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|
exception Error
type pos = int
type svalue = Tokens.svalue
type ('a,'b) token = ('a,'b) Tokens.token
type lexresult = (svalue,pos) token
type lexarg = {srcMap : SourceMapping.sourcemap,
err : pos * pos * string -> unit,
MDLmode : bool
}
type arg = lexarg
open Tokens
val commentLevel = ref 0
val metaLevel = ref 0
val asmLQuote = ref "``"
val asmRQuote = ref "''"
val asmLMeta = ref "<"
val asmRMeta = ref ">"
exception Error
fun init() = (commentLevel := 0; metaLevel := 0;
asmLQuote := "``"; asmRQuote := "''";
asmLMeta := "<"; asmRMeta := ">"
)
fun eof{srcMap,err,MDLmode} =
let val pos = SourceMapping.currPos srcMap
in EOF(pos,pos) end
fun debug _ = ()
fun check(err,_,_,SOME w) = w
| check(err,pos,s,NONE) =
(err(pos,pos+size s,"bad literal "^s); raise Error)
fun strip k s = String.substring(s,k,String.size s - k)
fun scan err fmt (s,s') tok pos =
tok(check(err,pos,s,StringCvt.scanString fmt s'),
pos,pos + size s)
handle _ => ID(s,pos,pos)
fun wdecimal(err,s,pos) =
scan err (Word32.scan StringCvt.DEC) (s,strip 2 s) WORD pos
fun whex(err,s,pos) =
scan err (Word32.scan StringCvt.HEX) (s,strip 3 s) WORD pos
fun woctal(err,s,pos) = scan err (Word32.scan StringCvt.OCT) (s,strip 3 s) WORD pos
fun wbinary(err,s,pos) = scan err (Word32.scan StringCvt.BIN) (s,strip 3 s) WORD pos
fun decimal(err,s,pos) = scan err (Int.scan StringCvt.DEC) (s,s) INT pos
fun real(err,s,pos) = scan err (Real.scan) (s,s)
(fn (x,y,z) => REAL(Real.toString x, y, z)) pos
fun hex(err,s,pos) = scan err (Int.scan StringCvt.HEX) (s,strip 2 s) INT pos
fun octal(err,s,pos) = scan err (Int.scan StringCvt.OCT) (s,strip 2 s) INT pos
fun binary(err,s,pos) = scan err (Int.scan StringCvt.BIN) (s,strip 2 s) INT pos
fun decimalinf(err,s,pos) = scan err (IntInf.scan StringCvt.DEC) (s,s) INTINF pos
fun hexinf(err,s,pos) = scan err (IntInf.scan StringCvt.HEX) (s,strip 2 s) INTINF pos
fun octalinf(err,s,pos) = scan err (IntInf.scan StringCvt.OCT) (s,strip 2 s) INTINF pos
fun binaryinf(err,s,pos) = scan err (IntInf.scan StringCvt.BIN) (s,strip 2 s) INTINF pos
fun string(err,s,pos) =
STRING(
check(err,pos,s,String.fromString(String.substring(s,1,String.size s-2))),
pos, pos + size s)
fun char(err,s,pos) =
CHAR(check(err,pos,s,Char.fromString(String.substring(s,2,String.size s-3))),
pos,pos + size s)
fun transAsm s =
let fun loop(#"\\" :: #"<" ::s) = #"<"::loop s
| loop(#"\\" :: #">" ::s) = #">"::loop s
| loop(c::s) = c::loop s
| loop [] = []
in String.implode(loop(String.explode s))
end
fun asmtext(err,s,pos) =
ASMTEXT(check(err,pos,s,String.fromString(transAsm s)),pos,pos + size s)
infix $$
fun x $$ y = y :: x
exception NotFound
val keywords = HashTable.mkTable (HashString.hashString,op =) (13,NotFound)
: (string,int * int -> (svalue,int) token) HashTable.hash_table
val MDLkeywords = HashTable.mkTable (HashString.hashString,op =) (13,NotFound)
: (string,int * int -> (svalue,int) token) HashTable.hash_table
val symbols = HashTable.mkTable (HashString.hashString,op =) (13,NotFound)
: (string,int * int -> (svalue,int) token) HashTable.hash_table
val _ = app (HashTable.insert keywords)
( nil $$
("_",WILD) $$
("datatype", DATATYPE) $$
("type", TYPE) $$
("end", END) $$
("fun", FUN) $$
("fn", FN) $$
("val", VAL) $$
("raise", RAISE) $$
("handle", HANDLE) $$
("let", LET) $$
("local", LOCAL) $$
("exception", EXCEPTION) $$
