Eliminate a loop when resizing ordered hash
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@ -35,7 +35,7 @@ def hash_val{x:u32 & hasarch{'SSE4.2'}} = {
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# Allocate and initialize resizing hash table
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# Initial size sz+ext and maximum size msz+ext
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# One region for each type in Ts initialized with value from v0s
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def hash_alloc{logsz, msz, ext, Ts, v0s} = {
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def hash_alloc{logsz, msz, ext, Ts, v0s, ordered} = {
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def ws = each{width,Ts}
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each{assert, slice{ws,0,-1} >= slice{ws,1}} # Doesn't do alignment
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# Variables updated on resize
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@ -56,15 +56,16 @@ def hash_alloc{logsz, msz, ext, Ts, v0s} = {
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def hash_resize{cc, m} = {
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dif := sz*((1<<m)-1)
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sh -= m; sz <<= m
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j:usz = 0
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cc = 0
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k:tupsel{0,Ts} = 0; --k
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each{{p,v} => { p -= dif; memset{p, v, dif} }, ptrs, v0s}
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def {hash, ...vals} = ptrs; def {h0, ...v0r} = v0s
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@for (j from dif to sz + ext) {
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h := hash->j
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@for (h in hash over j from dif to sz + ext) {
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if (h != h0) {
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hash <-{j} h0
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k0 := h>>sh; k := k0; while (hash->k!=h0) ++k
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k0 := h>>sh
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if (ordered) { k = max{k0, k+1} } # k0 can't be less than k
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else { k = k0; while (hash->k!=h0) ++k }
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cc += cast_i{usz, k-k0}
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hash <-{k} h
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def move{p,v0} = {
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@ -360,7 +360,7 @@ fn hashtab{T, name}(rp:*rty{name}, iv:*void, m:usz, fv:*void, n:usz, links:ity{n
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maxh := T~~maxvalue{T}
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def aux = prim!='∊'
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def {tabs, sz, sh, hash_resize, hash_free} = hash_alloc{
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sl, msz, ext, tup{T, ...aux**u32}, tup{maxh, ...aux**'any'}
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sl, msz, ext, tup{T, ...aux**u32}, tup{maxh, ...aux**'any'}, 1
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}
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def {hash,...vals} = tabs
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@ -25,7 +25,7 @@ fn selfhashtab{T, name}(rp:*rty{name}, xp:*T, n:usz) = {
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rp <-{0} res0
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def aux = prim!='∊'
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def {{hash,...vals}, sz, sh, hash_resize, hash_free} = hash_alloc{
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sl, msz, ext, tup{T, ...aux**u32}, tup{x0, ...aux**0}
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sl, msz, ext, tup{T, ...aux**u32}, tup{x0, ...aux**0}, 0
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}
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# Resize or abort if more than 1/2^thresh collisions/element
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