6 import Prelude hiding (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 :: Dict -> Parser Word32
21 instruction dict = foldl1 (<|>) (fmap (\x -> try (x dict)) instructions) <* char '\n'
23 testins :: String -> IO ()
25 case (parse (instruction 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 iLit :: Dict -> Parser Word32
38 iLit12 d = do i <- iLit d; return $ i .&. 0x0fff
39 iLit15 d = do i <- iLit d; return $ i .&. 0xefff
40 iLit16 d = do i <- iLit d; return $ i .&. 0xffff
44 try (do a <- digit; b <- digit; return $ [a,b]) <|> (do a <- digit; return $ [a])
46 read4imm :: String -> Word32
47 read4imm s = if erg > 15 then error "invalid register" else erg
51 reg = do {parseMySpaces; string "r"; ret <- liftM read4imm (imm4); parseMySpaces; return ret}
53 condition :: Parser Word32
55 str <- foldl1 (<|>) (fmap (try . string . fst) conds)
56 let (Just ret) = lookup str conds
59 carry :: Parser Word32
60 carry = do { char 'c'; return 1} <|> do {string ""; return 0}
62 updateDisable :: Parser Word32
63 updateDisable = do { char 'd'; return 1} <|> do {string ""; return 0}
65 highlow :: Parser Word32
66 highlow = do { char 'h'; return 1} <|> do {char 'l'; return 0} <|> do {string ""; return 0}
69 fill = do { char 'f'; return 1} <|> do {string ""; return 0}
72 sign = do { char 's'; return 1} <|> do {string ""; return 0}
74 branchpred :: Parser Word32
76 x <- do { char '+'; return 1} <|> do {char '-'; return 0} <|> do {string ""; return 0}
80 shiftArith :: Parser Word32
81 shiftArith = do { char 'a'; return 1} <|> do {string ""; return 0}
83 (<.>) p n = p<*comma<*>n
84 (<%>) p n = p<*space<*>n
85 (<@>) p n = p<*char '('<*>n<*char ')'
90 ins m form e = do {mnem m; form e}
91 csv0i_p dict f = f<$>condition<*>branchpred<*>(iLit dict)
92 csv0i_p' f = f<$>condition<*>branchpred
93 csv2_scd f = f<$>sign<*>carry<*>updateDisable<*>condition<%>reg<.>reg
94 csv2m dict f = f<$>condition<%>reg<.>(iLit15 dict)<@>reg
95 csv2i_scd dict f = f<$>sign<*>carry<*>updateDisable<*>condition<%>reg<.>reg<.>(iLit12 dict)
96 csv2i_sl dict f = f<$>sign<*>highlow<*>condition<%>reg<.>(iLit16 dict)
97 csv2i_lfd dict f = f<$>highlow<*>fill<*>updateDisable<*>condition<%>reg<.>(iLit16 dict)
98 csv3_cd f = f<$>carry<*>updateDisable<*>condition<%>reg<.>reg<.>reg
99 csv3_d f = f<$>updateDisable<*>condition<%>reg<.>reg<.>reg
101 instructions = [add, addi, mov, sub, subi,
103 --, or, orx, xor, xorx,not]
104 -- pop, push, disc, fetch
105 -- movpf, movsf, movpt, movst
117 add _ = ins "add" csv3_cd $ aform 0x00
118 addi dict = ins "addi" (csv2i_scd dict) $ aformi 0x02
119 mov _ = ins "mov" csv2_scd $ aformi' 0x02
120 sub _ = ins "sub" csv3_cd $ aform 0x01
121 subi dict = ins "subi" (csv2i_scd dict) $ aformi 0x03
123 and _ = ins "and" csv3_d $ aform 0x04 0
124 andx dict = ins "andx" (csv2i_lfd dict) $ lformi 0x05
126 ldw dict = ins "ldw" (csv2m dict) $ mformi 0x0e
127 ldi dict = ins "ldi" (csv2i_sl dict) $ lformi' 0x1a
129 -- set signed by default! in very rare cases this can be an issue.
