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verilogParse.py
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#
# verilogParse.py
#
# an example of using the pyparsing module to be able to process Verilog files
# uses BNF defined at http://www.verilog.com/VerilogBNF.html
#
# Copyright (c) 2004-2011 Paul T. McGuire. All rights reserved.
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# If you find this software to be useful, please make a donation to one
# of the following charities:
# - the Red Cross (http://www.redcross.org)
# - Hospice Austin (http://www.hospiceaustin.org)
#
# DISCLAIMER:
# THIS SOFTWARE IS PROVIDED BY PAUL T. McGUIRE ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
# EVENT SHALL PAUL T. McGUIRE OR CO-CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
# INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OFUSE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
# OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
# EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# For questions or inquiries regarding this license, or commercial use of
# this software, contact the author via e-mail: ptmcg@users.sourceforge.net
#
# Todo:
# - add pre-process pass to implement compilerDirectives (ifdef, include, etc.)
#
# Revision History:
#
# 1.0 - Initial release
# 1.0.1 - Fixed grammar errors:
# . real declaration was incorrect
# . tolerant of '=>' for '*>' operator
# . tolerant of '?' as hex character
# . proper handling of mintypmax_expr within path delays
# 1.0.2 - Performance tuning (requires pyparsing 1.3)
# 1.0.3 - Performance updates, using Regex (requires pyparsing 1.4)
# 1.0.4 - Performance updates, enable packrat parsing (requires pyparsing 1.4.2)
# 1.0.5 - Converted keyword Literals to Keywords, added more use of Group to
# group parsed results tokens
# 1.0.6 - Added support for module header with no ports list (thanks, Thomas Dejanovic!)
# 1.0.7 - Fixed erroneous '<<' Forward definition in timCheckCond, omitting ()'s
# 1.0.8 - Re-released under MIT license
# 1.0.9 - Enhanced udpInstance to handle identifiers with leading '\' and subscripting
# 1.0.10 - Fixed change added in 1.0.9 to work for all identifiers, not just those used
# for udpInstance.
#
import pdb
import time
import pprint
import sys
__version__ = "1.0.10"
from pyparsing import Literal, CaselessLiteral, Keyword, Word, Upcase, OneOrMore, ZeroOrMore, \
Forward, NotAny, delimitedList, Group, Optional, Combine, alphas, nums, restOfLine, cStyleComment, \
alphanums, printables, dblQuotedString, empty, ParseException, ParseResults, MatchFirst, oneOf, GoToColumn, \
ParseResults,StringEnd, FollowedBy, ParserElement, And, Regex, cppStyleComment#,__version__
import pyparsing
usePackrat = True
usePsyco = False
packratOn = False
psycoOn = False
if usePackrat:
try:
ParserElement.enablePackrat()
except:
pass
else:
packratOn = True
# comment out this section to disable psyco function compilation
if usePsyco:
try:
import psyco
psyco.full()
except:
print "failed to import psyco Python optimizer"
else:
psycoOn = True
def dumpTokens(s,l,t):
import pprint
pprint.pprint( t.asList() )
module = None
def parseModule(s,l,t):
import Module
global module
module = Module.Module({"name": t[0]})
def parsePort(s,l,t,port):
global module
width=1
idx=1
# handle optional size declaration
if t[1] == '[':
width = int(t[2])-int(t[4])+1
idx = 6
token = t[idx]
# handle possibly many signal declarations
while token != ';':
if token == 'clk' or token == 'CLK' or token == 'Clk':
import PortClk
if width != 1:
raise Exception("Expect clock signal " + token + " to have width=1, not " + str(width))
module.add_port(PortClk.PortClk({ "name":token, "module":module, "busMember":False, "bitIdx":None, "busName":None } ))
