micro_asm.py revision 4512
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: 1344483Sgblack@eecs.umich.edu print_error("Error creating microop object.") 1354483Sgblack@eecs.umich.edu raise 1364483Sgblack@eecs.umich.edu try: 1374483Sgblack@eecs.umich.edu for label in statement.labels: 1384483Sgblack@eecs.umich.edu container.labels[label.name] = microop 1394483Sgblack@eecs.umich.edu if label.extern: 1404483Sgblack@eecs.umich.edu container.externs[label.name] = microop 1414483Sgblack@eecs.umich.edu container.add_microop(microop) 1424483Sgblack@eecs.umich.edu except: 1434483Sgblack@eecs.umich.edu print_error("Error adding microop.") 1444483Sgblack@eecs.umich.edu raise 1454483Sgblack@eecs.umich.edu elif statement.is_directive: 1464483Sgblack@eecs.umich.edu try: 1474503Sgblack@eecs.umich.edu eval('container.directives[statement.name](%s)' % statement.params) 1484483Sgblack@eecs.umich.edu except: 1494483Sgblack@eecs.umich.edu print_error("Error executing directive.") 1504483Sgblack@eecs.umich.edu print container.directives 1514483Sgblack@eecs.umich.edu raise 1524483Sgblack@eecs.umich.edu else: 1534483Sgblack@eecs.umich.edu raise Exception, "Didn't recognize the type of statement", statement 1544483Sgblack@eecs.umich.edu 1554483Sgblack@eecs.umich.edu########################################################################## 1564483Sgblack@eecs.umich.edu# 1574483Sgblack@eecs.umich.edu# Lexer specification 1584483Sgblack@eecs.umich.edu# 1594483Sgblack@eecs.umich.edu########################################################################## 1604483Sgblack@eecs.umich.edu 1614483Sgblack@eecs.umich.edu# Error handler. Just call exit. Output formatted to work under 1624483Sgblack@eecs.umich.edu# Emacs compile-mode. Optional 'print_traceback' arg, if set to True, 1634483Sgblack@eecs.umich.edu# prints a Python stack backtrace too (can be handy when trying to 1644483Sgblack@eecs.umich.edu# debug the parser itself). 1654483Sgblack@eecs.umich.edudef error(lineno, string, print_traceback = False): 1664483Sgblack@eecs.umich.edu # Print a Python stack backtrace if requested. 1674483Sgblack@eecs.umich.edu if (print_traceback): 1684483Sgblack@eecs.umich.edu traceback.print_exc() 1694483Sgblack@eecs.umich.edu if lineno != 0: 1704483Sgblack@eecs.umich.edu line_str = "%d:" % lineno 1714483Sgblack@eecs.umich.edu else: 1724483Sgblack@eecs.umich.edu line_str = "" 1734483Sgblack@eecs.umich.edu sys.exit("%s %s" % (line_str, string)) 1744483Sgblack@eecs.umich.edu 1754483Sgblack@eecs.umich.edureserved = ('DEF', 'MACROOP', 'ROM', 'EXTERN') 1764483Sgblack@eecs.umich.edu 1774483Sgblack@eecs.umich.edutokens = reserved + ( 1784483Sgblack@eecs.umich.edu # identifier 1794483Sgblack@eecs.umich.edu 'ID', 1804483Sgblack@eecs.umich.edu # arguments for microops and directives 1814483Sgblack@eecs.umich.edu 'PARAMS', 1824483Sgblack@eecs.umich.edu 1834483Sgblack@eecs.umich.edu 'LPAREN', 'RPAREN', 1844483Sgblack@eecs.umich.edu 'LBRACE', 'RBRACE', 1854483Sgblack@eecs.umich.edu 'COLON', 'SEMI', 'DOT', 1864483Sgblack@eecs.umich.edu 'NEWLINE' 1874483Sgblack@eecs.umich.edu ) 1884483Sgblack@eecs.umich.edu 1894483Sgblack@eecs.umich.edu# New lines