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+// Copyright (c) the JPEG XL Project Authors. All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Misc utilities for SIMD operations
+
+#if defined(LIB_JXL_SIMD_UTIL_INL_H_) == defined(HWY_TARGET_TOGGLE)
+#ifdef LIB_JXL_SIMD_UTIL_INL_H_
+#undef LIB_JXL_SIMD_UTIL_INL_H_
+#else
+#define LIB_JXL_SIMD_UTIL_INL_H_
+#endif
+
+#include <hwy/highway.h>
+
+#include "lib/jxl/base/compiler_specific.h"
+
+HWY_BEFORE_NAMESPACE();
+namespace jxl {
+namespace HWY_NAMESPACE {
+
+#if HWY_CAP_GE512
+using hwy::HWY_NAMESPACE::Half;
+using hwy::HWY_NAMESPACE::Vec;
+template <size_t i, class DF, class V>
+HWY_INLINE Vec<Half<Half<DF>>> Quarter(const DF df, V v) {
+ using HF = Half<DF>;
+ using HHF = Half<HF>;
+ auto half = i >= 2 ? UpperHalf(HF(), v) : LowerHalf(HF(), v);
+ return i & 1 ? UpperHalf(HHF(), half) : LowerHalf(HHF(), half);
+}
+
+template <class DF, class V>
+HWY_INLINE Vec<DF> Concat4(const DF df, V v0, V v1, V v2, V v3) {
+ using HF = Half<DF>;
+ return Combine(DF(), Combine(HF(), v3, v2), Combine(HF(), v1, v0));
+}
+
+#endif
+
+// Stores v0[0], v1[0], v0[1], v1[1], ... to mem, in this order. Mem must be
+// aligned.
+template <class DF, class V, typename T>
+void StoreInterleaved(const DF df, V v0, V v1, T* mem) {
+ static_assert(sizeof(T) == 4, "only use StoreInterleaved for 4-byte types");
+#if HWY_TARGET == HWY_SCALAR
+ Store(v0, df, mem);
+ Store(v1, df, mem + 1);
+#elif !HWY_CAP_GE256
+ Store(InterleaveLower(df, v0, v1), df, mem);
+ Store(InterleaveUpper(df, v0, v1), df, mem + Lanes(df));
+#else
+ if (!HWY_CAP_GE512 || Lanes(df) == 8) {
+ auto t0 = InterleaveLower(df, v0, v1);
+ auto t1 = InterleaveUpper(df, v0, v1);
+ Store(ConcatLowerLower(df, t1, t0), df, mem);
+ Store(ConcatUpperUpper(df, t1, t0), df, mem + Lanes(df));
+ } else {
+#if HWY_CAP_GE512
+ auto t0 = InterleaveLower(df, v0, v1);
+ auto t1 = InterleaveUpper(df, v0, v1);
+ Store(Concat4(df, Quarter<0>(df, t0), Quarter<0>(df, t1),
+ Quarter<1>(df, t0), Quarter<1>(df, t1)),
+ df, mem);
+ Store(Concat4(df, Quarter<2>(df, t0), Quarter<2>(df, t1),
+ Quarter<3>(df, t0), Quarter<3>(df, t1)),
+ df, mem + Lanes(df));
+#endif
+ }
+#endif
+}
+
+// Stores v0[0], v1[0], v2[0], v3[0], v0[1] ... to mem, in this order. Mem must
+// be aligned.
