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

/* 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:                                               */

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/*   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 "XTRTRI"

#elif defined(DOUBLE)

#define ERROR_NAME "ZTRTRI"

#else

#define ERROR_NAME "CTRTRI"

#endif

static blasint (*trtri_single[])(blas_arg_t *, BLASLONG *, BLASLONG *, FLOAT *, FLOAT *, BLASLONG) ={

  TRTRI_UU_SINGLE, TRTRI_UN_SINGLE, TRTRI_LU_SINGLE, TRTRI_LN_SINGLE,

};

#ifdef SMP

static blasint (*trtri_parallel[])(blas_arg_t *, BLASLONG *, BLASLONG *, FLOAT *, FLOAT *, BLASLONG) ={

  TRTRI_UU_PARALLEL, TRTRI_UN_PARALLEL, TRTRI_LU_PARALLEL, TRTRI_LN_PARALLEL,

};

#endif

int NAME(char *UPLO, char *DIAG, blasint *N, FLOAT *a, blasint *ldA, blasint *Info){

  blas_arg_t args;

  blasint uplo_arg = *UPLO;

  blasint diag_arg = *DIAG;

  blasint uplo, diag;

  blasint info;

  FLOAT *buffer;

#ifdef PPC440

  extern

#endif

  FLOAT *sa, *sb;

  PRINT_DEBUG_NAME;

  args.n    = *N;

  args.a    = (void *)a;

  args.lda  = *ldA;

  TOUPPER(uplo_arg);

  TOUPPER(diag_arg);

  uplo = -1;

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

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

  diag = -1;

  if (diag_arg == 'U') diag = 0;

  if (diag_arg == 'N') diag = 1;

  info  = 0;

  if (args.lda  < MAX(1,args.n)) info = 5;

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

  if (diag < 0)                  info = 2;

  if (uplo < 0)                  info = 1;

  if (info) {

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

    *Info = - info;

    return 0;

  }

  *Info = 0;

  if (args.n == 0) return 0;

  if (diag) {

    if (AMIN_K(args.n, args.a, args.lda + 1) == ZERO) {

      *Info = IAMIN_K(args.n, args.a, args.lda + 1);

      return 0;

    }

  }

  IDEBUG_START;

  FUNCTION_PROFILE_START();

#ifndef PPC440

  buffer = (FLOAT *)blas_memory_alloc(1);

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

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

#endif

#ifdef SMP

  args.common = NULL;

  args.nthreads = num_cpu_avail(4);

  if (args.nthreads == 1) {

#endif

    *Info = (trtri_single[(uplo << 1) | diag])(&args, NULL, NULL, sa, sb, 0);

#ifdef SMP

  } else {

    *Info = (trtri_parallel[(uplo << 1) | diag])(&args, NULL, NULL, sa, sb, 0);

  }

#endif

#ifndef PPC440

  blas_memory_free(buffer);

#endif

  FUNCTION_PROFILE_END(1, .5 * args.n * args.n,

		          2. * args.n * (1./3. + args.n * ( 1./2. + args.n * 1./6.))

		       +  6. * args.n * (1./3. + args.n * (-1./2. + args.n * 1./6.)));

  IDEBUG_END;

  return 0;

}