elif token != ',':
if width == 1:
module.add_port(port({ "name":token, "width":width, "module":module, "busMember":False, "bitIdx":None, "busName":None }))
else:
# account for multi-bit ports by adding a new port for each bit
for i in range( 0, width ):
module.add_port(port({ "name":token + "[" + str(i) + "]", "width": 1, "module":module, "busMember":True, "bitIdx":i, "busName":token }))
#
idx += 1
token = t[idx]
def parseInput(s,l,t):
import PortIn
if t[0][0] != 'input':
raise Exception("Expected input identifier")
parsePort(s,l,t[0],PortIn.PortIn)
def parseOutput(s,l,t):
import PortOut
if t[0][0] != 'output':
raise Exception("Expected output identifier")
parsePort(s,l,t[0],PortOut.PortOut)
def parseSubmod(s,l,t):
import Cell
t = t[0]
global module
submodname = t[0]
if t[1][0][0] == "#":
raise Exception("This cell might have parameters? " + str(t[1][0]))
name = t[1][0][0]
cell = module.new_cell({ "name" : name, "submodname": submodname })
for tok in t[1][1]:
# look for pin-connections
if tok != '(' and tok != ')':
if len(tok) != 4:
raise Exception("Expected this to have length 4")
netName = tok[2][0]
isBus = False
if len(tok[2]) > 1:
# account for possible bit select (eg [0])
busName = netName
bitIdx = tok[2][1][1]
netName += "[" + str( bitIdx ) + "]"
isBus = True
if netName in module.ports:
net = module.ports.get(netName)
elif netName in module.nets:
net = module.nets.get(netName)
else:
if isBus:
net = module.new_net({ "name":netName, "width":1, "busMember":True, "bitIdx":bitIdx, "busName":busName })
else:
try:
net = module.new_net({ "name":netName, "width":1, "busMember":False, "bitIdx":None, "busName":None })
except:
print 'tok =', tok
print 'netName =', netName
print 'isBus =', isBus
raise
#
tmp = tok[0].split('.')
if len(tmp) != 2:
raise Exception("Bad pin decl " + str(tmp))
pinName = tmp[1]
pin = cell.new_pin({"name":pinName, "portname":pinName})
pin.connectNet(net)
verilogbnf = None
def Verilog_BNF():
global verilogbnf
if verilogbnf is None:
# compiler directives
compilerDirective = Combine( "`" + \
oneOf("define undef ifdef else endif default_nettype "
"include resetall timescale unconnected_drive "
"nounconnected_drive celldefine endcelldefine") + \
restOfLine ).setName("compilerDirective")
# primitives
semi = Literal(";")
lpar = Literal("(")
rpar = Literal(")")
equals = Literal("=")
identLead = alphas+"$_"
identBody = alphanums+"$_"
identifier1 = Regex( r"\.?["+identLead+"]["+identBody+"]*(\.["+identLead+"]["+identBody+"]*)*"
).setName("baseIdent")
identifier2 = Regex(r"\\\S+").setParseAction(lambda t:t[0][1:]).setName("escapedIdent")
identifier = identifier1 | identifier2
hexnums = nums + "abcdefABCDEF" + "_?"
base = Regex("'[bBoOdDhH]").setName("base")
basedNumber = Combine( Optional( Word(nums + "_") ) + base + Word(hexnums+"xXzZ"),
joinString=" ", adjacent=False ).setName("basedNumber")
#~ number = ( basedNumber | Combine( Word( "+-"+spacedNums, spacedNums ) +
#~ Optional( "." + Optional( Word( spacedNums ) ) ) +
#~ Optional( e + Word( "+-"+spacedNums, spacedNums ) ) ).setName("numeric") )
number = ( basedNumber | \
Regex(r"[+-]?[0-9_]+(\.[0-9_]*)?([Ee][+-]?[0-9_]+)?") \
).setName("numeric")
#~ decnums = nums + "_"
#~ octnums = "01234567" + "_"
expr = Forward().setName("expr")
concat = Group( "{" + delimitedList( expr ) + "}" )
multiConcat = Group("{" + expr + concat + "}").setName("multiConcat")
funcCall = Group(identifier + "(" + Optional( delimitedList( expr ) ) + ")").setName("funcCall")
subscrRef = Group("[" + delimitedList( expr, ":" ) + "]")
subscrIdentifier = Group( identifier + Optional( subscrRef ) )
#~ scalarConst = "0" | (( FollowedBy('1') + oneOf("1'b0 1'b1 1'bx 1'bX 1'B0 1'B1 1'Bx 1'BX 1") ))
scalarConst = Regex("0|1('[Bb][01xX])?")