+template <class DF, class V, typename T>
+void StoreInterleaved(const DF df, V v0, V v1, V v2, V v3, T* mem) {
+ static_assert(sizeof(T) == 4, "only use StoreInterleaved for 4-byte types");
+#if HWY_TARGET == HWY_SCALAR
+ Store(v0, df, mem);
+ Store(v1, df, mem + 1);
+ Store(v2, df, mem + 2);
+ Store(v3, df, mem + 3);
+#elif !HWY_CAP_GE256
+ auto t0 = InterleaveLower(df, v0, v2);
+ auto t1 = InterleaveLower(df, v1, v3);
+ auto t2 = InterleaveUpper(df, v0, v2);
+ auto t3 = InterleaveUpper(df, v1, v3);
+ Store(InterleaveLower(df, t0, t1), df, mem);
+ Store(InterleaveUpper(df, t0, t1), df, mem + Lanes(df));
+ Store(InterleaveLower(df, t2, t3), df, mem + 2 * Lanes(df));
+ Store(InterleaveUpper(df, t2, t3), df, mem + 3 * Lanes(df));
+#elif !HWY_CAP_GE512
+ auto t0 = InterleaveLower(df, v0, v2);
+ auto t1 = InterleaveLower(df, v1, v3);
+ auto t2 = InterleaveUpper(df, v0, v2);
+ auto t3 = InterleaveUpper(df, v1, v3);
+
+ auto m0 = InterleaveLower(df, t0, t1);
+ auto m1 = InterleaveUpper(df, t0, t1);
+ auto m2 = InterleaveLower(df, t2, t3);
+ auto m3 = InterleaveUpper(df, t2, t3);
+
+ Store(ConcatLowerLower(df, m1, m0), df, mem);
+ Store(ConcatLowerLower(df, m3, m2), df, mem + Lanes(df));
+ Store(ConcatUpperUpper(df, m1, m0), df, mem + 2 * Lanes(df));
+ Store(ConcatUpperUpper(df, m3, m2), df, mem + 3 * Lanes(df));
+#else
+ auto t0 = InterleaveLower(df, v0, v2);
+ auto t1 = InterleaveLower(df, v1, v3);
+ auto t2 = InterleaveUpper(df, v0, v2);
+ auto t3 = InterleaveUpper(df, v1, v3);
+
+ auto m0 = InterleaveLower(df, t0, t1);
+ auto m1 = InterleaveUpper(df, t0, t1);
+ auto m2 = InterleaveLower(df, t2, t3);
+ auto m3 = InterleaveUpper(df, t2, t3);
+
+ Store(Concat4(df, Quarter<0>(df, m0), Quarter<0>(df, m1), Quarter<0>(df, m2),
+ Quarter<0>(df, m3)),
+ df, mem);
+ Store(Concat4(df, Quarter<1>(df, m0), Quarter<1>(df, m1), Quarter<1>(df, m2),
+ Quarter<1>(df, m3)),
+ df, mem + Lanes(df));
+ Store(Concat4(df, Quarter<2>(df, m0), Quarter<2>(df, m1), Quarter<2>(df, m2),
+ Quarter<2>(df, m3)),
+ df, mem + 2 * Lanes(df));
+ Store(Concat4(df, Quarter<3>(df, m0), Quarter<3>(df, m1), Quarter<3>(df, m2),
+ Quarter<3>(df, m3)),
+ df, mem + 3 * Lanes(df));
+#endif
+}
+
+// Stores v0[0], v1[0], v2[0], v3[0], v4[0], v5[0], v6[0], v7[0], v0[1] ... to
+// mem, in this order. Mem must be aligned.