are ignored at the top level, but they end statements in the 1904483Sgblack@eecs.umich.edu# assembler 1914483Sgblack@eecs.umich.edustates = ( 1924483Sgblack@eecs.umich.edu ('asm', 'exclusive'), 1934483Sgblack@eecs.umich.edu ('params', 'exclusive'), 1944483Sgblack@eecs.umich.edu) 1954483Sgblack@eecs.umich.edu 1964483Sgblack@eecs.umich.edureserved_map = { } 1974483Sgblack@eecs.umich.edufor r in reserved: 1984483Sgblack@eecs.umich.edu reserved_map[r.lower()] = r 1994483Sgblack@eecs.umich.edu 2004512Sgblack@eecs.umich.edu# Ignore comments 2014502Sgblack@eecs.umich.edudef t_ANY_COMMENT(t): 2024502Sgblack@eecs.umich.edu r'\#[^\n]*(?=\n)' 2034502Sgblack@eecs.umich.edu 2044502Sgblack@eecs.umich.edudef t_ANY_MULTILINECOMMENT(t): 2054502Sgblack@eecs.umich.edu r'/\*([^/]|((?<!\*)/))*\*/' 2064502Sgblack@eecs.umich.edu 2074512Sgblack@eecs.umich.edu# A colon marks the end of a label. It should follow an ID which will 2084512Sgblack@eecs.umich.edu# put the lexer in the "params" state. Seeing the colon will put it back 2094512Sgblack@eecs.umich.edu# in the "asm" state since it knows it saw a label and not a mnemonic. 2104483Sgblack@eecs.umich.edudef t_params_COLON(t): 2114483Sgblack@eecs.umich.edu r':' 2124483Sgblack@eecs.umich.edu t.lexer.begin('asm') 2134483Sgblack@eecs.umich.edu return t 2144483Sgblack@eecs.umich.edu 2154512Sgblack@eecs.umich.edu# An "ID" in the micro assembler is either a label, directive, or mnemonic 2164512Sgblack@eecs.umich.edu# If it's either a directive or a mnemonic, it will be optionally followed by 2174512Sgblack@eecs.umich.edu# parameters. If it's a label, the following colon will make the lexer stop 2184512Sgblack@eecs.umich.edu# looking for parameters. 2194483Sgblack@eecs.umich.edudef t_asm_ID(t): 2204483Sgblack@eecs.umich.edu r'[A-Za-z_]\w*' 2214483Sgblack@eecs.umich.edu t.type = reserved_map.get(t.value, 'ID') 2224483Sgblack@eecs.umich.edu t.lexer.begin('params') 2234483Sgblack@eecs.umich.edu return t 2244483Sgblack@eecs.umich.edu 2254512Sgblack@eecs.umich.edu# If there is a label and you're -not- in the assember (which would be caught 2264512Sgblack@eecs.umich.edu# above), don't start looking for parameters. 2274483Sgblack@eecs.umich.edudef t_ANY_ID(t): 2284483Sgblack@eecs.umich.edu r'[A-Za-z_]\w*' 2294483Sgblack@eecs.umich.edu t.type = reserved_map.get(t.value, 'ID') 2304483Sgblack@eecs.umich.edu return t 2314483Sgblack@eecs.umich.edu 2324512Sgblack@eecs.umich.edu# Parameters are a string of text which don't contain an unescaped statement 2334512Sgblack@eecs.umich.edu# statement terminator, ie a newline or semi colon. 2344483Sgblack@eecs.umich.edudef t_params_PARAMS(t): 2354483Sgblack@eecs.umich.edu r'([^\n;]|((?<=\\)[\n;]))+' 2364483Sgblack@eecs.umich.edu t.lineno += t.value.count('\n') 2374483Sgblack@eecs.umich.edu t.lexer.begin('asm') 2384483Sgblack@eecs.umich.edu return t 2394483Sgblack@eecs.umich.edu 2404512Sgblack@eecs.umich.edu# Braces enter and exit micro assembly 2414483Sgblack@eecs.umich.edudef t_INITIAL_LBRACE(t): 2424483Sgblack@eecs.umich.edu r'\{' 2434483Sgblack@eecs.umich.edu t.lexer.begin('asm') 2444483Sgblack@eecs.umich.edu return t 2454483Sgblack@eecs.umich.edu 2464483Sgblack@eecs.umich.edudef t_asm_RBRACE(t): 2474483Sgblack@eecs.umich.edu r'\}' 2484483Sgblack@eecs.umich.edu t.lexer.begin('INITIAL') 2494483Sgblack@eecs.umich.edu return t 2504483Sgblack@eecs.umich.edu 2514512Sgblack@eecs.umich.edu# At the top level, keep track of newlines only for line counting. 