From: Jacob Lifshay <programmerjake@gmail.com>
Date: Wed, 15 May 2024 06:21:16 +0000 (-0700)
Subject: reference/gfbm[ul/add].py: fix truncation bugs
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=0df15ec21ff37b03483f9feb94c3c86a5e2c8b0a;p=nmigen-gf.git

reference/gfbm[ul/add].py: fix truncation bugs
---

diff --git a/gf_reference/gfbmadd.py b/gf_reference/gfbmadd.py
index 5507d27..35d07a6 100644
--- a/gf_reference/gfbmadd.py
+++ b/gf_reference/gfbmadd.py
@@ -7,5 +7,5 @@ from nmigen_gf.reference.cldivrem import cldivrem
 def gfbmadd(a, b, c):
     v = clmul(a, b) ^ c
     red_poly = decode_reducing_polynomial()
-    q, r = cldivrem(v, red_poly, width=ST.XLEN + 1)
+    q, r = cldivrem(v, red_poly, width=ST.XLEN * 2 + 1)
     return r
diff --git a/gf_reference/gfbmul.py b/gf_reference/gfbmul.py
index bde8f05..57bea1c 100644
--- a/gf_reference/gfbmul.py
+++ b/gf_reference/gfbmul.py
@@ -7,5 +7,5 @@ from nmigen_gf.reference.cldivrem import cldivrem
 def gfbmul(a, b):
     product = clmul(a, b)
     red_poly = decode_reducing_polynomial()
-    q, r = cldivrem(product, red_poly, width=ST.XLEN + 1)
+    q, r = cldivrem(product, red_poly, width=ST.XLEN * 2 + 1)
     return r