Georgios Pinitas | 5ce897f | 2020-04-29 11:44:10 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2020 ARM Limited. |
| 3 | * |
| 4 | * SPDX-License-Identifier: MIT |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 7 | * of this software and associated documentation files (the "Software"), to |
| 8 | * deal in the Software without restriction, including without limitation the |
| 9 | * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or |
| 10 | * sell copies of the Software, and to permit persons to whom the Software is |
| 11 | * furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in all |
| 14 | * copies or substantial portions of the Software. |
| 15 | * |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 19 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 22 | * SOFTWARE. |
| 23 | */ |
| 24 | #ifdef __ARM_FEATURE_FP16_VECTOR_ARITHMETIC |
| 25 | #include "arm.hpp" |
| 26 | #include "input.hpp" |
| 27 | |
| 28 | namespace winograd |
| 29 | { |
| 30 | template <> |
| 31 | void InputTransform<6, 6, __fp16, __fp16, WinogradRoots::Integers>::transform_tile( |
| 32 | const int n_channels, |
| 33 | const __fp16* const input_base, |
| 34 | const int input_row_stride, |
| 35 | const int input_col_stride, |
| 36 | __fp16* outptr, |
| 37 | const int matrix_stride |
| 38 | ) |
| 39 | { |
| 40 | constexpr int inner_tile_rows = 6; |
| 41 | constexpr int inner_tile_cols = 6; |
| 42 | |
| 43 | // Get pointers into the input tile |
| 44 | const __fp16 *x_ptrs[inner_tile_rows][inner_tile_cols]; |
| 45 | for (int i = 0, xi = 0; i < inner_tile_rows; i++, xi++) |
| 46 | { |
| 47 | // Get a pointer into the row |
| 48 | const __fp16* const row_ptr = input_base + xi*input_row_stride; |
| 49 | |
| 50 | for (int j = 0, xj = 0; j < inner_tile_cols; j++, xj++) |
| 51 | { |
| 52 | x_ptrs[i][j] = row_ptr + xj*input_col_stride; |
| 53 | } |
| 54 | } |
| 55 | |
| 56 | // Matrices used/computed in this kernel. |
| 57 | __fp16 x[inner_tile_rows][inner_tile_cols]; |
| 58 | __fp16 XTx[inner_tile_rows][inner_tile_cols]; |
| 59 | __fp16 U[inner_tile_rows][inner_tile_cols]; |
| 60 | for (int i = 0; i < inner_tile_rows; i++) |
| 61 | { |
| 62 | for (int j = 0; j < inner_tile_cols; j++) |
| 63 | { |
| 64 | x[i][j] = XTx[i][j] = 0.0f; |
| 65 | } |
| 66 | } |
| 67 | |
| 68 | // Perform the Winograd input transformation for each channel in the input |
