Fixed polar encoder and decoder initialization failure for ARM. Initialization unconditionally used x86 SIMD routines instead of getting disabled for ARM compilations.

lib/src/phy/phch/pdcch_nr.c

@@ -185,8 +185,13 @@ int srsran_pdcch_nr_init_tx(srsran_pdcch_nr_t* q, const srsran_pdcch_nr_args_t*
   }
   q->is_tx = true;
 
-  srsran_polar_encoder_type_t encoder_type =
+  srsran_polar_encoder_type_t encoder_type = SRSRAN_POLAR_ENCODER_PIPELINED;
-      (args->disable_simd) ? SRSRAN_POLAR_ENCODER_PIPELINED : SRSRAN_POLAR_ENCODER_AVX2;
+
+#ifdef LV_HAVE_AVX2
+  if (!args->disable_simd) {
+    encoder_type = SRSRAN_POLAR_ENCODER_AVX2;
+  }
+#endif // LV_HAVE_AVX2
 
   if (srsran_polar_encoder_init(&q->encoder, encoder_type, NMAX_LOG) < SRSRAN_SUCCESS) {
     return SRSRAN_ERROR;
@@ -205,8 +210,13 @@ int srsran_pdcch_nr_init_rx(srsran_pdcch_nr_t* q, const srsran_pdcch_nr_args_t*
     return SRSRAN_ERROR;
   }
 
-  srsran_polar_decoder_type_t decoder_type =
+  srsran_polar_decoder_type_t decoder_type = SRSRAN_POLAR_DECODER_SSC_C;
-      (args->disable_simd) ? SRSRAN_POLAR_DECODER_SSC_C : SRSRAN_POLAR_DECODER_SSC_C_AVX2;
+
+#ifdef LV_HAVE_AVX2
+  if (!args->disable_simd) {
+    decoder_type = SRSRAN_POLAR_DECODER_SSC_C_AVX2;
+  }
+#endif // LV_HAVE_AVX2
 
   if (srsran_polar_decoder_init(&q->decoder, decoder_type, NMAX_LOG) < SRSRAN_SUCCESS) {
     return SRSRAN_ERROR;