micro_asm.py revision 4591
14483Sgblack@eecs.umich.edu# Copyright (c) 2003-2005 The Regents of The University of Michigan 24483Sgblack@eecs.umich.edu# All rights reserved. 34483Sgblack@eecs.umich.edu# 44483Sgblack@eecs.umich.edu# Redistribution and use in source and binary forms, with or without 54483Sgblack@eecs.umich.edu# modification, are permitted provided that the following conditions are 64483Sgblack@eecs.umich.edu# met: redistributions of source code must retain the above copyright 74483Sgblack@eecs.umich.edu# notice, this list of conditions and the following disclaimer; 84483Sgblack@eecs.umich.edu# redistributions in binary form must reproduce the above copyright 94483Sgblack@eecs.umich.edu# notice, this list of conditions and the following disclaimer in the 104483Sgblack@eecs.umich.edu# documentation and/or other materials provided with the distribution; 114483Sgblack@eecs.umich.edu# neither the name of the copyright holders nor the names of its 124483Sgblack@eecs.umich.edu# contributors may be used to endorse or promote products derived from 134483Sgblack@eecs.umich.edu# this software without specific prior written permission. 144483Sgblack@eecs.umich.edu# 154483Sgblack@eecs.umich.edu# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 164483Sgblack@eecs.umich.edu# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 174483Sgblack@eecs.umich.edu# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 184483Sgblack@eecs.umich.edu# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 194483Sgblack@eecs.umich.edu# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 204483Sgblack@eecs.umich.edu# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 214483Sgblack@eecs.umich.edu# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 224483Sgblack@eecs.umich.edu# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 234483Sgblack@eecs.umich.edu# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 244483Sgblack@eecs.umich.edu# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 254483Sgblack@eecs.umich.edu# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 264483Sgblack@eecs.umich.edu# 274483Sgblack@eecs.umich.edu# Authors: Gabe Black 284483Sgblack@eecs.umich.edu 294483Sgblack@eecs.umich.eduimport os 304483Sgblack@eecs.umich.eduimport sys 314483Sgblack@eecs.umich.eduimport re 324483Sgblack@eecs.umich.eduimport string 334483Sgblack@eecs.umich.eduimport traceback 344483Sgblack@eecs.umich.edu# get type names 354483Sgblack@eecs.umich.edufrom types import * 364483Sgblack@eecs.umich.edu 374483Sgblack@eecs.umich.edu# Prepend the directory where the PLY lex & yacc modules are found 384483Sgblack@eecs.umich.edu# to the search path. 394483Sgblack@eecs.umich.edusys.path[0:0] = [os.environ['M5_PLY']] 404483Sgblack@eecs.umich.edu 414483Sgblack@eecs.umich.edufrom ply import lex 424483Sgblack@eecs.umich.edufrom ply import yacc 434483Sgblack@eecs.umich.edu 444483Sgblack@eecs.umich.edu########################################################################## 454483Sgblack@eecs.umich.edu# 464483Sgblack@eecs.umich.edu# Base classes for use outside of the assembler 474483Sgblack@eecs.umich.edu# 484483Sgblack@eecs.umich.edu########################################################################## 494483Sgblack@eecs.umich.edu 504483Sgblack@eecs.umich.educlass Micro_Container(object): 514483Sgblack@eecs.umich.edu