from m5.util.grammar import Grammar
+debug=False
+
###################
# Utility functions
self.lineno = first
self.string = second
- def display(self, filename_stack, print_traceback=False):
+ def display(self, filename_stack, print_traceback=debug):
# Output formatted to work under Emacs compile-mode. Optional
# 'print_traceback' arg, if set to True, prints a Python stack
# backtrace too (can be handy when trying to debug the parser
return "%s%s %s" % (spaces, line_str, self.string)
- def exit(self, filename_stack, print_traceback=False):
+ def exit(self, filename_stack, print_traceback=debug):
# Just call exit.
sys.exit(self.display(filename_stack, print_traceback))
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
snippetLabels = [l for l in labelRE.findall(template)
if d.snippets.has_key(l)]
- snippets = dict([(s, mungeSnippet(d.snippets[s]))
+ snippets = dict([(s, self.parser.mungeSnippet(d.snippets[s]))
for s in snippetLabels])
myDict.update(snippets)
# operands explicitly (like Mem)
compositeCode += ' ' + template
- operands = SubOperandList(compositeCode, d.operands)
+ operands = SubOperandList(self.parser, compositeCode, d.operands)
myDict['op_decl'] = operands.concatAttrStrings('op_decl')
# 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.
# a defineInst() method that generates the code for an instruction
# definition.
-exportContextSymbols = ('InstObjParams', 'makeList', 're', 'string')
-
-exportContext = {}
-
-def updateExportContext():
- exportContext.update(exportDict(*exportContextSymbols))
- exportContext.update(parser.templateMap)
-
-def exportDict(*symNames):
- return dict([(s, eval(s)) for s in symNames])
-
-
class Format(object):
def __init__(self, id, params, code):
- # constructor: just save away arguments
self.id = id
self.params = params
label = 'def format ' + id
exec c
self.func = defInst
- def defineInst(self, name, args, lineno):
- context = {}
- updateExportContext()
- context.update(exportContext)
+ def defineInst(self, parser, name, args, lineno):
+ parser.updateExportContext()
+ context = parser.exportContext.copy()
if len(name):
Name = name[0].upper()
if len(name) > 1:
Name += name[1:]
- context.update({ 'name': name, 'Name': Name })
+ context.update({ 'name' : name, 'Name' : Name })
try:
vars = self.func(self.user_code, context, *args[0], **args[1])
except Exception, exc:
+ if debug:
+ raise
error(lineno, 'error defining "%s": %s.' % (name, exc))
for k in vars.keys():
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)
-# This dictionary maps format name strings to Format objects.
-formatMap = {}
-
-# Define a new format
-def defFormat(id, params, code, lineno):
- # make sure we haven't already defined this one
- if formatMap.get(id, None) != None:
- error(lineno, 'format %s redefined.' % id)
- # create new object and store in global map
- formatMap[id] = Format(id, params, code)
-
-#####################################################################
-#
-# 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:'
else:
return [ arg ]
-# Generate operandTypeMap from the user's 'def operand_types'
-# statement.
-def buildOperandTypeMap(user_dict, lineno):
- global operandTypeMap
- operandTypeMap = {}
- for (ext, (desc, size)) in user_dict.iteritems():
- if desc == 'signed int':
- ctype = 'int%d_t' % size
- is_signed = 1
- elif desc == 'unsigned int':
- ctype = 'uint%d_t' % size
- is_signed = 0
- elif desc == 'float':
- is_signed = 1 # shouldn't really matter
- if size == 32:
- ctype = 'float'
- elif size == 64:
- ctype = 'double'
- elif desc == 'twin64 int':
- is_signed = 0
- ctype = 'Twin64_t'
- elif desc == 'twin32 int':
- is_signed = 0
- ctype = 'Twin32_t'
- if ctype == '':
- error(lineno, 'Unrecognized type description "%s" in user_dict')
- operandTypeMap[ext] = (size, ctype, is_signed)
-
class Operand(object):
'''Base class for operand descriptors. An instance of this class
(or actually a class derived from this one) represents a specific
type (e.g., "32-bit integer register").'''