130 br dict = ins "br" (csv0i_p dict) $ bform 0x16 0x0 1
131 ret _ = ins "ret" csv0i_p' $ bform' 0x16 0x2
132 reti _ = ins "reti" csv0i_p' $ bform' 0x16 0x3
134 -- instruction formats
135 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)]
138 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)]
139 aformi' opcd s c d cond rd ra = aformi opcd s c d cond rd ra 0
141 lformi opcd hl f d cond rd imm = pack [(cond,28),(opcd,23),(rd,19),(imm,3),(hl,2),(f,1),(d,0)]
142 lformi' opcd s hl cond rd imm = lformi opcd s hl 0 cond rd imm
144 mformi opcd cond rd disp ra = pack [(cond,28),(opcd,23),(rd,19),(ra,15),(disp,0)]
146 bform opcd typ s cond bp imm = pack [(cond,28),(opcd,23),(imm,7),(free,4),(typ,2),(bp,1),(s,0)]
148 bform' opcd typ cond bp = bform opcd typ 0 cond bp 0
150 -- ppc64 stuff (TODO: remove)
151 iform opcd aa lk li = pack [(opcd,6),(li,30),(aa,31),(lk,0)]
152 scform opcd lev = pack [(opcd,6),(lev,27),(1,31)]
153 dform'b opcd bf l ra si = pack [(opcd,6),(bf,9),(0,10),(l,11),(ra,16),(si,0)]
154 dsform opcd rt ra ds xo = pack [(opcd,6),(rt,11),(ra,16),(ds,30),(xo,0)]
155 xform'a opcd rt ra rb xo = pack [(opcd,6),(rt,11),(ra,16),(rb,21),(xo,31)]
156 xform'b opcd xo bf l ra rb = pack [(opcd,6),(bf,9),(0,10),(l,11),(ra,16),(rb,21),(xo,31),(0,0)]
157 xform'c opcd xo rs ra rb rc = pack [(opcd,6),(rs,11),(ra,16),(rb,21),(xo,31),(rc,0)]
158 xform'd opcd xo rc rs ra = pack [(opcd,6),(rs,11),(ra,16),(0,21),(xo,31),(rc,0)]
159 xlform'a opcd xo bt ba bb = pack [(opcd,6),(bt,11),(ba,16),(bb,21),(xo,31)]
160 xlform'b opcd xo lk bo bi bh = pack [(opcd,6),(bo,11),(bi,16),(bh,21),(xo,31),(lk,0)]
161 xlform'c opcd xo bf bfa = pack [(opcd,6),(bf,9),(bfa,14),(xo,31)]
162 xfxform opcd xo rs spr = pack [(opcd,6),(rs,11),(spr,21),(xo,31)]
163 xfxform'b opcd h xo fxm rs = pack [(opcd,6),(rs,11),(h,12),(fxm,20),(xo,31)]
166 xsform opcd xo rc ra rs sh = pack [(opcd,6),(rs,11),(ra,16),(sh,21),(xo,30),(sh,31),(rc,0)]
167 xoform' opcd xo oe rc rt ra = pack [(opcd,6),(rt,11),(ra,16),(0,21),(oe,22),(xo,31),(rc,0)]
169 mform opcd rc ra rs sh mb me = pack [(opcd,6),(rs,11),(ra,16),(sh,21),(mb,26),(me,31),(rc,0)]
170 -- mdform needs to be fixed to handle sh correctly
171 mdform opcd h rc ra rs sh mb = pack [(opcd,6),(rs,11),(ra,16),(sh,21),(mb,27),(h,30),(sh,31),(rc,0)]
172 mdsform opcd h rc ra rs rb mb = pack [(opcd,6),(rs,11),(ra,16),(rb,21),(mb,27),(h,31),(rc,0)]
175 pack bf = foldr1 (.|.) $ map (uncurry rotateL) bf
178 conds :: [(String,Word32)]
180 ("nq", 0x0), ("nz", 0x0),
181 ("eq", 0x1), ("zs", 0x1),
184 ("nc", 0x4), ("ae", 0x4),
185 ("cs", 0x5), ("bl", 0x5),
186 ("ns", 0x6), ("nn", 0x6),
187 ("ss", 0x7), ("ns", 0x7),