labelRE = re.compile(r'(?<!%)%\(([^\)]+)\)[sd]')
class Template(object):
- def __init__(self, t):
+ def __init__(self, parser, t):
+ self.parser = parser
self.template = t
def subst(self, d):
# Protect non-Python-dict substitutions (e.g. if there's a printf
# in the templated C++ code)
- template = protect_non_subst_percents(self.template)
+ template = self.parser.protectNonSubstPercents(self.template)
# CPU-model-specific substitutions are handled later (in GenCode).
- template = protect_cpu_symbols(template)
+ template = self.parser.protectCpuSymbols(template)
# Build a dict ('myDict') to use for the template substitution.
# Start with the template namespace. Make a copy since we're
# going to modify it.
- myDict = parser.templateMap.copy()
+ myDict = self.parser.templateMap.copy()
if isinstance(d, InstObjParams):
# If we're dealing with an InstObjParams object, we need
# CPU-specific term gets interpolated into another template or into
# an output block.
def __str__(self):
- return expand_cpu_symbols_to_string(self.template)
+ return self.parser.expandCpuSymbolsToString(self.template)
################
# Format object.
# definition.
class Format(object):
- def __init__(self, parser, id, params, code):
- self.parser = parser
+ def __init__(self, id, params, code):
self.id = id
self.params = params
label = 'def format ' + id
exec c
self.func = defInst
- def defineInst(self, name, args, lineno):
- self.parser.updateExportContext()
- context = self.parser.exportContext.copy()
+ def defineInst(self, parser, name, args, lineno):
+ parser.updateExportContext()
+ context = parser.exportContext.copy()
if len(name):
Name = name[0].upper()
if len(name) > 1:
if k not in ('header_output', 'decoder_output',
'exec_output', 'decode_block'):
del vars[k]
- return GenCode(**vars)
+ return GenCode(parser, **vars)
# Special null format to catch an implicit-format instruction
# definition outside of any format block.
def __init__(self):
self.defaultInst = ''
- def defineInst(self, name, args, lineno):
+ def defineInst(self, parser, name, args, lineno):
error(lineno,
'instruction definition "%s" with no active format!' % name)
-#####################################################################
-#
-# Support Classes
-#
-#####################################################################
-
-# Expand template with CPU-specific references into a dictionary with
-# an entry for each CPU model name. The entry key is the model name
-# and the corresponding value is the template with the CPU-specific
-# refs substituted for that model.
-def expand_cpu_symbols_to_dict(template):
- # Protect '%'s that don't go with CPU-specific terms
- t = re.sub(r'%(?!\(CPU_)', '%%', template)
- result = {}
- for cpu in cpu_models:
- result[cpu.name] = t % cpu.strings
- return result
-
-# *If* the template has CPU-specific references, return a single
-# string containing a copy of the template for each CPU model with the
-# corresponding values substituted in. If the template has no
-# CPU-specific references, it is returned unmodified.
-def expand_cpu_symbols_to_string(template):
- if template.find('%(CPU_') != -1:
- return reduce(lambda x,y: x+y,
- expand_cpu_symbols_to_dict(template).values())
- else:
- return template
-
-# Protect CPU-specific references by doubling the corresponding '%'s
-# (in preparation for substituting a different set of references into
-# the template).
-def protect_cpu_symbols(template):
- return re.sub(r'%(?=\(CPU_)', '%%', template)
-
-# Protect any non-dict-substitution '%'s in a format string
-# (i.e. those not followed by '(')
-def protect_non_subst_percents(s):
- return re.sub(r'%(?!\()', '%%', s)
-
###############
# GenCode class
#
# symbols. For the exec output, these go into the per-model
# dictionary. For all other output types they get collapsed into
# a single string.
- def __init__(self,
+ def __init__(self, parser,
header_output = '', decoder_output = '', exec_output = '',
decode_block = '', has_decode_default = False):
- self.header_output = expand_cpu_symbols_to_string(header_output)
- self.decoder_output = expand_cpu_symbols_to_string(decoder_output)
+ self.parser = parser
+ self.header_output = parser.expandCpuSymbolsToString(header_output)
+ self.decoder_output = parser.expandCpuSymbolsToString(decoder_output)
if isinstance(exec_output, dict):
self.exec_output = exec_output
elif isinstance(exec_output, str):