| 69 | // tensor. |
| 70 | int channels_remaining = n_channels; |
| 71 | for (; channels_remaining >= 8; channels_remaining -= 8) |
| 72 | { |
| 73 | // Matrices used/computed in this kernel |
| 74 | float16x8_t x[inner_tile_rows][inner_tile_cols]; |
| 75 | float16x8_t XTx[inner_tile_rows][inner_tile_cols]; |
| 76 | float16x8_t U[inner_tile_rows][inner_tile_cols]; |
| 77 | for (int i = 0; i < inner_tile_rows; i++) |
| 78 | { |
| 79 | for (int j = 0; j < inner_tile_cols; j++) |
| 80 | { |
| 81 | x[i][j] = vdupq_n_f16(0.0f); |
| 82 | XTx[i][j] = vdupq_n_f16(0.0f); |
| 83 | } |
| 84 | } |
| 85 | |
| 86 | // Read a 6x6 tile in the Winograd domain |
| 87 | for (int i = 0; i < inner_tile_rows; i++) |
| 88 | { |
| 89 | for (int j = 0; j < inner_tile_cols; j++) |
| 90 | { |
| 91 | x[i][j] = vld1q_f16(x_ptrs[i][j]); |
| 92 | x_ptrs[i][j] += 8; |
| 93 | } |
| 94 | } |
| 95 | |
| 96 | // Compute XT . x |
| 97 | for (int j = 0; j < inner_tile_cols; j++) |
| 98 | { |
| 99 | // XTx[0][j] = 4*x[0][j] + -5*x[2][j] + 1*x[4][j]; |
| 100 | XTx[0][j] = vsubq_f16(vaddq_f16(x[4][j], vmulq_f16(x[0][j], vdupq_n_f16(4.0f))), vmulq_f16(x[2][j], vdupq_n_f16(5.0f))); |
| 101 | |
| 102 | // XTx[1][j] = -4*x[1][j] + -4*x[2][j] + 1*x[3][j] + 1*x[4][j]; |
| 103 | XTx[1][j] = vsubq_f16(vaddq_f16(x[3][j], x[4][j]), vmulq_f16(vaddq_f16(x[1][j], x[2][j]), vdupq_n_f16(4.0f))); |
| 104 | |
| 105 | // XTx[2][j] = 4*x[1][j] + -4*x[2][j] + -1*x[3][j] + 1*x[4][j]; |
| 106 | XTx[2][j] = vaddq_f16(vsubq_f16(x[4][j], x[3][j]), vmulq_f16(vsubq_f16(x[1][j], x[2][j]), vdupq_n_f16(4.0f))); |
| 107 | |
| 108 | // XTx[3][j] = -2*x[1][j] + -1*x[2][j] + 2*x[3][j] + 1*x[4][j]; |
| 109 | XTx[3][j] = vaddq_f16(vsubq_f16(x[4][j], x[2][j]), vmulq_f16(vsubq_f16(x[3][j], x[1][j]), vdupq_n_f16(2.0f))); |
| 110 | |
| 111 | // XTx[4][j] = 2*x[1][j] + -1*x[2][j] + -2*x[3][j] + 1*x[4][j]; |
| 112 | XTx[4][j] = vaddq_f16(vsubq_f16(x[4][j], x[2][j]), vmulq_f16(vsubq_f16(x[1][j], x[3][j]), vdupq_n_f16(2.0f))); |
| 113 | |
| 114 | // XTx[5][j] = 4*x[1][j] + -5*x[3][j] + 1*x[5][j]; |
| 115 | XTx[5][j] = vsubq_f16(vaddq_f16(x[5][j], vmulq_f16(x[1][j], vdupq_n_f16(4.0f))), vmulq_f16(x[3][j], vdupq_n_f16(5.0f))); |
| 116 | } |
| 117 | |
| 118 | // Compute U = XT . x . X |
| 119 | for (int i = 0; i < inner_tile_rows; i++) |
| 120 | { |
| 121 | // U[i][0] = 4*XTx[i][0] + -5*XTx[i][2] + 1*XTx[i][4]; |
