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Commit ad80ecfc authored by Nikita Zyuzin's avatar Nikita Zyuzin
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Rearrange validErrorboundAA body; 

Comment the check for already visited expressions
parent a7ec017f
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Showing with 150 additions and 148 deletions
coq/ErrorValidationAA.v
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......@@ -22,93 +22,153 @@ Fixpoint validErrorboundAA (e:expr Q) (* analyzed expression *)
(dVars:NatSet.t) (* let-bound variables encountered previously *)
(currNoise: nat) (* current maximal noise term *)
(errMap:FloverMap.t (affine_form Q)) (* previously seen affine polys *)
:option (FloverMap.t (affine_form Q) * nat) :=
olet m := FloverMap.find e typeMap in
olet dRes := FloverMap.find e A in
let (intv, err) := dRes in
(* Error bounds are intervals symmetric at 0 --> the bound must be positive here *)
if (negb (Qleb 0 err))
then None
else
(* We have already checked a subexpression *)
if (FloverMap.mem e errMap)
then Some (errMap, currNoise)
: option (FloverMap.t (affine_form Q) * nat) :=
(* (* case analysis for the expression *) *)
(* if (FloverMap.mem e errMap) then *)
(* (* We have already checked a subexpression *) *)
(* Some (errMap, currNoise) *)
(* else *)
olet m := FloverMap.find e typeMap in
olet dRes := FloverMap.find e A in
let (intv, err) := dRes in
(* Error bounds are intervals symmetric at 0 --> the bound must be positive here *)
if (negb (Qleb 0 err))
then None
else
(* case analysis for the expression *)
match e with
| Var _ x =>
match e with
| Var _ x =>
if (NatSet.mem x dVars)
then Some (errMap, currNoise) (* previously checked defined variable *)
else
(* Build an affine polynomial *)
let errNew := computeErrorQ (maxAbs intv) m in
let af := fromIntv (mkIntv (-errNew) errNew) currNoise in
if (Qleb errNew err)
then Some (FloverMap.add e af errMap, (currNoise+1)%nat)
else None
| Expressions.Const m v =>
(* Build an affine polynomial *)
let errNew := computeErrorQ (maxAbs intv) m in
let af := fromIntv (mkIntv (-errNew) errNew) currNoise in
if (Qleb errNew err)
then Some (FloverMap.add e af errMap, (currNoise+1)%nat)
else None
| Expressions.Const m v =>
let errNew := computeErrorQ (maxAbs intv) m in
let af := fromIntv (mkIntv (-errNew) errNew) currNoise in
if (Qleb errNew err)
then Some (FloverMap.add (elt:=affine_form Q) e af errMap, (currNoise+1)%nat)
else None
| Unop Neg e1 =>
| Unop Neg e1 =>
olet res := validErrorboundAA e1 typeMap A dVars currNoise errMap in
let (newErrorMap, maxNoise) := res in
olet afPolye1 := FloverMap.find e1 newErrorMap in
match FloverMap.find e1 A with
| Some (iv_e1, err1) =>
if (Qeq_bool err err1)
then Some (FloverMap.add e afPolye1 newErrorMap, maxNoise)
else None
| None => None
end
| Unop Inv e1 => None
| Binop b e1 e2 =>
olet res1 := validErrorboundAA e1 typeMap A dVars currNoise errMap in
let (newErrorMap1, maxNoise1) := res1 in
olet res2 := validErrorboundAA e2 typeMap A dVars maxNoise1 newErrorMap1 in
let (newErrorMap2, maxNoise2) := res2 in
(* Error polynomial for e1 *)
olet afPolye1 := FloverMap.find e1 newErrorMap2 in
(* Error polynomial for e2 *)
olet afPolye2 := FloverMap.find e2 newErrorMap2 in
(* Analysis results for e1, e2 *)
match FloverMap.find e1 A, FloverMap.find e2 A with
| None, _ => None
| _, None => None
| Some (ive1, err1), Some (ive2, err2) =>
