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

/* 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.                                    */

/*                                                                   */

/* 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 <ctype.h></ctype.h>

#include "common.h"

#ifdef FUNCTION_PROFILE

#include "functable.h"

#endif

#ifndef COMPLEX

#ifdef XDOUBLE

#define ERROR_NAME "QSYR2K"

#elif defined(DOUBLE)

#define ERROR_NAME "DSYR2K"

#else

#define ERROR_NAME "SSYR2K"

#endif

#else

#ifndef HEMM

#ifdef XDOUBLE

#define ERROR_NAME "XSYR2K"

#elif defined(DOUBLE)

#define ERROR_NAME "ZSYR2K"

#else

#define ERROR_NAME "CSYR2K"

#endif

#else

#ifdef XDOUBLE

#define ERROR_NAME "XHER2K"

#elif defined(DOUBLE)

#define ERROR_NAME "ZHER2K"

#else

#define ERROR_NAME "CHER2K"

#endif

#endif

#endif

static int (*syr2k[])(blas_arg_t *, BLASLONG *, BLASLONG *, FLOAT *, FLOAT *, BLASLONG) = {

#ifndef HEMM

  SYR2K_UN, SYR2K_UC, SYR2K_LN, SYR2K_LC,

#else

  HER2K_UN, HER2K_UC, HER2K_LN, HER2K_LC,

#endif

};

#ifndef CBLAS

void NAME(char *UPLO, char *TRANS,

         blasint *N, blasint *K, 

         FLOAT *alpha, FLOAT *a, blasint *ldA, 

	               FLOAT *b, blasint *ldB,

         FLOAT *beta,  FLOAT *c, blasint *ldC){

  char uplo_arg  = *UPLO;

  char trans_arg = *TRANS;

  blas_arg_t args;

  FLOAT *buffer;

  FLOAT *sa, *sb;

#ifdef SMP

#ifndef COMPLEX

#ifdef XDOUBLE

  int mode  =  BLAS_XDOUBLE | BLAS_REAL;

#elif defined(DOUBLE)

  int mode  =  BLAS_DOUBLE  | BLAS_REAL;

#else

  int mode  =  BLAS_SINGLE  | BLAS_REAL;

#endif  

#else

#ifdef XDOUBLE

  int mode  =  BLAS_XDOUBLE | BLAS_COMPLEX;

#elif defined(DOUBLE)

  int mode  =  BLAS_DOUBLE  | BLAS_COMPLEX;

#else

  int mode  =  BLAS_SINGLE  | BLAS_COMPLEX;

#endif  

#endif

#endif

  blasint info;

  int uplo;

  int trans;

  int nrowa;

  PRINT_DEBUG_NAME;

  args.n = *N;

  args.k = *K;

  args.a = (void *)a;

  args.b = (void *)b;

  args.c = (void *)c;

  args.lda = *ldA;

  args.ldb = *ldB;

  args.ldc = *ldC;

  args.alpha = (void *)alpha;

  args.beta  = (void *)beta;

  TOUPPER(uplo_arg);

  TOUPPER(trans_arg);

  uplo  = -1;

  trans = -1;

  if (uplo_arg  == 'U') uplo  = 0;

  if (uplo_arg  == 'L') uplo  = 1;

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

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

  if (trans_arg == 'R') trans = 0;

  if (trans_arg == 'C') trans = 1;

  nrowa = args.n;

  if (trans & 1) nrowa = args.k;

  info = 0;

  if (args.ldc < MAX(1,args.n)) info = 12;

  if (args.ldb < MAX(1,nrowa))  info =  9;

  if (args.lda < MAX(1,nrowa))  info =  7;

  if (args.k < 0)               info =  4;

  if (args.n < 0)               info =  3;

  if (trans < 0)                info =  2;

  if (uplo  < 0)                info =  1;

  if (info != 0) {

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

    return;

  }

#else

void CNAME(enum CBLAS_ORDER order, enum CBLAS_UPLO Uplo, enum CBLAS_TRANSPOSE Trans,

	   blasint n, blasint k,

#ifndef COMPLEX

	   FLOAT alpha,

#else

	   FLOAT *alpha,

#endif

	   FLOAT *a, blasint lda,

	   FLOAT *b, blasint ldb,

#if !defined(COMPLEX) || defined(HEMM)

	   FLOAT beta,

#else

	   FLOAT *beta,

#endif

	   FLOAT *c, blasint ldc) {

  blas_arg_t args;

  int uplo, trans;

  blasint info, nrowa;

  FLOAT *buffer;

  FLOAT *sa, *sb;

#ifdef HEMM

  FLOAT CAlpha[2];

#endif

#ifdef SMP

#ifndef COMPLEX

#ifdef XDOUBLE

  int mode  =  BLAS_XDOUBLE | BLAS_REAL;

#elif defined(DOUBLE)

  int mode  =  BLAS_DOUBLE  | BLAS_REAL;

