Added g_round_even support, default FALSE for backwards compatibility.

libraries/base/common/src/vhdl/common_requantize.vhd

@@ -57,9 +57,10 @@ ENTITY common_requantize IS
     g_lsb_w               : INTEGER := 4;         -- when > 0, number of LSbits to remove from in_dat
                                                   -- when < 0, number of LSBits to insert as a gain before resize to out_dat'LENGTH
                                                   -- when 0 then no effect
-    g_lsb_round           : BOOLEAN := TRUE;      -- when true ROUND else TRUNCATE the input LSbits
-    g_lsb_round_clip      : BOOLEAN := FALSE;     -- when true round clip to +max to avoid wrapping to output -min (signed) or 0 (unsigned) due to rounding
-    g_msb_clip            : BOOLEAN := TRUE;      -- when true CLIP else WRAP the input MSbits
+    g_lsb_round           : BOOLEAN := TRUE;      -- when TRUE round else truncate the input LSbits
+    g_lsb_round_clip      : BOOLEAN := FALSE;     -- when TRUE round clip to +max to avoid wrapping to output -min (signed) or 0 (unsigned) due to rounding
+    g_lsb_round_even      : BOOLEAN := FALSE;     -- when TRUE round to even, else round away from zero
+    g_msb_clip            : BOOLEAN := TRUE;      -- when TRUE CLIP else WRAP the input MSbits
     g_msb_clip_symmetric  : BOOLEAN := FALSE;     -- when TRUE clip signed symmetric to +c_smax and -c_smax, else to +c_smax and c_smin_symm
                                                   -- for wrapping when g_msb_clip=FALSE the g_msb_clip_symmetric is ignored, so signed wrapping is done asymmetric
     g_gain_w              : NATURAL := 0;         -- do not use, must be 0, use negative g_lsb_w instead
@@ -101,6 +102,7 @@ BEGIN
     g_representation  => g_representation,
     g_round           => g_lsb_round,
     g_round_clip      => g_lsb_round_clip,
+    g_round_even      => g_lsb_round_even,
     g_pipeline_input  => 0,
     g_pipeline_output => g_pipeline_remove_lsb,
     g_in_dat_w        => g_in_dat_w,

libraries/base/common/src/vhdl/common_round.vhd

@@ -43,7 +43,7 @@ ENTITY common_round IS
     g_representation  : STRING  := "SIGNED";  -- SIGNED (round +-0.5 away from zero to +- infinity) or UNSIGNED rounding (round 0.5 up to + inifinity)
     g_round           : BOOLEAN := TRUE;      -- when TRUE round the input, else truncate the input
     g_round_clip      : BOOLEAN := FALSE;     -- when TRUE clip rounded input >= +max to avoid wrapping to output -min (signed) or 0 (unsigned)
-    g_round_even      : BOOLEAN := FALSE;     -- when TRUE round even
+    g_round_even      : BOOLEAN := FALSE;     -- when TRUE round to even, else round away from zero
     g_pipeline_input  : NATURAL := 0;         -- >= 0
     g_pipeline_output : NATURAL := 1;         -- >= 0, use g_pipeline_input=0 and g_pipeline_output=0 for combinatorial output
     g_in_dat_w        : NATURAL := 36;

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

@@ -34,14 +34,15 @@ USE common_lib.common_pkg.ALL;
 
 ENTITY dp_requantize IS
   GENERIC (               
-    g_complex             : BOOLEAN := TRUE;      -- when true, the re and im field are processed, when false, the data field is processed
+    g_complex             : BOOLEAN := TRUE;      -- when TRUE, the re and im field are processed, when false, the data field is processed
     g_representation      : STRING  := "SIGNED";  -- SIGNED (round +-0.5 away from zero to +- infinity) or UNSIGNED rounding (round 0.5 up to + inifinity)         
     g_lsb_w               : INTEGER := 4;         -- when > 0, number of LSbits to remove from in_dat
                                                   -- when < 0, number of LSBits to insert as a gain before resize to out_dat'LENGTH
                                                   -- when 0 then no effect
-    g_lsb_round           : BOOLEAN := TRUE;      -- when true ROUND else TRUNCATE the input LSbits                                                                
-    g_lsb_round_clip      : BOOLEAN := FALSE;     -- when true round clip to +max to avoid wrapping to output -min (signed) or 0 (unsigned) due to rounding        
-    g_msb_clip            : BOOLEAN := TRUE;      -- when true CLIP else WRAP the input MSbits                                                                     
+    g_lsb_round           : BOOLEAN := TRUE;      -- when TRUE round else truncate the input LSbits
+    g_lsb_round_clip      : BOOLEAN := FALSE;     -- when TRUE round clip to +max to avoid wrapping to output -min (signed) or 0 (unsigned) due to rounding
+    g_lsb_round_even      : BOOLEAN := FALSE;     -- when TRUE round to even, else round away from zero
+    g_msb_clip            : BOOLEAN := TRUE;      -- when TRUE CLIP else WRAP the input MSbits
     g_msb_clip_symmetric  : BOOLEAN := FALSE;     -- when TRUE clip signed symmetric to +c_smax and -c_smax, else to +c_smax and c_smin_symm                       
                                                   -- for wrapping when g_msb_clip=FALSE the g_msb_clip_symmetric is ignored, so signed wrapping is done asymmetric 
     g_gain_w              : NATURAL := 0;         -- do not use, must be 0, use negative g_lsb_w instead
@@ -88,7 +89,8 @@ BEGIN
       g_representation      => g_representation,      
       g_lsb_w               => g_lsb_w,               
       g_lsb_round           => g_lsb_round,           
-      g_lsb_round_clip      => g_lsb_round_clip,      
+      g_lsb_round_clip      => g_lsb_round_clip,
+      g_lsb_round_even      => g_lsb_round_even,
       g_msb_clip            => g_msb_clip,            
       g_msb_clip_symmetric  => g_msb_clip_symmetric,
       g_pipeline_remove_lsb => g_pipeline_remove_lsb, 
@@ -113,7 +115,8 @@ BEGIN
       g_representation      => g_representation,     
       g_lsb_w               => g_lsb_w,              
       g_lsb_round           => g_lsb_round,          
-      g_lsb_round_clip      => g_lsb_round_clip,     
+      g_lsb_round_clip      => g_lsb_round_clip,
+      g_lsb_round_even      => g_lsb_round_even,
       g_msb_clip            => g_msb_clip,           
       g_msb_clip_symmetric  => g_msb_clip_symmetric, 
       g_pipeline_remove_lsb => g_pipeline_remove_lsb,
@@ -133,7 +136,8 @@ BEGIN
       g_representation      => g_representation,      
       g_lsb_w               => g_lsb_w,               
       g_lsb_round           => g_lsb_round,           
-      g_lsb_round_clip      => g_lsb_round_clip,      
+      g_lsb_round_clip      => g_lsb_round_clip,
+      g_lsb_round_even      => g_lsb_round_even,
       g_msb_clip            => g_msb_clip,            
       g_msb_clip_symmetric  => g_msb_clip_symmetric,  
       g_pipeline_remove_lsb => g_pipeline_remove_lsb,