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[smlnj] View of /sml/trunk/src/MLRISC/hppa/instructions/hppaProps.sml
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View of /sml/trunk/src/MLRISC/hppa/instructions/hppaProps.sml

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Revision 1009 - (download) (annotate)
Wed Jan 9 19:44:22 2002 UTC (17 years, 9 months ago) by george
File size: 11545 byte(s)
	Removed the native COPY and FCOPY instructions
	from all the architectures and replaced it with the
	explicit COPY instruction from the previous commit.

	It is now possible to simplify many of the optimizations
	modules that manipulate copies. This has not been
	done in this change.
(* hppaProps.sml
 *
 * COPYRIGHT (c) 1996 Bell Laboratories.
 *
 *)

functor HppaProps
   ( structure HppaInstr : HPPAINSTR
     structure MLTreeEval : MLTREE_EVAL where T = HppaInstr.T
     structure MLTreeHash : MLTREE_HASH where T = HppaInstr.T
    ) : INSN_PROPERTIES = 
struct
  structure I = HppaInstr
  structure C = HppaInstr.C
  structure CB = CellsBasis

  exception NegateConditional

  fun error msg = MLRiscErrorMsg.error("HppaProps",msg)

  datatype kind = IK_JUMP | IK_NOP | IK_INSTR | IK_COPY | IK_CALL 
                | IK_CALL_WITH_CUTS | IK_PHI | IK_SOURCE | IK_SINK
  datatype target = LABELLED of Label.label | FALLTHROUGH | ESCAPES

  val zeroR = Option.valOf(C.zeroReg CB.GP)
  val r31   = C.Reg CB.GP 31

   (*========================================================================
    *  Instruction Kinds
    *========================================================================*)
  (* Note: BLE and BL used to implement calls are not view as branches *)
  fun instrKind(I.ANNOTATION{i, ...}) = instrKind i
    | instrKind(I.COPY _) = IK_COPY
    | instrKind(I.INSTR instr) = 
      (case instr
	of (I.BCOND _) => IK_JUMP
	 | (I.BCONDI _) => IK_JUMP
	 | (I.BB _)     => IK_JUMP
	 | (I.B _)      => IK_JUMP
	 | (I.BE _)     => IK_JUMP
	 | (I.FBRANCH _)=> IK_JUMP
	 | (I.BV _)     => IK_JUMP
	 | (I.BLR _)    => IK_JUMP
	 | (I.NOP)      => IK_NOP
	 | (I.BL{cutsTo=_::_,...}) => IK_CALL_WITH_CUTS
	 | (I.BL  _)    => IK_CALL
	 | (I.BLE{cutsTo=_::_,...}) => IK_CALL_WITH_CUTS
	 | (I.BLE _)    => IK_CALL
	 | (I.PHI _)    => IK_PHI
	 | (I.SOURCE _) => IK_SOURCE
	 | (I.SINK _)   => IK_SINK
	 |  _	       => IK_INSTR)
    | instrKind _ = error "instrKind"

  fun moveInstr(I.COPY _) 	     = true
    | moveInstr(I.ANNOTATION{i,...}) = moveInstr i
    | moveInstr _ = false

  fun nop() = I.nop

   (*========================================================================
    *  Parallel Move
    *========================================================================*)
  fun moveTmpR(I.COPY{tmp, ...}) = 
      (case tmp
	of SOME(I.Direct r) => SOME r
	 | SOME(I.FDirect f) => SOME f
	 | _ => NONE
      (*esac*))
    | moveTmpR(I.ANNOTATION{i,...}) = moveTmpR i
    | moveTmpR _ = NONE

  fun moveDstSrc(I.COPY{dst, src, ...}) = (dst, src)
    | moveDstSrc(I.ANNOTATION{i,...}) = moveDstSrc i
    | moveDstSrc _ = error "moveDstSrc"

