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 "./vp9_rtcd.h" 15 #include "./vpx_config.h" 16 17 #include "vpx/vpx_integer.h" 18 19 static INLINE unsigned int horizontal_add_u16x8(const uint16x8_t v_16x8) { 20 const uint32x4_t a = vpaddlq_u16(v_16x8); 21 const uint64x2_t b = vpaddlq_u32(a); 22 const uint32x2_t c = vadd_u32(vreinterpret_u32_u64(vget_low_u64(b)), 23 vreinterpret_u32_u64(vget_high_u64(b))); 24 return vget_lane_u32(c, 0); 25 } 26 27 unsigned int vp9_avg_8x8_neon(const uint8_t *s, int p) { 28 uint8x8_t v_s0 = vld1_u8(s); 29 const uint8x8_t v_s1 = vld1_u8(s + p); 30 uint16x8_t v_sum = vaddl_u8(v_s0, v_s1); 31 32 v_s0 = vld1_u8(s + 2 * p); 33 v_sum = vaddw_u8(v_sum, v_s0); 34 35 v_s0 = vld1_u8(s + 3 * p); 36 v_sum = vaddw_u8(v_sum, v_s0); 37 38 v_s0 = vld1_u8(s + 4 * p); 39 v_sum = vaddw_u8(v_sum, v_s0); 40 41 v_s0 = vld1_u8(s + 5 * p); 42 v_sum = vaddw_u8(v_sum, v_s0); 43 44 v_s0 = vld1_u8(s + 6 * p); 45 v_sum = vaddw_u8(v_sum, v_s0); 46 47 v_s0 = vld1_u8(s + 7 * p); 48 v_sum = vaddw_u8(v_sum, v_s0); 49 50 return (horizontal_add_u16x8(v_sum) + 32) >> 6; 51 } 52 53 void vp9_int_pro_row_neon(int16_t hbuf[16], uint8_t const *ref, 54 const int ref_stride, const int height) { 55 int i; 56 uint16x8_t vec_sum_lo = vdupq_n_u16(0); 57 uint16x8_t vec_sum_hi = vdupq_n_u16(0); 58 const int shift_factor = ((height >> 5) + 3) * -1; 59 const int16x8_t vec_shift = vdupq_n_s16(shift_factor); 60 61 for (i = 0; i < height; i += 8) { 62 const uint8x16_t vec_row1 = vld1q_u8(ref); 63 const uint8x16_t vec_row2 = vld1q_u8(ref + ref_stride); 64 const uint8x16_t vec_row3 = vld1q_u8(ref + ref_stride * 2); 65 const uint8x16_t vec_row4 = vld1q_u8(ref + ref_stride * 3); 66 const uint8x16_t vec_row5 = vld1q_u8(ref + ref_stride * 4); 67 const uint8x16_t vec_row6 = vld1q_u8(ref + ref_stride * 5); 68 const uint8x16_t vec_row7 = vld1q_u8(ref + ref_stride * 6); 69 const uint8x16_t vec_row8 = vld1q_u8(ref + ref_stride * 7); 70 71 vec_sum_lo = vaddw_u8(vec_sum_lo, vget_low_u8(vec_row1)); 72 vec_sum_hi = vaddw_u8(vec_sum_hi, vget_high_u8(vec_row1)); 73 74 vec_sum_lo = vaddw_u8(vec_sum_lo, vget_low_u8(vec_row2)); 75 vec_sum_hi = vaddw_u8(vec_sum_hi, vget_high_u8(vec_row2)); 76 77 vec_sum_lo = vaddw_u8(vec_sum_lo, vget_low_u8(vec_row3)); 78 vec_sum_hi = vaddw_u8(vec_sum_hi, vget_high_u8(vec_row3)); 79 80 vec_sum_lo = vaddw_u8(vec_sum_lo, vget_low_u8(vec_row4)); 81 vec_sum_hi = vaddw_u8(vec_sum_hi, vget_high_u8(vec_row4)); 82 83 vec_sum_lo = vaddw_u8(vec_sum_lo, vget_low_u8(vec_row5)); 84 vec_sum_hi = vaddw_u8(vec_sum_hi, vget_high_u8(vec_row5)); 85 86 vec_sum_lo = vaddw_u8(vec_sum_lo, vget_low_u8(vec_row6)); 87 