text: /*
  
     BLIS    
     An object-based framework for developing high-performance BLAS-like
     libraries.
  
     Copyright (C) 2014, The University of Texas at Austin
  
     Redistribution and use in source and binary forms, with or without
     modification, are permitted provided that the following conditions are
     met:
      - Redistributions of source code must retain the above copyright
        notice, this list of conditions and the following disclaimer.
      - 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.
      - Neither the name of The University of Texas at Austin 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 COPYRIGHT
     HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  */
  
  #include "blis.h"
  #include "test_libblis.h"
  
  
  // Static variables.
  static char*     op_str                    = "gemm";
  static char*     o_types                   = "mmm"; // a b c
  static char*     p_types                   = "hh";  // transa transb
  static thresh_t  thresh[BLIS_NUM_FP_TYPES] = { { 1e-04, 1e-05 },   // warn, pass for s
                                                 { 1e-04, 1e-05 },   // warn, pass for c
                                                 { 1e-13, 1e-14 },   // warn, pass for d
                                                 { 1e-13, 1e-14 } }; // warn, pass for z
  
  // Local prototypes.
  void libblis_test_gemm_deps
       (
         test_params_t* params,
         test_op_t*     op
       );
  
  void libblis_test_gemm_experiment
       (
         test_params_t* params,
         test_op_t*     op,
         iface_t        iface,
         num_t          datatype,
         char*          pc_str,
         char*          sc_str,
         unsigned int   p_cur,
         double*        perf,
         double*        resid
       );
  
  void libblis_test_gemm_impl
       (
         iface_t   iface,
         obj_t*    alpha,
         obj_t*    a,
         obj_t*    b,
         obj_t*    beta,
         obj_t*    c
       );
  
  void libblis_test_gemm_check
       (
         test_params_t* params,
         obj_t*         alpha,
         obj_t*         a,
         obj_t*         b,
         obj_t*         beta,
         obj_t*         c,
         obj_t*         c_orig,
         double*        resid
       );
  
  
  
  void libblis_test_gemm_deps
       (
         test_params_t* params,
         test_op_t*     op
       )
  {
  	libblis_test_randv( params, &(op->ops->randv) );
  	libblis_test_randm( params, &(op->ops->randm) );
  	libblis_test_setv( params, &(op->ops->setv) );
  	libblis_test_normfv( params, &(op->ops->normfv) );
  	libblis_test_subv( params, &(op->ops->subv) );
  	libblis_test_scalv( params, &(op->ops->scalv) );
  	libblis_test_copym( params, &(op->ops->copym) );
  	libblis_test_scalm( params, &(op->ops->scalm) );
  	libblis_test_gemv( params, &(op->ops->gemv) );
  }
  
  
  
  void libblis_test_gemm
       (
         test_params_t* params,
         test_op_t*     op
       )
  {
  
  	// Return early if this test has already been done.
  	if ( libblis_test_op_is_done( op ) ) return;
  
  	// Return early if operation is disabled.
  	if ( libblis_test_op_is_disabled( op ) ||
  	     libblis_test_l3_is_disabled( op ) ) return;
  
  	// Call dependencies first.
  	if ( TRUE ) libblis_test_gemm_deps( params, op );
  
  	// Execute the test driver for each implementation requested.
  	//if ( op->front_seq == ENABLE )
  	{
  		libblis_test_op_driver( params,
  		                        op,
  		                        BLIS_TEST_SEQ_FRONT_END,
  		                        op_str,
  		                        p_types,
  		                        o_types,
  		                        thresh,
  		                        libblis_test_gemm_experiment );
  	}
  }
  
  
  
  void libblis_test_gemm_experiment
       (
         test_params_t* params,
         test_op_t*     op,
         iface_t        iface,
         num_t          datatype,
         char*          pc_str,
         char*          sc_str,
         unsigned int   p_cur,
         double*        perf,
         double*        resid
       )
  {
  	unsigned int n_repeats = params->n_repeats;
  	unsigned int i;
  
  	double       time_min  = DBL_MAX;
  	double       time;
  
  	dim_t        m, n, k;
  
  	trans_t      transa;
  	trans_t      transb;
  
  	obj_t        alpha, a, b, beta, c;
  	obj_t        c_save;
  
  
  	// Map the dimension specifier to actual dimensions.
  	m = libblis_test_get_dim_from_prob_size( op->dim_spec[0], p_cur );
  	n = libblis_test_get_dim_from_prob_size( op->dim_spec[1], p_cur );
  	k = libblis_test_get_dim_from_prob_size( op->dim_spec[2], p_cur );
  
  	// Map parameter characters to BLIS constants.
  	bli_param_map_char_to_blis_trans( pc_str[0], &transa );
  	bli_param_map_char_to_blis_trans( pc_str[1], &transb );
  
  	// Create test scalars.
  	bli_obj_scalar_init_detached( datatype, &alpha );
  	bli_obj_scalar_init_detached( datatype, &beta );
  
  	// Create test operands (vectors and/or matrices).
  	libblis_test_mobj_create( params, datatype, transa,
  	                          sc_str[0], m, k, &a );
  	libblis_test_mobj_create( params, datatype, transb,
  	                          sc_str[1], k, n, &b );
  	libblis_test_mobj_create( params, datatype, BLIS_NO_TRANSPOSE,
  	                          sc_str[2], m, n, &c );
  	libblis_test_mobj_create( params, datatype, BLIS_NO_TRANSPOSE,
  	                          sc_str[2], m, n, &c_save );
  