   (*========================================================================
    *  Branches and Calls/Returns
    *========================================================================*)
  fun branchTargets(I.ANNOTATION{i,...}) = branchTargets i
    | branchTargets(I.INSTR instr) = 
      (case instr
       of (I.BCOND{t, ...})    => [LABELLED t, FALLTHROUGH]
	| (I.BCONDI{t, ...})   => [LABELLED t, FALLTHROUGH]
	| (I.BB{t, ...})       => [LABELLED t, FALLTHROUGH]
	| (I.B{lab, ...})      => [LABELLED lab]
	| (I.FBRANCH{t,...})   => [LABELLED t, FALLTHROUGH]
	| (I.BE{labs=[],...})  => [ESCAPES]
	| (I.BE{labs,...})     => map LABELLED labs
	| (I.BV{labs=[],...})  => [ESCAPES]
	| (I.BV{labs,...})     => map LABELLED labs
	| (I.BLR{labs,...})    => map LABELLED labs
	| (I.BL{cutsTo,...})   => FALLTHROUGH::map LABELLED cutsTo
	| (I.BLE{cutsTo,...})  => FALLTHROUGH::map LABELLED cutsTo
	| _ => error "branchTargets"
      (*easc*))
    | branchTargets  _ = error "branchTargets"

  fun jump label = I.b{lab=label,n=true}

  val immedRange = {lo= ~8192, hi=8191}
  fun loadImmed{immed,t} = 
      I.ldo{i=if #lo immedRange <= immed andalso immed <= #hi immedRange 
              then I.IMMED immed
              else I.LabExp(I.T.LI(I.T.I.fromInt(32,immed)),I.F),b=zeroR,t=t}
  fun loadOperand{opn,t} = I.ldo{i=opn,b=zeroR,t=t}

  fun setTargets(I.INSTR(I.BCOND{cmp,bc,r1,r2,t,f,n,nop}), [F,T]) =
          I.bcond{cmp=cmp,bc=bc,r1=r1,r2=r2,t=T,f=F,n=n,nop=nop}
    | setTargets(I.INSTR(I.BCONDI{cmpi,bc,i,r2,t,f,n,nop=nop}), [F,T]) =
          I.bcondi{cmpi=cmpi,bc=bc,i=i,r2=r2,t=T,f=F,n=n,nop=nop}
    | setTargets(I.INSTR(I.BB{bc,r,p,t,f,n,nop}), [F,T]) =
          I.bb{bc=bc,r=r,p=p,t=T,f=F,n=n,nop=nop}
    | setTargets(I.INSTR(I.B{n,...}), [L]) = I.b{lab=L,n=n}
    | setTargets(I.INSTR(I.FBRANCH{cc,fmt,n,long,f1,f2,...}), [F,T]) =
          I.fbranch{cc=cc,fmt=fmt,t=T,f=F,n=n,long=long,f1=f1,f2=f2} 
    | setTargets(I.INSTR(I.BV{x,b,n,...}),labels) = I.bv{x=x,b=b,labs=labels,n=n}
    | setTargets(I.INSTR(I.BE{b,d,n,sr,...}),labs) = I.be{b=b,d=d,n=n,sr=sr,labs=labs}
    | setTargets(I.INSTR(I.BLR{x,t,n,...}),labels) = I.blr{x=x,t=t,labs=labels,n=n}
    | setTargets(I.ANNOTATION{i,a},labels) =
          I.ANNOTATION{i=setTargets(i,labels),a=a}
    | setTargets(i,_) = i

