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 2912563Sgabeblack@google.comfrom __future__ import print_function 3012563Sgabeblack@google.com 314483Sgblack@eecs.umich.eduimport os 324483Sgblack@eecs.umich.eduimport sys 334483Sgblack@eecs.umich.eduimport re 344483Sgblack@eecs.umich.eduimport string 354483Sgblack@eecs.umich.eduimport traceback 364483Sgblack@eecs.umich.edu# get type names 374483Sgblack@eecs.umich.edufrom types import * 384483Sgblack@eecs.umich.edu 394483Sgblack@eecs.umich.edufrom ply import lex 404483Sgblack@eecs.umich.edufrom ply import yacc 414483Sgblack@eecs.umich.edu 424483Sgblack@eecs.umich.edu########################################################################## 434483Sgblack@eecs.umich.edu# 444483Sgblack@eecs.umich.edu# Base classes for use outside of the assembler 454483Sgblack@eecs.umich.edu# 464483Sgblack@eecs.umich.edu########################################################################## 474483Sgblack@eecs.umich.edu 484483Sgblack@eecs.umich.educlass Micro_Container(object): 494483Sgblack@eecs.umich.edu def __init__(self, name): 504483Sgblack@eecs.umich.edu self.microops = [] 514483Sgblack@eecs.umich.edu self.name = name 524483Sgblack@eecs.umich.edu self.directives = {} 534483Sgblack@eecs.umich.edu self.micro_classes = {} 544483Sgblack@eecs.umich.edu self.labels = {} 554483Sgblack@eecs.umich.edu 565039Sgblack@eecs.umich.edu def add_microop(self, mnemonic, microop): 574483Sgblack@eecs.umich.edu self.microops.append(microop) 584483Sgblack@eecs.umich.edu 594483Sgblack@eecs.umich.edu def __str__(self): 604483Sgblack@eecs.umich.edu string = "%s:\n" % self.name 614483Sgblack@eecs.umich.edu for microop in self.microops: 624483Sgblack@eecs.umich.edu string += " %s\n" % microop 634483Sgblack@eecs.umich.edu return string 644483Sgblack@eecs.umich.edu 654507Sgblack@eecs.umich.educlass Combinational_Macroop(Micro_Container): 664483Sgblack@eecs.umich.edu pass 674483Sgblack@eecs.umich.edu 684507Sgblack@eecs.umich.educlass Rom_Macroop(object): 694507Sgblack@eecs.umich.edu def __init__(self, name, target): 704507Sgblack@eecs.umich.edu self.name = name 714507Sgblack@eecs.umich.edu self.target = target 724507Sgblack@eecs.umich.edu 734508Sgblack@eecs.umich.edu def __str__(self): 744508Sgblack@eecs.umich.edu return "%s: %s\n" % (self.name, self.target) 754508Sgblack@eecs.umich.edu 764483Sgblack@eecs.umich.educlass Rom(Micro_Container): 774483Sgblack@eecs.umich.edu def __init__(self, name): 784483Sgblack@eecs.umich.edu super(Rom, self).__init__(name) 794483Sgblack@eecs.umich.edu self.externs = {} 804483Sgblack@eecs.umich.edu 814483Sgblack@eecs.umich.edu########################################################################## 824483Sgblack@eecs.umich.edu# 834483Sgblack@eecs.umich.edu# Support classes 844483Sgblack@eecs.umich.edu# 854483Sgblack@eecs.umich.edu########################################################################## 864483Sgblack@eecs.umich.edu 874483Sgblack@eecs.umich.educlass Label(object): 884483Sgblack@eecs.umich.edu def __init__(self): 894483Sgblack@eecs.umich.edu self.extern = False 904483Sgblack@eecs.umich.edu self.name = "" 914483Sgblack@eecs.umich.edu 924483Sgblack@eecs.umich.educlass Block(object): 