Initial commit
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Jeff Epler
commit
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1
.gitignore
vendored
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1
.gitignore
vendored
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@ -0,0 +1 @@
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*.pyc
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100
README
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100
README
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@ -0,0 +1,100 @@
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ptasm (1)
|
||||
=========
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NAME
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||||
----
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ptasm - Table driven assembler
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|
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SYNOPSIS
|
||||
--------
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[verse]
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'ptasm' [-t table.py] [file|'-']
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|
||||
DESCRIPTION
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||||
-----------
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ptasm is a table-driven assembler written primarily to assemble code
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for simple embedded cores like Peter Wallace's "DumbAss8" family.
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||||
However, the passive voice hopes it is suitable to target other CPU
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||||
architectures.
|
||||
|
||||
OPTIONS
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-------
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-t::
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Specify the instruction set table, which is a Python file that
|
||||
calls Insn() repeatedly to specify each instruction format. The
|
||||
default is +d8_tab.py+.
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|
||||
COPYRIGHT
|
||||
---------
|
||||
While some files may offer a more permissive license, the project
|
||||
as a whole is under the following disjunctive dual license giving you the
|
||||
choice of one of the two following sets of free software/open source licensing
|
||||
terms:
|
||||
|
||||
* GNU General Public License (GPL), version 2.0 or later
|
||||
* 3-clause BSD License
|
||||
|
||||
|
||||
The GNU GPL License
|
||||
~~~~~~~~~~~~~~~~~~~
|
||||
|
||||
This program is free software; you can redistribute it and/or modify
|
||||
it under the terms of the GNU General Public License as published by
|
||||
the Free Software Foundation; either version 2 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
This program is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
along with this program; if not, write to the Free Software
|
||||
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
|
||||
|
||||
The 3-clause BSD License
|
||||
~~~~~~~~~~~~~~~~~~~~~~~~
|
||||
|
||||
Redistribution and use in source and binary forms, with or without
|
||||
modification, are permitted provided that the following conditions
|
||||
are met:
|
||||
|
||||
* Redistributions of source code must retain the above copyright
|
||||
notice, this list of conditions and the following disclaimer.
|
||||
|
||||
* Redistributions in binary form must reproduce the above
|
||||
copyright notice, this list of conditions and the following
|
||||
disclaimer in the documentation and/or other materials
|
||||
provided with the distribution.
|
||||
|
||||
* Neither the name of Mesa Electronics nor the names of its
|
||||
contributors may be used to endorse or promote products
|
||||
derived from this software without specific prior written
|
||||
permission.
|
||||
|
||||
Disclaimer:
|
||||
|
||||
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||||
COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||||
BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
||||
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
||||
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
||||
ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
POSSIBILITY OF SUCH DAMAGE.
|
||||
|
||||
|
||||
|
||||
Copyright of this README file
|
||||
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
||||
|
||||
Copying and distribution of this file, with or without modification,
|
||||
are permitted in any medium without royalty provided the copyright
|
||||
notice and this notice are preserved. This file is offered as-is,
|
||||
without any warranty.
|
||||
22
d8.a
Normal file
22
d8.a
Normal file
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|
@ -0,0 +1,22 @@
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|||
; A trivial file exercising the d8 assembler subset implemented so far
|
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|
||||
; Copying and distribution of this file, with or without modification,
|
||||
; are permitted in any medium without royalty provided the copyright
|
||||
; notice and this notice are preserved. This file is offered as-is,
|
||||
; without any warranty.
|
||||
nop
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||||
nop
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nop
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|
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start:
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ldib 0x0
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stab ledloc
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ldib 0xff
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stab ledloc
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||||
jmp start
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ledloc = 0x123
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ldab @x
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ldab @x, 0
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||||
ldab @x, 19
|
||||
17
d8_tab.py
Normal file
17
d8_tab.py
Normal file
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|
@ -0,0 +1,17 @@
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|||
# -*- python -*-
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# (subset) table for "DumbAss8" embedded computing core