def __init__(self, name): 524483Sgblack@eecs.umich.edu self.microops = [] 534483Sgblack@eecs.umich.edu self.name = name 544483Sgblack@eecs.umich.edu self.directives = {} 554483Sgblack@eecs.umich.edu self.micro_classes = {} 564483Sgblack@eecs.umich.edu self.labels = {} 574483Sgblack@eecs.umich.edu 584483Sgblack@eecs.umich.edu def add_microop(self, microop): 594483Sgblack@eecs.umich.edu self.microops.append(microop) 604483Sgblack@eecs.umich.edu 614483Sgblack@eecs.umich.edu def __str__(self): 624483Sgblack@eecs.umich.edu string = "%s:\n" % self.name 634483Sgblack@eecs.umich.edu for microop in self.microops: 644483Sgblack@eecs.umich.edu string += " %s\n" % microop 654483Sgblack@eecs.umich.edu return string 664483Sgblack@eecs.umich.edu 674507Sgblack@eecs.umich.educlass Combinational_Macroop(Micro_Container): 684483Sgblack@eecs.umich.edu pass 694483Sgblack@eecs.umich.edu 704507Sgblack@eecs.umich.educlass Rom_Macroop(object): 714507Sgblack@eecs.umich.edu def __init__(self, name, target): 724507Sgblack@eecs.umich.edu self.name = name 734507Sgblack@eecs.umich.edu self.target = target 744507Sgblack@eecs.umich.edu 754508Sgblack@eecs.umich.edu def __str__(self): 764508Sgblack@eecs.umich.edu return "%s: %s\n" % (self.name, self.target) 774508Sgblack@eecs.umich.edu 784483Sgblack@eecs.umich.educlass Rom(Micro_Container): 794483Sgblack@eecs.umich.edu def __init__(self, name): 804483Sgblack@eecs.umich.edu super(Rom, self).__init__(name) 814483Sgblack@eecs.umich.edu self.externs = {} 824483Sgblack@eecs.umich.edu 834483Sgblack@eecs.umich.edu########################################################################## 844483Sgblack@eecs.umich.edu# 854483Sgblack@eecs.umich.edu# Support classes 864483Sgblack@eecs.umich.edu# 874483Sgblack@eecs.umich.edu########################################################################## 884483Sgblack@eecs.umich.edu 894483Sgblack@eecs.umich.educlass Label(object): 904483Sgblack@eecs.umich.edu def __init__(self): 914483Sgblack@eecs.umich.edu self.extern = False 924483Sgblack@eecs.umich.edu self.name = "" 934483Sgblack@eecs.umich.edu 944483Sgblack@eecs.umich.educlass Block(object): 954483Sgblack@eecs.umich.edu def __init__(self): 964483Sgblack@eecs.umich.edu self.statements = [] 974483Sgblack@eecs.umich.edu 984483Sgblack@eecs.umich.educlass Statement(object): 994483Sgblack@eecs.umich.edu def __init__(self): 1004483Sgblack@eecs.umich.edu self.is_microop = False 1014483Sgblack@eecs.umich.edu self.is_directive = False 1024503Sgblack@eecs.umich.edu self.params = "" 1034483Sgblack@eecs.umich.edu 1044483Sgblack@eecs.umich.educlass Microop(Statement): 1054483Sgblack@eecs.umich.edu def __init__(self): 1064483Sgblack@eecs.umich.edu super(Microop, self).__init__() 1074483Sgblack@eecs.umich.edu self.mnemonic = "" 1084483Sgblack@eecs.umich.edu self.labels = [] 1094483Sgblack@eecs.umich.edu self.is_microop = True 1104483Sgblack@eecs.umich.edu 1114483Sgblack@eecs.umich.educlass Directive(Statement): 1124483Sgblack@eecs.umich.edu def __init__(self): 1134483Sgblack@eecs.umich.edu super(Directive, self).