Change saturation of mult_d to MM size

hdl/corr_iir.vhd

@@ -44,7 +44,7 @@ architecture rtl of corr_iir is
     constant C_DELAY    : natural := 6;
 
     constant C_W_MULT   : natural := C_W_MM+C_W_COR_COEF;
-    constant C_W_CORFP  : natural := C_W_COR+C_W_FP;
+    constant C_W_CORFP  : natural := C_W_MM;
 
     type arr_slv is array (natural range <>) of std_logic_vector;
     signal delay_valid  : std_logic_vector(C_DELAY-1 downto 0);
@@ -96,7 +96,7 @@ begin
 
         signal rndsat_mult_a    : signed(C_W_MM-1 downto 0);
         signal rndsat_mult_b    : signed(C_W_MM-1 downto 0);
-        signal rndsat_mult_d    : signed(C_W_CORFP+C_W_COR_COEF-C_W_COR_COEFFP-1 downto 0);
+        signal rndsat_mult_d    : signed(C_W_MM-1 downto 0);
 
         signal coef_a       : signed(C_W_COR_COEF-1 downto 0);
         signal coef_b       : signed(C_W_COR_COEF-1 downto 0);
@@ -202,11 +202,11 @@ begin
                 if mult_d(C_W_COR_COEFFP-1) = '0' then
                     rndsat_mult_d   <= f_resize_sat(
                                         f_resize_lsb(mult_d, mult_d'length-C_W_COR_COEFFP),
-                                       rndsat_mult_d'length);
+                                       C_W_MM);
                 else
                     rndsat_mult_d   <= f_resize_sat(
                                         f_sum_sat(f_resize_lsb(mult_d, mult_d'length-C_W_COR_COEFFP), to_signed(1,2)),
-                                       rndsat_mult_d'length);
+                                       C_W_MM);
                 end if;
 
                 ----------------------------------------------------------------------------------------------------------
@@ -229,7 +229,7 @@ begin
 
         -- mapping
         corrout(I) <= rnd_cor;
-        corrout_fp(I) <= reg_dout2;
+        corrout_fp(I) <= f_resize_sat(reg_dout2, C_W_COR+C_W_FP);
 
     end generate gen_corr;