src/arch/isa_parser.py

11 # modified or unmodified, in source code or in binary form.
19 # met: redistributions of source code must retain the above copyright
61 # Used to make nested code blocks look pretty.
67 # Munge a somewhat arbitrarily formatted piece of Python code
74 # indentation.  Unfortunately the way code literals work, an entire
77 # 1:' to make the let code the nested block inside the if (and have
80 # We don't want to do this if (1) the code block is empty or (2) the
123         # in the templated C++ code)
227 # a defineInst() method that generates the code for an instruction
231     def __init__(self, id, params, code):
235         self.user_code = compile(fixPythonIndentation(code), label, 'exec')
278 # The GenCode class encapsulates generated code destined for various
280 # strings containing code destined for decoder.hh and decoder.cc
281 # respectively.  The decode_block attribute contains code to be
283 # decoder.cc).  The exec_output attribute  is the string of code for the
299     # Write these code chunks out to the filesystem.  They will be properly
344 def substBitOps(code):
347     code = bitOp1ArgRE.sub(r'<\1:\1>', code)
350     code = bitOpWordRE.sub(r'bits(\1, \2, \3)', code)
353     match = bitOpExprRE.search(code)
359             if code[here] == '(':
361             elif code[here] == ')':
367         newExpr = r'bits(%s, %s, %s)' % (code[exprStart:exprEnd+1],
369         code = code[:exprStart] + newExpr + code[match.end():]
370         match = bitOpExprRE.search(code)
371     return code
378 # The remaining code is the support for automatically extracting
399     operand for a code block (e.g, "Rc.sq" as a dest). Intermediate
410         code = self.read_code % subst_dict
411         return '%s = %s;\n' % (self.base_name, code)
421         code = self.write_code % subst_dict
427         }''' % (self.dflt_ctype, self.base_name, code)
444     # Finalize additional fields (primarily code fields).  This step
631         code = 'xc->readFloatRegOperandBits(this, %s)' % rindex
633             code = 'bitsToFloat32(%s)' % code
635             code = 'bitsToFloat64(%s)' % code
636         return '%s = %s;\n' % (self.base_name, code)
977             error('Attempt to read condition-code register as FP')
994             error('Attempt to write condition-code register as FP')
1128     '''Find all the operands in the given code block.  Returns an operand
1130     def __init__(self, parser, code):
1135             code = regEx.sub('', code)
1139             match = parser.operandsRE.search(code, next_pos)
1156             is_dest = (assignRE.match(code, match.end()) != None)
1298     '''Find all the operands in the given code block.  Returns an operand
1300     def __init__(self, parser, code, master_list):
1305             code = regEx.sub('', code)
1309             match = parser.operandsRE.search(code, next_pos)
1383 # findOperands()).  If the code immediately following the first
1404     code = pre + string.join(flag_list, post + pre) + post
1405     return code
1420             snippets = {'code' : snippets}
1526 #     minimum of disruption to existing increment code.
1608     # Get the file object for emitting code into the specified section
1781         # code literal
1996     # Output blocks 'output <foo> {{...}}' (C++ code blocks) are copied
2012     # global let blocks 'let {{...}}' (Python code blocks) are
2014     # special variable context 'exportContext' to prevent the code
2035         # (e.g.) "split('exec')" in the Python code and the split #ifdef's
2137         (id, params, code) = (t[3], t[5], t[7])
2138         self.defFormat(id, params, code, t.lexer.lineno)
2275     # code streams.  This works well for ifdefs, so we can ifdef out
2279     # the code generated by the other statements.
2315         # just wrap the decoding code from the block as a case in the
2495     def defFormat(self, id, params, code, lineno):
2503         self.formatMap[id] = Format(id, params, code)
2615     def substMungedOpNames(self, code):
2616         '''Munge operand names in code string to make legal C++
2619         return self.operandsWithExtRE.sub(r'\1', code)
2622         '''Fix up code snippets for final substitution in templates.'''
2687         # the files it expects (in src/arch/$ARCH/generated). This code
2689         # invocations just expect different things. Since this code runs