__init__() 1144483Sgblack@eecs.umich.edu self.name = "" 1154483Sgblack@eecs.umich.edu self.is_directive = True 1164483Sgblack@eecs.umich.edu 1174483Sgblack@eecs.umich.edu########################################################################## 1184483Sgblack@eecs.umich.edu# 1194483Sgblack@eecs.umich.edu# Functions that handle common tasks 1204483Sgblack@eecs.umich.edu# 1214483Sgblack@eecs.umich.edu########################################################################## 1224483Sgblack@eecs.umich.edu 1234483Sgblack@eecs.umich.edudef print_error(message): 1244483Sgblack@eecs.umich.edu print 1254483Sgblack@eecs.umich.edu print "*** %s" % message 1264483Sgblack@eecs.umich.edu print 1274483Sgblack@eecs.umich.edu 1284483Sgblack@eecs.umich.edudef handle_statement(parser, container, statement): 1294483Sgblack@eecs.umich.edu if statement.is_microop: 1304483Sgblack@eecs.umich.edu try: 1314483Sgblack@eecs.umich.edu microop = eval('parser.microops[statement.mnemonic](%s)' % 1324483Sgblack@eecs.umich.edu statement.params) 1334483Sgblack@eecs.umich.edu except: 1344591Sgblack@eecs.umich.edu print_error("Error creating microop object with mnemonic %s." % \ 1354591Sgblack@eecs.umich.edu statement.mnemonic) 1364483Sgblack@eecs.umich.edu raise 1374483Sgblack@eecs.umich.edu try: 1384483Sgblack@eecs.umich.edu for label in statement.labels: 1394483Sgblack@eecs.umich.edu container.labels[label.name] = microop 1404483Sgblack@eecs.umich.edu if label.extern: 1414483Sgblack@eecs.umich.edu container.externs[label.name] = microop 1424483Sgblack@eecs.umich.edu container.add_microop(microop) 1434483Sgblack@eecs.umich.edu except: 1444483Sgblack@eecs.umich.edu print_error("Error adding microop.") 1454483Sgblack@eecs.umich.edu raise 1464483Sgblack@eecs.umich.edu elif statement.is_directive: 1474483Sgblack@eecs.umich.edu try: 1484503Sgblack@eecs.umich.edu eval('container.directives[statement.name](%s)' % statement.params) 1494483Sgblack@eecs.umich.edu except: 1504483Sgblack@eecs.umich.edu print_error("Error executing directive.") 1514483Sgblack@eecs.umich.edu print container.directives 1524483Sgblack@eecs.umich.edu raise 1534483Sgblack@eecs.umich.edu else: 1544483Sgblack@eecs.umich.edu raise Exception, "Didn't recognize the type of statement", statement 1554483Sgblack@eecs.umich.edu 1564483Sgblack@eecs.umich.edu########################################################################## 1574483Sgblack@eecs.umich.edu# 1584483Sgblack@eecs.umich.edu# Lexer specification 1594483Sgblack@eecs.umich.edu# 1604483Sgblack@eecs.umich.edu########################################################################## 1614483Sgblack@eecs.umich.edu 1624483Sgblack@eecs.umich.edu# Error handler. Just call exit. Output formatted to work under 1634483Sgblack@eecs.umich.edu# Emacs compile-mode. Optional 'print_traceback' arg, if set to True, 1644483Sgblack@eecs.umich.edu# prints a Python stack backtrace too (can be handy when trying to 1654483Sgblack@eecs.umich.edu# debug the parser itself). 1664483Sgblack@eecs.umich.edudef error(lineno, string, print_traceback = False): 1674483Sgblack@eecs.umich.edu # Print a Python stack backtrace if requested. 1684483Sgblack@eecs.umich.edu if (print_traceback): 1694483Sgblack@eecs.umich.edu traceback.print_exc() 1704483Sgblack@eecs.umich.edu if lineno != 0: 1714483Sgblack@eecs.umich.edu line_str = "%d:" % lineno 1724483Sgblack@eecs.umich.edu else: 1734483Sgblack@eecs.umich.edu line_str = "" 1744483Sgblack@eecs.umich.edu sys.exit("%s %s" % (line_str, string)) 1754483Sgblack@eecs.umich.edu 1764483Sgblack@eecs.umich.edureserved = ('DEF', 'MACROOP', 'ROM', 'EXTERN') 1774483Sgblack@eecs.umich.edu 