Merged clock speed optimization work.HEADmaster

1 files changed, 13 insertions, 19 deletions

diff --git a/src/rtl/sha512_w_mem.v b/src/rtl/sha512_w_mem.v
index f4f8a1c..4aadb50 100644
--- a/src/rtl/sha512_w_mem.v
+++ b/src/rtl/sha512_w_mem.v
@@ -83,12 +83,14 @@ module sha512_w_mem(
   reg [6 : 0] w_ctr_new;
   reg         w_ctr_we;
 
+  reg [63 : 0] w_reg;
+  reg [63 : 0] w_new;
+
 
   //----------------------------------------------------------------
   // Wires.
   //----------------------------------------------------------------
   reg [63 : 0] w_tmp;
-  reg [63 : 0] w_new;
 
 
   //----------------------------------------------------------------
@@ -105,28 +107,20 @@ module sha512_w_mem(
   //----------------------------------------------------------------
   always @ (posedge clk or negedge reset_n)
     begin : reg_update
+      integer i;
+
       if (!reset_n)
         begin
-          w_mem[00]             <= 64'h0;
-          w_mem[01]             <= 64'h0;
-          w_mem[02]             <= 64'h0;
-          w_mem[03]             <= 64'h0;
-          w_mem[04]             <= 64'h0;
-          w_mem[05]             <= 64'h0;
-          w_mem[06]             <= 64'h0;
-          w_mem[07]             <= 64'h0;
-          w_mem[08]             <= 64'h0;
-          w_mem[09]             <= 64'h0;
-          w_mem[10]             <= 64'h0;
-          w_mem[11]             <= 64'h0;
-          w_mem[12]             <= 64'h0;
-          w_mem[13]             <= 64'h0;
-          w_mem[14]             <= 64'h0;
-          w_mem[15]             <= 64'h0;
-          w_ctr_reg             <= 7'h0;
+          for (i = 0 ; i < 16 ; i = i + 1)
+            w_mem[i] <= 64'h0;
+
+          w_ctr_reg <= 7'h0;
+          w_reg <= 64'h0;
         end
       else
         begin
+          w_reg <= w_new;
+
           if (w_mem_we)
             begin
               w_mem[00] <= w_mem00_new;
@@ -169,7 +163,7 @@ module sha512_w_mem(
         end
       else
         begin
-          w_tmp = w_new;
+          w_tmp = w_reg;
         end
     end // select_w