1 /* 2 * Copyright (c) 2015 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 #include <assert.h> 13 14 #include "./vpx_dsp_rtcd.h" 15 #include "./vpx_config.h" 16 17 #include "vpx/vpx_integer.h" 18 #include "vpx_dsp/arm/idct_neon.h" 19 #include "vpx_dsp/arm/mem_neon.h" 20 21 static INLINE unsigned int horizontal_add_u16x8(const uint16x8_t v_16x8) { 22 const uint32x4_t a = vpaddlq_u16(v_16x8); 23 const uint64x2_t b = vpaddlq_u32(a); 24 const uint32x2_t c = vadd_u32(vreinterpret_u32_u64(vget_low_u64(b)), 25 vreinterpret_u32_u64(vget_high_u64(b))); 26 return vget_lane_u32(c, 0); 27 } 28 29 unsigned int vpx_avg_4x4_neon(const uint8_t *s, int p) { 30 uint16x8_t v_sum; 31 uint32x2_t v_s0 = vdup_n_u32(0); 32 uint32x2_t v_s1 = vdup_n_u32(0); 33 v_s0 = vld1_lane_u32((const uint32_t *)s, v_s0, 0); 34 v_s0 = vld1_lane_u32((const uint32_t *)(s + p), v_s0, 1); 35 v_s1 = vld1_lane_u32((const uint32_t *)(s + 2 * p), v_s1, 0); 36 v_s1 = vld1_lane_u32((const uint32_t *)(s + 3 * p), v_s1, 1); 37 v_sum = vaddl_u8(vreinterpret_u8_u32(v_s0), vreinterpret_u8_u32(v_s1)); 38 return (horizontal_add_u16x8(v_sum) + 8) >> 4; 39 } 40 41 unsigned int vpx_avg_8x8_neon(const uint8_t *s, int p) { 42 uint8x8_t v_s0 = vld1_u8(s); 43 const uint8x8_t v_s1 = vld1_u8(s + p); 44 uint16x8_t v_sum = vaddl_u8(v_s0, v_s1); 45 46 v_s0 = vld1_u8(s + 2 * p); 47 v_sum = vaddw_u8(v_sum, v_s0); 48 49 v_s0 = vld1_u8(s + 3 * p); 50 v_sum = vaddw_u8(v_sum, v_s0); 51 52 v_s0 = vld1_u8(s + 4 * p); 53 v_sum = vaddw_u8(v_sum, v_s0); 54 55 v_s0 = vld1_u8(s + 5 * p); 56 v_sum = vaddw_u8(v_sum, v_s0); 57 58 v_s0 = vld1_u8(s + 6 * p); 59 v_sum = vaddw_u8(v_sum, v_s0); 60 61 v_s0 = vld1_u8(s + 7 * p); 62 v_sum = vaddw_u8(v_sum, v_s0); 63 64 return (horizontal_add_u16x8(v_sum) + 32) >> 6; 65 } 66 67 // coeff: 16 bits, dynamic range [-32640, 32640]. 68 // length: value range {16, 64, 256, 1024}. 69 int vpx_satd_neon(const tran_low_t *coeff, int length) { 70 const int16x4_t zero = vdup_n_s16(0); 71 int32x4_t accum = vdupq_n_s32(0); 72 73 do { 74 const int16x8_t src0 = load_tran_low_to_s16q(coeff); 75 const int16x8_t src8 = load_tran_low_to_s16q(coeff + 8); 76 accum = vabal_s16(accum, vget_low_s16(src0), zero); 77 accum = vabal_s16(accum, vget_high_s16(src0), zero); 78 accum = vabal_s16(accum, vget_low_s16(src8), zero); 79 accum = vabal_s16(accum, vget_high_s16(src8), zero); 80 length -= 16; 81 coeff += 16; 82 } while (length != 0); 83 84 { 85 // satd: 26 bits, dynamic range [-32640 * 1024, 32640 * 1024] 86 const int64x2_t s0 = vpaddlq_s32(accum); // cascading summation of 'accum'. 87 const int32x2_t s1 = vadd_s32(vreinterpret_s32_s64(vget_low_s64(s0)), 88 vreinterpret_s32_s64(vget_high_s64(s0))); 89 const int satd = vget_lane_s32(s1, 0); 90 return satd; 91 } 92 } 93 94 void vpx_int_pro_row_neon(int16_t hbuf[16], uint8_t const *ref, 95 const int ref_stride, const int height) { 96 int i; 97 uint16x8_t vec_sum_lo = vdupq_n_u16(0); 98 uint16x8_t vec_sum_hi = vdupq_n_u16(0); 99 const int shift_factor = ((height >> 5) + 3) * -1; 100 const int16x8_t vec_shift = vdupq_n_s16(shift_factor); 101 102 for (i = 