  fun negateConditional br = let
    fun revFcond I.?    = I.!?
      | revFcond I.!<=> = I.<=>
      | revFcond I.==   = I.!=
      | revFcond I.?=   = I.!?=
      | revFcond I.!<>  = I.<>
      | revFcond I.!?>= = I.?>=
      | revFcond I.<    = I.!<
      | revFcond I.?<   = I.!?<
      | revFcond I.!>=  = I.>=
      | revFcond I.!?>  = I.?>
      | revFcond I.<=   = I.!<=
      | revFcond I.?<=  = I.!?<=
      | revFcond I.!>   = I.>
      | revFcond I.!?<= = I.?<=
      | revFcond I.>    = I.!>
      | revFcond I.?>   = I.!?>
      | revFcond I.!<=  = I.<=
      | revFcond I.!?<  = I.?<
      | revFcond I.>=   = I.!>=
      | revFcond I.?>=  = I.!?>=
      | revFcond I.!<   = I.<
      | revFcond I.!?=  = I.?=
      | revFcond I.<>   = I.!<>
      | revFcond I.!=   = I.==
      | revFcond I.!?   = I.?
      | revFcond I.<=>  = I.!<=>
      | revFcond _      = error "revFcond"
  in
    case br of 
      I.INSTR(I.BCOND{cmp,bc,r1,r2,t,f,n,nop}) => 
         I.bcond{bc=bc, r1=r1, r2=r2, t=t, f=f, n=n, nop=nop,
		 cmp=case cmp of I.COMBT => I.COMBF | I.COMBF => I.COMBT}
    | I.INSTR(I.BCONDI{cmpi,bc,i,r2,t,f,n,nop}) =>
        I.bcondi{bc=bc, i=i, r2=r2, t=t, f=f, n=n, nop=nop,
		 cmpi=case cmpi of I.COMIBT => I.COMIBF | I.COMIBF => I.COMIBT}
    | I.INSTR(I.BB{bc,r,p,t,f,n,nop}) => 
         I.bb{bc=case bc of I.BSET => I.BCLR | I.BCLR => I.BSET, 
              r=r,p=p,t=t,f=f,n=n,nop=nop}
    | I.INSTR(I.FBRANCH{cc,fmt,f1,f2,t,f,n,long}) =>
        I.fbranch{cc=revFcond cc,fmt=fmt,f1=f1,f2=f2,t=t,f=f,n=n,long=long} 
    | I.ANNOTATION{i,a} => I.ANNOTATION{i=negateConditional i,a=a}
    | _ => raise NegateConditional
  end

  (*========================================================================
   *  Equality and hashing for operands
   *========================================================================*)
   fun hashFieldSel I.F = 0w0
     | hashFieldSel I.S = 0w1
     | hashFieldSel I.D = 0w2
     | hashFieldSel I.R = 0w3
     | hashFieldSel I.T = 0w4
     | hashFieldSel I.P = 0w5
   fun hashOpn(I.IMMED i) = Word.fromInt i
     | hashOpn(I.LabExp(l,f)) = MLTreeHash.hash l + hashFieldSel f
     | hashOpn(I.HILabExp(l,f)) = MLTreeHash.hash l + hashFieldSel f + 0w10000
     | hashOpn(I.LOLabExp(l,f)) = MLTreeHash.hash l + hashFieldSel f + 0w20000
     | hashOpn(I.REG r) = CB.hashCell r
   fun eqOpn(I.IMMED i,I.IMMED j) = i = j
     | eqOpn(I.REG x,I.REG y) = CB.sameColor(x,y)
     | eqOpn(I.LabExp(a,b),I.LabExp(c,d)) = 
          b = d andalso MLTreeEval.==(a,c)
     | eqOpn(I.HILabExp(a,b),I.HILabExp(c,d)) = 
          b = d andalso MLTreeEval.==(a,c)
     | eqOpn(I.LOLabExp(a,b),I.LOLabExp(c,d)) = 
          b = d andalso MLTreeEval.==(a,c)
     | eqOpn _ = false
   