mintypmaxExpr = Group( expr + ":" + expr + ":" + expr ).setName("mintypmax")
primary = (
number |
("(" + mintypmaxExpr + ")" ) |
( "(" + Group(expr) + ")" ).setName("nestedExpr") | #.setDebug() |
multiConcat |
concat |
dblQuotedString |
funcCall |
subscrIdentifier
)
unop = oneOf( "+ - ! ~ & ~& | ^| ^ ~^" ).setName("unop")
binop = oneOf( "+ - * / % == != === !== && "
"|| < <= > >= & | ^ ^~ >> << ** <<< >>>" ).setName("binop")
expr << (
( unop + expr ) | # must be first!
( primary + "?" + expr + ":" + expr ) |
( primary + Optional( binop + expr ) )
)
lvalue = subscrIdentifier | concat
# keywords
if_ = Keyword("if")
else_ = Keyword("else")
edge = Keyword("edge")
posedge = Keyword("posedge")
negedge = Keyword("negedge")
specify = Keyword("specify")
endspecify = Keyword("endspecify")
fork = Keyword("fork")
join = Keyword("join")
begin = Keyword("begin")
end = Keyword("end")
default = Keyword("default")
forever = Keyword("forever")
repeat = Keyword("repeat")
while_ = Keyword("while")
for_ = Keyword("for")
case = oneOf( "case casez casex" )
endcase = Keyword("endcase")
wait = Keyword("wait")
disable = Keyword("disable")
deassign = Keyword("deassign")
force = Keyword("force")
release = Keyword("release")
assign = Keyword("assign")
eventExpr = Forward()
eventTerm = ( posedge + expr ) | ( negedge + expr ) | expr | ( "(" + eventExpr + ")" )
eventExpr << (
Group( delimitedList( eventTerm, "or" ) )
)
eventControl = Group( "@" + ( ( "(" + eventExpr + ")" ) | identifier | "*" ) ).setName("eventCtrl")
delayArg = ( number |
Word(alphanums+"$_") | #identifier |
( "(" + Group( delimitedList( mintypmaxExpr | expr ) ) + ")" )
).setName("delayArg")#.setDebug()
delay = Group( "#" + delayArg ).setName("delay")#.setDebug()
delayOrEventControl = delay | eventControl
assgnmt = Group( lvalue + "=" + Optional( delayOrEventControl ) + expr ).setName( "assgnmt" )
nbAssgnmt = Group(( lvalue + "<=" + Optional( delay ) + expr ) |
( lvalue + "<=" + Optional( eventControl ) + expr )).setName( "nbassgnmt" )
range = "[" + expr + ":" + expr + "]"
paramAssgnmt = Group( identifier + "=" + expr ).setName("paramAssgnmt")
parameterDecl = Group( "parameter" + Optional( range ) + delimitedList( paramAssgnmt ) + semi).setName("paramDecl")
inputDecl = Group( "input" + Optional( range ) + delimitedList( identifier ) + semi ).setParseAction(parseInput)
outputDecl = Group( "output" + Optional( range ) + delimitedList( identifier ) + semi ).setParseAction(parseOutput)
inoutDecl = Group( "inout" + Optional( range ) + delimitedList( identifier ) + semi )
regIdentifier = Group( identifier + Optional( "[" + expr + ":" + expr + "]" ) )
regDecl = Group( "reg" + Optional("signed") + Optional( range ) + delimitedList( regIdentifier ) + semi ).setName("regDecl")
timeDecl = Group( "time" + delimitedList( regIdentifier ) + semi )
integerDecl = Group( "integer" + delimitedList( regIdentifier ) + semi )
strength0 = oneOf("supply0 strong0 pull0 weak0 highz0")
strength1 = oneOf("supply1 strong1 pull1 weak1 highz1")
driveStrength = Group( "(" + ( ( strength0 + "," + strength1 ) |
( strength1 + "," + strength0 ) ) + ")" ).setName("driveStrength")
