ref: f695b30ac2f8bac8af381c0436e88086fd4c7112
dir: /vpx_dsp/x86/transpose_sse2.h/
/*
* Copyright (c) 2015 The WebM 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 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 VPX_DSP_X86_TRANSPOSE_SSE2_H_
#define VPX_DSP_X86_TRANSPOSE_SSE2_H_
#include "./vpx_dsp_rtcd.h"
#include "vpx_dsp/x86/inv_txfm_sse2.h"
#include "vpx_dsp/x86/txfm_common_sse2.h"
static INLINE void transpose_16bit_4x4(__m128i *res) {
const __m128i tr0_0 = _mm_unpacklo_epi16(res[0], res[1]);
const __m128i tr0_1 = _mm_unpackhi_epi16(res[0], res[1]);
res[0] = _mm_unpacklo_epi16(tr0_0, tr0_1);
res[1] = _mm_unpackhi_epi16(tr0_0, tr0_1);
}
static INLINE void transpose_32bit_4x4(__m128i *const a0, __m128i *const a1,
__m128i *const a2, __m128i *const a3) {
// Unpack 32 bit elements. Goes from:
// a0: 00 01 02 03
// a1: 10 11 12 13
// a2: 20 21 22 23
// a3: 30 31 32 33
// to:
// b0: 00 10 01 11
// b1: 20 30 21 31
// b2: 02 12 03 13
// b3: 22 32 23 33
const __m128i b0 = _mm_unpacklo_epi32(*a0, *a1);
const __m128i b1 = _mm_unpacklo_epi32(*a2, *a3);
const __m128i b2 = _mm_unpackhi_epi32(*a0, *a1);
const __m128i b3 = _mm_unpackhi_epi32(*a2, *a3);
// Unpack 64 bit elements resulting in:
// a0: 00 10 20 30
// a1: 01 11 21 31
// a2: 02 12 22 32
// a3: 03 13 23 33
*a0 = _mm_unpacklo_epi64(b0, b1);
*a1 = _mm_unpackhi_epi64(b0, b1);
*a2 = _mm_unpacklo_epi64(b2, b3);
*a3 = _mm_unpackhi_epi64(b2, b3);
}
#endif // VPX_DSP_X86_TRANSPOSE_SSE2_H_