934483Sgblack@eecs.umich.edu def __init__(self): 944483Sgblack@eecs.umich.edu self.statements = [] 954483Sgblack@eecs.umich.edu 964483Sgblack@eecs.umich.educlass Statement(object): 974483Sgblack@eecs.umich.edu def __init__(self): 984483Sgblack@eecs.umich.edu self.is_microop = False 994483Sgblack@eecs.umich.edu self.is_directive = False 1004503Sgblack@eecs.umich.edu self.params = "" 1014483Sgblack@eecs.umich.edu 1024483Sgblack@eecs.umich.educlass Microop(Statement): 1034483Sgblack@eecs.umich.edu def __init__(self): 1044483Sgblack@eecs.umich.edu super(Microop, self).__init__() 1054483Sgblack@eecs.umich.edu self.mnemonic = "" 1064483Sgblack@eecs.umich.edu self.labels = [] 1074483Sgblack@eecs.umich.edu self.is_microop = True 1084483Sgblack@eecs.umich.edu 1094483Sgblack@eecs.umich.educlass Directive(Statement): 1104483Sgblack@eecs.umich.edu def __init__(self): 1114483Sgblack@eecs.umich.edu super(Directive, self).__init__() 1124483Sgblack@eecs.umich.edu self.name = "" 1134483Sgblack@eecs.umich.edu self.is_directive = True 1144483Sgblack@eecs.umich.edu 1154483Sgblack@eecs.umich.edu########################################################################## 1164483Sgblack@eecs.umich.edu# 1174483Sgblack@eecs.umich.edu# Functions that handle common tasks 1184483Sgblack@eecs.umich.edu# 1194483Sgblack@eecs.umich.edu########################################################################## 1204483Sgblack@eecs.umich.edu 1214483Sgblack@eecs.umich.edudef print_error(message): 12212563Sgabeblack@google.com print() 12312563Sgabeblack@google.com print("*** %s" % message) 12412563Sgabeblack@google.com print() 1254483Sgblack@eecs.umich.edu 1264483Sgblack@eecs.umich.edudef handle_statement(parser, container, statement): 1274483Sgblack@eecs.umich.edu if statement.is_microop: 1284613Sgblack@eecs.umich.edu if statement.mnemonic not in parser.microops.keys(): 1294613Sgblack@eecs.umich.edu raise Exception, "Unrecognized mnemonic: %s" % statement.mnemonic 1304613Sgblack@eecs.umich.edu parser.symbols["__microopClassFromInsideTheAssembler"] = \ 1314613Sgblack@eecs.umich.edu parser.microops[statement.mnemonic] 1324483Sgblack@eecs.umich.edu try: 1334613Sgblack@eecs.umich.edu microop = eval('__microopClassFromInsideTheAssembler(%s)' % 1344613Sgblack@eecs.umich.edu statement.params, {}, parser.symbols) 1354483Sgblack@eecs.umich.edu except: 1364591Sgblack@eecs.umich.edu print_error("Error creating microop object with mnemonic %s." % \ 1374591Sgblack@eecs.umich.edu statement.mnemonic) 1384483Sgblack@eecs.umich.edu raise 1394483Sgblack@eecs.umich.edu try: 1404483Sgblack@eecs.umich.edu for label in statement.labels: 1415009Sgblack@eecs.umich.edu container.labels[label.text] = microop 1425594Sgblack@eecs.umich.edu if label.is_extern: 1435009Sgblack@eecs.umich.edu container.externs[label.text] = microop 1445039Sgblack@eecs.umich.edu container.add_microop(statement.mnemonic, microop) 1454483Sgblack@eecs.umich.edu except: 1464483Sgblack@eecs.umich.edu print_error("Error adding microop.") 