6 import Prelude hiding (not,and,or)
8 import Data.Bits hiding (xor)
9 import qualified Data.Map as Map
13 import Text.Parsec.String
14 import Text.Parsec.Combinator
16 import Control.Applicative hiding ((<|>))
20 instruction :: LineNo -> Dict -> Parser Word32
21 instruction lno dict = foldl1 (<|>) (fmap (\x -> try (x dict)) instructions) <* char '\n' <?> (". something at line " ++ show lno ++ " is wrong (ignore line 1 hint above, but pay attention for possible line offset due to #include).")
23 testins :: String -> IO ()
25 case (parse (instruction 0 dict) "" (input++"\n")) of
26 Left err -> do { putStr "fail :/\n"; print err}
27 Right x -> do { printf "0x%08X\n" x }
29 dict = (0x8000,[("lolz", 0x1337), ("rofl", 0xaaaa)])
35 iLabel :: Dict -> Parser Word32
36 -- TODO: save msb (=sign) correctly...
37 iLabel d@(aktadr,_) = do {i <- (iLit d); return $ ((i - aktadr)`div`4) .&. 0xffff}
39 iLit :: Dict -> Parser Word32
44 string "@hi"; parseMySpaces;
45 return $ shiftR val 16
47 string "@lo"; parseMySpaces;
48 return $ val .&. 0xffff
49 } <|> do {parseMySpaces; return val}
52 iLit5 d = do i <- iLit d; return $ i .&. 0x001f
53 iLit12 d = do i <- iLit d; return $ i .&. 0x0fff
54 iLit15 d = do i <- iLit d; return $ i .&. 0x7fff
55 iLit16 d = do i <- iLit d; return $ i .&. 0xffff
59 try (do a <- digit; b <- digit; return $ [a,b]) <|> (do a <- digit; return $ [a])
61 read4imm :: String -> Word32
62 read4imm s = if erg > 15 then error "invalid register" else erg
66 reg = do {parseMySpaces; string "r"; ret <- liftM read4imm (imm4); parseMySpaces; return ret}
68 condition :: Parser Word32
70 str <- foldl1 (<|>) (fmap (try . string . fst) conds)
71 let (Just ret) = lookup str conds
74 carry :: Parser Word32
75 carry = do { char 'c'; return 1} <|> do {string ""; return 0}
77 updateDisable :: Parser Word32
78 updateDisable = do { char 'd'; return 1} <|> do {string ""; return 0}
80 highonly :: Parser Word32
81 highonly = do { char 'h'; return 1} <|> do {string ""; return 0}
83 highlow :: Parser Word32
84 highlow = do { char 'h'; return 1} <|> do {char 'l'; return 0} <|> do {string ""; return 0}
87 fill = do { char 'f'; return 1} <|> do {string ""; return 0}
90 sign = do { char 's'; return 1} <|> do {string ""; return 0}
92 branchpred :: Parser Word32
94 x <- do { char '+'; return 1} <|> do {char '-'; return 0} <|> do {string ""; return 0}
98 shiftArith :: Parser Word32
99 shiftArith = do { char 'a'; return 1} <|> do {string ""; return 0}
101 parseBracketClose :: Parser Char
102 parseBracketClose = do { c <- char ')'; parseMySpaces; return c}
104 (<.>) p n = p<*comma<*>n
105 (<%>) p n = p<*space<*>n
106 (<@>) p n = p<*char '('<*>n<*parseBracketClose
111 ins m form e = do {mnem m; form e}
112 csv0i_p dict f = f<$>condition<*>branchpred<*>(iLabel dict)
113 csv0i_p' f = f<$>condition<*>branchpred
114 csv1 f = f<$>condition<%>reg
115 csv1' f = f<$>condition
116 csv1_p f = f<$>condition<%>reg
117 csv2 f = f<$>condition<%>reg<.>reg
118 csv2i dict f = f<$>condition<%>reg<.>(iLit16 dict)
119 csv2_scd f = f<$>sign<*>carry<*>updateDisable<*>condition<%>reg<.>reg
120 csv2m dict f = f<$>condition<%>reg<.>(iLit15 dict)<@>reg
121 csv2i_cd dict f = f<$>carry<*>updateDisable<*>condition<%>reg<.>reg<.>(iLit5 dict)
122 csv2i_d dict f = f<$>updateDisable<*>condition<%>reg<.>reg<.>(iLit5 dict)
123 csv2i_scd dict f = f<$>sign<*>carry<*>updateDisable<*>condition<%>reg<.>reg<.>(iLit12 dict)
124 csv2i_sl dict f = f<$>highonly<*>sign<*>condition<%>reg<.>(iLit16 dict)
125 csv2i_sl' dict f = f<$>sign<*>condition<%>reg<.>(iLit16 dict)
126 csv2i_lfd dict f = f<$>highlow<*>fill<*>updateDisable<*>condition<%>reg<.>(iLit16 dict)
127 csv3_cd f = f<$>carry<*>updateDisable<*>condition<%>reg<.>reg<.>reg
128 csv3_d f = f<$>updateDisable<*>condition<%>reg<.>reg<.>reg
