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|
(* labelExp.sml -- expressions involving labels
*
* COPYRIGHT (c) 1995 AT&T Bell Laboratories.
*
*)
functor LabelExp
(structure T : MLTREE
(* Hashing extensions *)
val hashSext : T.hasher -> T.sext -> word
val hashRext : T.hasher -> T.rext -> word
val hashFext : T.hasher -> T.fext -> word
val hashCCext : T.hasher -> T.ccext -> word
(* Equality extensions *)
val eqSext : T.equality -> T.sext * T.sext -> bool
val eqRext : T.equality -> T.rext * T.rext -> bool
val eqFext : T.equality -> T.fext * T.fext -> bool
val eqCCext : T.equality -> T.ccext * T.ccext -> bool
(* assembly output *)
val labelFmt : {gPrefix : string, aPrefix: string}
) : LABELEXP =
struct
structure T = T
structure I = T.I
structure Constant = T.Constant
structure B = T.Basis
structure C = CellsBasis
structure W = Word
val w = W.fromInt
val i2s = Int.toString
val toLower = String.map Char.toLower
fun error msg = MLRiscErrorMsg.error("LabelExp",msg)
fun wv(C.CELL{id, ...}) = w id
fun wvs is =
let fun f([],h) = h
| f(i::is,h) = f(is,wv i+h)
in f(is,0w0) end
(*
* Hashing
*)
val hashLabel = Label.hash
fun hasher() = {stm=hashStm, rexp=hashRexp, fexp=hashFexp, ccexp=hashCCexp}
and hashCtrl ctrl = wv ctrl
and hashStm stm =
case stm of
T.MV(t,dst,rexp) => 0w123 + w t + wv dst + hashRexp rexp
| T.CCMV(dst,ccexp) => 0w1234 + wv dst + hashCCexp ccexp
| T.FMV(fty,dst,fexp) => 0w12345 + w fty + wv dst + hashFexp fexp
| T.COPY(ty,dst,src) => 0w234 + w ty + wvs dst + wvs src
| T.FCOPY(fty,dst,src) => 0w456 + w fty + wvs dst + wvs src
| T.JMP(ea,labels) => 0w45 + hashRexp ea
| T.CALL{funct,targets,defs,uses,region,pops} =>
hashRexp funct + hashMlriscs defs + hashMlriscs uses
| T.RET _ => 0w567
| T.STORE(ty,ea,data,mem) => 0w888 + w ty + hashRexp ea + hashRexp data
| T.FSTORE(fty,ea,data,mem) => 0w7890 + w fty + hashRexp ea + hashFexp data
| T.BCC(a,lab) => 0w233 + hashCCexp a + hashLabel lab
| T.IF(a,b,c) => 0w233 + hashCCexp a + hashStm b + hashStm c
| T.ANNOTATION(stm, a) => hashStm stm
| T.PHI{preds,block} => w block
| T.SOURCE => 0w123
| T.SINK => 0w423
| T.REGION(stm,ctrl) => hashStm stm + hashCtrl ctrl
| T.RTL{hash,...} => hash
| T.SEQ ss => hashStms(ss, 0w23)
| T.ASSIGN(ty,lhs,rhs) => w ty + hashRexp lhs + hashRexp rhs
| _ => error "hashStm"
and hashStms([],h) = h
| hashStms(s::ss,h) = hashStms(ss,hashStm s + h)
and hashMlrisc(T.CCR ccexp) = hashCCexp ccexp
