111 lines
3.6 KiB
C++
111 lines
3.6 KiB
C++
// Copyright (c) the JPEG XL Project Authors. All rights reserved.
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//
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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#if defined(LIB_JPEGLI_TRANSPOSE_INL_H_) == defined(HWY_TARGET_TOGGLE)
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#ifdef LIB_JPEGLI_TRANSPOSE_INL_H_
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#undef LIB_JPEGLI_TRANSPOSE_INL_H_
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#else
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#define LIB_JPEGLI_TRANSPOSE_INL_H_
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#endif
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#include "lib/jxl/base/compiler_specific.h"
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HWY_BEFORE_NAMESPACE();
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namespace jpegli {
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namespace HWY_NAMESPACE {
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namespace {
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#if HWY_CAP_GE256
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JXL_INLINE void Transpose8x8Block(const float* JXL_RESTRICT from,
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float* JXL_RESTRICT to) {
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const HWY_CAPPED(float, 8) d;
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auto i0 = Load(d, from);
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auto i1 = Load(d, from + 1 * 8);
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auto i2 = Load(d, from + 2 * 8);
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auto i3 = Load(d, from + 3 * 8);
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auto i4 = Load(d, from + 4 * 8);
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auto i5 = Load(d, from + 5 * 8);
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auto i6 = Load(d, from + 6 * 8);
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auto i7 = Load(d, from + 7 * 8);
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const auto q0 = InterleaveLower(d, i0, i2);
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const auto q1 = InterleaveLower(d, i1, i3);
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const auto q2 = InterleaveUpper(d, i0, i2);
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const auto q3 = InterleaveUpper(d, i1, i3);
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const auto q4 = InterleaveLower(d, i4, i6);
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const auto q5 = InterleaveLower(d, i5, i7);
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const auto q6 = InterleaveUpper(d, i4, i6);
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const auto q7 = InterleaveUpper(d, i5, i7);
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const auto r0 = InterleaveLower(d, q0, q1);
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const auto r1 = InterleaveUpper(d, q0, q1);
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const auto r2 = InterleaveLower(d, q2, q3);
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const auto r3 = InterleaveUpper(d, q2, q3);
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const auto r4 = InterleaveLower(d, q4, q5);
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const auto r5 = InterleaveUpper(d, q4, q5);
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const auto r6 = InterleaveLower(d, q6, q7);
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const auto r7 = InterleaveUpper(d, q6, q7);
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i0 = ConcatLowerLower(d, r4, r0);
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i1 = ConcatLowerLower(d, r5, r1);
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i2 = ConcatLowerLower(d, r6, r2);
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i3 = ConcatLowerLower(d, r7, r3);
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i4 = ConcatUpperUpper(d, r4, r0);
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i5 = ConcatUpperUpper(d, r5, r1);
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i6 = ConcatUpperUpper(d, r6, r2);
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i7 = ConcatUpperUpper(d, r7, r3);
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Store(i0, d, to);
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Store(i1, d, to + 1 * 8);
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Store(i2, d, to + 2 * 8);
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Store(i3, d, to + 3 * 8);
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Store(i4, d, to + 4 * 8);
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Store(i5, d, to + 5 * 8);
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Store(i6, d, to + 6 * 8);
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Store(i7, d, to + 7 * 8);
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}
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#elif HWY_TARGET != HWY_SCALAR
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JXL_INLINE void Transpose8x8Block(const float* JXL_RESTRICT from,
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float* JXL_RESTRICT to) {
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const HWY_CAPPED(float, 4) d;
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for (size_t n = 0; n < 8; n += 4) {
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for (size_t m = 0; m < 8; m += 4) {
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auto p0 = Load(d, from + n * 8 + m);
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auto p1 = Load(d, from + (n + 1) * 8 + m);
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auto p2 = Load(d, from + (n + 2) * 8 + m);
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auto p3 = Load(d, from + (n + 3) * 8 + m);
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const auto q0 = InterleaveLower(d, p0, p2);
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const auto q1 = InterleaveLower(d, p1, p3);
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const auto q2 = InterleaveUpper(d, p0, p2);
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const auto q3 = InterleaveUpper(d, p1, p3);
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const auto r0 = InterleaveLower(d, q0, q1);
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const auto r1 = InterleaveUpper(d, q0, q1);
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const auto r2 = InterleaveLower(d, q2, q3);
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const auto r3 = InterleaveUpper(d, q2, q3);
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Store(r0, d, to + m * 8 + n);
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Store(r1, d, to + (1 + m) * 8 + n);
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Store(r2, d, to + (2 + m) * 8 + n);
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Store(r3, d, to + (3 + m) * 8 + n);
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}
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}
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}
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#else
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static JXL_INLINE void Transpose8x8Block(const float* JXL_RESTRICT from,
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float* JXL_RESTRICT to) {
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for (size_t n = 0; n < 8; ++n) {
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for (size_t m = 0; m < 8; ++m) {
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to[8 * n + m] = from[8 * m + n];
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}
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}
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}
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#endif
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// NOLINTNEXTLINE(google-readability-namespace-comments)
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} // namespace
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} // namespace HWY_NAMESPACE
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} // namespace jpegli
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HWY_AFTER_NAMESPACE();
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#endif // LIB_JPEGLI_TRANSPOSE_INL_H_
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