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|
(* mipsProps.sml
*
* Modified from AlphaProps
* -- Allen
*)
functor MIPSProps(MIPSInstr:MIPSINSTR) : INSN_PROPERTIES =
struct
structure I = MIPSInstr
structure C = I.C
structure LE = I.LabelExp
exception NegateConditional
fun error msg = MLRiscErrorMsg.error ("mipsProps.",msg)
val zeroR = C.r0
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
(*========================================================================
* Instruction Kinds
*========================================================================*)
fun instrKind(I.BRANCH _) = IK_JUMP
| instrKind(I.FBRANCH _) = IK_JUMP
| instrKind(I.JR _) = IK_JUMP
| instrKind(I.J _) = IK_JUMP
| instrKind(I.COPY _) = IK_COPY
| instrKind(I.FCOPY _) = IK_COPY
| instrKind(I.JAL{cutsTo=[],...}) = IK_CALL
| instrKind(I.JAL _) = IK_CALL_WITH_CUTS
| instrKind(I.JALR{cutsTo=[],...}) = IK_CALL
| instrKind(I.JALR _) = IK_CALL_WITH_CUTS
| instrKind(I.RET _) = IK_JUMP
| instrKind(I.PHI _) = IK_PHI
| instrKind(I.SOURCE _) = IK_SOURCE
| instrKind(I.SINK _) = IK_SINK
| instrKind(I.ANNOTATION{i,...}) = instrKind i
| instrKind _ = IK_INSTR
fun moveInstr(I.COPY _) = true
| moveInstr(I.FCOPY _) = true
| moveInstr(I.ANNOTATION{i,...}) = moveInstr i
| moveInstr _ = false
val nop = fn () => I.ARITH{oper=I.ADD, rs=zeroR, i=I.Reg zeroR, rt=zeroR}
(*========================================================================
* Parallel Move
*========================================================================*)
fun moveTmpR(I.COPY{tmp=SOME(I.Direct r), ...}) = SOME r
| moveTmpR(I.FCOPY{tmp=SOME(I.FDirect f), ...}) = SOME f
| moveTmpR(I.ANNOTATION{i,...}) = moveTmpR i
| moveTmpR _ = NONE
fun moveDstSrc(I.COPY{dst, src, ...}) = (dst, src)
| moveDstSrc(I.FCOPY{dst, src, ...}) = (dst, src)
| moveDstSrc(I.ANNOTATION{i,...}) = moveDstSrc i
| moveDstSrc _ = error "moveDstSrc"
(*========================================================================
* Branches and Calls/Returns
*========================================================================*)
fun branchTargets(I.J{lab, ...}) = [LABELLED lab]
| branchTargets(I.BRANCH{lab, ...}) = [LABELLED lab, FALLTHROUGH]
| branchTargets(I.FBRANCH{lab, ...}) = [LABELLED lab, FALLTHROUGH]
| branchTargets(I.JR{labels=[],...}) = [ESCAPES]
| branchTargets(I.JR{labels,...}) = map LABELLED labels
| branchTargets(I.JAL{cutsTo, ...}) = FALLTHROUGH::map LABELLED cutsTo
| branchTargets(I.JALR{cutsTo, ...}) = FALLTHROUGH::map LABELLED cutsTo
| branchTargets(I.RET _) = [ESCAPES]
| branchTargets(I.ANNOTATION{i,...}) = branchTargets i
| branchTargets _ = error "branchTargets"
fun jump label = I.J{lab=label, nop=true}
val immedRange = {lo= ~32768, hi = 32768}
fun loadImmed{immed,t} = error "loadImmed"
fun loadOperand{opn,t} = error "loadOperand"
fun setTargets(I.ANNOTATION{i,a},labs) =
I.ANNOTATION{i=setTargets(i,labs),a=a}
| setTargets(i,_) = i
fun negateConditional br = let
in
raise NegateConditional
end
(*========================================================================
* Equality and hashing for operands
*========================================================================*)