1474483Sgblack@eecs.umich.edu raise 1484483Sgblack@eecs.umich.edu elif statement.is_directive: 1494613Sgblack@eecs.umich.edu if statement.name not in container.directives.keys(): 1504613Sgblack@eecs.umich.edu raise Exception, "Unrecognized directive: %s" % statement.name 1514613Sgblack@eecs.umich.edu parser.symbols["__directiveFunctionFromInsideTheAssembler"] = \ 1524613Sgblack@eecs.umich.edu container.directives[statement.name] 1534483Sgblack@eecs.umich.edu try: 1544613Sgblack@eecs.umich.edu eval('__directiveFunctionFromInsideTheAssembler(%s)' % 1554613Sgblack@eecs.umich.edu statement.params, {}, parser.symbols) 1564483Sgblack@eecs.umich.edu except: 1574483Sgblack@eecs.umich.edu print_error("Error executing directive.") 15812563Sgabeblack@google.com print(container.directives) 1594483Sgblack@eecs.umich.edu raise 1604483Sgblack@eecs.umich.edu else: 1614483Sgblack@eecs.umich.edu raise Exception, "Didn't recognize the type of statement", statement 1624483Sgblack@eecs.umich.edu 1634483Sgblack@eecs.umich.edu########################################################################## 1644483Sgblack@eecs.umich.edu# 1654483Sgblack@eecs.umich.edu# Lexer specification 1664483Sgblack@eecs.umich.edu# 1674483Sgblack@eecs.umich.edu########################################################################## 1684483Sgblack@eecs.umich.edu 1694483Sgblack@eecs.umich.edu# Error handler. Just call exit. Output formatted to work under 1704483Sgblack@eecs.umich.edu# Emacs compile-mode. Optional 'print_traceback' arg, if set to True, 1714483Sgblack@eecs.umich.edu# prints a Python stack backtrace too (can be handy when trying to 1724483Sgblack@eecs.umich.edu# debug the parser itself). 1734483Sgblack@eecs.umich.edudef error(lineno, string, print_traceback = False): 1744483Sgblack@eecs.umich.edu # Print a Python stack backtrace if requested. 1754483Sgblack@eecs.umich.edu if (print_traceback): 1764483Sgblack@eecs.umich.edu traceback.print_exc() 1774483Sgblack@eecs.umich.edu if lineno != 0: 1784483Sgblack@eecs.umich.edu line_str = "%d:" % lineno 1794483Sgblack@eecs.umich.edu else: 1804483Sgblack@eecs.umich.edu line_str = "" 1814483Sgblack@eecs.umich.edu sys.exit("%s %s" % (line_str, string)) 1824483Sgblack@eecs.umich.edu 1834483Sgblack@eecs.umich.edureserved = ('DEF', 'MACROOP', 'ROM', 'EXTERN') 1844483Sgblack@eecs.umich.edu 1854483Sgblack@eecs.umich.edutokens = reserved + ( 1864483Sgblack@eecs.umich.edu # identifier 1874483Sgblack@eecs.umich.edu 'ID', 1884483Sgblack@eecs.umich.edu # arguments for microops and directives 1894483Sgblack@eecs.umich.edu 'PARAMS', 1904483Sgblack@eecs.umich.edu 1914483Sgblack@eecs.umich.edu 'LPAREN', 'RPAREN', 1924483Sgblack@eecs.umich.edu 'LBRACE', 'RBRACE', 1934483Sgblack@eecs.umich.edu 'COLON', 'SEMI', 'DOT', 1944483Sgblack@eecs.umich.edu 'NEWLINE' 1954483Sgblack@eecs.umich.edu ) 1964483Sgblack@eecs.umich.edu 1974483Sgblack@eecs.umich.edu# New lines are ignored at the top level, but they end statements in the 1984483Sgblack@eecs.umich.edu# assembler 1994483Sgblack@eecs.umich.edustates = ( 2004483Sgblack@eecs.umich.edu ('asm', 'exclusive'), 2014483Sgblack@eecs.umich.edu ('params', 'exclusive'), 2024483Sgblack@eecs.umich.edu) 2034483Sgblack@eecs.umich.edu 2044483Sgblack@eecs.umich.edureserved_map = { } 2054483Sgblack@eecs.umich.edufor r in reserved: 2064483Sgblack@eecs.umich.edu reserved_map[r.lower()] = r 2074483Sgblack@eecs.umich.edu 2084512Sgblack@eecs.umich.edu# Ignore comments 2094502Sgblack@eecs.umich.edudef t_ANY_COMMENT(t): 2104502Sgblack@eecs.umich.edu r'\#[^\n]*(?