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Functions
FLA_Apply_Q_UT_lhbr_blk_var1.c File Reference

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Functions

FLA_Error FLA_Apply_Q_UT_lhbr_blk_var1 (FLA_Obj A, FLA_Obj T, FLA_Obj W, FLA_Obj B, fla_apqut_t *cntl)
 

Function Documentation

◆ FLA_Apply_Q_UT_lhbr_blk_var1()

FLA_Error FLA_Apply_Q_UT_lhbr_blk_var1 ( FLA_Obj  A,
FLA_Obj  T,
FLA_Obj  W,
FLA_Obj  B,
fla_apqut_t cntl 
)
90 {
91  FLA_Obj ATL, ATR, A00, A01, A02,
92  ABL, ABR, A10, A11, A12,
93  A20, A21, A22;
94 
95  FLA_Obj TL, TR, T0, T1, T2;
96 
97  FLA_Obj T1T,
98  T2B;
99 
100  FLA_Obj WTL, WTR,
101  WBL, WBR;
102 
103  FLA_Obj BT, B0,
104  BB, B1,
105  B2;
106 
107  dim_t b_alg, b;
108  dim_t m_BR, n_BR;
109 
110  // Query the algorithmic blocksize by inspecting the length of T.
111  b_alg = FLA_Obj_length( T );
112 
113  // If m < n, then we have to initialize our partitionings carefully so
114  // that we begin in the proper location in A and B (since we traverse
115  // matrix A from BR to TL).
116  if ( FLA_Obj_length( A ) < FLA_Obj_width( A ) )
117  {
118  m_BR = 0;
119  n_BR = FLA_Obj_width( A ) - FLA_Obj_length( A );
120  }
121  else if ( FLA_Obj_length( A ) > FLA_Obj_width( A ) )
122  {
123  m_BR = FLA_Obj_length( A ) - FLA_Obj_width( A );
124  n_BR = 0;
125  }
126  else
127  {
128  m_BR = 0;
129  n_BR = 0;
130  }
131 
132  FLA_Part_2x2( A, &ATL, &ATR,
133  &ABL, &ABR, m_BR, n_BR, FLA_BR );
134 
135  // A and T are dependent; we determine T matrix w.r.t. A
136  FLA_Part_1x2( T, &TL, &TR, FLA_Obj_min_dim( A ), FLA_LEFT );
137 
138  // Be carefule that A contains reflector in row-wise;
139  // corresponding B should be partitioned with n_BR.
140  FLA_Part_2x1( B, &BT,
141  &BB, n_BR, FLA_BOTTOM );
142 
143  while ( FLA_Obj_min_dim( ATL ) > 0 ){
144 
145  b = min( b_alg, FLA_Obj_min_dim( ATL ) );
146 
147  // Since T was filled from left to right, and since we need to access them
148  // in reverse order, we need to handle the case where the last block is
149  // smaller than the other b x b blocks.
150  if ( FLA_Obj_width( TR ) == 0 && FLA_Obj_width( T ) % b_alg > 0 )
151  b = FLA_Obj_width( T ) % b_alg;
152 
153  FLA_Repart_2x2_to_3x3( ATL, /**/ ATR, &A00, &A01, /**/ &A02,
154  &A10, &A11, /**/ &A12,
155  /* ************* */ /* ******************** */
156  ABL, /**/ ABR, &A20, &A21, /**/ &A22,
157  b, b, FLA_TL );
158 
159  FLA_Repart_1x2_to_1x3( TL, /**/ TR, &T0, &T1, /**/ &T2,
160  b, FLA_LEFT );
161 
162  FLA_Repart_2x1_to_3x1( BT, &B0,
163  &B1,