nettype = oneOf("wire tri tri1 supply0 wand triand tri0 supply1 wor trior trireg")
expandRange = Optional( oneOf("scalared vectored") ) + range
realDecl = Group( "real" + delimitedList( identifier ) + semi )
eventDecl = Group( "event" + delimitedList( identifier ) + semi )
blockDecl = (
parameterDecl |
regDecl |
integerDecl |
realDecl |
timeDecl |
eventDecl
)
stmt = Forward().setName("stmt")#.setDebug()
stmtOrNull = stmt | semi
caseItem = ( delimitedList( expr ) + ":" + stmtOrNull ) | \
( default + Optional(":") + stmtOrNull )
stmt << Group(
( begin + Group( ZeroOrMore( stmt ) ) + end ).setName("begin-end") |
( if_ + Group("(" + expr + ")") + stmtOrNull + Optional( else_ + stmtOrNull ) ).setName("if") |
( delayOrEventControl + stmtOrNull ) |
( case + "(" + expr + ")" + OneOrMore( caseItem ) + endcase ) |
( forever + stmt ) |
( repeat + "(" + expr + ")" + stmt ) |
( while_ + "(" + expr + ")" + stmt ) |
( for_ + "(" + assgnmt + semi + Group( expr ) + semi + assgnmt + ")" + stmt ) |
( fork + ZeroOrMore( stmt ) + join ) |
( fork + ":" + identifier + ZeroOrMore( blockDecl ) + ZeroOrMore( stmt ) + end ) |
( wait + "(" + expr + ")" + stmtOrNull ) |
( "->" + identifier + semi ) |
( disable + identifier + semi ) |
( assign + assgnmt + semi ) |
( deassign + lvalue + semi ) |
( force + assgnmt + semi ) |
( release + lvalue + semi ) |
( begin + ":" + identifier + ZeroOrMore( blockDecl ) + ZeroOrMore( stmt ) + end ).setName("begin:label-end") |
# these *have* to go at the end of the list!!!
( assgnmt + semi ) |
( nbAssgnmt + semi ) |
( Combine( Optional("$") + identifier ) + Optional( "(" + delimitedList(expr|empty) + ")" ) + semi )
).setName("stmtBody")
"""
x::=<blocking_assignment> ;
x||= <non_blocking_assignment> ;
x||= if ( <expression> ) <statement_or_null>
x||= if ( <expression> ) <statement_or_null> else <statement_or_null>
x||= case ( <expression> ) <case_item>+ endcase
x||= casez ( <expression> ) <case_item>+ endcase
x||= casex ( <expression> ) <case_item>+ endcase
x||= forever <statement>
x||= repeat ( <expression> ) <statement>
x||= while ( <expression> ) <statement>
x||= for ( <assignment> ; <expression> ; <assignment> ) <statement>
x||= <delay_or_event_control> <statement_or_null>
x||= wait ( <expression> ) <statement_or_null>
x||= -> <name_of_event> ;
x||= <seq_block>
x||= <par_block>
x||= <task_enable>
x||= <system_task_enable>
x||= disable <name_of_task> ;
x||= disable <name_of_block> ;
x||= assign <assignment> ;
x||= deassign <lvalue> ;
x||= force <assignment> ;
x||= release <lvalue> ;
"""
alwaysStmt = Group( "always" + Optional(eventControl) + stmt ).setName("alwaysStmt")
initialStmt = Group( "initial" + stmt ).setName("initialStmt")
chargeStrength = Group( "(" + oneOf( "small medium large" ) + ")" ).setName("chargeStrength")
continuousAssign = Group(
assign + Optional( driveStrength ) + Optional( delay ) + delimitedList( assgnmt ) + semi
).setName("continuousAssign")
tfDecl = (
parameterDecl |
inputDecl |
outputDecl |
inoutDecl |
regDecl |
timeDecl |
integerDecl |
realDecl
)
functionDecl = Group(
"function" + Optional( range | "integer" | "real" ) + identifier + semi +
Group( OneOrMore( tfDecl ) ) +