("structure", STRUCTURE) $$
("signature", SIGNATURE) $$
("functor", FUNCTOR) $$
("sig", SIG) $$
("struct", STRUCT) $$
("sharing", SHARING) $$
("where", WHERE) $$
("withtype", WITHTYPE) $$
("if", IF) $$
("then", THEN) $$
("else", ELSE) $$
("in", IN) $$
("true", TRUE) $$
("false", FALSE) $$
("and", AND) $$
("at", AT) $$
("of", OF) $$
("case", CASE) $$
("as", AS) $$
("open", OPEN) $$
("op", OP) $$
("include", INCLUDE) $$
("infix", INFIX) $$
("infixr", INFIXR) $$
("nonfix", NONFIX) $$
("not", NOT)
)
val _ = app (HashTable.insert MDLkeywords)
( nil $$
("architecture", ARCHITECTURE) $$
("assembly", ASSEMBLY) $$
("storage", STORAGE) $$
("locations", LOCATIONS) $$
("equation", EQUATION) $$
("at", AT) $$
("vliw", VLIW) $$
("field", FIELD) $$
("fields", FIELDS) $$
("signed", SIGNED) $$
("unsigned", UNSIGNED) $$
("superscalar", SUPERSCALAR) $$
("bits", BITS) $$
("ordering", ORDERING) $$
("little", LITTLE) $$
("big", BIG) $$
("endian", ENDIAN) $$
("register", REGISTER) $$
("as", AS) $$
("cell", CELL) $$
("cells", CELLS) $$
("cellset", CELLSET) $$
("pipeline", PIPELINE) $$
("cpu", CPU) $$
("resource", RESOURCE) $$
("reservation", RESERVATION) $$
("table", TABLE) $$
("latency", LATENCY) $$
("predicated", PREDICATED) $$
("instruction", INSTRUCTION) $$
("formats", FORMATS) $$
("uppercase", UPPERCASE) $$
("lowercase", LOWERCASE) $$
("verbatim", VERBATIM) $$
("span", SPAN) $$
("dependent", DEPENDENT) $$
("always", ALWAYS) $$
("never", NEVER) $$
("delayslot", DELAYSLOT) $$
(* ("branching", BRANCHING) $$ *)
("candidate", CANDIDATE) $$
("rtl", RTL) $$
("debug", DEBUG) $$
("aliasing", ALIASING) $$
("aggregable",AGGREGABLE)
)
val _ = app (HashTable.insert symbols)
(
nil $$
("=", EQ) $$
("*", TIMES) $$
(":", COLON) $$
(":>",COLONGREATER) $$
("|", BAR) $$
("->", ARROW) $$
("=>", DARROW) $$
("#", HASH) $$
("!", DEREF) $$
("^^", CONCAT)
)
fun lookup(MDLmode,s,yypos) =
let val l = String.size s
fun id() = ID(UniqueSymbol.toString
(UniqueSymbol.fromString s), yypos, yypos + l)
in HashTable.lookup keywords s (yypos,yypos + l)
handle _ =>
(if MDLmode then
(HashTable.lookup MDLkeywords s (yypos,yypos + l) handle _ => id())
else id()
)
end
fun lookupSym(s,yypos) =
let val l = String.size s
in HashTable.lookup symbols s (yypos,yypos + l)
handle _ => SYMBOL(UniqueSymbol.toString
(UniqueSymbol.fromString s), yypos, yypos + l)
end
%%
%header (functor MDLLexFun(Tokens : MDL_TOKENS));
%arg ({srcMap,err,MDLmode});
%reject
alpha=[A-Za-z];
digit=[0-9];
id=[A-Za-z_][A-Za-z0-9_\']*;
tyvar=\'{id};
decimal={digit}+;
integer=~?{decimal};
real={integer}\.{decimal}(e{integer})?;
octal=0[0-7]+;
hex=0x[0-9a-fA-F]+;
binary=0b[0-1]+;
wdecimal=0w{digit}+;
woctal=0w0[0-7]+;
whex=0wx[0-9a-fA-F]+;
wbinary=0wb[0-1]+;
ws=[\ \t];
string=\"([^\\\n\t"]|\\.)*\";
char=#\"([^\\\n\t"]|\\.)*\";
sym1=(\-|[=\.+~/*:!@#$%^&*|?])+;
sym2=`+|'+|\<+|\>+|\=\>|~\>\>;
sym3=\\.;
asmsymbol={sym1}|{sym2}|{sym3};
symbol=(\-|[=+~/*:!@#$%^&*|?<>])+|``|'';
asmtext=([^\n\t<>']+|');
inf=i;
%s COMMENT ASM ASMQUOTE;
%%
<INITIAL,COMMENT,ASM>\n => (SourceMapping.newline srcMap yypos; continue());
<INITIAL,COMMENT,ASM>{ws} => (continue());
<ASMQUOTE>\n => (err(yypos,yypos+size yytext,
"newline in assembly text!"); continue());
<INITIAL>"(*" => (commentLevel := 1; YYBEGIN COMMENT; continue());
<INITIAL,ASM>{integer} => (decimal(err,yytext,yypos));
<INITIAL,ASM>{hex} => (hex(err,yytext,yypos));