vec_sum_hi = vaddw_u8(vec_sum_hi, vget_high_u8(vec_row6)); 88 89 vec_sum_lo = vaddw_u8(vec_sum_lo, vget_low_u8(vec_row7)); 90 vec_sum_hi = vaddw_u8(vec_sum_hi, vget_high_u8(vec_row7)); 91 92 vec_sum_lo = vaddw_u8(vec_sum_lo, vget_low_u8(vec_row8)); 93 vec_sum_hi = vaddw_u8(vec_sum_hi, vget_high_u8(vec_row8)); 94 95 ref += ref_stride * 8; 96 } 97 98 vec_sum_lo = vshlq_u16(vec_sum_lo, vec_shift); 99 vec_sum_hi = vshlq_u16(vec_sum_hi, vec_shift); 100 101 vst1q_s16(hbuf, vreinterpretq_s16_u16(vec_sum_lo)); 102 hbuf += 8; 103 vst1q_s16(hbuf, vreinterpretq_s16_u16(vec_sum_hi)); 104 } 105 106 int16_t vp9_int_pro_col_neon(uint8_t const *ref, const int width) { 107 int i; 108 uint16x8_t vec_sum = vdupq_n_u16(0); 109 110 for (i = 0; i < width; i += 16) { 111 const uint8x16_t vec_row = vld1q_u8(ref); 112 vec_sum = vaddw_u8(vec_sum, vget_low_u8(vec_row)); 113 vec_sum = vaddw_u8(vec_sum, vget_high_u8(vec_row)); 114 ref += 16; 115 } 116 117 return horizontal_add_u16x8(vec_sum); 118 } 119 120 // ref, src = [0, 510] - max diff = 16-bits 121 // bwl = {2, 3, 4}, width = {16, 32, 64} 122 int vp9_vector_var_neon(int16_t const *ref, int16_t const *src, const int bwl) { 123 int width = 4 << bwl; 124 int32x4_t sse = vdupq_n_s32(0); 125 int16x8_t total = vdupq_n_s16(0); 126 127 assert(width >= 8); 128 assert((width % 8) == 0); 129 130 do { 131 const int16x8_t r = vld1q_s16(ref); 132 const int16x8_t s = vld1q_s16(src); 133 const int16x8_t diff = vsubq_s16(r, s); // [-510, 510], 10 bits. 134 const int16x4_t diff_lo = vget_low_s16(diff); 135 const int16x4_t diff_hi = vget_high_s16(diff); 136 sse = vmlal_s16(sse, diff_lo, diff_lo); // dynamic range 26 bits. 137 sse = vmlal_s16(sse, diff_hi, diff_hi); 138 total = vaddq_s16(total, diff); // dynamic range 16 bits. 139 140 ref += 8; 141 src += 8; 142 width -= 8; 143 } while (width != 0); 144 145 { 146 // Note: 'total''s pairwise addition could be implemented similarly to 147 // horizontal_add_u16x8(), but one less vpaddl with 'total' when paired 148 // with the summation of 'sse' performed better on a Cortex-A15. 149 const int32x4_t t0 = vpaddlq_s16(total); // cascading summation of 'total' 150 const int32x2_t t1 = vadd_s32(vget_low_s32(t0), vget_high_s32(t0)); 151 const int32x2_t t2 = vpadd_s32(t1, t1); 152 const int t = vget_lane_s32(t2, 0); 153 const int64x2_t s0 = vpaddlq_s32(sse); // cascading summation of 'sse'. 154 const int32x2_t s1 = vadd_s32(vreinterpret_s32_s64(vget_low_s64(s0)), 155 vreinterpret_s32_s64(vget_high_s64(s0))); 156 const int s = vget_lane_s32(s1, 0); 157 const int shift_factor = bwl + 2; 158 return s - ((t * t) >> shift_factor); 159 } 160 } 161
