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functor SparcDelaySlots
(structure I : SPARCINSTR
structure P : INSN_PROPERTIES (* where I = I *)
where type I.addressing_mode = I.addressing_mode
and type I.ea = I.ea
and type I.instr = I.instr
and type I.instruction = I.instruction
and type I.operand = I.operand
(* sharing/defn conflict: sharing P.I = I*)
) : DELAY_SLOT_PROPERTIES =
struct
structure I = I
structure C = I.C
structure SL = CellsBasis.SortedCells
fun error msg = MLRiscErrorMsg.error("SparcDelaySlotProps",msg)
datatype delay_slot = D_NONE | D_ERROR | D_ALWAYS | D_TAKEN | D_FALLTHRU
val delaySlotSize = 4
fun delaySlot{instr, backward} =
case instr of
I.INSTR(I.CALL{nop,...}) => {n=false,nOn=D_ERROR,nOff=D_ALWAYS,nop=nop}
| I.INSTR(I.JMP{nop,...}) => {n=false,nOn=D_ERROR,nOff=D_ALWAYS,nop=nop}
| I.INSTR(I.JMPL{nop,...}) => {n=false,nOn=D_ERROR,nOff=D_ALWAYS,nop=nop}
| I.INSTR(I.RET{nop,...}) => {n=false,nOn=D_ERROR,nOff=D_ALWAYS,nop=nop}
| I.INSTR(I.Bicc{b=I.BA,a,nop,...}) => {n=false,nOn=D_NONE,nOff=D_ALWAYS,nop=nop}
| I.INSTR(I.Bicc{a,nop,...}) => {n=a,nOn=D_TAKEN,nOff=D_ALWAYS,nop=nop}
| I.INSTR(I.FBfcc{a,nop,...}) => {n=a,nOn=D_TAKEN,nOff=D_ALWAYS,nop=nop}
| I.INSTR(I.BR{a,nop,...}) => {n=a,nOn=D_TAKEN,nOff=D_ALWAYS,nop=nop}
| I.INSTR(I.BP{a,nop,...}) => {n=a,nOn=D_TAKEN,nOff=D_ALWAYS,nop=nop}
| I.INSTR(I.FCMP{nop,...}) => {n=false,nOn=D_ERROR,nOff=D_ALWAYS,nop=nop}
| I.ANNOTATION{i,...} => delaySlot{instr=i,backward=backward}
| _ => {n=false,nOn=D_ERROR,nOff=D_NONE,nop=false}
fun enableDelaySlot{instr, n, nop} =
case (instr,n) of
(I.INSTR(I.CALL{defs,uses,label,cutsTo,mem,...}),false) =>
I.call{defs=defs,uses=uses,label=label,cutsTo=cutsTo,
nop=nop,mem=mem}
| (I.INSTR(I.JMPL{r,i,d,defs,uses,mem,cutsTo,...}),false) =>
I.jmpl{r=r,i=i,d=d,defs=defs,uses=uses,cutsTo=cutsTo,
nop=nop,mem=mem}
| (I.INSTR(I.JMP{r,i,labs,...}),false) =>
I.jmp{r=r,i=i,labs=labs,nop=nop}
| (I.INSTR(I.RET{leaf,...}),false) => I.ret{leaf=leaf,nop=nop}
| (I.INSTR(I.Bicc{b,a,label,...}),_) => I.bicc{b=b,a=n,nop=nop,label=label}
| (I.INSTR(I.FBfcc{b,a,label,...}),_) => I.fbfcc{b=b,a=n,nop=nop,label=label}
| (I.INSTR(I.BR{nop,label,p,r,rcond,...}),_) =>
I.br{rcond=rcond,r=r,a=n,nop=nop,label=label,p=p}
| (I.INSTR(I.BP{nop,label,p,cc,b,...}),_) =>
I.bp{b=b,cc=cc,a=n,nop=nop,label=label,p=p}
| (I.INSTR(I.FCMP{cmp,r1,r2,...}),false) => I.fcmp{cmp=cmp,r1=r1,r2=r2,nop=nop}
| (I.ANNOTATION{i,a},n) =>
I.ANNOTATION{i=enableDelaySlot{instr=i,n=n,nop=nop},a=a}
| _ => error "enableDelaySlot"
val defUseI = P.defUse CellsBasis.GP
val defUseF = P.defUse CellsBasis.FP
val psr = [C.psr]
val fsr = [C.fsr]
val y = [C.y]