2524483Sgblack@eecs.umich.edudef t_INITIAL_NEWLINE(t): 2534483Sgblack@eecs.umich.edu r'\n+' 2544483Sgblack@eecs.umich.edu t.lineno += t.value.count('\n') 2554483Sgblack@eecs.umich.edu 2564512Sgblack@eecs.umich.edu# In the micro assembler, do line counting but also return a token. The 2574512Sgblack@eecs.umich.edu# token is needed by the parser to detect the end of a statement. 2584483Sgblack@eecs.umich.edudef t_asm_NEWLINE(t): 2594483Sgblack@eecs.umich.edu r'\n+' 2604483Sgblack@eecs.umich.edu t.lineno += t.value.count('\n') 2614483Sgblack@eecs.umich.edu return t 2624483Sgblack@eecs.umich.edu 2634512Sgblack@eecs.umich.edu# A newline or semi colon when looking for params signals that the statement 2644512Sgblack@eecs.umich.edu# is over and the lexer should go back to looking for regular assembly. 2654483Sgblack@eecs.umich.edudef t_params_NEWLINE(t): 2664483Sgblack@eecs.umich.edu r'\n+' 2674483Sgblack@eecs.umich.edu t.lineno += t.value.count('\n') 2684483Sgblack@eecs.umich.edu t.lexer.begin('asm') 2694483Sgblack@eecs.umich.edu return t 2704483Sgblack@eecs.umich.edu 2714483Sgblack@eecs.umich.edudef t_params_SEMI(t): 2724483Sgblack@eecs.umich.edu r';' 2734483Sgblack@eecs.umich.edu t.lexer.begin('asm') 2744483Sgblack@eecs.umich.edu return t 2754483Sgblack@eecs.umich.edu 2764483Sgblack@eecs.umich.edu# Basic regular expressions to pick out simple tokens 2774483Sgblack@eecs.umich.edut_ANY_LPAREN = r'\(' 2784483Sgblack@eecs.umich.edut_ANY_RPAREN = r'\)' 2794483Sgblack@eecs.umich.edut_ANY_SEMI = r';' 2804483Sgblack@eecs.umich.edut_ANY_DOT = r'\.' 2814483Sgblack@eecs.umich.edu 2824483Sgblack@eecs.umich.edut_ANY_ignore = ' \t\x0c' 2834483Sgblack@eecs.umich.edu 2844483Sgblack@eecs.umich.edudef t_ANY_error(t): 2854483Sgblack@eecs.umich.edu error(t.lineno, "illegal character '%s'" % t.value[0]) 2864483Sgblack@eecs.umich.edu t.skip(1) 2874483Sgblack@eecs.umich.edu 2884483Sgblack@eecs.umich.edu########################################################################## 2894483Sgblack@eecs.umich.edu# 2904483Sgblack@eecs.umich.edu# Parser specification 2914483Sgblack@eecs.umich.edu# 2924483Sgblack@eecs.umich.edu########################################################################## 2934483Sgblack@eecs.umich.edu 2944483Sgblack@eecs.umich.edu# Start symbol for a file which may have more than one macroop or rom 2954483Sgblack@eecs.umich.edu# specification. 