Erich Elsen | ac4de80 | 2019-10-16 04:35:30 -0700 | [diff] [blame] | 1 | // Copyright 2019 Google LLC |
| 2 | // |
| 3 | // This source code is licensed under the BSD-style license found in the |
| 4 | // LICENSE file in the root directory of this source tree. |
| 5 | |
| 6 | #include <assert.h> |
| 7 | |
| 8 | #include <xnnpack/dwconv.h> |
| 9 | #include <xnnpack/math.h> |
| 10 | |
| 11 | |
| 12 | void xnn_f32_dwconv_spchw_ukernel_3x3s2p1__scalar( |
| 13 | size_t m, |
| 14 | size_t n, |
| 15 | const float* input, |
| 16 | const float* weights, |
Erich Elsen | 4e5db3d | 2020-05-07 08:57:47 -0700 | [diff] [blame^] | 17 | const float* zero, |
Erich Elsen | ac4de80 | 2019-10-16 04:35:30 -0700 | [diff] [blame] | 18 | float* output, |
Erich Elsen | 4e5db3d | 2020-05-07 08:57:47 -0700 | [diff] [blame^] | 19 | uint32_t padding_top, |
Erich Elsen | ac4de80 | 2019-10-16 04:35:30 -0700 | [diff] [blame] | 20 | size_t input_tuple_stride, |
| 21 | size_t output_tuple_stride, |
| 22 | size_t input_width_stride, |
| 23 | size_t output_width_stride, |
Marat Dukhan | f196d01 | 2020-04-15 11:50:03 -0700 | [diff] [blame] | 24 | const union xnn_f32_spchw_params params[restrict XNN_MIN_ELEMENTS(1)]) |
Erich Elsen | ac4de80 | 2019-10-16 04:35:30 -0700 | [diff] [blame] | 25 | { |
| 26 | assert(n != 0); |
Erich Elsen | 4e5db3d | 2020-05-07 08:57:47 -0700 | [diff] [blame^] | 27 | assert(padding_top <= 1); |
Erich Elsen | ac4de80 | 2019-10-16 04:35:30 -0700 | [diff] [blame] | 28 | |
Erich Elsen | 4e5db3d | 2020-05-07 08:57:47 -0700 | [diff] [blame^] | 29 | const size_t input_width_decrement_single = (n/2) * 2 * input_tuple_stride;; |
| 30 | const size_t input_width_increment = 2 * input_width_stride - input_width_decrement_single; |
Erich Elsen | ac4de80 | 2019-10-16 04:35:30 -0700 | [diff] [blame] | 31 | const size_t output_width_increment = output_width_stride - (n/2) * output_tuple_stride; |
| 32 | |
| 33 | const float params_min = params->scalar.min; |
| 34 | const float params_max = params->scalar.max; |
| 35 | |
Erich Elsen | 4e5db3d | 2020-05-07 08:57:47 -0700 | [diff] [blame^] | 36 | const float* i0; |
| 37 | const float* i1; |
| 38 | const float* i2; |
| 39 | |
| 40 | if (padding_top == 0) { |
| 41 | i0 = input; |
| 42 | i1 = (const float*) ((uintptr_t) i0 + input_width_stride); |
| 43 | i2 = (const float*) ((uintptr_t) i1 + input_width_stride); |
| 44 | if (m == 1) { |
| 45 | i2 = zero; |
| 46 | } |
| 47 | } else { |
| 48 | i0 = zero; |
| 49 | i1 = input; |
| 50 | i2 = (const float*) ((uintptr_t) i1 + input_width_stride); |
| 51 | if (m == 1) { |
| 52 | i2 = zero; |
| 53 | } |
| 54 | } |
Erich Elsen | ac4de80 | 2019-10-16 04:35:30 -0700 | [diff] [blame] | 55 | |
| 56 | float* output0 = output; |
| 57 | |
| 58 | const float vw0 = weights[0]; |
| 59 | const float vw1 = weights[1]; |
| 60 | const float vw2 = weights[2]; |
| 61 | const float vw3 = weights[3]; |
| 62 | const float vw4 = weights[4]; |
