Implement std_mult_pipe (#1945)

tools/firrtl/generate-firrtl-with-primitives.py

@@ -17,6 +17,12 @@ def generate_replacement_map(inst):
     elif inst["name"] == "std_lsh":
         width = replacement_map["WIDTH"]
         replacement_map["BITS"] = math.ceil(math.log(width, 2)) + 1
+    elif inst["name"] == "std_mult_pipe":
+        width = replacement_map["WIDTH"]
+        replacement_map["W_SHIFTED_ONE"] = width << 1
+        replacement_map["HIGH"] = width - 1
+        replacement_map["LOW"] = 0
+
 
     return replacement_map
 

tools/firrtl/templates/std_ge.fir

@@ -3,4 +3,4 @@
         input right : UInt<WIDTH>
         output out : UInt<1>
 
-        out <= ge(left, right)
+        out <= geq(left, right)

tools/firrtl/templates/std_le.fir

@@ -3,4 +3,4 @@
         input right : UInt<WIDTH>
         output out : UInt<1>
 
-        out <= le(left, right)
+        out <= leq(left, right)

tools/firrtl/templates/std_mult_pipe.fir

@@ -0,0 +1,49 @@
+    module std_mult_pipe_WIDTH :
+        input left : UInt<WIDTH>
+        input right : UInt<WIDTH>
+        input reset : UInt<1>
+        input go : UInt<1>
+        input clk : Clock
+        output out : UInt<WIDTH>
+        output done : UInt<1>
+
+        reg rtmp : UInt<WIDTH>, clk
+        reg ltmp : UInt<WIDTH>, clk
+        reg out_tmp : UInt<W_SHIFTED_ONE>, clk
+        reg done_buf : UInt<1>[2], clk
+
+        ; Start sending the done signal.
+        when eq(go, UInt(1)):
+            done_buf[0] <= UInt(1)
+        else:
+            done_buf[0] <= UInt(0)
+
+        ; Push the done signal through the pipeline.
+        when eq(go, UInt(1)):
+            done_buf[1] <= done_buf[0]
+        else:
+            done_buf[1] <= UInt(0)
+
+        ; Register the inputs
+        when eq(reset, UInt(1)):
+            ltmp <= UInt(0)
+            rtmp <= UInt(0)
+        else:
+            when eq(go, UInt(1)):
+                ltmp <= left
+                rtmp <= right
+            else:
+                ltmp <= UInt(0)
+                rtmp <= UInt(0)
+
+        ; Compute the output and save it to out_tmp
+        when eq(reset, UInt(1)):
+            out_tmp <= UInt(0)
+        else:
+            when eq(go, UInt(1)):
+                out_tmp <= mul(ltmp, rtmp)
+            else:
+                out_tmp <= out_tmp
+
+        out <= bits(out_tmp, HIGH, LOW)
+        done <= done_buf[1]