Group( ZeroOrMore( stmt ) ) +
"endfunction"
)
inputOutput = oneOf("input output")
netDecl1Arg = ( nettype +
Optional( expandRange ) +
Optional( delay ) +
Group( delimitedList( identifier ) ) )
#Group( delimitedList( ~inputOutput + identifier ) ) )
netDecl2Arg = ( "trireg" +
Optional( chargeStrength ) +
Optional( expandRange ) +
Optional( delay ) +
Group( delimitedList( identifier ) ) )
# Group( delimitedList( ~inputOutput + identifier ) ) )
netDecl3Arg = ( nettype +
Optional( driveStrength ) +
Optional( expandRange ) +
Optional( delay ) +
Group( delimitedList( assgnmt ) ) )
netDecl1 = Group(netDecl1Arg + semi)
netDecl2 = Group(netDecl2Arg + semi)
netDecl3 = Group(netDecl3Arg + semi)
gateType = oneOf("and nand or nor xor xnor buf bufif0 bufif1 "
"not notif0 notif1 pulldown pullup nmos rnmos "
"pmos rpmos cmos rcmos tran rtran tranif0 "
"rtranif0 tranif1 rtranif1" )
gateInstance = Optional( Group( identifier + Optional( range ) ) ) + \
"(" + Group( delimitedList( expr ) ) + ")"
gateDecl = Group( gateType +
Optional( driveStrength ) +
Optional( delay ) +
delimitedList( gateInstance) +
semi )
udpInstance = Group( Group( identifier + Optional(range | subscrRef) ) +
"(" + Group( delimitedList( expr ) ) + ")" )
udpInstantiation = Group( identifier -
Optional( driveStrength ) +
Optional( delay ) +
delimitedList( udpInstance ) +
semi ).setName("udpInstantiation")#.setParseAction(dumpTokens).setDebug()
parameterValueAssignment = Group( Literal("#") + "(" + Group( delimitedList( expr ) ) + ")" )
namedPortConnection = Group( "." + identifier + "(" + expr + ")" )
modulePortConnection = expr | empty
#~ moduleInstance = Group( Group ( identifier + Optional(range) ) +
#~ ( delimitedList( modulePortConnection ) |
#~ delimitedList( namedPortConnection ) ) )
inst_args = Group( "(" + (delimitedList( modulePortConnection ) |
delimitedList( namedPortConnection )) + ")").setName("inst_args")#.setDebug()
moduleInstance = Group( Group ( identifier + Optional(range) ) + inst_args )
moduleInstantiation = Group( identifier +
Optional( parameterValueAssignment ) +
delimitedList( moduleInstance ).setName("moduleInstanceList") +
semi ).setName("moduleInstantiation").setParseAction(parseSubmod)
parameterOverride = Group( "defparam" + delimitedList( paramAssgnmt ) + semi )
task = Group( "task" + identifier + semi +
ZeroOrMore( tfDecl ) +
stmtOrNull +
"endtask" )
specparamDecl = Group( "specparam" + delimitedList( paramAssgnmt ) + semi )
pathDescr1 = Group( "(" + subscrIdentifier + "=>" + subscrIdentifier + ")" )
pathDescr2 = Group( "(" + Group( delimitedList( subscrIdentifier ) ) + "*>" +
Group( delimitedList( subscrIdentifier ) ) + ")" )
pathDescr3 = Group( "(" + Group( delimitedList( subscrIdentifier ) ) + "=>" +
Group( delimitedList( subscrIdentifier ) ) + ")" )
pathDelayValue = Group( ( "(" + Group( delimitedList( mintypmaxExpr | expr ) ) + ")" ) |
mintypmaxExpr |
expr )
pathDecl = Group( ( pathDescr1 | pathDescr2 | pathDescr3 ) + "=" + pathDelayValue + semi ).setName("pathDecl")
portConditionExpr = Forward()
portConditionTerm = Optional(unop) + subscrIdentifier
