From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Sat, 16 Feb 2019 09:14:26 +0000 (+0000)
Subject: create put_z function
X-Git-Tag: ls180-24jan2020~1960
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=4f73a467f1f3a9bd23a393ab783ca95b5b30ef3e;p=ieee754fpu.git

create put_z function
---

diff --git a/src/add/nmigen_add_experiment.py b/src/add/nmigen_add_experiment.py
index 435fc252..a6180950 100644
--- a/src/add/nmigen_add_experiment.py
+++ b/src/add/nmigen_add_experiment.py
@@ -177,6 +177,15 @@ class FPADD:
         with m.Else():
             m.d.sync += z.create(z.s, z.e, z.m)
 
+    def put_z(self, m, z, out_z, next_state):
+        m.d.sync += [
+          out_z.stb.eq(1),
+          out_z.v.eq(z.v)
+        ]
+        with m.If(out_z.stb & out_z.ack):
+            m.d.sync += out_z.stb.eq(0)
+            m.next = next_state
+
     def get_fragment(self, platform=None):
         m = Module()
 
@@ -371,13 +380,7 @@ class FPADD:
             # put_z stage
 
             with m.State("put_z"):
-              m.d.sync += [
-                  self.out_z.stb.eq(1),
-                  self.out_z.v.eq(z.v)
-              ]
-              with m.If(self.out_z.stb & self.out_z.ack):
-                  m.d.sync += self.out_z.stb.eq(0)
-                  m.next = "get_a"
+                self.put_z(m, z, self.out_z, "get_a")
 
         return m