1/******************************************************************************
2 *
3 * Copyright (C) 2015 The Android Open Source Project
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 *****************************************************************************
18 * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
19*/
20/**
21 *******************************************************************************
22 * @file
23 *  ih264_ihadamard_scaling_sse42.c
24 *
25 * @brief
26 *  Contains definition of functions for h264 inverse hadamard 4x4 transform and scaling
27 *
28 * @author
29 *  Mohit
30 *
31 *  @par List of Functions:
32 *  - ih264_ihadamard_scaling_4x4_sse42()
33 *  - ih264_ihadamard_scaling_2x2_uv_ssse42()
34 *
35 * @remarks
36 *
37 *******************************************************************************
38 */
39/*****************************************************************************/
40/* File Includes                                                             */
41/*****************************************************************************/
42
43/* User include files */
44#include "ih264_typedefs.h"
45#include "ih264_defs.h"
46#include "ih264_trans_macros.h"
47#include "ih264_macros.h"
48#include "ih264_trans_data.h"
49#include "ih264_size_defs.h"
50#include "ih264_structs.h"
51#include "ih264_trans_quant_itrans_iquant.h"
52#include <immintrin.h>
53
54/*
55 ********************************************************************************
56 *
57 * @brief This function performs a 4x4 inverse hadamard transform on the 4x4 DC coefficients
58 * of a 16x16 intra prediction macroblock, and then performs scaling.
59 * prediction buffer
60 *
61 * @par Description:
62 *  The DC coefficients pass through a 2-stage inverse hadamard transform.
63 *  This inverse transformed content is scaled to based on Qp value.
64 *
65 * @param[in] pi2_src
66 *  input 4x4 block of DC coefficients
67 *
68 * @param[out] pi2_out
69 *  output 4x4 block
70 *
71 * @param[in] pu2_iscal_mat
72 *  pointer to scaling list
73 *
74 * @param[in] pu2_weigh_mat
75 *  pointer to weight matrix
76 *
77 * @param[in] u4_qp_div_6
78 *  Floor (qp/6)
79 *
80 * @param[in] pi4_tmp
81 * temporary buffer of size 1*16
82 *
83 * @returns none
84 *
85 * @remarks none
86 *
87 *******************************************************************************
88 */
89void ih264_ihadamard_scaling_4x4_sse42(WORD16* pi2_src,
90                                       WORD16* pi2_out,
91                                       const UWORD16 *pu2_iscal_mat,
92                                       const UWORD16 *pu2_weigh_mat,
93                                       UWORD32 u4_qp_div_6,
94                                       WORD32* pi4_tmp)
95{
96    __m128i src_r0_r1, src_r2_r3;
97    __m128i src_r0, src_r1, src_r2, src_r3;
98    __m128i temp0, temp1, temp2, temp3;
99    __m128i add_rshift = _mm_set1_epi32((1 << (5 - u4_qp_div_6)));
100    __m128i mult_val = _mm_set1_epi32(pu2_iscal_mat[0] * pu2_weigh_mat[0]);
101    UNUSED (pi4_tmp);
102
103    src_r0_r1 = _mm_loadu_si128((__m128i *) (pi2_src)); //a00 a01 a02 a03 a10 a11 a12 a13 -- the source matrix 0th,1st row
104    src_r2_r3 = _mm_loadu_si128((__m128i *) (pi2_src + 8)); //a20 a21 a22 a23 a30 a31 a32 a33 -- the source matrix 2nd,3rd row
105    //sign_reg = _mm_cmpgt_epi16(zero_8x16b, src_r0_r1);
106    src_r0 = _mm_cvtepi16_epi32(src_r0_r1);