| hashMlrisc(T.GPR rexp) = hashRexp rexp
| hashMlrisc(T.FPR fexp) = hashFexp fexp
and hashMlriscs [] = 0w123
| hashMlriscs(m::ms) = hashMlrisc m + hashMlriscs ms
and hash2(ty,x,y) = w ty + hashRexp x + hashRexp y
and hashRexp rexp =
case rexp of
T.REG(ty, src) => w ty + wv src
| T.LI i => I.hash i
| T.LABEL l => hashLabel l
| T.LABEXP le => hashRexp rexp
| T.CONST c => Constant.hash c
| T.NEG(ty, x) => w ty + hashRexp x + 0w24
| T.ADD x => hash2 x + 0w234
| T.SUB x => hash2 x + 0w456
| T.MULS x => hash2 x + 0w2131
| T.DIVS x => hash2 x + 0w156
| T.QUOTS x => hash2 x + 0w1565
| T.REMS x => hash2 x + 0w231
| T.MULU x => hash2 x + 0w123
| T.DIVU x => hash2 x + 0w1234
| T.REMU x => hash2 x + 0w211
| T.NEGT(ty, x) => w ty + hashRexp x + 0w1224
| T.ADDT x => hash2 x + 0w1219
| T.SUBT x => hash2 x + 0w999
| T.MULT x => hash2 x + 0w7887
| T.DIVT x => hash2 x + 0w88884
| T.QUOTT x => hash2 x + 0w8884
| T.REMT x => hash2 x + 0w99
| T.ANDB x => hash2 x + 0w12312
| T.ORB x => hash2 x + 0w558
| T.XORB x => hash2 x + 0w234
| T.EQVB x => hash2 x + 0w734
| T.NOTB(ty, x) => w ty + hashRexp x
| T.SRA x => hash2 x + 0w874
| T.SRL x => hash2 x + 0w223
| T.SLL x => hash2 x + 0w499
| T.COND(ty,e,e1,e2) => w ty + hashCCexp e + hashRexp e1 + hashRexp e2
| T.SX(ty, ty', rexp) => 0w232 + w ty + w ty' + hashRexp rexp
| T.ZX(ty, ty', rexp) => 0w737 + w ty + w ty' + hashRexp rexp
| T.CVTF2I(ty, round, ty', fexp) =>
w ty + B.hashRoundingMode round + w ty' + hashFexp fexp
| T.LOAD(ty, ea, mem) => w ty + hashRexp ea + 0w342
| T.LET(stm, rexp) => hashStm stm + hashRexp rexp
| T.PRED(e, ctrl) => hashRexp e + hashCtrl ctrl
| T.MARK(e, _) => hashRexp e
| T.REXT(ty, rext) => w ty + hashRext (hasher()) rext
| T.??? => 0w485
| T.OP(ty,oper,es) => hashRexps(es, w ty + hashOper oper)
| T.ARG _ => 0w23
| T.$(ty, k, e) => w ty + hashRexp e
| T.PARAM n => w n
| T.BITSLICE(ty, sl, e) => w ty + hashRexp e
and hashOper(T.OPER{hash, ...}) = hash
and hashRexps([],h) = h
| hashRexps(e::es,h) = hashRexps(es,hashRexp e + h)
and hash2'(ty,x,y) = w ty + hashFexp x + hashFexp y
and hashFexp fexp =
case fexp of
T.FREG(fty, src) => w fty + wv src
| T.FLOAD(fty, ea, mem) => w fty + hashRexp ea
| T.FADD x => hash2' x + 0w123
| T.FMUL x => hash2' x + 0w1234
| T.FSUB x => hash2' x + 0w12345
| T.FDIV x => hash2' x + 0w234
| T.FCOPYSIGN x => hash2' x + 0w883
| T.FCOND(fty,c,x,y) => w fty + hashCCexp c + hashFexp x + hashFexp y