val zeroR = Option.valOf(C.zeroReg CellsBasis.GP)
val everything = [C.y,C.psr,C.fsr]
fun conflict{src=i,dst=j} =
let fun cc I.ANDCC = true
| cc I.ANDNCC = true
| cc I.ORCC = true
| cc I.ORNCC = true
| cc I.XORCC = true
| cc I.XNORCC = true
| cc I.ADDCC = true
| cc I.TADDCC = true
| cc I.TADDTVCC = true
| cc I.SUBCC = true
| cc I.TSUBCC = true
| cc I.TSUBTVCC= true
| cc I.UMULCC = true
| cc I.SMULCC = true
| cc I.UDIVCC = true
| cc I.SDIVCC = true
| cc _ = false
fun defUseOther(I.INSTR(I.Ticc _)) = ([],psr)
| defUseOther(I.INSTR(I.ARITH{a,...})) =
if cc a then (psr,[]) else ([],[])
| defUseOther(I.INSTR(I.WRY _)) = (y,[])
| defUseOther(I.INSTR(I.RDY _)) = ([],y)
| defUseOther(I.INSTR(I.FCMP _)) = (fsr,[])
| defUseOther(I.INSTR(I.Bicc{b=I.BA,...})) = ([],[])
| defUseOther(I.INSTR(I.Bicc _)) = ([],psr)
| defUseOther(I.INSTR(I.FBfcc _)) = ([],fsr)
| defUseOther(I.INSTR(I.MOVicc _)) = ([],psr)
| defUseOther(I.INSTR(I.MOVfcc _)) = ([],fsr)
| defUseOther(I.INSTR(I.FMOVicc _)) = ([],psr)
| defUseOther(I.INSTR(I.FMOVfcc _)) = ([],fsr)
| defUseOther(I.INSTR(I.CALL _)) = (everything,[])
| defUseOther(I.INSTR(I.JMPL _)) = (everything,[])
| defUseOther(I.ANNOTATION{i,...}) = defUseOther i
| defUseOther _ = ([],[])
fun clash(defUse) =
let val (di,ui) = defUse i
val (dj,uj) = defUse j
in SL.nonEmptyIntersection(di,uj) orelse
SL.nonEmptyIntersection(di,dj) orelse
SL.nonEmptyIntersection(ui,dj)
end
fun toSL f i = let val (d,u) = f i
in (SL.uniq d, SL.uniq u) end
fun defUseInt i =
let val (d,u) = defUseI i
val d = SL.uniq d
val u = SL.uniq u
(* no dependence on register 0! *)
in (SL.rmv(zeroR,d), SL.rmv(zeroR,u)) end
in clash(defUseInt) orelse
clash(toSL defUseF) orelse
clash(toSL defUseOther)
end
fun delaySlotCandidate{jmp,delaySlot=
( I.INSTR(I.CALL _) | I.INSTR(I.Bicc _) | I.INSTR(I.FBfcc _)
| I.INSTR(I.Ticc _) | I.INSTR(I.BR _) | I.INSTR(I.JMP _) | I.INSTR(I.JMPL _)
| I.INSTR(I.RET _) | I.INSTR(I.BP _) | I.INSTR(I.FCMP _))} = false
| delaySlotCandidate{jmp=I.ANNOTATION{i,...},delaySlot} =
delaySlotCandidate{jmp=i,delaySlot=delaySlot}
| delaySlotCandidate{jmp,delaySlot=I.ANNOTATION{i,...}} =
delaySlotCandidate{jmp=jmp,delaySlot=i}
| delaySlotCandidate _ = true
fun setTarget(I.INSTR(I.Bicc{b,a,nop,...}),lab) = I.bicc{b=b,a=a,nop=nop,label=lab}
| setTarget(I.INSTR(I.FBfcc{b,a,nop,...}),lab) = I.fbfcc{b=b,a=a,nop=nop,label=lab}
| setTarget(I.INSTR(I.BR{rcond,p,r,a,nop,...}),lab) =
I.br{rcond=rcond,p=p,r=r,a=a,nop=nop,label=lab}
| setTarget(I.INSTR(I.BP{b,p,cc,a,nop,...}),lab) =
I.bp{b=b,p=p,cc=cc,a=a,nop=nop,label=lab}
| setTarget(I.ANNOTATION{i,a},lab) = I.ANNOTATION{i=setTarget(i,lab),a=a}
| setTarget _ = error "setTarget"
end
|