|
||||
#
|
||||
# Copying and distribution of this file, with or without modification,
|
||||
# are permitted in any medium without royalty provided the copyright
|
||||
# notice and this notice are preserved. This file is offered as-is,
|
||||
# without any warranty.
|
||||
|
||||
from pta.BasicWordInstruction import *
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Insn('ldib *', I8, 0x01)
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Insn('stab *', I10, 0xB1)
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Insn('jmp *', I11, 0x10)
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Insn('nop', I0, 0x00)
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Insn('ldab @x', I0, 0x74)
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Insn('ldab @x,*', I7, 0x74)
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||||
95
pta/BasicWordInstruction.py
Normal file
95
pta/BasicWordInstruction.py
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@ -0,0 +1,95 @@
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# -*- python coding: utf-8 -*-
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#
|
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# Copyright © 2014 Jeff Epler http://emergent.unpythonic.net
|
||||
#
|
||||
# This program is is licensed under a disjunctive dual license giving you
|
||||
# the choice of one of the two following sets of free software/open source
|
||||
# licensing terms:
|
||||
#
|
||||
# * GNU General Public License (GPL), version 2.0 or later
|
||||
# * 3-clause BSD License
|
||||
#
|
||||
#
|
||||
# The GNU GPL License:
|
||||
#
|
||||
# This program is free software; you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation; either version 2 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# This program is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with this program; if not, write to the Free Software
|
||||
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
#
|
||||
#
|
||||
# The 3-clause BSD License:
|
||||
#
|
||||
# Redistribution and use in source and binary forms, with or without
|
||||
# modification, are permitted provided that the following conditions
|
||||
# are met:
|
||||
#
|
||||
# * Redistributions of source code must retain the above copyright
|
||||
# notice, this list of conditions and the following disclaimer.
|
||||
#
|
||||
# * Redistributions in binary form must reproduce the above
|
||||
# copyright notice, this list of conditions and the following
|
||||
# disclaimer in the documentation and/or other materials
|
||||
# provided with the distribution.
|
||||
#
|
||||
# * Neither the name of Mesa Electronics nor the names of its
|
||||
# contributors may be used to endorse or promote products
|
||||
# derived from this software without specific prior written
|
||||
# permission.
|
||||
#
|
||||
#
|
||||
# Disclaimer:
|
||||
#
|
||||
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||||
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||||
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
||||
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
||||
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
||||
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
# POSSIBILITY OF SUCH DAMAGE.
|
||||
|
||||
def nbits(b, v):
|
||||
if v >= (1<<b) or (b > 1 and v <= -(1<<(b-1))):
|
||||
raise ValueError, "%d (0x%x) doesn't fit in %d bits" % (v, v, b)
|
||||
return v & ((1<<b) - 1)
|
||||
_8 = lambda v: nbits(8)
|
||||
|
||||
def unbits(b, v):
|
||||
if v >= (1<<b) or v < 0:
|
||||
raise ValueError, "%d (0x%x) doesn't fit in %d bits" % (v, v, b)
|
||||
return v
|
||||
|
||||
class BasicInstruction:
|
||||
def __init__(self, hi8, _, arg=0):
|
||||
self.hi8 = hi8
|
||||
self.arg = arg
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||||
|
||||
@property
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||||
def length(self): return 1
|
||||
|
||||
def assemble(self, assembler):
|
||||
v = assembler.symval(self.arg)
|
||||
return [(self.hi8 << 8) | nbits(self.argwidth, v)]
|
||||
|
||||
class I0(BasicInstruction): argwidth=0
|
||||
class I7(BasicInstruction): argwidth=7
|
||||
class I8(BasicInstruction): argwidth=8
|
||||
class I10(BasicInstruction): argwidth=10
|
||||
class I11(BasicInstruction): argwidth=11
|
||||
class I16(BasicInstruction): argwidth=16
|
||||
|
||||
|
||||
65
pta/__init__.py
Normal file
65
pta/__init__.py
Normal file
|
|
@ -0,0 +1,65 @@
|
|||
# -*- python coding: utf-8 -*-
|
||||
#
|
||||
# Copyright © 2014 Jeff Epler http://emergent.unpythonic.net
|
||||
#
|
||||
# This program is is licensed under a disjunctive dual license giving you
|
||||
# the choice of one of the two following sets of free software/open source
|
||||
# licensing terms:
|
||||
#
|
||||
# * GNU General Public License (GPL), version 2.0 or later
|
||||
# * 3-clause BSD License
|
||||
#
|
||||
#
|
||||
# The GNU GPL License:
|
||||
#
|
||||
# This program is free software; you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation; either version 2 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# This program is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with this program; if not, write to the Free Software