+template <class DF, class V>
+void StoreInterleaved(const DF df, V v0, V v1, V v2, V v3, V v4, V v5, V v6,
+ V v7, float* mem) {
+#if HWY_TARGET == HWY_SCALAR
+ Store(v0, df, mem);
+ Store(v1, df, mem + 1);
+ Store(v2, df, mem + 2);
+ Store(v3, df, mem + 3);
+ Store(v4, df, mem + 4);
+ Store(v5, df, mem + 5);
+ Store(v6, df, mem + 6);
+ Store(v7, df, mem + 7);
+#elif !HWY_CAP_GE256
+ auto t0 = InterleaveLower(df, v0, v4);
+ auto t1 = InterleaveLower(df, v1, v5);
+ auto t2 = InterleaveLower(df, v2, v6);
+ auto t3 = InterleaveLower(df, v3, v7);
+ auto t4 = InterleaveUpper(df, v0, v4);
+ auto t5 = InterleaveUpper(df, v1, v5);
+ auto t6 = InterleaveUpper(df, v2, v6);
+ auto t7 = InterleaveUpper(df, v3, v7);
+
+ auto w0 = InterleaveLower(df, t0, t2);
+ auto w1 = InterleaveLower(df, t1, t3);
+ auto w2 = InterleaveUpper(df, t0, t2);
+ auto w3 = InterleaveUpper(df, t1, t3);
+ auto w4 = InterleaveLower(df, t4, t6);
+ auto w5 = InterleaveLower(df, t5, t7);
+ auto w6 = InterleaveUpper(df, t4, t6);
+ auto w7 = InterleaveUpper(df, t5, t7);
+
+ Store(InterleaveLower(df, w0, w1), df, mem);
+ Store(InterleaveUpper(df, w0, w1), df, mem + Lanes(df));
+ Store(InterleaveLower(df, w2, w3), df, mem + 2 * Lanes(df));
+ Store(InterleaveUpper(df, w2, w3), df, mem + 3 * Lanes(df));
+ Store(InterleaveLower(df, w4, w5), df, mem + 4 * Lanes(df));
+ Store(InterleaveUpper(df, w4, w5), df, mem + 5 * Lanes(df));
+ Store(InterleaveLower(df, w6, w7), df, mem + 6 * Lanes(df));
+ Store(InterleaveUpper(df, w6, w7), df, mem + 7 * Lanes(df));
+#elif !HWY_CAP_GE512
+ auto t0 = InterleaveLower(df, v0, v4);
+ auto t1 = InterleaveLower(df, v1, v5);
+ auto t2 = InterleaveLower(df, v2, v6);
+ auto t3 = InterleaveLower(df, v3, v7);
+ auto t4 = InterleaveUpper(df, v0, v4);
+ auto t5 = InterleaveUpper(df, v1, v5);
+ auto t6 = InterleaveUpper(df, v2, v6);
+ auto t7 = InterleaveUpper(df, v3, v7);
+
+ auto w0 = InterleaveLower(df, t0, t2);
+ auto w1 = InterleaveLower(df, t1, t3);
+ auto w2 = InterleaveUpper(df, t0, t2);
+ auto w3 = InterleaveUpper(df, t1, t3);
+ auto w4 = InterleaveLower(df, t4, t6);
+ auto w5 = InterleaveLower(df, t5, t7);
+ auto w6 = InterleaveUpper(df, t4, t6);
+ auto w7 = InterleaveUpper(df, t5, t7);
+
+ auto m0 = InterleaveLower(df, w0, w1);
+ auto m1 = InterleaveUpper(df, w0, w1);
+ auto m2 = InterleaveLower(df, w2, w3);
+ auto m3 = InterleaveUpper(df, w2, w3);
+ auto m4 = InterleaveLower(df, w4, w5);
+ auto m5 = InterleaveUpper(df, w4, w5);
+ auto m6 = InterleaveLower(df, w6, w7);
+ auto m7 = InterleaveUpper(df, w6, w7);
+
+ Store(ConcatLowerLower(df, m1, m0), df, mem);
+ Store(ConcatLowerLower(df, m3, m2), df, mem + Lanes(df));
+ Store(ConcatLowerLower(df, m5, m4), df, mem + 2 * Lanes(df));