def buildReadCode(self, func = None):
- code = self.read_code % {"name": self.base_name,
- "func": func,
- "op_idx": self.src_reg_idx,
- "reg_idx": self.reg_spec,
- "size": self.size,
- "ctype": self.ctype}
+ subst_dict = {"name": self.base_name,
+ "func": func,
+ "reg_idx": self.reg_spec,
+ "size": self.size,
+ "ctype": self.ctype}
+ if hasattr(self, 'src_reg_idx'):
+ subst_dict['op_idx'] = self.src_reg_idx
+ code = self.read_code % subst_dict
if self.size != self.dflt_size:
return '%s = bits(%s, %d, 0);\n' % \
(self.base_name, code, self.size-1)
final_val = 'sext<%d>(%s)' % (self.size, self.base_name)
else:
final_val = self.base_name
- code = self.write_code % {"name": self.base_name,
- "func": func,
- "op_idx": self.dest_reg_idx,
- "reg_idx": self.reg_spec,
- "size": self.size,
- "ctype": self.ctype,
- "final_val": final_val}
+ subst_dict = {"name": self.base_name,
+ "func": func,
+ "reg_idx": self.reg_spec,
+ "size": self.size,
+ "ctype": self.ctype,
+ "final_val": final_val}
+ if hasattr(self, 'dest_reg_idx'):
+ subst_dict['op_idx'] = self.dest_reg_idx
+ code = self.write_code % subst_dict
return '''
{
%s final_val = %s;
if (traceData) { traceData->setData(final_val); }
}''' % (self.dflt_ctype, final_val, code)
- def __init__(self, full_name, ext, is_src, is_dest):
+ def __init__(self, parser, full_name, ext, is_src, is_dest):
self.full_name = full_name
self.ext = ext
self.is_src = is_src
else:
self.eff_ext = self.dflt_ext
- (self.size, self.ctype, self.is_signed) = operandTypeMap[self.eff_ext]
+ self.size, self.ctype, self.is_signed = \
+ parser.operandTypeMap[self.eff_ext]
# note that mem_acc_size is undefined for non-mem operands...
# template must be careful not to use it if it doesn't apply.
return self.buildWriteCode('setNextNPC')
return 'xc->setNextNPC(%s);\n' % self.base_name
-def buildOperandNameMap(user_dict, lineno):
- global operandNameMap
- operandNameMap = {}
- for (op_name, val) in user_dict.iteritems():
- (base_cls_name, dflt_ext, reg_spec, flags, sort_pri) = val[:5]
- if len(val) > 5:
- read_code = val[5]
- else:
- read_code = None
- if len(val) > 6:
- write_code = val[6]
- else:
- write_code = None
- if len(val) > 7:
- error(lineno,
- 'error: too many attributes for operand "%s"' %
- base_cls_name)
-
- (dflt_size, dflt_ctype, dflt_is_signed) = operandTypeMap[dflt_ext]
- # Canonical flag structure is a triple of lists, where each list
- # indicates the set of flags implied by this operand always, when
- # used as a source, and when used as a dest, respectively.
- # For simplicity this can be initialized using a variety of fairly
- # obvious shortcuts; we convert these to canonical form here.
- if not flags:
- # no flags specified (e.g., 'None')
- flags = ( [], [], [] )
- elif isinstance(flags, str):
- # a single flag: assumed to be unconditional
- flags = ( [ flags ], [], [] )
- elif isinstance(flags, list):
- # a list of flags: also assumed to be unconditional
- flags = ( flags, [], [] )
- elif isinstance(flags, tuple):
- # it's a tuple: it should be a triple,
- # but each item could be a single string or a list
- (uncond_flags, src_flags, dest_flags) = flags
- flags = (makeList(uncond_flags),
- makeList(src_flags), makeList(dest_flags))
- # Accumulate attributes of new operand class in tmp_dict
- tmp_dict = {}
- for attr in ('dflt_ext', 'reg_spec', 'flags', 'sort_pri',
- 'dflt_size', 'dflt_ctype', 'dflt_is_signed',
- 'read_code', 'write_code'):
- tmp_dict[attr] = eval(attr)
- tmp_dict['base_name'] = op_name
- # New class name will be e.g. "IntReg_Ra"
- cls_name = base_cls_name + '_' + op_name
- # Evaluate string arg to get class object. Note that the
- # actual base class for "IntReg" is "IntRegOperand", i.e. we
- # have to append "Operand".
