From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Sat, 13 Jul 2019 08:45:25 +0000 (+0100)
Subject: add name to Overflow class, also recreate OverflowMod
X-Git-Tag: ls180-24jan2020~853
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=fced120d60faa951a2392d640c5052e17934ff4b;p=ieee754fpu.git

add name to Overflow class, also recreate OverflowMod
---

diff --git a/src/ieee754/fpcommon/fpbase.py b/src/ieee754/fpcommon/fpbase.py
index 5e086fe1..02a85424 100644
--- a/src/ieee754/fpcommon/fpbase.py
+++ b/src/ieee754/fpcommon/fpbase.py
@@ -588,11 +588,13 @@ class FPOpOut(NextControl):
 
 
 class Overflow:  # (Elaboratable):
-    def __init__(self):
-        self.guard = Signal(reset_less=True)     # tot[2]
-        self.round_bit = Signal(reset_less=True)  # tot[1]
-        self.sticky = Signal(reset_less=True)    # tot[0]
-        self.m0 = Signal(reset_less=True)        # mantissa zero bit
+    def __init__(self, name=None):
+        if name is None:
+            name = ""
+        self.guard = Signal(reset_less=True, name=name+"guard")     # tot[2]
+        self.round_bit = Signal(reset_less=True, name=name+"round") # tot[1]
+        self.sticky = Signal(reset_less=True, name=name+"sticky")   # tot[0]
+        self.m0 = Signal(reset_less=True, name=name+"m0") # mantissa bit 0
 
         #self.roundz = Signal(reset_less=True)
 
@@ -613,6 +615,26 @@ class Overflow:  # (Elaboratable):
         return self.guard & (self.round_bit | self.sticky | self.m0)
 
 
+class OverflowMod(Elaboratable, Overflow):
+    def __init__(self, name=None):
+        Overflow.__init__(self, name)
+        if name is None:
+            name = ""
+        self.roundz_out = Signal(reset_less=True, name=name+"roundz_out")
+
+    def __iter__(self):
+        yield from Overflow.__iter__(self)
+        yield self.roundz_out
+
+    def eq(self, inp):
+        return [self.roundz_out.eq(inp.roundz_out)] + Overflow.eq(self)
+
+    def elaborate(self, platform):
+        m = Module()
+        m.d.comb += self.roundz_out.eq(self.roundz)
+        return m
+
+
 class FPBase:
     """ IEEE754 Floating Point Base Class