+ Store(ConcatLowerLower(df, m7, m6), df, mem + 3 * Lanes(df));
+ Store(ConcatUpperUpper(df, m1, m0), df, mem + 4 * Lanes(df));
+ Store(ConcatUpperUpper(df, m3, m2), df, mem + 5 * Lanes(df));
+ Store(ConcatUpperUpper(df, m5, m4), df, mem + 6 * Lanes(df));
+ Store(ConcatUpperUpper(df, m7, m6), df, mem + 7 * Lanes(df));
+#else
+ auto t0 = InterleaveLower(df, v0, v4);
+ auto t1 = InterleaveLower(df, v1, v5);
+ auto t2 = InterleaveLower(df, v2, v6);
+ auto t3 = InterleaveLower(df, v3, v7);
+ auto t4 = InterleaveUpper(df, v0, v4);
+ auto t5 = InterleaveUpper(df, v1, v5);
+ auto t6 = InterleaveUpper(df, v2, v6);
+ auto t7 = InterleaveUpper(df, v3, v7);
+
+ auto w0 = InterleaveLower(df, t0, t2);
+ auto w1 = InterleaveLower(df, t1, t3);
+ auto w2 = InterleaveUpper(df, t0, t2);
+ auto w3 = InterleaveUpper(df, t1, t3);
+ auto w4 = InterleaveLower(df, t4, t6);
+ auto w5 = InterleaveLower(df, t5, t7);
+ auto w6 = InterleaveUpper(df, t4, t6);
+ auto w7 = InterleaveUpper(df, t5, t7);
+
+ auto m0 = InterleaveLower(df, w0, w1);
+ auto m1 = InterleaveUpper(df, w0, w1);
+ auto m2 = InterleaveLower(df, w2, w3);
+ auto m3 = InterleaveUpper(df, w2, w3);
+ auto m4 = InterleaveLower(df, w4, w5);
+ auto m5 = InterleaveUpper(df, w4, w5);
+ auto m6 = InterleaveLower(df, w6, w7);
+ auto m7 = InterleaveUpper(df, w6, w7);
+
+ Store(Concat4(df, Quarter<0>(df, m0), Quarter<0>(df, m1), Quarter<0>(df, m2),
+ Quarter<0>(df, m3)),
+ df, mem);
+ Store(Concat4(df, Quarter<0>(df, m4), Quarter<0>(df, m5), Quarter<0>(df, m6),
+ Quarter<0>(df, m7)),
+ df, mem + Lanes(df));
+ Store(Concat4(df, Quarter<1>(df, m0), Quarter<1>(df, m1), Quarter<1>(df, m2),
+ Quarter<1>(df, m3)),
+ df, mem + 2 * Lanes(df));
+ Store(Concat4(df, Quarter<1>(df, m4), Quarter<1>(df, m5), Quarter<1>(df, m6),
+ Quarter<1>(df, m7)),
+ df, mem + 3 * Lanes(df));
+ Store(Concat4(df, Quarter<2>(df, m0), Quarter<2>(df, m1), Quarter<2>(df, m2),
+ Quarter<2>(df, m3)),
+ df, mem + 4 * Lanes(df));
+ Store(Concat4(df, Quarter<2>(df, m4), Quarter<2>(df, m5), Quarter<2>(df, m6),
+ Quarter<2>(df, m7)),
+ df, mem + 5 * Lanes(df));
+ Store(Concat4(df, Quarter<3>(df, m0), Quarter<3>(df, m1), Quarter<3>(df, m2),
+ Quarter<3>(df, m3)),
+ df, mem + 6 * Lanes(df));
+ Store(Concat4(df, Quarter<3>(df, m4), Quarter<3>(df, m5), Quarter<3>(df, m6),
+ Quarter<3>(df, m7)),
+ df, mem + 7 * Lanes(df));
+#endif
+}
+
+#if HWY_CAP_GE256
+JXL_INLINE void Transpose8x8Block(const int32_t* JXL_RESTRICT from,
+ int32_t* JXL_RESTRICT to, size_t fromstride) {
+ const HWY_CAPPED(int32_t, 8) d;
+ auto i0 = Load(d, from);
+ auto i1 = Load(d, from + 1 * fromstride);
+ auto i2 = Load(d, from + 2 * fromstride);