2964483Sgblack@eecs.umich.edudef p_file(t): 2974483Sgblack@eecs.umich.edu 'file : opt_rom_or_macros' 2984483Sgblack@eecs.umich.edu 2994483Sgblack@eecs.umich.edudef p_opt_rom_or_macros_0(t): 3004483Sgblack@eecs.umich.edu 'opt_rom_or_macros : ' 3014483Sgblack@eecs.umich.edu 3024483Sgblack@eecs.umich.edudef p_opt_rom_or_macros_1(t): 3034483Sgblack@eecs.umich.edu 'opt_rom_or_macros : rom_or_macros' 3044483Sgblack@eecs.umich.edu 3054483Sgblack@eecs.umich.edudef p_rom_or_macros_0(t): 3064483Sgblack@eecs.umich.edu 'rom_or_macros : rom_or_macro' 3074483Sgblack@eecs.umich.edu 3084483Sgblack@eecs.umich.edudef p_rom_or_macros_1(t): 3094483Sgblack@eecs.umich.edu 'rom_or_macros : rom_or_macros rom_or_macro' 3104483Sgblack@eecs.umich.edu 3114483Sgblack@eecs.umich.edudef p_rom_or_macro_0(t): 3124512Sgblack@eecs.umich.edu '''rom_or_macro : rom_block 3134512Sgblack@eecs.umich.edu | macroop_def''' 3144483Sgblack@eecs.umich.edu 3154483Sgblack@eecs.umich.edu# Defines a section of microcode that should go in the current ROM 3164483Sgblack@eecs.umich.edudef p_rom_block(t): 3174483Sgblack@eecs.umich.edu 'rom_block : DEF ROM block SEMI' 3184507Sgblack@eecs.umich.edu if not t.parser.rom: 3194507Sgblack@eecs.umich.edu print_error("Rom block found, but no Rom object specified.") 3204507Sgblack@eecs.umich.edu raise TypeError, "Rom block found, but no Rom object was specified." 3214483Sgblack@eecs.umich.edu for statement in t[3].statements: 3224483Sgblack@eecs.umich.edu handle_statement(t.parser, t.parser.rom, statement) 3234483Sgblack@eecs.umich.edu t[0] = t.parser.rom 3244483Sgblack@eecs.umich.edu 3254483Sgblack@eecs.umich.edu# Defines a macroop that jumps to an external label in the ROM 3264483Sgblack@eecs.umich.edudef p_macroop_def_0(t): 3274502Sgblack@eecs.umich.edu 'macroop_def : DEF MACROOP ID LPAREN ID RPAREN SEMI' 3284507Sgblack@eecs.umich.edu if not t.parser.rom_macroop_type: 3294507Sgblack@eecs.umich.edu print_error("ROM based macroop found, but no ROM macroop class was specified.") 3304507Sgblack@eecs.umich.edu raise TypeError, "ROM based macroop found, but no ROM macroop class was specified." 3314507Sgblack@eecs.umich.edu macroop = t.parser.rom_macroop_type(t[3], t[5]) 3324508Sgblack@eecs.umich.edu t.parser.macroops[t[3]] = macroop 3334507Sgblack@eecs.umich.edu 3344483Sgblack@eecs.umich.edu 3354483Sgblack@eecs.umich.edu# Defines a macroop that is combinationally generated 3364483Sgblack@eecs.umich.edudef p_macroop_def_1(t): 3374483Sgblack@eecs.umich.edu 'macroop_def : DEF MACROOP ID block SEMI' 3384483Sgblack@eecs.umich.edu try: 3394483Sgblack@eecs.umich.edu curop = t.parser.macro_type(t[3]) 3404483Sgblack@eecs.umich.edu except TypeError: 3414483Sgblack@eecs.umich.edu print_error("Error creating macroop object.") 3424483Sgblack@eecs.umich.edu raise 3434483Sgblack@eecs.umich.edu for statement in t[4].statements: 3444483Sgblack@eecs.umich.edu handle_statement(t.parser, curop, statement) 3454502Sgblack@eecs.umich.edu t.parser.macroops[t[3]] = curop 3464483Sgblack@eecs.umich.edu 3474512Sgblack@eecs.umich.edu# A block of statements 3484512Sgblack@eecs.umich.edudef p_block(t): 3494512Sgblack@eecs.umich.edu 'block : LBRACE statements RBRACE' 3504512Sgblack@eecs.umich.edu block = Block() 3514512Sgblack@eecs.umich.edu block.statements = t[2] 3524512Sgblack@eecs.umich.edu t[0] = block 3534512Sgblack@eecs.umich.edu 3544483Sgblack@eecs.umich.edudef p_statements_0(t): 3554483Sgblack@eecs.umich.edu 'statements : statement' 3564483Sgblack@eecs.umich.edu if t[1]: 3574483Sgblack@eecs.umich.edu t[0] = [t[1]] 3584483Sgblack@eecs.umich.edu else: 3594483Sgblack@eecs.umich.edu t[0] = [] 