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      1 /*
      2  *  Copyright (c) 2014 The WebM project authors. All Rights Reserved.
      3  *
      4  *  Use of this source code is governed by a BSD-style license
      5  *  that can be found in the LICENSE file in the root of the source
      6  *  tree. An additional intellectual property rights grant can be found
      7  *  in the file PATENTS.  All contributing project authors may
      8  *  be found in the AUTHORS file in the root of the source tree.
      9  */
     10 
     11 #include <arm_neon.h>
     12 
     13 #include "./vpx_config.h"
     14 #include "./vp8_rtcd.h"
     15 #include "vpx_ports/arm.h"
     16 
     17 #ifdef VPX_INCOMPATIBLE_GCC
     18 static INLINE void write_2x4(unsigned char *dst, int pitch,
     19                              const uint8x8x2_t result) {
     20   /*
     21    * uint8x8x2_t result
     22   00 01 02 03 | 04 05 06 07
     23   10 11 12 13 | 14 15 16 17
     24   ---
     25   * after vtrn_u8
     26   00 10 02 12 | 04 14 06 16
     27   01 11 03 13 | 05 15 07 17
     28   */
     29   const uint8x8x2_t r01_u8 = vtrn_u8(result.val[0], result.val[1]);
     30   const uint16x4_t x_0_4 = vreinterpret_u16_u8(r01_u8.val[0]);
     31   const uint16x4_t x_1_5 = vreinterpret_u16_u8(r01_u8.val[1]);
     32   vst1_lane_u16((uint16_t *)dst, x_0_4, 0);
     33   dst += pitch;
     34   vst1_lane_u16((uint16_t *)dst, x_1_5, 0);
     35   dst += pitch;
     36   vst1_lane_u16((uint16_t *)dst, x_0_4, 1);
     37   dst += pitch;
     38   vst1_lane_u16((uint16_t *)dst, x_1_5, 1);
     39   dst += pitch;
     40   vst1_lane_u16((uint16_t *)dst, x_0_4, 2);
     41   dst += pitch;
     42   vst1_lane_u16((uint16_t *)dst, x_1_5, 2);
     43   dst += pitch;
     44   vst1_lane_u16((uint16_t *)dst, x_0_4, 3);
     45   dst += pitch;
     46   vst1_lane_u16((uint16_t *)dst, x_1_5, 3);
     47 }
     48 
     49 static INLINE void write_2x8(unsigned char *dst, int pitch,
     50                              const uint8x8x2_t result,
     51                              const uint8x8x2_t result2) {
     52   write_2x4(dst, pitch, result);
     53   dst += pitch * 8;
     54   write_2x4(dst, pitch, result2);
     55 }
     56 #else
     57 static INLINE void write_2x8(unsigned char *dst, int pitch,
     58                              const uint8x8x2_t result,
     59                              const uint8x8x2_t result2) {
     60   vst2_lane_u8(dst, result, 0);
     61   dst += pitch;
     62   vst2_lane_u8(dst, result, 1);
     63   dst += pitch;
     64   vst2_lane_u8(dst, result, 2);
     65   dst += pitch;
     66   vst2_lane_u8(dst, result, 3);
     67   dst += pitch;
     68   vst2_lane_u8(dst, result, 4);
     69   dst += pitch;
     70   vst2_lane_u8(dst, result, 5);
     71   dst += pitch;
     72   vst2_lane_u8(dst, result, 6);
     73   dst += pitch;
     74   vst2_lane_u8(dst, result, 7);
     75   dst += pitch;
     76 
     77   vst2_lane_u8(dst, result2, 0);
     78   dst += pitch;
     79   vst2_lane_u8(dst, result2, 1);
     80   dst += pitch;
     81   vst2_lane_u8(dst, result2, 2);
     82   dst += pitch;
     83   vst2_lane_u8(dst, result2, 3);
     84   dst += pitch;
     85   vst2_lane_u8(dst, result2, 4);
     86   dst += pitch;
     87   vst2_lane_u8(dst, result2, 5);
     88   dst += pitch;
     89   vst2_lane_u8(dst, result2, 6);
     90   dst += pitch;
     91   vst2_lane_u8(dst, result2, 7);
     92 }
     93 #endif  // VPX_INCOMPATIBLE_GCC
     94 
     95 #ifdef VPX_INCOMPATIBLE_GCC
     96 static INLINE uint8x8x4_t read_4x8(unsigned char *src, int pitch) {
