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Diffstat (limited to 'third_party/highway/hwy/contrib/bit_pack/bit_pack-inl.h')
| -rw-r--r-- | third_party/highway/hwy/contrib/bit_pack/bit_pack-inl.h | 2599 |
1 files changed, 2599 insertions, 0 deletions
diff --git a/third_party/highway/hwy/contrib/bit_pack/bit_pack-inl.h b/third_party/highway/hwy/contrib/bit_pack/bit_pack-inl.h new file mode 100644 index 0000000000..04d015453b --- /dev/null +++ b/third_party/highway/hwy/contrib/bit_pack/bit_pack-inl.h @@ -0,0 +1,2599 @@ +// Copyright 2022 Google LLC +// SPDX-License-Identifier: Apache-2.0 +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// Per-target include guard +#if defined(HIGHWAY_HWY_CONTRIB_BIT_PACK_INL_H_) == \ + defined(HWY_TARGET_TOGGLE) +#ifdef HIGHWAY_HWY_CONTRIB_BIT_PACK_INL_H_ +#undef HIGHWAY_HWY_CONTRIB_BIT_PACK_INL_H_ +#else +#define HIGHWAY_HWY_CONTRIB_BIT_PACK_INL_H_ +#endif + +#include "hwy/highway.h" + +HWY_BEFORE_NAMESPACE(); +namespace hwy { +namespace HWY_NAMESPACE { + +// The entry points are class templates specialized below for each number of +// bits. Each provides Pack and Unpack member functions which load (Pack) or +// store (Unpack) B raw vectors, and store (Pack) or load (Unpack) a number of +// packed vectors equal to kBits. B denotes the bits per lane: 8 for Pack8, 16 +// for Pack16, which is also the upper bound for kBits. +template <size_t kBits> // <= 8 +struct Pack8 {}; +template <size_t kBits> // <= 16 +struct Pack16 {}; + +template <> +struct Pack8<1> { + template <class D8> + HWY_INLINE void Pack(D8 d8, const uint8_t* HWY_RESTRICT raw, + uint8_t* HWY_RESTRICT packed_out) const { + const RepartitionToWide<decltype(d8)> d16; + using VU16 = Vec<decltype(d16)>; + const size_t N8 = Lanes(d8); + // 16-bit shifts avoid masking (bits will not cross 8-bit lanes). + const VU16 raw0 = BitCast(d16, LoadU(d8, raw + 0 * N8)); + const VU16 raw1 = BitCast(d16, LoadU(d8, raw + 1 * N8)); + const VU16 raw2 = BitCast(d16, LoadU(d8, raw + 2 * N8)); + const VU16 raw3 = BitCast(d16, LoadU(d8, raw + 3 * N8)); + const VU16 raw4 = BitCast(d16, LoadU(d8, raw + 4 * N8)); + const VU16 raw5 = BitCast(d16, LoadU(d8, raw + 5 * N8)); + const VU16 raw6 = BitCast(d16, LoadU(d8, raw + 6 * N8)); + const VU16 raw7 = BitCast(d16, LoadU(d8, raw + 7 * N8)); + + const VU16 packed = + Xor3(Or(ShiftLeft<7>(raw7), ShiftLeft<6>(raw6)), + Xor3(ShiftLeft<5>(raw5), ShiftLeft<4>(raw4), ShiftLeft<3>(raw3)), + Xor3(ShiftLeft<2>(raw2), ShiftLeft<1>(raw1), raw0)); + StoreU(BitCast(d8, packed), d8, packed_out); + } + + template <class D8> + HWY_INLINE void Unpack(D8 d8, const uint8_t* HWY_RESTRICT packed_in, + uint8_t* HWY_RESTRICT raw) const { + const RepartitionToWide<decltype(d8)> d16; + using VU16 = Vec<decltype(d16)>; + const size_t N8 = Lanes(d8); + const VU16 mask = Set(d16, 0x0101u); // LSB in each byte + + const VU16 packed = BitCast(d16, LoadU(d8, packed_in)); + + const VU16 raw0 = And(packed, mask); + StoreU(BitCast(d8, raw0), d8, raw + 0 * N8); + + const VU16 raw1 = And(ShiftRight<1>(packed), mask); + StoreU(BitCast(d8, raw1), d8, raw + 1 * N8); + + const VU16 raw2 = And(ShiftRight<2>(packed), mask); + StoreU(BitCast(d8, raw2), d8, raw + 2 * N8); + + const VU16 raw3 = And(ShiftRight<3>(packed), mask); + StoreU(BitCast(d8, raw3), d8, raw + 3 * N8); + + const VU16 raw4 = And(ShiftRight<4>(packed), mask); + StoreU(BitCast(d8, raw4), d8, raw + 4 * N8); + + const VU16 raw5 = And(ShiftRight<5>(packed), mask); + StoreU(BitCast(d8, raw5), d8, raw + 5 * N8); + + const VU16 raw6 = And(ShiftRight<6>(packed), mask); + StoreU(BitCast(d8, raw6), d8, raw + 6 * N8); + + const VU16 raw7 = And(ShiftRight<7>(packed), mask); + StoreU(BitCast(d8, raw7), d8, raw + 7 * N8); + } +}; // Pack8<1> + +template <> +struct Pack8<2> { + template <class D8> + HWY_INLINE void Pack(D8 d8, const uint8_t* HWY_RESTRICT raw, + uint8_t* HWY_RESTRICT packed_out) const { + const RepartitionToWide<decltype(d8)> d16; + using VU16 = Vec<decltype(d16)>; + const size_t N8 = Lanes(d8); + // 16-bit shifts avoid masking (bits will not cross 8-bit lanes). + const VU16 raw0 = BitCast(d16, LoadU(d8, raw + 0 * N8)); + const VU16 raw1 = BitCast(d16, LoadU(d8, raw + 1 * N8)); + const VU16 raw2 = BitCast(d16, LoadU(d8, raw + 2 * N8)); + const VU16 raw3 = BitCast(d16, LoadU(d8, raw + 3 * N8)); + const VU16 raw4 = BitCast(d16, LoadU(d8, raw + 4 * N8)); + const VU16 raw5 = BitCast(d16, LoadU(d8, raw + 5 * N8)); + const VU16 raw6 = BitCast(d16, LoadU(d8, raw + 6 * N8)); + const VU16 raw7 = BitCast(d16, LoadU(d8, raw + 7 * N8)); + + const VU16 packed0 = Xor3(ShiftLeft<6>(raw6), ShiftLeft<4>(raw4), + Or(ShiftLeft<2>(raw2), raw0)); + const VU16 packed1 = Xor3(ShiftLeft<6>(raw7), ShiftLeft<4>(raw5), + Or(ShiftLeft<2>(raw3), raw1)); + StoreU(BitCast(d8, packed0), d8, packed_out + 0 * N8); + StoreU(BitCast(d8, packed1), d8, packed_out + 1 * N8); + } + + template <class D8> + HWY_INLINE void Unpack(D8 d8, const uint8_t* HWY_RESTRICT packed_in, + uint8_t* HWY_RESTRICT raw) const { + const RepartitionToWide<decltype(d8)> d16; + using VU16 = Vec<decltype(d16)>; + const size_t N8 = Lanes(d8); + const VU16 mask = Set(d16, 0x0303u); // Lowest 2 bits per byte + + const VU16 packed0 = BitCast(d16, LoadU(d8, packed_in + 0 * N8)); + const VU16 packed1 = BitCast(d16, LoadU(d8, packed_in + 1 * N8)); + + const VU16 raw0 = And(packed0, mask); + StoreU(BitCast(d8, raw0), d8, raw + 0 * N8); + + const VU16 raw1 = And(packed1, mask); + StoreU(BitCast(d8, raw1), d8, raw + 1 * N8); + + const VU16 raw2 = And(ShiftRight<2>(packed0), mask); + StoreU(BitCast(d8, raw2), d8, raw + 2 * N8); + + const VU16 raw3 = And(ShiftRight<2>(packed1), mask); + StoreU(BitCast(d8, raw3), d8, raw + 3 * N8); + + const VU16 raw4 = And(ShiftRight<4>(packed0), mask); + StoreU(BitCast(d8, raw4), d8, raw + 4 * N8); + + const VU16 raw5 = And(ShiftRight<4>(packed1), mask); + StoreU(BitCast(d8, raw5), d8, raw + 5 * N8); + + const VU16 raw6 = And(ShiftRight<6>(packed0), mask); + StoreU(BitCast(d8, raw6), d8, raw + 6 * N8); + + const VU16 raw7 = And(ShiftRight<6>(packed1), mask); + StoreU(BitCast(d8, raw7), d8, raw + 7 * N8); + } +}; // Pack8<2> + +template <> +struct Pack8<3> { + template <class D8> + HWY_INLINE void Pack(D8 d8, const uint8_t* HWY_RESTRICT raw, + uint8_t* HWY_RESTRICT packed_out) const { + const RepartitionToWide<decltype(d8)> d16; + using VU16 = Vec<decltype(d16)>; + const size_t N8 = Lanes(d8); + const VU16 raw0 = BitCast(d16, LoadU(d8, raw + 0 * N8)); + const VU16 raw1 = BitCast(d16, LoadU(d8, raw + 1 * N8)); + const VU16 raw2 = BitCast(d16, LoadU(d8, raw + 2 * N8)); + const VU16 raw3 = BitCast(d16, LoadU(d8, raw + 3 * N8)); + const VU16 raw4 = BitCast(d16, LoadU(d8, raw + 4 * N8)); + const VU16 raw5 = BitCast(d16, LoadU(d8, raw + 5 * N8)); + const VU16 raw6 = BitCast(d16, LoadU(d8, raw + 6 * N8)); + const VU16 raw7 = BitCast(d16, LoadU(d8, raw + 7 * N8)); + + // The upper two bits of these three will be filled with packed3 (6 bits). + VU16 packed0 = Or(ShiftLeft<3>(raw4), raw0); + VU16 packed1 = Or(ShiftLeft<3>(raw5), raw1); + VU16 packed2 = Or(ShiftLeft<3>(raw6), raw2); + const VU16 packed3 = Or(ShiftLeft<3>(raw7), raw3); + + const VU16 hi2 = Set(d16, 0xC0C0u); + packed0 = OrAnd(packed0, ShiftLeft<2>(packed3), hi2); + packed1 = OrAnd(packed1, ShiftLeft<4>(packed3), hi2); + packed2 = OrAnd(packed2, ShiftLeft<6>(packed3), hi2); + StoreU(BitCast(d8, packed0), d8, packed_out + 0 * N8); + StoreU(BitCast(d8, packed1), d8, packed_out + 1 * N8); + StoreU(BitCast(d8, packed2), d8, packed_out + 2 * N8); + } + + template <class D8> + HWY_INLINE void Unpack(D8 d8, const uint8_t* HWY_RESTRICT packed_in, + uint8_t* HWY_RESTRICT raw) const { + const RepartitionToWide<decltype(d8)> d16; + using VU16 = Vec<decltype(d16)>; + const size_t N8 = Lanes(d8); + const VU16 mask = Set(d16, 0x0707u); // Lowest 3 bits per byte + + const VU16 packed0 = BitCast(d16, LoadU(d8, packed_in + 0 * N8)); + const VU16 packed1 = BitCast(d16, LoadU(d8, packed_in + 1 * N8)); + const VU16 packed2 = BitCast(d16, LoadU(d8, packed_in + 2 * N8)); + + const VU16 raw0 = And(packed0, mask); + StoreU(BitCast(d8, raw0), d8, raw + 0 * N8); + + const VU16 raw1 = And(packed1, mask); + StoreU(BitCast(d8, raw1), d8, raw + 1 * N8); + + const VU16 raw2 = And(packed2, mask); + StoreU(BitCast(d8, raw2), d8, raw + 2 * N8); + + const VU16 raw4 = And(ShiftRight<3>(packed0), mask); + StoreU(BitCast(d8, raw4), d8, raw + 4 * N8); + + const VU16 raw5 = And(ShiftRight<3>(packed1), mask); + StoreU(BitCast(d8, raw5), d8, raw + 5 * N8); + + const VU16 raw6 = And(ShiftRight<3>(packed2), mask); + StoreU(BitCast(d8, raw6), d8, raw + 6 * N8); + + // raw73 is the concatenation of the upper two bits in packed0..2. + const VU16 hi2 = Set(d16, 0xC0C0u); + const VU16 raw73 = Xor3(ShiftRight<6>(And(packed2, hi2)), // + ShiftRight<4>(And(packed1, hi2)), + ShiftRight<2>(And(packed0, hi2))); + + const VU16 raw3 = And(mask, raw73); + StoreU(BitCast(d8, raw3), d8, raw + 3 * N8); + + const VU16 raw7 = And(mask, ShiftRight<3>(raw73)); + StoreU(BitCast(d8, raw7), d8, raw + 7 * N8); + } +}; // Pack8<3> + +template <> +struct Pack8<4> { + template <class D8> + HWY_INLINE void Pack(D8 d8, const uint8_t* HWY_RESTRICT raw, + uint8_t* HWY_RESTRICT packed_out) const { + const RepartitionToWide<decltype(d8)> d16; + using VU16 = Vec<decltype(d16)>; + const size_t N8 = Lanes(d8); + // 16-bit shifts avoid masking (bits will not cross 8-bit lanes). + const VU16 raw0 = BitCast(d16, LoadU(d8, raw + 0 * N8)); + const VU16 raw1 = BitCast(d16, LoadU(d8, raw + 1 * N8)); + const VU16 raw2 = BitCast(d16, LoadU(d8, raw + 2 * N8)); + const VU16 raw3 = BitCast(d16, LoadU(d8, raw + 3 * N8)); + const VU16 raw4 = BitCast(d16, LoadU(d8, raw + 4 * N8)); + const VU16 raw5 = BitCast(d16, LoadU(d8, raw + 5 * N8)); + const VU16 raw6 = BitCast(d16, LoadU(d8, raw + 6 * N8)); + const VU16 raw7 = BitCast(d16, LoadU(d8, raw + 7 * N8)); + + const VU16 packed0 = Or(ShiftLeft<4>(raw2), raw0); + const VU16 packed1 = Or(ShiftLeft<4>(raw3), raw1); + const VU16 packed2 = Or(ShiftLeft<4>(raw6), raw4); + const VU16 packed3 = Or(ShiftLeft<4>(raw7), raw5); + + StoreU(BitCast(d8, packed0), d8, packed_out + 0 * N8); + StoreU(BitCast(d8, packed1), d8, packed_out + 1 * N8); + StoreU(BitCast(d8, packed2), d8, packed_out + 2 * N8); + StoreU(BitCast(d8, packed3), d8, packed_out + 3 * N8); + } + + template <class D8> + HWY_INLINE void Unpack(D8 d8, const uint8_t* HWY_RESTRICT packed_in, + uint8_t* HWY_RESTRICT raw) const { + const RepartitionToWide<decltype(d8)> d16; + using VU16 = Vec<decltype(d16)>; + const size_t N8 = Lanes(d8); + const VU16 mask = Set(d16, 0x0F0Fu); // Lowest 4 bits per byte + + const VU16 packed0 = BitCast(d16, LoadU(d8, packed_in + 0 * N8)); + const VU16 packed1 = BitCast(d16, LoadU(d8, packed_in + 1 * N8)); + const VU16 packed2 = BitCast(d16, LoadU(d8, packed_in + 2 * N8)); + const VU16 packed3 = BitCast(d16, LoadU(d8, packed_in + 3 * N8)); + + const VU16 raw0 = And(packed0, mask); + StoreU(BitCast(d8, raw0), d8, raw + 0 * N8); + + const VU16 raw1 = And(packed1, mask); + StoreU(BitCast(d8, raw1), d8, raw + 1 * N8); + + const VU16 raw2 = And(ShiftRight<4>(packed0), mask); + StoreU(BitCast(d8, raw2), d8, raw + 2 * N8); + + const VU16 raw3 = And(ShiftRight<4>(packed1), mask); + StoreU(BitCast(d8, raw3), d8, raw + 3 * N8); + + const VU16 raw4 = And(packed2, mask); + StoreU(BitCast(d8, raw4), d8, raw + 4 * N8); + + const VU16 raw5 = And(packed3, mask); + StoreU(BitCast(d8, raw5), d8, raw + 5 * N8); + + const VU16 raw6 = And(ShiftRight<4>(packed2), mask); + StoreU(BitCast(d8, raw6), d8, raw + 6 * N8); + + const VU16 raw7 = And(ShiftRight<4>(packed3), mask); + StoreU(BitCast(d8, raw7), d8, raw + 7 * N8); + } +}; // Pack8<4> + +template <> +struct Pack8<5> { + template <class D8> + HWY_INLINE void Pack(D8 d8, const uint8_t* HWY_RESTRICT raw, + uint8_t* HWY_RESTRICT packed_out) const { + const RepartitionToWide<decltype(d8)> d16; + using VU16 = Vec<decltype(d16)>; + const size_t N8 = Lanes(d8); + const VU16 raw0 = BitCast(d16, LoadU(d8, raw + 0 * N8)); + const VU16 raw1 = BitCast(d16, LoadU(d8, raw + 1 * N8)); + const VU16 raw2 = BitCast(d16, LoadU(d8, raw + 2 * N8)); + const VU16 raw3 = BitCast(d16, LoadU(d8, raw + 3 * N8)); + const VU16 raw4 = BitCast(d16, LoadU(d8, raw + 4 * N8)); + const VU16 raw5 = BitCast(d16, LoadU(d8, raw + 5 * N8)); + const VU16 raw6 = BitCast(d16, LoadU(d8, raw + 6 * N8)); + const VU16 raw7 = BitCast(d16, LoadU(d8, raw + 7 * N8)); + + // Fill upper three bits with upper bits from raw4..7. + const VU16 hi3 = Set(d16, 0xE0E0u); + const VU16 packed0 = OrAnd(raw0, ShiftLeft<3>(raw4), hi3); + const VU16 packed1 = OrAnd(raw1, ShiftLeft<3>(raw5), hi3); + const VU16 packed2 = OrAnd(raw2, ShiftLeft<3>(raw6), hi3); + const VU16 packed3 = OrAnd(raw3, ShiftLeft<3>(raw7), hi3); + + StoreU(BitCast(d8, packed0), d8, packed_out + 0 * N8); + StoreU(BitCast(d8, packed1), d8, packed_out + 1 * N8); + StoreU(BitCast(d8, packed2), d8, packed_out + 2 * N8); + StoreU(BitCast(d8, packed3), d8, packed_out + 3 * N8); + + // Combine lower two bits of raw4..7 into packed4. + const VU16 lo2 = Set(d16, 0x0303u); + const VU16 packed4 = Or(And(raw4, lo2), Xor3(ShiftLeft<2>(And(raw5, lo2)), + ShiftLeft<4>(And(raw6, lo2)), + ShiftLeft<6>(And(raw7, lo2)))); + StoreU(BitCast(d8, packed4), d8, packed_out + 4 * N8); + } + + template <class D8> + HWY_INLINE void Unpack(D8 d8, const uint8_t* HWY_RESTRICT packed_in, + uint8_t* HWY_RESTRICT raw) const { + const RepartitionToWide<decltype(d8)> d16; + using VU16 = Vec<decltype(d16)>; + const size_t N8 = Lanes(d8); + + const VU16 packed0 = BitCast(d16, LoadU(d8, packed_in + 0 * N8)); + const VU16 packed1 = BitCast(d16, LoadU(d8, packed_in + 1 * N8)); + const VU16 packed2 = BitCast(d16, LoadU(d8, packed_in + 2 * N8)); + const VU16 packed3 = BitCast(d16, LoadU(d8, packed_in + 3 * N8)); + const VU16 packed4 = BitCast(d16, LoadU(d8, packed_in + 4 * N8)); + + const VU16 mask = Set(d16, 0x1F1Fu); // Lowest 5 bits per byte + + const VU16 raw0 = And(packed0, mask); + StoreU(BitCast(d8, raw0), d8, raw + 0 * N8); + + const VU16 raw1 = And(packed1, mask); + StoreU(BitCast(d8, raw1), d8, raw + 1 * N8); + + const VU16 raw2 = And(packed2, mask); + StoreU(BitCast(d8, raw2), d8, raw + 2 * N8); + + const VU16 raw3 = And(packed3, mask); + StoreU(BitCast(d8, raw3), d8, raw + 3 * N8); + + // The upper bits are the top 3 bits shifted right by three. + const VU16 top4 = ShiftRight<3>(AndNot(mask, packed0)); + const VU16 top5 = ShiftRight<3>(AndNot(mask, packed1)); + const VU16 top6 = ShiftRight<3>(AndNot(mask, packed2)); + const VU16 top7 = ShiftRight<3>(AndNot(mask, packed3)); + + // Insert the lower 2 bits, which were concatenated into a byte. + const VU16 lo2 = Set(d16, 0x0303u); + const VU16 raw4 = OrAnd(top4, lo2, packed4); + const VU16 raw5 = OrAnd(top5, lo2, ShiftRight<2>(packed4)); + const VU16 raw6 = OrAnd(top6, lo2, ShiftRight<4>(packed4)); + const VU16 raw7 = OrAnd(top7, lo2, ShiftRight<6>(packed4)); + + StoreU(BitCast(d8, raw4), d8, raw + 4 * N8); + StoreU(BitCast(d8, raw5), d8, raw + 5 * N8); + StoreU(BitCast(d8, raw6), d8, raw + 6 * N8); + StoreU(BitCast(d8, raw7), d8, raw + 7 * N8); + } +}; // Pack8<5> + +template <> +struct Pack8<6> { + template <class D8> + HWY_INLINE void Pack(D8 d8, const uint8_t* HWY_RESTRICT raw, + uint8_t* HWY_RESTRICT packed_out) const { + const RepartitionToWide<decltype(d8)> d16; + using VU16 = Vec<decltype(d16)>; + const size_t N8 = Lanes(d8); + const VU16 raw0 = BitCast(d16, LoadU(d8, raw + 0 * N8)); + const VU16 raw1 = BitCast(d16, LoadU(d8, raw + 1 * N8)); + const VU16 raw2 = BitCast(d16, LoadU(d8, raw + 2 * N8)); + const VU16 raw3 = BitCast(d16, LoadU(d8, raw + 3 * N8)); + const VU16 raw4 = BitCast(d16, LoadU(d8, raw + 4 * N8)); + const VU16 raw5 = BitCast(d16, LoadU(d8, raw + 5 * N8)); + const VU16 raw6 = BitCast(d16, LoadU(d8, raw + 6 * N8)); + const VU16 raw7 = BitCast(d16, LoadU(d8, raw + 7 * N8)); + + const VU16 hi2 = Set(d16, 0xC0C0u); + // Each triplet of these stores raw3/raw7 (6 bits) in the upper 2 bits. + const VU16 packed0 = OrAnd(raw0, ShiftLeft<2>(raw3), hi2); + const VU16 packed1 = OrAnd(raw1, ShiftLeft<4>(raw3), hi2); + const VU16 packed2 = OrAnd(raw2, ShiftLeft<6>(raw3), hi2); + const VU16 packed3 = OrAnd(raw4, ShiftLeft<2>(raw7), hi2); + const VU16 packed4 = OrAnd(raw5, ShiftLeft<4>(raw7), hi2); + const VU16 packed5 = OrAnd(raw6, ShiftLeft<6>(raw7), hi2); + + StoreU(BitCast(d8, packed0), d8, packed_out + 0 * N8); + StoreU(BitCast(d8, packed1), d8, packed_out + 1 * N8); + StoreU(BitCast(d8, packed2), d8, packed_out + 2 * N8); + StoreU(BitCast(d8, packed3), d8, packed_out + 3 * N8); + StoreU(BitCast(d8, packed4), d8, packed_out + 4 * N8); + StoreU(BitCast(d8, packed5), d8, packed_out + 5 * N8); + } + + template <class D8> + HWY_INLINE void Unpack(D8 d8, const uint8_t* HWY_RESTRICT packed_in, + uint8_t* HWY_RESTRICT raw) const { + const RepartitionToWide<decltype(d8)> d16; + using VU16 = Vec<decltype(d16)>; + const size_t N8 = Lanes(d8); + const VU16 mask = Set(d16, 0x3F3Fu); // Lowest 6 bits per byte + + const VU16 packed0 = BitCast(d16, LoadU(d8, packed_in + 0 * N8)); + const VU16 packed1 = BitCast(d16, LoadU(d8, packed_in + 1 * N8)); + const VU16 packed2 = BitCast(d16, LoadU(d8, packed_in + 2 * N8)); + const VU16 packed3 = BitCast(d16, LoadU(d8, packed_in + 3 * N8)); + const VU16 packed4 = BitCast(d16, LoadU(d8, packed_in + 4 * N8)); + const VU16 packed5 = BitCast(d16, LoadU(d8, packed_in + 5 * N8)); + + const VU16 raw0 = And(packed0, mask); + StoreU(BitCast(d8, raw0), d8, raw + 0 * N8); + + const VU16 raw1 = And(packed1, mask); + StoreU(BitCast(d8, raw1), d8, raw + 1 * N8); + + const VU16 raw2 = And(packed2, mask); + StoreU(BitCast(d8, raw2), d8, raw + 2 * N8); + + const VU16 raw4 = And(packed3, mask); + StoreU(BitCast(d8, raw4), d8, raw + 4 * N8); + + const VU16 raw5 = And(packed4, mask); + StoreU(BitCast(d8, raw5), d8, raw + 5 * N8); + + const VU16 raw6 = And(packed5, mask); + StoreU(BitCast(d8, raw6), d8, raw + 6 * N8); + + // raw3/7 are the concatenation of the upper two bits in packed0..2. + const VU16 raw3 = Xor3(ShiftRight<6>(AndNot(mask, packed2)), + ShiftRight<4>(AndNot(mask, packed1)), + ShiftRight<2>(AndNot(mask, packed0))); + const VU16 raw7 = Xor3(ShiftRight<6>(AndNot(mask, packed5)), + ShiftRight<4>(AndNot(mask, packed4)), + ShiftRight<2>(AndNot(mask, packed3))); + StoreU(BitCast(d8, raw3), d8, raw + 3 * N8); + StoreU(BitCast(d8, raw7), d8, raw + 7 * N8); + } +}; // Pack8<6> + +template <> +struct Pack8<7> { + template <class D8> + HWY_INLINE void Pack(D8 d8, const uint8_t* HWY_RESTRICT raw, + uint8_t* HWY_RESTRICT packed_out) const { + const RepartitionToWide<decltype(d8)> d16; + using VU16 = Vec<decltype(d16)>; + const size_t N8 = Lanes(d8); + const VU16 raw0 = BitCast(d16, LoadU(d8, raw + 0 * N8)); + const VU16 raw1 = BitCast(d16, LoadU(d8, raw + 1 * N8)); + const VU16 raw2 = BitCast(d16, LoadU(d8, raw + 2 * N8)); + const VU16 raw3 = BitCast(d16, LoadU(d8, raw + 3 * N8)); + const VU16 raw4 = BitCast(d16, LoadU(d8, raw + 4 * N8)); + const VU16 raw5 = BitCast(d16, LoadU(d8, raw + 5 * N8)); + const VU16 raw6 = BitCast(d16, LoadU(d8, raw + 6 * N8)); + // Inserted into top bit of packed0..6. + const VU16 raw7 = BitCast(d16, LoadU(d8, raw + 7 * N8)); + + const VU16 hi1 = Set(d16, 0x8080u); + const VU16 packed0 = OrAnd(raw0, Add(raw7, raw7), hi1); + const VU16 packed1 = OrAnd(raw1, ShiftLeft<2>(raw7), hi1); + const VU16 packed2 = OrAnd(raw2, ShiftLeft<3>(raw7), hi1); + const VU16 packed3 = OrAnd(raw3, ShiftLeft<4>(raw7), hi1); + const VU16 packed4 = OrAnd(raw4, ShiftLeft<5>(raw7), hi1); + const VU16 packed5 = OrAnd(raw5, ShiftLeft<6>(raw7), hi1); + const VU16 packed6 = OrAnd(raw6, ShiftLeft<7>(raw7), hi1); + + StoreU(BitCast(d8, packed0), d8, packed_out + 0 * N8); + StoreU(BitCast(d8, packed1), d8, packed_out + 1 * N8); + StoreU(BitCast(d8, packed2), d8, packed_out + 2 * N8); + StoreU(BitCast(d8, packed3), d8, packed_out + 3 * N8); + StoreU(BitCast(d8, packed4), d8, packed_out + 4 * N8); + StoreU(BitCast(d8, packed5), d8, packed_out + 5 * N8); + StoreU(BitCast(d8, packed6), d8, packed_out + 6 * N8); + } + + template <class D8> + HWY_INLINE void Unpack(D8 d8, const uint8_t* HWY_RESTRICT packed_in, + uint8_t* HWY_RESTRICT raw) const { + const RepartitionToWide<decltype(d8)> d16; + using VU16 = Vec<decltype(d16)>; + const size_t N8 = Lanes(d8); + + const VU16 packed0 = BitCast(d16, LoadU(d8, packed_in + 0 * N8)); + const VU16 packed1 = BitCast(d16, LoadU(d8, packed_in + 1 * N8)); + const VU16 packed2 = BitCast(d16, LoadU(d8, packed_in + 2 * N8)); + const VU16 packed3 = BitCast(d16, LoadU(d8, packed_in + 3 * N8)); + const VU16 packed4 = BitCast(d16, LoadU(d8, packed_in + 4 * N8)); + const VU16 packed5 = BitCast(d16, LoadU(d8, packed_in + 5 * N8)); + const VU16 packed6 = BitCast(d16, LoadU(d8, packed_in + 6 * N8)); + + const VU16 mask = Set(d16, 0x7F7Fu); // Lowest 7 bits per byte + + const VU16 raw0 = And(packed0, mask); + StoreU(BitCast(d8, raw0), d8, raw + 0 * N8); + + const VU16 raw1 = And(packed1, mask); + StoreU(BitCast(d8, raw1), d8, raw + 1 * N8); + + const VU16 raw2 = And(packed2, mask); + StoreU(BitCast(d8, raw2), d8, raw + 2 * N8); + + const VU16 raw3 = And(packed3, mask); + StoreU(BitCast(d8, raw3), d8, raw + 3 * N8); + + const VU16 raw4 = And(packed4, mask); + StoreU(BitCast(d8, raw4), d8, raw + 4 * N8); + + const VU16 raw5 = And(packed5, mask); + StoreU(BitCast(d8, raw5), d8, raw + 5 * N8); + + const VU16 raw6 = And(packed6, mask); + StoreU(BitCast(d8, raw6), d8, raw + 6 * N8); + + const VU16 p0 = Xor3(ShiftRight<7>(AndNot(mask, packed6)), + ShiftRight<6>(AndNot(mask, packed5)), + ShiftRight<5>(AndNot(mask, packed4))); + const VU16 p1 = Xor3(ShiftRight<4>(AndNot(mask, packed3)), + ShiftRight<3>(AndNot(mask, packed2)), + ShiftRight<2>(AndNot(mask, packed1))); + const VU16 raw7 = Xor3(ShiftRight<1>(AndNot(mask, packed0)), p0, p1); + StoreU(BitCast(d8, raw7), d8, raw + 7 * N8); + } +}; // Pack8<7> + +template <> +struct Pack8<8> { + template <class D8> + HWY_INLINE void Pack(D8 d8, const uint8_t* HWY_RESTRICT raw, + uint8_t* HWY_RESTRICT packed_out) const { + using VU8 = Vec<decltype(d8)>; + const size_t N8 = Lanes(d8); + const VU8 raw0 = LoadU(d8, raw + 0 * N8); + const VU8 raw1 = LoadU(d8, raw + 1 * N8); + const VU8 raw2 = LoadU(d8, raw + 2 * N8); + const VU8 raw3 = LoadU(d8, raw + 3 * N8); + const VU8 raw4 = LoadU(d8, raw + 4 * N8); + const VU8 raw5 = LoadU(d8, raw + 5 * N8); + const VU8 raw6 = LoadU(d8, raw + 6 * N8); + const VU8 raw7 = LoadU(d8, raw + 7 * N8); + + StoreU(raw0, d8, packed_out + 0 * N8); + StoreU(raw1, d8, packed_out + 1 * N8); + StoreU(raw2, d8, packed_out + 2 * N8); + StoreU(raw3, d8, packed_out + 3 * N8); + StoreU(raw4, d8, packed_out + 4 * N8); + StoreU(raw5, d8, packed_out + 5 * N8); + StoreU(raw6, d8, packed_out + 6 * N8); + StoreU(raw7, d8, packed_out + 7 * N8); + } + + template <class D8> + HWY_INLINE void Unpack(D8 d8, const uint8_t* HWY_RESTRICT packed_in, + uint8_t* HWY_RESTRICT raw) const { + using VU8 = Vec<decltype(d8)>; + const size_t N8 = Lanes(d8); + const VU8 raw0 = LoadU(d8, packed_in + 0 * N8); + const VU8 raw1 = LoadU(d8, packed_in + 1 * N8); + const VU8 raw2 = LoadU(d8, packed_in + 2 * N8); + const VU8 raw3 = LoadU(d8, packed_in + 3 * N8); + const VU8 raw4 = LoadU(d8, packed_in + 4 * N8); + const VU8 raw5 = LoadU(d8, packed_in + 5 * N8); + const VU8 raw6 = LoadU(d8, packed_in + 6 * N8); + const VU8 raw7 = LoadU(d8, packed_in + 7 * N8); + + StoreU(raw0, d8, raw + 0 * N8); + StoreU(raw1, d8, raw + 1 * N8); + StoreU(raw2, d8, raw + 2 * N8); + StoreU(raw3, d8, raw + 3 * N8); + StoreU(raw4, d8, raw + 4 * N8); + StoreU(raw5, d8, raw + 5 * N8); + StoreU(raw6, d8, raw + 6 * N8); + StoreU(raw7, d8, raw + 7 * N8); + } +}; // Pack8<8> + +template <> +struct Pack16<1> { + template <class D> + HWY_INLINE void Pack(D d, const uint16_t* HWY_RESTRICT raw, + uint16_t* HWY_RESTRICT packed_out) const { + using VU16 = Vec<decltype(d)>; + const size_t N = Lanes(d); + const VU16 raw0 = LoadU(d, raw + 0 * N); + const VU16 raw1 = LoadU(d, raw + 1 * N); + const VU16 raw2 = LoadU(d, raw + 2 * N); + const VU16 raw3 = LoadU(d, raw + 3 * N); + const VU16 raw4 = LoadU(d, raw + 4 * N); + const VU16 raw5 = LoadU(d, raw + 5 * N); + const VU16 raw6 = LoadU(d, raw + 6 * N); + const VU16 raw7 = LoadU(d, raw + 7 * N); + const VU16 raw8 = LoadU(d, raw + 8 * N); + const VU16 raw9 = LoadU(d, raw + 9 * N); + const VU16 rawA = LoadU(d, raw + 0xA * N); + const VU16 rawB = LoadU(d, raw + 0xB * N); + const VU16 rawC = LoadU(d, raw + 0xC * N); + const VU16 rawD = LoadU(d, raw + 0xD * N); + const VU16 rawE = LoadU(d, raw + 0xE * N); + const VU16 rawF = LoadU(d, raw + 0xF * N); + + const VU16 p0 = Xor3(ShiftLeft<2>(raw2), Add(raw1, raw1), raw0); + const