let errIve1 := widenIntv ive1 err1 in
let errIve2 := widenIntv ive2 err2 in
match b with
| Plus =>
let actualRange := (addIntv errIve1 errIve2) in
let errNew := computeErrorQ (maxAbs actualRange) m in
let errPoly := plus_aff
(plus_aff afPolye1 afPolye2)
(fromIntv (mkIntv (-errNew) errNew) maxNoise2) in
let errVal := maxAbs (toIntv errPoly) in
if (Qleb errVal err)
then Some (FloverMap.add e errPoly newErrorMap2, (maxNoise2 + 1)%nat)
else None
| Sub =>
let mAbs := (maxAbs (subtractIntv errIve1 errIve2)) in
let errNew := computeErrorQ mAbs m in
let errPoly := plus_aff
(subtract_aff afPolye1 afPolye2)
(fromIntv (mkIntv (-errNew) errNew) maxNoise2) in
let errVal := maxAbs (toIntv errPoly) in
if (Qleb errVal err)
then Some (FloverMap.add e errPoly newErrorMap2, (maxNoise2 + 1)%nat)
let (newErrorMap, maxNoise) := res in
olet afPolye1 := FloverMap.find e1 newErrorMap in
match FloverMap.find e1 A with
| Some (iv_e1, err1) =>
if (Qeq_bool err err1)
then Some (FloverMap.add e afPolye1 newErrorMap, maxNoise)
else None
| Mult =>
| None => None
end
| Unop Inv e1 => None
| Binop b e1 e2 =>
olet res1 := validErrorboundAA e1 typeMap A dVars currNoise errMap in
let (newErrorMap1, maxNoise1) := res1 in
olet res2 := validErrorboundAA e2 typeMap A dVars maxNoise1 newErrorMap1 in
let (newErrorMap2, maxNoise2) := res2 in
(* Error polynomial for e1 *)
olet afPolye1 := FloverMap.find e1 newErrorMap2 in
(* Error polynomial for e2 *)
olet afPolye2 := FloverMap.find e2 newErrorMap2 in
(* Analysis results for e1, e2 *)
match FloverMap.find e1 A, FloverMap.find e2 A with
| None, _ => None
| _, None => None
| Some (ive1, err1), Some (ive2, err2) =>
let errIve1 := widenIntv ive1 err1 in
let errIve2 := widenIntv ive2 err2 in
match b with
| Plus =>
let actualRange := (addIntv errIve1 errIve2) in
let errNew := computeErrorQ (maxAbs actualRange) m in
let errPoly := plus_aff
(plus_aff afPolye1 afPolye2)
(fromIntv (mkIntv (-errNew) errNew) maxNoise2) in
let errVal := maxAbs (toIntv errPoly) in
if (Qleb errVal err)
then Some (FloverMap.add e errPoly newErrorMap2, (maxNoise2 + 1)%nat)
else None
| Sub =>
let mAbs := (maxAbs (subtractIntv errIve1 errIve2)) in
let errNew := computeErrorQ mAbs m in
let errPoly := plus_aff
(subtract_aff afPolye1 afPolye2)
(fromIntv (mkIntv (-errNew) errNew) maxNoise2) in
let errVal := maxAbs (toIntv errPoly) in
if (Qleb errVal err)
then Some (FloverMap.add e errPoly newErrorMap2, (maxNoise2 + 1)%nat)
else None
| Mult =>
let aaRangee1 := fromIntv ive1 maxNoise2 in
let aaRangee2 := fromIntv ive2 (maxNoise2 + 1) in
let propError := plus_aff
(plus_aff (mult_aff aaRangee1 afPolye2 (maxNoise2 + 2))
(mult_aff aaRangee2 afPolye1 (maxNoise2 + 3) ))
(mult_aff afPolye1 afPolye2 (maxNoise2 + 4)) in
let mAbs := (maxAbs (multIntv errIve1 errIve2)) in
let errNew := computeErrorQ mAbs m in
let errPoly := plus_aff propError
(fromIntv (mkIntv (-errNew) errNew) (maxNoise2 + 5)) in
let errVal := maxAbs (toIntv errPoly) in
if (Qleb errVal err)
then Some (FloverMap.add e errPoly newErrorMap2, (maxNoise2 + 6)%nat)
else None
| Div =>
if (((Qleb (ivhi errIve2) 0) && (negb (Qeq_bool (ivhi errIve2) 0))) ||
((Qleb 0 (ivlo errIve2)) && (negb (Qeq_bool (ivlo errIve2) 0))))
then
let aaRangee1 := fromIntv ive1 maxNoise2 in
let invertede2 := invertIntv ive2 in
let aaRangeInve2 := fromIntv invertede2 (maxNoise2 + 1) in
let invertedErre2 := inverse_aff afPolye2 (maxNoise2 + 2) (* TODO invert *) in
let propError := plus_aff