3604483Sgblack@eecs.umich.edu 3614483Sgblack@eecs.umich.edudef p_statements_1(t): 3624483Sgblack@eecs.umich.edu 'statements : statements statement' 3634483Sgblack@eecs.umich.edu if t[2]: 3644483Sgblack@eecs.umich.edu t[1].append(t[2]) 3654483Sgblack@eecs.umich.edu t[0] = t[1] 3664483Sgblack@eecs.umich.edu 3674483Sgblack@eecs.umich.edudef p_statement(t): 3684483Sgblack@eecs.umich.edu 'statement : content_of_statement end_of_statement' 3694483Sgblack@eecs.umich.edu t[0] = t[1] 3704483Sgblack@eecs.umich.edu 3714483Sgblack@eecs.umich.edu# A statement can be a microop or an assembler directive 3724483Sgblack@eecs.umich.edudef p_content_of_statement_0(t): 3734483Sgblack@eecs.umich.edu '''content_of_statement : microop 3744483Sgblack@eecs.umich.edu | directive''' 3754483Sgblack@eecs.umich.edu t[0] = t[1] 3764483Sgblack@eecs.umich.edu 3774512Sgblack@eecs.umich.edu# Ignore empty statements 3784483Sgblack@eecs.umich.edudef p_content_of_statement_1(t): 3794483Sgblack@eecs.umich.edu 'content_of_statement : ' 3804483Sgblack@eecs.umich.edu pass 3814483Sgblack@eecs.umich.edu 3824483Sgblack@eecs.umich.edu# Statements are ended by newlines or a semi colon 3834483Sgblack@eecs.umich.edudef p_end_of_statement(t): 3844483Sgblack@eecs.umich.edu '''end_of_statement : NEWLINE 3854483Sgblack@eecs.umich.edu | SEMI''' 3864483Sgblack@eecs.umich.edu pass 3874483Sgblack@eecs.umich.edu 3884512Sgblack@eecs.umich.edu# Different flavors of microop to avoid shift/reduce errors 3894483Sgblack@eecs.umich.edudef p_microop_0(t): 3904483Sgblack@eecs.umich.edu 'microop : labels ID' 3914483Sgblack@eecs.umich.edu microop = Microop() 3924483Sgblack@eecs.umich.edu microop.labels = t[1] 3934483Sgblack@eecs.umich.edu microop.mnemonic = t[2] 3944483Sgblack@eecs.umich.edu t[0] = microop 3954483Sgblack@eecs.umich.edu 3964483Sgblack@eecs.umich.edudef p_microop_1(t): 3974483Sgblack@eecs.umich.edu 'microop : ID' 3984483Sgblack@eecs.umich.edu microop = Microop() 3994483Sgblack@eecs.umich.edu microop.mnemonic = t[1] 4004483Sgblack@eecs.umich.edu t[0] = microop 4014483Sgblack@eecs.umich.edu 4024483Sgblack@eecs.umich.edudef p_microop_2(t): 4034483Sgblack@eecs.umich.edu 'microop : labels ID PARAMS' 4044483Sgblack@eecs.umich.edu microop = Microop() 4054483Sgblack@eecs.umich.edu microop.labels = t[1] 4064483Sgblack@eecs.umich.edu microop.mnemonic = t[2] 4074483Sgblack@eecs.umich.edu microop.params = t[3] 4084483Sgblack@eecs.umich.edu t[0] = microop 4094483Sgblack@eecs.umich.edu 4104483Sgblack@eecs.umich.edudef p_microop_3(t): 4114483Sgblack@eecs.umich.edu 'microop : ID PARAMS' 4124483Sgblack@eecs.umich.edu microop = Microop() 4134483Sgblack@eecs.umich.edu microop.mnemonic = t[1] 4144483Sgblack@eecs.umich.edu microop.params = t[2] 4154483Sgblack@eecs.umich.edu t[0] = microop 4164483Sgblack@eecs.umich.edu 4174512Sgblack@eecs.umich.edu# Labels in the microcode 4184483Sgblack@eecs.umich.edudef p_labels_0(t): 4194483Sgblack@eecs.umich.edu 'labels : label' 4204483Sgblack@eecs.umich.edu t[0] = [t[1]] 4214483Sgblack@eecs.umich.edu 4224483Sgblack@eecs.umich.edudef p_labels_1(t): 4234483Sgblack@eecs.umich.edu 'labels : labels label' 4244483Sgblack@eecs.umich.edu