0; i < height; i += 8) { 103 const uint8x16_t vec_row1 = vld1q_u8(ref); 104 const uint8x16_t vec_row2 = vld1q_u8(ref + ref_stride); 105 const uint8x16_t vec_row3 = vld1q_u8(ref + ref_stride * 2); 106 const uint8x16_t vec_row4 = vld1q_u8(ref + ref_stride * 3); 107 const uint8x16_t vec_row5 = vld1q_u8(ref + ref_stride * 4); 108 const uint8x16_t vec_row6 = vld1q_u8(ref + ref_stride * 5); 109 const uint8x16_t vec_row7 = vld1q_u8(ref + ref_stride * 6); 110 const uint8x16_t vec_row8 = vld1q_u8(ref + ref_stride * 7); 111 112 vec_sum_lo = vaddw_u8(vec_sum_lo, vget_low_u8(vec_row1)); 113 vec_sum_hi = vaddw_u8(vec_sum_hi, vget_high_u8(vec_row1)); 114 115 vec_sum_lo = vaddw_u8(vec_sum_lo, vget_low_u8(vec_row2)); 116 vec_sum_hi = vaddw_u8(vec_sum_hi, vget_high_u8(vec_row2)); 117 118 vec_sum_lo = vaddw_u8(vec_sum_lo, vget_low_u8(vec_row3)); 119 vec_sum_hi = vaddw_u8(vec_sum_hi, vget_high_u8(vec_row3)); 120 121 vec_sum_lo = vaddw_u8(vec_sum_lo, vget_low_u8(vec_row4)); 122 vec_sum_hi = vaddw_u8(vec_sum_hi, vget_high_u8(vec_row4)); 123 124 vec_sum_lo = vaddw_u8(vec_sum_lo, vget_low_u8(vec_row5)); 125 vec_sum_hi = vaddw_u8(vec_sum_hi, vget_high_u8(vec_row5)); 126 127 vec_sum_lo = vaddw_u8(vec_sum_lo, vget_low_u8(vec_row6)); 128 vec_sum_hi = vaddw_u8(vec_sum_hi, vget_high_u8(vec_row6)); 129 130 vec_sum_lo = vaddw_u8(vec_sum_lo, vget_low_u8(vec_row7)); 131 vec_sum_hi = vaddw_u8(vec_sum_hi, vget_high_u8(vec_row7)); 132 133 vec_sum_lo = vaddw_u8(vec_sum_lo, vget_low_u8(vec_row8)); 134 vec_sum_hi = vaddw_u8(vec_sum_hi, vget_high_u8(vec_row8)); 135 136 ref += ref_stride * 8; 137 } 138 139 vec_sum_lo = vshlq_u16(vec_sum_lo, vec_shift); 140 vec_sum_hi = vshlq_u16(vec_sum_hi, vec_shift); 141 142 vst1q_s16(hbuf, vreinterpretq_s16_u16(vec_sum_lo)); 143 hbuf += 8; 144 vst1q_s16(hbuf, vreinterpretq_s16_u16(vec_sum_hi)); 145 } 146 147 int16_t vpx_int_pro_col_neon(uint8_t const *ref, const int width) { 148 int i; 149 uint16x8_t vec_sum = vdupq_n_u16(0); 150 151 for (i = 0; i < width; i += 16) { 152 const uint8x16_t vec_row = vld1q_u8(ref); 153 vec_sum = vaddw_u8(vec_sum, vget_low_u8(vec_row)); 154 vec_sum = vaddw_u8(vec_sum, vget_high_u8(vec_row)); 155 ref += 16; 156 } 157 158 return horizontal_add_u16x8(vec_sum); 159 } 160 161 // ref, src = [0, 510] - max diff = 16-bits 162 // bwl = {2, 3, 4}, width = {16, 32, 64} 163 int vpx_vector_var_neon(int16_t const *ref, int16_t const *src, const int bwl) { 164 int width = 4 << bwl; 165 int32x4_t sse = vdupq_n_s32(0); 166 int16x8_t total = vdupq_n_s16(0); 167 168 assert(width >= 8); 169 assert((width % 8) == 0); 170 171 do { 172 const int16x8_t r = vld1q_s16(ref); 173 const int16x8_t s = vld1q_s16(src); 174 const int16x8_t diff = vsubq_s16(r, s); // [-510, 510], 10 bits. 175 const int16x4_t diff_lo = vget_low_s16(diff); 176 const int16x4_t diff_hi = vget_high_s16(diff); 177 sse = vmlal_s16(sse, diff_lo, diff_lo); // dynamic range 26 bits. 178 sse = vmlal_s16(sse, diff_hi, diff_hi); 179 total = vaddq_s16(total, diff); // dynamic range 16 bits. 180 181 ref += 8; 182 src += 8; 183 width -= 8; 184 } while (width != 0); 185 186 { 187 // Note: 'total''s pairwise addition could be implemented similarly to 188 // horizontal_add_u16x8(), but one less vpaddl with 'total' when paired 189 // with the summation of 'sse' performed better on a Cortex-A15. 