130 instructions = [add, addi, mov, sub, subi,
131 and, andx, or, orx, xor, xorx, not,
133 pop, push, disc, fetch,
134 movpf, movsf, movpt, movst,
135 ldh, ldb, ldw, ldi, ldil,
144 add _ = ins "add" csv3_cd $ aform 0x00
145 addi dict = ins "addi" (csv2i_scd dict) $ aformi 0x02
146 mov _ = ins "mov" csv2_scd $ aformi' 0x02
147 sub _ = ins "sub" csv3_cd $ aform 0x01
148 subi dict = ins "subi" (csv2i_scd dict) $ aformi 0x03
150 and _ = ins "and" csv3_d $ aform 0x04 0
151 andx dict = ins "andx" (csv2i_lfd dict) $ lformi 0x05
152 or _ = ins "or" csv3_d $ aform 0x06 0
153 orx dict = ins "orx" (csv2i_lfd dict) $ lformi 0x07
154 xor _ = ins "xor" csv3_d $ aform 0x08 0
155 xorx dict = ins "xorx" (csv2i_lfd dict) $ lformi 0x09
156 not _ = ins "not" csv1 $ lformi'not 0x09
157 lls dict = ins "lls" (csv2i_cd dict) $ shiform 0x0a 0 0
158 lrs dict = ins "lrs" (csv2i_cd dict) $ shiform 0x0a 1 0
159 ars dict = ins "ars" (csv2i_d dict) $ shiform 0x0a 1 1 0
161 pop _ = ins "pop" csv1 $ sform 0x0b 0x0
162 disc _ = ins "disc" csv1' $ sform' 0x0b 0x1 0
163 fetch _ = ins "fetch" csv1 $ sform 0x0b 0x2
164 push _ = ins "push" csv1 $ sform 0x0b 0x3
165 movpf _ = ins "movpf" csv1 $ sform 0x0c 0x2
166 movsf _ = ins "movsf" csv1 $ sform 0x0c 0x0
167 movpt _ = ins "movpt" csv1 $ sform 0x0d 0x2
168 movst _ = ins "movst" csv1 $ sform 0x0d 0x0
169 ldw dict = ins "ldw" (csv2m dict) $ mformi 0x0e
170 ldh dict = ins "ldh" (csv2m dict) $ mformi 0x10
171 ldb dict = ins "ldb" (csv2m dict) $ mformi 0x12
172 ldi dict = ins "ldi" (csv2i_sl dict) $ lformi' 0x1a
173 ldil dict = ins "ldil" (csv2i_sl' dict) $ lformi' 0x1a 0
174 stw dict = ins "stw" (csv2m dict) $ mformi 0x0f
175 sth dict = ins "sth" (csv2m dict) $ mformi 0x11
176 stb dict = ins "stb" (csv2m dict) $ mformi 0x13
177 ldx dict = ins "ldx" (csv2m dict) $ mformi 0x14
178 stx dict = ins "stx" (csv2m dict) $ mformi 0x15
180 -- set signed by default! in very rare cases this can be an issue.
181 br dict = ins "br" (csv0i_p dict) $ bform 0x16 0x0 1
182 call dict = ins "call" (csv0i_p dict) $ bform 0x16 0x1 1
183 ret _ = ins "ret" csv0i_p' $ bform' 0x16 0x2
184 reti _ = ins "reti" csv0i_p' $ bform' 0x16 0x3
185 brr _ = ins "brr" csv1_p $ brrform 0x17 0
186 callr _ = ins "callr" csv1_p $ brrform 0x17 1
187 cmp _ = ins "cmp" csv2 $ mformi' 0x18
188 cmpi dict = ins "cmpi" (csv2i dict) $ lformi 0x19 0 0 0
190 -- instruction formats
191 aform opcd c d cond rd ra rb = pack [(cond,28),(opcd,23),(rd,19),(ra,15),(rb,11),(free,2),(c,1),(d,0)]
194 aformi opcd s c d cond rd ra imm = pack [(cond,28),(opcd,23),(rd,19),(ra,15),(imm,3),(s,2),(c,1),(d,0)]
195 aformi' opcd s c d cond rd ra = aformi opcd s c d cond rd ra 0
197 lformi opcd hl f d cond rd imm = pack [(cond,28),(opcd,23),(rd,19),(imm,3),(hl,2),(f,1),(d,0)]
198 lformi' opcd hl s cond rd imm = lformi opcd s hl 0 cond rd imm
199 lformi'not opcd cond rd = lformi opcd 0 1 0 cond rd 0xffff
201 mformi opcd cond rd disp ra = pack [(cond,28),(opcd,23),(rd,19),(ra,15),(disp,0)]
202 mformi' opcd cond rd = mformi opcd cond rd 0
204 bform opcd typ s cond bp imm = pack [(cond,28),(opcd,23),(imm,7),(free,4),(typ,2),(bp,1),(s,0)]
206 bform' opcd typ cond bp = bform opcd typ 0 cond bp 0
208 sform opcd typ cond rd = pack [(cond,28),(opcd,23),(rd,19),(typ,17)]
209 sform' opcd typ rd cond = sform opcd typ cond rd
211 brrform opcd typ cond ra = pack [(cond,28),(opcd,23),(ra,19),(typ,2)]
213 shiform opcd lr a c d cond rd ra imm = pack [(cond,28),(opcd,23),(rd,19),(ra,15),(imm,10),(lr,3),(a,2),(c,1),(d,0)]
216 pack bf = foldr1 (.|.) $ map (uncurry rotateL) bf
219 conds :: [(String,Word32)]
221 ("nq", 0x0), ("nz", 0x0),
222 ("eq", 0x1), ("zs", 0x1),
225 ("nc", 0x4), ("ae", 0x4),
226 ("cs", 0x5), ("bl", 0x5),
227 ("ns", 0x6), ("nn", 0x6),
228 ("ss", 0x7), ("ns", 0x7),