- try:
- base_cls = eval(base_cls_name + 'Operand')
- except NameError:
- error(lineno,
- 'error: unknown operand base class "%s"' % base_cls_name)
- # The following statement creates a new class called
- # <cls_name> as a subclass of <base_cls> with the attributes
- # in tmp_dict, just as if we evaluated a class declaration.
- operandNameMap[op_name] = type(cls_name, (base_cls,), tmp_dict)
-
- # Define operand variables.
- operands = user_dict.keys()
-
- operandsREString = (r'''
- (?<![\w\.]) # neg. lookbehind assertion: prevent partial matches
- ((%s)(?:\.(\w+))?) # match: operand with optional '.' then suffix
- (?![\w\.]) # neg. lookahead assertion: prevent partial matches
- '''
- % string.join(operands, '|'))
-
- global operandsRE
- operandsRE = re.compile(operandsREString, re.MULTILINE|re.VERBOSE)
-
- # Same as operandsREString, but extension is mandatory, and only two
- # groups are returned (base and ext, not full name as above).
- # Used for subtituting '_' for '.' to make C++ identifiers.
- operandsWithExtREString = (r'(?<![\w\.])(%s)\.(\w+)(?![\w\.])'
- % string.join(operands, '|'))
-
- global operandsWithExtRE
- operandsWithExtRE = re.compile(operandsWithExtREString, re.MULTILINE)
-
-maxInstSrcRegs = 0
-maxInstDestRegs = 0
-
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
# search for operands
next_pos = 0
while 1:
- match = operandsRE.search(code, next_pos)
+ match = parser.operandsRE.search(code, next_pos)
if not match:
# no more matches: we're done
break
op_desc.is_dest = op_desc.is_dest or is_dest
else:
# new operand: create new descriptor
- op_desc = operandNameMap[op_base](op_full, op_ext,
- is_src, is_dest)
+ op_desc = parser.operandNameMap[op_base](parser,
+ op_full, op_ext, is_src, is_dest)
self.append(op_desc)
# start next search after end of current match
next_pos = match.end()
if self.memOperand:
error("Code block has more than one memory operand.")
self.memOperand = op_desc
- global maxInstSrcRegs
- global maxInstDestRegs
- if maxInstSrcRegs < self.numSrcRegs:
- maxInstSrcRegs = self.numSrcRegs
- if maxInstDestRegs < self.numDestRegs:
- maxInstDestRegs = self.numDestRegs
+ if parser.maxInstSrcRegs < self.numSrcRegs:
+ parser.maxInstSrcRegs = self.numSrcRegs
+ if parser.maxInstDestRegs < self.numDestRegs:
+ parser.maxInstDestRegs = self.numDestRegs
# now make a final pass to finalize op_desc fields that may depend
# on the register enumeration
for op_desc in self.items:
class SubOperandList(OperandList):
'''Find all the operands in the given code block. Returns an operand
descriptor list (instance of class OperandList).'''
- def __init__(self, code, master_list):
+ def __init__(self, parser, code, master_list):
self.items = []
self.bases = {}
# delete comments so we don't match on reg specifiers inside
# search for operands
next_pos = 0
while 1:
- match = operandsRE.search(code, next_pos)
+ match = parser.operandsRE.search(code, next_pos)
if not match:
# no more matches: we're done
break
# (used in findOperands())
assignRE = re.compile(r'\s*=(?!=)', re.MULTILINE)
-# Munge operand names in code string to make legal C++ variable names.
-# This means getting rid of the type extension if any.
-# (Will match base_name attribute of Operand object.)
-def substMungedOpNames(code):
- return operandsWithExtRE.sub(r'\1', code)
-
-# Fix up code snippets for final substitution in templates.
-def mungeSnippet(s):
- if isinstance(s, str):
- return substMungedOpNames(substBitOps(s))
- else:
- return s
-
def makeFlagConstructor(flag_list):
if len(flag_list) == 0:
return ''
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
def top(self):
return self[-1]
-# The global format stack.
-formatStack = Stack(NoFormat())
-
-# The global default case stack.
-defaultStack = Stack(None)
-
-# Global stack that tracks current file and line number.
-# Each element is a tuple (filename, lineno) that records the
-# *current* filename and the line number in the *previous* file where
-# it was included.