| T.FABS(fty, fexp) => w fty + hashFexp fexp + 0w2345
| T.FNEG(fty, fexp) => w fty + hashFexp fexp + 0w23456
| T.FSQRT(fty, fexp) => w fty + hashFexp fexp + 0w345
| T.CVTI2F(fty, ty, rexp) => w fty + w ty + hashRexp rexp
| T.CVTF2F(fty, fty', fexp) => w fty + hashFexp fexp + w fty'
| T.FMARK(e, _) => hashFexp e
| T.FPRED(e, ctrl) => hashFexp e + hashCtrl ctrl
| T.FEXT(fty, fext) => w fty + hashFext (hasher()) fext
and hashFexps([],h) = h
| hashFexps(e::es,h) = hashFexps(es,hashFexp e + h)
and hashCCexp ccexp =
case ccexp of
T.CC(cc, src) => B.hashCond cc + wv src
| T.FCC(fcc, src) => B.hashFcond fcc + wv src
| T.CMP(ty, cond, x, y) =>
w ty + B.hashCond cond + hashRexp x + hashRexp y
| T.FCMP(fty, fcond, x, y) =>
w fty + B.hashFcond fcond + hashFexp x + hashFexp y
| T.NOT x => 0w2321 + hashCCexp x
| T.AND(x,y) => 0w2321 + hashCCexp x + hashCCexp y
| T.OR(x,y) => 0w8721 + hashCCexp x + hashCCexp y
| T.XOR(x,y) => 0w6178 + hashCCexp x + hashCCexp y
| T.EQV(x,y) => 0w178 + hashCCexp x + hashCCexp y
| T.TRUE => 0w0
| T.FALSE => 0w1232
| T.CCMARK(e, _) => hashCCexp e
| T.CCEXT(ty,ccext) => w ty + hashCCext (hasher()) ccext
and hashCCexps([],h) = h
| hashCCexps(e::es,h) = hashCCexps(es,hashCCexp e + h)
val eqLabel = Label.same
fun eqLabels([],[]) = true
| eqLabels(a::b,c::d) = eqLabel(a,c) andalso eqLabels(b,d)
| eqLabels _ = false
and eqCell(C.CELL{id=x, ...},C.CELL{id=y, ...}) = x=y
and eqCells([], []) = true
| eqCells(x::xs,y::ys) = eqCell(x,y) andalso eqCells(xs,ys)
| eqCells _ = false
and eqCopy((t1,dst1,src1),(t2,dst2,src2)) =
t1=t2 andalso eqCells(dst1,dst2) andalso eqCells(src1,src2)
and eqCtrl(c1,c2) = eqCell(c1,c2)
and eqCtrls(c1,c2) = eqCells(c1,c2)
(* statements *)
and equality() = {stm=eqStm, rexp=eqRexp, fexp=eqFexp, ccexp=eqCCexp}
and eqStm(T.MV(a,b,c),T.MV(d,e,f)) =
a=d andalso eqCell(b,e) andalso eqRexp(c,f)
| eqStm(T.CCMV(a,b),T.CCMV(c,d)) = eqCell(a,c) andalso eqCCexp(b,d)
| eqStm(T.FMV(a,b,c),T.FMV(d,e,f)) =
a=d andalso eqCell(b,e) andalso eqFexp(c,f)
| eqStm(T.COPY x,T.COPY y) = eqCopy(x,y)
| eqStm(T.FCOPY x,T.FCOPY y) = eqCopy(x,y)
| eqStm(T.JMP(a,b),T.JMP(a',b')) = eqRexp(a,a')
| eqStm(T.CALL{funct=a,defs=b,uses=c,...},
T.CALL{funct=d,defs=e,uses=f,...}) =
eqRexp(a,d) andalso eqMlriscs(b,e) andalso eqMlriscs(c,f)
| eqStm(T.RET _,T.RET _) = true
| eqStm(T.STORE(a,b,c,_),T.STORE(d,e,f,_)) =
a=d andalso eqRexp(b,e) andalso eqRexp(c,f)
| eqStm(T.FSTORE(a,b,c,_),T.FSTORE(d,e,f,_)) =