#else

  int mode  =  BLAS_SINGLE  | BLAS_REAL;

#endif  

#else

#ifdef XDOUBLE

  int mode  =  BLAS_XDOUBLE | BLAS_COMPLEX;

#elif defined(DOUBLE)

  int mode  =  BLAS_DOUBLE  | BLAS_COMPLEX;

#else

  int mode  =  BLAS_SINGLE  | BLAS_COMPLEX;

#endif  

#endif

#endif

  PRINT_DEBUG_CNAME;

  args.n = n;

  args.k = k;

  args.a = (void *)a;

  args.b = (void *)b;

  args.c = (void *)c;

  args.lda = lda;

  args.ldb = ldb;

  args.ldc = ldc;

#ifndef COMPLEX

  args.alpha = (void *)α

#else

  args.alpha = (void *)alpha;

#endif

#if !defined(COMPLEX) || defined(HEMM)

  args.beta  = (void *)β

#else

  args.beta  = (void *)beta;

#endif

  trans = -1;

  uplo  = -1;

  info  =  0;

  if (order == CblasColMajor) {

    if (Uplo == CblasUpper) uplo  = 0;

    if (Uplo == CblasLower) uplo  = 1;

    if (Trans == CblasNoTrans)     trans = 0;

#ifndef COMPLEX

    if (Trans == CblasTrans)       trans = 1;

    if (Trans == CblasConjNoTrans) trans = 0;

    if (Trans == CblasConjTrans)   trans = 1;

#elif !defined(HEMM)

    if (Trans == CblasTrans)       trans = 1;

#else

    if (Trans == CblasConjTrans)   trans = 1;

#endif

    info = -1;

    nrowa = args.n;

    if (trans & 1) nrowa = args.k;

    if (args.ldc < MAX(1,args.n)) info = 12;

    if (args.ldb < MAX(1,nrowa))  info =  9;

    if (args.lda < MAX(1,nrowa))  info =  7;

    if (args.k < 0)               info =  4;

    if (args.n < 0)               info =  3;

    if (trans < 0)                info =  2;

    if (uplo  < 0)                info =  1;

  }

  if (order == CblasRowMajor) {

#ifdef HEMM

    CAlpha[0] =  alpha[0];

    CAlpha[1] = -alpha[1];

    args.alpha = (void *)CAlpha;

#endif

    if (Uplo == CblasUpper) uplo  = 1;

    if (Uplo == CblasLower) uplo  = 0;

    if (Trans == CblasNoTrans)     trans = 1;

#ifndef COMPLEX

    if (Trans == CblasTrans)       trans = 0;

    if (Trans == CblasConjNoTrans) trans = 1;

    if (Trans == CblasConjTrans)   trans = 0;

#elif !defined(HEMM)

    if (Trans == CblasTrans)       trans = 0;

#else

    if (Trans == CblasConjTrans)   trans = 0;

#endif

    info = -1;

    nrowa = args.n;

    if (trans & 1) nrowa = args.k;

    if (args.ldc < MAX(1,args.n)) info = 12;

    if (args.ldb < MAX(1,nrowa))  info =  9;

    if (args.lda < MAX(1,nrowa))  info =  7;

    if (args.k < 0)               info =  4;

    if (args.n < 0)               info =  3;

    if (trans < 0)                info =  2;

    if (uplo  < 0)                info =  1;

  }

  if (info >= 0) {

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

    return;

  }

#endif

  if (args.n == 0) return;

  IDEBUG_START;

  FUNCTION_PROFILE_START();

  buffer = (FLOAT *)blas_memory_alloc(0);

  sa = (FLOAT *)((BLASLONG)buffer + GEMM_OFFSET_A);

  sb = (FLOAT *)(((BLASLONG)sa + ((GEMM_P * GEMM_Q * COMPSIZE * SIZE + GEMM_ALIGN) & ~GEMM_ALIGN)) + GEMM_OFFSET_B);

#ifdef SMP

  if (!trans){

    mode |= (BLAS_TRANSA_N | BLAS_TRANSB_T);

  } else {

    mode |= (BLAS_TRANSA_T | BLAS_TRANSB_N);

  }

  mode |= (uplo  << BLAS_UPLO_SHIFT);

  args.common = NULL;

  args.nthreads = num_cpu_avail(3);

  if (args.nthreads == 1) {

#endif

    (syr2k[(uplo << 1) | trans ])(&args, NULL, NULL, sa, sb, 0);

#ifdef SMP

  } else {

    syrk_thread(mode, &args, NULL, NULL, syr2k[(uplo << 1) | trans ], sa, sb, args.nthreads);

  }

#endif

  blas_memory_free(buffer);

  FUNCTION_PROFILE_END(COMPSIZE * COMPSIZE, 2 * args.n * args.k + args.n * args.n, 2 * args.n * args.n * args.k);

  IDEBUG_END;

  return;

}