VU16 p1 = + Xor3(ShiftLeft<5>(raw5), ShiftLeft<4>(raw4), ShiftLeft<3>(raw3)); + const VU16 p2 = + Xor3(ShiftLeft<8>(raw8), ShiftLeft<7>(raw7), ShiftLeft<6>(raw6)); + const VU16 p3 = + Xor3(ShiftLeft<0xB>(rawB), ShiftLeft<0xA>(rawA), ShiftLeft<9>(raw9)); + const VU16 p4 = + Xor3(ShiftLeft<0xE>(rawE), ShiftLeft<0xD>(rawD), ShiftLeft<0xC>(rawC)); + const VU16 packed = + Or(Xor3(ShiftLeft<0xF>(rawF), p0, p1), Xor3(p2, p3, p4)); + StoreU(packed, d, packed_out); + } + + template <class D> + HWY_INLINE void Unpack(D d, const uint16_t* HWY_RESTRICT packed_in, + uint16_t* HWY_RESTRICT raw) const { + using VU16 = Vec<decltype(d)>; + const size_t N = Lanes(d); + const VU16 mask = Set(d, 1u); // Lowest bit + + const VU16 packed = LoadU(d, packed_in); + + const VU16 raw0 = And(packed, mask); + StoreU(raw0, d, raw + 0 * N); + + const VU16 raw1 = And(ShiftRight<1>(packed), mask); + StoreU(raw1, d, raw + 1 * N); + + const VU16 raw2 = And(ShiftRight<2>(packed), mask); + StoreU(raw2, d, raw + 2 * N); + + const VU16 raw3 = And(ShiftRight<3>(packed), mask); + StoreU(raw3, d, raw + 3 * N); + + const VU16 raw4 = And(ShiftRight<4>(packed), mask); + StoreU(raw4, d, raw + 4 * N); + + const VU16 raw5 = And(ShiftRight<5>(packed), mask); + StoreU(raw5, d, raw + 5 * N); + + const VU16 raw6 = And(ShiftRight<6>(packed), mask); + StoreU(raw6, d, raw + 6 * N); + + const VU16 raw7 = And(ShiftRight<7>(packed), mask); + StoreU(raw7, d, raw + 7 * N); + + const VU16 raw8 = And(ShiftRight<8>(packed), mask); + StoreU(raw8, d, raw + 8 * N); + + const VU16 raw9 = And(ShiftRight<9>(packed), mask); + StoreU(raw9, d, raw + 9 * N); + + const VU16 rawA = And(ShiftRight<0xA>(packed), mask); + StoreU(rawA, d, raw + 0xA * N); + + const VU16 rawB = And(ShiftRight<0xB>(packed), mask); + StoreU(rawB, d, raw + 0xB * N); + + const VU16 rawC = And(ShiftRight<0xC>(packed), mask); + StoreU(rawC, d, raw + 0xC * N); + + const VU16 rawD = And(ShiftRight<0xD>(packed), mask); + StoreU(rawD, d, raw + 0xD * N); + + const VU16 rawE = And(ShiftRight<0xE>(packed), mask); + StoreU(rawE, d, raw + 0xE * N); + + const VU16 rawF = ShiftRight<0xF>(packed); + StoreU(rawF, d, raw + 0xF * N); + } +}; // Pack16<1> + +template <> +struct Pack16<2> { + template <class D> + HWY_INLINE void Pack(D d, const uint16_t* HWY_RESTRICT raw, + uint16_t* HWY_RESTRICT packed_out) const { + using VU16 = Vec<decltype(d)>; + const size_t N = Lanes(d); + const VU16 raw0 = LoadU(d, raw + 0 * N); + const VU16 raw1 = LoadU(d, raw + 1 * N); + const VU16 raw2 = LoadU(d, raw + 2 * N); + const VU16 raw3 = LoadU(d, raw + 3 * N); + const VU16 raw4 = LoadU(d, raw + 4 * N); + const VU16 raw5 = LoadU(d, raw + 5 * N); + const VU16 raw6 = LoadU(d, raw + 6 * N); + const VU16 raw7 = LoadU(d, raw + 7 * N); + const VU16 raw8 = LoadU(d, raw + 8 * N); + const VU16 raw9 = LoadU(d, raw + 9 * N); + const VU16 rawA = LoadU(d, raw + 0xA * N); + const VU16 rawB = LoadU(d, raw + 0xB * N); + const VU16 rawC = LoadU(d, raw + 0xC * N); + const VU16 rawD = LoadU(d, raw + 0xD * N); + const VU16 rawE = LoadU(d, raw + 0xE * N); + const VU16 rawF = LoadU(d, raw + 0xF * N); + + VU16 packed0 = Xor3(ShiftLeft<4>(raw4), ShiftLeft<2>(raw2), raw0); + VU16 packed1 = Xor3(ShiftLeft<4>(raw5), ShiftLeft<2>(raw3), raw1); + packed0 = Xor3(packed0, ShiftLeft<8>(raw8), ShiftLeft<6>(raw6)); + packed1 = Xor3(packed1, ShiftLeft<8>(raw9), ShiftLeft<6>(raw7)); + + packed0 = Xor3(packed0, ShiftLeft<12>(rawC), ShiftLeft<10>(rawA)); + packed1 = Xor3(packed1, ShiftLeft<12>(rawD), ShiftLeft<10>(rawB)); + + packed0 = Or(packed0, ShiftLeft<14>(rawE)); + packed1 = Or(packed1, ShiftLeft<14>(rawF)); + StoreU(packed0, d, packed_out + 0 * N); + StoreU(packed1, d, packed_out + 1 * N); + } + + template <class D> + HWY_INLINE void Unpack(D d, const uint16_t* HWY_RESTRICT packed_in, + uint16_t* HWY_RESTRICT raw) const { + using VU16 = Vec<decltype(d)>; + const size_t N = Lanes(d); + const VU16 mask = Set(d, 0x3u); // Lowest 2 bits + + const VU16 packed0 = LoadU(d, packed_in + 0 * N); + const VU16 packed1 = LoadU(d, packed_in + 1 * N); + + const VU16 raw0 = And(packed0, mask); + StoreU(raw0, d, raw + 0 * N); + + const VU16 raw1 = And(packed1, mask); + StoreU(raw1, d, raw + 1 * N); + + const VU16 raw2 = And(ShiftRight<2>(packed0), mask); + StoreU(raw2, d, raw + 2 * N); + + const VU16 raw3 = And(ShiftRight<2>(packed1), mask); + StoreU(raw3, d, raw + 3 * N); + + const VU16 raw4 = And(ShiftRight<4>(packed0), mask); + StoreU(raw4, d, raw + 4 * N); + + const VU16 raw5 = And(ShiftRight<4>(packed1), mask); + StoreU(raw5, d, raw + 5 * N); + + const VU16 raw6 = And(ShiftRight<6>(packed0), mask); + StoreU(raw6, d, raw + 6 * N); + + const VU16 raw7 = And(ShiftRight<6>(packed1), mask); + StoreU(raw7, d, raw + 7 * N); + + const VU16 raw8 = And(ShiftRight<8>(packed0), mask); + StoreU(raw8, d, raw + 8 * N); + + const VU16 raw9 = And(ShiftRight<8>(packed1), mask); + StoreU(raw9, d, raw + 9 * N); + + const VU16 rawA = And(ShiftRight<0xA>(packed0), mask); + StoreU(rawA, d, raw + 0xA * N); + + const VU16 rawB = And(ShiftRight<0xA>(packed1), mask); + StoreU(rawB, d, raw + 0xB * N); + + const VU16 rawC = And(ShiftRight<0xC>(packed0), mask); + StoreU(rawC, d, raw + 0xC * N); + + const VU16 rawD = And(ShiftRight<0xC>(packed1), mask); + StoreU(rawD, d, raw + 0xD * N); + + const VU16 rawE = ShiftRight<0xE>(packed0); + StoreU(rawE, d, raw + 0xE * N); + + const VU16 rawF = ShiftRight<0xE>(packed1); + StoreU(rawF, d, raw + 0xF * N); + } +}; // Pack16<2> + +template <> +struct Pack16<3> { + template <class D> + HWY_INLINE void Pack(D d, const uint16_t* HWY_RESTRICT raw, + uint16_t* HWY_RESTRICT packed_out) const { + using VU16 = Vec<decltype(d)>; + const size_t N = Lanes(d); + const VU16 raw0 = LoadU(d, raw + 0 * N); + const VU16 raw1 = LoadU(d, raw + 1 * N); + const VU16 raw2 = LoadU(d, raw + 2 * N); + const VU16 raw3 = LoadU(d, raw + 3 * N); + const VU16 raw4 = LoadU(d, raw + 4 * N); + const VU16 raw5 = LoadU(d, raw + 5 * N); + const VU16 raw6 = LoadU(d, raw + 6 * N); + const VU16 raw7 = LoadU(d, raw + 7 * N); + const VU16 raw8 = LoadU(d, raw + 8 * N); + const VU16 raw9 = LoadU(d, raw + 9 * N); + const VU16 rawA = LoadU(d, raw + 0xA * N); + const VU16 rawB = LoadU(d, raw + 0xB * N); + const VU16 rawC = LoadU(d, raw + 0xC * N); + const VU16 rawD = LoadU(d, raw + 0xD * N); + const VU16 rawE = LoadU(d, raw + 0xE * N); + const VU16 rawF = LoadU(d, raw + 0xF * N); + + // We can fit 15 raw vectors in three packed vectors (five each). + VU16 packed0 = Xor3(ShiftLeft<6>(raw6), ShiftLeft<3>(raw3), raw0); + VU16 packed1 = Xor3(ShiftLeft<6>(raw7), ShiftLeft<3>(raw4), raw1); + VU16 packed2 = Xor3(ShiftLeft<6>(raw8), ShiftLeft<3>(raw5), raw2); + + // rawF will be scattered into the upper bit of these three. + packed0 = Xor3(packed0, ShiftLeft<12>(rawC), ShiftLeft<9>(raw9)); + packed1 = Xor3(packed1, ShiftLeft<12>(rawD), ShiftLeft<9>(rawA)); + packed2 = Xor3(packed2, ShiftLeft<12>(rawE), ShiftLeft<9>(rawB)); + + const VU16 hi1 = Set(d, 0x8000u); + packed0 = Or(packed0, ShiftLeft<15>(rawF)); // MSB only, no mask + packed1 = OrAnd(packed1, ShiftLeft<14>(rawF), hi1); + packed2 = OrAnd(packed2, ShiftLeft<13>(rawF), hi1); + StoreU(packed0, d, packed_out + 0 * N); + StoreU(packed1, d, packed_out + 1 * N); + StoreU(packed2, d, packed_out + 2 * N); + } + + template <class D> + HWY_INLINE void Unpack(D d, const uint16_t* HWY_RESTRICT packed_in, + uint16_t* HWY_RESTRICT raw) const { + using VU16 = Vec<decltype(d)>; + const size_t N = Lanes(d); + const VU16 mask = Set(d, 0x7u); // Lowest 3 bits + + const VU16 packed0 = LoadU(d, packed_in + 0 * N); + const VU16 packed1 = LoadU(d, packed_in + 1 * N); + const VU16 packed2 = LoadU(d, packed_in + 2 * N); + + const VU16 raw0 = And(mask, packed0); + StoreU(raw0, d, raw + 0 * N); + + const VU16 raw1 = And(mask, packed1); + StoreU(raw1, d, raw + 1 * N); + + const VU16 raw2 = And(mask, packed2); + StoreU(raw2, d, raw + 2 * N); + + const VU16 raw3 = And(mask, ShiftRight<3>(packed0)); + StoreU(raw3, d, raw + 3 * N); + + const VU16 raw4 = And(mask, ShiftRight<3>(packed1)); + StoreU(raw4, d, raw + 4 * N); + + const VU16 raw5 = And(mask, ShiftRight<3>(packed2)); + StoreU(raw5, d, raw + 5 * N); + + const VU16 raw6 = And(mask, ShiftRight<6>(packed0)); + StoreU(raw6, d, raw + 6 * N); + + const VU16 raw7 = And(mask, ShiftRight<6>(packed1)); + StoreU(raw7, d, raw + 7 * N); + + const VU16 raw8 = And(mask, ShiftRight<6>(packed2)); + StoreU(raw8, d, raw + 8 * N); + + const VU16 raw9 = And(mask, ShiftRight<9>(packed0)); + StoreU(raw9, d, raw + 9 * N); + + const VU16 rawA = And(mask, ShiftRight<9>(packed1)); + StoreU(rawA, d, raw + 0xA * N); + + const VU16 rawB = And(mask, ShiftRight<9>(packed2)); + StoreU(rawB, d, raw + 0xB * N); + + const VU16 rawC = And(mask, ShiftRight<12>(packed0)); + StoreU(rawC, d, raw + 0xC * N); + + const VU16 rawD = And(mask, ShiftRight<12>(packed1)); + StoreU(rawD, d, raw + 0xD * N); + + const VU16 rawE = And(mask, ShiftRight<12>(packed2)); + StoreU(rawE, d, raw + 0xE * N); + + // rawF is the concatenation of the upper bit of packed0..2. + const VU16 down0 = ShiftRight<15>(packed0); + const VU16 down1 = ShiftRight<15>(packed1); + const VU16 down2 = ShiftRight<15>(packed2); + const VU16 rawF = Xor3(ShiftLeft<2>(down2), Add(down1, down1), down0); + StoreU(rawF, d, raw + 0xF * N); + } +}; // Pack16<3> + +template <> +struct Pack16<4> { + template <class D> + HWY_INLINE void Pack(D d, const uint16_t* HWY_RESTRICT raw, + uint16_t* HWY_RESTRICT packed_out) const { + using VU16 = Vec<decltype(d)>; + const size_t N = Lanes(d); + const VU16 raw0 = LoadU(d, raw + 0 * N); + const VU16 raw1 = LoadU(d, raw + 1 * N); + const VU16 raw2 = LoadU(d, raw + 2 * N); + const VU16 raw3 = LoadU(d, raw + 3 * N); + const VU16 raw4 = LoadU(d, raw + 4 * N); + const VU16 raw5 = LoadU(d, raw + 5 * N); + const VU16 raw6 = LoadU(d, raw + 6 * N); + const VU16 raw7 = LoadU(d, raw + 7 * N); + const VU16 raw8 = LoadU(d, raw + 8 * N); + const VU16 raw9 = LoadU(d, raw + 9 * N); + const VU16 rawA = LoadU(d, raw + 0xA * N); + const VU16 rawB = LoadU(d, raw + 0xB * N); + const VU16 rawC = LoadU(d, raw + 0xC * N); + const VU16 rawD = LoadU(d, raw + 0xD * N); + const VU16 rawE = LoadU(d, raw + 0xE * N); + const VU16 rawF = LoadU(d, raw + 0xF * N); + + VU16 packed0 = Xor3(ShiftLeft<8>(raw4), ShiftLeft<4>(raw2), raw0); + VU16 packed1 = Xor3(ShiftLeft<8>(raw5), ShiftLeft<4>(raw3), raw1); + packed0 = Or(packed0, ShiftLeft<12>(raw6)); + packed1 = Or(packed1, ShiftLeft<12>(raw7)); + VU16 packed2 = Xor3(ShiftLeft<8>(rawC), ShiftLeft<4>(rawA), raw8); + VU16 packed3 = Xor3(ShiftLeft<8>(rawD), ShiftLeft<4>(rawB), raw9); + packed2 = Or(packed2, ShiftLeft<12>(rawE)); + packed3 = Or(packed3, ShiftLeft<12>(rawF)); + + StoreU(packed0, d, packed_out + 0 * N); + StoreU(packed1, d, packed_out + 1 * N); + StoreU(packed2, d, packed_out + 2 * N); + StoreU(packed3, d, packed_out + 3 * N); + } + + template <class D> + HWY_INLINE void Unpack(D d, const uint16_t* HWY_RESTRICT packed_in, + uint16_t* HWY_RESTRICT raw) const { + using VU16 = Vec<decltype(d)>; + const size_t N = Lanes(d); + const VU16 mask = Set(d, 0xFu); // Lowest 4 bits + + const VU16 packed0 = LoadU(d, packed_in + 0 * N); + const VU16 packed1 = LoadU(d, packed_in + 1 * N); + const VU16 packed2 = LoadU(d, packed_in + 2 * N); + const VU16 packed3 = LoadU(d, packed_in + 3 * N); + + const VU16 raw0 = And(packed0, mask); + StoreU(raw0, d, raw + 0 * N); + + const VU16 raw1 = And(packed1, mask); + StoreU(raw1, d, raw + 1 * N); + + const VU16 raw2 = And(ShiftRight<4>(packed0), mask); + StoreU(raw2, d, raw + 2 * N); + + const VU16 raw3 = And(ShiftRight<4>(packed1), mask); + StoreU(raw3, d, raw + 3 * N); + + const VU16 raw4 = And(ShiftRight<8>(packed0), mask); + StoreU(raw4, d, raw + 4 * N); + + const VU16 raw5 = And(ShiftRight<8>(packed1), mask); + StoreU(raw5, d, raw + 5 * N); + + const VU16 raw6 = ShiftRight<12>(packed0); // no mask required + StoreU(raw6, d, raw + 6 * N); + + const VU16 raw7 = ShiftRight<12>(packed1); // no mask required + StoreU(raw7, d, raw + 7 * N); + + const VU16 raw8 = And(packed2, mask); + StoreU(raw8, d, raw + 8 * N); + + const VU16 raw9 = And(packed3, mask); + StoreU(raw9, d, raw + 9 * N); + + const VU16 rawA = And(ShiftRight<4>(packed2), mask); + StoreU(rawA, d, raw + 0xA * N); + + const VU16 rawB = And(ShiftRight<4>(packed3), mask); + StoreU(rawB, d, raw + 0xB * N); + + const VU16 