portConditionExpr << portConditionTerm + Optional( binop + portConditionExpr )
polarityOp = oneOf("+ -")
levelSensitivePathDecl1 = Group(
if_ + Group("(" + portConditionExpr + ")") +
subscrIdentifier + Optional( polarityOp ) + "=>" + subscrIdentifier + "=" +
pathDelayValue +
semi )
levelSensitivePathDecl2 = Group(
if_ + Group("(" + portConditionExpr + ")") +
lpar + Group( delimitedList( subscrIdentifier ) ) + Optional( polarityOp ) + "*>" +
Group( delimitedList( subscrIdentifier ) ) + rpar + "=" +
pathDelayValue +
semi )
levelSensitivePathDecl = levelSensitivePathDecl1 | levelSensitivePathDecl2
edgeIdentifier = posedge | negedge
edgeSensitivePathDecl1 = Group(
Optional( if_ + Group("(" + expr + ")") ) +
lpar + Optional( edgeIdentifier ) +
subscrIdentifier + "=>" +
lpar + subscrIdentifier + Optional( polarityOp ) + ":" + expr + rpar + rpar +
"=" +
pathDelayValue +
semi )
edgeSensitivePathDecl2 = Group(
Optional( if_ + Group("(" + expr + ")") ) +
lpar + Optional( edgeIdentifier ) +
subscrIdentifier + "*>" +
lpar + delimitedList( subscrIdentifier ) + Optional( polarityOp ) + ":" + expr + rpar + rpar +
"=" +
pathDelayValue +
semi )
edgeSensitivePathDecl = edgeSensitivePathDecl1 | edgeSensitivePathDecl2
edgeDescr = oneOf("01 10 0x x1 1x x0").setName("edgeDescr")
timCheckEventControl = Group( posedge | negedge | (edge + "[" + delimitedList( edgeDescr ) + "]" ))
timCheckCond = Forward()
timCondBinop = oneOf("== === != !==")
timCheckCondTerm = ( expr + timCondBinop + scalarConst ) | ( Optional("~") + expr )
timCheckCond << ( ( "(" + timCheckCond + ")" ) | timCheckCondTerm )
timCheckEvent = Group( Optional( timCheckEventControl ) +
subscrIdentifier +
Optional( "&&&" + timCheckCond ) )
timCheckLimit = expr
controlledTimingCheckEvent = Group( timCheckEventControl + subscrIdentifier +
Optional( "&&&" + timCheckCond ) )
notifyRegister = identifier
systemTimingCheck1 = Group( "$setup" +
lpar + timCheckEvent + "," + timCheckEvent + "," + timCheckLimit +
Optional( "," + notifyRegister ) + rpar +
semi )
systemTimingCheck2 = Group( "$hold" +
lpar + timCheckEvent + "," + timCheckEvent + "," + timCheckLimit +
Optional( "," + notifyRegister ) + rpar +
semi )
systemTimingCheck3 = Group( "$period" +
lpar + controlledTimingCheckEvent + "," + timCheckLimit +
Optional( "," + notifyRegister ) + rpar +
semi )
systemTimingCheck4 = Group( "$width" +
lpar + controlledTimingCheckEvent + "," + timCheckLimit +
Optional( "," + expr + "," + notifyRegister ) + rpar +
semi )
systemTimingCheck5 = Group( "$skew" +
lpar + timCheckEvent + "," + timCheckEvent + "," + timCheckLimit +
Optional( "," + notifyRegister ) + rpar +
semi )
systemTimingCheck6 = Group( "$recovery" +
lpar + controlledTimingCheckEvent + "," + timCheckEvent + "," + timCheckLimit +
Optional( "," + notifyRegister ) + rpar +
semi )
systemTimingCheck7 = Group( "$setuphold" +
lpar + timCheckEvent + "," + timCheckEvent + "," + timCheckLimit + "," + timCheckLimit +
Optional( "," + notifyRegister ) + rpar +
semi )
systemTimingCheck = (FollowedBy('$') + ( systemTimingCheck1 | systemTimingCheck2 | systemTimingCheck3 |
systemTimingCheck4 | systemTimingCheck5 | systemTimingCheck6 | systemTimingCheck7 )).setName("systemTimingCheck")