1784483Sgblack@eecs.umich.edutokens = reserved + ( 1794483Sgblack@eecs.umich.edu # identifier 1804483Sgblack@eecs.umich.edu 'ID', 1814483Sgblack@eecs.umich.edu # arguments for microops and directives 1824483Sgblack@eecs.umich.edu 'PARAMS', 1834483Sgblack@eecs.umich.edu 1844483Sgblack@eecs.umich.edu 'LPAREN', 'RPAREN', 1854483Sgblack@eecs.umich.edu 'LBRACE', 'RBRACE', 1864483Sgblack@eecs.umich.edu 'COLON', 'SEMI', 'DOT', 1874483Sgblack@eecs.umich.edu 'NEWLINE' 1884483Sgblack@eecs.umich.edu ) 1894483Sgblack@eecs.umich.edu 1904483Sgblack@eecs.umich.edu# New lines are ignored at the top level, but they end statements in the 1914483Sgblack@eecs.umich.edu# assembler 1924483Sgblack@eecs.umich.edustates = ( 1934483Sgblack@eecs.umich.edu ('asm', 'exclusive'), 1944483Sgblack@eecs.umich.edu ('params', 'exclusive'), 1954483Sgblack@eecs.umich.edu) 1964483Sgblack@eecs.umich.edu 1974483Sgblack@eecs.umich.edureserved_map = { } 1984483Sgblack@eecs.umich.edufor r in reserved: 1994483Sgblack@eecs.umich.edu reserved_map[r.lower()] = r 2004483Sgblack@eecs.umich.edu 2014512Sgblack@eecs.umich.edu# Ignore comments 2024502Sgblack@eecs.umich.edudef t_ANY_COMMENT(t): 2034502Sgblack@eecs.umich.edu r'\#[^\n]*(?=\n)' 2044502Sgblack@eecs.umich.edu 2054502Sgblack@eecs.umich.edudef t_ANY_MULTILINECOMMENT(t): 2064502Sgblack@eecs.umich.edu r'/\*([^/]|((?<!\*)/))*\*/' 2074502Sgblack@eecs.umich.edu 2084512Sgblack@eecs.umich.edu# A colon marks the end of a label. It should follow an ID which will 2094512Sgblack@eecs.umich.edu# put the lexer in the "params" state. Seeing the colon will put it back 2104512Sgblack@eecs.umich.edu# in the "asm" state since it knows it saw a label and not a mnemonic. 2114483Sgblack@eecs.umich.edudef t_params_COLON(t): 2124483Sgblack@eecs.umich.edu r':' 2134483Sgblack@eecs.umich.edu t.lexer.begin('asm') 2144483Sgblack@eecs.umich.edu return t 2154483Sgblack@eecs.umich.edu 2164512Sgblack@eecs.umich.edu# An "ID" in the micro assembler is either a label, directive, or mnemonic 2174512Sgblack@eecs.umich.edu# If it's either a directive or a mnemonic, it will be optionally followed by 2184512Sgblack@eecs.umich.edu# parameters. If it's a label, the following colon will make the lexer stop 2194512Sgblack@eecs.umich.edu# looking for parameters. 2204483Sgblack@eecs.umich.edudef t_asm_ID(t): 2214483Sgblack@eecs.umich.edu r'[A-Za-z_]\w*' 2224483Sgblack@eecs.umich.edu t.type = reserved_map.get(t.value, 'ID') 2234483Sgblack@eecs.umich.edu t.lexer.begin('params') 2244483Sgblack@eecs.umich.edu return t 2254483Sgblack@eecs.umich.edu 2264512Sgblack@eecs.umich.edu# If there is a label and you're -not- in the assember (which would be caught 2274512Sgblack@eecs.umich.edu# above), don't start looking for parameters. 2284483Sgblack@eecs.umich.edudef t_ANY_ID(t): 2294483Sgblack@eecs.umich.edu r'[A-Za-z_]\w*' 2304483Sgblack@eecs.umich.edu t.type = reserved_map.get(t.value, 'ID') 2314483Sgblack@eecs.umich.edu return t 2324483Sgblack@eecs.umich.edu 2334512Sgblack@eecs.umich.edu# Parameters are a string of text which don't contain an unescaped statement 2344512Sgblack@eecs.umich.edu# statement terminator, ie a newline or semi colon. 