rawC = And(ShiftRight<8>(packed2), mask); + StoreU(rawC, d, raw + 0xC * N); + + const VU16 rawD = And(ShiftRight<8>(packed3), mask); + StoreU(rawD, d, raw + 0xD * N); + + const VU16 rawE = ShiftRight<12>(packed2); // no mask required + StoreU(rawE, d, raw + 0xE * N); + + const VU16 rawF = ShiftRight<12>(packed3); // no mask required + StoreU(rawF, d, raw + 0xF * N); + } +}; // Pack16<4> + +template <> +struct Pack16<5> { + template <class D> + HWY_INLINE void Pack(D d, const uint16_t* HWY_RESTRICT raw, + uint16_t* HWY_RESTRICT packed_out) const { + using VU16 = Vec<decltype(d)>; + const size_t N = Lanes(d); + const VU16 raw0 = LoadU(d, raw + 0 * N); + const VU16 raw1 = LoadU(d, raw + 1 * N); + const VU16 raw2 = LoadU(d, raw + 2 * N); + const VU16 raw3 = LoadU(d, raw + 3 * N); + const VU16 raw4 = LoadU(d, raw + 4 * N); + const VU16 raw5 = LoadU(d, raw + 5 * N); + const VU16 raw6 = LoadU(d, raw + 6 * N); + const VU16 raw7 = LoadU(d, raw + 7 * N); + const VU16 raw8 = LoadU(d, raw + 8 * N); + const VU16 raw9 = LoadU(d, raw + 9 * N); + const VU16 rawA = LoadU(d, raw + 0xA * N); + const VU16 rawB = LoadU(d, raw + 0xB * N); + const VU16 rawC = LoadU(d, raw + 0xC * N); + const VU16 rawD = LoadU(d, raw + 0xD * N); + const VU16 rawE = LoadU(d, raw + 0xE * N); + const VU16 rawF = LoadU(d, raw + 0xF * N); + + // We can fit 15 raw vectors in five packed vectors (three each). + VU16 packed0 = Xor3(ShiftLeft<10>(rawA), ShiftLeft<5>(raw5), raw0); + VU16 packed1 = Xor3(ShiftLeft<10>(rawB), ShiftLeft<5>(raw6), raw1); + VU16 packed2 = Xor3(ShiftLeft<10>(rawC), ShiftLeft<5>(raw7), raw2); + VU16 packed3 = Xor3(ShiftLeft<10>(rawD), ShiftLeft<5>(raw8), raw3); + VU16 packed4 = Xor3(ShiftLeft<10>(rawE), ShiftLeft<5>(raw9), raw4); + + // rawF will be scattered into the upper bits of these five. + const VU16 hi1 = Set(d, 0x8000u); + packed0 = Or(packed0, ShiftLeft<15>(rawF)); // MSB only, no mask + packed1 = OrAnd(packed1, ShiftLeft<14>(rawF), hi1); + packed2 = OrAnd(packed2, ShiftLeft<13>(rawF), hi1); + packed3 = OrAnd(packed3, ShiftLeft<12>(rawF), hi1); + packed4 = OrAnd(packed4, ShiftLeft<11>(rawF), hi1); + + StoreU(packed0, d, packed_out + 0 * N); + StoreU(packed1, d, packed_out + 1 * N); + StoreU(packed2, d, packed_out + 2 * N); + StoreU(packed3, d, packed_out + 3 * N); + StoreU(packed4, d, packed_out + 4 * N); + } + + template <class D> + HWY_INLINE void Unpack(D d, const uint16_t* HWY_RESTRICT packed_in, + uint16_t* HWY_RESTRICT raw) const { + using VU16 = Vec<decltype(d)>; + const size_t N = Lanes(d); + + const VU16 packed0 = LoadU(d, packed_in + 0 * N); + const VU16 packed1 = LoadU(d, packed_in + 1 * N); + const VU16 packed2 = LoadU(d, packed_in + 2 * N); + const VU16 packed3 = LoadU(d, packed_in + 3 * N); + const VU16 packed4 = LoadU(d, packed_in + 4 * N); + + const VU16 mask = Set(d, 0x1Fu); // Lowest 5 bits + + const VU16 raw0 = And(packed0, mask); + StoreU(raw0, d, raw + 0 * N); + + const VU16 raw1 = And(packed1, mask); + StoreU(raw1, d, raw + 1 * N); + + const VU16 raw2 = And(packed2, mask); + StoreU(raw2, d, raw + 2 * N); + + const VU16 raw3 = And(packed3, mask); + StoreU(raw3, d, raw + 3 * N); + + const VU16 raw4 = And(packed4, mask); + StoreU(raw4, d, raw + 4 * N); + + const VU16 raw5 = And(ShiftRight<5>(packed0), mask); + StoreU(raw5, d, raw + 5 * N); + + const VU16 raw6 = And(ShiftRight<5>(packed1), mask); + StoreU(raw6, d, raw + 6 * N); + + const VU16 raw7 = And(ShiftRight<5>(packed2), mask); + StoreU(raw7, d, raw + 7 * N); + + const VU16 raw8 = And(ShiftRight<5>(packed3), mask); + StoreU(raw8, d, raw + 8 * N); + + const VU16 raw9 = And(ShiftRight<5>(packed4), mask); + StoreU(raw9, d, raw + 9 * N); + + const VU16 rawA = And(ShiftRight<10>(packed0), mask); + StoreU(rawA, d, raw + 0xA * N); + + const VU16 rawB = And(ShiftRight<10>(packed1), mask); + StoreU(rawB, d, raw + 0xB * N); + + const VU16 rawC = And(ShiftRight<10>(packed2), mask); + StoreU(rawC, d, raw + 0xC * N); + + const VU16 rawD = And(ShiftRight<10>(packed3), mask); + StoreU(rawD, d, raw + 0xD * N); + + const VU16 rawE = And(ShiftRight<10>(packed4), mask); + StoreU(rawE, d, raw + 0xE * N); + + // rawF is the concatenation of the lower bit of packed0..4. + const VU16 down0 = ShiftRight<15>(packed0); + const VU16 down1 = ShiftRight<15>(packed1); + const VU16 hi1 = Set(d, 0x8000u); + const VU16 p0 = + Xor3(ShiftRight<13>(And(packed2, hi1)), Add(down1, down1), down0); + const VU16 rawF = Xor3(ShiftRight<11>(And(packed4, hi1)), + ShiftRight<12>(And(packed3, hi1)), p0); + StoreU(rawF, d, raw + 0xF * N); + } +}; // Pack16<5> + +template <> +struct Pack16<6> { + template <class D> + HWY_INLINE void Pack(D d, const uint16_t* HWY_RESTRICT raw, + uint16_t* HWY_RESTRICT packed_out) const { + using VU16 = Vec<decltype(d)>; + const size_t N = Lanes(d); + const VU16 raw0 = LoadU(d, raw + 0 * N); + const VU16 raw1 = LoadU(d, raw + 1 * N); + const VU16 raw2 = LoadU(d, raw + 2 * N); + const VU16 raw3 = LoadU(d, raw + 3 * N); + const VU16 raw4 = LoadU(d, raw + 4 * N); + const VU16 raw5 = LoadU(d, raw + 5 * N); + const VU16 raw6 = LoadU(d, raw + 6 * N); + const VU16 raw7 = LoadU(d, raw + 7 * N); + const VU16 raw8 = LoadU(d, raw + 8 * N); + const VU16 raw9 = LoadU(d, raw + 9 * N); + const VU16 rawA = LoadU(d, raw + 0xA * N); + const VU16 rawB = LoadU(d, raw + 0xB * N); + const VU16 rawC = LoadU(d, raw + 0xC * N); + const VU16 rawD = LoadU(d, raw + 0xD * N); + const VU16 rawE = LoadU(d, raw + 0xE * N); + const VU16 rawF = LoadU(d, raw + 0xF * N); + + const VU16 packed3 = Or(ShiftLeft<6>(raw7), raw3); + const VU16 packed7 = Or(ShiftLeft<6>(rawF), rawB); + // Three vectors, two 6-bit raw each; packed3 (12 bits) is spread over the + // four remainder bits at the top of each vector. + const VU16 packed0 = Xor3(ShiftLeft<12>(packed3), ShiftLeft<6>(raw4), raw0); + VU16 packed1 = Or(ShiftLeft<6>(raw5), raw1); + VU16 packed2 = Or(ShiftLeft<6>(raw6), raw2); + const VU16 packed4 = Xor3(ShiftLeft<12>(packed7), ShiftLeft<6>(rawC), raw8); + VU16 packed5 = Or(ShiftLeft<6>(rawD), raw9); + VU16 packed6 = Or(ShiftLeft<6>(rawE), rawA); + + const VU16 hi4 = Set(d, 0xF000u); + packed1 = OrAnd(packed1, ShiftLeft<8>(packed3), hi4); + packed2 = OrAnd(packed2, ShiftLeft<4>(packed3), hi4); + packed5 = OrAnd(packed5, ShiftLeft<8>(packed7), hi4); + packed6 = OrAnd(packed6, ShiftLeft<4>(packed7), hi4); + + StoreU(packed0, d, packed_out + 0 * N); + StoreU(packed1, d, packed_out + 1 * N); + StoreU(packed2, d, packed_out + 2 * N); + StoreU(packed4, d, packed_out + 3 * N); + StoreU(packed5, d, packed_out + 4 * N); + StoreU(packed6, d, packed_out + 5 * N); + } + + template <class D> + HWY_INLINE void Unpack(D d, const uint16_t* HWY_RESTRICT packed_in, + uint16_t* HWY_RESTRICT raw) const { + using VU16 = Vec<decltype(d)>; + const size_t N = Lanes(d); + const VU16 mask = Set(d, 0x3Fu); // Lowest 6 bits + + const VU16 packed0 = LoadU(d, packed_in + 0 * N); + const VU16 packed1 = LoadU(d, packed_in + 1 * N); + const VU16 packed2 = LoadU(d, packed_in + 2 * N); + const VU16 packed4 = LoadU(d, packed_in + 3 * N); + const VU16 packed5 = LoadU(d, packed_in + 4 * N); + const VU16 packed6 = LoadU(d, packed_in + 5 * N); + + const VU16 raw0 = And(packed0, mask); + StoreU(raw0, d, raw + 0 * N); + + const VU16 raw1 = And(packed1, mask); + StoreU(raw1, d, raw + 1 * N); + + const VU16 raw2 = And(packed2, mask); + StoreU(raw2, d, raw + 2 * N); + + const VU16 raw4 = And(ShiftRight<6>(packed0), mask); + StoreU(raw4, d, raw + 4 * N); + + const VU16 raw5 = And(ShiftRight<6>(packed1), mask); + StoreU(raw5, d, raw + 5 * N); + + const VU16 raw6 = And(ShiftRight<6>(packed2), mask); + StoreU(raw6, d, raw + 6 * N); + + const VU16 raw8 = And(packed4, mask); + StoreU(raw8, d, raw + 8 * N); + + const VU16 raw9 = And(packed5, mask); + StoreU(raw9, d, raw + 9 * N); + + const VU16 rawA = And(packed6, mask); + StoreU(rawA, d, raw + 0xA * N); + + const VU16 rawC = And(ShiftRight<6>(packed4), mask); + StoreU(rawC, d, raw + 0xC * N); + + const VU16 rawD = And(ShiftRight<6>(packed5), mask); + StoreU(rawD, d, raw + 0xD * N); + + const VU16 rawE = And(ShiftRight<6>(packed6), mask); + StoreU(rawE, d, raw + 0xE * N); + + // packed3 is the concatenation of the four upper bits in packed0..2. + const VU16 down0 = ShiftRight<12>(packed0); + const VU16 down4 = ShiftRight<12>(packed4); + const VU16 hi4 = Set(d, 0xF000u); + const VU16 packed3 = Xor3(ShiftRight<4>(And(packed2, hi4)), + ShiftRight<8>(And(packed1, hi4)), down0); + const VU16 packed7 = Xor3(ShiftRight<4>(And(packed6, hi4)), + ShiftRight<8>(And(packed5, hi4)), down4); + const VU16 raw3 = And(packed3, mask); + StoreU(raw3, d, raw + 3 * N); + + const VU16 rawB = And(packed7, mask); + StoreU(rawB, d, raw + 0xB * N); + + const VU16 raw7 = ShiftRight<6>(packed3); // upper bits already zero + StoreU(raw7, d, raw + 7 * N); + + const VU16 rawF = ShiftRight<6>(packed7); // upper bits already zero + StoreU(rawF, d, raw + 0xF * N); + } +}; // Pack16<6> + +template <> +struct Pack16<7> { + template <class D> + HWY_INLINE void Pack(D d, const uint16_t* HWY_RESTRICT raw, + uint16_t* HWY_RESTRICT packed_out) const { + using VU16 = Vec<decltype(d)>; + const size_t N = Lanes(d); + const VU16 raw0 = LoadU(d, raw + 0 * N); + const VU16 raw1 = LoadU(d, raw + 1 * N); + const VU16 raw2 = LoadU(d, raw + 2 * N); + const VU16 raw3 = LoadU(d, raw + 3 * N); + const VU16 raw4 = LoadU(d, raw + 4 * N); + const VU16 raw5 = LoadU(d, raw + 5 * N); + const VU16 raw6 = LoadU(d, raw + 6 * N); + const VU16 raw7 = LoadU(d, raw + 7 * N); + const VU16 raw8 = LoadU(d, raw + 8 * N); + const VU16 raw9 = LoadU(d, raw + 9 * N); + const VU16 rawA = LoadU(d, raw + 0xA * N); + const VU16 rawB = LoadU(d, raw + 0xB * N); + const VU16 rawC = LoadU(d, raw + 0xC * N); + const VU16 rawD = LoadU(d, raw + 0xD * N); + const VU16 rawE = LoadU(d, raw + 0xE * N); + const VU16 rawF = LoadU(d, raw + 0xF * N); + + const VU16 packed7 = Or(ShiftLeft<7>(rawF), raw7); + // Seven vectors, two 7-bit raw each; packed7 (14 bits) is spread over the + // two remainder bits at the top of each vector. + const VU16 packed0 = Xor3(ShiftLeft<14>(packed7), ShiftLeft<7>(raw8), raw0); + VU16 packed1 = Or(ShiftLeft<7>(raw9), raw1); + VU16 packed2 = Or(ShiftLeft<7>(rawA), raw2); + VU16 packed3 = Or(ShiftLeft<7>(rawB), raw3); + VU16 packed4 = Or(ShiftLeft<7>(rawC), raw4); + VU16 packed5 = Or(ShiftLeft<7>(rawD), raw5); + VU16 packed6 = Or(ShiftLeft<7>(rawE), raw6); + + const VU16 hi2 = Set(d, 0xC000u); + packed1 = OrAnd(packed1, ShiftLeft<12>(packed7), hi2); + packed2 = OrAnd(packed2, ShiftLeft<10>(packed7), hi2); + packed3 = OrAnd(packed3, ShiftLeft<8>(packed7), hi2); + packed4 = OrAnd(packed4, ShiftLeft<6>(packed7), hi2); + packed5 = OrAnd(packed5, ShiftLeft<4>(packed7), hi2); + packed6 = OrAnd(packed6, ShiftLeft<2>(packed7), hi2); + + StoreU(packed0, d, packed_out + 0 * N); + StoreU(packed1, d, packed_out + 1 * N); + StoreU(packed2, d, packed_out + 2 * N); + StoreU(packed3, d, packed_out + 3 * N); + StoreU(packed4, d, packed_out + 4 * N); + StoreU(packed5, d, packed_out + 5 * N); + StoreU(packed6, d, packed_out + 6 * N); + } + + template <class D> + HWY_INLINE void Unpack(D d, const uint16_t* HWY_RESTRICT packed_in, + uint16_t* HWY_RESTRICT raw) const { + using VU16 = Vec<decltype(d)>; + const size_t N = Lanes(d); + + const VU16 packed0 = BitCast(d, LoadU(d, packed_in + 0 * N)); + const VU16 packed1 = BitCast(d, LoadU(d, packed_in + 1 * N)); + const VU16 packed2 = BitCast(d, LoadU(d, packed_in + 2 * N)); + const VU16 packed3 = BitCast(d, LoadU(d, packed_in + 3 * N)); + const VU16 packed4 = BitCast(d, LoadU(d, packed_in + 4 * N)); + const VU16 packed5 = BitCast(d, LoadU(d, packed_in + 5 * N)); + const VU16 packed6 = BitCast(d, LoadU(d, packed_in + 6 * N)); + + const VU16 mask = Set(d, 0x7Fu); // Lowest 7 bits + + const VU16 raw0 = And(packed0, mask); + StoreU(raw0, d, raw + 0 * N); + + const VU16 raw1 = And(packed1, mask); + StoreU(raw1, d, raw + 1 * N); + + const VU16 raw2 = And(packed2, mask); + StoreU(raw2, d, raw + 2 * N); + + const VU16 raw3 = And(packed3, mask); + StoreU(raw3, d, raw + 3 * N); + + const VU16 raw4 = And(packed4, mask); + StoreU(raw4, d, raw + 4 * N); + + const VU16 raw5 = And(packed5, mask); + StoreU(raw5, d, raw + 5 * N); + + const VU16 raw6 = And(packed6, mask); + StoreU(raw6, d, raw + 6 * N); + + const VU16 raw8 = And(ShiftRight<7>(packed0), mask); + StoreU(raw8, d, raw + 8 * N); + + const VU16 raw9 = And(ShiftRight<7>(packed1), mask); + StoreU(raw9, d, raw + 9 * N); + + const VU16 rawA = And(ShiftRight<7>(packed2), mask); + StoreU(rawA, d, raw + 0xA * N); + + const VU16 rawB = And(ShiftRight<7>(packed3), mask); + StoreU(rawB, d, raw + 0xB * N); + + const VU16 rawC = And(ShiftRight<7>(packed4), mask); + StoreU(rawC, d, raw + 0xC * N); + + const VU16 rawD = And(ShiftRight<7>(packed5), mask); + StoreU(rawD, d, raw + 0xD * N); + + const VU16 rawE = And(ShiftRight<7>(packed6), mask); + StoreU(rawE, d, raw + 0xE * N); + + // packed7 is the concatenation of the two upper bits in packed0..6. + const VU16 down0 = ShiftRight<14>(packed0); + const VU16 hi2 = Set(d, 0xC000u); + const VU16 p0 = Xor3(ShiftRight<12>(And(packed1, hi2)), + ShiftRight<10>(And(packed2, hi2)), down0); + const VU16 p1 = Xor3(ShiftRight<8>(And(packed3, hi2)), // + ShiftRight<6>(And(packed4, hi2)), + ShiftRight<4>(And(packed5, hi2))); + const VU16 packed7 = Xor3(ShiftRight<2>(And(packed6, hi2)), p1, p0); + + const VU16 raw7 = And(packed7, mask); + StoreU(raw7, d, raw + 7 * N); + + const VU16 rawF = ShiftRight<7>(packed7); // upper bits already zero + StoreU(rawF, d, raw + 0xF * N); + } +}; // Pack16<7> + +template <> +struct Pack16<8> { + template <class D> + HWY_INLINE void Pack(D d, const uint16_t* HWY_RESTRICT raw, + uint16_t* HWY_RESTRICT packed_out) const { + using VU16 = Vec<decltype(d)>; + const size_t N = Lanes(d); + const VU16 raw0 = LoadU(d, raw + 0 * N); + const VU16 raw1 = LoadU(d, raw + 1 * N); + const VU16 raw2 = LoadU(d, raw + 2 * N); + const VU16 raw3 = LoadU(d, raw + 3 * N); + const VU16 raw4 = LoadU(d, raw + 4 * N); + const VU16 raw5 = LoadU(d, raw + 5 * N); + const VU16 raw6 = LoadU(d, raw + 6 * N); + const VU16 raw7 = LoadU(d, raw + 7 * N); + const VU16 raw8 = LoadU(d, raw + 8 * N); + const VU16 raw9 = LoadU(d, raw + 9 * N); + const VU16 rawA = LoadU(d, raw + 0xA * N); + const VU16 rawB = LoadU(d, raw + 0xB * N); + const VU16 rawC = LoadU(d, raw + 0xC * N); + const VU16 rawD = LoadU(d, raw + 0xD * N); + const VU16 rawE = LoadU(d, raw + 0xE * N); + const VU16 rawF = LoadU(d, raw + 0xF * N); + + // This is equivalent to ConcatEven with 8-bit lanes, but much more + // efficient on RVV and slightly less efficient on SVE2. + const VU16 packed0 = Or(ShiftLeft<8>(raw2), raw0); + const VU16 packed1 = Or(ShiftLeft<8>(raw3), raw1); + const VU16 packed2 = Or(ShiftLeft<8>(raw6), raw4); + const VU16 packed3 = Or(ShiftLeft<8>(raw7), raw5); + const VU16 packed4 = Or(ShiftLeft<8>(rawA), raw8); + const VU16 packed5 = Or(ShiftLeft<8>(rawB), raw9); + const VU16 packed6 = Or(ShiftLeft<8>(rawE), rawC); + const VU16 packed7 = Or(ShiftLeft<8>(rawF), rawD); + + StoreU(packed0, d, packed_out + 0 * N); + StoreU(packed1, d, packed_out + 1 * N); + StoreU(packed2, d, packed_out + 2 * N); + StoreU(packed3, d, packed_out + 3 * N); + StoreU(packed4, d, packed_out + 4 * N); + StoreU(packed5, d, packed_out + 5 * N); + StoreU(packed6, d, packed_out + 6 * N); + StoreU(packed7, d, packed_out + 7 * N); + } + + template <class D> + HWY_INLINE void Unpack(D d, const uint16_t* HWY_RESTRICT packed_in, + uint16_t* HWY_RESTRICT raw) const { + using VU16 = Vec<decltype(d)>; + const size_t N = Lanes(d); + + const VU16 packed0 = BitCast(d, LoadU(d, packed_in + 0 * N)); + const VU16 packed1 = BitCast(d, LoadU(d, packed_in + 1 * N)); + const VU16 packed2 = BitCast(d, LoadU(d, packed_in + 2 * N)); + const VU16 packed3 = BitCast(d, LoadU(d, packed_in + 3 * N)); + const VU16 packed4 = BitCast(d, LoadU(d, packed_in + 4 * N)); + const VU16 packed5 = BitCast(d, LoadU(d, packed_in + 5 * N)); + const VU16 packed6 = BitCast(d, LoadU(d, packed_in + 6 * N)); + const VU16 packed7 = BitCast(d, LoadU(d, packed_in + 7 * N)); + const VU16 mask = Set(d, 0xFFu); // Lowest 8 bits + + const VU16 raw0 = And(packed0, mask); + StoreU(raw0, d, raw + 0 * N); + + const VU16 raw1 = And(packed1, mask); + StoreU(raw1, d, raw + 1 * N); + + const VU16 raw2 = ShiftRight<8>(packed0); // upper bits already zero + StoreU(raw2, d, raw + 2 * N); + + const VU16 raw3 = ShiftRight<8>(packed1); // upper bits already zero + StoreU(raw3, d, raw + 3 * N); + + const VU16 raw4 = And(packed2, mask); + StoreU(raw4, d, raw + 4 * N); + + const VU16 raw5 = And(packed3, mask); + StoreU(raw5, d, raw + 5 * N); + + const VU16 raw6 = ShiftRight<8>(packed2); // upper bits already zero + StoreU(raw6, d, raw + 6 * N); + + const VU16 raw7 = ShiftRight<8>(packed3); // upper bits already zero + StoreU(raw7, d, raw + 7 * N); + + const VU16 raw8 = And(packed4, mask); + StoreU(raw8, d, raw + 8 * N); + + const VU16 raw9 = And(packed5, mask); + StoreU(raw9, d, raw + 9 * N); + + const VU16 rawA = ShiftRight<8>(packed4); // upper bits already zero + StoreU(rawA, d, raw + 0xA * N); + + const VU16 rawB = ShiftRight<8>(packed5); // upper bits already zero + StoreU(rawB, d, raw + 0xB * N); + + const VU16 rawC = And(packed6, mask); + StoreU(rawC, d, raw + 0xC * N); + + const VU16 rawD = And(packed7, mask); + StoreU(rawD, d, raw + 0xD * N); + + const VU16 rawE = ShiftRight<8>(packed6); // upper bits already zero + StoreU(rawE, d, raw + 0xE * N); + + const VU16 rawF = ShiftRight<8>(packed7); // upper bits already zero + StoreU(rawF, d, raw + 0xF * N); + } +}; // Pack16<8> + +template <> +struct Pack16<9> { + template <class D> + HWY_INLINE void Pack(D d, const uint16_t* HWY_RESTRICT raw, + uint16_t* HWY_RESTRICT packed_out) const { + using VU16 = Vec<decltype(d)>; + const size_t N = Lanes(d); + const VU16 raw0 = LoadU(d, raw + 0 * N); + const VU16 raw1 = LoadU(d, raw + 1 * N); + const VU16 raw2 = LoadU(d, raw + 2 * N); + const VU16 raw3 = LoadU(d, raw + 3 * N); + const VU16 raw4 = LoadU(d, raw + 4 * N); + const VU16 raw5 = LoadU(d, raw + 5 * N); + const VU16 raw6 = LoadU(d, raw + 6 * N); + const VU16 raw7 = LoadU(d, raw + 7 * N); + const VU16 raw8 = LoadU(d, raw + 8 * N); + const VU16 raw9 = LoadU(d, raw + 9 * N); + const VU16 rawA = LoadU(d, raw + 0xA * N); + const VU16 rawB = LoadU(d, raw + 0xB * N); + const VU16 rawC = LoadU(d, raw + 0xC * N); + const VU16 rawD = LoadU(d, raw + 0xD * N); + const VU16 rawE = LoadU(d, raw + 0xE * N); + const VU16 rawF = LoadU(d, raw + 0xF * N); + // 8 vectors, each with 9+7 bits; top 2 bits are concatenated into packed8. + const VU16 packed0 = Or(ShiftLeft<9>(raw8), raw0); + const VU16 packed1 = Or(ShiftLeft<9>(raw9), raw1); + const VU16 packed2 = Or(ShiftLeft<9>(rawA), raw2); + const VU16 packed3 = Or(ShiftLeft<9>(rawB), raw3); + const VU16 packed4 = Or(ShiftLeft<9>(rawC), raw4); + const VU16 packed5 = Or(ShiftLeft<9>(rawD), raw5); + const VU16 packed6 = Or(ShiftLeft<9>(rawE), raw6); + const VU16 packed7 = Or(ShiftLeft<9>(rawF), raw7); + + // We could shift down, OR and shift up, but two shifts are typically more + // expensive than AND, shift into position, and OR (which can be further + // reduced via Xor3). + const VU16 mid2 = Set(d, 0x180u); // top 2 in lower 9 + const VU16 part8 = ShiftRight<7>(And(raw8, mid2)); + const VU16 part9 = ShiftRight<5>(And(raw9, mid2)); + const VU16 partA = ShiftRight<3>(And(rawA, mid2)); + const VU16 partB = ShiftRight<1>(And(rawB, mid2)); + const VU16 partC = ShiftLeft<1>(And(rawC, mid2)); + const VU16 partD = ShiftLeft<3>(And(rawD, mid2)); + const VU16 partE = ShiftLeft<5>(And(rawE, mid2)); + const VU16 partF = ShiftLeft<7>(And(rawF, mid2)); + const VU16 packed8 = Xor3(Xor3(part8, part9, partA), + Xor3(partB, partC, partD), Or(partE, partF)); + + StoreU(packed0, d, packed_out + 0 * N); + StoreU(packed1, d, packed_out + 1 * N); + StoreU(packed2, d, packed_out + 2 * N); + StoreU(packed3, d, packed_out + 3 * N); + StoreU(packed4, d, packed_out + 4 * N); + StoreU(packed5, d, packed_out + 5 * N); + StoreU(packed6, d, packed_out + 6 * N); + StoreU(packed7, d, packed_out + 7 * N); + StoreU(packed8, d, packed_out + 8 * N); + } + + template <class D> + HWY_INLINE void Unpack(D d, const uint16_t* HWY_RESTRICT packed_in, + uint16_t* HWY_RESTRICT raw) const { + using VU16 = Vec<decltype(d)>; + const size_t N = Lanes(d); + + const VU16 packed0 = BitCast(d, LoadU(d, packed_in + 0 * N)); + const VU16 packed1 = BitCast(d, LoadU(d, packed_in + 1 * N)); + const VU16 packed2 = BitCast(d, LoadU(d, packed_in + 2 * N)); + const VU16 packed3 = BitCast(d, LoadU(d, packed_in + 3 * N)); + const VU16 packed4 = BitCast(d, LoadU(d, packed_in + 4 * N)); + const VU16 packed5 = BitCast(d, LoadU(d, packed_in + 5 * N)); + const VU16 packed6 = BitCast(d, LoadU(d, packed_in + 6 * N)); + const VU16 packed7 = BitCast(d, LoadU(d, packed_in + 7 * N)); + const VU16 packed8 = BitCast(d, LoadU(d, packed_in + 8 * N)); + + const VU16 mask = Set(d, 0x1FFu); // Lowest 9 bits + + const VU16 raw0 = And(packed0, mask); + StoreU(raw0, d, raw + 0 * N); + + const VU16 raw1 = And(packed1, mask); + StoreU(raw1, d, raw + 1 * N); + + const VU16 raw2 = And(packed2, mask); + StoreU(raw2, d, raw + 2 * N); + + const VU16 raw3 = And(packed3, mask); + StoreU(raw3, d, raw + 3 * N); + + const VU16 raw4 = And(packed4, mask); + StoreU(raw4, d, raw + 4 * N); + + const VU16 raw5 = And(packed5, mask); + StoreU(raw5, d, raw + 5 * N); + + const VU16 raw6 = And(packed6, mask); + StoreU(raw6, d, raw + 6 * N); + + const VU16 raw7 = And(packed7, mask); + StoreU(raw7, d, raw + 7 * N); + + const VU16 mid2 = Set(d, 0x180u); // top 2 in lower 9 + const VU16 raw8 = + OrAnd(ShiftRight<9>(packed0), ShiftLeft<7>(packed8), mid2); + const VU16 raw9 = + OrAnd(ShiftRight<9>(packed1), ShiftLeft<5>(packed8), mid2); + const VU16 rawA = + OrAnd(ShiftRight<9>(packed2), ShiftLeft<3>(packed8), mid2); + const VU16 rawB = + OrAnd(ShiftRight<9>(packed3), ShiftLeft<1>(packed8), mid2); + const VU16 rawC = + OrAnd(ShiftRight<9>(packed4), ShiftRight<1>(packed8), mid2); + const VU16 rawD = + OrAnd(ShiftRight<9>(packed5), ShiftRight<3>(packed8), mid2); + const VU16 rawE = + OrAnd(ShiftRight<9>(packed6), ShiftRight<5>(packed8), mid2); + const VU16 rawF = + OrAnd(ShiftRight<9>(packed7), ShiftRight<7>(packed8), mid2); + + StoreU(raw8, d, raw + 8 * N); + StoreU(raw9, d, raw + 9 * N); + StoreU(rawA, d, raw + 0xA * N); + StoreU(rawB, d, raw + 0xB * N); + StoreU(rawC, d, raw + 0xC * N); + StoreU(rawD, d, raw + 0xD * N); + StoreU(rawE, d, raw + 0xE * N); + StoreU(rawF, d, raw + 0xF * N); + } +}; // Pack16<9> + +template <> +struct Pack16<10> { + template <class D> + HWY_INLINE void Pack(D d, const uint16_t* HWY_RESTRICT raw, + uint16_t* HWY_RESTRICT packed_out) const { + using VU16 = Vec<decltype(d)>; + const size_t N = Lanes(d); + const VU16 raw0 = LoadU(d, raw + 0 * N); + const VU16 raw1 = LoadU(d, raw + 1 * N); + const VU16 raw2 = LoadU(d, raw + 2 * N); + const VU16 raw3 = LoadU(d, raw + 3 * N); + const VU16 raw4 = LoadU(d, raw + 4 * N); + const VU16 raw5 = LoadU(d, raw + 5 * N); + const VU16 raw6 = LoadU(d, raw + 6 * N); + const VU16 raw7 = LoadU(d, raw + 7 * N); + const VU16 raw8 = LoadU(d, raw + 8 * N); + const VU16 raw9 = LoadU(d, raw + 9 * N); + const VU16 rawA = LoadU(d, raw + 0xA * N); + const VU16 rawB = LoadU(d, raw + 0xB * N); + const VU16 rawC = LoadU(d, raw + 0xC * N); + const VU16 rawD = LoadU(d, raw + 0xD * N); + const VU16 rawE = LoadU(d, raw + 0xE * N); + const VU16 rawF = LoadU(d, raw + 0xF * N); + + // 8 vectors, each with 10+6 bits; top 4 bits are concatenated into + // packed8 and packed9. + const VU16 packed0 = Or(ShiftLeft<10>(raw8), raw0); + const VU16 packed1 = Or(ShiftLeft<10>(raw9), raw1); + const VU16 packed2 = Or(ShiftLeft<10>(rawA), raw2); + const VU16 packed3 = Or(ShiftLeft<10>(rawB), raw3); + const VU16 packed4 = Or(ShiftLeft<10>(rawC), raw4); + const VU16 packed5 = Or(ShiftLeft<10>(rawD), raw5); + const VU16 packed6 = Or(ShiftLeft<10>(rawE), raw6); + const VU16 packed7 = Or(ShiftLeft<10>(rawF), raw7); + + // We could shift down, OR and shift up, but two shifts are typically more + // expensive than AND, shift into position, and OR (which can be further + // reduced via Xor3). + const VU16 mid4 = Set(d, 0x3C0u); // top 4 in lower 10 + const VU16 part8 = ShiftRight<6>(And(raw8, mid4)); + const VU16 part9 = ShiftRight<2>(And(raw9, mid4)); + const VU16 partA = ShiftLeft<2>(And(rawA, mid4)); + const VU16 partB = ShiftLeft<6>(And(rawB, mid4)); + const VU16 partC = ShiftRight<6>(And(rawC, mid4)); + const VU16 partD = ShiftRight<2>(And(rawD, mid4)); + const VU16 partE = ShiftLeft<2>(And(rawE, mid4)); + const VU16 partF = ShiftLeft<6>(And(rawF, mid4)); + const VU16 packed8 = Or(Xor3(part8, part9, partA), partB); + const