sdpd = if_ + Group("(" + expr + ")") + \
( pathDescr1 | pathDescr2 ) + "=" + pathDelayValue + semi
specifyItem = ~Keyword("endspecify") +(
specparamDecl |
pathDecl |
levelSensitivePathDecl |
edgeSensitivePathDecl |
systemTimingCheck |
sdpd
)
"""
x::= <specparam_declaration>
x||= <path_declaration>
x||= <level_sensitive_path_declaration>
x||= <edge_sensitive_path_declaration>
x||= <system_timing_check>
x||= <sdpd>
"""
specifyBlock = Group( "specify" + ZeroOrMore( specifyItem ) + "endspecify" )
moduleItem = ~Keyword("endmodule") + (
parameterDecl |
inputDecl |
outputDecl |
inoutDecl |
regDecl |
netDecl3 |
netDecl1 |
netDecl2 |
timeDecl |
integerDecl |
realDecl |
eventDecl |
gateDecl |
parameterOverride |
continuousAssign |
specifyBlock |
initialStmt |
alwaysStmt |
task |
functionDecl |
# these have to be at the end - they start with identifiers
moduleInstantiation |
udpInstantiation
)
""" All possible moduleItems, from Verilog grammar spec
x::= <parameter_declaration>
x||= <input_declaration>
x||= <output_declaration>
x||= <inout_declaration>
?||= <net_declaration> (spec does not seem consistent for this item)
x||= <reg_declaration>
x||= <time_declaration>
x||= <integer_declaration>
x||= <real_declaration>
x||= <event_declaration>
x||= <gate_declaration>
x||= <UDP_instantiation>
x||= <module_instantiation>
x||= <parameter_override>
x||= <continuous_assign>
x||= <specify_block>
x||= <initial_statement>
x||= <always_statement>
x||= <task>
x||= <function>
"""
portRef = subscrIdentifier
portExpr = portRef | Group( "{" + delimitedList( portRef ) + "}" )
port = portExpr | Group( ( "." + identifier + "(" + portExpr + ")" ) )
moduleHdr = Group ( oneOf("module macromodule") + identifier("moduleName").setParseAction(parseModule) +
Optional( "(" + Group( Optional( delimitedList(
Group(oneOf("input output") +
(netDecl1Arg | netDecl2Arg | netDecl3Arg) ) |
port ) ) ) +
")" ) + semi ).setName("moduleHdr")
module = Group( moduleHdr +
Group( ZeroOrMore( moduleItem ) ) +
"endmodule" ).setName("module")#.setDebug()
udpDecl = outputDecl | inputDecl | regDecl
#~ udpInitVal = oneOf("1'b0 1'b1 1'bx 1'bX 1'B0 1'B1 1'Bx 1'BX 1 0 x X")
udpInitVal = (Regex("1'[bB][01xX]") | Regex("[01xX]")).setName("udpInitVal")
udpInitialStmt = Group( "initial" +
identifier + "=" + udpInitVal + semi ).setName("udpInitialStmt")
levelSymbol = oneOf("0 1 x X ? b B")
levelInputList = Group( OneOrMore( levelSymbol ).setName("levelInpList") )
outputSymbol = oneOf("0 1 x X")
combEntry = Group( levelInputList + ":" + outputSymbol + semi )
edgeSymbol = oneOf("r R f F p P n N *")
edge = Group( "(" + levelSymbol + levelSymbol + ")" ) | \
Group( edgeSymbol )
edgeInputList = Group( ZeroOrMore( levelSymbol ) + edge + ZeroOrMore( levelSymbol ) )
inputList = levelInputList | edgeInputList
seqEntry = Group( inputList + ":" + levelSymbol + ":" + ( outputSymbol | "-" ) + semi ).setName("seqEntry")
udpTableDefn = Group( "table" +
OneOrMore( combEntry | seqEntry ) +
"endtable" ).setName("table")
"""
<UDP>
::= primitive <name_of_UDP> ( <name_of_variable> <,<name_of_variable>>* ) ;
<UDP_declaration>+
<UDP_initial_statement>?