# If the exec_output arg is a single string, we replicate
# it for each of the CPU models, substituting and
# %(CPU_foo)s params appropriately.
- self.exec_output = expand_cpu_symbols_to_dict(exec_output)
- self.decode_block = expand_cpu_symbols_to_string(decode_block)
+ self.exec_output = parser.expandCpuSymbolsToDict(exec_output)
+ self.decode_block = parser.expandCpuSymbolsToString(decode_block)
self.has_decode_default = has_decode_default
# Override '+' operator: generate a new GenCode object that
# concatenates all the individual strings in the operands.
def __add__(self, other):
exec_output = {}
- for cpu in cpu_models:
+ for cpu in self.parser.cpuModels:
n = cpu.name
exec_output[n] = self.exec_output[n] + other.exec_output[n]
- return GenCode(self.header_output + other.header_output,
+ return GenCode(self.parser,
+ self.header_output + other.header_output,
self.decoder_output + other.decoder_output,
exec_output,
self.decode_block + other.decode_block,
self.header_output = pre + self.header_output
self.decoder_output = pre + self.decoder_output
self.decode_block = pre + self.decode_block
- for cpu in cpu_models:
+ for cpu in self.parser.cpuModels:
self.exec_output[cpu.name] = pre + self.exec_output[cpu.name]
# Wrap the decode block in a pair of strings (e.g., 'case foo:'
class OperandList(object):
'''Find all the operands in the given code block. Returns an operand
descriptor list (instance of class OperandList).'''
- def __init__(self, code):
+ def __init__(self, parser, code):
self.items = []
self.bases = {}
# delete comments so we don't match on reg specifiers inside
opClassRE = re.compile(r'.*Op|No_OpClass')
class InstObjParams(object):
- def __init__(self, mnem, class_name, base_class = '',
+ def __init__(self, parser, mnem, class_name, base_class = '',
snippets = {}, opt_args = []):
self.mnemonic = mnem
self.class_name = class_name
compositeCode = ' '.join(map(str, snippets.values()))
self.snippets = snippets
- self.operands = OperandList(compositeCode)
+ self.operands = OperandList(parser, compositeCode)
self.constructor = self.operands.concatAttrStrings('constructor')
self.constructor += \
'\n\t_numSrcRegs = %d;' % self.operands.numSrcRegs
'''
class ISAParser(Grammar):
- def __init__(self, output_dir):
+ def __init__(self, output_dir, cpu_models):
super(ISAParser, self).__init__()
self.output_dir = output_dir
+ self.cpuModels = cpu_models
+
+ # variable to hold templates
self.templateMap = {}
# This dictionary maps format name strings to Format objects.
# The default case stack.
self.defaultStack = Stack(None)
- self.exportContext = {}
+ symbols = ('makeList', 're', 'string')
+ self.exportContext = dict([(s, eval(s)) for s in symbols])
self.maxInstSrcRegs = 0
self.maxInstDestRegs = 0
# def and/or output statements.
def p_opt_defs_and_outputs_0(self, t):
'opt_defs_and_outputs : empty'
- t[0] = GenCode()
+ t[0] = GenCode(self)
def p_opt_defs_and_outputs_1(self, t):
'opt_defs_and_outputs : defs_and_outputs'