-fileNameStack = Stack()
-
-
#######################
#
# Output file template
'''
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.
+ self.formatMap = {}
+
+ # The format stack.
+ self.formatStack = Stack(NoFormat())
+
+ # The default case stack.
+ self.defaultStack = Stack(None)
+
+ # Stack that tracks current file and line number. Each
+ # element is a tuple (filename, lineno) that records the
+ # *current* filename and the line number in the *previous*
+ # file where it was included.
+ self.fileNameStack = Stack()
+
+ symbols = ('makeList', 're', 'string')
+ self.exportContext = dict([(s, eval(s)) for s in symbols])
+
+ self.maxInstSrcRegs = 0
+ self.maxInstDestRegs = 0
+
#####################################################################
#
# Lexer
def t_NEWFILE(self, t):
r'^\#\#newfile\s+"[\w/.-]*"'
- fileNameStack.push((t.value[11:-1], t.lexer.lineno))
+ self.fileNameStack.push((t.value[11:-1], t.lexer.lineno))
t.lexer.lineno = 0
def t_ENDFILE(self, t):
r'^\#\#endfile'
- (old_filename, t.lexer.lineno) = fileNameStack.pop()
+ (old_filename, t.lexer.lineno) = self.fileNameStack.pop()
#
# The functions t_NEWLINE, t_ignore, and t_error are
# 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
# from polluting this script's namespace.
def p_global_let(self, t):
'global_let : LET CODELIT SEMI'
- updateExportContext()
- exportContext["header_output"] = ''
- exportContext["decoder_output"] = ''
- exportContext["exec_output"] = ''
- exportContext["decode_block"] = ''
+ self.updateExportContext()
+ self.exportContext["header_output"] = ''
+ self.exportContext["decoder_output"] = ''
+ self.exportContext["exec_output"] = ''
+ self.exportContext["decode_block"] = ''
try:
- exec fixPythonIndentation(t[2]) in exportContext
+ exec fixPythonIndentation(t[2]) in self.exportContext
except Exception, exc:
+ if debug:
+ raise
error(t, 'error: %s in global let block "%s".' % (exc, t[2]))
- t[0] = GenCode(header_output = exportContext["header_output"],
- decoder_output = exportContext["decoder_output"],
- exec_output = exportContext["exec_output"],
- decode_block = exportContext["decode_block"])
+ 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"])
# Define the mapping from operand type extensions to C++ types and
# bit widths (stored in operandTypeMap).
try:
user_dict = eval('{' + t[3] + '}')
except Exception, exc:
+ if debug:
+ raise
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
+ self.buildOperandTypeMap(user_dict, t.lexer.lineno)
+ 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.
def p_def_operands(self, t):
'def_operands : DEF OPERANDS CODELIT SEMI'
- if not globals().has_key('operandTypeMap'):
+ if not hasattr(self, 'operandTypeMap'):
error(t, 'error: operand types must be defined before operands')
try:
- user_dict = eval('{' + t[3] + '}', exportContext)
+ user_dict = eval('{' + t[3] + '}', self.exportContext)
except Exception, exc:
+ if debug:
+ 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
+ self.buildOperandNameMap(user_dict, t.lexer.lineno)
+ 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 p_def_format(self, t):
'def_format : DEF FORMAT ID LPAREN param_list RPAREN CODELIT SEMI'
(id, params, code) = (t[3], t[5], t[7])
- defFormat(id, params, code, t.lexer.lineno)
- t[0] = GenCode()
+ self.defFormat(id, params, code, t.lexer.lineno)
+ t[0] = GenCode(self)
# The formal parameter list for an instruction format is a
# possibly empty list of comma-separated parameters. Positional
#
def p_decode_block(self, t):
'decode_block : DECODE ID opt_default LBRACE decode_stmt_list RBRACE'
- default_defaults = defaultStack.pop()
+ default_defaults = self.defaultStack.pop()
codeObj = t[5]
# use the "default defaults" only if there was no explicit
# default statement in decode_stmt_list
'opt_default : empty'
# no default specified: reuse the one currently at the top of
# the stack
- defaultStack.push(defaultStack.top())
+ self.defaultStack.push(self.defaultStack.top())
# no meaningful value returned
t[0] = None
# push the new default
codeObj = t[2]
codeObj.wrap_decode_block('\ndefault:\n', 'break;\n')
- defaultStack.push(codeObj)
+ self.defaultStack.push(codeObj)