     97   uint8x8x4_t x;
     98   const uint8x8_t a = vld1_u8(src);
     99   const uint8x8_t b = vld1_u8(src + pitch * 1);
    100   const uint8x8_t c = vld1_u8(src + pitch * 2);
    101   const uint8x8_t d = vld1_u8(src + pitch * 3);
    102   const uint8x8_t e = vld1_u8(src + pitch * 4);
    103   const uint8x8_t f = vld1_u8(src + pitch * 5);
    104   const uint8x8_t g = vld1_u8(src + pitch * 6);
    105   const uint8x8_t h = vld1_u8(src + pitch * 7);
    106   const uint32x2x2_t r04_u32 =
    107       vtrn_u32(vreinterpret_u32_u8(a), vreinterpret_u32_u8(e));
    108   const uint32x2x2_t r15_u32 =
    109       vtrn_u32(vreinterpret_u32_u8(b), vreinterpret_u32_u8(f));
    110   const uint32x2x2_t r26_u32 =
    111       vtrn_u32(vreinterpret_u32_u8(c), vreinterpret_u32_u8(g));
    112   const uint32x2x2_t r37_u32 =
    113       vtrn_u32(vreinterpret_u32_u8(d), vreinterpret_u32_u8(h));
    114   const uint16x4x2_t r02_u16 = vtrn_u16(vreinterpret_u16_u32(r04_u32.val[0]),
    115                                         vreinterpret_u16_u32(r26_u32.val[0]));
    116   const uint16x4x2_t r13_u16 = vtrn_u16(vreinterpret_u16_u32(r15_u32.val[0]),
    117                                         vreinterpret_u16_u32(r37_u32.val[0]));
    118   const uint8x8x2_t r01_u8 = vtrn_u8(vreinterpret_u8_u16(r02_u16.val[0]),
    119                                      vreinterpret_u8_u16(r13_u16.val[0]));
    120   const uint8x8x2_t r23_u8 = vtrn_u8(vreinterpret_u8_u16(r02_u16.val[1]),
    121                                      vreinterpret_u8_u16(r13_u16.val[1]));
    122   /*
    123    * after vtrn_u32
    124   00 01 02 03 | 40 41 42 43
    125   10 11 12 13 | 50 51 52 53
    126   20 21 22 23 | 60 61 62 63
    127   30 31 32 33 | 70 71 72 73
    128   ---
    129   * after vtrn_u16
    130   00 01 20 21 | 40 41 60 61
    131   02 03 22 23 | 42 43 62 63
    132   10 11 30 31 | 50 51 70 71
    133   12 13 32 33 | 52 52 72 73
    134 
    135   00 01 20 21 | 40 41 60 61
    136   10 11 30 31 | 50 51 70 71
    137   02 03 22 23 | 42 43 62 63
    138   12 13 32 33 | 52 52 72 73
    139   ---
    140   * after vtrn_u8
    141   00 10 20 30 | 40 50 60 70
    142   01 11 21 31 | 41 51 61 71
    143   02 12 22 32 | 42 52 62 72
    144   03 13 23 33 | 43 53 63 73
    145   */
    146   x.val[0] = r01_u8.val[0];
    147   x.val[1] = r01_u8.val[1];
    148   x.val[2] = r23_u8.val[0];
    149   x.val[3] = r23_u8.val[1];
    150 
    151   return x;
    152 }
    153 #else
    154 static INLINE uint8x8x4_t read_4x8(unsigned char *src, int pitch) {
    155   uint8x8x4_t x;
    156   x.val[0] = x.val[1] = x.val[2] = x.val[3] = vdup_n_u8(0);
    157   x = vld4_lane_u8(src, x, 0);
    158   src += pitch;
    159   x = vld4_lane_u8(src, x, 1);
    160   src += pitch;
    161   x = vld4_lane_u8(src, x, 2);
    162   src += pitch;
    163   x = vld4_lane_u8(src, x, 3);
    164   src += pitch;
    165   x = vld4_lane_u8(src, x, 4);
    166   src += pitch;
    167   x = vld4_lane_u8(src, x, 5);
    168   src += pitch;
    169   x = vld4_lane_u8(src, x, 6);
    170   src += pitch;
    171   x = vld4_lane_u8(src, x, 7);
    172   return x;
    173 }
    174 #endif  // VPX_INCOMPATIBLE_GCC
    175 
    176 static INLINE void vp8_loop_filter_simple_vertical_edge_neon(
    177     unsigned char *s, int p, const unsigned char *blimit) {
    178   unsigned char *src1;
    179   uint8x16_t qblimit, q0u8;
    180   uint8x16_t q3u8, q4u8, q5u8, q6u8, q7u8, q11u8, q12u8, q14u8, q15u8;
    181   int16x8_t q2s16, q13s16, q11s16;
    182   int8x8_t d28s8, d29s8;