a=d andalso eqRexp(b,e) andalso eqFexp(c,f)
| eqStm(T.ANNOTATION(s1, _),s2) = eqStm(s1,s2)
| eqStm(s1,T.ANNOTATION(s2, _)) = eqStm(s1,s2)
| eqStm(T.PHI x,T.PHI y) = x=y
| eqStm(T.SOURCE,T.SOURCE) = true
| eqStm(T.SINK,T.SINK) = true
| eqStm(T.BCC(b,c),T.BCC(b',c')) =
eqCCexp(b,b') andalso eqLabel(c,c')
| eqStm(T.IF(b,c,d),T.IF(b',c',d')) =
eqCCexp(b,b') andalso eqStm(c,c') andalso eqStm(d,d')
| eqStm(T.RTL{attribs=x,...},T.RTL{attribs=y,...}) = x=y
| eqStm(T.REGION(a,b),T.REGION(a',b')) = eqCtrl(b,b') andalso eqStm(a,a')
| eqStm(T.EXT a,T.EXT a') = eqSext (equality()) (a,a')
| eqStm _ = false
and eqStms([],[]) = true
| eqStms(a::b,c::d) = eqStm(a,c) andalso eqStms(b,d)
| eqStms _ = false
and eqMlrisc(T.CCR a,T.CCR b) = eqCCexp(a,b)
| eqMlrisc(T.GPR a,T.GPR b) = eqRexp(a,b)
| eqMlrisc(T.FPR a,T.FPR b) = eqFexp(a,b)
| eqMlrisc _ = false
and eqMlriscs([],[]) = true
| eqMlriscs(a::b,c::d) = eqMlrisc(a,c) andalso eqMlriscs(b,d)
| eqMlriscs _ = false
and eq2((a,b,c),(d,e,f)) = a=d andalso eqRexp(b,e) andalso eqRexp(c,f)
and eqRexp(T.REG(a,b),T.REG(c,d)) = a=c andalso eqCell(b,d)
| eqRexp(T.LI a,T.LI b) = a=b
| eqRexp(T.LABEL a,T.LABEL b) = eqLabel(a,b)
| eqRexp(T.LABEXP a,T.LABEXP b) = eqRexp(a,b)
| eqRexp(T.CONST a,T.CONST b) = Constant.==(a,b)
| eqRexp(T.NEG(t,x),T.NEG(t',x')) = t = t' andalso eqRexp(x,x')
| eqRexp(T.ADD x,T.ADD y) = eq2(x,y)
| eqRexp(T.SUB x,T.SUB y) = eq2(x,y)
| eqRexp(T.MULS x,T.MULS y) = eq2(x,y)
| eqRexp(T.DIVS x,T.DIVS y) = eq2(x,y)
| eqRexp(T.QUOTS x,T.QUOTS y) = eq2(x,y)
| eqRexp(T.REMS x,T.REMS y) = eq2(x,y)
| eqRexp(T.MULU x,T.MULU y) = eq2(x,y)
| eqRexp(T.DIVU x,T.DIVU y) = eq2(x,y)
| eqRexp(T.REMU x,T.REMU y) = eq2(x,y)
| eqRexp(T.NEGT(t,x),T.NEGT(t',x')) = t = t' andalso eqRexp(x,x')
| eqRexp(T.ADDT x,T.ADDT y) = eq2(x,y)
| eqRexp(T.SUBT x,T.SUBT y) = eq2(x,y)
| eqRexp(T.MULT x,T.MULT y) = eq2(x,y)
| eqRexp(T.DIVT x,T.DIVT y) = eq2(x,y)
| eqRexp(T.QUOTT x,T.QUOTT y) = eq2(x,y)
| eqRexp(T.REMT x,T.REMT y) = eq2(x,y)
| eqRexp(T.ANDB x,T.ANDB y) = eq2(x,y)
| eqRexp(T.ORB x,T.ORB y) = eq2(x,y)
| eqRexp(T.XORB x,T.XORB y) = eq2(x,y)
| eqRexp(T.EQVB x,T.EQVB y) = eq2(x,y)
| eqRexp(T.NOTB(a,b),T.NOTB(c,d)) = a=c andalso eqRexp(b,d)
| eqRexp(T.SRA x,T.SRA y) = eq2(x,y)
| eqRexp(T.SRL x,T.SRL y) = eq2(x,y)
| eqRexp(T.SLL x,T.SLL y) = eq2(x,y)
| eqRexp(T.COND(a,b,c,d),T.COND(e,f,g,h)) =
a=e andalso eqCCexp(b,f) andalso eqRexp(c,g) andalso eqRexp(d,h)
