Adapting PHY code to work with mex-functions:

1. Moving get_pmi into a separate file and making corresponding
changes in CMakeLists.txt.
2. Creating PHY_MEX library with functions required for the receiver
mex-functions.
3. Making necessary changes in defs_UE.h so that mex-functions
do not complain about multiple LOG_ calls.

cmake_targets/CMakeLists.txt

@@ -669,6 +669,7 @@ add_boolean_option(SMBV                    False "Rohde&Schwarz SMBV100A vector
 add_boolean_option(DEBUG_PHY               False "Enable PHY layer debugging options")
 add_boolean_option(DEBUG_PHY_PROC          False "Enable debugging of PHY layer procedures")
 add_boolean_option(DEBUG_DLSCH             False "Enable debugging of DLSCH physical layer channel")
+add_boolean_option(MEX                     False "Enabling compilation with mex")
 
 ##########################
 # NAS LAYER OPTIONS
@@ -1177,6 +1178,7 @@ set(PHY_SRC_UE
   ${OPENAIR1_DIR}/PHY/LTE_UE_TRANSPORT/sss_ue.c
   ${OPENAIR1_DIR}/PHY/LTE_UE_TRANSPORT/dlsch_demodulation.c
   ${OPENAIR1_DIR}/PHY/LTE_UE_TRANSPORT/dlsch_llr_computation.c
+  ${OPENAIR1_DIR}/PHY/LTE_UE_TRANSPORT/get_pmi.c
   ${OPENAIR1_DIR}/PHY/LTE_UE_TRANSPORT/linear_preprocessing_rec.c
   ${OPENAIR1_DIR}/PHY/LTE_UE_TRANSPORT/dlsch_decoding.c
   ${OPENAIR1_DIR}/PHY/LTE_UE_TRANSPORT/dci_tools_ue.c
@@ -1225,6 +1227,27 @@ add_library(PHY ${PHY_SRC})
 add_library(PHY_UE ${PHY_SRC_UE})
 add_library(PHY_RU ${PHY_SRC_RU})
 
+#Library for mex functions
+#########################3
+set(PHY_MEX_UE
+  ${OPENAIR1_DIR}/PHY/LTE_UE_TRANSPORT/linear_preprocessing_rec.c
+  ${OPENAIR1_DIR}/PHY/LTE_UE_TRANSPORT/dlsch_llr_computation.c
+  ${OPENAIR1_DIR}/PHY/LTE_UE_TRANSPORT/dlsch_demodulation.c
+  ${OPENAIR1_DIR}/PHY/TOOLS/log2_approx.c
+  ${OPENAIR1_DIR}/PHY/LTE_TRANSPORT/lte_mcs.c
+  ${OPENAIR1_DIR}/PHY/LTE_UE_TRANSPORT/get_pmi.c
+  ${OPENAIR1_DIR}/PHY/TOOLS/dB_routines.c
+  ${OPENAIR1_DIR}/PHY/LTE_TRANSPORT/pmch_common.c
+  ${OPENAIR1_DIR}/PHY/TOOLS/cadd_vv.c
+  ${OPENAIR1_DIR}/PHY/TOOLS/cmult_sv.c
+  ${OPENAIR1_DIR}/PHY/TOOLS/cmult_vv.c
+  ${OPENAIR1_DIR}/PHY/LTE_UE_TRANSPORT/dlsch_llr_computation_avx2.c
+  ${OPENAIR1_DIR}/PHY/TOOLS/signal_energy.c
+  ${OPENAIR1_DIR}/PHY/LTE_ESTIMATION/lte_ue_measurements.c
+${OPENAIR2_DIR}/UTIL/LOG/log.c
+  )
+add_library(PHY_MEX ${PHY_MEX_UE})
+
 #Layer 2 library
 #####################
 set(MAC_DIR ${OPENAIR2_DIR}/LAYER2/MAC)

openair1/PHY/LTE_TRANSPORT/dci_tools_common.c

@@ -165,49 +165,6 @@ int8_t delta_PUSCH_acc[4] = {-1,0,1,3};
 
 int8_t *delta_PUCCH_lut = delta_PUSCH_acc;
 