|
||||
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
#
|
||||
#
|
||||
# The 3-clause BSD License:
|
||||
#
|
||||
# Redistribution and use in source and binary forms, with or without
|
||||
# modification, are permitted provided that the following conditions
|
||||
# are met:
|
||||
#
|
||||
# * Redistributions of source code must retain the above copyright
|
||||
# notice, this list of conditions and the following disclaimer.
|
||||
#
|
||||
# * Redistributions in binary form must reproduce the above
|
||||
# copyright notice, this list of conditions and the following
|
||||
# disclaimer in the documentation and/or other materials
|
||||
# provided with the distribution.
|
||||
#
|
||||
# * Neither the name of Mesa Electronics nor the names of its
|
||||
# contributors may be used to endorse or promote products
|
||||
# derived from this software without specific prior written
|
||||
# permission.
|
||||
#
|
||||
#
|
||||
# Disclaimer:
|
||||
#
|
||||
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||||
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||||
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
||||
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
||||
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
||||
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
# POSSIBILITY OF SUCH DAMAGE.
|
||||
|
||||
__all__ = ['grammar']
|
||||
108
pta/grammar.py
Normal file
108
pta/grammar.py
Normal file
|
|
@ -0,0 +1,108 @@
|
|||
# -*- python coding: utf-8 -*-
|
||||
#
|
||||
# Copyright © 2014 Jeff Epler http://emergent.unpythonic.net
|
||||
#
|
||||
# This program is is licensed under a disjunctive dual license giving you
|
||||
# the choice of one of the two following sets of free software/open source
|
||||
# licensing terms:
|
||||
#
|
||||
# * GNU General Public License (GPL), version 2.0 or later
|
||||
# * 3-clause BSD License
|
||||
#
|
||||
#
|
||||
# The GNU GPL License:
|
||||
#
|
||||
# This program is free software; you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation; either version 2 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# This program is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with this program; if not, write to the Free Software
