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|
(* ppcDarwinPseudoOps.sml
*
* COPYRIGHT (c) 2002 Bell labs, Lucent Technologies.
*
* PPC/Darwin (aka MacOS X) pseudo operations.
*)
functor PPCDarwinPseudoOps (
structure T : MLTREE
structure MLTreeEval : MLTREE_EVAL (* where T = T *)
where type T.Basis.cond = T.Basis.cond
and type T.Basis.div_rounding_mode = T.Basis.div_rounding_mode
and type T.Basis.ext = T.Basis.ext
and type T.Basis.fcond = T.Basis.fcond
and type T.Basis.rounding_mode = T.Basis.rounding_mode
and type T.Constant.const = T.Constant.const
and type ('s,'r,'f,'c) T.Extension.ccx = ('s,'r,'f,'c) T.Extension.ccx
and type ('s,'r,'f,'c) T.Extension.fx = ('s,'r,'f,'c) T.Extension.fx
and type ('s,'r,'f,'c) T.Extension.rx = ('s,'r,'f,'c) T.Extension.rx
and type ('s,'r,'f,'c) T.Extension.sx = ('s,'r,'f,'c) T.Extension.sx
and type T.I.div_rounding_mode = T.I.div_rounding_mode
and type T.Region.region = T.Region.region
and type T.ccexp = T.ccexp
and type T.fexp = T.fexp
(* and type T.labexp = T.labexp *)
and type T.mlrisc = T.mlrisc
and type T.oper = T.oper
and type T.rep = T.rep
and type T.rexp = T.rexp
and type T.stm = T.stm
) : PSEUDO_OPS_BASIS = struct
structure T = T
structure PB = PseudoOpsBasisTyp
structure Fmt = Format
structure Endian = PseudoOpsBig (
structure T = T
structure MLTreeEval=MLTreeEval
val icache_alignment = 16
val max_alignment = SOME 7
val nop = {sz=4, en=0wx60000000: Word32.word}) (* FIX:: ori 0, 0, 0 *)
(* EXPAND
structure GasPseudoOps =
GasPseudoOps(structure T = T
val labFmt = {gPrefix="", aPrefix="L"})
*)
type 'a pseudo_op = (T.labexp, 'a) PB.pseudo_op
fun error msg = MLRiscErrorMsg.error ("PPCDarwinPseudoOps.", msg)
val sizeOf = Endian.sizeOf
val emitValue = Endian.emitValue
val labelToString = Label.fmt {gPrefix="", aPrefix="L"}
fun prIntInf i =
if IntInf.sign i < 0 then "-"^IntInf.toString(IntInf.~ i)
else IntInf.toString i
fun prInt i = if i < 0 then "-"^Int.toString(~i) else Int.toString i
(* operator precedences:
Note: these differ from C's precedences
2 MULT, DIV, LSHIFT, RSHIFT
1 AND, OR
0 PLUS, MINUS
*)
fun parens (str, prec, op_prec) =
if prec > op_prec then "(" ^ str ^ ")" else str
fun lexpToString le = toStr(le, 0)
and toStr(T.LABEL lab, _) = labelToString lab
| toStr(T.LABEXP le, p) = toStr(le, p)
| toStr(T.CONST c, _) =
(prInt(T.Constant.valueOf c) handle _ => T.Constant.toString c)
| toStr(T.LI i, _) = prIntInf i
| toStr(T.MULS(_,lexp1, lexp2), _) = toStr(lexp1, 2) ^ "*" ^ toStr(lexp2,2)
| toStr(T.DIVS(T.DIV_TO_ZERO,_,lexp1, lexp2), _) =
toStr(lexp1, 2) ^ "/" ^ toStr(lexp2,2)
| toStr(T.SLL(_,lexp, cnt), prec) = toStr(lexp,2) ^ "<<" ^ toStr(cnt,2)
| toStr(T.SRL(_,lexp, cnt), prec) = toStr(lexp,2) ^ ">>" ^ toStr(cnt,2)
| toStr(T.ANDB(_,lexp, mask), prec) =
parens(toStr(lexp,1) ^ "&" ^ toStr(mask, 1), prec, 1)
| toStr(T.ORB(_,lexp, mask), prec) =
parens(toStr(lexp, 1) ^ "|" ^ toStr(mask, 1), prec, 1)
| toStr(T.ADD(_,lexp1, lexp2), prec) =
parens(toStr(lexp1, 0) ^ "+" ^ toStr(lexp2, 0), prec, 0)
| toStr(T.SUB(_,lexp1, lexp2), prec) =
parens(toStr(lexp1, 0) ^ "-" ^ toStr(lexp2, 0), prec, 0)
| toStr _ = error "toStr"
fun decls (fmt, labs) =
String.concat
(map (fn lab => (Fmt.format fmt [Fmt.STR (lexpToString(T.LABEL lab))])) labs)
fun toString(PB.ALIGN_SZ n) = Fmt.format "\t.align\t%d" [Fmt.INT n]
| toString(PB.ALIGN_ENTRY) = "\t.align\t4" (* 16 byte boundary *)
| toString(PB.ALIGN_LABEL) = "\t.align\t2"
| toString(PB.DATA_LABEL lab) = labelToString lab ^ ":"
| toString(PB.DATA_READ_ONLY) = "\t.const_data"
| toString(PB.DATA) = "\t.data"
| toString(PB.BSS) = "\t.section\t__DATA,__BSS"
| toString(PB.TEXT) = "\t.text"
| toString(PB.SECTION at) = "\t.section\t" ^ Atom.toString at
| toString(PB.REORDER) = ""
| toString(PB.NOREORDER) = ""
| toString(PB.INT{sz, i}) = let
fun join [] = []
| join [lexp] = [lexpToString lexp]
| join (lexp::r) = lexpToString lexp :: "," :: join r
val pop = (case sz
of 8 => "\t.byte\t"
| 16 => "\t.short\t"
| 32 => "\t.long\t"
| 64 => error "INT64"
| _ => error ("pop: INT sz = " ^ Int.toString sz)
(* end case *))
in
String.concat (pop :: join i)
end
| toString(PB.ASCII s) =
Fmt.format "\t.ascii\t\"%s\"" [Fmt.STR(String.toCString s)]
| toString(PB.ASCIIZ s) =
Fmt.format "\t.asciz \"%s\"" [Fmt.STR(String.toCString s)]
| toString(PB.SPACE sz) = Fmt.format "\t.space\t%d" [Fmt.INT sz]
| toString(PB.FLOAT{sz, f}) = let
fun join [] = []
| join [f] = [f]
| join (f::r) = f :: "," :: join r
val pop = (case sz
of 32 => "\t.single "
| 64 => "\t.double "
| _ => error ("pop: FLOAT sz = " ^ Int.toString sz)
(* end case *))
in
String.concat (pop :: join f)
end
| toString(PB.IMPORT labs) = decls("\t.extern\t%s", labs)
| toString(PB.EXPORT labs) = decls("\t.globl\t%s", labs)
| toString(PB.COMMENT txt) = Fmt.format "; %s" [Fmt.STR txt]
| toString(PB.EXT _) = error "EXT"
fun defineLabel lab = labelToString lab ^ ":"
val wordSize = 32
end
|