VU16 packed9 = Or(Xor3(partC, partD, partE), partF); + + StoreU(packed0, d, packed_out + 0 * N); + StoreU(packed1, d, packed_out + 1 * N); + StoreU(packed2, d, packed_out + 2 * N); + StoreU(packed3, d, packed_out + 3 * N); + StoreU(packed4, d, packed_out + 4 * N); + StoreU(packed5, d, packed_out + 5 * N); + StoreU(packed6, d, packed_out + 6 * N); + StoreU(packed7, d, packed_out + 7 * N); + StoreU(packed8, d, packed_out + 8 * N); + StoreU(packed9, d, packed_out + 9 * N); + } + + template <class D> + HWY_INLINE void Unpack(D d, const uint16_t* HWY_RESTRICT packed_in, + uint16_t* HWY_RESTRICT raw) const { + using VU16 = Vec<decltype(d)>; + const size_t N = Lanes(d); + + const VU16 packed0 = BitCast(d, LoadU(d, packed_in + 0 * N)); + const VU16 packed1 = BitCast(d, LoadU(d, packed_in + 1 * N)); + const VU16 packed2 = BitCast(d, LoadU(d, packed_in + 2 * N)); + const VU16 packed3 = BitCast(d, LoadU(d, packed_in + 3 * N)); + const VU16 packed4 = BitCast(d, LoadU(d, packed_in + 4 * N)); + const VU16 packed5 = BitCast(d, LoadU(d, packed_in + 5 * N)); + const VU16 packed6 = BitCast(d, LoadU(d, packed_in + 6 * N)); + const VU16 packed7 = BitCast(d, LoadU(d, packed_in + 7 * N)); + const VU16 packed8 = BitCast(d, LoadU(d, packed_in + 8 * N)); + const VU16 packed9 = BitCast(d, LoadU(d, packed_in + 9 * N)); + + const VU16 mask = Set(d, 0x3FFu); // Lowest 10 bits + + const VU16 raw0 = And(packed0, mask); + StoreU(raw0, d, raw + 0 * N); + + const VU16 raw1 = And(packed1, mask); + StoreU(raw1, d, raw + 1 * N); + + const VU16 raw2 = And(packed2, mask); + StoreU(raw2, d, raw + 2 * N); + + const VU16 raw3 = And(packed3, mask); + StoreU(raw3, d, raw + 3 * N); + + const VU16 raw4 = And(packed4, mask); + StoreU(raw4, d, raw + 4 * N); + + const VU16 raw5 = And(packed5, mask); + StoreU(raw5, d, raw + 5 * N); + + const VU16 raw6 = And(packed6, mask); + StoreU(raw6, d, raw + 6 * N); + + const VU16 raw7 = And(packed7, mask); + StoreU(raw7, d, raw + 7 * N); + + const VU16 mid4 = Set(d, 0x3C0u); // top 4 in lower 10 + const VU16 raw8 = + OrAnd(ShiftRight<10>(packed0), ShiftLeft<6>(packed8), mid4); + const VU16 raw9 = + OrAnd(ShiftRight<10>(packed1), ShiftLeft<2>(packed8), mid4); + const VU16 rawA = + OrAnd(ShiftRight<10>(packed2), ShiftRight<2>(packed8), mid4); + const VU16 rawB = + OrAnd(ShiftRight<10>(packed3), ShiftRight<6>(packed8), mid4); + const VU16 rawC = + OrAnd(ShiftRight<10>(packed4), ShiftLeft<6>(packed9), mid4); + const VU16 rawD = + OrAnd(ShiftRight<10>(packed5), ShiftLeft<2>(packed9), mid4); + const VU16 rawE = + OrAnd(ShiftRight<10>(packed6), ShiftRight<2>(packed9), mid4); + const VU16 rawF = + OrAnd(ShiftRight<10>(packed7), ShiftRight<6>(packed9), mid4); + + StoreU(raw8, d, raw + 8 * N); + StoreU(raw9, d, raw + 9 * N); + StoreU(rawA, d, raw + 0xA * N); + StoreU(rawB, d, raw + 0xB * N); + StoreU(rawC, d, raw + 0xC * N); + StoreU(rawD, d, raw + 0xD * N); + StoreU(rawE, d, raw + 0xE * N); + StoreU(rawF, d, raw + 0xF * N); + } +}; // Pack16<10> + +template <> +struct Pack16<11> { + template <class D> + HWY_INLINE void Pack(D d, const uint16_t* HWY_RESTRICT raw, + uint16_t* HWY_RESTRICT packed_out) const { + using VU16 = Vec<decltype(d)>; + const size_t N = Lanes(d); + const VU16 raw0 = LoadU(d, raw + 0 * N); + const VU16 raw1 = LoadU(d, raw + 1 * N); + const VU16 raw2 = LoadU(d, raw + 2 * N); + const VU16 raw3 = LoadU(d, raw + 3 * N); + const VU16 raw4 = LoadU(d, raw + 4 * N); + const VU16 raw5 = LoadU(d, raw + 5 * N); + const VU16 raw6 = LoadU(d, raw + 6 * N); + const VU16 raw7 = LoadU(d, raw + 7 * N); + const VU16 raw8 = LoadU(d, raw + 8 * N); + const VU16 raw9 = LoadU(d, raw + 9 * N); + const VU16 rawA = LoadU(d, raw + 0xA * N); + const VU16 rawB = LoadU(d, raw + 0xB * N); + const VU16 rawC = LoadU(d, raw + 0xC * N); + const VU16 rawD = LoadU(d, raw + 0xD * N); + const VU16 rawE = LoadU(d, raw + 0xE * N); + const VU16 rawF = LoadU(d, raw + 0xF * N); + + // It is not obvious what the optimal partitioning looks like. To reduce the + // number of constants, we want to minimize the number of distinct bit + // lengths. 11+5 also requires 6-bit remnants with 4-bit leftovers. + // 8+3 seems better: it is easier to scatter 3 bits into the MSBs. + const VU16 lo8 = Set(d, 0xFFu); + + // Lower 8 bits of all raw + const VU16 packed0 = OrAnd(ShiftLeft<8>(raw1), raw0, lo8); + const VU16 packed1 = OrAnd(ShiftLeft<8>(raw3), raw2, lo8); + const VU16 packed2 = OrAnd(ShiftLeft<8>(raw5), raw4, lo8); + const VU16 packed3 = OrAnd(ShiftLeft<8>(raw7), raw6, lo8); + const VU16 packed4 = OrAnd(ShiftLeft<8>(raw9), raw8, lo8); + const VU16 packed5 = OrAnd(ShiftLeft<8>(rawB), rawA, lo8); + const VU16 packed6 = OrAnd(ShiftLeft<8>(rawD), rawC, lo8); + const VU16 packed7 = OrAnd(ShiftLeft<8>(rawF), rawE, lo8); + + StoreU(packed0, d, packed_out + 0 * N); + StoreU(packed1, d, packed_out + 1 * N); + StoreU(packed2, d, packed_out + 2 * N); + StoreU(packed3, d, packed_out + 3 * N); + StoreU(packed4, d, packed_out + 4 * N); + StoreU(packed5, d, packed_out + 5 * N); + StoreU(packed6, d, packed_out + 6 * N); + StoreU(packed7, d, packed_out + 7 * N); + + // Three vectors, five 3bit remnants each, plus one 3bit in their MSB. + const VU16 top0 = ShiftRight<8>(raw0); + const VU16 top1 = ShiftRight<8>(raw1); + const VU16 top2 = ShiftRight<8>(raw2); + // Insert top raw bits into 3-bit groups within packed8..A. Moving the + // mask along avoids masking each of raw0..E and enables OrAnd. + VU16 next = Set(d, 0x38u); // 0x7 << 3 + VU16 packed8 = OrAnd(top0, ShiftRight<5>(raw3), next); + VU16 packed9 = OrAnd(top1, ShiftRight<5>(raw4), next); + VU16 packedA = OrAnd(top2, ShiftRight<5>(raw5), next); + next = ShiftLeft<3>(next); + packed8 = OrAnd(packed8, ShiftRight<2>(raw6), next); + packed9 = OrAnd(packed9, ShiftRight<2>(raw7), next); + packedA = OrAnd(packedA, ShiftRight<2>(raw8), next); + next = ShiftLeft<3>(next); + packed8 = OrAnd(packed8, Add(raw9, raw9), next); + packed9 = OrAnd(packed9, Add(rawA, rawA), next); + packedA = OrAnd(packedA, Add(rawB, rawB), next); + next = ShiftLeft<3>(next); + packed8 = OrAnd(packed8, ShiftLeft<4>(rawC), next); + packed9 = OrAnd(packed9, ShiftLeft<4>(rawD), next); + packedA = OrAnd(packedA, ShiftLeft<4>(rawE), next); + + // Scatter upper 3 bits of rawF into the upper bits. + next = ShiftLeft<3>(next); // = 0x8000u + packed8 = OrAnd(packed8, ShiftLeft<7>(rawF), next); + packed9 = OrAnd(packed9, ShiftLeft<6>(rawF), next); + packedA = OrAnd(packedA, ShiftLeft<5>(rawF), next); + + StoreU(packed8, d, packed_out + 8 * N); + StoreU(packed9, d, packed_out + 9 * N); + StoreU(packedA, d, packed_out + 0xA * N); + } + + template <class D> + HWY_INLINE void Unpack(D d, const uint16_t* HWY_RESTRICT packed_in, + uint16_t* HWY_RESTRICT raw) const { + using VU16 = Vec<decltype(d)>; + const size_t N = Lanes(d); + + const VU16 packed0 = BitCast(d, LoadU(d, packed_in + 0 * N)); + const VU16 packed1 = BitCast(d, LoadU(d, packed_in + 1 * N)); + const VU16 packed2 = BitCast(d, LoadU(d, packed_in + 2 * N)); + const VU16 packed3 = BitCast(d, LoadU(d, packed_in + 3 * N)); + const VU16 packed4 = BitCast(d, LoadU(d, packed_in + 4 * N)); + const VU16 packed5 = BitCast(d, LoadU(d, packed_in + 5 * N)); + const VU16 packed6 = BitCast(d, LoadU(d, packed_in + 6 * N)); + const VU16 packed7 = BitCast(d, LoadU(d, packed_in + 7 * N)); + const VU16 packed8 = BitCast(d, LoadU(d, packed_in + 8 * N)); + const VU16 packed9 = BitCast(d, LoadU(d, packed_in + 9 * N)); + const VU16 packedA = BitCast(d, LoadU(d, packed_in + 0xA * N)); + + const VU16 mask = Set(d, 0xFFu); // Lowest 8 bits + + const VU16 down0 = And(packed0, mask); + const VU16 down1 = ShiftRight<8>(packed0); + const VU16 down2 = And(packed1, mask); + const VU16 down3 = ShiftRight<8>(packed1); + const VU16 down4 = And(packed2, mask); + const VU16 down5 = ShiftRight<8>(packed2); + const VU16 down6 = And(packed3, mask); + const VU16 down7 = ShiftRight<8>(packed3); + const VU16 down8 = And(packed4, mask); + const VU16 down9 = ShiftRight<8>(packed4); + const VU16 downA = And(packed5, mask); + const VU16 downB = ShiftRight<8>(packed5); + const VU16 downC = And(packed6, mask); + const VU16 downD = ShiftRight<8>(packed6); + const VU16 downE = And(packed7, mask); + const VU16 downF = ShiftRight<8>(packed7); + + // Three bits from packed8..A, eight bits from down0..F. + const VU16 hi3 = Set(d, 0x700u); + const VU16 raw0 = OrAnd(down0, ShiftLeft<8>(packed8), hi3); + const VU16 raw1 = OrAnd(down1, ShiftLeft<8>(packed9), hi3); + const VU16 raw2 = OrAnd(down2, ShiftLeft<8>(packedA), hi3); + + const VU16 raw3 = OrAnd(down3, ShiftLeft<5>(packed8), hi3); + const VU16 raw4 = OrAnd(down4, ShiftLeft<5>(packed9), hi3); + const VU16 raw5 = OrAnd(down5, ShiftLeft<5>(packedA), hi3); + + const VU16 raw6 = OrAnd(down6, ShiftLeft<2>(packed8), hi3); + const VU16 raw7 = OrAnd(down7, ShiftLeft<2>(packed9), hi3); + const VU16 raw8 = OrAnd(down8, ShiftLeft<2>(packedA), hi3); + + const VU16 raw9 = OrAnd(down9, ShiftRight<1>(packed8), hi3); + const VU16 rawA = OrAnd(downA, ShiftRight<1>(packed9), hi3); + const VU16 rawB = OrAnd(downB, ShiftRight<1>(packedA), hi3); + + const VU16 rawC = OrAnd(downC, ShiftRight<4>(packed8), hi3); + const VU16 rawD = OrAnd(downD, ShiftRight<4>(packed9), hi3); + const VU16 rawE = OrAnd(downE, ShiftRight<4>(packedA), hi3); + + // Shift MSB into the top 3-of-11 and mask. + const VU16 rawF = Or(downF, Xor3(And(ShiftRight<7>(packed8), hi3), + And(ShiftRight<6>(packed9), hi3), + And(ShiftRight<5>(packedA), hi3))); + + StoreU(raw0, d, raw + 0 * N); + StoreU(raw1, d, raw + 1 * N); + StoreU(raw2, d, raw + 2 * N); + StoreU(raw3, d, raw + 3 * N); + StoreU(raw4, d, raw + 4 * N); + StoreU(raw5, d, raw + 5 * N); + StoreU(raw6, d, raw + 6 * N); + StoreU(raw7, d, raw + 7 * N); + StoreU(raw8, d, raw + 8 * N); + StoreU(raw9, d, raw + 9 * N); + StoreU(rawA, d, raw + 0xA * N); + StoreU(rawB, d, raw + 0xB * N); + StoreU(rawC, d, raw + 0xC * N); + StoreU(rawD, d, raw + 0xD * N); + StoreU(rawE, d, raw + 0xE * N); + StoreU(rawF, d, raw + 0xF * N); + } +}; // Pack16<11> + +template <> +struct Pack16<12> { + template <class D> + HWY_INLINE void Pack(D d, const uint16_t* HWY_RESTRICT raw, + uint16_t* HWY_RESTRICT packed_out) const { + using VU16 = Vec<decltype(d)>; + const size_t N = Lanes(d); + const VU16 raw0 = LoadU(d, raw + 0 * N); + const VU16 raw1 = LoadU(d, raw + 1 * N); + const VU16 raw2 = LoadU(d, raw + 2 * N); + const VU16 raw3 = LoadU(d, raw + 3 * N); + const VU16 raw4 = LoadU(d, raw + 4 * N); + const VU16 raw5 = LoadU(d, raw + 5 * N); + const VU16 raw6 = LoadU(d, raw + 6 * N); + const VU16 raw7 = LoadU(d, raw + 7 * N); + const VU16 raw8 = LoadU(d, raw + 8 * N); + const VU16 raw9 = LoadU(d, raw + 9 * N); + const VU16 rawA = LoadU(d, raw + 0xA * N); + const VU16 rawB = LoadU(d, raw + 0xB * N); + const VU16 rawC = LoadU(d, raw + 0xC * N); + const VU16 rawD = LoadU(d, raw + 0xD * N); + const VU16 rawE = LoadU(d, raw + 0xE * N); + const VU16 rawF = LoadU(d, raw + 0xF * N); + + // 8 vectors, each with 12+4 bits; top 8 bits are concatenated into + // packed8 to packedB. + const VU16 packed0 = Or(ShiftLeft<12>(raw8), raw0); + const VU16 packed1 = Or(ShiftLeft<12>(raw9), raw1); + const VU16 packed2 = Or(ShiftLeft<12>(rawA), raw2); + const VU16 packed3 = Or(ShiftLeft<12>(rawB), raw3); + const VU16 packed4 = Or(ShiftLeft<12>(rawC), raw4); + const VU16 packed5 = Or(ShiftLeft<12>(rawD), raw5); + const VU16 packed6 = Or(ShiftLeft<12>(rawE), raw6); + const VU16 packed7 = Or(ShiftLeft<12>(rawF), raw7); + + // Masking after shifting left enables OrAnd. + const VU16 hi8 = Set(d, 0xFF00u); + const VU16 packed8 = OrAnd(ShiftRight<4>(raw8), ShiftLeft<4>(raw9), hi8); + const VU16 packed9 = OrAnd(ShiftRight<4>(rawA), ShiftLeft<4>(rawB), hi8); + const VU16 packedA = OrAnd(ShiftRight<4>(rawC), ShiftLeft<4>(rawD), hi8); + const VU16 packedB = OrAnd(ShiftRight<4>(rawE), ShiftLeft<4>(rawF), hi8); + StoreU(packed0, d, packed_out + 0 * N); + StoreU(packed1, d, packed_out + 1 * N); + StoreU(packed2, d, packed_out + 2 * N); + StoreU(packed3, d, packed_out + 3 * N); + StoreU(packed4, d, packed_out + 4 * N); + StoreU(packed5, d, packed_out + 5 * N); + StoreU(packed6, d, packed_out + 6 * N); + StoreU(packed7, d, packed_out + 7 * N); + StoreU(packed8, d, packed_out + 8 * N); + StoreU(packed9, d, packed_out + 9 * N); + StoreU(packedA, d, packed_out + 0xA * N); + StoreU(packedB, d, packed_out + 0xB * N); + } + + template <class D> + HWY_INLINE void Unpack(D d, const uint16_t* HWY_RESTRICT packed_in, + uint16_t* HWY_RESTRICT raw) const { + using VU16 = Vec<decltype(d)>; + const size_t N = Lanes(d); + + const VU16 packed0 = BitCast(d, LoadU(d, packed_in + 0 * N)); + const VU16 packed1 = BitCast(d, LoadU(d, packed_in + 1 * N)); + const VU16 packed2 = BitCast(d, LoadU(d, packed_in + 2 * N)); + const VU16 packed3 = BitCast(d, LoadU(d, packed_in + 3 * N)); + const VU16 packed4 = BitCast(d, LoadU(d, packed_in + 4 * N)); + const VU16 packed5 = BitCast(d, LoadU(d, packed_in + 5 * N)); + const VU16 packed6 = BitCast(d, LoadU(d, packed_in + 6 * N)); + const VU16 packed7 = BitCast(d, LoadU(d, packed_in + 7 * N)); + const VU16 packed8 = BitCast(d, LoadU(d, packed_in + 8 * N)); + const VU16 packed9 = BitCast(d, LoadU(d, packed_in + 9 * N)); + const VU16 packedA = BitCast(d, LoadU(d, packed_in + 0xA * N)); + const VU16 packedB = BitCast(d, LoadU(d, packed_in + 0xB * N)); + + const VU16 mask = Set(d, 0xFFFu); // Lowest 12 bits + + const VU16 raw0 = And(packed0, mask); + StoreU(raw0, d, raw + 0 * N); + + const VU16 raw1 = And(packed1, mask); + StoreU(raw1, d, raw + 1 * N); + + const VU16 raw2 = And(packed2, mask); + StoreU(raw2, d, raw + 2 * N); + + const VU16 raw3 = And(packed3, mask); + StoreU(raw3, d, raw + 3 * N); + + const VU16 raw4 = And(packed4, mask); + StoreU(raw4, d, raw + 4 * N); + + const VU16 raw5 = And(packed5, mask); + StoreU(raw5, d, raw + 5 * N); + + const VU16 raw6 = And(packed6, mask); + StoreU(raw6, d, raw + 6 * N); + + const VU16 raw7 = And(packed7, mask); + StoreU(raw7, d, raw + 7 * N); + + const VU16 mid8 = Set(d, 0xFF0u); // upper 8 in lower 12 + const VU16 raw8 = + OrAnd(ShiftRight<12>(packed0), ShiftLeft<4>(packed8), mid8); + const VU16 raw9 = + OrAnd(ShiftRight<12>(packed1), ShiftRight<4>(packed8), mid8); + const VU16 rawA = + OrAnd(ShiftRight<12>(packed2), ShiftLeft<4>(packed9), mid8); + const VU16 rawB = + OrAnd(ShiftRight<12>(packed3), ShiftRight<4>(packed9), mid8); + const VU16 rawC = + OrAnd(ShiftRight<12>(packed4), ShiftLeft<4>(packedA), mid8); + const VU16 rawD = + OrAnd(ShiftRight<12>(packed5), ShiftRight<4>(packedA), mid8); + const VU16 rawE = + OrAnd(ShiftRight<12>(packed6), ShiftLeft<4>(packedB), mid8); + const VU16 rawF = + OrAnd(ShiftRight<12>(packed7), ShiftRight<4>(packedB), mid8); + StoreU(raw8, d, raw + 8 * N); + StoreU(raw9, d, raw + 9 * N); + StoreU(rawA, d, raw + 0xA * N); + StoreU(rawB, d, raw + 0xB * N); + StoreU(rawC, d, raw + 0xC * N); + StoreU(rawD, d, raw + 0xD * N); + StoreU(rawE, d, raw + 0xE * N); + StoreU(rawF, d, raw + 0xF * N); + } +}; // Pack16<12> + +template <> +struct Pack16<13> { + template <class D> + HWY_INLINE void Pack(D d, const uint16_t* HWY_RESTRICT raw, + uint16_t* HWY_RESTRICT packed_out) const { + using VU16 = Vec<decltype(d)>; + const size_t N = Lanes(d); + const VU16 raw0 = LoadU(d, raw + 0 * N); + const VU16 raw1 = LoadU(d, raw + 1 * N); + const VU16 raw2 = LoadU(d, raw + 2 * N); + const VU16 raw3 = LoadU(d, raw + 3 * N); + const VU16 raw4 = LoadU(d, raw + 4 * N); + const VU16 raw5 = LoadU(d, raw + 5 * N); + const VU16 raw6 = LoadU(d, raw + 6 * N); + const VU16 raw7 = LoadU(d, raw + 7 * N); + const VU16 raw8 = LoadU(d, raw + 8 * N); + const VU16 raw9 = LoadU(d, raw + 9 * N); + const VU16 rawA = LoadU(d, raw + 0xA * N); + const VU16 rawB = LoadU(d, raw + 0xB * N); + const VU16 rawC = LoadU(d, raw + 0xC * N); + const VU16 rawD = LoadU(d, raw + 0xD * N); + const VU16 rawE = LoadU(d, raw + 0xE * N); + const VU16 rawF = LoadU(d, raw + 0xF * N); + + // As with 11 bits, it is not obvious what the optimal partitioning looks + // like. We similarly go with an 8+5 split. + const VU16 lo8 = Set(d, 0xFFu); + + // Lower 8 bits of all raw + const VU16 packed0 = OrAnd(ShiftLeft<8>(raw1), raw0, lo8); + const VU16 packed1 = OrAnd(ShiftLeft<8>(raw3), raw2, lo8); + const VU16 packed2 = OrAnd(ShiftLeft<8>(raw5), raw4, lo8); + const VU16 packed3 = OrAnd(ShiftLeft<8>(raw7), raw6, lo8); + const VU16 packed4 = OrAnd(ShiftLeft<8>(raw9), raw8, lo8); + const VU16 packed5 = OrAnd(ShiftLeft<8>(rawB), rawA, lo8); + const VU16 packed6 = OrAnd(ShiftLeft<8>(rawD), rawC, lo8); + const VU16 packed7 = OrAnd(ShiftLeft<8>(rawF), rawE, lo8); + + StoreU(packed0, d, packed_out + 0 * N); + StoreU(packed1, d, packed_out + 1 * N); + StoreU(packed2, d, packed_out + 2 * N); + StoreU(packed3, d, packed_out + 3 * N); + StoreU(packed4, d, packed_out + 4 * N); + StoreU(packed5, d, packed_out + 5 * N); + StoreU(packed6, d, packed_out + 6 * N); + StoreU(packed7, d, packed_out + 7 * N); + + // Five vectors, three 5bit remnants each, plus one 5bit in their MSB. + const VU16 top0 = ShiftRight<8>(raw0); + const VU16 top1 = ShiftRight<8>(raw1); + const VU16 top2 = ShiftRight<8>(raw2); + const VU16 top3 = ShiftRight<8>(raw3); + const VU16 top4 = ShiftRight<8>(raw4); + + // Insert top raw bits into 5-bit groups within packed8..C. Moving the + // mask along avoids masking each of raw0..E and enables OrAnd. + VU16 next = Set(d, 0x3E0u); // 0x1F << 5 + VU16 packed8 = OrAnd(top0, ShiftRight<3>(raw5), next); + VU16 packed9 = OrAnd(top1, ShiftRight<3>(raw6), next); + VU16 packedA = OrAnd(top2, ShiftRight<3>(raw7), next); + VU16 packedB = OrAnd(top3, ShiftRight<3>(raw8), next); + VU16 packedC = OrAnd(top4, ShiftRight<3>(raw9), next); + next = ShiftLeft<5>(next); + packed8 = OrAnd(packed8, ShiftLeft<2>(rawA), next); + packed9 = OrAnd(packed9, ShiftLeft<2>(rawB), next); + packedA = OrAnd(packedA, ShiftLeft<2>(rawC), next); + packedB = OrAnd(packedB, ShiftLeft<2>(rawD), next); + packedC = OrAnd(packedC, ShiftLeft<2>(rawE), next); + + // Scatter upper 5 bits of rawF into the upper bits. + next = ShiftLeft<3>(next); // = 0x8000u + packed8 = OrAnd(packed8, ShiftLeft<7>(rawF), next); + packed9 = OrAnd(packed9, ShiftLeft<6>(rawF), next); + packedA = OrAnd(packedA, ShiftLeft<5>(rawF), next); + packedB = OrAnd(packedB, ShiftLeft<4>(rawF), next); + packedC = OrAnd(packedC, ShiftLeft<3>(rawF), next); + + StoreU(packed8, d, packed_out + 8 * N); + StoreU(packed9, d, packed_out + 9 * N); + StoreU(packedA, d, packed_out + 0xA * N); + StoreU(packedB, d, packed_out + 0xB * N); + StoreU(packedC, d, packed_out + 0xC * N); + } + + template <class D> + HWY_INLINE void Unpack(D d, const uint16_t* HWY_RESTRICT packed_in, + uint16_t* HWY_RESTRICT raw) const { + using VU16 = Vec<decltype(d)>; + const size_t N = Lanes(d); + + const VU16 packed0 = BitCast(d, LoadU(d, packed_in + 0 * N)); + const VU16 packed1 = BitCast(d, LoadU(d, packed_in + 1 * N)); + const VU16 packed2 = BitCast(d, LoadU(d, packed_in + 2 * N)); + const VU16 packed3 = BitCast(d, LoadU(d, packed_in + 3 * N)); + const VU16 packed4 = BitCast(d, LoadU(d, packed_in + 4 * N)); + const VU16 packed5 = BitCast(d, LoadU(d, packed_in + 5 * N)); + const VU16 packed6 = BitCast(d, LoadU(d, packed_in + 6 * N)); + const VU16 packed7 = BitCast(d, LoadU(d, packed_in + 7 * N)); + const VU16 packed8 = BitCast(d, LoadU(d, packed_in + 8 * N)); + const VU16 packed9 = BitCast(d, LoadU(d, packed_in + 9 * N)); + const VU16 packedA = BitCast(d, LoadU(d, packed_in + 0xA * N)); + const VU16 packedB = BitCast(d, LoadU(d, packed_in + 0xB * N)); + const VU16 packedC = BitCast(d, LoadU(d, packed_in + 0xC * N)); + + const VU16 mask = Set(d, 0xFFu); // Lowest 8 bits + + const VU16 down0 = And(packed0, mask); + const VU16 down1 = ShiftRight<8>(packed0); + const VU16 down2 = And(packed1, mask); + const VU16 down3 = ShiftRight<8>(packed1); + const VU16 down4 = And(packed2, mask); + const VU16 down5 = ShiftRight<8>(packed2); + const VU16 down6 = And(packed3, mask); + const VU16 down7 = ShiftRight<8>(packed3); + const VU16 down8 = And(packed4, mask); + const VU16 down9 = ShiftRight<8>(packed4); + const VU16 downA = And(packed5, mask); + const VU16 downB = ShiftRight<8>(packed5); + const VU16 downC = And(packed6, mask); + const VU16 downD = ShiftRight<8>(packed6); + const VU16 downE = And(packed7, mask); + const VU16 downF = ShiftRight<8>(packed7); + + // Upper five bits from packed8..C, eight bits from down0..F. + const VU16 hi5 = Set(d, 0x1F00u); + const VU16 raw0 = OrAnd(down0, ShiftLeft<8>(packed8), hi5); + const VU16 raw1 = OrAnd(down1, ShiftLeft<8>(packed9), hi5); + const VU16 raw2 = OrAnd(down2, ShiftLeft<8>(packedA), hi5); + const VU16 raw3 = OrAnd(down3, ShiftLeft<8>(packedB), hi5); + const VU16 raw4 = OrAnd(down4, ShiftLeft<8>(packedC), hi5); + + const VU16 raw5 = OrAnd(down5, ShiftLeft<3>(packed8), hi5); + const VU16 raw6 = OrAnd(down6, ShiftLeft<3>(packed9), hi5); + const VU16 raw7 = OrAnd(down7, ShiftLeft<3>(packedA), hi5); + const VU16 raw8 = OrAnd(down8, ShiftLeft<3>(packed9), hi5); + const VU16 raw9 = OrAnd(down9, ShiftLeft<3>(packedA), hi5); + + const VU16 rawA = OrAnd(downA, ShiftRight<2>(packed8), hi5); + const VU16 rawB = OrAnd(downB, ShiftRight<2>(packed9), hi5); + const VU16 rawC = OrAnd(downC, ShiftRight<2>(packedA), hi5); + const VU16 rawD = OrAnd(downD, ShiftRight<2>(packed9), hi5); + const VU16 rawE = OrAnd(downE, ShiftRight<2>(packedA), hi5); + + // Shift MSB into the top 5-of-11 and mask. + const VU16 p0 = Xor3(And(ShiftRight<7>(packed8), hi5), // + And(ShiftRight<6>(packed9), hi5), + And(ShiftRight<5>(packedA), hi5)); + const VU16 p1 = Xor3(And(ShiftRight<4>(packedB), hi5), + And(ShiftRight<3>(packedC), hi5), downF); + const VU16 rawF = Or(p0, p1); + + StoreU(raw0, d, raw + 0 * N); + StoreU(raw1, d, raw + 1 * N); + StoreU(raw2, d, raw + 2 * N); + StoreU(raw3, d, raw + 3 * N); + StoreU(raw4, d, raw + 4 * N); + StoreU(raw5, d, raw + 5 * N); + StoreU(raw6, d, raw + 6 * N); + StoreU(raw7, d, raw + 7 * N); + StoreU(raw8, d, raw + 8 * N); + StoreU(raw9, d, raw + 9 * N); + StoreU(rawA, d, raw + 0xA * N); + StoreU(rawB, d, raw + 0xB * N); + StoreU(rawC, d, raw + 0xC * N); + StoreU(rawD, d, raw + 0xD * N); + StoreU(rawE, d, raw + 0xE * N); + StoreU(rawF, d, raw + 0xF * N); + } +}; // Pack16<13> + +template <> +struct Pack16<14> { + template <class D> + HWY_INLINE void Pack(D d, const uint16_t* HWY_RESTRICT raw, + uint16_t* HWY_RESTRICT packed_out) const { + using VU16 = Vec<decltype(d)>; + const size_t N = Lanes(d); + const VU16 raw0 = LoadU(d, raw + 0 * N); + const VU16 raw1 = LoadU(d, raw + 1 * N); + const VU16 raw2 = LoadU(d, raw + 2 * N); + const VU16 raw3 = LoadU(d, raw + 3 * N); + const VU16 raw4 = LoadU(d, raw + 4 * N); + const VU16 raw5 = LoadU(d, raw + 5 * N); + const VU16 raw6 = LoadU(d, raw + 6 * N); + const VU16 raw7 = LoadU(d, raw + 7 * N); + const VU16 raw8 = LoadU(d, raw + 8 * N); + const VU16 raw9 = LoadU(d, raw + 9 * N); + const VU16 rawA = LoadU(d, raw + 0xA * N); + const VU16 rawB = LoadU(d, raw + 0xB * N); + const VU16 rawC = LoadU(d, raw + 0xC * N); + const VU16 rawD = LoadU(d, raw + 0xD * N); + const VU16 rawE = LoadU(d, raw + 0xE * N); + const VU16 rawF = LoadU(d, raw + 0xF * N); + + // 14 vectors, each with 14+2 bits; two raw vectors are scattered + // across the upper 2 bits. + const VU16 hi2 = Set(d, 0xC000u); + const VU16 packed0 = Or(raw0, ShiftLeft<14>(rawE)); + const VU16 packed1 = OrAnd(raw1, ShiftLeft<12>(rawE), hi2); + const VU16 packed2 = OrAnd(raw2, ShiftLeft<10>(rawE), hi2); + const VU16 packed3 = OrAnd(raw3, ShiftLeft<8>(rawE), hi2); + const VU16 packed4 = OrAnd(raw4, ShiftLeft<6>(rawE), hi2); + const VU16 packed5 = OrAnd(raw5, ShiftLeft<4>(rawE), hi2); + const VU16 packed6 = OrAnd(raw6, ShiftLeft<2>(rawE), hi2); + const VU16 packed7 = Or(raw7, ShiftLeft<14>(rawF)); + const VU16 packed8 = OrAnd(raw8, ShiftLeft<12>(rawF), hi2); + const VU16 packed9 = OrAnd(raw9, ShiftLeft<10>(rawF), hi2); + const VU16 packedA = OrAnd(rawA, ShiftLeft<8>(rawF), hi2); + const VU16 packedB = OrAnd(rawB, ShiftLeft<6>(rawF), hi2); + const VU16 packedC = OrAnd(rawC, ShiftLeft<4>(rawF), hi2); + const VU16 packedD = OrAnd(rawD, ShiftLeft<2>(rawF), hi2); + + StoreU(packed0, d, packed_out + 0 * N); + StoreU(packed1, d, packed_out + 1 * N); + StoreU(packed2, d, packed_out + 2 * N); + StoreU(packed3, d, packed_out + 3 * N); + StoreU(packed4, d, packed_out + 4 * N); + StoreU(packed5, d, packed_out + 5 * N); + StoreU(packed6, d, packed_out + 6 * N); + StoreU(packed7, d, packed_out + 7 * N); + StoreU(packed8, d, packed_out + 8 * N); + StoreU(packed9, d, packed_out + 9 * N); + StoreU(packedA, d, packed_out + 0xA * N); + StoreU(packedB, d, packed_out + 0xB * N); + StoreU(packedC, d, packed_out + 0xC * N); + StoreU(packedD, d, packed_out + 0xD * N); + } + + template <class D> + HWY_INLINE void Unpack(D d, const uint16_t* HWY_RESTRICT packed_in, + uint16_t* HWY_RESTRICT raw) const { + using VU16 = Vec<decltype(d)>; + const size_t N = Lanes(d); + + const VU16 packed0 = BitCast(d, LoadU(d, packed_in + 0 * N)); + const VU16 packed1 = BitCast(d, LoadU(d, packed_in + 1 * N)); + const VU16 packed2 = BitCast(d, LoadU(d, packed_in + 2 * N)); + const VU16 packed3 = BitCast(d, LoadU(d, packed_in + 3 * N)); + const VU16 packed4 = BitCast(d, LoadU(d, packed_in + 4 * N)); + const VU16 packed5 = BitCast(d, LoadU(d, packed_in + 5 * N)); + const VU16 packed6 = BitCast(d, LoadU(d, packed_in + 6 * N)); + const VU16 packed7 = BitCast(d, LoadU(d, packed_in + 7 * N)); + const VU16 packed8 = BitCast(d, LoadU(d, packed_in + 8 * N)); + const VU16 packed9 = BitCast(d, LoadU(d, packed_in + 9 * N)); + const VU16 packedA = BitCast(d, LoadU(d, packed_in + 0xA * N)); + const VU16 packedB = BitCast(d, LoadU(d, packed_in + 0xB * N)); + const VU16 packedC = BitCast(d, LoadU(d, packed_in + 0xC * N)); + const VU16 packedD = BitCast(d, LoadU(d, packed_in + 0xD * N)); + + const VU16 mask = Set(d, 0x3FFFu); // Lowest 14 bits + + const VU16 raw0 = And(packed0, mask); + StoreU(raw0, d, raw + 0 * N); + + const VU16 raw1 = And(packed1, mask); + StoreU(raw1, d, raw + 1 * N); + + const VU16 raw2 = And(packed2, mask); + StoreU(raw2, d, raw + 2 * N); + + const VU16 raw3 = And(packed3, mask); + StoreU(raw3, d, raw + 3 * N); + + const VU16 raw4 = And(packed4, mask); + StoreU(raw4, d, raw + 4 * N); + + const VU16 raw5 = And(packed5, mask); + StoreU(raw5, d, raw + 5 * N); + + const VU16 raw6 = And(packed6, mask); + StoreU(raw6, d, raw + 6 * N); + + const VU16 raw7 = And(packed7, mask); + StoreU(raw7, d, raw + 7 * N); + + const VU16 raw8 = And(packed8, mask); + StoreU(raw8, d, raw + 8 * N); + + const VU16 raw9 = And(packed9, mask); + StoreU(raw9, d, raw + 9 * N); + + const VU16 rawA = And(packedA, mask); + StoreU(rawA, d, raw + 0xA * N); + + const VU16 rawB = And(packedB, mask); + StoreU(rawB, d, raw + 0xB * N); + + const VU16 rawC = And(packedC, mask); + StoreU(rawC, d, raw + 0xC * N); + + const VU16 rawD = And(packedD, mask); + StoreU(rawD, d, raw + 0xD * N); + + // rawE is the concatenation of the top two bits in packed0..6. + const VU16 E0 = Xor3(ShiftRight<14>(packed0), // + ShiftRight<12>(AndNot(mask, packed1)), + ShiftRight<10>(AndNot(mask, packed2))); + const VU16 E1 = Xor3(ShiftRight<8>(AndNot(mask, packed3)), + ShiftRight<6>(AndNot(mask, packed4)), + ShiftRight<4>(AndNot(mask, packed5))); + const VU16 rawE = Xor3(ShiftRight<2>(AndNot(mask, packed6)), E0, E1); + const VU16 F0 = Xor3(ShiftRight<14>(AndNot(mask, packed7)), + ShiftRight<12>(AndNot(mask, packed8)), + ShiftRight<10>(AndNot(mask, packed9))); + const VU16 F1 = Xor3(ShiftRight<8>(AndNot(mask, packedA)), + ShiftRight<6>(AndNot(mask, packedB)), + ShiftRight<4>(AndNot(mask, packedC))); + const VU16 rawF = Xor3(ShiftRight<2>(AndNot(mask, packedD)), F0, F1); + StoreU(rawE, d, raw + 0xE * N); + StoreU(rawF, d, raw + 0xF * N); + } +}; // Pack16<14> + +template <> +struct Pack16<15> { + template <class D> + HWY_INLINE void Pack(D d, const uint16_t* HWY_RESTRICT raw, + uint16_t* HWY_RESTRICT packed_out) const { + using VU16 = Vec<decltype(d)>; + const size_t N = Lanes(d); + const VU16 raw0 = LoadU(d, raw + 0 * N); + const VU16 raw1 = LoadU(d, raw + 1 * N); + const VU16 raw2 = LoadU(d, raw + 2 * N); + const VU16 raw3 = LoadU(d, raw + 3 * N); + const VU16 raw4 = LoadU(d, raw + 4 * N); + const VU16 raw5 = LoadU(d, raw + 5 * N); + const VU16 raw6 = LoadU(d, raw + 6 * N); + const VU16 raw7 = LoadU(d, raw + 7 * N); + const VU16 raw8 = LoadU(d, raw + 8 * N); + const VU16 raw9 = LoadU(d, raw + 9 * N); + const VU16 rawA = LoadU(d, raw + 0xA * N); + const VU16 rawB = LoadU(d, raw + 0xB * N); + const VU16 rawC = LoadU(d, raw + 0xC * N); + const VU16 rawD = LoadU(d, raw + 0xD * N); + const VU16 rawE = LoadU(d, raw + 0xE * N); + const VU16 rawF = LoadU(d, raw + 0xF * N); + + // 15 vectors, each with 15+1 bits; one packed vector is scattered + // across the upper bit. + const VU16 hi1 = Set(d, 0x8000u); + const VU16 packed0 = Or(raw0, ShiftLeft<15>(rawF)); + const VU16 packed1 = OrAnd(raw1, ShiftLeft<14>(rawF), hi1); + const VU16 packed2 = OrAnd(raw2, ShiftLeft<13>(rawF), hi1); + const VU16 packed3 = OrAnd(raw3, ShiftLeft<12>(rawF), hi1); + const VU16 packed4 = OrAnd(raw4, ShiftLeft<11>(rawF), hi1); + const VU16 packed5 = OrAnd(raw5, ShiftLeft<10>(rawF), hi1); + const VU16 packed6 = OrAnd(raw6, ShiftLeft<9>(rawF), hi1); + const VU16 packed7 = OrAnd(raw7, ShiftLeft<8>(rawF), hi1); + const VU16 packed8 = OrAnd(raw8, ShiftLeft<7>(rawF), hi1); + const VU16 packed9 = OrAnd(raw9, ShiftLeft<6>(rawF), hi1); + const VU16 packedA = OrAnd(rawA, ShiftLeft<5>(rawF), hi1); + const VU16 packedB = OrAnd(rawB, ShiftLeft<4>(rawF), hi1); + const VU16 packedC = OrAnd(rawC, ShiftLeft<3>(rawF), hi1); + const VU16 packedD = OrAnd(rawD, ShiftLeft<2>(rawF), hi1); + const VU16 packedE = OrAnd(rawE, ShiftLeft<1>(rawF), hi1); + + StoreU(packed0, d, packed_out + 0 * N); + StoreU(packed1, d, packed_out + 1 * N); + StoreU(packed2, d, packed_out + 2 * N); + StoreU(packed3, d, packed_out + 3 * N); + StoreU(packed4, d, packed_out + 4 * N); + StoreU(packed5, d, packed_out + 5 * N); + StoreU(packed6, d, packed_out + 6 * N); + StoreU(packed7, d, packed_out + 7 * N); + StoreU(packed8, d, packed_out + 8 * N); + StoreU(packed9, d, packed_out + 9 * N); + StoreU(packedA, d, packed_out + 0xA * N); + StoreU(packedB, d, packed_out + 0xB * N); + StoreU(packedC, d, packed_out + 0xC * N); + StoreU(packedD, d, packed_out + 0xD * N); + StoreU(packedE, d, packed_out + 0xE * N); + } + + template <class D> + HWY_INLINE void Unpack(D d, const uint16_t* HWY_RESTRICT packed_in, + uint16_t* HWY_RESTRICT raw) const { + using VU16 = Vec<decltype(d)>; + const size_t N = Lanes(d); + + const VU16 packed0 = BitCast(d, LoadU(d, packed_in + 0 * N)); + const VU16 packed1 = BitCast(d, LoadU(d, packed_in + 1 * N)); + const VU16 packed2 = BitCast(d, LoadU(d, packed_in + 2 * N)); + const VU16 packed3 = BitCast(d, LoadU(d, packed_in + 3 * N)); + const VU16 packed4 = BitCast(d, LoadU(d, packed_in + 4 * N)); + const VU16 packed5 = BitCast(d, LoadU(d, packed_in + 5 * N)); + const VU16 packed6 = BitCast(d, LoadU(d, packed_in + 6 * N)); + const VU16 packed7 = BitCast(d, LoadU(d, packed_in + 7 * N)); + const VU16 packed8 = BitCast(d, LoadU(d, packed_in + 8 * N)); + const VU16 packed9 = BitCast(d, LoadU(d, packed_in + 9 * N)); + const VU16 packedA = BitCast(d, LoadU(d, packed_in + 0xA * N)); + const VU16 packedB = BitCast(d, LoadU(d, packed_in + 0xB * N)); + const VU16 packedC = BitCast(d, LoadU(d, packed_in + 0xC * N)); + const VU16 packedD = BitCast(d, LoadU(d, packed_in + 0xD * N)); + const VU16 packedE = BitCast(d, LoadU(d, packed_in + 0xE * N)); + + const VU16 mask = Set(d, 0x7FFFu); // Lowest 15 bits + + const VU16 raw0 = And(packed0, mask); + StoreU(raw0, d, raw + 0 * N); + + const VU16 raw1 = And(packed1, mask); + StoreU(raw1, d, raw + 1 * N); + + const VU16 raw2 = And(packed2, mask); + StoreU(raw2, d, raw + 2 * N); + + const VU16 raw3 = And(packed3, mask); + StoreU(raw3, d, raw + 3 * N); + + const VU16 raw4 = And(packed4, mask); + StoreU(raw4, d, raw + 4 * N); + + const VU16 raw5 = And(packed5, mask); + StoreU(raw5, d, raw + 5 * N); + + const VU16 raw6 = And(packed6, mask); + StoreU(raw6, d, raw + 6 * N); + + const VU16 raw7 = And(packed7, mask); + StoreU(raw7, d, raw + 7 * N); + + const VU16 raw8 = And(packed8, mask); + StoreU(raw8, d, raw + 8 * N); + + const VU16 raw9 = And(packed9, mask); + StoreU(raw9, d, raw + 9 * N); + + const VU16 rawA = And(packedA, mask); + StoreU(rawA, d, raw + 0xA * N); + + const VU16 rawB = And(packedB, mask); + StoreU(rawB, d, raw + 0xB * N); + + const VU16 rawC = And(packedC, mask); + StoreU(rawC, d, raw + 0xC * N); + + const VU16 rawD = And(packedD, mask); + StoreU(rawD, d, raw + 0xD * N); + + const VU16 rawE = And(packedE, mask); + StoreU(rawE, d, raw + 0xE * N); + + // rawF is the concatenation of the top bit in packed0..E. + const VU16 F0 = Xor3(ShiftRight<15>(packed0), // + ShiftRight<14>(AndNot(mask, packed1)), + ShiftRight<13>(AndNot(mask, packed2))); + const VU16 F1 = Xor3(ShiftRight<12>(AndNot(mask, packed3)), + ShiftRight<11>(AndNot(mask, packed4)), + ShiftRight<10>(AndNot(mask, packed5))); + const VU16 F2 = Xor3(ShiftRight<9>(AndNot(mask, packed6)), + ShiftRight<8>(AndNot(mask, packed7)), + ShiftRight<7>(AndNot(mask, packed8))); + const VU16 F3 = Xor3(ShiftRight<6>(AndNot(mask, packed9)), + ShiftRight<5>(AndNot(mask, packedA)), + ShiftRight<4>(AndNot(mask, packedB))); + const VU16 F4 = Xor3(ShiftRight<3>(AndNot(mask, packedC)), + ShiftRight<2>(AndNot(mask, packedD)), + ShiftRight<1>(AndNot(mask, packedE))); + const VU16 rawF = Xor3(F0, F1, Xor3(F2, F3, F4)); + StoreU(rawF, d, raw + 0xF * N); + } +}; // Pack16<15> + +template <> +struct Pack16<16> { + template <class D> + HWY_INLINE void Pack(D d, const uint16_t* HWY_RESTRICT raw, + uint16_t* HWY_RESTRICT packed_out) const { + using VU16 = Vec<decltype(d)>; + const size_t N = Lanes(d); + const VU16 raw0 = LoadU(d, raw + 0 * N); + const VU16 raw1 = LoadU(d, raw + 1 * N); + const VU16 raw2 = LoadU(d, raw + 2 * N); + const VU16 raw3 = LoadU(d, raw + 3 * N); + const VU16 raw4 = LoadU(d, raw + 4 * N); + const VU16 raw5 = LoadU(d, raw + 5 * N); + const VU16 raw6 = LoadU(d, raw + 6 * N); + const VU16 raw7 = LoadU(d, raw + 7 * N); + const VU16 raw8 = LoadU(d, raw + 8 * N); + const VU16 raw9 = LoadU(d, raw + 9 * N); + const VU16 rawA = LoadU(d, raw + 0xA * N); + const VU16 rawB = LoadU(d, raw + 0xB * N); + const VU16 rawC = LoadU(d, raw + 0xC * N); + const VU16 rawD = LoadU(d, raw + 0xD * N); + const VU16 rawE = LoadU(d, raw + 0xE * N); + const VU16 rawF = LoadU(d, raw + 0xF * N); + + StoreU(raw0, d, packed_out + 0 * N); + StoreU(raw1, d, packed_out + 1 * N); + StoreU(raw2, d, packed_out + 2 * N); + StoreU(raw3, d, packed_out + 3 * N); + StoreU(raw4, d, packed_out + 4 * N); + StoreU(raw5, d, packed_out + 5 * N); + StoreU(raw6, d, packed_out + 6 * N); + StoreU(raw7, d, packed_out + 7 * N); + StoreU(raw8, d, packed_out + 8 * N); + StoreU(raw9, d, packed_out + 9 * N); + StoreU(rawA, d, packed_out + 0xA * N); + StoreU(rawB, d, packed_out + 0xB * N); + StoreU(rawC, d, packed_out + 0xC * N); + StoreU(rawD, d, packed_out + 0xD * N); + StoreU(rawE, d, packed_out + 0xE * N); + StoreU(rawF, d, packed_out + 0xF * N); + } + + template <class D> + HWY_INLINE void Unpack(D d, const uint16_t* HWY_RESTRICT packed_in, + uint16_t* HWY_RESTRICT raw) const { + using VU16 = Vec<decltype(d)>; + const size_t N = Lanes(d); + + const VU16 raw0 = BitCast(d, LoadU(d, packed_in + 0 * N)); + const VU16 raw1 = BitCast(d, LoadU(d, packed_in + 1 * N)); + const VU16 raw2 = BitCast(d, LoadU(d, packed_in + 2 * N)); + const VU16 raw3 = BitCast(d, LoadU(d, packed_in + 3 * N)); + const VU16 raw4 = BitCast(d, LoadU(d, packed_in + 4 * N)); + const VU16 raw5 = BitCast(d, LoadU(d, packed_in + 5 * N)); + const VU16 raw6 = BitCast(d, LoadU(d, packed_in + 6 * N)); + const VU16 raw7 = BitCast(d, LoadU(d, packed_in + 7 * N)); + const VU16 raw8 = BitCast(d, LoadU(d, packed_in + 8 * N)); + const VU16 raw9 = BitCast(d, LoadU(d, packed_in + 9 * N)); + const VU16 rawA = BitCast(d, LoadU(d, packed_in + 0xA * N)); + const VU16 rawB = BitCast(d, LoadU(d, packed_in + 0xB * N)); + const VU16 rawC = BitCast(d, LoadU(d, packed_in + 0xC * N)); + const VU16 rawD = BitCast(d, LoadU(d, packed_in + 0xD * N)); + const VU16 rawE = BitCast(d, LoadU(d, packed_in + 0xE * N)); + const VU16 rawF = BitCast(d, LoadU(d, packed_in + 0xF * N)); + + StoreU(raw0, d, raw + 0 * N); + StoreU(raw1, d, raw + 1 * N); + StoreU(raw2, d, raw + 2 * N); + StoreU(raw3, d, raw + 3 * N); + StoreU(raw4, d, raw + 4 * N); + StoreU(raw5, d, raw + 5 * N); + StoreU(raw6, d, raw + 6 * N); + StoreU(raw7, d, raw + 7 * N); + StoreU(raw8, d, raw + 8 * N); + StoreU(raw9, d, raw + 9 * N); + StoreU(rawA, d, raw + 0xA * N); + StoreU(rawB, d, raw + 0xB * N); + StoreU(rawC, d, raw + 0xC * N); + StoreU(rawD, d, raw + 0xD * N); + StoreU(rawE, d, raw + 0xE * N); + StoreU(rawF, d, raw + 0xF * N); + } +}; // Pack16<16> + +// NOLINTNEXTLINE(google-readability-namespace-comments) +} // namespace HWY_NAMESPACE +} // namespace hwy +HWY_AFTER_NAMESPACE(); + +#endif // HIGHWAY_HWY_CONTRIB_BIT_PACK_INL_H_ |