fun hashOpn(I.Reg r) = C.hashCell r
| hashOpn(I.Imm i) = Word.fromInt i
| hashOpn(I.HiLab l) = I.LabelExp.hash l
| hashOpn(I.LoLab l) = I.LabelExp.hash l
| hashOpn(I.Lab l) = I.LabelExp.hash l
fun eqOpn(I.Reg a,I.Reg b) = C.sameColor(a,b)
| eqOpn(I.Imm a,I.Imm b) = a = b
| eqOpn(I.HiLab a,I.HiLab b) = I.LabelExp.==(a,b)
| eqOpn(I.LoLab a,I.LoLab b) = I.LabelExp.==(a,b)
| eqOpn(I.Lab a,I.Lab b) = I.LabelExp.==(a,b)
| eqOpn _ = false
(*========================================================================
* Definition and use (for register allocation mainly)
*========================================================================*)
fun defUseR instr =
let
fun opnd2(rs1, I.Reg rs2) = [rs1,rs2]
| opnd2(rs1, _) = [rs1]
in
case instr of
I.LUI{rt, ...} => ([rt], [])
(* load/store instructions *)
| I.LOAD{rt, b, ...} => ([rt], [b])
| I.STORE{rs, b, ...} => ([], [rs, b])
| I.FLOAD{b, d, ...} => ([], opnd2(b, d))
| I.FSTORE{b, d, ...} => ([], opnd2(b, d))
(* branch+call instructions *)
| I.JR{rs, ...} => ([], [rs])
| I.JAL{defs, uses, ...} => (C.linkR::C.getReg defs, C.getReg uses)
| I.JALR{rt, rs, defs, uses, ...} =>
(rt::C.getReg defs,rs::C.getReg uses)
| I.RET _ => ([], [C.linkR])
(* arithmetic *)
| I.TRAP{rs, i, ...} => ([], opnd2(rs, i))
| I.ARITH{rt, rs, i, ...} => ([rt], opnd2(rs, i))
| I.UNARY{rt, rs, ...} => ([rt], [rs])
| I.MULTIPLY{rs, rt, ...} => ([], [rs, rt])
| I.DIVIDE{rs, rt, ...} => ([], [rs, rt])
| I.MTLO rs => ([], [rs])
| I.MTHI rs => ([], [rs])
| I.MFLO rt => ([rt], [])
| I.MFHI rt => ([rt], [])
| I.FROUND{rs2, ...} => ([], [rs2])
| I.CVTI2F{rs, ...} => ([], [rs])
| I.CVTF2I{rt, ...} => ([rt], [])
(* copy *)
| I.COPY{dst, src, tmp=SOME(I.Direct r), ...} => (r::dst, src)
| I.COPY{dst, src, ...} => (dst, src)
| I.ANNOTATION{a=C.DEF_USE{cellkind=C.GP,defs,uses}, i, ...} =>
let val (d,u) = defUseR i in (defs@d, u@uses) end
| I.ANNOTATION{a, i, ...} => defUseR i
| _ => ([],[])
end
(* Use of FP registers *)
fun defUseF instr =
case instr of
I.FLOAD{ft, ...} => ([ft], [])
| I.FSTORE{fs, ...} => ([], [fs])
| I.FARITH{fs1, fs2, ft, ...} => ([ft], [fs1, fs2])
| I.FARITH3{fs1, fs2, fs3, ft, ...} => ([ft], [fs1, fs2, fs3])
| I.FUNARY{fs, ft, ...} => ([ft], [fs])
| I.FROUND{ft, fs1, ...} => ([ft], [fs1])
| I.CVTF2I{fs, ...} => ([], [fs])
| I.CVTI2F{ft, ...} => ([ft], [])
| I.FCMP{fs1, fs2, ...} => ([], [fs1, fs2])
| I.FCOPY{dst, src, tmp=SOME(I.FDirect f), ...} => (f::dst, src)
| I.FCOPY{dst, src, ...} => (dst, src)
| I.JALR{defs,uses, ...} => (C.getFreg defs,C.getFreg uses)
| I.JAL{defs,uses, ...} => (C.getFreg defs,C.getFreg uses)
| I.ANNOTATION{a=C.DEF_USE{cellkind=C.FP,defs,uses}, i, ...} =>
let val (d,u) = defUseF i in (defs@d, u@uses) end
| I.ANNOTATION{a, i, ...} => defUseF i
| _ => ([],[])
fun defUse C.GP = defUseR
| defUse C.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{tmp=SOME _, dst, src, impl}) =
I.COPY{tmp=SOME(I.Direct(C.newReg())), dst=dst, src=src, impl=ref NONE}
| replicate(I.FCOPY{tmp=SOME _, dst, src, impl}) =
I.FCOPY{tmp=SOME(I.FDirect(C.newFreg())),
dst=dst, src=src, impl=ref NONE}
| replicate i = i
end
|
