Boolean ≠`˘ implementation
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@ -335,12 +335,13 @@ B scan_rows_bit(Md1D* fd, B x) {
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#if SINGELI
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if (!v(fd->f)->flags) return bi_N;
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u8 rtid = v(fd->f)->flags-1;
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if (rtid==n_and|rtid==n_or) {
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if (rtid==n_and|rtid==n_or|rtid==n_ne) {
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usz *sh = SH(x); usz n = sh[0]; usz m = sh[1];
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u64* xp = bitarr_ptr(x);
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u64* rp; B r = m_bitarrc(&rp, x);
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if (rtid==n_and) si_scan_rows_and(xp, rp, n, m);
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else si_scan_rows_or (xp, rp, n, m);
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if (rtid==n_and) si_scan_rows_and(xp, rp, n, m);
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else if (rtid==n_or ) si_scan_rows_or (xp, rp, n, m);
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else si_scan_rows_ne (xp, rp, n, m);
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decG(x); return r;
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}
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if (rtid==n_add && SH(x)[1]<128) {
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@ -376,5 +376,50 @@ fn scan_rows_andor{id}(src:*u64, dst:*u64, n:usz, l:usz) : void = {
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}
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}
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fn scan_rows_neq(x:*u64, r:*u64, n:usz, l:usz) : void = {
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def scan_word = prefix_byshift{^, <<}
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assert{l > 0}
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nl := n*l
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nw := cdiv{nl, 64}
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if (l < 64) {
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if ((l & (l-1)) == 0) {
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m:u64 = (~u64~~0) / ((u64~~1 << l)-1)
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@for (r, x over nw) {
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s:= scan_word{x}
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b:= s<<1 & m # last bit of previous row
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r = s ^ (b<<l - b)
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}
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} else {
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d:usz = 64 % l
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m:u64 = (~u64~~0 >> d) / ((u64~~1 << l)-1)
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m = m<<l | 1
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c:u64 = 0 # carry
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@for (x, r over nw) {
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s:= scan_word{x}
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f:= (m-1)&~m # bits before first full row
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b:= s<<1 & m # last bit of previous row
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r = s ^ ((c & f) | (b<<l - b))
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c = -(r>>63)
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m = m>>d | m<<(l-d)
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}
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}
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} else {
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i :usz = 0 # row bit index
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iw:usz = 0 # starting word
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c:u64 = 0 # carry
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while (1) {
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i+= l; ii := iw; iw = cdiv{i, 64}
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scan_neq{}(c, x+ii, r+ii, promote{u64,iw-ii})
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if (i == nl) return{}
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s:= load{r, iw-1}
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q := i%64
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s^= -(s<<1 & u64~~1<<q)
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store{r, iw-1, s}
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c = -((s &- (q>0)) >> 63)
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}
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}
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}
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export{'si_scan_rows_and', scan_rows_andor{0}}
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export{'si_scan_rows_or', scan_rows_andor{1}}
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export{'si_scan_rows_ne', scan_rows_neq}
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