/*
 * Copyright (c) 2015-2017, Intel Corporation
 * Copyright (c) 2020-2021, VectorCamp PC
 *
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 * modification, are permitted provided that the following conditions are met:
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 *    notice, this list of conditions and the following disclaimer in the
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 *    may be used to endorse or promote products derived from this software
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 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 */

/** \file
 * \brief Truffle: character class acceleration.
 *
 */

template <uint16_t S>
static really_inline
const SuperVector<S> blockSingleMask(SuperVector<S> shuf_mask_lo_highclear, SuperVector<S> shuf_mask_lo_highset, SuperVector<S> chars) {

    chars.print8("chars");
    shuf_mask_lo_highclear.print8("shuf_mask_lo_highclear");
    shuf_mask_lo_highset.print8("shuf_mask_lo_highset");

    SuperVector<S> highconst = SuperVector<S>::dup_u8(0x80);
    highconst.print8("highconst");
    SuperVector<S> shuf_mask_hi = SuperVector<S>::dup_u64(0x8040201008040201);
    shuf_mask_hi.print8("shuf_mask_hi");
    
    SuperVector<S> shuf1 = shuf_mask_lo_highclear.pshufb(chars);
    shuf1.print8("shuf1");
    SuperVector<S> t1 = chars ^ highconst;
    t1.print8("t1");
    SuperVector<S> shuf2 = shuf_mask_lo_highset.pshufb(t1);
    shuf2.print8("shuf2");
    SuperVector<S> t2 = highconst.opandnot(chars.template vshr_64_imm<4>());
    t2.print8("t2");
    SuperVector<S> shuf3 = shuf_mask_hi.pshufb(t2);
    shuf3.print8("shuf3");
    SuperVector<S> res = (shuf1 | shuf2) & shuf3;
    res.print8("(shuf1 | shuf2) & shuf3");

    return !res.eq(SuperVector<S>::Zeroes());
}