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| author | Sylvain Henry <sylvain@haskus.fr> | 2021-06-22 10:47:29 +0200 |
|---|---|---|
| committer | Marge Bot <ben+marge-bot@smart-cactus.org> | 2021-07-19 19:36:37 -0400 |
| commit | e5a4cfa51899e67db8fb17409660107b821d252d (patch) | |
| tree | dde5c2e380b53bd8d41432943881a7f0bdddcc91 | |
| parent | 5b187575dac64e0a202f0700bdb7a1d1604f9438 (diff) | |
| download | haskell-e5a4cfa51899e67db8fb17409660107b821d252d.tar.gz | |
Bignum: don't allocate in bignat_mul (#20028)
We allocated the recursively entered `mul` helper function because it
captures some args.
| -rw-r--r-- | libraries/ghc-bignum/src/GHC/Num/Backend/Native.hs | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/libraries/ghc-bignum/src/GHC/Num/Backend/Native.hs b/libraries/ghc-bignum/src/GHC/Num/Backend/Native.hs index ee031178bd..723096544a 100644 --- a/libraries/ghc-bignum/src/GHC/Num/Backend/Native.hs +++ b/libraries/ghc-bignum/src/GHC/Num/Backend/Native.hs @@ -182,8 +182,8 @@ bignat_mul mwa wa wb s1 = !ctzB = word2Int# (bigNatCtzWord# wb) -- multiply a single bj Word# to the whole wa WordArray - mul bj j i carry s - | isTrue# (i ==# szA) + mul mwa wa bj j i carry s + | isTrue# (i ==# wordArraySize# wa) -- write the carry = mwaAddInplaceWord# mwa (i +# j) carry s @@ -193,7 +193,7 @@ bignat_mul mwa wa wb s1 = !(# c'',r #) = plusWord2# r' carry carry' = plusWord# c' c'' in case mwaAddInplaceWord# mwa (i +# j) r s of - s' -> mul bj j (i +# 1#) carry' s' + s' -> mul mwa wa bj j (i +# 1#) carry' s' -- for each bj in wb, call `mul bj wa` mulEachB i s @@ -201,7 +201,7 @@ bignat_mul mwa wa wb s1 = | True = case indexWordArray# wb i of -- detect bj == 0## and skip the loop 0## -> mulEachB (i +# 1#) s - bi -> case mul bi i ctzA 0## s of + bi -> case mul mwa wa bi i ctzA 0## s of s' -> mulEachB (i +# 1#) s' bignat_sub |