From: Michael Nolan <mtnolan2640@gmail.com>
Date: Wed, 12 Feb 2020 19:12:48 +0000 (-0500)
Subject: Eliminate unused entries in shift matrix
X-Git-Tag: ls180-24jan2020~184
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=439794049b8a53cdb67cdf477c61634eca8886db;p=ieee754fpu.git

Eliminate unused entries in shift matrix
---

diff --git a/src/ieee754/part_shift/part_shift_dynamic.py b/src/ieee754/part_shift/part_shift_dynamic.py
index 97be1118..f67bdd6e 100644
--- a/src/ieee754/part_shift/part_shift_dynamic.py
+++ b/src/ieee754/part_shift/part_shift_dynamic.py
@@ -69,7 +69,8 @@ class PartitionedDynamicShift(Elaboratable):
         # actually calculate the shift-partials here
         for i, b in enumerate(b_intervals):
             start = 0
-            for j, a in enumerate(a_intervals):
+            for j in range(i, len(a_intervals)):
+                a = a_intervals[j]
                 end = keys[i]
                 result_width = matrix[i][j].width
                 bwidth = math.ceil(math.log2(result_width + 1))