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|
(* sparcJumps.sml --- information to resolve jumps.
*
* COPYRIGHT (c) 1996 Bell Laboratories.
*
*)
functor SparcJumps
(structure Instr:SPARCINSTR
structure Shuffle:SPARCSHUFFLE (* where I = Instr *)
where type I.Constant.const = Instr.Constant.const
and type I.Region.region = Instr.Region.region
and type I.T.Basis.cond = Instr.T.Basis.cond
and type I.T.Basis.div_rounding_mode = Instr.T.Basis.div_rounding_mode
and type I.T.Basis.ext = Instr.T.Basis.ext
and type I.T.Basis.fcond = Instr.T.Basis.fcond
and type I.T.Basis.rounding_mode = Instr.T.Basis.rounding_mode
and type ('s,'r,'f,'c) I.T.Extension.ccx = ('s,'r,'f,'c) Instr.T.Extension.ccx
and type ('s,'r,'f,'c) I.T.Extension.fx = ('s,'r,'f,'c) Instr.T.Extension.fx
and type ('s,'r,'f,'c) I.T.Extension.rx = ('s,'r,'f,'c) Instr.T.Extension.rx
and type ('s,'r,'f,'c) I.T.Extension.sx = ('s,'r,'f,'c) Instr.T.Extension.sx
and type I.T.I.div_rounding_mode = Instr.T.I.div_rounding_mode
and type I.T.ccexp = Instr.T.ccexp
and type I.T.fexp = Instr.T.fexp
(* and type I.T.labexp = Instr.T.labexp *)
and type I.T.mlrisc = Instr.T.mlrisc
and type I.T.oper = Instr.T.oper
and type I.T.rep = Instr.T.rep
and type I.T.rexp = Instr.T.rexp
and type I.T.stm = Instr.T.stm
and type I.arith = Instr.arith
and type I.branch = Instr.branch
and type I.cc = Instr.cc
and type I.ea = Instr.ea
and type I.farith1 = Instr.farith1
and type I.farith2 = Instr.farith2
and type I.fbranch = Instr.fbranch
and type I.fcmp = Instr.fcmp
and type I.fload = Instr.fload
and type I.fsize = Instr.fsize
and type I.fstore = Instr.fstore
and type I.instr = Instr.instr
and type I.instruction = Instr.instruction
and type I.load = Instr.load
and type I.operand = Instr.operand
and type I.prediction = Instr.prediction
and type I.rcond = Instr.rcond
and type I.shift = Instr.shift
and type I.store = Instr.store
structure MLTreeEval : MLTREE_EVAL (* where T = Instr.T *)
where type T.Basis.cond = Instr.T.Basis.cond
and type T.Basis.div_rounding_mode = Instr.T.Basis.div_rounding_mode
and type T.Basis.ext = Instr.T.Basis.ext
and type T.Basis.fcond = Instr.T.Basis.fcond
and type T.Basis.rounding_mode = Instr.T.Basis.rounding_mode
and type T.Constant.const = Instr.T.Constant.const
and type ('s,'r,'f,'c) T.Extension.ccx = ('s,'r,'f,'c) Instr.T.Extension.ccx
and type ('s,'r,'f,'c) T.Extension.fx = ('s,'r,'f,'c) Instr.T.Extension.fx
and type ('s,'r,'f,'c) T.Extension.rx = ('s,'r,'f,'c) Instr.T.Extension.rx
and type ('s,'r,'f,'c) T.Extension.sx = ('s,'r,'f,'c) Instr.T.Extension.sx