| 122 | U[i][0] = vsubq_f16(vaddq_f16(XTx[i][4], vmulq_f16(XTx[i][0], vdupq_n_f16(4.0f))), vmulq_f16(XTx[i][2], vdupq_n_f16(5.0f))); |
| 123 | |
| 124 | // U[i][1] = -4*XTx[i][1] + -4*XTx[i][2] + 1*XTx[i][3] + 1*XTx[i][4]; |
| 125 | U[i][1] = vsubq_f16(vaddq_f16(XTx[i][3], XTx[i][4]), vmulq_f16(vaddq_f16(XTx[i][1], XTx[i][2]), vdupq_n_f16(4.0f))); |
| 126 | |
| 127 | // U[i][2] = 4*XTx[i][1] + -4*XTx[i][2] + -1*XTx[i][3] + 1*XTx[i][4]; |
| 128 | U[i][2] = vaddq_f16(vsubq_f16(XTx[i][4], XTx[i][3]), vmulq_f16(vsubq_f16(XTx[i][1], XTx[i][2]), vdupq_n_f16(4.0f))); |
| 129 | |
| 130 | // U[i][3] = -2*XTx[i][1] + -1*XTx[i][2] + 2*XTx[i][3] + 1*XTx[i][4]; |
| 131 | U[i][3] = vaddq_f16(vsubq_f16(XTx[i][4], XTx[i][2]), vmulq_f16(vsubq_f16(XTx[i][3], XTx[i][1]), vdupq_n_f16(2.0f))); |
| 132 | |
| 133 | // U[i][4] = 2*XTx[i][1] + -1*XTx[i][2] + -2*XTx[i][3] + 1*XTx[i][4]; |
| 134 | U[i][4] = vaddq_f16(vsubq_f16(XTx[i][4], XTx[i][2]), vmulq_f16(vsubq_f16(XTx[i][1], XTx[i][3]), vdupq_n_f16(2.0f))); |
| 135 | |
| 136 | // U[i][5] = 4*XTx[i][1] + -5*XTx[i][3] + 1*XTx[i][5]; |
| 137 | U[i][5] = vsubq_f16(vaddq_f16(XTx[i][5], vmulq_f16(XTx[i][1], vdupq_n_f16(4.0f))), vmulq_f16(XTx[i][3], vdupq_n_f16(5.0f))); |
| 138 | } |
| 139 | |
| 140 | // Store the transformed matrix |
| 141 | for (int i = 0, m = 0; i < inner_tile_rows; i++) |
| 142 | { |
| 143 | for (int j = 0; j < inner_tile_cols; j++, m++) |
| 144 | { |
| 145 | vst1q_f16(outptr + m*matrix_stride, U[i][j]); |
| 146 | } |
| 147 | } |
| 148 | outptr += 8; |
| 149 | } |
| 150 | for (; channels_remaining >= 4; channels_remaining -= 4) |
| 151 | { |
| 152 | // Matrices used/computed in this kernel |
| 153 | float16x4_t x[inner_tile_rows][inner_tile_cols]; |
| 154 | float16x4_t XTx[inner_tile_rows][inner_tile_cols]; |
| 155 | float16x4_t U[inner_tile_rows][inner_tile_cols]; |
| 156 | for (int i = 0; i < inner_tile_rows; i++) |
| 157 | { |
| 158 | for (int j = 0; j < inner_tile_cols; j++) |
| 159 | { |
| 160 | x[i][j] = vdup_n_f16(0.0f); |
| 161 | XTx[i][j] = vdup_n_f16(0.0f); |
| 162 | } |
| 163 | } |
| 164 | |
| 165 | // Read a 6x6 tile in the Winograd domain |
| 166 | for (int i = 0; i < inner_tile_rows; i++) |
| 167 | { |
| 168 | for (int j = 0; j < inner_tile_cols; j++) |
| 169 | { |
| 170 | x[i][j] = vld1_f16(x_ptrs[i][j]); |
| 171 | x_ptrs[i][j] += 4; |
| 172 | } |
| 173 | } |
| 174 | |
| 175 | // Compute XT . x |
