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/*
* Copyright (c) 2024, Alliance for Open Media. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef AOM_AOM_DSP_ARM_AOM_NEON_SVE2_BRIDGE_H_
#define AOM_AOM_DSP_ARM_AOM_NEON_SVE2_BRIDGE_H_
#include <arm_neon_sve_bridge.h>
#include "config/aom_dsp_rtcd.h"
#include "config/aom_config.h"
// We can access instructions exclusive to the SVE2 instruction set from a
// predominantly Neon context by making use of the Neon-SVE bridge intrinsics
// to reinterpret Neon vectors as SVE vectors - with the high part of the SVE
// vector (if it's longer than 128 bits) being "don't care".
// While sub-optimal on machines that have SVE vector length > 128-bit - as the
// remainder of the vector is unused - this approach is still beneficial when
// compared to a Neon-only solution.
static INLINE int16x8_t aom_tbl2_s16(int16x8_t s0, int16x8_t s1,
uint16x8_t tbl) {
svint16x2_t samples = svcreate2_s16(svset_neonq_s16(svundef_s16(), s0),
svset_neonq_s16(svundef_s16(), s1));
return svget_neonq_s16(
svtbl2_s16(samples, svset_neonq_u16(svundef_u16(), tbl)));
}
#endif // AOM_AOM_DSP_ARM_AOM_NEON_SVE2_BRIDGE_H_
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