From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Wed, 30 Sep 2020 08:45:56 +0000 (+0100)
Subject: fix read_tag to use word_select correctly
X-Git-Tag: 24jan2021_ls180~282
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=43d8b84ac86f063328f730251f9c2cd55cae6f86;p=soc.git

fix read_tag to use word_select correctly
---

diff --git a/src/soc/experiment/icache.py b/src/soc/experiment/icache.py
index 4fb56dcf..bcaf9b2e 100644
--- a/src/soc/experiment/icache.py
+++ b/src/soc/experiment/icache.py
@@ -398,7 +398,7 @@ def get_tag(addr):
 #     end;
 # Read a tag from a tag memory row
 def read_tag(way, tagset):
-    return tagset.word_select(way, TAG_WIDTH)[:TAG_BITS]
+    return tagset.word_select(way, TAG_BITS)
 
 #     -- Write a tag to tag memory row
 #     procedure write_tag(way: in way_t;
@@ -408,7 +408,7 @@ def read_tag(way, tagset):
 #     end;
 # Write a tag to tag memory row
 def write_tag(way, tagset, tag):
-    return tagset[way * TAG_BITS:(way + 1) * TAG_BITS].eq(tag)
+    return read_tag(way, tagset).eq(tag)
 
 #     -- Simple hash for direct-mapped TLB index
 #     function hash_ea(addr: std_ulogic_vector(63 downto 0))