Sum counts in groups of 4 when possible
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@ -23,6 +23,8 @@ def fold{F, x:T & width{T}==128 & hasarch{'X86_64'}} = {
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}
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def fold{F, x:T & width{T}==256 & hasarch{'X86_64'}} = fold{F, F{half{x, 0}, half{x, 1}}}
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fn sum_vec{T==[32]i8}(v:T) = fold{+, [16]i16~~fold{+, unpackQ{v, T**0}}}
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def inc{ptr, ind, v} = store{ptr, ind, v + load{ptr, ind}}
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def inc{ptr, ind} = inc{ptr, ind, 1}
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@ -39,25 +41,30 @@ fn count{T}(tab:*usz, x:*ty_u{T}, n:u64) : u1 = {
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b := r / vec
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xv := *V~~x
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used_eq:u1 = 0
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if (r >= 256) {
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if (r >= 128) {
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b = block; if (r < vec*b) b = r / vec
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mv := V**0
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@for (xv over b) mv = max{mv, xv}
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mi := iV~~mv
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if (homAny{mi < iV**0}) return{1}
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if (homAll{mi <= iV**32}) {
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if (homAll{mi <= iV**48}) {
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used_eq = 1
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r = b * vec
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m := fold{max, mv}
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total := b*vec
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@for (j to promote{u64,m}) {
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c := V**0
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e := V**trunc{uT, j}
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@for (xv over b) c -= xv == e
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s := fold{+, [vec/2]i16~~fold{+, unpackQ{iV~~c, iV**0}}}
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total -= promote{u64, s}
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inc{tab, j, promote{usz, s}}
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m := promote{u64, fold{max, mv}}
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total := trunc{usz, b*vec}
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def count_each{j} = {
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c := copy{tuplen{j}, V**0}
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e := each{{j}=>V**trunc{uT, j}, j}
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@for (xv over b) each{{c,e} => c -= xv == e, c, e}
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def add_sum{c, j} = {
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s := promote{usz, sum_vec{iV}(iV~~c)}
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total -= s; inc{tab, j, s}
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}
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each{add_sum, c, j}
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}
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m4 := m / 4
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@for (j4 to m4) count_each{each{{k}=>4*j4 + k, iota{4}}}
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@for (j from 4*m4 to m) count_each{tup{j}}
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inc{tab, m, trunc{usz,total}}
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}
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}
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