and type T.I.div_rounding_mode = Instr.T.I.div_rounding_mode
and type T.Region.region = Instr.T.Region.region
and type T.ccexp = Instr.T.ccexp
and type T.fexp = Instr.T.fexp
(* and type T.labexp = Instr.T.labexp *)
and type T.mlrisc = Instr.T.mlrisc
and type T.oper = Instr.T.oper
and type T.rep = Instr.T.rep
and type T.rexp = Instr.T.rexp
and type T.stm = Instr.T.stm
) : SDI_JUMPS =
struct
structure I = Instr
structure C = Instr.C
structure Const = I.Constant
structure CB = CellsBasis
fun error msg = MLRiscErrorMsg.error("SparcJumps",msg)
val branchDelayedArch = true
fun isSdi(I.ANNOTATION{i,...}) = isSdi i
| isSdi(I.LIVE _) = true
| isSdi(I.KILL _) = true
| isSdi(I.COPY _) = true
| isSdi(I.INSTR instr) = let
fun oper(I.IMMED n) = false
| oper(I.REG _) = false
| oper(I.HI _) = false
| oper(I.LO _) = false
| oper(I.LAB _) = true
in case instr of
I.ARITH{i,...} => oper i
| I.SHIFT{i,...} => oper i
| I.LOAD{i,...} => oper i
| I.STORE{i,...} => oper i
| I.FLOAD{i,...} => oper i
| I.FSTORE{i,...} => oper i
| I.JMPL{i,...} => oper i
| I.JMP{i,...} => oper i
| I.MOVicc{i,...} => oper i
| I.MOVfcc{i,...} => oper i
| I.MOVR{i,...} => oper i
| I.CALL _ => true
| I.Bicc _ => true
| I.FBfcc _ => true
| I.BR _ => true
| I.BP _ => true
| I.Ticc{i,...} => oper i
| I.WRY{i,...} => oper i
| I.SAVE{i,...} => oper i
| I.RESTORE{i,...} => oper i
(* The following is only true of Version 8 *)
| I.FPop1{a=(I.FMOVd | I.FNEGd | I.FABSd), ...} => true
| _ => false
end
fun minSize(I.ANNOTATION{i,...}) = minSize i
| minSize(I.LIVE _) = 0
| minSize(I.KILL _) = 0
| minSize (I.COPY _) = 0 (* ? *)
| minSize(I.INSTR instr) =
(case instr
of (I.Bicc{nop=true,...}) => 8
| (I.FBfcc{nop=true,...}) => 8
| (I.JMP{nop=true,...}) => 8
| (I.JMPL{nop=true,...}) => 8
| (I.CALL{nop=true,...}) => 8
| (I.BR{nop=true,...}) => 8
| (I.BP{nop=true,...}) => 8
| (I.RET{nop=true,...}) => 8
| (I.FCMP{nop=true,...}) => 8
| (I.FPop1{a=(I.FMOVd | I.FNEGd | I.FABSd),...}) => 8
| _ => 4
(*esac*))
fun maxSize (I.INSTR(I.FPop1{a=(I.FMOVd | I.FNEGd | I.FABSd),...})) = 8
| maxSize (I.ANNOTATION{i,...}) = maxSize i
| maxSize _ = 4
fun immed13 n = ~4096 <= n andalso n < 4096
fun immed22 n = ~0x200000 <= n andalso n < 0x1fffff
fun immed16 n = ~0x8000 <= n andalso n < 0x8000
fun immed19 n = ~0x40000 <= n andalso n < 0x40000
fun immed30 n = ~0x4000000 <= n andalso n < 0x3ffffff
fun instrLength([],n) = n
| instrLength(I.INSTR(I.FPop1{a=(I.FMOVd | I.FNEGd | I.FABSd),...})::is,n) =
instrLength(is,n+8)
| instrLength(_::is,n) = instrLength(is,n+4)
