-Added RESIZE_DP_ functions for the output SOSI;

-Added g_data_signed generic;
-Re-verified using tb_tb_tb_dp_backpressure.

libraries/base/dp/src/vhdl/dp_fifo_core.vhd

@@ -49,6 +49,7 @@ ENTITY dp_fifo_core IS
   GENERIC (
     g_use_dual_clock : BOOLEAN := FALSE;
     g_data_w         : NATURAL := 16; -- Should be 2 times the c_complex_w if g_use_complex = TRUE
+    g_data_signed    : BOOLEAN := FALSE; -- TRUE extends g_data_w bits with the sign bit, FALSE pads g_data_w bits with zeros.
     g_bsn_w          : NATURAL := 1;
     g_empty_w        : NATURAL := 1;
     g_channel_w      : NATURAL := 1;
@@ -217,13 +218,13 @@ BEGIN
   fifo_rd_req <= rd_siso.ready;
   
   -- SOSI
-  rd_sosi.data(      g_data_w-1 DOWNTO 0) <= rd_data;
-  rd_sosi.re(     c_complex_w-1 DOWNTO 0) <= rd_data(  c_complex_w-1 DOWNTO 0);
-  rd_sosi.im(     c_complex_w-1 DOWNTO 0) <= rd_data(2*c_complex_w-1 DOWNTO c_complex_w);
-  rd_sosi.bsn(        g_bsn_w-1 DOWNTO 0) <= func_slv_extract(c_use_data, g_use_bsn, g_use_empty, g_use_channel, g_use_error, g_use_sync, g_use_ctrl, g_data_w, g_bsn_w, g_empty_w, g_channel_w, g_error_w, 1, c_ctrl_w, fifo_rd_dat, 1);
-  rd_sosi.empty(    g_empty_w-1 DOWNTO 0) <= func_slv_extract(c_use_data, g_use_bsn, g_use_empty, g_use_channel, g_use_error, g_use_sync, g_use_ctrl, g_data_w, g_bsn_w, g_empty_w, g_channel_w, g_error_w, 1, c_ctrl_w, fifo_rd_dat, 2);
-  rd_sosi.channel(g_channel_w-1 DOWNTO 0) <= func_slv_extract(c_use_data, g_use_bsn, g_use_empty, g_use_channel, g_use_error, g_use_sync, g_use_ctrl, g_data_w, g_bsn_w, g_empty_w, g_channel_w, g_error_w, 1, c_ctrl_w, fifo_rd_dat, 3);
-  rd_sosi.err(      g_error_w-1 DOWNTO 0) <= func_slv_extract(c_use_data, g_use_bsn, g_use_empty, g_use_channel, g_use_error, g_use_sync, g_use_ctrl, g_data_w, g_bsn_w, g_empty_w, g_channel_w, g_error_w, 1, c_ctrl_w, fifo_rd_dat, 4);
+  rd_sosi.data    <= RESIZE_DP_SDATA(rd_data) WHEN g_data_signed=TRUE ELSE RESIZE_DP_DATA(rd_data);
+  rd_sosi.re      <= RESIZE_DP_DSP_DATA(rd_data(  c_complex_w-1 DOWNTO 0));
+  rd_sosi.im      <= RESIZE_DP_DSP_DATA(rd_data(2*c_complex_w-1 DOWNTO c_complex_w));
+  rd_sosi.bsn     <= RESIZE_DP_BSN(func_slv_extract(c_use_data, g_use_bsn, g_use_empty, g_use_channel, g_use_error, g_use_sync, g_use_ctrl, g_data_w, g_bsn_w, g_empty_w, g_channel_w, g_error_w, 1, c_ctrl_w, fifo_rd_dat, 1));
+  rd_sosi.empty   <= RESIZE_DP_EMPTY(func_slv_extract(c_use_data, g_use_bsn, g_use_empty, g_use_channel, g_use_error, g_use_sync, g_use_ctrl, g_data_w, g_bsn_w, g_empty_w, g_channel_w, g_error_w, 1, c_ctrl_w, fifo_rd_dat, 2));
+  rd_sosi.channel <= RESIZE_DP_CHANNEL(func_slv_extract(c_use_data, g_use_bsn, g_use_empty, g_use_channel, g_use_error, g_use_sync, g_use_ctrl, g_data_w, g_bsn_w, g_empty_w, g_channel_w, g_error_w, 1, c_ctrl_w, fifo_rd_dat, 3));
+  rd_sosi.err     <= RESIZE_DP_ERROR(func_slv_extract(c_use_data, g_use_bsn, g_use_empty, g_use_channel, g_use_error, g_use_sync, g_use_ctrl, g_data_w, g_bsn_w, g_empty_w, g_channel_w, g_error_w, 1, c_ctrl_w, fifo_rd_dat, 4));
   rd_sync         <= func_slv_extract(c_use_data, g_use_bsn, g_use_empty, g_use_channel, g_use_error, g_use_sync, g_use_ctrl, g_data_w, g_bsn_w, g_empty_w, g_channel_w, g_error_w, 1, c_ctrl_w, fifo_rd_dat, 5);
   rd_ctrl         <= func_slv_extract(c_use_data, g_use_bsn, g_use_empty, g_use_channel, g_use_error, g_use_sync, g_use_ctrl, g_data_w, g_bsn_w, g_empty_w, g_channel_w, g_error_w, 1, c_ctrl_w, fifo_rd_dat, 6);