|
||||
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
#
|
||||
#
|
||||
# The 3-clause BSD License:
|
||||
#
|
||||
# Redistribution and use in source and binary forms, with or without
|
||||
# modification, are permitted provided that the following conditions
|
||||
# are met:
|
||||
#
|
||||
# * Redistributions of source code must retain the above copyright
|
||||
# notice, this list of conditions and the following disclaimer.
|
||||
#
|
||||
# * Redistributions in binary form must reproduce the above
|
||||
# copyright notice, this list of conditions and the following
|
||||
# disclaimer in the documentation and/or other materials
|
||||
# provided with the distribution.
|
||||
#
|
||||
# * Neither the name of Mesa Electronics nor the names of its
|
||||
# contributors may be used to endorse or promote products
|
||||
# derived from this software without specific prior written
|
||||
# permission.
|
||||
#
|
||||
#
|
||||
# Disclaimer:
|
||||
#
|
||||
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||||
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||||
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
||||
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
||||
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
||||
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
# POSSIBILITY OF SUCH DAMAGE.
|
||||
|
||||
from pyparsing import *
|
||||
|
||||
if not hasattr(Forward, "__ilshift__"):
|
||||
Forward.__ilshift__ = Forward.__lshift__
|
||||
PLUS = (None, 1)
|
||||
STAR = (None, None)
|
||||
|
||||
Identifier = Word( srange("[a-zA-Z_]"), srange("[a-zA-Z0-9_]") )
|
||||
Number = Regex(r"[-+]?(?:0x[0-9a-fA-F]*|0[0-7]*|[1-9][0-9]*|0)")
|
||||
Label = (Identifier + ":").setParseAction(lambda s, loc, toks: toks[0]
|
||||
).setResultsName("label")
|
||||
|
||||
Expression = Forward().setName("expression")
|
||||
Value = Identifier | Number | ('(' + Expression + ')')
|
||||
Product = Value + (Word('*/', max=1) + Value) * STAR
|
||||
Sum = Product + (Word('-+', max=1) + Product) * STAR
|
||||
PyExpression = QuotedString("`", escChar="\\", unquoteResults=True)
|
||||
Expression <<= Sum | PyExpression
|
||||
|
||||
PyCode = QuotedString("```", escChar="\\", unquoteResults=True
|
||||
).setResultsName("pycode")
|
||||
Assignment = (Identifier.setResultsName("id") + "=" + Combine(Expression).setResultsName("expr")
|
||||
).setResultsName("assignment")
|
||||
|
||||
OpaquePart = Regex('[a-zA-Z0-9_]+|[^\s*,]')
|
||||
Instruction = Identifier + (OpaquePart | "," | "*")*STAR
|
||||
|
||||
def InstructionPatternToParseElement(s, f):
|
||||
p = Instruction.parseString(s, True)
|
||||
indices = [0]
|
||||
parts = []
|
||||
for i, si in enumerate(p):
|
||||
if si == "*":
|
||||
indices.append(i)
|
||||
parts.append(Combine(Expression))
|
||||
else:
|
||||
parts.append(Literal(si))
|
||||
|
||||
def extractparts(s, l, toks):
|
||||
return f(*(toks[i] for i in indices))
|
||||
rule = And(parts)
|
||||
# setParseAction's wrapper balls us up real bad
|
||||
rule.parseAction = [extractparts]
|
||||
return rule
|
||||
189
ptasm.py
Normal file
189
ptasm.py
Normal file
|
|
@ -0,0 +1,189 @@
|
|||
#!/usr/bin/python
|
||||
# -*- coding: utf-8 -*-
|
||||
|
||||
# Copyright © 2014 Jeff Epler http://emergent.unpythonic.net
|
||||
#
|
||||
# This program is is licensed under a disjunctive dual license giving you
|
||||
# the choice of one of the two following sets of free software/open source
|
||||
# licensing terms:
|
||||
#
|
||||
# * GNU General Public License (GPL), version 2.0 or later
|
||||
# * 3-clause BSD License
|
||||
#
|
||||
#
|
||||
# The GNU GPL License:
|
||||
#
|
||||
# This program is free software; you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation; either version 2 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# This program is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with this program; if not, write to the Free Software
