| // Copyright 2019 Google LLC |
| // |
| // This source code is licensed under the BSD-style license found in the |
| // LICENSE file in the root directory of this source tree. |
| |
| #include <assert.h> |
| |
| #include <xnnpack/dwconv.h> |
| #include <xnnpack/math.h> |
| |
| |
| void xnn_f32_dwconv_spchw_ukernel_3x3p1__scalar( |
| size_t m, |
| size_t n, |
| const float* input, |
| const float* weights, |
| float* output, |
| size_t input_tuple_stride, |
| size_t output_tuple_stride, |
| size_t input_width_stride, |
| size_t output_width_stride, |
| const union xnn_f32_spchw_params params[restrict XNN_MIN_ELEMENTS(1)]) |
| { |
| assert(n != 0); |
| |
| const size_t input_width_increment = input_width_stride - n * input_tuple_stride; |
| const size_t output_width_increment = output_width_stride - (n - 1) * output_tuple_stride; |
| |
| const float params_min = params->scalar.min; |
| const float params_max = params->scalar.max; |
| |
| // No vertical padding. |
| const float* i0 = input; |
| const float* i1 = (const float*) ((uintptr_t) i0 + input_width_stride); |
| const float* i2 = (const float*) ((uintptr_t) i1 + input_width_stride); |
| |
| float* output0 = output; |
| |
| const float vw0 = weights[0]; |
| const float vw1 = weights[1]; |
| const float vw2 = weights[2]; |
| const float vw3 = weights[3]; |
| const float vw4 = weights[4]; |
| const float vw5 = weights[5]; |
| const float vw6 = weights[6]; |
| const float vw7 = weights[7]; |
| const float vw8 = weights[8]; |
| const float vw9 = weights[9]; |
| |
| while (m > 0) { |
| float vi0x0 = 0.0f; |
| float vi1x0 = 0.0f; |
| float vi2x0 = 0.0f; |
| float vi0x1 = *i0; i0 = (const float*) ((uintptr_t) i0 + input_tuple_stride); |
| float vi1x1 = *i1; i1 = (const float*) ((uintptr_t) i1 + input_tuple_stride); |
| float vi2x1 = *i2; i2 = (const float*) ((uintptr_t) i2 + input_tuple_stride); |
| |
| size_t k = n; |
| for (; k > 1; k--) { |
| const float vi0x2 = *i0; i0 = (const float*) ((uintptr_t) i0 + input_tuple_stride); |
| const float vi1x2 = *i1; i1 = (const float*) ((uintptr_t) i1 + input_tuple_stride); |
| const float vi2x2 = *i2; i2 = (const float*) ((uintptr_t) i2 + input_tuple_stride); |
| |
| const float vrow0_accum = vw1 * vi0x0 + vw2 * vi0x1 + vw3 * vi0x2; |
| vi0x0 = vi0x1; |
| vi0x1 = vi0x2; |
| const float vrow1_accum = vw4 * vi1x0 + vw5 * vi1x1 + vw6 * vi1x2; |
| vi1x0 = vi1x1; |
| vi1x1 = vi1x2; |
| const float vrow2_accum = vw7 * vi2x0 + vw8 * vi2x1 + vw9 * vi2x2; |
| vi2x0 = vi2x1; |
| vi2x1 = vi2x2; |
| |
| float voutput = (vw0 + vrow0_accum) + (vrow1_accum + vrow2_accum); |
| |
| voutput = math_max_f32(voutput, params_min); |
| voutput = math_min_f32(voutput, params_max); |
| |
| *output0 = voutput; output0 = (float *) ((uintptr_t) output0 + output_tuple_stride); |
| } |
| // Always process the last pixel separately to account for right edge. |
| assert(k == 1); |
| { |
| const float vrow0_accum = vw1 * vi0x0 + vw2 * vi0x1; |
| const float vrow1_accum = vw4 * vi1x0 + vw5 * vi1x1; |
| const float vrow2_accum = vw7 * vi2x0 + vw8 * vi2x1; |
| |
| float voutput = (vw0 + vrow0_accum) + (vrow1_accum + vrow2_accum); |
| |
| voutput = math_max_f32(voutput, params_min); |
| voutput = math_min_f32(voutput, params_max); |
| |
| *output0 = voutput; |
| } |
| |
| i0 = (const float*) ((uintptr_t) i0 + input_width_increment); |
| i1 = (const float*) ((uintptr_t) i1 + input_width_increment); |
| i2 = (const float*) ((uintptr_t) i2 + input_width_increment); |
| output0 = (float*) ((uintptr_t) output0 + output_width_increment); |
| m--; |
| } |
| } |