      info = 5;

    if (n < 0)          info = 2;

    if (m < 0)          info = 1;

  }

  if (order == CblasRowMajor) {

    info = -1;

    t = n;

    n = m;

    m = t;

    t    = incx;

    incx = incy;

    incy = t;

    buffer = x;

    x = y;

    y = buffer;

    if (lda < MAX(1,m)) info = 9;

    if (incy == 0)      info = 7;

    if (incx == 0)      info = 5;

    if (n < 0)          info = 2;

    if (m < 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;

  if ((alpha_r == 0.) && (alpha_i == 0.)) return;

  IDEBUG_START;

  FUNCTION_PROFILE_START();

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

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

  buffer = (FLOAT *)blas_memory_alloc(1);

#ifdef SMP

  nthreads = num_cpu_avail(2);

  if (nthreads == 1) {

#endif

#if !defined(CBLAS) || !defined(CONJ)

  GER(m, n, 0, alpha_r, alpha_i, x, incx, y, incy, a, lda, buffer);

#else

  if (order == CblasColMajor) {

    GER(m, n, 0, alpha_r, alpha_i, x, incx, y, incy, a, lda, buffer);

  } else {

    GERV(m, n, 0, alpha_r, alpha_i, x, incx, y, incy, a, lda, buffer);

  }

#endif

#ifdef SMP

  } else {

#if !defined(CBLAS) || !defined(CONJ)

      GER_THREAD(m, n, Alpha, x, incx, y, incy, a, lda, buffer, nthreads);

#else

      if (order == CblasColMajor) {

	GER_THREAD(m, n, Alpha, x, incx, y, incy, a, lda, buffer, nthreads);

      } else {

	GERV_THREAD(m, n, Alpha, x, incx, y, incy, a, lda, buffer, nthreads);

      }

#endif

  }

#endif

  blas_memory_free(buffer);

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

  IDEBUG_END;

  return;

}