2354483Sgblack@eecs.umich.edudef t_params_PARAMS(t): 2364566Sgblack@eecs.umich.edu r'([^\n;\\]|(\\[\n;\\]))+' 2374483Sgblack@eecs.umich.edu t.lineno += t.value.count('\n') 2384566Sgblack@eecs.umich.edu unescapeParamsRE = re.compile(r'(\\[\n;\\])') 2394566Sgblack@eecs.umich.edu def unescapeParams(mo): 2404566Sgblack@eecs.umich.edu val = mo.group(0) 2414566Sgblack@eecs.umich.edu print "About to sub %s for %s" % (val[1], val) 2424566Sgblack@eecs.umich.edu return val[1] 2434566Sgblack@eecs.umich.edu print "Looking for matches in %s" % t.value 2444566Sgblack@eecs.umich.edu t.value = unescapeParamsRE.sub(unescapeParams, t.value) 2454483Sgblack@eecs.umich.edu t.lexer.begin('asm') 2464483Sgblack@eecs.umich.edu return t 2474483Sgblack@eecs.umich.edu 2484512Sgblack@eecs.umich.edu# Braces enter and exit micro assembly 2494483Sgblack@eecs.umich.edudef t_INITIAL_LBRACE(t): 2504483Sgblack@eecs.umich.edu r'\{' 2514483Sgblack@eecs.umich.edu t.lexer.begin('asm') 2524483Sgblack@eecs.umich.edu return t 2534483Sgblack@eecs.umich.edu 2544483Sgblack@eecs.umich.edudef t_asm_RBRACE(t): 2554483Sgblack@eecs.umich.edu r'\}' 2564483Sgblack@eecs.umich.edu t.lexer.begin('INITIAL') 2574483Sgblack@eecs.umich.edu return t 2584483Sgblack@eecs.umich.edu 2594512Sgblack@eecs.umich.edu# At the top level, keep track of newlines only for line counting. 2604483Sgblack@eecs.umich.edudef t_INITIAL_NEWLINE(t): 2614483Sgblack@eecs.umich.edu r'\n+' 2624483Sgblack@eecs.umich.edu t.lineno += t.value.count('\n') 2634483Sgblack@eecs.umich.edu 2644512Sgblack@eecs.umich.edu# In the micro assembler, do line counting but also return a token. The 2654512Sgblack@eecs.umich.edu# token is needed by the parser to detect the end of a statement. 2664483Sgblack@eecs.umich.edudef t_asm_NEWLINE(t): 2674483Sgblack@eecs.umich.edu r'\n+' 2684483Sgblack@eecs.umich.edu t.lineno += t.value.count('\n') 2694483Sgblack@eecs.umich.edu return t 2704483Sgblack@eecs.umich.edu 2714512Sgblack@eecs.umich.edu# A newline or semi colon when looking for params signals that the statement 2724512Sgblack@eecs.umich.edu# is over and the lexer should go back to looking for regular assembly. 2734483Sgblack@eecs.umich.edudef t_params_NEWLINE(t): 2744483Sgblack@eecs.umich.edu r'\n+' 2754483Sgblack@eecs.umich.edu t.lineno += t.value.count('\n') 2764483Sgblack@eecs.umich.edu t.lexer.begin('asm') 2774483Sgblack@eecs.umich.edu return t 2784483Sgblack@eecs.umich.edu 2794483Sgblack@eecs.umich.edudef t_params_SEMI(t): 2804483Sgblack@eecs.umich.edu r';' 2814483Sgblack@eecs.umich.edu t.lexer.begin('asm') 2824483Sgblack@eecs.umich.edu return t 2834483Sgblack@eecs.umich.edu 2844483Sgblack@eecs.umich.edu# Basic regular expressions to pick out simple tokens 2854483Sgblack@eecs.umich.edut_ANY_LPAREN = r'\(' 2864483Sgblack@eecs.umich.edut_ANY_RPAREN = r'\)' 2874483Sgblack@eecs.umich.edut_ANY_SEMI = r';' 2884483Sgblack@eecs.umich.edut_ANY_DOT = r'\.' 2894483Sgblack@eecs.umich.edu 2904483Sgblack@eecs.umich.edut_ANY_ignore = ' \t\x0c' 2914483Sgblack@eecs.umich.edu 2924483Sgblack@eecs.umich.edudef t_ANY_error(t): 2934483Sgblack@eecs.umich.edu error(t.lineno, "illegal character '%s'" % t.value[0]) 2944483Sgblack@eecs.umich.edu t.skip(1) 2954483Sgblack@eecs.umich.edu 2964483Sgblack@eecs.umich.edu########################################################################## 2974483Sgblack@eecs.umich.edu# 2984483Sgblack@eecs.umich.edu# Parser specification 2994483Sgblack@eecs.umich.edu# 3004483Sgblack@eecs.umich.edu########################################################################## 3014483Sgblack@eecs.umich.edu 3024483Sgblack@eecs.umich.edu# Start symbol for a file which may have more than one macroop or rom 3034483Sgblack@eecs.umich.edu# specification. 