(plus_aff (mult_aff aaRangee1 invertedErre2 (maxNoise2 + 3))
(mult_aff aaRangeInve2 afPolye1 (maxNoise2 + 4)))
(mult_aff afPolye1 invertedErre2 (maxNoise2 + 5)) in
let mAbs := (maxAbs (divideIntv errIve1 errIve2)) in
let errNew := computeErrorQ mAbs m in
let errPoly := plus_aff propError
(fromIntv (mkIntv (-errNew) errNew) (maxNoise2 + 6)) in
let errVal := maxAbs (toIntv errPoly) in
if (Qleb errVal err)
then Some (FloverMap.add e errPoly newErrorMap2, (maxNoise2 + 7)%nat)
else None
else None
end
end
| Fma e1 e2 e3 =>
olet res1 := validErrorboundAA e1 typeMap A dVars currNoise errMap in
let (newErrorMap1, maxNoise1) := res1 in
olet res2 := validErrorboundAA e2 typeMap A dVars maxNoise1 newErrorMap1 in
let (newErrorMap2, maxNoise2) := res2 in
olet res3 := validErrorboundAA e3 typeMap A dVars maxNoise2 newErrorMap2 in
let (newErrorMap3, maxNoise3) := res3 in
(* Error polynomial for e1 *)
olet afPolye1 := FloverMap.find e1 newErrorMap3 in
(* Error polynomial for e2 *)
olet afPolye2 := FloverMap.find e2 newErrorMap3 in
(* Error polynomial for e2 *)
olet afPolye3 := FloverMap.find e3 newErrorMap3 in
match FloverMap.find e1 A, FloverMap.find e2 A, FloverMap.find e3 A with
| None, _, _ => None
| _, None, _ => None
| _, _, None => None
| Some (ive1, err1), Some (ive2, err2), Some (ive3, err3) =>
let errIve1 := widenIntv ive1 err1 in
let errIve2 := widenIntv ive2 err2 in
let errIve3 := widenIntv ive3 err3 in
let aaRangee1 := fromIntv ive1 maxNoise2 in
let aaRangee2 := fromIntv ive2 (maxNoise2 + 1) in
let propError := plus_aff
(plus_aff (mult_aff aaRangee1 afPolye2 (maxNoise2 + 2))
(mult_aff aaRangee2 afPolye1 (maxNoise2 + 3) ))
(mult_aff afPolye1 afPolye2 (maxNoise2 + 4)) in
let mAbs := (maxAbs (multIntv errIve1 errIve2)) in
(plus_aff
(plus_aff (mult_aff aaRangee1 afPolye2 (maxNoise2 + 2))
(mult_aff aaRangee2 afPolye1 (maxNoise2 + 3) ))
(mult_aff afPolye1 afPolye2 (maxNoise2 + 4)))
afPolye3 in
let mAbs := (maxAbs (addIntv (multIntv errIve1 errIve2) errIve3)) in
let errNew := computeErrorQ mAbs m in
let errPoly := plus_aff propError
(fromIntv (mkIntv (-errNew) errNew) (maxNoise2 + 5)) in
......@@ -116,84 +176,24 @@ Fixpoint validErrorboundAA (e:expr Q) (* analyzed expression *)
if (Qleb errVal err)
then Some (FloverMap.add e errPoly newErrorMap2, (maxNoise2 + 6)%nat)
else None
| Div =>
if (((Qleb (ivhi errIve2) 0) && (negb (Qeq_bool (ivhi errIve2) 0))) ||
((Qleb 0 (ivlo errIve2)) && (negb (Qeq_bool (ivlo errIve2) 0))))
then
let aaRangee1 := fromIntv ive1 maxNoise2 in
let invertede2 := invertIntv ive2 in
let aaRangeInve2 := fromIntv invertede2 (maxNoise2 + 1) in
let invertedErre2 := inverse_aff afPolye2 (maxNoise2 + 2) (* TODO invert *) in
let propError := plus_aff
(plus_aff (mult_aff aaRangee1 invertedErre2 (maxNoise2 + 3))
(mult_aff aaRangeInve2 afPolye1 (maxNoise2 + 4)))
(mult_aff afPolye1 invertedErre2 (maxNoise2 + 5)) in
let mAbs := (maxAbs (divideIntv errIve1 errIve2)) in
let errNew := computeErrorQ mAbs m in
let errPoly := plus_aff propError
(fromIntv (mkIntv (-errNew) errNew) (maxNoise2 + 6)) in
let errVal := maxAbs (toIntv errPoly) in
if (Qleb errVal err)
then Some (FloverMap.add e errPoly newErrorMap2, (maxNoise2 + 7)%nat)
else None
else None
end
end
| Fma e1 e2 e3 =>
end
| Downcast m e1 =>
olet res1 := validErrorboundAA e1 typeMap A dVars currNoise errMap in
let (newErrorMap1, maxNoise1) := res1 in
olet res2 := validErrorboundAA e2 typeMap A dVars maxNoise1 newErrorMap1 in