  	// Set alpha and beta.
  	if ( bli_obj_is_real( &c ) )
  	{
  		bli_setsc(  1.2,  0.0, &alpha );
  		bli_setsc(  0.9,  0.0, &beta );
  	}
  	else
  	{
  		bli_setsc(  1.2,  0.8, &alpha );
  		bli_setsc(  0.9,  1.0, &beta );
  	}
  
  	// Randomize A, B, and C, and save C.
  	libblis_test_mobj_randomize( params, TRUE, &a );
  	libblis_test_mobj_randomize( params, TRUE, &b );
  	libblis_test_mobj_randomize( params, TRUE, &c );
  	bli_copym( &c, &c_save );
  
  	// Apply the parameters.
  	bli_obj_set_conjtrans( transa, &a );
  	bli_obj_set_conjtrans( transb, &b );
  
  	// Repeat the experiment n_repeats times and record results. 
  	for ( i = 0; i < n_repeats; ++i )
  	{
  		bli_copym( &c_save, &c );
  
  		time = bli_clock();
  
  		libblis_test_gemm_impl( iface, &alpha, &a, &b, &beta, &c );
  
  		time_min = bli_clock_min_diff( time_min, time );
  	}
  
  	// Estimate the performance of the best experiment repeat.
  	*perf = ( 2.0 * m * n * k ) / time_min / FLOPS_PER_UNIT_PERF;
  	if ( bli_obj_is_complex( &c ) ) *perf *= 4.0;
  
  	// Perform checks.
  	libblis_test_gemm_check( params, &alpha, &a, &b, &beta, &c, &c_save, resid );
  
  	// Zero out performance and residual if output matrix is empty.
  	libblis_test_check_empty_problem( &c, perf, resid );
  
  	// Free the test objects.
  	bli_obj_free( &a );
  	bli_obj_free( &b );
  	bli_obj_free( &c );
  	bli_obj_free( &c_save );
  }
  
  
  
  void libblis_test_gemm_impl
       (
         iface_t   iface,
         obj_t*    alpha,
         obj_t*    a,
         obj_t*    b,
         obj_t*    beta,
         obj_t*    c
       )
  {
  	switch ( iface )
  	{
  		case BLIS_TEST_SEQ_FRONT_END:
  		bli_gemm( alpha, a, b, beta, c );
  		break;
  
  		default:
  		libblis_test_printf_error( "Invalid interface type.\n" );
  	}
  }
  
  
  
  void libblis_test_gemm_check
       (
         test_params_t* params,
         obj_t*         alpha,
         obj_t*         a,
         obj_t*         b,
         obj_t*         beta,
         obj_t*         c,
         obj_t*         c_orig,
         double*        resid
       )
  {
  	num_t  dt      = bli_obj_dt( c );
  	num_t  dt_real = bli_obj_dt_proj_to_real( c );
  
  	dim_t  m       = bli_obj_length( c );
  	dim_t  n       = bli_obj_width( c );
  	dim_t  k       = bli_obj_width_after_trans( a );
  
  	obj_t  norm;
  	obj_t  t, v, w, z;
  
  	double junk;
  
  	//
  	// Pre-conditions:
  	// - a is randomized.
  	// - b is randomized.
  	// - c_orig is randomized.
  	// Note:
  	// - alpha and beta should have non-zero imaginary components in the
  	//   complex cases in order to more fully exercise the implementation.
  	//
  	// Under these conditions, we assume that the implementation for
  	//
  	//   C := beta * C_orig + alpha * transa(A) * transb(B)
  	//
  	// is functioning correctly if
  	//
  	//   normf( v - z )
  	//
  	// is negligible, where
  	//
  	//   v = C * t
  	//   z = ( beta * C_orig + alpha * transa(A) * transb(B) ) * t
  	//     = beta * C_orig * t + alpha * transa(A) * transb(B) * t
  	//     = beta * C_orig * t + alpha * transa(A) * w
  	//     = beta * C_orig * t + z
  	//
  
  	bli_obj_scalar_init_detached( dt_real, &norm );
  
  	bli_obj_create( dt, n, 1, 0, 0, &t );
  	bli_obj_create( dt, m, 1, 0, 0, &v );
  	bli_obj_create( dt, k, 1, 0, 0, &w );
  	bli_obj_create( dt, m, 1, 0, 0, &z );
  
  	libblis_test_vobj_randomize( params, TRUE, &t );
  
  	bli_gemv( &BLIS_ONE, c, &t, &BLIS_ZERO, &v );
  
  	bli_gemv( &BLIS_ONE, b, &t, &BLIS_ZERO, &w );
  	bli_gemv( alpha, a, &w, &BLIS_ZERO, &z );
  	bli_gemv( beta, c_orig, &t, &BLIS_ONE, &z );
  
  	bli_subv( &z, &v );
  	bli_normfv( &v, &norm );
  	bli_getsc( &norm, resid, &junk );
  
  	bli_obj_free( &t );
  	bli_obj_free( &v );
  	bli_obj_free( &w );
  	bli_obj_free( &z );
  }
  
  