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dict: use Num.mulWrap to prevent branches

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Folkert 2024-01-28 00:40:36 +01:00
parent 01761abede
commit d4cac5cdd9
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1 changed files with 3 additions and 3 deletions
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6
crates/compiler/builtins/roc/Dict.roc
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@ -729,7 +729,7 @@ incrementDist = \distAndFingerprint ->
distAndFingerprint + distInc
incrementDistN = \distAndFingerprint, n ->
distAndFingerprint + (n * distInc)
distAndFingerprint + (Num.mulWrap n distInc)
decrementDist = \distAndFingerprint ->
distAndFingerprint - distInc
@ -837,7 +837,7 @@ removeBucketHelper = \buckets, bucketIndex ->
nextIndex = nextBucketIndex bucketIndex (List.len buckets)
nextBucket = listGetUnsafe buckets nextIndex
# shift down until either empty or an element with correct spot is found
if nextBucket.distAndFingerprint >= distInc * 2 then
if nextBucket.distAndFingerprint >= Num.mulWrap distInc 2 then
List.set buckets bucketIndex { nextBucket & distAndFingerprint: decrementDist nextBucket.distAndFingerprint }
|> removeBucketHelper nextIndex
else
@ -1417,7 +1417,7 @@ wymix = \a, b ->
wymum : U64, U64 -> { lower : U64, upper : U64 }
wymum = \a, b ->
r = Num.toU128 a * Num.toU128 b
r = Num.mulWrap (Num.toU128 a) (Num.toU128 b)
lower = Num.toU64 r
upper = Num.shiftRightZfBy r 64 |> Num.toU64