fun sdiSize(I.ANNOTATION{i, ...}, labmap, loc) = sdiSize(i, labmap, loc)
| sdiSize(I.LIVE _, _, _) = 0
| sdiSize(I.KILL _, _, _) = 0
| sdiSize(I.COPY{k=CB.GP, src, dst, tmp, ...}, _, _) =
4 * length(Shuffle.shuffle{tmp=tmp, dst=dst, src=src})
| sdiSize(I.COPY{k=CB.FP, src, dst, tmp, ...}, _, _) = let
val instrs = Shuffle.shufflefp{src=src, dst=dst, tmp=tmp}
in instrLength(instrs, 0)
end
| sdiSize(instr as I.INSTR i, labMap, loc) = let
fun oper(I.IMMED n,_) = 4
| oper(I.REG _,_) = 4
| oper(I.HI _,_) = 4
| oper(I.LO _,_) = 4
| oper(I.LAB lexp,hi) = if immed13(MLTreeEval.valueOf lexp) then 4 else hi
fun displacement lab = ((labMap lab) - loc) div 4
fun branch22 lab = if immed22(displacement lab) then 4 else 16
fun branch19 lab = if immed19(displacement lab) then 4 else 16
fun branch16 lab = if immed16(displacement lab) then 4 else 16
fun call lab = if immed30(displacement lab) then 4 else 20
fun delaySlot false = 0
| delaySlot true = 4
in
case i
of I.ARITH{a=I.OR,r,i,...} =>
if CellsBasis.cellId r = 0 then oper(i,8) else oper(i,12)
| I.ARITH{i,...} => oper(i,12)
| I.SHIFT{i,...} => oper(i,12)
| I.LOAD{i,...} => oper(i,12)
| I.STORE{i,...} => oper(i,12)
| I.FLOAD{i,...} => oper(i,12)
| I.FSTORE{i,...} => oper(i,12)
| I.Ticc{i,...} => oper(i,12)
| I.SAVE{i,...} => oper(i,12)
| I.RESTORE{i,...} => oper(i,12)
| I.MOVicc{i,...} => oper(i,12)
| I.MOVfcc{i,...} => oper(i,12)
| I.MOVR{i,...} => oper(i,12)
| I.JMPL{i,nop,...} => oper(i,12) + delaySlot nop
| I.JMP{i,nop,...} => oper(i,12) + delaySlot nop
| I.Bicc{label,nop,...} => branch22 label + delaySlot nop
| I.FBfcc{label,nop,...} => branch22 label + delaySlot nop
| I.BR{label,nop,...} => branch16 label + delaySlot nop
| I.BP{label,nop,...} => branch19 label + delaySlot nop
| I.CALL{label,...} => call label
| I.WRY{i,...} => oper(i,12)
| I.FPop1{a=(I.FMOVd | I.FNEGd | I.FABSd),...} => 8
| _ => error "sdiSize"
end
| sdiSize _ = error "sdiSize"
fun split22_10 n =
let val w = Word32.fromInt n
in {hi=Word32.toInt(Word32.>>(w,0w10)),
lo=Word32.toInt(Word32.andb(w,0wx3ff))
}
end
fun split(I.LAB lexp) = split22_10(MLTreeEval.valueOf lexp)
| split _ = error "split"
(* Expand the immediate constant into two instructions *)
fun expandImm(immed,instr) =
let val {lo,hi} = split immed
in
[I.sethi{i=hi,d=C.asmTmpR},
I.arith{a=I.OR,r=C.asmTmpR,i=I.IMMED lo,d=C.asmTmpR},
I.INSTR instr
]
end
(* Expand a span dependent instruction *)
fun expand(I.ANNOTATION{i, ...}, size, pos) = expand(i, size, pos)
| expand(I.LIVE _, _, _) = []
| expand(I.KILL _, _, _) = []
| expand(I.COPY{k=CB.GP, src, tmp, dst, ...}, _, _) =