| 176 | for (int j = 0; j < inner_tile_cols; j++) |
| 177 | { |
| 178 | // XTx[0][j] = 4*x[0][j] + -5*x[2][j] + 1*x[4][j]; |
| 179 | XTx[0][j] = vsub_f16(vadd_f16(x[4][j], vmul_f16(x[0][j], vdup_n_f16(4.0f))), vmul_f16(x[2][j], vdup_n_f16(5.0f))); |
| 180 | |
| 181 | // XTx[1][j] = -4*x[1][j] + -4*x[2][j] + 1*x[3][j] + 1*x[4][j]; |
| 182 | XTx[1][j] = vsub_f16(vadd_f16(x[3][j], x[4][j]), vmul_f16(vadd_f16(x[1][j], x[2][j]), vdup_n_f16(4.0f))); |
| 183 | |
| 184 | // XTx[2][j] = 4*x[1][j] + -4*x[2][j] + -1*x[3][j] + 1*x[4][j]; |
| 185 | XTx[2][j] = vadd_f16(vsub_f16(x[4][j], x[3][j]), vmul_f16(vsub_f16(x[1][j], x[2][j]), vdup_n_f16(4.0f))); |
| 186 | |
| 187 | // XTx[3][j] = -2*x[1][j] + -1*x[2][j] + 2*x[3][j] + 1*x[4][j]; |
| 188 | XTx[3][j] = vadd_f16(vsub_f16(x[4][j], x[2][j]), vmul_f16(vsub_f16(x[3][j], x[1][j]), vdup_n_f16(2.0f))); |
| 189 | |
| 190 | // XTx[4][j] = 2*x[1][j] + -1*x[2][j] + -2*x[3][j] + 1*x[4][j]; |
| 191 | XTx[4][j] = vadd_f16(vsub_f16(x[4][j], x[2][j]), vmul_f16(vsub_f16(x[1][j], x[3][j]), vdup_n_f16(2.0f))); |
| 192 | |
| 193 | // XTx[5][j] = 4*x[1][j] + -5*x[3][j] + 1*x[5][j]; |
| 194 | XTx[5][j] = vsub_f16(vadd_f16(x[5][j], vmul_f16(x[1][j], vdup_n_f16(4.0f))), vmul_f16(x[3][j], vdup_n_f16(5.0f))); |
| 195 | } |
| 196 | |
| 197 | // Compute U = XT . x . X |
| 198 | for (int i = 0; i < inner_tile_rows; i++) |
| 199 | { |
| 200 | // U[i][0] = 4*XTx[i][0] + -5*XTx[i][2] + 1*XTx[i][4]; |
| 201 | U[i][0] = vsub_f16(vadd_f16(XTx[i][4], vmul_f16(XTx[i][0], vdup_n_f16(4.0f))), vmul_f16(XTx[i][2], vdup_n_f16(5.0f))); |
| 202 | |
| 203 | // U[i][1] = -4*XTx[i][1] + -4*XTx[i][2] + 1*XTx[i][3] + 1*XTx[i][4]; |
| 204 | U[i][1] = vsub_f16(vadd_f16(XTx[i][3], XTx[i][4]), vmul_f16(vadd_f16(XTx[i][1], XTx[i][2]), vdup_n_f16(4.0f))); |
| 205 | |
| 206 | // U[i][2] = 4*XTx[i][1] + -4*XTx[i][2] + -1*XTx[i][3] + 1*XTx[i][4]; |
| 207 | U[i][2] = vadd_f16(vsub_f16(XTx[i][4], XTx[i][3]), vmul_f16(vsub_f16(XTx[i][1], XTx[i][2]), vdup_n_f16(4.0f))); |
| 208 | |
| 209 | // U[i][3] = -2*XTx[i][1] + -1*XTx[i][2] + 2*XTx[i][3] + 1*XTx[i][4]; |
| 210 | U[i][3] = vadd_f16(vsub_f16(XTx[i][4], XTx[i][2]), vmul_f16(vsub_f16(XTx[i][3], XTx[i][1]), vdup_n_f16(2.0f))); |
| 211 | |
| 212 | // U[i][4] = 2*XTx[i][1] + -1*XTx[i][2] + -2*XTx[i][3] + 1*XTx[i][4]; |
| 213 | U[i][4] = vadd_f16(vsub_f16(XTx[i][4], XTx[i][2]), vmul_f16(vsub_f16(XTx[i][1], XTx[i][3]), vdup_n_f16(2.0f))); |