=\n)' 2114502Sgblack@eecs.umich.edu 2124502Sgblack@eecs.umich.edudef t_ANY_MULTILINECOMMENT(t): 2134502Sgblack@eecs.umich.edu r'/\*([^/]|((?<!\*)/))*\*/' 2144502Sgblack@eecs.umich.edu 2154512Sgblack@eecs.umich.edu# A colon marks the end of a label. It should follow an ID which will 2164512Sgblack@eecs.umich.edu# put the lexer in the "params" state. Seeing the colon will put it back 2174512Sgblack@eecs.umich.edu# in the "asm" state since it knows it saw a label and not a mnemonic. 2184483Sgblack@eecs.umich.edudef t_params_COLON(t): 2194483Sgblack@eecs.umich.edu r':' 2204483Sgblack@eecs.umich.edu t.lexer.begin('asm') 2214483Sgblack@eecs.umich.edu return t 2224483Sgblack@eecs.umich.edu 2234512Sgblack@eecs.umich.edu# Parameters are a string of text which don't contain an unescaped statement 2244512Sgblack@eecs.umich.edu# statement terminator, ie a newline or semi colon. 2254483Sgblack@eecs.umich.edudef t_params_PARAMS(t): 2264566Sgblack@eecs.umich.edu r'([^\n;\\]|(\\[\n;\\]))+' 2274483Sgblack@eecs.umich.edu t.lineno += t.value.count('\n') 2284566Sgblack@eecs.umich.edu unescapeParamsRE = re.compile(r'(\\[\n;\\])') 2294566Sgblack@eecs.umich.edu def unescapeParams(mo): 2304566Sgblack@eecs.umich.edu val = mo.group(0) 2314566Sgblack@eecs.umich.edu return val[1] 2324566Sgblack@eecs.umich.edu t.value = unescapeParamsRE.sub(unescapeParams, t.value) 2334483Sgblack@eecs.umich.edu t.lexer.begin('asm') 2344483Sgblack@eecs.umich.edu return t 2354483Sgblack@eecs.umich.edu 2364613Sgblack@eecs.umich.edu# An "ID" in the micro assembler is either a label, directive, or mnemonic 2374613Sgblack@eecs.umich.edu# If it's either a directive or a mnemonic, it will be optionally followed by 2384613Sgblack@eecs.umich.edu# parameters. If it's a label, the following colon will make the lexer stop 2394613Sgblack@eecs.umich.edu# looking for parameters. 2404613Sgblack@eecs.umich.edudef t_asm_ID(t): 2414613Sgblack@eecs.umich.edu r'[A-Za-z_]\w*' 2424613Sgblack@eecs.umich.edu t.type = reserved_map.get(t.value, 'ID') 2435593Sgblack@eecs.umich.edu # If the ID is really "extern", we shouldn't start looking for parameters 2445593Sgblack@eecs.umich.edu # yet. The real ID, the label itself, is coming up. 2455593Sgblack@eecs.umich.edu if t.type != 'EXTERN': 2465593Sgblack@eecs.umich.edu t.lexer.begin('params') 2474613Sgblack@eecs.umich.edu return t 2484613Sgblack@eecs.umich.edu 2494613Sgblack@eecs.umich.edu# If there is a label and you're -not- in the assembler (which would be caught 2504613Sgblack@eecs.umich.edu# above), don't start looking for parameters. 2514613Sgblack@eecs.umich.edudef t_ANY_ID(t): 2524613Sgblack@eecs.umich.edu r'[A-Za-z_]\w*' 2534613Sgblack@eecs.umich.edu t.type = reserved_map.get(t.value, 'ID') 2544613Sgblack@eecs.umich.edu return t 2554613Sgblack@eecs.umich.edu 2564512Sgblack@eecs.umich.edu# Braces enter and exit micro assembly 2574483Sgblack@eecs.umich.edudef t_INITIAL_LBRACE(t): 2584483Sgblack@eecs.umich.edu r'\{' 2594483Sgblack@eecs.umich.edu t.lexer.begin('asm') 2604483Sgblack@eecs.umich.edu return t 2614483Sgblack@eecs.umich.edu 2624483Sgblack@eecs.umich.edudef t_asm_RBRACE(t): 2634483Sgblack@eecs.umich.edu r'\}' 2644483Sgblack@eecs.umich.edu t.lexer.begin('INITIAL') 2654483Sgblack@eecs.umich.edu return t 2664483Sgblack@eecs.umich.edu 2674512Sgblack@eecs.umich.edu# At the top level, keep track of newlines only for line counting. 