Updating Opus to a pre-release of 1.1

silk/fixed/solve_LS_FIX.c

 /***********************************************************************
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 - Redistributions in binary form must reproduce the above copyright
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-- Neither the name of Internet Society, IETF or IETF Trust, nor the 
+- Neither the name of Internet Society, IETF or IETF Trust, nor the
 names of specific 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”
+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 OWNER OR CONTRIBUTORS BE
 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 
 #include "main_FIX.h"
+#include "stack_alloc.h"
 #include "tuning_parameters.h"
 
 /*****************************/
 /* Internal function headers */
 /*****************************/
 
 typedef struct {
     opus_int32 Q36_part;
     opus_int32 Q48_part;
 } inv_D_t;
@@ skipping 29 matching lines @@
 );
 
 /* Solves Ax = b, assuming A is symmetric */
 void silk_solve_LDL_FIX(
     opus_int32                      *A,                                     /* I    Pointer to symetric square matrix A                                         */
     opus_int                        M,                                      /* I    Size of matrix                                                              */
     const opus_int32                *b,                                     /* I    Pointer to b vector                                                         */
     opus_int32                      *x_Q16                                  /* O    Pointer to x solution vector                                                */
 )
 {
-    opus_int32 L_Q16[  MAX_MATRIX_SIZE * MAX_MATRIX_SIZE ];
+    VARDECL( opus_int32, L_Q16 );
     opus_int32 Y[      MAX_MATRIX_SIZE ];
     inv_D_t   inv_D[  MAX_MATRIX_SIZE ];
+    SAVE_STACK;
 
     silk_assert( M <= MAX_MATRIX_SIZE );
+    ALLOC( L_Q16, M * M, opus_int32 );
 
     /***************************************************
     Factorize A by LDL such that A = L*D*L',
     where L is lower triangular with ones on diagonal
     ****************************************************/
     silk_LDL_factorize_FIX( A, M, L_Q16, inv_D );
 
     /****************************************************
     * substitute D*L'*x = Y. ie:
     L*D*L'*x = b => L*Y = b <=> Y = inv(L)*b
     ******************************************************/
     silk_LS_SolveFirst_FIX( L_Q16, M, b, Y );
 
     /****************************************************
     D*L'*x = Y <=> L'*x = inv(D)*Y, because D is
     diagonal just multiply with 1/d_i
     ****************************************************/
     silk_LS_divide_Q16_FIX( Y, inv_D, M );
 
     /****************************************************
     x = inv(L') * inv(D) * Y
     *****************************************************/
     silk_LS_SolveLast_FIX( L_Q16, M, Y, x_Q16 );
+    RESTORE_STACK;
 }
 
 static inline void silk_LDL_factorize_FIX(
     opus_int32          *A,         /* I/O Pointer to Symetric Square Matrix                            */
     opus_int            M,          /* I   Size of Matrix                                               */
     opus_int32          *L_Q16,     /* I/O Pointer to Square Upper triangular Matrix                    */
     inv_D_t             *inv_D      /* I/O Pointer to vector holding inverted diagonal elements of D    */
 )
 {
     opus_int   i, j, k, status, loop_count;
@@ skipping 116 matching lines @@
 
     for( i = M - 1; i >= 0; i-- ) {
         ptr32 = matrix_adr( L_Q16, 0, i, M );
         tmp_32 = 0;
         for( j = M - 1; j > i; j-- ) {
             tmp_32 = silk_SMLAWW( tmp_32, ptr32[ silk_SMULBB( j, M ) ], x_Q16[ j ] );
         }
         x_Q16[ i ] = silk_SUB32( b[ i ], tmp_32 );
     }
 }