# no meaningful value returned
t[0] = None
# 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
# is processed (see below). Once the parser has recognized
# the full production (though the right brace), we're done
# with the format, so now we can pop it.
- formatStack.pop()
+ self.formatStack.pop()
t[0] = t[4]
# This rule exists so we can set the current format (& push the
def p_push_format_id(self, t):
'push_format_id : ID'
try:
- formatStack.push(formatMap[t[1]])
+ self.formatStack.push(self.formatMap[t[1]])
t[0] = ('', '// format %s' % t[1])
except KeyError:
error(t, 'instruction format "%s" not defined.' % t[1])
def p_inst_0(self, t):
'inst : ID LPAREN arg_list RPAREN'
# Pass the ID and arg list to the current format class to deal with.
- currentFormat = formatStack.top()
- codeObj = currentFormat.defineInst(t[1], t[3], t.lexer.lineno)
+ currentFormat = self.formatStack.top()
+ 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)
def p_inst_1(self, t):
'inst : ID DBLCOLON ID LPAREN arg_list RPAREN'
try:
- format = formatMap[t[1]]
+ 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
+ def updateExportContext(self):
+
+ # 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'''
+
+ # make sure we haven't already defined this one
+ if id in self.formatMap:
+ error(lineno, 'format %s redefined.' % id)
+
+ # create new object and store in global map
+ 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 buildOperandTypeMap(self, user_dict, lineno):
+ """Generate operandTypeMap from the user's 'def operand_types'
+ statement."""
+ operand_type = {}
+ for (ext, (desc, size)) in user_dict.iteritems():
+ if desc == 'signed int':
+ ctype = 'int%d_t' % size
+ is_signed = 1
+ elif desc == 'unsigned int':
+ ctype = 'uint%d_t' % size
+ is_signed = 0
+ elif desc == 'float':
+ is_signed = 1 # shouldn't really matter
+ if size == 32:
+ ctype = 'float'
+ elif size == 64:
+ ctype = 'double'
+ elif desc == 'twin64 int':
+ is_signed = 0
+ ctype = 'Twin64_t'
+ elif desc == 'twin32 int':
+ is_signed = 0
+ ctype = 'Twin32_t'
+ if ctype == '':
+ error(parser, lineno,
+ 'Unrecognized type description "%s" in user_dict')
+ operand_type[ext] = (size, ctype, is_signed)
+
+ self.operandTypeMap = operand_type
+
+ def buildOperandNameMap(self, user_dict, lineno):
+ operand_name = {}
+ for op_name, val in user_dict.iteritems():
+ base_cls_name, dflt_ext, reg_spec, flags, sort_pri = val[:5]
+ if len(val) > 5:
+ read_code = val[5]
+ else:
+ read_code = None
+ if len(val) > 6:
+ write_code = val[6]
+ else:
+ write_code = None
+ if len(val) > 7:
+ error(lineno,
+ 'error: too many attributes for operand "%s"' %
+ base_cls_name)
+
+ (dflt_size, dflt_ctype, dflt_is_signed) = \
+ self.operandTypeMap[dflt_ext]
+ # Canonical flag structure is a triple of lists, where each list
+ # indicates the set of flags implied by this operand always, when
+ # used as a source, and when used as a dest, respectively.
+ # For simplicity this can be initialized using a variety of fairly
+ # obvious shortcuts; we convert these to canonical form here.
+ if not flags:
+ # no flags specified (e.g., 'None')
+ flags = ( [], [], [] )
+ elif isinstance(flags, str):
+ # a single flag: assumed to be unconditional
+ flags = ( [ flags ], [], [] )
+ elif isinstance(flags, list):
+ # a list of flags: also assumed to be unconditional
+ flags = ( flags, [], [] )
+ elif isinstance(flags, tuple):
+ # it's a tuple: it should be a triple,
+ # but each item could be a single string or a list
+ (uncond_flags, src_flags, dest_flags) = flags
+ flags = (makeList(uncond_flags),
+ makeList(src_flags), makeList(dest_flags))
+ # Accumulate attributes of new operand class in tmp_dict
+ tmp_dict = {}
+ for attr in ('dflt_ext', 'reg_spec', 'flags', 'sort_pri',
+ 'dflt_size', 'dflt_ctype', 'dflt_is_signed',
+ 'read_code', 'write_code'):
+ tmp_dict[attr] = eval(attr)
+ tmp_dict['base_name'] = op_name
+ # New class name will be e.g. "IntReg_Ra"
+ cls_name = base_cls_name + '_' + op_name
+ # Evaluate string arg to get class object. Note that the
+ # actual base class for "IntReg" is "IntRegOperand", i.e. we
+ # have to append "Operand".