-uint8_t get_pmi(uint8_t N_RB_DL, MIMO_mode_t mode, uint32_t pmi_alloc,uint16_t rb)
-{
-  /*
-  MIMO_mode_t mode   = dlsch_harq->mimo_mode;
-  uint32_t pmi_alloc = dlsch_harq->pmi_alloc;
-  */
-
-  switch (N_RB_DL) {
-    case 6:   // 1 PRB per subband
-      if (mode <= PUSCH_PRECODING1)
-        return((pmi_alloc>>(rb<<1))&3);
-      else
-        return((pmi_alloc>>rb)&1);
-
-      break;
-
-    default:
-    case 25:  // 4 PRBs per subband
-      if (mode <= PUSCH_PRECODING1)
-        return((pmi_alloc>>((rb>>2)<<1))&3);
-      else
-        return((pmi_alloc>>(rb>>2))&1);
-
-      break;
-
-    case 50: // 6 PRBs per subband
-      if (mode <= PUSCH_PRECODING1)
-        return((pmi_alloc>>((rb/6)<<1))&3);
-      else
-        return((pmi_alloc>>(rb/6))&1);
-
-      break;
-
-    case 100: // 8 PRBs per subband
-      if (mode <= PUSCH_PRECODING1)
-        return((pmi_alloc>>((rb>>3)<<1))&3);
-      else
-        return((pmi_alloc>>(rb>>3))&1);
-
-      break;
-  }
-}
-
 uint32_t check_phich_reg(LTE_DL_FRAME_PARMS *frame_parms,uint32_t kprime,uint8_t lprime,uint8_t mi)
 {
 

openair1/PHY/LTE_UE_TRANSPORT/get_pmi.c

+/*
+ * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The OpenAirInterface Software Alliance licenses this file to You under
+ * the OAI Public License, Version 1.1  (the "License"); you may not use this file
+ * except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.openairinterface.org/?page_id=698
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *-------------------------------------------------------------------------------
+ * For more information about the OpenAirInterface (OAI) Software Alliance:
+ *      contact@openairinterface.org
+ */
+
+#include "PHY/LTE_UE_TRANSPORT/transport_proto_ue.h"
+
+uint8_t get_pmi(uint8_t N_RB_DL, MIMO_mode_t mode, uint32_t pmi_alloc,uint16_t rb)
+{
+  /*
+  MIMO_mode_t mode   = dlsch_harq->mimo_mode;
+  uint32_t pmi_alloc = dlsch_harq->pmi_alloc;
+  */
+
+  switch (N_RB_DL) {
+    case 6:   // 1 PRB per subband
+      if (mode <= PUSCH_PRECODING1)
+        return((pmi_alloc>>(rb<<1))&3);
+      else
+        return((pmi_alloc>>rb)&1);
+
+      break;
+
+    default:
+    case 25:  // 4 PRBs per subband
+      if (mode <= PUSCH_PRECODING1)
+        return((pmi_alloc>>((rb>>2)<<1))&3);
+      else
+        return((pmi_alloc>>(rb>>2))&1);
+
+      break;
+
+    case 50: // 6 PRBs per subband
+      if (mode <= PUSCH_PRECODING1)
+        return((pmi_alloc>>((rb/6)<<1))&3);
+      else
+        return((pmi_alloc>>(rb/6))&1);
+
+      break;
+
+    case 100: // 8 PRBs per subband
+      if (mode <= PUSCH_PRECODING1)
+        return((pmi_alloc>>((rb>>3)<<1))&3);
+      else
+        return((pmi_alloc>>(rb>>3))&1);
+
+      break;
+  }
+}

openair1/PHY/defs_UE.h

@@ -69,6 +69,38 @@
 #include <pthread.h>
 #include "assertions.h"
 
+#ifdef MEX
+#include "mex.h"
+# define msg mexPrintf
+# undef LOG_D
+# undef LOG_E
+# undef LOG_I
+# undef LOG_N
+# undef LOG_T
+# undef LOG_W
+# undef LOG_M
+# define LOG_D(x, ...) mexPrintf(__VA_ARGS__)
+# define LOG_E(x, ...) mexPrintf(__VA_ARGS__)
+# define LOG_I(x, ...) mexPrintf(__VA_ARGS__)
+# define LOG_N(x, ...) mexPrintf(__VA_ARGS__)
+# define LOG_T(x, ...) mexPrintf(__VA_ARGS__)
+# define LOG_W(x, ...) mexPrintf(__VA_ARGS__)
+# define LOG_M(x, ...) mexPrintf(__VA_ARGS__)
+#else
+# ifdef OPENAIR2
+#   if ENABLE_RAL
+#     include "collection/hashtable/hashtable.h"
+#     include "COMMON/ral_messages_types.h"
+#     include "UTIL/queue.h"
+#   endif
+#   include "log.h"
+#   define msg(aRGS...) LOG_D(PHY, ##aRGS)
+# else
+#   define msg printf
+# endif
+#endif
+
+
 
 /// Context data structure for RX/TX portion of subframe processing
 typedef struct {