107    src_r0_r1 = _mm_srli_si128(src_r0_r1, 8);
108    src_r1 = _mm_cvtepi16_epi32(src_r0_r1);
109
110    src_r2 = _mm_cvtepi16_epi32(src_r2_r3);
111    src_r2_r3 = _mm_srli_si128(src_r2_r3, 8);
112    src_r3 = _mm_cvtepi16_epi32(src_r2_r3);
113
114    /* Perform Inverse transform */
115    /*-------------------------------------------------------------*/
116    /* IDCT [ Horizontal transformation ]                          */
117    /*-------------------------------------------------------------*/
118    // Matrix transpose
119    /*
120     *  a0 a1 a2 a3
121     *  b0 b1 b2 b3
122     *  c0 c1 c2 c3
123     *  d0 d1 d2 d3
124     */
125    temp0 = _mm_unpacklo_epi32(src_r0, src_r1);                  //a0 b0 a1 b1
126    temp2 = _mm_unpacklo_epi32(src_r2, src_r3);                  //c0 d0 c1 d1
127    temp1 = _mm_unpackhi_epi32(src_r0, src_r1);                  //a2 b2 a3 b3
128    temp3 = _mm_unpackhi_epi32(src_r2, src_r3);                  //c2 d2 c3 d3
129    src_r0 = _mm_unpacklo_epi64(temp0, temp2);                    //a0 b0 c0 d0
130    src_r1 = _mm_unpackhi_epi64(temp0, temp2);                    //a1 b1 c1 d1
131    src_r2 = _mm_unpacklo_epi64(temp1, temp3);                    //a2 b2 c2 d2
132    src_r3 = _mm_unpackhi_epi64(temp1, temp3);                    //a3 b3 c3 d3
133
134    temp0 = _mm_add_epi32(src_r0, src_r3);
135    temp1 = _mm_add_epi32(src_r1, src_r2);
136    temp2 = _mm_sub_epi32(src_r1, src_r2);
137    temp3 = _mm_sub_epi32(src_r0, src_r3);
138
139    src_r0 = _mm_add_epi32(temp0, temp1);
140    src_r1 = _mm_add_epi32(temp2, temp3);
141    src_r2 = _mm_sub_epi32(temp0, temp1);
142    src_r3 = _mm_sub_epi32(temp3, temp2);
143
144    /*-------------------------------------------------------------*/
145    /* IDCT [ Vertical transformation ]                          */
146    /*-------------------------------------------------------------*/
147    // Matrix transpose
148    /*
149     *  a0 b0 c0 d0
150     *  a1 b1 c1 d1
151     *  a2 b2 c2 d2
152     *  a3 b3 c3 d3
153     */
154    temp0 = _mm_unpacklo_epi32(src_r0, src_r1);                  //a0 a1 b0 b1
155    temp2 = _mm_unpacklo_epi32(src_r2, src_r3);                  //a2 a3 b2 b3
156    temp1 = _mm_unpackhi_epi32(src_r0, src_r1);                  //c0 c1 d0 d1
157    temp3 = _mm_unpackhi_epi32(src_r2, src_r3);                  //c2 c3 d2 d3
158    src_r0 = _mm_unpacklo_epi64(temp0, temp2);                   //a0 a1 a2 a3
159    src_r1 = _mm_unpackhi_epi64(temp0, temp2);                   //b0 b1 b2 b3
160    src_r2 = _mm_unpacklo_epi64(temp1, temp3);                   //c0 c1 c2 c3
161    src_r3 = _mm_unpackhi_epi64(temp1, temp3);                   //d0 d1 d2 d3
162
163    temp0 = _mm_add_epi32(src_r0, src_r3);
164    temp1 = _mm_add_epi32(src_r1, src_r2);
165    temp2 = _mm_sub_epi32(src_r1, src_r2);
166    temp3 = _mm_sub_epi32(src_r0, src_r3);
167
168    src_r0 = _mm_add_epi32(temp0, temp1);
169    src_r1 = _mm_add_epi32(temp2, temp3);
170    src_r2 = _mm_sub_epi32(temp0, temp1);
171    src_r3 = _mm_sub_epi32(temp3, temp2);
172
173    src_r0 = _mm_mullo_epi32(src_r0, mult_val);
174    src_r1 = _mm_mullo_epi32(src_r1, mult_val);
175    src_r2 = _mm_mullo_epi32(src_r2, mult_val);
176    src_r3 = _mm_mullo_epi32(src_r3, mult_val);
177
178    //Scaling
179    if(u4_qp_div_6 >= 6)
180    {
181        src_r0 = _mm_slli_epi32(src_r0, u4_qp_div_6 - 6);
182        src_r1 = _mm_slli_epi32(src_r1, u4_qp_div_6 - 6);