|
||||
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
#
|
||||
#
|
||||
# The 3-clause BSD License:
|
||||
#
|
||||
# Redistribution and use in source and binary forms, with or without
|
||||
# modification, are permitted provided that the following conditions
|
||||
# are met:
|
||||
#
|
||||
# * Redistributions of source code must retain the above copyright
|
||||
# notice, this list of conditions and the following disclaimer.
|
||||
#
|
||||
# * Redistributions in binary form must reproduce the above
|
||||
# copyright notice, this list of conditions and the following
|
||||
# disclaimer in the documentation and/or other materials
|
||||
# provided with the distribution.
|
||||
#
|
||||
# * Neither the name of Mesa Electronics nor the names of its
|
||||
# contributors may be used to endorse or promote products
|
||||
# derived from this software without specific prior written
|
||||
# permission.
|
||||
#
|
||||
#
|
||||
# Disclaimer:
|
||||
#
|
||||
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||||
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||||
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
||||
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
||||
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
||||
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
# POSSIBILITY OF SUCH DAMAGE.
|
||||
import getopt
|
||||
import os
|
||||
import sys
|
||||
from pta.grammar import *
|
||||
|
||||
Instruction = Forward()
|
||||
|
||||
Org = (Literal(".org") + Combine(Expression)).setResultsName("origin")
|
||||
|
||||
Grammar = (
|
||||
Assignment
|
||||
#| (PyCode).setResultsName("pycode")
|
||||
| (Optional(Label) + Instruction.setResultsName("instruction"))
|
||||
| Label
|
||||
| Org) * (None, 1)
|
||||
|
||||
def strip(line):
|
||||
return line.strip().split(";", 1)[0]
|
||||
|
||||
class Assembler:
|
||||
def __init__(self):
|
||||
self.InstructionSet = {}
|
||||
|
||||
def run(self, program, filename):
|
||||
self.rom = {}
|
||||
self.symbols = {}
|
||||
|
||||
self.input(program, filename)
|
||||
self.pass1()
|
||||
self.pass2()
|
||||
|
||||
def input(self, program, filename):
|
||||
self.filename = filename
|
||||
program = ((i+1, strip(line))
|
||||
for i, line in enumerate(program.split("\n")))
|
||||
self.program = [(i, Grammar.parseString(line, True))
|
||||
for i, line in program if line]
|
||||
|
||||
def symval(self, expr):
|
||||
if not expr: return 0
|
||||
return eval(expr, self.symbols)
|
||||
|
||||
def error(self, lno, err):
|
||||
print "%s:%d: %s" % (self.filename, lno, err)
|
||||
raise SystemExit
|
||||
|
||||
def pass1(self):
|
||||
self.symbols['__passno__'] = 1
|
||||
addr = 0
|
||||
lno = 0
|
||||
|
||||
for lno, line in self.program:
|
||||
self.symbols['__lno__'] = lno
|
||||
self.symbols['__addr__'] = addr
|
||||
if line.origin:
|
||||
addr = self.symval(line.origin[1])
|
||||
if line.label:
|
||||
self.symbols[line.label] = addr
|
||||
if line.instruction:
|
||||
instruction = line.instruction[0]
|
||||
addr += instruction.length
|
||||
if line.assignment:
|
||||
self.symbols[line.id] = self.symval(line.expr)
|
||||
|
||||
def pass2(self):
|
||||
self.symbols['__passno__'] = 2
|
||||
addr = 0
|
||||
|
||||
for lno, line in self.program:
|
||||
self.symbols['__lno__'] = lno
|
||||
self.symbols['__addr__'] = addr
|
||||
|
||||
if line.origin:
|
||||
addr = self.symval(line.origin[1])
|
||||
if line.instruction:
|
||||
instruction = line.instruction[0]
|
||||
for i, w in enumerate(instruction.assemble(self)):
|
||||
self.rom[addr + i] = w
|
||||
addr += instruction.length
|
||||
|
||||
def main():
|
||||
tabname = "d8_tab.py"
|
||||
opts, args = getopt.getopt(sys.argv[1:], "t:")
|
||||
|
||||
if not args:
|
||||
filename = '-'
|
||||
elif len(args) > 1:
|
||||
raise SystemExit, "usage: %s [-t table] [filename]" % sys.argv[0]
|
||||
else: filename = args[0]
|
||||
|
||||
for k, v in opts:
|
||||
if k == '-t': tabname = v
|
||||
|
||||
if filename == '-': program = sys.stdin.read()
|
||||
else: program = open(filename).read()
|
||||
|
||||
assembler = Assembler()
|
||||
|
||||
def Insn(a, b, *args, **kw):
|
||||
def inner(*toks):
|
||||
if toks is None: return
|
||||
return b(*args + toks, **kw)
|
||||
assembler.InstructionSet[a] = inner
|
||||
|
||||
Value = lambda v: assembler.symval(v)
|
||||
ns = {'__name__': os.path.splitext(os.path.basename(tabname))[0],
|
||||
'Insn': Insn, 'assembler': assembler, 'Value': Value}
|
||||
execfile(tabname, ns)
|
||||
|
||||
|
||||
global Instruction
|
||||
Instruction <<= Or(Group(InstructionPatternToParseElement(k, v))
|
||||
for k, v in assembler.InstructionSet.items())
|
||||
|
||||
assembler.run(program, filename)
|
||||
max_insn = max(assembler.rom.keys())
|
||||
rom = [assembler.rom.get(i) for i in range(max_insn + 1)]
|
||||
|
||||
for i in range(0, len(rom), 8):
|
||||
print "%04x:" % i,
|
||||
for b in rom[i:i+8]:
|
||||
print "%04x" % (b or 0),
|
||||
print
|
||||
|
||||
if __name__ == '__main__': main()
|
||||
Loading…
Reference in a new issue