164  /* ** */ /* ** */
165  BB, &B2, b, FLA_TOP );
166 
167  /*------------------------------------------------------------*/
168 
169  FLA_Part_2x1( T1, &T1T,
170  &T2B, b, FLA_TOP );
171 
172  FLA_Part_2x2( W, &WTL, &WTR,
173  &WBL, &WBR, b, FLA_Obj_width( B1 ), FLA_TL );
174 
175  // WTL = B1;
176 
177  FLA_Copyt_internal( FLA_NO_TRANSPOSE, B1, WTL,
178  FLA_Cntl_sub_copyt( cntl ) );
179 
180  // U11 = triuu( A11 );
181  // U12 = A12;
182  //
183  // WTL = inv( triu(T1T) ) * ( conj(U11) * B1 + conj(U12) * B2 );
184 
185  FLA_Trmm_internal( FLA_LEFT, FLA_UPPER_TRIANGULAR,
186  FLA_CONJ_NO_TRANSPOSE, FLA_UNIT_DIAG,
187  FLA_ONE, A11, WTL,
188  FLA_Cntl_sub_trmm1( cntl ) );
189 
190  FLA_Gemm_internal( FLA_CONJ_NO_TRANSPOSE, FLA_NO_TRANSPOSE,
191  FLA_ONE, A12, B2, FLA_ONE, WTL,
192  FLA_Cntl_sub_gemm1( cntl ) );
193 
194  FLA_Trsm_internal( FLA_LEFT, FLA_UPPER_TRIANGULAR,
195  FLA_NO_TRANSPOSE, FLA_NONUNIT_DIAG,
196  FLA_ONE, T1T, WTL,
197  FLA_Cntl_sub_trsm( cntl ) );
198 
199  // B2 = B2 - U12^T * WTL;
200  // B1 = B1 - U11^T * WTL;
201 
202  FLA_Gemm_internal( FLA_TRANSPOSE, FLA_NO_TRANSPOSE,
203  FLA_MINUS_ONE, A12, WTL, FLA_ONE, B2,
204  FLA_Cntl_sub_gemm2( cntl ) );
205 
206  FLA_Trmm_internal( FLA_LEFT, FLA_UPPER_TRIANGULAR,
207  FLA_TRANSPOSE, FLA_UNIT_DIAG,
208  FLA_MINUS_ONE, A11, WTL,
209  FLA_Cntl_sub_trmm2( cntl ) );
210 
211  FLA_Axpyt_internal( FLA_NO_TRANSPOSE, FLA_ONE, WTL, B1,
212  FLA_Cntl_sub_axpyt( cntl ) );
213 
214  /*------------------------------------------------------------*/
215 
216  FLA_Cont_with_3x3_to_2x2( &ATL, /**/ &ATR, A00, /**/ A01, A02,
217  /* ************** */ /* ****************** */
218  A10, /**/ A11, A12,
219  &ABL, /**/ &ABR, A20, /**/ A21, A22,
220  FLA_BR );
221 
222  FLA_Cont_with_1x3_to_1x2( &TL, /**/ &TR, T0, /**/ T1, T2,
223  FLA_RIGHT );
224 
225  FLA_Cont_with_3x1_to_2x1( &BT, B0,
226  /* ** */ /* ** */
227  B1,
228  &BB, B2, FLA_BOTTOM );
229  }
230 
231  return FLA_SUCCESS;
232 }
FLA_Error FLA_Axpyt_internal(FLA_Trans trans, FLA_Obj alpha, FLA_Obj A, FLA_Obj B, fla_axpyt_t *cntl)
Definition: FLA_Axpyt_internal.c:16
FLA_Error FLA_Copyt_internal(FLA_Trans trans, FLA_Obj A, FLA_Obj B, fla_copyt_t *cntl)
Definition: FLA_Copyt_internal.c:16
FLA_Error FLA_Gemm_internal(FLA_Trans transa, FLA_Trans transb, FLA_Obj alpha, FLA_Obj A, FLA_Obj B, FLA_Obj beta, FLA_Obj C, fla_gemm_t *cntl)
Definition: FLA_Gemm_internal.c:16
FLA_Error FLA_Trmm_internal(FLA_Side side, FLA_Uplo uplo, FLA_Trans transa, FLA_Diag diag, FLA_Obj alpha, FLA_Obj A, FLA_Obj B, fla_trmm_t *cntl)