t[1].append(t[2]) 4254483Sgblack@eecs.umich.edu t[0] = t[1] 4264483Sgblack@eecs.umich.edu 4274483Sgblack@eecs.umich.edudef p_label_0(t): 4284483Sgblack@eecs.umich.edu 'label : ID COLON' 4294483Sgblack@eecs.umich.edu label = Label() 4304483Sgblack@eecs.umich.edu label.is_extern = False 4314483Sgblack@eecs.umich.edu label.text = t[1] 4324483Sgblack@eecs.umich.edu t[0] = label 4334483Sgblack@eecs.umich.edu 4344483Sgblack@eecs.umich.edudef p_label_1(t): 4354483Sgblack@eecs.umich.edu 'label : EXTERN ID COLON' 4364483Sgblack@eecs.umich.edu label = Label() 4374483Sgblack@eecs.umich.edu label.is_extern = True 4384483Sgblack@eecs.umich.edu label.text = t[2] 4394483Sgblack@eecs.umich.edu t[0] = label 4404483Sgblack@eecs.umich.edu 4414512Sgblack@eecs.umich.edu# Directives for the macroop 4424503Sgblack@eecs.umich.edudef p_directive_0(t): 4434483Sgblack@eecs.umich.edu 'directive : DOT ID' 4444483Sgblack@eecs.umich.edu directive = Directive() 4454483Sgblack@eecs.umich.edu directive.name = t[2] 4464483Sgblack@eecs.umich.edu t[0] = directive 4474483Sgblack@eecs.umich.edu 4484503Sgblack@eecs.umich.edudef p_directive_1(t): 4494503Sgblack@eecs.umich.edu 'directive : DOT ID PARAMS' 4504503Sgblack@eecs.umich.edu directive = Directive() 4514503Sgblack@eecs.umich.edu directive.name = t[2] 4524503Sgblack@eecs.umich.edu directive.params = t[3] 4534503Sgblack@eecs.umich.edu t[0] = directive 4544503Sgblack@eecs.umich.edu 4554483Sgblack@eecs.umich.edu# Parse error handler. Note that the argument here is the offending 4564483Sgblack@eecs.umich.edu# *token*, not a grammar symbol (hence the need to use t.value) 4574483Sgblack@eecs.umich.edudef p_error(t): 4584483Sgblack@eecs.umich.edu if t: 4594483Sgblack@eecs.umich.edu error(t.lineno, "syntax error at '%s'" % t.value) 4604483Sgblack@eecs.umich.edu else: 4614483Sgblack@eecs.umich.edu error(0, "unknown syntax error", True) 4624483Sgblack@eecs.umich.edu 4634483Sgblack@eecs.umich.educlass MicroAssembler(object): 4644483Sgblack@eecs.umich.edu 4654507Sgblack@eecs.umich.edu def __init__(self, macro_type, microops, 4664507Sgblack@eecs.umich.edu rom = None, rom_macroop_type = None): 4674483Sgblack@eecs.umich.edu self.lexer = lex.lex() 4684483Sgblack@eecs.umich.edu self.parser = yacc.yacc() 4694483Sgblack@eecs.umich.edu self.parser.macro_type = macro_type 4704502Sgblack@eecs.umich.edu self.parser.macroops = {} 4714483Sgblack@eecs.umich.edu self.parser.microops = microops 4724483Sgblack@eecs.umich.edu self.parser.rom = rom 4734507Sgblack@eecs.umich.edu self.parser.rom_macroop_type = rom_macroop_type 4744483Sgblack@eecs.umich.edu 4754483Sgblack@eecs.umich.edu def assemble(self, asm): 4764483Sgblack@eecs.umich.edu self.parser.parse(asm, lexer=self.lexer) 4774502Sgblack@eecs.umich.edu # Begin debug printing 4784502Sgblack@eecs.umich.edu for macroop in self.parser.macroops.values(): 4794483Sgblack@eecs.umich.edu print macroop 4804483Sgblack@eecs.umich.edu print self.parser.rom 4814502Sgblack@eecs.umich.edu # End debug printing 4824483Sgblack@eecs.umich.edu macroops = self.parser.macroops 4834502Sgblack@eecs.umich.edu self.parser.macroops = {} 4844483Sgblack@eecs.umich.edu return macroops 485