| eqRexp(T.SX(a,b,c),T.SX(a',b',c')) =
a=a' andalso b=b' andalso eqRexp(c,c')
| eqRexp(T.ZX(a,b,c),T.ZX(a',b',c')) =
a=a' andalso b=b' andalso eqRexp(c,c')
| eqRexp(T.CVTF2I(a,b,c,d),T.CVTF2I(e,f,g,h)) =
a=e andalso b=f andalso c=g andalso eqFexp(d,h)
| eqRexp(T.LOAD(a,b,_),T.LOAD(c,d,_)) = a=c andalso eqRexp(b,d)
| eqRexp(T.LET(a,b),T.LET(c,d)) = eqStm(a,c) andalso eqRexp(b,d)
| eqRexp(T.ARG x,T.ARG y) = x = y
| eqRexp(T.PARAM x,T.PARAM y) = x = y
| eqRexp(T.???,T.???) = true
| eqRexp(T.$(t1,k1,e1),T.$(t2,k2,e2)) =
t1=t2 andalso k1=k2 andalso eqRexp(e1,e2)
| eqRexp(T.BITSLICE(t1,s1,e1),T.BITSLICE(t2,s2,e2)) =
t1=t2 andalso s1=s2 andalso eqRexp(e1,e2)
| eqRexp(T.MARK(a,_),b) = eqRexp(a,b)
| eqRexp(a,T.MARK(b,_)) = eqRexp(a,b)
| eqRexp(T.PRED(a,b),T.PRED(a',b')) = eqCtrl(b,b') andalso eqRexp(a,a')
| eqRexp(T.REXT(a,b),T.REXT(a',b')) =
a=a' andalso eqRext (equality()) (b,b')
| eqRexp _ = false
and eqRexps([],[]) = true
| eqRexps(a::b,c::d) = eqRexp(a,c) andalso eqRexps(b,d)
| eqRexps _ = false
and eq2'((a,b,c),(d,e,f)) = a=d andalso eqFexp(b,e) andalso eqFexp(c,f)
and eq1'((a,b),(d,e)) = a=d andalso eqFexp(b,e)
and eqFexp(T.FREG(t1,x),T.FREG(t2,y)) = t1=t2 andalso eqCell(x,y)
| eqFexp(T.FLOAD(a,b,_),T.FLOAD(c,d,_)) = a=c andalso eqRexp(b,d)
| eqFexp(T.FADD x,T.FADD y) = eq2'(x,y)
| eqFexp(T.FMUL x,T.FMUL y) = eq2'(x,y)
| eqFexp(T.FSUB x,T.FSUB y) = eq2'(x,y)
| eqFexp(T.FDIV x,T.FDIV y) = eq2'(x,y)
| eqFexp(T.FCOPYSIGN x, T.FCOPYSIGN y) = eq2'(x,y)
| eqFexp(T.FCOND(t,x,y,z), T.FCOND(t',x',y',z')) =
t=t' andalso eqCCexp(x,x') andalso eqFexp(y,y') andalso eqFexp(z,z')
| eqFexp(T.FABS x,T.FABS y) = eq1'(x,y)
| eqFexp(T.FNEG x,T.FNEG y) = eq1'(x,y)
| eqFexp(T.FSQRT x,T.FSQRT y) = eq1'(x,y)
| eqFexp(T.CVTI2F(a,b,c),T.CVTI2F(a',b',c')) =
a=a' andalso b=b' andalso eqRexp(c,c')
| eqFexp(T.CVTF2F(a,b,c),T.CVTF2F(a',b',c')) =
a=a' andalso b=b' andalso eqFexp(c,c')
| eqFexp(T.FEXT(a,f),T.FEXT(b,g)) = a=b andalso eqFext (equality()) (f,g)
| eqFexp(T.FMARK(a,_),b) = eqFexp(a,b)
| eqFexp(a,T.FMARK(b,_)) = eqFexp(a,b)
| eqFexp(T.FPRED(a,b),T.FPRED(a',b')) = eqCtrl(b,b') andalso eqFexp(a,a')
| eqFexp _ = false
and eqFexps([],[]) = true
| eqFexps(a::b,c::d) = eqFexp(a,c) andalso eqFexps(b,d)
| eqFexps _ = false
and eqCCexp(T.CC(c1,x),T.CC(c2,y)) = c1=c2 andalso eqCell(x,y)
| eqCCexp(T.FCC(c1,x),T.FCC(c2,y)) = c1=c2 andalso eqCell(x,y)
| eqCCexp(T.CMP(x,a,b,c),T.CMP(y,d,e,f)) =