    183   int8x16_t q2s8, q3s8, q10s8, q11s8, q14s8;
    184   uint8x8x4_t d0u8x4;  // d6, d7, d8, d9
    185   uint8x8x4_t d1u8x4;  // d10, d11, d12, d13
    186   uint8x8x2_t d2u8x2;  // d12, d13
    187   uint8x8x2_t d3u8x2;  // d14, d15
    188 
    189   qblimit = vdupq_n_u8(*blimit);
    190 
    191   src1 = s - 2;
    192   d0u8x4 = read_4x8(src1, p);
    193   src1 += p * 8;
    194   d1u8x4 = read_4x8(src1, p);
    195 
    196   q3u8 = vcombine_u8(d0u8x4.val[0], d1u8x4.val[0]);  // d6 d10
    197   q4u8 = vcombine_u8(d0u8x4.val[2], d1u8x4.val[2]);  // d8 d12
    198   q5u8 = vcombine_u8(d0u8x4.val[1], d1u8x4.val[1]);  // d7 d11
    199   q6u8 = vcombine_u8(d0u8x4.val[3], d1u8x4.val[3]);  // d9 d13
    200 
    201   q15u8 = vabdq_u8(q5u8, q4u8);
    202   q14u8 = vabdq_u8(q3u8, q6u8);
    203 
    204   q15u8 = vqaddq_u8(q15u8, q15u8);
    205   q14u8 = vshrq_n_u8(q14u8, 1);
    206   q0u8 = vdupq_n_u8(0x80);
    207   q11s16 = vdupq_n_s16(3);
    208   q15u8 = vqaddq_u8(q15u8, q14u8);
    209 
    210   q3u8 = veorq_u8(q3u8, q0u8);
    211   q4u8 = veorq_u8(q4u8, q0u8);
    212   q5u8 = veorq_u8(q5u8, q0u8);
    213   q6u8 = veorq_u8(q6u8, q0u8);
    214 
    215   q15u8 = vcgeq_u8(qblimit, q15u8);
    216 
    217   q2s16 = vsubl_s8(vget_low_s8(vreinterpretq_s8_u8(q4u8)),
    218                    vget_low_s8(vreinterpretq_s8_u8(q5u8)));
    219   q13s16 = vsubl_s8(vget_high_s8(vreinterpretq_s8_u8(q4u8)),
    220                     vget_high_s8(vreinterpretq_s8_u8(q5u8)));
    221 
    222   q14s8 = vqsubq_s8(vreinterpretq_s8_u8(q3u8), vreinterpretq_s8_u8(q6u8));
    223 
    224   q2s16 = vmulq_s16(q2s16, q11s16);
    225   q13s16 = vmulq_s16(q13s16, q11s16);
    226 
    227   q11u8 = vdupq_n_u8(3);
    228   q12u8 = vdupq_n_u8(4);
    229 
    230   q2s16 = vaddw_s8(q2s16, vget_low_s8(q14s8));
    231   q13s16 = vaddw_s8(q13s16, vget_high_s8(q14s8));
    232 
    233   d28s8 = vqmovn_s16(q2s16);
    234   d29s8 = vqmovn_s16(q13s16);
    235   q14s8 = vcombine_s8(d28s8, d29s8);
    236 
    237   q14s8 = vandq_s8(q14s8, vreinterpretq_s8_u8(q15u8));
    238 
    239   q2s8 = vqaddq_s8(q14s8, vreinterpretq_s8_u8(q11u8));
    240   q3s8 = vqaddq_s8(q14s8, vreinterpretq_s8_u8(q12u8));
    241   q2s8 = vshrq_n_s8(q2s8, 3);
    242   q14s8 = vshrq_n_s8(q3s8, 3);
    243 
    244   q11s8 = vqaddq_s8(vreinterpretq_s8_u8(q5u8), q2s8);
    245   q10s8 = vqsubq_s8(vreinterpretq_s8_u8(q4u8), q14s8);
    246 
    247   q6u8 = veorq_u8(vreinterpretq_u8_s8(q11s8), q0u8);
    248   q7u8 = veorq_u8(vreinterpretq_u8_s8(q10s8), q0u8);
    249 
    250   d2u8x2.val[0] = vget_low_u8(q6u8);   // d12
    251   d2u8x2.val[1] = vget_low_u8(q7u8);   // d14
    252   d3u8x2.val[0] = vget_high_u8(q6u8);  // d13
    253   d3u8x2.val[1] = vget_high_u8(q7u8);  // d15
    254 
    255   src1 = s - 1;
    256   write_2x8(src1, p, d2u8x2, d3u8x2);
    257 }
    258 
    259 void vp8_loop_filter_bvs_neon(unsigned char *y_ptr, int y_stride,
    260                               const unsigned char *blimit) {
    261   y_ptr += 4;
    262   vp8_loop_filter_simple_vertical_edge_neon(y_ptr, y_stride, blimit);
    263   y_ptr += 4;
    264   vp8_loop_filter_simple_vertical_edge_neon(y_ptr, y_stride, blimit);
    265   y_ptr += 4;
    266   vp8_loop_filter_simple_vertical_edge_neon(y_ptr, y_stride, blimit);
    267   return;
    268 }
    269 
    270 void vp8_loop_filter_mbvs_neon(unsigned char *y_ptr, int y_stride,
    271                                const unsigned char *blimit) {
    272   vp8_loop_filter_simple_vertical_edge_neon(y_ptr, y_stride, blimit);
    273   return;
    274 }
    275