3044483Sgblack@eecs.umich.edudef p_file(t): 3054483Sgblack@eecs.umich.edu 'file : opt_rom_or_macros' 3064483Sgblack@eecs.umich.edu 3074483Sgblack@eecs.umich.edudef p_opt_rom_or_macros_0(t): 3084483Sgblack@eecs.umich.edu 'opt_rom_or_macros : ' 3094483Sgblack@eecs.umich.edu 3104483Sgblack@eecs.umich.edudef p_opt_rom_or_macros_1(t): 3114483Sgblack@eecs.umich.edu 'opt_rom_or_macros : rom_or_macros' 3124483Sgblack@eecs.umich.edu 3134483Sgblack@eecs.umich.edudef p_rom_or_macros_0(t): 3144483Sgblack@eecs.umich.edu 'rom_or_macros : rom_or_macro' 3154483Sgblack@eecs.umich.edu 3164483Sgblack@eecs.umich.edudef p_rom_or_macros_1(t): 3174483Sgblack@eecs.umich.edu 'rom_or_macros : rom_or_macros rom_or_macro' 3184483Sgblack@eecs.umich.edu 3194483Sgblack@eecs.umich.edudef p_rom_or_macro_0(t): 3204512Sgblack@eecs.umich.edu '''rom_or_macro : rom_block 3214512Sgblack@eecs.umich.edu | macroop_def''' 3224483Sgblack@eecs.umich.edu 3234483Sgblack@eecs.umich.edu# Defines a section of microcode that should go in the current ROM 3244483Sgblack@eecs.umich.edudef p_rom_block(t): 3254483Sgblack@eecs.umich.edu 'rom_block : DEF ROM block SEMI' 3264507Sgblack@eecs.umich.edu if not t.parser.rom: 3274507Sgblack@eecs.umich.edu print_error("Rom block found, but no Rom object specified.") 3284507Sgblack@eecs.umich.edu raise TypeError, "Rom block found, but no Rom object was specified." 3294483Sgblack@eecs.umich.edu for statement in t[3].statements: 3304483Sgblack@eecs.umich.edu handle_statement(t.parser, t.parser.rom, statement) 3314483Sgblack@eecs.umich.edu t[0] = t.parser.rom 3324483Sgblack@eecs.umich.edu 3334483Sgblack@eecs.umich.edu# Defines a macroop that jumps to an external label in the ROM 3344483Sgblack@eecs.umich.edudef p_macroop_def_0(t): 3354502Sgblack@eecs.umich.edu 'macroop_def : DEF MACROOP ID LPAREN ID RPAREN SEMI' 3364507Sgblack@eecs.umich.edu if not t.parser.rom_macroop_type: 3374507Sgblack@eecs.umich.edu print_error("ROM based macroop found, but no ROM macroop class was specified.") 3384507Sgblack@eecs.umich.edu raise TypeError, "ROM based macroop found, but no ROM macroop class was specified." 3394507Sgblack@eecs.umich.edu macroop = t.parser.rom_macroop_type(t[3], t[5]) 3404508Sgblack@eecs.umich.edu t.parser.macroops[t[3]] = macroop 3414507Sgblack@eecs.umich.edu 3424483Sgblack@eecs.umich.edu 3434483Sgblack@eecs.umich.edu# Defines a macroop that is combinationally generated 3444483Sgblack@eecs.umich.edudef p_macroop_def_1(t): 3454483Sgblack@eecs.umich.edu 'macroop_def : DEF MACROOP ID block SEMI' 3464483Sgblack@eecs.umich.edu try: 3474483Sgblack@eecs.umich.edu curop = t.parser.macro_type(t[3]) 3484483Sgblack@eecs.umich.edu except TypeError: 3494483Sgblack@eecs.umich.edu print_error("Error creating macroop object.") 