183        src_r2 = _mm_slli_epi32(src_r2, u4_qp_div_6 - 6);
184        src_r3 = _mm_slli_epi32(src_r3, u4_qp_div_6 - 6);
185    }
186    else
187    {
188        temp0 = _mm_add_epi32(src_r0, add_rshift);
189        temp1 = _mm_add_epi32(src_r1, add_rshift);
190        temp2 = _mm_add_epi32(src_r2, add_rshift);
191        temp3 = _mm_add_epi32(src_r3, add_rshift);
192        src_r0 = _mm_srai_epi32(temp0, 6 - u4_qp_div_6);
193        src_r1 = _mm_srai_epi32(temp1, 6 - u4_qp_div_6);
194        src_r2 = _mm_srai_epi32(temp2, 6 - u4_qp_div_6);
195        src_r3 = _mm_srai_epi32(temp3, 6 - u4_qp_div_6);
196    }
197    src_r0_r1 = _mm_packs_epi32(src_r0, src_r1);
198    src_r2_r3 = _mm_packs_epi32(src_r2, src_r3);
199
200    _mm_storeu_si128((__m128i *) (&pi2_out[0]), src_r0_r1);
201    _mm_storeu_si128((__m128i *) (&pi2_out[8]), src_r2_r3);
202}
203
204void ih264_ihadamard_scaling_2x2_uv_sse42(WORD16* pi2_src,
205                                          WORD16* pi2_out,
206                                          const UWORD16 *pu2_iscal_mat,
207                                          const UWORD16 *pu2_weigh_mat,
208                                          UWORD32 u4_qp_div_6,
209                                          WORD32* pi4_tmp)
210{
211    __m128i src, plane_0, plane_1, temp0, temp1, sign_reg;
212    __m128i zero_8x16b = _mm_setzero_si128();
213    __m128i scale_val = _mm_set1_epi32((WORD32)(pu2_iscal_mat[0] * pu2_weigh_mat[0]));
214    UNUSED(pi4_tmp);
215
216    src = _mm_loadu_si128((__m128i *) pi2_src);         //a0 a1 a2 a3 b0 b1 b2 b3
217    sign_reg = _mm_cmpgt_epi16(zero_8x16b, src);
218    plane_0 = _mm_unpacklo_epi16(src, sign_reg);        //a0 a1 a2 a3 -- 32 bits
219    plane_1 = _mm_unpackhi_epi16(src, sign_reg);        //b0 b1 b2 b3 -- 32 bits
220
221    temp0 = _mm_hadd_epi32(plane_0, plane_1);           //a0+a1 a2+a3 b0+b1 b2+b3
222    temp1 = _mm_hsub_epi32(plane_0, plane_1);           //a0-a1 a2-a3 b0-b1 b2-b3
223    plane_0 = _mm_hadd_epi32(temp0, temp1);             //a0+a1+a2+a3 b0+b1+b2+b3 a0-a1+a2-a3 b0-b1+b2-b3
224    plane_1 = _mm_hsub_epi32(temp0, temp1);             //a0+a1-a2-a3 b0+b1-b2-b3 a0-a1-a2+a3 b0-b1-b2+b3
225    temp0 = _mm_unpacklo_epi32(plane_0, plane_1);       //a0+a1+a2+a3 a0+a1-a2-a3 b0+b1+b2+b3 b0+b1-b2-b3
226    temp1 = _mm_unpackhi_epi32(plane_0, plane_1);       //a0-a1+a2-a3 a0-a1-a2+a3 b0-b1+b2-b3 b0-b1-b2+b3
227
228    plane_0 = _mm_unpacklo_epi64(temp0, temp1);         //a0+a1+a2+a3 a0+a1-a2-a3 a0-a1+a2-a3 a0-a1-a2+a3
229    plane_1 = _mm_unpackhi_epi64(temp0, temp1);         //b0+b1+b2+b3 b0+b1-b2-b3 b0-b1+b2-b3 b0-b1-b2+b3
230
231    plane_0 = _mm_shuffle_epi32(plane_0, 0xd8);         //a0+a1+a2+a3 a0-a1+a2-a3 a0+a1-a2-a3 a0-a1-a2+a3
232    plane_1 = _mm_shuffle_epi32(plane_1, 0xd8);         //b0+b1+b2+b3 b0-b1+b2-b3 b0+b1-b2-b3 b0-b1-b2+b3
233
234    temp0 = _mm_mullo_epi32(scale_val, plane_0);        //multiply by pu2_iscal_mat[0] * pu2_weigh_mat[0]
235    temp1 = _mm_mullo_epi32(scale_val, plane_1);        //multiply by pu2_iscal_mat[0] * pu2_weigh_mat[0]
236
237    temp0 = _mm_slli_epi32(temp0, u4_qp_div_6);
238    temp1 = _mm_slli_epi32(temp1, u4_qp_div_6);
239
240    temp0 = _mm_srai_epi32(temp0, 5);
241    temp1 = _mm_srai_epi32(temp1, 5);
242
243    temp0 = _mm_packs_epi32(temp0, temp1);              //Final values are 16-bits only.
244
245    _mm_storeu_si128((__m128i *) (&pi2_out[0]), temp0);
246
247}
248