  (*========================================================================
   *  Definition and use (for register allocation mainly)
   *========================================================================*)
  fun defUseR instr = let
    fun hppaDU instr = let
      fun trap((I.ADDO | I.SUBO | I.SH1ADDO), d, u) = (d, u)
	| trap(_, d, u) = (d, u)
      fun trapi((I.ADDIO | I.SUBIO), d, u) = (d, u)
	| trapi(_, d, u) = (d, u)
    in
      case instr
       of I.STORE {b, r,...}          => ([],  [b,r])
	| I.LOAD {l, r1, r2, t, ...}  => ([t], [r1,r2])
	| I.LOADI {li, r, t, ...}     => ([t], [r])
	| I.ARITH {a, r1, r2, t, ...} => trap(a, [t], [r1,r2])
	| I.ARITHI {ai, r, t, ...}    => trapi(ai, [t], [r])
	| I.COMCLR_LDO{r1, r2, b, t1, t2, ...}=> 
	    if CB.sameColor(t1,t2) then ([t1], [b, r1, r2])
	    else ([t1, t2], [b, r1, r2, t2])
	| I.COMICLR_LDO{i1, r2, b, t1, t2, ...}=> 
	    if CB.sameColor(t1,t2) then ([t1], [b, r2])
	    else ([t1, t2], [b, r2, t2])
	| I.SHIFTV {r, t, ...}        => ([t], [r])
	| I.SHIFT {r, t, ...}         => ([t], [r])
	| I.BCOND {r1, r2, ...}       => ([],  [r1,r2])
	| I.BCONDI {r2, ...} 	    => ([],  [r2])
	| I.BB {r, ...} 	            => ([],  [r])
	| I.BV {x, b, ...}	    => ([],  [x,b])
	| I.BE {b, ...}	            => ([],  [b])
	| I.BLR{x, t, ...}            => ([t], [x])
	| I.BL{defs, uses, ...}       => (C.getReg defs, C.getReg uses)
	| I.BLE{t, b, defs, uses, ...}=>
	      (r31 :: t :: C.getReg defs, b :: C.getReg uses)
	| I.LDIL{i, t}		    => ([t], [])
	| I.LDO{b, t, ...}	    => ([t], [b])
	| I.MTCTL{r, t}		    => ([],  [r])
	| I.FSTORE {b, ...}	    => ([],  [b])
	| I.FSTOREX {b, x, ...}  	    => ([],  [b,x])
	| I.FLOAD {b, ...}	    => ([],  [b])
	| I.FLOADX{b, x, ...} 	    => ([],  [b,x])
	| _   => ([],[])
    end
  in
      case instr
       of I.ANNOTATION{i, ...} => defUseR i
	| I.LIVE{regs, ...} => ([], C.getReg regs)
	| I.KILL{regs, ...} => (C.getReg regs, [])
	| I.INSTR(i) => hppaDU(i)
	| I.COPY{k, dst, src, tmp, ...} => let
	    val (d,u) = case k of CB.GP => (dst, src) | _ => ([], [])
          in
	      case tmp 
	      of SOME(I.Direct r) => (r::d, u)
	       | SOME(I.Displace{base, ...}) => (* (d, base::u) *) (d, u)
	       | _ => (d,u)
          end
  end

  fun defUseF instr = let
    fun hppaDU instr = 
      case instr
	of I.FSTORE {r, ...}  	   => ([],  [r])
	 | I.FSTOREX{r, ...}	   => ([],  [r])
	 | I.FLOAD{t, ...}	   => ([t], [])
	 | I.FLOADX{t, ...}	   => ([t], [])
	 | I.FARITH {r1, r2, t, ...} => ([t], [r1,r2])
	 | I.FUNARY {f, t, ...}      => ([t], [f])
	 | I.FCNV {f, t, ...}        => ([t], [f])
	 | I.FBRANCH{f1, f2,...}	   => ([],  [f1, f2])
	 | I.BL{defs, uses, ...}     => (C.getFreg defs, C.getFreg uses)
	 | I.BLE{defs, uses, ...}    => (C.getFreg defs, C.getFreg uses)
	 | _ => ([],[])
  in 
      case instr
       of I.ANNOTATION{i, ...} => defUseF i
	| I.INSTR(i) => hppaDU(i)
	| I.LIVE{regs, ...} => ([], C.getFreg regs)
	| I.KILL{regs, ...} => (C.getFreg regs, [])
        | I.COPY{k, dst, src, tmp, ...} => let
	    val (d, u) = case k of CB.FP => (dst, src) | _ => ([],[])
          in
	     case tmp
	      of SOME(I.FDirect f) => (f::d, u)
	       | _ => (d, u)
          end
  end

  fun defUse CB.GP = defUseR
    | defUse CB.FP = defUseF
    | defUse _ = error "defUse"

  (*========================================================================
   *  Annotations 
   *========================================================================*)
  fun getAnnotations(I.ANNOTATION{i,a}) = 
       let val (i,an) = getAnnotations i in (i,a::an) end
    | getAnnotations i = (i,[])
  fun annotate(i,a) = I.ANNOTATION{i=i,a=a}

  (*========================================================================
   *  Replicate an instruction
   *========================================================================*)
  fun replicate(I.ANNOTATION{i,a}) = I.ANNOTATION{i=replicate i,a=a}
    | replicate(I.COPY{k, sz, tmp=SOME _, dst, src}) =  let
	  val tmp = case k of CB.GP => C.newReg() | CB.FP => C.newFreg()
      in
        I.COPY{k=k, sz=sz, tmp=SOME(I.Direct(tmp)), dst=dst, src=src}
      end
    | replicate i = i
end




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