Merge remote-tracking branch 'origin/common_scale_function' into integration_2025_w42 (!3608)

use common scale channel functions for DLSCH and ULSCH

Follow up of !3035

openair1/PHY/nr_phy_common/inc/nr_phy_common.h

@@ -364,6 +364,7 @@ void nr_channel_level(const int symbol,
                       const int Nl,
                       int32_t avg[nb_rx * Nl],
                       const uint32_t len);
+void nr_scale_channel(int size, int ch_estimates_ext[][size], int symb, uint32_t len, int nrOfLayers, int nb_rx, int shift_ch_ext);
 bool generate_srs_nr(NR_DL_FRAME_PARMS *frame_parms,
                      c16_t **txdataF,
                      uint16_t symbol_offset,

openair1/PHY/nr_phy_common/src/nr_phy_common.c

@@ -425,6 +425,24 @@ void nr_channel_level(const int symbol,
   }
 }
 
+void nr_scale_channel(int size, int ch_estimates_ext[][size], int symb, uint32_t len, int nrOfLayers, int nb_rx, int shift_ch_ext)
+{
+  for (int l = 0; l < nrOfLayers; l++) {
+    for (int aarx = 0; aarx < nb_rx; aarx++) {
+      simde__m128i *ul_ch128 = (simde__m128i *)&ch_estimates_ext[l * nb_rx + aarx][symb * len];
+      int loop_end = len >> 2;
+      for (int i = 0; i < loop_end; i++) {
+        ul_ch128[i] = simde_mm_srai_epi16(ul_ch128[i], shift_ch_ext);
+      }
+      // loop for the remaining elements
+      int start_index = loop_end * 4;
+      for (int j = start_index; j < len; j++) {
+        c16_t *temp = ((c16_t *)ul_ch128) + j;
+        *temp = c16Shift(*temp, shift_ch_ext);
+      }
+    }
+  }
+}
 
 void nr_fo_compensation(double fo_Hz, int samples_per_ms, int sample_offset, const c16_t *rxdata_in, c16_t *rxdata_out, int size)
 {