190 const int32x4_t t0 = vpaddlq_s16(total); // cascading summation of 'total' 191 const int32x2_t t1 = vadd_s32(vget_low_s32(t0), vget_high_s32(t0)); 192 const int32x2_t t2 = vpadd_s32(t1, t1); 193 const int t = vget_lane_s32(t2, 0); 194 const int64x2_t s0 = vpaddlq_s32(sse); // cascading summation of 'sse'. 195 const int32x2_t s1 = vadd_s32(vreinterpret_s32_s64(vget_low_s64(s0)), 196 vreinterpret_s32_s64(vget_high_s64(s0))); 197 const int s = vget_lane_s32(s1, 0); 198 const int shift_factor = bwl + 2; 199 return s - ((t * t) >> shift_factor); 200 } 201 } 202 203 void vpx_minmax_8x8_neon(const uint8_t *a, int a_stride, const uint8_t *b, 204 int b_stride, int *min, int *max) { 205 // Load and concatenate. 206 const uint8x16_t a01 = vcombine_u8(vld1_u8(a), vld1_u8(a + a_stride)); 207 const uint8x16_t a23 = 208 vcombine_u8(vld1_u8(a + 2 * a_stride), vld1_u8(a + 3 * a_stride)); 209 const uint8x16_t a45 = 210 vcombine_u8(vld1_u8(a + 4 * a_stride), vld1_u8(a + 5 * a_stride)); 211 const uint8x16_t a67 = 212 vcombine_u8(vld1_u8(a + 6 * a_stride), vld1_u8(a + 7 * a_stride)); 213 214 const uint8x16_t b01 = vcombine_u8(vld1_u8(b), vld1_u8(b + b_stride)); 215 const uint8x16_t b23 = 216 vcombine_u8(vld1_u8(b + 2 * b_stride), vld1_u8(b + 3 * b_stride)); 217 const uint8x16_t b45 = 218 vcombine_u8(vld1_u8(b + 4 * b_stride), vld1_u8(b + 5 * b_stride)); 219 const uint8x16_t b67 = 220 vcombine_u8(vld1_u8(b + 6 * b_stride), vld1_u8(b + 7 * b_stride)); 221 222 // Absolute difference. 223 const uint8x16_t ab01_diff = vabdq_u8(a01, b01); 224 const uint8x16_t ab23_diff = vabdq_u8(a23, b23); 225 const uint8x16_t ab45_diff = vabdq_u8(a45, b45); 226 const uint8x16_t ab67_diff = vabdq_u8(a67, b67); 227 228 // Max values between the Q vectors. 229 const uint8x16_t ab0123_max = vmaxq_u8(ab01_diff, ab23_diff); 230 const uint8x16_t ab4567_max = vmaxq_u8(ab45_diff, ab67_diff); 231 const uint8x16_t ab0123_min = vminq_u8(ab01_diff, ab23_diff); 232 const uint8x16_t ab4567_min = vminq_u8(ab45_diff, ab67_diff); 233 234 const uint8x16_t ab07_max = vmaxq_u8(ab0123_max, ab4567_max); 235 const uint8x16_t ab07_min = vminq_u8(ab0123_min, ab4567_min); 236 237 // Split to D and start doing pairwise. 238 uint8x8_t ab_max = vmax_u8(vget_high_u8(ab07_max), vget_low_u8(ab07_max)); 239 uint8x8_t ab_min = vmin_u8(vget_high_u8(ab07_min), vget_low_u8(ab07_min)); 240 241 // Enough runs of vpmax/min propogate the max/min values to every position. 242 ab_max = vpmax_u8(ab_max, ab_max); 243 ab_min = vpmin_u8(ab_min, ab_min); 244 245 ab_max = vpmax_u8(ab_max, ab_max); 246 ab_min = vpmin_u8(ab_min, ab_min); 247 248 ab_max = vpmax_u8(ab_max, ab_max); 249 ab_min = vpmin_u8(ab_min, ab_min); 250 251 *min = *max = 0; // Clear high bits 252 // Store directly to avoid costly neon->gpr transfer. 253 vst1_lane_u8((uint8_t *)max, ab_max, 0); 254 vst1_lane_u8((uint8_t *)min, ab_min, 0); 255 } 256