3504483Sgblack@eecs.umich.edu raise 3514483Sgblack@eecs.umich.edu for statement in t[4].statements: 3524483Sgblack@eecs.umich.edu handle_statement(t.parser, curop, statement) 3534502Sgblack@eecs.umich.edu t.parser.macroops[t[3]] = curop 3544483Sgblack@eecs.umich.edu 3554512Sgblack@eecs.umich.edu# A block of statements 3564512Sgblack@eecs.umich.edudef p_block(t): 3574512Sgblack@eecs.umich.edu 'block : LBRACE statements RBRACE' 3584512Sgblack@eecs.umich.edu block = Block() 3594512Sgblack@eecs.umich.edu block.statements = t[2] 3604512Sgblack@eecs.umich.edu t[0] = block 3614512Sgblack@eecs.umich.edu 3624483Sgblack@eecs.umich.edudef p_statements_0(t): 3634483Sgblack@eecs.umich.edu 'statements : statement' 3644483Sgblack@eecs.umich.edu if t[1]: 3654483Sgblack@eecs.umich.edu t[0] = [t[1]] 3664483Sgblack@eecs.umich.edu else: 3674483Sgblack@eecs.umich.edu t[0] = [] 3684483Sgblack@eecs.umich.edu 3694483Sgblack@eecs.umich.edudef p_statements_1(t): 3704483Sgblack@eecs.umich.edu 'statements : statements statement' 3714483Sgblack@eecs.umich.edu if t[2]: 3724483Sgblack@eecs.umich.edu t[1].append(t[2]) 3734483Sgblack@eecs.umich.edu t[0] = t[1] 3744483Sgblack@eecs.umich.edu 3754483Sgblack@eecs.umich.edudef p_statement(t): 3764483Sgblack@eecs.umich.edu 'statement : content_of_statement end_of_statement' 3774483Sgblack@eecs.umich.edu t[0] = t[1] 3784483Sgblack@eecs.umich.edu 3794483Sgblack@eecs.umich.edu# A statement can be a microop or an assembler directive 3804483Sgblack@eecs.umich.edudef p_content_of_statement_0(t): 3814483Sgblack@eecs.umich.edu '''content_of_statement : microop 3824483Sgblack@eecs.umich.edu | directive''' 3834483Sgblack@eecs.umich.edu t[0] = t[1] 3844483Sgblack@eecs.umich.edu 3854512Sgblack@eecs.umich.edu# Ignore empty statements 3864483Sgblack@eecs.umich.edudef p_content_of_statement_1(t): 3874483Sgblack@eecs.umich.edu 'content_of_statement : ' 3884483Sgblack@eecs.umich.edu pass 3894483Sgblack@eecs.umich.edu 3904483Sgblack@eecs.umich.edu# Statements are ended by newlines or a semi colon 3914483Sgblack@eecs.umich.edudef p_end_of_statement(t): 3924483Sgblack@eecs.umich.edu '''end_of_statement : NEWLINE 3934483Sgblack@eecs.umich.edu | SEMI''' 3944483Sgblack@eecs.umich.edu pass 3954483Sgblack@eecs.umich.edu 3964512Sgblack@eecs.umich.edu# Different flavors of microop to avoid shift/reduce errors 3974483Sgblack@eecs.umich.edudef p_microop_0(t): 3984483Sgblack@eecs.umich.edu 'microop : labels ID' 3994483Sgblack@eecs.umich.edu microop = Microop() 4004483Sgblack@eecs.umich.edu microop.labels = t[1] 4014483Sgblack@eecs.umich.edu microop.mnemonic = t[2] 4024483Sgblack@eecs.umich.edu t[0] = microop 4034483Sgblack@eecs.umich.edu 4044483Sgblack@eecs.umich.edudef p_microop_1(t): 4054483Sgblack@eecs.umich.edu 'microop : ID' 4064483Sgblack@eecs.umich.edu microop = Microop() 4074483Sgblack@eecs.umich.edu microop.mnemonic = t[1] 4084483Sgblack@eecs.umich.edu t[0] = microop 4094483Sgblack@eecs.umich.edu 4104483Sgblack@eecs.umich.edudef p_microop_2(t): 4114483Sgblack@eecs.umich.edu 'microop : labels ID PARAMS' 4124483Sgblack@eecs.umich.edu microop = Microop() 4134483Sgblack@eecs.umich.edu microop.labels = t[1] 4144483Sgblack@eecs.umich.edu microop.mnemonic = t[2] 4154483Sgblack@eecs.umich.edu microop.params = t[3] 4164483Sgblack@eecs.umich.edu t[0] = microop 4174483Sgblack@eecs.umich.edu 4184483Sgblack@eecs.umich.edudef p_microop_3(t): 4194483Sgblack@eecs.umich.edu 'microop : ID PARAMS' 4204483Sgblack@eecs.umich.edu microop = Microop() 4214483Sgblack@eecs.umich.edu microop.mnemonic = t[1] 4224483Sgblack@eecs.umich.edu microop.params = t[2] 4234483Sgblack@eecs.umich.edu t[0] = microop 4244483Sgblack@eecs.umich.edu 4254512Sgblack@eecs.umich.edu# Labels in the microcode 4264483Sgblack@eecs.umich.edudef p_labels_0(t): 4274483Sgblack@eecs.umich.edu 'labels : label' 