mkurc-ant
commented
4 years ago I've tried to lint the top.net xml using xmllint and it succeeded. Next, I've tried to query the XPath (part of it) and this is what i got:
> xmllint --huge --xpath //block[@instance='inpad[0]'] top.net
XPath error : Memory allocation failed : growing nodeset hit limit
growing nodeset hit limit
^
XPath evaluation failureIt seems that the libxml has hard time using XPath for such a huge XML file (~330MB). The python wrapper simply misinterprets the error and throws the lxml.etree.XPathEvalError exception even though the XPath itself is correct.
The xmllint I used is built with:
xmllint: using libxml version 20904
compiled with: Threads Tree Output Push Reader Patterns Writer SAXv1 FTP HTTP DTDValid HTML Legacy C14N Catalog XPath XPointer XInclude Iconv ICU ISO8859X Unicode Regexps Automata Expr Schemas Schematron Modules Debug Zlib LzmaI need to double check that against the version of libxml that we use in SymbiFlow.
@rw1nkler For now try applying this patch to utils/vpr_io_place.py, this one works by querying all blocks and filtering them in python:
diff --git a/utils/vpr_io_place.py b/utils/vpr_io_place.py
index c31fbd7d..5da0e2d8 100644
--- a/utils/vpr_io_place.py
+++ b/utils/vpr_io_place.py
@@ -56,9 +56,11 @@ class IoPlace(object):
net_root = net_xml.getroot()
self.net_to_block = {}
- for block in net_root.xpath(
- "//block[@instance='inpad[0]'] | //block[@instance='outpad[0]']"
- ):
+ for block in net_root.xpath("//block"):
+ instance = block.attrib["instance"]
+ if instance != "inpad[0]" and instance != "outpad[0]":
+ continue
+
top_block = block.getparent()
assert top_block is not None
while top_block.getparent() is not net_root:
rw1nkler
tcal-x
I believe that all four peaks came from the 
litghost
HackerFoo
Here is the branch with the current progress on OpenTitan support: https://github.com/antmicro/symbiflow-arch-defs/tree/opentitan_earlgray
Currently, I'm struggling with the error in
vpr_io_place.py:However, the same XPath expression works for other designs like button or counter on nexys video. I think that the error is in the wrong
.netor.ebliffile itself. Maybe due to unsupported elements of the design or wrong import in previous importing scripts.