2684483Sgblack@eecs.umich.edudef t_INITIAL_NEWLINE(t): 2694483Sgblack@eecs.umich.edu r'\n+' 2704483Sgblack@eecs.umich.edu t.lineno += t.value.count('\n') 2714483Sgblack@eecs.umich.edu 2724512Sgblack@eecs.umich.edu# In the micro assembler, do line counting but also return a token. The 2734512Sgblack@eecs.umich.edu# token is needed by the parser to detect the end of a statement. 2744483Sgblack@eecs.umich.edudef t_asm_NEWLINE(t): 2754483Sgblack@eecs.umich.edu r'\n+' 2764483Sgblack@eecs.umich.edu t.lineno += t.value.count('\n') 2774483Sgblack@eecs.umich.edu return t 2784483Sgblack@eecs.umich.edu 2794512Sgblack@eecs.umich.edu# A newline or semi colon when looking for params signals that the statement 2804512Sgblack@eecs.umich.edu# is over and the lexer should go back to looking for regular assembly. 2814483Sgblack@eecs.umich.edudef t_params_NEWLINE(t): 2824483Sgblack@eecs.umich.edu r'\n+' 2834483Sgblack@eecs.umich.edu t.lineno += t.value.count('\n') 2844483Sgblack@eecs.umich.edu t.lexer.begin('asm') 2854483Sgblack@eecs.umich.edu return t 2864483Sgblack@eecs.umich.edu 2874483Sgblack@eecs.umich.edudef t_params_SEMI(t): 2884483Sgblack@eecs.umich.edu r';' 2894483Sgblack@eecs.umich.edu t.lexer.begin('asm') 2904483Sgblack@eecs.umich.edu return t 2914483Sgblack@eecs.umich.edu 2924483Sgblack@eecs.umich.edu# Basic regular expressions to pick out simple tokens 2934483Sgblack@eecs.umich.edut_ANY_LPAREN = r'\(' 2944483Sgblack@eecs.umich.edut_ANY_RPAREN = r'\)' 2954483Sgblack@eecs.umich.edut_ANY_SEMI = r';' 2964483Sgblack@eecs.umich.edut_ANY_DOT = r'\.' 2974483Sgblack@eecs.umich.edu 2984483Sgblack@eecs.umich.edut_ANY_ignore = ' \t\x0c' 2994483Sgblack@eecs.umich.edu 3004483Sgblack@eecs.umich.edudef t_ANY_error(t): 3014483Sgblack@eecs.umich.edu error(t.lineno, "illegal character '%s'" % t.value[0]) 3024483Sgblack@eecs.umich.edu t.skip(1) 3034483Sgblack@eecs.umich.edu 3044483Sgblack@eecs.umich.edu########################################################################## 3054483Sgblack@eecs.umich.edu# 3064483Sgblack@eecs.umich.edu# Parser specification 3074483Sgblack@eecs.umich.edu# 3084483Sgblack@eecs.umich.edu########################################################################## 3094483Sgblack@eecs.umich.edu 3104483Sgblack@eecs.umich.edu# Start symbol for a file which may have more than one macroop or rom 3114483Sgblack@eecs.umich.edu# specification. 