| 214 | |
| 215 | // U[i][5] = 4*XTx[i][1] + -5*XTx[i][3] + 1*XTx[i][5]; |
| 216 | U[i][5] = vsub_f16(vadd_f16(XTx[i][5], vmul_f16(XTx[i][1], vdup_n_f16(4.0f))), vmul_f16(XTx[i][3], vdup_n_f16(5.0f))); |
| 217 | } |
| 218 | |
| 219 | // Store the transformed matrix |
| 220 | for (int i = 0, m = 0; i < inner_tile_rows; i++) |
| 221 | { |
| 222 | for (int j = 0; j < inner_tile_cols; j++, m++) |
| 223 | { |
| 224 | vst1_f16(outptr + m*matrix_stride, U[i][j]); |
| 225 | } |
| 226 | } |
| 227 | outptr += 4; |
| 228 | } |
| 229 | for (; channels_remaining; channels_remaining--) |
| 230 | { |
| 231 | // Load x |
| 232 | for (int i = 0; i < inner_tile_rows; i++) |
| 233 | { |
| 234 | for (int j = 0; j < inner_tile_cols; j++) |
| 235 | { |
| 236 | x[i][j] = *(x_ptrs[i][j]++); |
| 237 | } |
| 238 | } |
| 239 | |
| 240 | // Compute XT . x |
| 241 | for (int j = 0; j < inner_tile_cols; j++) |
| 242 | { |
| 243 | XTx[0][j] = 4*x[0][j] + -5*x[2][j] + 1*x[4][j]; |
| 244 | XTx[1][j] = -4*x[1][j] + -4*x[2][j] + 1*x[3][j] + 1*x[4][j]; |
| 245 | XTx[2][j] = 4*x[1][j] + -4*x[2][j] + -1*x[3][j] + 1*x[4][j]; |
| 246 | XTx[3][j] = -2*x[1][j] + -1*x[2][j] + 2*x[3][j] + 1*x[4][j]; |
| 247 | XTx[4][j] = 2*x[1][j] + -1*x[2][j] + -2*x[3][j] + 1*x[4][j]; |
| 248 | XTx[5][j] = 4*x[1][j] + -5*x[3][j] + 1*x[5][j]; |
| 249 | } |
| 250 | |
| 251 | // Compute U = XT . x . X |
| 252 | for (int i = 0; i < inner_tile_rows; i++) |
| 253 | { |
| 254 | U[i][0] = 4*XTx[i][0] + -5*XTx[i][2] + 1*XTx[i][4]; |
| 255 | U[i][1] = -4*XTx[i][1] + -4*XTx[i][2] + 1*XTx[i][3] + 1*XTx[i][4]; |
| 256 | U[i][2] = 4*XTx[i][1] + -4*XTx[i][2] + -1*XTx[i][3] + 1*XTx[i][4]; |
| 257 | U[i][3] = -2*XTx[i][1] + -1*XTx[i][2] + 2*XTx[i][3] + 1*XTx[i][4]; |
| 258 | U[i][4] = 2*XTx[i][1] + -1*XTx[i][2] + -2*XTx[i][3] + 1*XTx[i][4]; |
| 259 | U[i][5] = 4*XTx[i][1] + -5*XTx[i][3] + 1*XTx[i][5]; |
| 260 | } |
| 261 | |
| 262 | // Store the transformed matrix |
| 263 | for (int i = 0, m = 0; i < inner_tile_rows; i++) |
| 264 | { |
| 265 | for (int j = 0; j < inner_tile_cols; j++, m++) |
| 266 | { |
| 267 | *(outptr + m*matrix_stride) = U[i][j]; |
| 268 | } |
| 269 | } |
| 270 | outptr++; |
| 271 | } |
| 272 | } |
| 273 | |
| 274 | template class InputTransform<6, 6, __fp16, __fp16, WinogradRoots::Integers>; |
| 275 | |
| 276 | } // namespace winograd |
| 277 | #endif // __ARM_FEATURE_FP16_VECTOR_ARITHMETIC |