align variables on stack in rank_estimation_tm3_tm4

dlsim_tm4 was crashing on massive. It was a problem
of misalignment of variables. The generated code by
the compiler was using 'movdqa' which requires alignment
to 16 bytes. Let's put 32, just in case, for avx2 maybe
(maybe not necessary but should not hurt).

openair1/PHY/LTE_ESTIMATION/lte_ue_measurements.c

@@ -852,13 +852,30 @@ uint8_t rank_estimation_tm3_tm4 (int *dl_ch_estimates_00, // please respect the
 
   int count=0;
 
-  int32_t conjch00_ch01[12*N_RB], conjch01_ch00[12*N_RB], conjch10_ch11[12*N_RB], conjch11_ch10[12*N_RB];
-  int32_t conjch00_ch00[12*N_RB], conjch01_ch01[12*N_RB], conjch10_ch10[12*N_RB], conjch11_ch11[12*N_RB];
-  int32_t af_mf_00[12*N_RB], af_mf_00_sq[12*N_RB], af_mf_01_sq[12*N_RB], af_mf_10_sq[12*N_RB];
-  int32_t af_mf_11_sq[12*N_RB], af_mf_01[12*N_RB], af_mf_10[12*N_RB], af_mf_11[12*N_RB];
-  int32_t determ_fin[12*N_RB], denum_db[12*N_RB];
-  int32_t numer_fin[12*N_RB], numer_db[12*N_RB];
-  int32_t cond_db[12*N_RB];
+  /* we need at least alignment to 16 bytes, let's put 32 to be sure
+   * (maybe not necessary but doesn't hurt)
+   */
+  int32_t conjch00_ch01[12*N_RB] __attribute__((aligned(32)));
+  int32_t conjch01_ch00[12*N_RB] __attribute__((aligned(32)));
+  int32_t conjch10_ch11[12*N_RB] __attribute__((aligned(32)));
+  int32_t conjch11_ch10[12*N_RB] __attribute__((aligned(32)));
+  int32_t conjch00_ch00[12*N_RB] __attribute__((aligned(32)));
+  int32_t conjch01_ch01[12*N_RB] __attribute__((aligned(32)));
+  int32_t conjch10_ch10[12*N_RB] __attribute__((aligned(32)));
+  int32_t conjch11_ch11[12*N_RB] __attribute__((aligned(32)));
+  int32_t af_mf_00[12*N_RB] __attribute__((aligned(32)));
+  int32_t af_mf_00_sq[12*N_RB] __attribute__((aligned(32)));
+  int32_t af_mf_01_sq[12*N_RB] __attribute__((aligned(32)));
+  int32_t af_mf_10_sq[12*N_RB] __attribute__((aligned(32)));
+  int32_t af_mf_11_sq[12*N_RB] __attribute__((aligned(32)));
+  int32_t af_mf_01[12*N_RB] __attribute__((aligned(32)));
+  int32_t af_mf_10[12*N_RB] __attribute__((aligned(32)));
+  int32_t af_mf_11[12*N_RB] __attribute__((aligned(32)));
+  int32_t determ_fin[12*N_RB] __attribute__((aligned(32)));
+  int32_t denum_db[12*N_RB] __attribute__((aligned(32)));
+  int32_t numer_fin[12*N_RB] __attribute__((aligned(32)));
+  int32_t numer_db[12*N_RB] __attribute__((aligned(32)));
+  int32_t cond_db[12*N_RB] __attribute__((aligned(32)));
 
   ch00_rank = dl_ch_estimates_00;
   ch01_rank = dl_ch_estimates_01;