a=d andalso eqRexp(b,e) andalso eqRexp(c,f) andalso x = y
| eqCCexp(T.FCMP(x,a,b,c),T.FCMP(y,d,e,f)) =
a=d andalso eqFexp(b,e) andalso eqFexp(c,f) andalso x = y
| eqCCexp(T.NOT x, T.NOT y) = eqCCexp(x,y)
| eqCCexp(T.AND x, T.AND y) = eqCCexp2(x,y)
| eqCCexp(T.OR x, T.OR y) = eqCCexp2(x,y)
| eqCCexp(T.XOR x, T.XOR y) = eqCCexp2(x,y)
| eqCCexp(T.EQV x, T.EQV y) = eqCCexp2(x,y)
| eqCCexp(T.CCMARK(a,_),b) = eqCCexp(a,b)
| eqCCexp(a,T.CCMARK(b,_)) = eqCCexp(a,b)
| eqCCexp(T.CCEXT(t,a),T.CCEXT(t',b)) =
t=t' andalso eqCCext (equality()) (a,b)
| eqCCexp(T.TRUE, T.TRUE) = true
| eqCCexp(T.FALSE, T.FALSE) = true
| eqCCexp _ = false
and eqCCexp2((x,y),(x',y')) = eqCCexp(x,x') andalso eqCCexp(y,y')
and eqCCexps([],[]) = true
| eqCCexps(a::b,c::d) = eqCCexp(a,c) andalso eqCCexps(b,d)
| eqCCexps _ = false
exception NonConst
fun eval{label, const} =
let fun rexp(T.LI i) = i
| rexp(T.CONST c) = const c
| rexp(T.LABEL l) = IntInf.fromInt(label l)
| rexp(T.LABEXP e) = rexp e
| rexp(T.NEG(sz,x)) = I.NEG(sz,rexp x)
| rexp(T.ADD(sz,x,y)) = I.ADD(sz,rexp x,rexp y)
| rexp(T.SUB(sz,x,y)) = I.SUB(sz,rexp x,rexp y)
| rexp(T.MULS(sz,x,y)) = I.MULS(sz,rexp x,rexp y)
| rexp(T.DIVS(sz,x,y)) = I.DIVS(sz,rexp x,rexp y)
| rexp(T.QUOTS(sz,x,y)) = I.QUOTS(sz,rexp x,rexp y)
| rexp(T.REMS(sz,x,y)) = I.REMS(sz,rexp x,rexp y)
| rexp(T.MULU(sz,x,y)) = I.MULU(sz,rexp x,rexp y)
| rexp(T.DIVU(sz,x,y)) = I.DIVU(sz,rexp x,rexp y)
| rexp(T.REMU(sz,x,y)) = I.REMU(sz,rexp x,rexp y)
| rexp(T.NEGT(sz,x)) = I.NEGT(sz,rexp x)
| rexp(T.ADDT(sz,x,y)) = I.ADDT(sz,rexp x,rexp y)
| rexp(T.SUBT(sz,x,y)) = I.SUBT(sz,rexp x,rexp y)
| rexp(T.MULT(sz,x,y)) = I.MULT(sz,rexp x,rexp y)
| rexp(T.DIVT(sz,x,y)) = I.DIVT(sz,rexp x,rexp y)
| rexp(T.QUOTT(sz,x,y)) = I.QUOTT(sz,rexp x,rexp y)
| rexp(T.REMT(sz,x,y)) = I.REMT(sz,rexp x,rexp y)
| rexp(T.NOTB(sz,x)) = I.NOTB(sz,rexp x)
| rexp(T.ANDB(sz,x,y)) = I.ANDB(sz,rexp x,rexp y)
| rexp(T.ORB(sz,x,y)) = I.ORB(sz,rexp x,rexp y)
| rexp(T.XORB(sz,x,y)) = I.XORB(sz,rexp x,rexp y)
| rexp(T.EQVB(sz,x,y)) = I.EQVB(sz,rexp x,rexp y)
| rexp(T.SLL(sz,x,y)) = I.SLL(sz,rexp x,rexp y)
| rexp(T.SRL(sz,x,y)) = I.SRL(sz,rexp x,rexp y)
| rexp(T.SRA(sz,x,y)) = I.SRA(sz,rexp x,rexp y)
| rexp(T.BITSLICE(sz,x,y)) = I.BITSLICE(sz,x,rexp y)
| rexp(T.COND(sz,cc,x,y)) = if ccexp cc then rexp x else rexp y
| rexp(T.SX(a,b,x)) = I.SX(a,b,rexp x)
| rexp(T.ZX(a,b,x)) = I.ZX(a,b,rexp x)
| rexp(T.MARK(e,_)) = rexp e