3124483Sgblack@eecs.umich.edudef p_file(t): 3134483Sgblack@eecs.umich.edu 'file : opt_rom_or_macros' 3144483Sgblack@eecs.umich.edu 3154483Sgblack@eecs.umich.edudef p_opt_rom_or_macros_0(t): 3164483Sgblack@eecs.umich.edu 'opt_rom_or_macros : ' 3174483Sgblack@eecs.umich.edu 3184483Sgblack@eecs.umich.edudef p_opt_rom_or_macros_1(t): 3194483Sgblack@eecs.umich.edu 'opt_rom_or_macros : rom_or_macros' 3204483Sgblack@eecs.umich.edu 3214483Sgblack@eecs.umich.edudef p_rom_or_macros_0(t): 3224483Sgblack@eecs.umich.edu 'rom_or_macros : rom_or_macro' 3234483Sgblack@eecs.umich.edu 3244483Sgblack@eecs.umich.edudef p_rom_or_macros_1(t): 3254483Sgblack@eecs.umich.edu 'rom_or_macros : rom_or_macros rom_or_macro' 3264483Sgblack@eecs.umich.edu 3274483Sgblack@eecs.umich.edudef p_rom_or_macro_0(t): 3284512Sgblack@eecs.umich.edu '''rom_or_macro : rom_block 3294512Sgblack@eecs.umich.edu | macroop_def''' 3304483Sgblack@eecs.umich.edu 3314483Sgblack@eecs.umich.edu# Defines a section of microcode that should go in the current ROM 3324483Sgblack@eecs.umich.edudef p_rom_block(t): 3334483Sgblack@eecs.umich.edu 'rom_block : DEF ROM block SEMI' 3344507Sgblack@eecs.umich.edu if not t.parser.rom: 3354507Sgblack@eecs.umich.edu print_error("Rom block found, but no Rom object specified.") 3364507Sgblack@eecs.umich.edu raise TypeError, "Rom block found, but no Rom object was specified." 3374483Sgblack@eecs.umich.edu for statement in t[3].statements: 3384483Sgblack@eecs.umich.edu handle_statement(t.parser, t.parser.rom, statement) 3394483Sgblack@eecs.umich.edu t[0] = t.parser.rom 3404483Sgblack@eecs.umich.edu 3414483Sgblack@eecs.umich.edu# Defines a macroop that jumps to an external label in the ROM 3424483Sgblack@eecs.umich.edudef p_macroop_def_0(t): 3434502Sgblack@eecs.umich.edu 'macroop_def : DEF MACROOP ID LPAREN ID RPAREN SEMI' 3444507Sgblack@eecs.umich.edu if not t.parser.rom_macroop_type: 3454507Sgblack@eecs.umich.edu print_error("ROM based macroop found, but no ROM macroop class was specified.") 3464507Sgblack@eecs.umich.edu raise TypeError, "ROM based macroop found, but no ROM macroop class was specified." 3474507Sgblack@eecs.umich.edu macroop = t.parser.rom_macroop_type(t[3], t[5]) 3484508Sgblack@eecs.umich.edu t.parser.macroops[t[3]] = macroop 3494507Sgblack@eecs.umich.edu 3504483Sgblack@eecs.umich.edu 3514483Sgblack@eecs.umich.edu# Defines a macroop that is combinationally generated 3524483Sgblack@eecs.umich.edudef p_macroop_def_1(t): 3534483Sgblack@eecs.umich.edu 'macroop_def : DEF MACROOP ID block SEMI' 3544483Sgblack@eecs.umich.edu try: 3554483Sgblack@eecs.umich.edu curop = t.parser.macro_type(t[3]) 3564483Sgblack@eecs.umich.edu except TypeError: 3574483Sgblack@eecs.umich.edu print_error("Error creating macroop object.") 3584483Sgblack@eecs.umich.edu raise 3594483Sgblack@eecs.umich.edu for statement in t[4].statements: 3604483Sgblack@eecs.umich.edu handle_statement(t.parser, curop, statement) 3614502Sgblack@eecs.umich.edu t.parser.macroops[t[3]] = curop 3624483Sgblack@eecs.umich.edu 3634512Sgblack@eecs.umich.edu# A block of statements 3644512Sgblack@eecs.umich.edudef p_block(t): 3654512Sgblack@eecs.umich.edu 'block : LBRACE statements RBRACE' 3664512Sgblack@eecs.umich.edu block = Block() 3674512Sgblack@eecs.umich.edu block.statements = t[2] 3684512Sgblack@eecs.umich.edu t[0] = block 3694512Sgblack@eecs.umich.edu 3704483Sgblack@eecs.umich.edudef p_statements_0(t): 3714483Sgblack@eecs.umich.edu 'statements : statement' 3724483Sgblack@eecs.umich.edu if t[1]: 3734483Sgblack@eecs.umich.edu t[0] = [t[1]] 3744483Sgblack@eecs.umich.edu else: 3754483Sgblack@eecs.umich.edu t[0] = [] 3764483Sgblack@eecs.umich.edu 3774483Sgblack@eecs.umich.edudef