<table_definition>
endprimitive
"""
udp = Group( "primitive" + identifier +
"(" + Group( delimitedList( identifier ) ) + ")" + semi +
OneOrMore( udpDecl ) +
Optional( udpInitialStmt ) +
udpTableDefn +
"endprimitive" )
verilogbnf = OneOrMore( module | udp ) + StringEnd()
verilogbnf.ignore( cppStyleComment )
verilogbnf.ignore( compilerDirective )
return verilogbnf
def test( strng ):
tokens = []
try:
tokens = Verilog_BNF().parseString( strng )
except ParseException, err:
print err.line
print " "*(err.column-1) + "^"
print err
return tokens
def parseFile(fileName):
tokens = []
try:
tokens = Verilog_BNF().parseFile( fileName )
except ParseException, err:
print err.line
print " "*(err.column-1) + "^"
print err
#tokens = []
#numlines = 0
#totalTime = 0
#infile = file(fileName)
#filelines = infile.readlines()
#infile.close()
#print fileName, len(filelines),
#numlines += len(filelines)
#teststr = "".join(filelines)
#time1 = time.clock()
#tokens = test( teststr )
#time2 = time.clock()
#elapsed = time2-time1
#totalTime += elapsed
#if ( len( tokens ) ):
# print "OK", elapsed
return module
#~ if __name__ == "__main__":
#if 0:
# import pprint
# toptest = """
# module TOP( in, out );
# input [7:0] in;
# output [5:0] out;
# COUNT_BITS8 count_bits( .IN( in ), .C( out ) );
# endmodule"""
# pprint.pprint( test(toptest).asList() )
#
#else:
# def main():
# print "Verilog parser test (V %s)" % __version__
# print " - using pyparsing version", pyparsing.__version__
# print " - using Python version", sys.version
# if packratOn: print " - using packrat parsing"
# if psycoOn: print " - using psyco runtime optimization"
# print
#
# import os
# import gc
#
# failCount = 0
# Verilog_BNF()
# numlines = 0
# startTime = time.clock()
# fileDir = "."
# #~ fileDir = "verilog/new"
# #~ fileDir = "verilog/new2"
# #~ fileDir = "verilog/new3"
# allFiles = filter( lambda f : f.endswith(".v"), os.listdir(fileDir) )
# #~ allFiles = [ "list_path_delays_test.v" ]
# #~ allFiles = filter( lambda f : f.startswith("a") and f.endswith(".v"), os.listdir(fileDir) )
# #~ allFiles = filter( lambda f : f.startswith("c") and f.endswith(".v"), os.listdir(fileDir) )
# #~ allFiles = [ "ff.v" ]
#
# pp = pprint.PrettyPrinter( indent=2 )
# totalTime = 0
# for vfile in allFiles:
# gc.collect()
# fnam = fileDir + "/"+vfile
# infile = file(fnam)
# filelines = infile.readlines()
# infile.close()
# print fnam, len(filelines),
# numlines += len(filelines)
# teststr = "".join(filelines)
# time1 = time.clock()
# tokens = test( teststr )
# pdb.set_trace()
# time2 = time.clock()
# elapsed = time2-time1
# totalTime += elapsed
# if ( len( tokens ) ):
# print "OK", elapsed
# #~ print "tokens="
# #~ pp.pprint( tokens.asList() )
# #~ print
#
# ofnam = fileDir + "/parseOutput/" + vfile + ".parsed.txt"
# outfile = file(ofnam,"w")
# outfile.write( teststr )
# outfile.write("\n")
# outfile.write("\n")
# outfile.write(pp.pformat(tokens.asList()))
# outfile.write("\n")
# outfile.close()
# else:
# print "failed", elapsed
# failCount += 1
# endTime = time.clock()
# print "Total parse time:", totalTime
# print "Total source lines:", numlines
# print "Average lines/sec:", ( "%.1f" % (float(numlines)/(totalTime+.05 ) ) )
# if failCount:
# print "FAIL - %d files failed to parse" % failCount
# else:
# print "SUCCESS - all files parsed"
#
# return 0
#
# #~ from line_profiler import LineProfiler
# #~ from pyparsing import ParseResults
# #~ lp = LineProfiler(ParseResults.__init__)
#
# main()
#
# #~ lp.print_stats()
# #~ import hotshot
# #~ p = hotshot.Profile("vparse.prof",1,1)
# #~ p.start()
# #~ main()
# #~ p.stop()
# #~ p.close()