let (newErrorMap2, maxNoise2) := res2 in
olet res3 := validErrorboundAA e3 typeMap A dVars maxNoise2 newErrorMap2 in
let (newErrorMap3, maxNoise3) := res3 in
(* Error polynomial for e1 *)
olet afPolye1 := FloverMap.find e1 newErrorMap3 in
(* Error polynomial for e2 *)
olet afPolye2 := FloverMap.find e2 newErrorMap3 in
(* Error polynomial for e2 *)
olet afPolye3 := FloverMap.find e3 newErrorMap3 in
match FloverMap.find e1 A, FloverMap.find e2 A, FloverMap.find e3 A with
| None, _, _ => None
| _, None, _ => None
| _, _, None => None
| Some (ive1, err1), Some (ive2, err2), Some (ive3, err3) =>
let errIve1 := widenIntv ive1 err1 in
let errIve2 := widenIntv ive2 err2 in
let errIve3 := widenIntv ive3 err3 in
let aaRangee1 := fromIntv ive1 maxNoise2 in
let aaRangee2 := fromIntv ive2 (maxNoise2 + 1) in
let propError := plus_aff
(plus_aff
(plus_aff (mult_aff aaRangee1 afPolye2 (maxNoise2 + 2))
(mult_aff aaRangee2 afPolye1 (maxNoise2 + 3) ))
(mult_aff afPolye1 afPolye2 (maxNoise2 + 4)))
afPolye3 in
let mAbs := (maxAbs (addIntv (multIntv errIve1 errIve2) errIve3)) in
let errNew := computeErrorQ mAbs m in
let errPoly := plus_aff propError
(fromIntv (mkIntv (-errNew) errNew) (maxNoise2 + 5)) in
let (newErrorMap1, maxNoise1) := res1 in
(* Error polynomial for e1 *)
olet afPolye1 := FloverMap.find e1 newErrorMap1 in
olet aRes := FloverMap.find e1 A in
let (ive1, err1) := aRes in
let errIve1 := widenIntv ive1 err1 in
let mAbs := maxAbs errIve1 in
let newErr := computeErrorQ mAbs m in
let errPoly := plus_aff afPolye1
(fromIntv (mkIntv (-newErr) newErr) maxNoise1) in
let errVal := maxAbs (toIntv errPoly) in
if (Qleb errVal err)
then Some (FloverMap.add e errPoly newErrorMap2, (maxNoise2 + 6)%nat)
then Some (FloverMap.add e errPoly newErrorMap1, (maxNoise1 + 1)%nat)
else None
end
| Downcast m e1 =>
olet res1 := validErrorboundAA e1 typeMap A dVars currNoise errMap in
let (newErrorMap1, maxNoise1) := res1 in
(* Error polynomial for e1 *)
olet afPolye1 := FloverMap.find e1 newErrorMap1 in
olet aRes := FloverMap.find e1 A in
let (ive1, err1) := aRes in
let errIve1 := widenIntv ive1 err1 in
let mAbs := maxAbs errIve1 in
let newErr := computeErrorQ mAbs m in
let errPoly := plus_aff afPolye1
(fromIntv (mkIntv (-newErr) newErr) maxNoise1) in
let errVal := maxAbs (toIntv errPoly) in
if (Qleb errVal err)
then Some (FloverMap.add e errPoly newErrorMap1, (maxNoise1 + 1)%nat)
else None
end.
end.
(** Error bound command validator **)
Fixpoint validErrorboundAACmd (f:cmd Q) (* analyzed cmd with let's *)
......@@ -202,7 +202,7 @@ Fixpoint validErrorboundAACmd (f:cmd Q) (* analyzed cmd with let's *)
(dVars:NatSet.t) (* let-bound variables encountered previously *)
(currNoise: nat) (* current maximal noise term *)
(errMap:FloverMap.t (affine_form Q)) (* previously seen affine polys *)
:option (FloverMap.t (affine_form Q) * nat) :=
: option (FloverMap.t (affine_form Q) * nat) :=
match f with
|Let m x e g =>
olet res1 := validErrorboundAA e typeMap A dVars currNoise errMap in
......@@ -231,6 +231,8 @@ Fixpoint validErrorboundAACmd (f:cmd Q) (* analyzed cmd with let's *)
(* let mAbs := maxAbs (toIntv af) in *)
(* (Rabs (vR - vF) <= (Q2R mAbs))%R. *)
(* Theorem validErrorboundAA_sound e: *)
(* forall E1 E2 P Gamma defVars nR A elo ehi tMap fVars dVars currNoise maxNoise initMap resMap M1, *)
(* (forall e vR, *)
......
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