# get handled in GenCode) by doubling them first so that the
# format operation will reduce them back to single '%'s.
def process_output(self, s):
- s = protect_non_subst_percents(s)
+ s = self.protectNonSubstPercents(s)
# protects cpu-specific symbols too
- s = protect_cpu_symbols(s)
+ s = self.protectCpuSymbols(s)
return substBitOps(s % self.templateMap)
def p_output_header(self, t):
'output_header : OUTPUT HEADER CODELIT SEMI'
- t[0] = GenCode(header_output = self.process_output(t[3]))
+ t[0] = GenCode(self, header_output = self.process_output(t[3]))
def p_output_decoder(self, t):
'output_decoder : OUTPUT DECODER CODELIT SEMI'
- t[0] = GenCode(decoder_output = self.process_output(t[3]))
+ t[0] = GenCode(self, decoder_output = self.process_output(t[3]))
def p_output_exec(self, t):
'output_exec : OUTPUT EXEC CODELIT SEMI'
- t[0] = GenCode(exec_output = self.process_output(t[3]))
+ t[0] = GenCode(self, exec_output = self.process_output(t[3]))
# global let blocks 'let {{...}}' (Python code blocks) are
# executed directly when seen. Note that these execute in a
if debug:
raise
error(t, 'error: %s in global let block "%s".' % (exc, t[2]))
- t[0] = GenCode(header_output=self.exportContext["header_output"],
+ t[0] = GenCode(self,
+ header_output=self.exportContext["header_output"],
decoder_output=self.exportContext["decoder_output"],
exec_output=self.exportContext["exec_output"],
decode_block=self.exportContext["decode_block"])
error(t,
'error: %s in def operand_types block "%s".' % (exc, t[3]))
buildOperandTypeMap(user_dict, t.lexer.lineno)
- t[0] = GenCode() # contributes nothing to the output C++ file
+ t[0] = GenCode(self) # contributes nothing to the output C++ file
# Define the mapping from operand names to operand classes and
# other traits. Stored in operandNameMap.
raise
error(t, 'error: %s in def operands block "%s".' % (exc, t[3]))
buildOperandNameMap(user_dict, t.lexer.lineno)
- t[0] = GenCode() # contributes nothing to the output C++ file
+ t[0] = GenCode(self) # contributes nothing to the output C++ file
# A bitfield definition looks like:
# 'def [signed] bitfield <ID> [<first>:<last>]'
if (t[2] == 'signed'):
expr = 'sext<%d>(%s)' % (t[6] - t[8] + 1, expr)
hash_define = '#undef %s\n#define %s\t%s\n' % (t[4], t[4], expr)
- t[0] = GenCode(header_output = hash_define)
+ t[0] = GenCode(self, header_output=hash_define)
# alternate form for single bit: 'def [signed] bitfield <ID> [<bit>]'
def p_def_bitfield_1(self, t):
if (t[2] == 'signed'):
expr = 'sext<%d>(%s)' % (1, expr)
hash_define = '#undef %s\n#define %s\t%s\n' % (t[4], t[4], expr)
- t[0] = GenCode(header_output = hash_define)
+ t[0] = GenCode(self, header_output=hash_define)
# alternate form for structure member: 'def bitfield <ID> <ID>'
def p_def_bitfield_struct(self, t):
error(t, 'error: structure bitfields are always unsigned.')
expr = 'machInst.%s' % t[5]
hash_define = '#undef %s\n#define %s\t%s\n' % (t[4], t[4], expr)
- t[0] = GenCode(header_output = hash_define)
+ t[0] = GenCode(self, header_output=hash_define)
def p_id_with_dot_0(self, t):
'id_with_dot : ID'
def p_def_template(self, t):
'def_template : DEF TEMPLATE ID CODELIT SEMI'
- self.templateMap[t[3]] = Template(t[4])
- t[0] = GenCode()
+ self.templateMap[t[3]] = Template(self, t[4])
+ t[0] = GenCode(self)
# An instruction format definition looks like
# "def format <fmt>(<params>) {{...}};"
'def_format : DEF FORMAT ID LPAREN param_list RPAREN CODELIT SEMI'
(id, params, code) = (t[3], t[5], t[7])
self.defFormat(id, params, code, t.lexer.lineno)
- t[0] = GenCode()
+ t[0] = GenCode(self)
# The formal parameter list for an instruction format is a
# possibly empty list of comma-separated parameters. Positional
# the code generated by the other statements.
def p_decode_stmt_cpp(self, t):
'decode_stmt : CPPDIRECTIVE'
- t[0] = GenCode(t[1], t[1], t[1], t[1])
+ t[0] = GenCode(self, t[1], t[1], t[1], t[1])
# A format block 'format <foo> { ... }' sets the default
# instruction format used to handle instruction definitions inside
'inst : ID LPAREN arg_list RPAREN'