+ auto i3 = Load(d, from + 3 * fromstride);
+ auto i4 = Load(d, from + 4 * fromstride);
+ auto i5 = Load(d, from + 5 * fromstride);
+ auto i6 = Load(d, from + 6 * fromstride);
+ auto i7 = Load(d, from + 7 * fromstride);
+
+ const auto q0 = InterleaveLower(d, i0, i2);
+ const auto q1 = InterleaveLower(d, i1, i3);
+ const auto q2 = InterleaveUpper(d, i0, i2);
+ const auto q3 = InterleaveUpper(d, i1, i3);
+ const auto q4 = InterleaveLower(d, i4, i6);
+ const auto q5 = InterleaveLower(d, i5, i7);
+ const auto q6 = InterleaveUpper(d, i4, i6);
+ const auto q7 = InterleaveUpper(d, i5, i7);
+
+ const auto r0 = InterleaveLower(d, q0, q1);
+ const auto r1 = InterleaveUpper(d, q0, q1);
+ const auto r2 = InterleaveLower(d, q2, q3);
+ const auto r3 = InterleaveUpper(d, q2, q3);
+ const auto r4 = InterleaveLower(d, q4, q5);
+ const auto r5 = InterleaveUpper(d, q4, q5);
+ const auto r6 = InterleaveLower(d, q6, q7);
+ const auto r7 = InterleaveUpper(d, q6, q7);
+
+ i0 = ConcatLowerLower(d, r4, r0);
+ i1 = ConcatLowerLower(d, r5, r1);
+ i2 = ConcatLowerLower(d, r6, r2);
+ i3 = ConcatLowerLower(d, r7, r3);
+ i4 = ConcatUpperUpper(d, r4, r0);
+ i5 = ConcatUpperUpper(d, r5, r1);
+ i6 = ConcatUpperUpper(d, r6, r2);
+ i7 = ConcatUpperUpper(d, r7, r3);
+
+ Store(i0, d, to);
+ Store(i1, d, to + 1 * 8);
+ Store(i2, d, to + 2 * 8);
+ Store(i3, d, to + 3 * 8);
+ Store(i4, d, to + 4 * 8);
+ Store(i5, d, to + 5 * 8);
+ Store(i6, d, to + 6 * 8);
+ Store(i7, d, to + 7 * 8);
+}
+#elif HWY_TARGET != HWY_SCALAR
+JXL_INLINE void Transpose8x8Block(const int32_t* JXL_RESTRICT from,
+ int32_t* JXL_RESTRICT to, size_t fromstride) {
+ const HWY_CAPPED(int32_t, 4) d;
+ for (size_t n = 0; n < 8; n += 4) {
+ for (size_t m = 0; m < 8; m += 4) {
+ auto p0 = Load(d, from + n * fromstride + m);
+ auto p1 = Load(d, from + (n + 1) * fromstride + m);
+ auto p2 = Load(d, from + (n + 2) * fromstride + m);
+ auto p3 = Load(d, from + (n + 3) * fromstride + m);
+ const auto q0 = InterleaveLower(d, p0, p2);
+ const auto q1 = InterleaveLower(d, p1, p3);
+ const auto q2 = InterleaveUpper(d, p0, p2);
+ const auto q3 = InterleaveUpper(d, p1, p3);
+
+ const auto r0 = InterleaveLower(d, q0, q1);
+ const auto r1 = InterleaveUpper(d, q0, q1);
+ const auto r2 = InterleaveLower(d, q2, q3);
+ const auto r3 = InterleaveUpper(d, q2, q3);
+ Store(r0, d, to + m * 8 + n);
+ Store(r1, d, to + (1 + m) * 8 + n);
+ Store(r2, d, to + (2 + m) * 8 + n);
+ Store(r3, d, to + (3 + m) * 8 + n);
+ }
+ }
+}
+
+#endif
+
+// NOLINTNEXTLINE(google-readability-namespace-comments)
+} // namespace HWY_NAMESPACE
+} // namespace jxl
+HWY_AFTER_NAMESPACE();
+
+#endif // LIB_JXL_SIMD_UTIL_INL_H_
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