+ try:
+ base_cls = eval(base_cls_name + 'Operand')
+ except NameError:
+ error(lineno,
+ 'error: unknown operand base class "%s"' % base_cls_name)
+ # The following statement creates a new class called
+ # <cls_name> as a subclass of <base_cls> with the attributes
+ # in tmp_dict, just as if we evaluated a class declaration.
+ operand_name[op_name] = type(cls_name, (base_cls,), tmp_dict)
+
+ self.operandNameMap = operand_name
+
+ # Define operand variables.
+ operands = user_dict.keys()
+
+ operandsREString = (r'''
+ (?<![\w\.]) # neg. lookbehind assertion: prevent partial matches
+ ((%s)(?:\.(\w+))?) # match: operand with optional '.' then suffix
+ (?![\w\.]) # neg. lookahead assertion: prevent partial matches
+ '''
+ % string.join(operands, '|'))
+
+ self.operandsRE = re.compile(operandsREString, re.MULTILINE|re.VERBOSE)
+
+ # Same as operandsREString, but extension is mandatory, and only two
+ # groups are returned (base and ext, not full name as above).
+ # Used for subtituting '_' for '.' to make C++ identifiers.
+ operandsWithExtREString = (r'(?<![\w\.])(%s)\.(\w+)(?![\w\.])'
+ % string.join(operands, '|'))
+
+ self.operandsWithExtRE = \
+ re.compile(operandsWithExtREString, re.MULTILINE)
+
+ def substMungedOpNames(self, code):
+ '''Munge operand names in code string to make legal C++
+ variable names. This means getting rid of the type extension
+ if any. Will match base_name attribute of Operand object.)'''
+ return self.operandsWithExtRE.sub(r'\1', code)
+
+ def mungeSnippet(self, s):
+ '''Fix up code snippets for final substitution in templates.'''
+ if isinstance(s, str):
+ return self.substMungedOpNames(substBitOps(s))
+ else:
+ return s
+
def update_if_needed(self, file, contents):
'''Update the output file only if the new contents are
different from the current contents. Minimizes the files that
except IOError:
error('Error including file "%s"' % filename)
- fileNameStack.push((filename, 0))
+ self.fileNameStack.push((filename, 0))
# Find any includes and include them
def replace(matchobj):
return self.replace_include(matchobj, current_dir)
contents = self.includeRE.sub(replace, contents)
- fileNameStack.pop()
+ self.fileNameStack.pop()
return contents
def _parse_isa_desc(self, isa_desc_file):
isa_desc = self.read_and_flatten(isa_desc_file)
# Initialize filename stack with outer file.
- fileNameStack.push((isa_desc_file, 0))
+ self.fileNameStack.push((isa_desc_file, 0))
# Parse it.
(isa_name, namespace, global_code, namespace_code) = \
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]
# The variable names here are hacky, but this will creat local
# variables which will be referenced in vars() which have the
# value of the globals.
- global maxInstSrcRegs
- MaxInstSrcRegs = maxInstSrcRegs
- global maxInstDestRegs
- MaxInstDestRegs = maxInstDestRegs
+ MaxInstSrcRegs = self.maxInstSrcRegs
+ MaxInstDestRegs = self.maxInstDestRegs
# max_inst_regs.hh
self.update_if_needed('max_inst_regs.hh',
max_inst_regs_template % vars())
try:
self._parse_isa_desc(*args, **kwargs)
except ISAParserError, e:
- e.exit(fileNameStack)
-
-# global list of CpuModel objects (see cpu_models.py)
-cpu_models = []
+ e.exit(self.fileNameStack)
# 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 / blobdiff