# Pass the ID and arg list to the current format class to deal with.
currentFormat = self.formatStack.top()
- codeObj = currentFormat.defineInst(t[1], t[3], t.lexer.lineno)
+ codeObj = currentFormat.defineInst(self, t[1], t[3], t.lexer.lineno)
args = ','.join(map(str, t[3]))
args = re.sub('(?m)^', '//', args)
args = re.sub('^//', '', args)
format = self.formatMap[t[1]]
except KeyError:
error(t, 'instruction format "%s" not defined.' % t[1])
- codeObj = format.defineInst(t[3], t[5], t.lexer.lineno)
+
+ codeObj = format.defineInst(self, t[3], t[5], t.lexer.lineno)
comment = '\n// %s::%s(%s)\n' % (t[1], t[3], t[5])
codeObj.prepend_all(comment)
t[0] = codeObj
# END OF GRAMMAR RULES
- exportContextSymbols = ('InstObjParams', 'makeList', 're', 'string')
def updateExportContext(self):
- exportDict = dict([(s, eval(s)) for s in self.exportContextSymbols])
- self.exportContext.update(exportDict)
- self.exportContext.update(parser.templateMap)
+
+ # create a continuation that allows us to grab the current parser
+ def wrapInstObjParams(*args):
+ return InstObjParams(self, *args)
+ self.exportContext['InstObjParams'] = wrapInstObjParams
+ self.exportContext.update(self.templateMap)
def defFormat(self, id, params, code, lineno):
'''Define a new format'''
error(lineno, 'format %s redefined.' % id)
# create new object and store in global map
- self.formatMap[id] = Format(self, id, params, code)
+ self.formatMap[id] = Format(id, params, code)
+
+ def expandCpuSymbolsToDict(self, template):
+ '''Expand template with CPU-specific references into a
+ dictionary with an entry for each CPU model name. The entry
+ key is the model name and the corresponding value is the
+ template with the CPU-specific refs substituted for that
+ model.'''
+
+ # Protect '%'s that don't go with CPU-specific terms
+ t = re.sub(r'%(?!\(CPU_)', '%%', template)
+ result = {}
+ for cpu in self.cpuModels:
+ result[cpu.name] = t % cpu.strings
+ return result
+
+ def expandCpuSymbolsToString(self, template):
+ '''*If* the template has CPU-specific references, return a
+ single string containing a copy of the template for each CPU
+ model with the corresponding values substituted in. If the
+ template has no CPU-specific references, it is returned
+ unmodified.'''
+
+ if template.find('%(CPU_') != -1:
+ return reduce(lambda x,y: x+y,
+ self.expandCpuSymbolsToDict(template).values())
+ else:
+ return template
+
+ def protectCpuSymbols(self, template):
+ '''Protect CPU-specific references by doubling the
+ corresponding '%'s (in preparation for substituting a different
+ set of references into the template).'''
+
+ return re.sub(r'%(?=\(CPU_)', '%%', template)
+
+ def protectNonSubstPercents(self, s):
+ '''Protect any non-dict-substitution '%'s in a format string
+ (i.e. those not followed by '(')'''
+
+ return re.sub(r'%(?!\()', '%%', s)
def update_if_needed(self, file, contents):
'''Update the output file only if the new contents are
self.update_if_needed('decoder.cc', file_template % vars())
# generate per-cpu exec files
- for cpu in cpu_models:
+ for cpu in self.cpuModels:
includes = '#include "decoder.hh"\n'
includes += cpu.includes
global_output = global_code.exec_output[cpu.name]
except ISAParserError, e:
e.exit(fileNameStack)
-# global list of CpuModel objects (see cpu_models.py)
-cpu_models = []
-
# Called as script: get args from command line.
# Args are: <path to cpu_models.py> <isa desc file> <output dir> <cpu models>
if __name__ == '__main__':
execfile(sys.argv[1]) # read in CpuModel definitions
cpu_models = [CpuModel.dict[cpu] for cpu in sys.argv[4:]]
- parser = ISAParser(sys.argv[3])
- parser.parse_isa_desc(sys.argv[2])
+ ISAParser(sys.argv[3], cpu_models).parse_isa_desc(sys.argv[2])
projects / gem5.git / commitdiff