Shuffle.shuffle{src=src, dst=dst, tmp=tmp}
| expand(I.COPY{k=CB.FP, src, tmp, dst, ...}, _, _) =
Shuffle.shufflefp{src=src, dst=dst, tmp=tmp}
| expand(instr as (I.INSTR i), size, pos) =
(case (i,size)
of (_,4) => [instr]
| (I.ARITH{a=I.OR,r,i,d},8) =>
if CellsBasis.cellId r = 0 then
let val {lo,hi} = split i
in [I.sethi{i=hi,d=C.asmTmpR},
I.arith{a=I.OR,r=C.asmTmpR,i=I.IMMED lo,d=d}
]
end
else error "ARITH"
| (I.ARITH{a,r,i,d},12) =>
expandImm(i,I.ARITH{a=a,r=r,i=I.REG C.asmTmpR,d=d})
| (I.SHIFT{s,r,i,d},12) =>
expandImm(i,I.SHIFT{s=s,r=r,i=I.REG C.asmTmpR,d=d})
| (I.SAVE{r,i,d},12) =>
expandImm(i,I.SAVE{r=r,i=I.REG C.asmTmpR,d=d})
| (I.RESTORE{r,i,d},12) =>
expandImm(i,I.RESTORE{r=r,i=I.REG C.asmTmpR,d=d})
| (I.LOAD{l,r,i,d,mem},12) =>
expandImm(i,I.LOAD{l=l,r=r,i=I.REG C.asmTmpR,d=d,mem=mem})
| (I.STORE{s,r,i,d,mem},12) =>
expandImm(i,I.STORE{s=s,r=r,i=I.REG C.asmTmpR,d=d,mem=mem})
| (I.FLOAD{l,r,i,d,mem},12) =>
expandImm(i,I.FLOAD{l=l,r=r,i=I.REG C.asmTmpR,d=d,mem=mem})
| (I.FSTORE{s,r,i,d,mem},12) =>
expandImm(i,I.FSTORE{s=s,r=r,i=I.REG C.asmTmpR,d=d,mem=mem})
| (I.MOVicc{b,i,d},12) =>
expandImm(i,I.MOVicc{b=b,i=I.REG C.asmTmpR,d=d})
| (I.MOVfcc{b,i,d},12) =>
expandImm(i,I.MOVfcc{b=b,i=I.REG C.asmTmpR,d=d})
| (I.MOVR{rcond,r,i,d},12) =>
expandImm(i,I.MOVR{rcond=rcond,r=r,i=I.REG C.asmTmpR,d=d})
| (I.JMPL _,8) => [instr]
| (I.JMP _,8) => [instr]
| (I.Bicc _,8) => [instr]
| (I.FBfcc _,8) => [instr]
| (I.BR _,8) => [instr]
| (I.BP _,8) => [instr]
| (I.JMPL{r,i,d,defs,uses,cutsTo,nop,mem},(12 | 16)) =>
expandImm(i,I.JMPL{r=r,i=I.REG C.asmTmpR,d=d,defs=defs,uses=uses,
cutsTo=cutsTo,nop=nop,mem=mem})
| (I.JMP{r,i,labs,nop},(12 | 16)) =>
expandImm(i,I.JMP{r=r,i=I.REG C.asmTmpR,labs=labs,nop=nop})
| (I.Ticc{t,cc,r,i},12) =>
expandImm(i,I.Ticc{t=t,cc=cc,r=r,i=I.REG C.asmTmpR})
(*
* The sparc uses 22bits signed extended displacement offsets
* Let's hope it's enough
*)
| (I.Bicc{b,a,label,nop},_) => error "Bicc"
| (I.FBfcc{b,a,label,nop},_) => error "FBfcc"
| (I.FPop1{a, r, d}, _) => let
fun nextRegNum c = C.FPReg(CellsBasis.registerNum c + 1)
(* Note: if r=d then the move is not required.
* This needs to be factored into the size before it
* can be done here.
*)
fun doDouble(oper) =
[I.fpop1{a=oper, r=r, d=d},
I.fpop1{a=I.FMOVs, r=nextRegNum r, d=nextRegNum d}]
in
case a
of I.FMOVd => doDouble(I.FMOVs)
| I.FNEGd => doDouble(I.FNEGs)
| I.FABSd => doDouble(I.FABSs)
| _ => error "expand: FPop1"
end
| (I.WRY{r,i},12) => expandImm(i,I.WRY{r=r,i=I.REG C.asmTmpR})
| _ => error "expand"
(*esac*))
| expand _ = error "expand"
end
|