p_statements_1(t): 3784483Sgblack@eecs.umich.edu 'statements : statements statement' 3794483Sgblack@eecs.umich.edu if t[2]: 3804483Sgblack@eecs.umich.edu t[1].append(t[2]) 3814483Sgblack@eecs.umich.edu t[0] = t[1] 3824483Sgblack@eecs.umich.edu 3834483Sgblack@eecs.umich.edudef p_statement(t): 3844483Sgblack@eecs.umich.edu 'statement : content_of_statement end_of_statement' 3854483Sgblack@eecs.umich.edu t[0] = t[1] 3864483Sgblack@eecs.umich.edu 3874483Sgblack@eecs.umich.edu# A statement can be a microop or an assembler directive 3884483Sgblack@eecs.umich.edudef p_content_of_statement_0(t): 3894483Sgblack@eecs.umich.edu '''content_of_statement : microop 3904483Sgblack@eecs.umich.edu | directive''' 3914483Sgblack@eecs.umich.edu t[0] = t[1] 3924483Sgblack@eecs.umich.edu 3934512Sgblack@eecs.umich.edu# Ignore empty statements 3944483Sgblack@eecs.umich.edudef p_content_of_statement_1(t): 3954483Sgblack@eecs.umich.edu 'content_of_statement : ' 3964483Sgblack@eecs.umich.edu pass 3974483Sgblack@eecs.umich.edu 3984483Sgblack@eecs.umich.edu# Statements are ended by newlines or a semi colon 3994483Sgblack@eecs.umich.edudef p_end_of_statement(t): 4004483Sgblack@eecs.umich.edu '''end_of_statement : NEWLINE 4014483Sgblack@eecs.umich.edu | SEMI''' 4024483Sgblack@eecs.umich.edu pass 4034483Sgblack@eecs.umich.edu 4044512Sgblack@eecs.umich.edu# Different flavors of microop to avoid shift/reduce errors 4054483Sgblack@eecs.umich.edudef p_microop_0(t): 4064483Sgblack@eecs.umich.edu 'microop : labels ID' 4074483Sgblack@eecs.umich.edu microop = Microop() 4084483Sgblack@eecs.umich.edu microop.labels = t[1] 4094483Sgblack@eecs.umich.edu microop.mnemonic = t[2] 4104483Sgblack@eecs.umich.edu t[0] = microop 4114483Sgblack@eecs.umich.edu 4124483Sgblack@eecs.umich.edudef p_microop_1(t): 4134483Sgblack@eecs.umich.edu 'microop : ID' 4144483Sgblack@eecs.umich.edu microop = Microop() 4154483Sgblack@eecs.umich.edu microop.mnemonic = t[1] 4164483Sgblack@eecs.umich.edu t[0] = microop 4174483Sgblack@eecs.umich.edu 4184483Sgblack@eecs.umich.edudef p_microop_2(t): 4194483Sgblack@eecs.umich.edu 'microop : labels ID PARAMS' 4204483Sgblack@eecs.umich.edu microop = Microop() 4214483Sgblack@eecs.umich.edu microop.labels = t[1] 4224483Sgblack@eecs.umich.edu microop.mnemonic = t[2] 4234483Sgblack@eecs.umich.edu microop.params = t[3] 4244483Sgblack@eecs.umich.edu t[0] = microop 4254483Sgblack@eecs.umich.edu 4264483Sgblack@eecs.umich.edudef p_microop_3(t): 4274483Sgblack@eecs.umich.edu 'microop : ID PARAMS' 4284483Sgblack@eecs.umich.edu microop = Microop() 4294483Sgblack@eecs.umich.edu microop.mnemonic = t[1] 4304483Sgblack@eecs.umich.edu microop.params = t[2] 4314483Sgblack@eecs.umich.edu t[0] = microop 4324483Sgblack@eecs.umich.edu 4334512Sgblack@eecs.umich.edu# Labels in the microcode 4344483Sgblack@eecs.umich.edudef p_labels_0(t): 4354483Sgblack@eecs.umich.edu 'labels : label' 4364483Sgblack@eecs.umich.edu t[0] = [t[1]] 4374483Sgblack@eecs.umich.edu 4384483Sgblack@eecs.umich.edudef p_labels_1(t): 4394483Sgblack@eecs.umich.edu 'labels : labels label' 4404483Sgblack@eecs.umich.edu t[1].append(t[2]) 4414483Sgblack@eecs.umich.edu t[0] = t[1] 4424483Sgblack@eecs.umich.edu 4435009Sgblack@eecs.umich.edu# labels on lines by themselves are attached to the following instruction. 