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U64 nextBit( U64 **p, U8 *o ) {                  // p: pointer to poin
+ter to current quad; o: pointer to current offset
    if( ++( *o ) == 64 ) {                       // increment the offs
+et and detect transitions across quad boundaries.
...
    // Get the 'current' (unshifted) quad value; and the next
    return __shiftleft128( *( *p + 1 ), **p, *o );         // return t
+he value from the higher location with *o bits from lo shifted in fro
+m the right.
}

    mov    rax, QWORD PTR [r11+r9+16]
    mov    r8, QWORD PTR [r11+r9+8]

; 41   :     while( hay < eHay ) {                        // until we 
+reach the end of the haystack

...

; 61   :     }