4284483Sgblack@eecs.umich.edu t[0] = [t[1]] 4294483Sgblack@eecs.umich.edu 4304483Sgblack@eecs.umich.edudef p_labels_1(t): 4314483Sgblack@eecs.umich.edu 'labels : labels label' 4324483Sgblack@eecs.umich.edu t[1].append(t[2]) 4334483Sgblack@eecs.umich.edu t[0] = t[1] 4344483Sgblack@eecs.umich.edu 4354483Sgblack@eecs.umich.edudef p_label_0(t): 4364483Sgblack@eecs.umich.edu 'label : ID COLON' 4374483Sgblack@eecs.umich.edu label = Label() 4384483Sgblack@eecs.umich.edu label.is_extern = False 4394483Sgblack@eecs.umich.edu label.text = t[1] 4404483Sgblack@eecs.umich.edu t[0] = label 4414483Sgblack@eecs.umich.edu 4424483Sgblack@eecs.umich.edudef p_label_1(t): 4434483Sgblack@eecs.umich.edu 'label : EXTERN ID COLON' 4444483Sgblack@eecs.umich.edu label = Label() 4454483Sgblack@eecs.umich.edu label.is_extern = True 4464483Sgblack@eecs.umich.edu label.text = t[2] 4474483Sgblack@eecs.umich.edu t[0] = label 4484483Sgblack@eecs.umich.edu 4494512Sgblack@eecs.umich.edu# Directives for the macroop 4504503Sgblack@eecs.umich.edudef p_directive_0(t): 4514483Sgblack@eecs.umich.edu 'directive : DOT ID' 4524483Sgblack@eecs.umich.edu directive = Directive() 4534483Sgblack@eecs.umich.edu directive.name = t[2] 4544483Sgblack@eecs.umich.edu t[0] = directive 4554483Sgblack@eecs.umich.edu 4564503Sgblack@eecs.umich.edudef p_directive_1(t): 4574503Sgblack@eecs.umich.edu 'directive : DOT ID PARAMS' 4584503Sgblack@eecs.umich.edu directive = Directive() 4594503Sgblack@eecs.umich.edu directive.name = t[2] 4604503Sgblack@eecs.umich.edu directive.params = t[3] 4614503Sgblack@eecs.umich.edu t[0] = directive 4624503Sgblack@eecs.umich.edu 4634483Sgblack@eecs.umich.edu# Parse error handler. Note that the argument here is the offending 4644483Sgblack@eecs.umich.edu# *token*, not a grammar symbol (hence the need to use t.value) 4654483Sgblack@eecs.umich.edudef p_error(t): 4664483Sgblack@eecs.umich.edu if t: 4674483Sgblack@eecs.umich.edu error(t.lineno, "syntax error at '%s'" % t.value) 4684483Sgblack@eecs.umich.edu else: 4694483Sgblack@eecs.umich.edu error(0, "unknown syntax error", True) 4704483Sgblack@eecs.umich.edu 4714483Sgblack@eecs.umich.educlass MicroAssembler(object): 4724483Sgblack@eecs.umich.edu 4734507Sgblack@eecs.umich.edu def __init__(self, macro_type, microops, 4744507Sgblack@eecs.umich.edu rom = None, rom_macroop_type = None): 4754483Sgblack@eecs.umich.edu self.lexer = lex.lex() 4764483Sgblack@eecs.umich.edu self.parser = yacc.yacc() 4774483Sgblack@eecs.umich.edu self.parser.macro_type = macro_type 4784502Sgblack@eecs.umich.edu self.parser.macroops = {} 4794483Sgblack@eecs.umich.edu self.parser.microops = microops 4804483Sgblack@eecs.umich.edu self.parser.rom = rom 4814507Sgblack@eecs.umich.edu self.parser.rom_macroop_type = rom_macroop_type 4824483Sgblack@eecs.umich.edu 4834483Sgblack@eecs.umich.edu def assemble(self, asm): 4844483Sgblack@eecs.umich.edu self.parser.parse(asm, lexer=self.lexer) 4854502Sgblack@eecs.umich.edu # Begin debug printing 4864502Sgblack@eecs.umich.edu for macroop in self.parser.macroops.values(): 4874483Sgblack@eecs.umich.edu print macroop 4884483Sgblack@eecs.umich.edu print self.parser.rom 4894502Sgblack@eecs.umich.edu # End debug printing 4904483Sgblack@eecs.umich.edu macroops = self.parser.macroops 4914502Sgblack@eecs.umich.edu self.parser.macroops = {} 4924483Sgblack@eecs.umich.edu return macroops 493