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Generate regexps to make addressing easier to read

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Mike Naberezny 2014-12-14 18:05:25 -08:00
parent a996cbceec
commit 02e7953373
1 changed files with 21 additions and 35 deletions
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56
py65/assembler.py
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@ -8,38 +8,22 @@ class Assembler:
r'[,xXyY\s]*)$')
Addressing = (
('zpi', # "($0012)"
r'^\(\$0{BYTE}([0-9A-F]{BYTE})\)$'),
('zpx', # "$0012,X"
r'^\$0{BYTE}([0-9A-F]{BYTE}),X$'),
('zpy', # "$0012,Y"
r'^\$0{BYTE}([0-9A-F]{BYTE}),Y$'),
('zpg', # "$0012"
r'^\$0{BYTE}([0-9A-F]{BYTE})$'),
('inx', # "($0012,X)
r'^\(\$0{BYTE}([0-9A-F]{BYTE}),X\)$'),
('iax', # "($1234,X)
r'^\(\$([0-9A-F]{BYTE})([0-9A-F]{BYTE}),X\)$'),
('iny', # "($0012),Y"
r'^\(\$0{BYTE}([0-9A-F]{BYTE})\),Y$'),
('ind', # "($1234)"
r'^\(\$([0-9A-F]{BYTE})([0-9A-F]{BYTE})\)$'),
('abx', # "$1234,X"
r'^\$([0-9A-F]{BYTE})([0-9A-F]{BYTE}),X$'),
('aby', # "$1234,Y"
r'^\$([0-9A-F]{BYTE})([0-9A-F]{BYTE}),Y$'),
('abs', # "$1234"
r'^\$([0-9A-F]{BYTE})([0-9A-F]{BYTE})$'),
('rel', # "$1234"
r'^\$([0-9A-F]{BYTE})([0-9A-F]{BYTE})$'),
('imp', # ""
r'^$'),
('acc', # ""
r'^$'),
('acc', # "A"
r'^A$'),
('imm', # "#$12"
r'^#\$([0-9A-F]{BYTE})$')
('zpi', "($00FF)"),
('zpx', "$00FF,X"),
('zpy', "$00FF,Y"),
('zpg', "$00FF"),
('inx', "($00FF,X)"),
('iax', "($FFFF,X)"),
('iny', "($00FF),Y"),
('ind', "($FFFF)"),
('abx', "$FFFF,X"),
('aby', "$FFFF,Y"),
('abs', "$FFFF"),
('rel', "$FFFF"),
('imp', ""),
('acc', ""),
('acc', "A"),
('imm', "#$FF")
)
def __init__(self, mpu, address_parser=None):
@ -54,9 +38,11 @@ class Assembler:
self._addressing = []
numchars = mpu.BYTE_WIDTH / 4 # 1 byte = 2 chars in hex
for mode, pattern in self.Addressing:
pattern = pattern.replace('BYTE', '%d' % numchars)
self._addressing.append([mode, re.compile(pattern)])
for mode, format in self.Addressing:
pat = "^" + re.escape(format) + "$"
pat = pat.replace('00', '0{%d}' % numchars)
pat = pat.replace('FF', '([0-9A-F]{%d})' % numchars)
self._addressing.append([mode, re.compile(pat)])
def assemble(self, statement, pc=0000):
""" Assemble the given assembly language statement. If the statement