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/*
* Copyright (c) 2021 Loongson Technology Corporation Limited
* Contributed by Hao Chen <chenhao@loongson.cn>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/loongarch/loongson_intrinsics.h"
#include "h264_intrapred_lasx.h"
#define PRED16X16_PLANE \
ptrdiff_t stride_1, stride_2, stride_3, stride_4, stride_5, stride_6; \
ptrdiff_t stride_8, stride_15; \
int32_t res0, res1, res2, res3, cnt; \
uint8_t *src0, *src1; \
__m256i reg0, reg1, reg2, reg3, reg4; \
__m256i tmp0, tmp1, tmp2, tmp3; \
__m256i shuff = {0x0B040A0509060807, 0x0F000E010D020C03, 0, 0}; \
__m256i mult = {0x0004000300020001, 0x0008000700060005, 0, 0}; \
__m256i int_mult1 = {0x0000000100000000, 0x0000000300000002, \
0x0000000500000004, 0x0000000700000006}; \
\
stride_1 = -stride; \
stride_2 = stride << 1; \
stride_3 = stride_2 + stride; \
stride_4 = stride_2 << 1; \
stride_5 = stride_4 + stride; \
stride_6 = stride_3 << 1; \
stride_8 = stride_4 << 1; \
stride_15 = (stride_8 << 1) - stride; \
src0 = src - 1; \
src1 = src0 + stride_8; \
\
reg0 = __lasx_xvldx(src0, -stride); \
reg1 = __lasx_xvldx(src, (8 - stride)); \
reg0 = __lasx_xvilvl_d(reg1, reg0); \
reg0 = __lasx_xvshuf_b(reg0, reg0, shuff); \
reg0 = __lasx_xvhsubw_hu_bu(reg0, reg0); \
reg0 = __lasx_xvmul_h(reg0, mult); \
res1 = (src1[0] - src0[stride_6]) + \
2 * (src1[stride] - src0[stride_5]) + \
3 * (src1[stride_2] - src0[stride_4]) + \
4 * (src1[stride_3] - src0[stride_3]) + \
5 * (src1[stride_4] - src0[stride_2]) + \
6 * (src1[stride_5] - src0[stride]) + \
7 * (src1[stride_6] - src0[0]) + \
8 * (src0[stride_15] - src0[stride_1]); \
reg0 = __lasx_xvhaddw_w_h(reg0, reg0); \
reg0 = __lasx_xvhaddw_d_w(reg0, reg0); \
reg0 = __lasx_xvhaddw_q_d(reg0, reg0); \
res0 = __lasx_xvpickve2gr_w(reg0, 0); \
#define PRED16X16_PLANE_END \
res2 = (src0[stride_15] + src[15 - stride] + 1) << 4; \
res3 = 7 * (res0 + res1); \
res2 -= res3; \
reg0 = __lasx_xvreplgr2vr_w(res0); \
reg1 = __lasx_xvreplgr2vr_w(res1); \
reg2 = __lasx_xvreplgr2vr_w(res2); \
reg3 = __lasx_xvmul_w(reg0, int_mult1); \
reg4 = __lasx_xvslli_w(reg0, 3); \
reg4 = __lasx_xvadd_w(reg4, reg3); \
for (cnt = 8; cnt--;) { \
tmp0 = __lasx_xvadd_w(reg2, reg3); \
tmp1 = __lasx_xvadd_w(reg2, reg4); \
tmp0 = __lasx_xvssrani_hu_w(tmp1, tmp0, 5); \
tmp0 = __lasx_xvpermi_d(tmp0, 0xD8); \
reg2 = __lasx_xvadd_w(reg2, reg1); \
tmp2 = __lasx_xvadd_w(reg2, reg3); \
tmp3 = __lasx_xvadd_w(reg2, reg4); \
tmp1 = __lasx_xvssrani_hu_w(tmp3, tmp2, 5); \
tmp1 = __lasx_xvpermi_d(tmp1, 0xD8); \
tmp0 = __lasx_xvssrani_bu_h(tmp1, tmp0, 0); \
reg2 = __lasx_xvadd_w(reg2, reg1); \
__lasx_xvstelm_d(tmp0, src, 0, 0); \
__lasx_xvstelm_d(tmp0, src, 8, 2); \
src += stride; \
__lasx_xvstelm_d(tmp0, src, 0, 1); \
__lasx_xvstelm_d(tmp0, src, 8, 3); \
src += stride; \
}
void ff_h264_pred16x16_plane_h264_8_lasx(uint8_t *src, ptrdiff_t stride)
{
PRED16X16_PLANE
res0 = (5 * res0 + 32) >> 6;
res1 = (5 * res1 + 32) >> 6;
PRED16X16_PLANE_END
}
void ff_h264_pred16x16_plane_rv40_8_lasx(uint8_t *src, ptrdiff_t stride)
{
PRED16X16_PLANE
res0 = (res0 + (res0 >> 2)) >> 4;
res1 = (res1 + (res1 >> 2)) >> 4;
PRED16X16_PLANE_END
}
void ff_h264_pred16x16_plane_svq3_8_lasx(uint8_t *src, ptrdiff_t stride)
{
PRED16X16_PLANE
cnt = (5 * (res0/4)) / 16;
res0 = (5 * (res1/4)) / 16;
res1 = cnt;
PRED16X16_PLANE_END
}
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