| rexp _ = raise NonConst
and ccexp(T.TRUE) = true
| ccexp(T.FALSE) = false
| ccexp(T.CMP(sz,T.EQ,x,y)) = I.EQ(sz,rexp x,rexp y)
| ccexp(T.CMP(sz,T.NE,x,y)) = I.NE(sz,rexp x,rexp y)
| ccexp(T.CMP(sz,T.GT,x,y)) = I.GT(sz,rexp x,rexp y)
| ccexp(T.CMP(sz,T.GE,x,y)) = I.GE(sz,rexp x,rexp y)
| ccexp(T.CMP(sz,T.LT,x,y)) = I.LT(sz,rexp x,rexp y)
| ccexp(T.CMP(sz,T.LE,x,y)) = I.LE(sz,rexp x,rexp y)
| ccexp(T.CMP(sz,T.GTU,x,y)) = I.GTU(sz,rexp x,rexp y)
| ccexp(T.CMP(sz,T.LTU,x,y)) = I.LTU(sz,rexp x,rexp y)
| ccexp(T.CMP(sz,T.GEU,x,y)) = I.GEU(sz,rexp x,rexp y)
| ccexp(T.CMP(sz,T.LEU,x,y)) = I.LEU(sz,rexp x,rexp y)
| ccexp(T.NOT x) = not(ccexp x)
| ccexp(T.AND(x,y)) = ccexp x andalso ccexp y
| ccexp(T.OR(x,y)) = ccexp x orelse ccexp y
| ccexp(T.XOR(x,y)) = ccexp x <> ccexp y
| ccexp(T.EQV(x,y)) = ccexp x = ccexp y
| ccexp(T.CCMARK(e,_)) = ccexp e
| ccexp _ = raise NonConst
in {rexp=rexp, ccexp=ccexp}
end
fun valueOf e =
IntInf.toInt
(#rexp(eval{const=fn c => IntInf.fromInt(Constant.valueOf c),
label=Label.addrOf}) e)
val == = eqRexp
val hash = hashRexp
val resolveConstants = MLRiscControl.getFlag "asm-resolve-constants"
val _ = resolveConstants := true
(* This module should be parameterised, in order to generate
* target label expressions for assembly code purposes.
*)
(* 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 prInt i = if i < 0 then "-"^Int.toString(~i) else Int.toString i
fun prIntInf i = if IntInf.sign i < 0 then "-"^IntInf.toString(IntInf.~ i)
else IntInf.toString i
fun toString le = toStr(le, 0)
and toStr(T.LABEL lab, _) = Label.fmt labelFmt lab
| toStr(T.LABEXP le, p) = toStr(le, p)
| toStr(T.NEG(_, T.CONST c), _) =
if !resolveConstants then prInt(~(Constant.valueOf c))
else "(-" ^ Constant.toString c ^ ")"
| toStr(T.NEG(_, T.LI i), _) = prIntInf(~i)
| toStr(T.NEG(_, lexp), prec) = parens(toStr(lexp, 3), prec, 3)
| toStr(T.CONST c, _) =
if !resolveConstants then prInt(Constant.valueOf c)
else Constant.toString c
| toStr(T.LI i, _) = prIntInf i
| toStr(T.MULS(_,lexp1, lexp2), prec) =
parens(toStr(lexp1, 2) ^ "*" ^ toStr(lexp2,2), prec, 2)
| toStr(T.DIVS(_,lexp1, lexp2), prec) =
parens(toStr(lexp1, 2) ^ "/" ^ toStr(lexp2,2), prec, 2)
| toStr(T.SLL(_,lexp, cnt), prec) =
parens(toStr(lexp,2) ^ "<<" ^ toStr(cnt,2), prec, 2)
| toStr(T.SRL(_,lexp, cnt), prec) =
parens(toStr(lexp,2) ^ ">>" ^ toStr(cnt,2), prec, 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"
end
|