<INITIAL,ASM>{octal} => (octal(err,yytext,yypos));
<INITIAL,ASM>{binary} => (binary(err,yytext,yypos));
<INITIAL,ASM>{integer}{inf} => (decimalinf(err,yytext,yypos));
<INITIAL,ASM>{hex}{inf} => (hexinf(err,yytext,yypos));
<INITIAL,ASM>{octal}{inf} => (octalinf(err,yytext,yypos));
<INITIAL,ASM>{binary}{inf} => (binaryinf(err,yytext,yypos));
<INITIAL,ASM>{wdecimal} => (wdecimal(err,yytext,yypos));
<INITIAL,ASM>{whex} => (whex(err,yytext,yypos));
<INITIAL,ASM>{woctal} => (woctal(err,yytext,yypos));
<INITIAL,ASM>{wbinary} => (wbinary(err,yytext,yypos));
<INITIAL,ASM>{string} => (string(err,yytext,yypos));
<INITIAL,ASM>{char} => (char(err,yytext,yypos));
<INITIAL,ASM>{real} => (real(err,yytext,yypos));
<INITIAL,ASM>"$" => (if MDLmode then DOLLAR(yypos,yypos+1)
else SYMBOL("$",yypos,yypos+1));
<INITIAL,ASM>"asm:" => (if MDLmode then
ASM_COLON(yypos,yypos+size yytext) else REJECT());
<INITIAL,ASM>"mc:" => (if MDLmode then
MC_COLON(yypos,yypos+size yytext) else REJECT());
<INITIAL,ASM>"rtl:" => (if MDLmode then
RTL_COLON(yypos,yypos+size yytext) else REJECT());
<INITIAL,ASM>"delayslot:" => (if MDLmode then
DELAYSLOT_COLON(yypos,size yytext) else REJECT());
<INITIAL,ASM>"padding:" => (if MDLmode then
PADDING_COLON(yypos,size yytext) else REJECT());
<INITIAL,ASM>"nullified:" => (if MDLmode then
NULLIFIED_COLON(yypos,size yytext) else REJECT());
<INITIAL,ASM>"candidate:" => (if MDLmode then
CANDIDATE_COLON(yypos,size yytext) else REJECT());
<INITIAL,ASM>{id} => (lookup(MDLmode,yytext,yypos));
<INITIAL,ASM>{tyvar} => (TYVAR(yytext,yypos,yypos + size yytext));
<INITIAL,ASM>"(" => (LPAREN(yypos,yypos+1));
<INITIAL,ASM>")" => (RPAREN(yypos,yypos+1));
<INITIAL,ASM>"[" => (LBRACKET(yypos,yypos+1));
<INITIAL,ASM>"#[" => (LHASHBRACKET(yypos,yypos+1));
<INITIAL,ASM>"]" => (RBRACKET(yypos,yypos+1));
<INITIAL,ASM>"{" => (LBRACE(yypos,yypos+1));
<INITIAL,ASM>"}" => (RBRACE(yypos,yypos+1));
<INITIAL,ASM>"," => (COMMA(yypos,yypos+1));
<INITIAL,ASM>";" => (SEMICOLON(yypos,yypos+1));
<INITIAL,ASM>"." => (DOT(yypos,yypos+1));
<INITIAL,ASM>".." => (DOTDOT(yypos,yypos+2));
<INITIAL,ASM>"..." => (DOTDOT(yypos,yypos+3));
<INITIAL>{symbol} => (if yytext = !asmLQuote then
(debug("lquote "^yytext^"\n");
YYBEGIN ASMQUOTE;
LDQUOTE(yypos,yypos+size yytext))
else
lookupSym(yytext,yypos));
<ASMQUOTE>{asmsymbol} => (if yytext = !asmRQuote then
(if !metaLevel <> 0 then
err(yypos,yypos+size yytext,
"Mismatch between "^(!asmLMeta)^
" and "^(!asmRMeta)) else ();
debug("rquote "^yytext^"\n");
YYBEGIN INITIAL;
RDQUOTE(yypos,yypos+size yytext))
else if yytext = !asmLMeta then
(metaLevel := !metaLevel + 1;
debug("lmeta "^yytext^"\n");
YYBEGIN ASM; LMETA(yypos,yypos+size yytext))
else
asmtext(err,yytext,yypos));
<ASM>{asmsymbol} => (if yytext = !asmRMeta then
(metaLevel := !metaLevel - 1;
debug("rmeta "^yytext^"("^Int.toString(!metaLevel)^")\n");
if !metaLevel = 0 then YYBEGIN ASMQUOTE
else (); RMETA(yypos,yypos+size yytext))
else
lookupSym(yytext,yypos));
<ASMQUOTE>{asmtext} => (debug("text="^yytext^"\n");
asmtext(err,yytext,yypos));
<COMMENT>"*)" => (commentLevel := !commentLevel - 1;
if !commentLevel = 0 then YYBEGIN INITIAL else ();
continue());
<COMMENT>"(*" => (commentLevel := !commentLevel + 1; continue());
<COMMENT>. => (continue());
. => (err(yypos,yypos+size yytext,
"unknown character "^String.toString yytext);
continue());
|