Definition: FLA_Trmm_internal.c:16
FLA_Error FLA_Trsm_internal(FLA_Side side, FLA_Uplo uplo, FLA_Trans transa, FLA_Diag diag, FLA_Obj alpha, FLA_Obj A, FLA_Obj B, fla_trsm_t *cntl)
Definition: FLA_Trsm_internal.c:16
FLA_Obj FLA_MINUS_ONE
Definition: FLA_Init.c:22
FLA_Obj FLA_ONE
Definition: FLA_Init.c:18
FLA_Error FLA_Cont_with_3x3_to_2x2(FLA_Obj *ATL, FLA_Obj *ATR, FLA_Obj A00, FLA_Obj A01, FLA_Obj A02, FLA_Obj A10, FLA_Obj A11, FLA_Obj A12, FLA_Obj *ABL, FLA_Obj *ABR, FLA_Obj A20, FLA_Obj A21, FLA_Obj A22, FLA_Quadrant quadrant)
Definition: FLA_View.c:304
FLA_Error FLA_Part_2x2(FLA_Obj A, FLA_Obj *A11, FLA_Obj *A12, FLA_Obj *A21, FLA_Obj *A22, dim_t mb, dim_t nb, FLA_Quadrant quadrant)
Definition: FLA_View.c:17
FLA_Error FLA_Cont_with_3x1_to_2x1(FLA_Obj *AT, FLA_Obj A0, FLA_Obj A1, FLA_Obj *AB, FLA_Obj A2, FLA_Side side)
Definition: FLA_View.c:428
FLA_Error FLA_Repart_2x1_to_3x1(FLA_Obj AT, FLA_Obj *A0, FLA_Obj *A1, FLA_Obj AB, FLA_Obj *A2, dim_t mb, FLA_Side side)
Definition: FLA_View.c:226
FLA_Error FLA_Cont_with_1x3_to_1x2(FLA_Obj *AL, FLA_Obj *AR, FLA_Obj A0, FLA_Obj A1, FLA_Obj A2, FLA_Side side)
Definition: FLA_View.c:475
dim_t FLA_Obj_width(FLA_Obj obj)
Definition: FLA_Query.c:123
FLA_Error FLA_Part_1x2(FLA_Obj A, FLA_Obj *A1, FLA_Obj *A2, dim_t nb, FLA_Side side)
Definition: FLA_View.c:110
FLA_Error FLA_Part_2x1(FLA_Obj A, FLA_Obj *A1, FLA_Obj *A2, dim_t mb, FLA_Side side)
Definition: FLA_View.c:76
dim_t FLA_Obj_length(FLA_Obj obj)
Definition: FLA_Query.c:116
FLA_Error FLA_Repart_2x2_to_3x3(FLA_Obj ATL, FLA_Obj ATR, FLA_Obj *A00, FLA_Obj *A01, FLA_Obj *A02, FLA_Obj *A10, FLA_Obj *A11, FLA_Obj *A12, FLA_Obj ABL, FLA_Obj ABR, FLA_Obj *A20, FLA_Obj *A21, FLA_Obj *A22, dim_t mb, dim_t nb, FLA_Quadrant quadrant)
Definition: FLA_View.c:142
FLA_Error FLA_Repart_1x2_to_1x3(FLA_Obj AL, FLA_Obj AR, FLA_Obj *A0, FLA_Obj *A1, FLA_Obj *A2, dim_t nb, FLA_Side side)
Definition: FLA_View.c:267
dim_t FLA_Obj_min_dim(FLA_Obj obj)
Definition: FLA_Query.c:153
unsigned long dim_t
Definition: FLA_type_defs.h:71
Definition: FLA_type_defs.h:159

References FLA_Axpyt_internal(), FLA_Cont_with_1x3_to_1x2(), FLA_Cont_with_3x1_to_2x1(), FLA_Cont_with_3x3_to_2x2(), FLA_Copyt_internal(), FLA_Gemm_internal(), FLA_MINUS_ONE, FLA_Obj_length(), FLA_Obj_min_dim(), FLA_Obj_width(), FLA_ONE, FLA_Part_1x2(), FLA_Part_2x1(), FLA_Part_2x2(), FLA_Repart_1x2_to_1x3(), FLA_Repart_2x1_to_3x1(), FLA_Repart_2x2_to_3x3(), FLA_Trmm_internal(), and FLA_Trsm_internal().

Referenced by FLA_Apply_Q_UT_lhbr().