4445009Sgblack@eecs.umich.edudef p_labels_2(t): 4455009Sgblack@eecs.umich.edu 'labels : labels NEWLINE' 4465009Sgblack@eecs.umich.edu t[0] = t[1] 4475009Sgblack@eecs.umich.edu 4484483Sgblack@eecs.umich.edudef p_label_0(t): 4494483Sgblack@eecs.umich.edu 'label : ID COLON' 4504483Sgblack@eecs.umich.edu label = Label() 4514483Sgblack@eecs.umich.edu label.is_extern = False 4524483Sgblack@eecs.umich.edu label.text = t[1] 4534483Sgblack@eecs.umich.edu t[0] = label 4544483Sgblack@eecs.umich.edu 4554483Sgblack@eecs.umich.edudef p_label_1(t): 4564483Sgblack@eecs.umich.edu 'label : EXTERN ID COLON' 4574483Sgblack@eecs.umich.edu label = Label() 4584483Sgblack@eecs.umich.edu label.is_extern = True 4594483Sgblack@eecs.umich.edu label.text = t[2] 4604483Sgblack@eecs.umich.edu t[0] = label 4614483Sgblack@eecs.umich.edu 4624512Sgblack@eecs.umich.edu# Directives for the macroop 4634503Sgblack@eecs.umich.edudef p_directive_0(t): 4644483Sgblack@eecs.umich.edu 'directive : DOT ID' 4654483Sgblack@eecs.umich.edu directive = Directive() 4664483Sgblack@eecs.umich.edu directive.name = t[2] 4674483Sgblack@eecs.umich.edu t[0] = directive 4684483Sgblack@eecs.umich.edu 4694503Sgblack@eecs.umich.edudef p_directive_1(t): 4704503Sgblack@eecs.umich.edu 'directive : DOT ID PARAMS' 4714503Sgblack@eecs.umich.edu directive = Directive() 4724503Sgblack@eecs.umich.edu directive.name = t[2] 4734503Sgblack@eecs.umich.edu directive.params = t[3] 4744503Sgblack@eecs.umich.edu t[0] = directive 4754503Sgblack@eecs.umich.edu 4764483Sgblack@eecs.umich.edu# Parse error handler. Note that the argument here is the offending 4774483Sgblack@eecs.umich.edu# *token*, not a grammar symbol (hence the need to use t.value) 4784483Sgblack@eecs.umich.edudef p_error(t): 4794483Sgblack@eecs.umich.edu if t: 4804483Sgblack@eecs.umich.edu error(t.lineno, "syntax error at '%s'" % t.value) 4814483Sgblack@eecs.umich.edu else: 4824483Sgblack@eecs.umich.edu error(0, "unknown syntax error", True) 4834483Sgblack@eecs.umich.edu 4844483Sgblack@eecs.umich.educlass MicroAssembler(object): 4854483Sgblack@eecs.umich.edu 4864507Sgblack@eecs.umich.edu def __init__(self, macro_type, microops, 4874507Sgblack@eecs.umich.edu rom = None, rom_macroop_type = None): 4884483Sgblack@eecs.umich.edu self.lexer = lex.lex() 4894483Sgblack@eecs.umich.edu self.parser = yacc.yacc() 4904483Sgblack@eecs.umich.edu self.parser.macro_type = macro_type 4914502Sgblack@eecs.umich.edu self.parser.macroops = {} 4924483Sgblack@eecs.umich.edu self.parser.microops = microops 4934483Sgblack@eecs.umich.edu self.parser.rom = rom 4944507Sgblack@eecs.umich.edu self.parser.rom_macroop_type = rom_macroop_type 4954613Sgblack@eecs.umich.edu self.parser.symbols = {} 4964613Sgblack@eecs.umich.edu self.symbols = self.parser.symbols 4974483Sgblack@eecs.umich.edu 4984483Sgblack@eecs.umich.edu def assemble(self, asm): 4994483Sgblack@eecs.umich.edu self.parser.parse(asm, lexer=self.lexer) 5004483Sgblack@eecs.umich.edu macroops = self.parser.macroops 5014502Sgblack@eecs.umich.edu self.parser.macroops = {} 5024483Sgblack@eecs.umich.edu return macroops 503