| 63 | const float vw5 = weights[5]; |
| 64 | const float vw6 = weights[6]; |
| 65 | const float vw7 = weights[7]; |
| 66 | const float vw8 = weights[8]; |
| 67 | const float vw9 = weights[9]; |
| 68 | |
| 69 | while (m > 0) { |
| 70 | float vi0x0 = 0.0f; |
| 71 | float vi1x0 = 0.0f; |
| 72 | float vi2x0 = 0.0f; |
| 73 | |
| 74 | size_t k = n; |
| 75 | for (; k >= 2; k -= 2) { |
| 76 | const float vi0x1 = *i0; i0 = (const float*) ((uintptr_t) i0 + input_tuple_stride); |
| 77 | const float vi1x1 = *i1; i1 = (const float*) ((uintptr_t) i1 + input_tuple_stride); |
| 78 | const float vi2x1 = *i2; i2 = (const float*) ((uintptr_t) i2 + input_tuple_stride); |
| 79 | const float vi0x2 = *i0; i0 = (const float*) ((uintptr_t) i0 + input_tuple_stride); |
| 80 | const float vi1x2 = *i1; i1 = (const float*) ((uintptr_t) i1 + input_tuple_stride); |
| 81 | const float vi2x2 = *i2; i2 = (const float*) ((uintptr_t) i2 + input_tuple_stride); |
| 82 | |
| 83 | const float vrow0_accum = vw1 * vi0x0 + vw2 * vi0x1 + vw3 * vi0x2; |
| 84 | vi0x0 = vi0x2; |
| 85 | const float vrow1_accum = vw4 * vi1x0 + vw5 * vi1x1 + vw6 * vi1x2; |
| 86 | vi1x0 = vi1x2; |
| 87 | const float vrow2_accum = vw7 * vi2x0 + vw8 * vi2x1 + vw9 * vi2x2; |
| 88 | vi2x0 = vi2x2; |
| 89 | |
| 90 | float voutput = (vw0 + vrow0_accum) + (vrow1_accum + vrow2_accum); |
| 91 | |
| 92 | voutput = math_max_f32(voutput, params_min); |
| 93 | voutput = math_min_f32(voutput, params_max); |
| 94 | |
| 95 | *output0 = voutput; output0 = (float *) ((uintptr_t) output0 + output_tuple_stride); |
| 96 | } |
| 97 | // Possibly process the last pixel separately to account for right edge. |
| 98 | if (k == 1) |
| 99 | { |
| 100 | const float vi0x1 = i0[0]; |
| 101 | const float vi1x1 = i1[0]; |
| 102 | const float vi2x1 = i2[0]; |
| 103 | const float vrow0_accum = vw1 * vi0x0 + vw2 * vi0x1; |
| 104 | const float vrow1_accum = vw4 * vi1x0 + vw5 * vi1x1; |
| 105 | const float vrow2_accum = vw7 * vi2x0 + vw8 * vi2x1; |
| 106 | |
| 107 | float voutput = (vw0 + vrow0_accum) + (vrow1_accum + vrow2_accum); |
| 108 | |
| 109 | voutput = math_max_f32(voutput, params_min); |
| 110 | voutput = math_min_f32(voutput, params_max); |
| 111 | |
| 112 | *output0 = voutput; |
| 113 | } |
| 114 | |
Erich Elsen | 4e5db3d | 2020-05-07 08:57:47 -0700 | [diff] [blame^] | 115 | i0 = (const float*) ((uintptr_t) i2 - input_width_decrement_single); |
Erich Elsen | ac4de80 | 2019-10-16 04:35:30 -0700 | [diff] [blame] | 116 | i1 = (const float*) ((uintptr_t) i1 + input_width_increment); |
| 117 | i2 = (const float*) ((uintptr_t) i2 + input_width_increment); |
| 118 | output0 = (float*) ((uintptr_t) output0 + output_width_increment); |
Erich Elsen | 4e5db3d | 2020-05-07 08:57:47 -0700 | [diff] [blame^] | 119 | m -= 1; |
| 120 | if (m == 1) { |
| 121 | i2 = zero; |
| 122 | } |
Erich Elsen | ac4de80 | 2019-10-16 04:35:30 -0700 | [diff] [blame] | 123 | } |
| 124 | } |