// Auto-generated file. Do not edit! // Template: src/f32-dwconv/multipass-avx.c.in // Generator: tools/xngen // // Copyright 2022 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 #include #include #include #include "xnnpack/dwconv.h" #include "xnnpack/math.h" void xnn_f32_dwconv_minmax_ukernel_5f5m5l16c8s4r__fma3( size_t channels, size_t output_width, const float** input, const float* weights, float* output, intptr_t input_stride, size_t output_increment, size_t input_offset, const float* zero, size_t kernel_size, float* buffer, const union xnn_f32_minmax_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_OOB_READS { assert(channels != 0); assert(output_width != 0); assert(kernel_size > 5); static const int32_t mask_table[14] = {-1, -1, -1, -1, -1, -1, -1, 0, 0, 0, 0, 0, 0, 0}; const __m256 vmin = _mm256_set1_ps(params->scalar.min); const __m256 vmax = _mm256_set1_ps(params->scalar.max); XNN_FORCE_REALIZATION(vmin); XNN_FORCE_REALIZATION(vmax); do { const float* w = weights; // First pass to process 5 inputs. { float* b = buffer; const float* i0 = input[0]; assert(i0 != NULL); if XNN_UNPREDICTABLE(i0 != zero) { i0 = (const float*) ((uintptr_t) i0 + input_offset); } const float* i1 = input[1]; assert(i1 != NULL); if XNN_UNPREDICTABLE(i1 != zero) { i1 = (const float*) ((uintptr_t) i1 + input_offset); } const float* i2 = input[2]; assert(i2 != NULL); if XNN_UNPREDICTABLE(i2 != zero) { i2 = (const float*) ((uintptr_t) i2 + input_offset); } const float* i3 = input[3]; assert(i3 != NULL); if XNN_UNPREDICTABLE(i3 != zero) { i3 = (const float*) ((uintptr_t) i3 + input_offset); } const float* i4 = input[4]; assert(i4 != NULL); if XNN_UNPREDICTABLE(i4 != zero) { i4 = (const float*) ((uintptr_t) i4 + input_offset); } input += 5; // Process c channels and write to buffer. size_t c = round_up_po2(channels, 4); for (; c >= 16; c -= 16) { __m256 vacc01234567p0 = _mm256_load_ps(w); __m256 vacc89ABCDEFp0 = _mm256_load_ps(w + 8); const __m256 vi0x01234567 = _mm256_loadu_ps(i0); const __m256 vi0x89ABCDEF = _mm256_loadu_ps(i0 + 8); i0 += 16; const __m256 vk0x01234567 = _mm256_load_ps(w + 16); const __m256 vk0x89ABCDEF = _mm256_load_ps(w + 24); vacc01234567p0 = _mm256_fmadd_ps(vi0x01234567, vk0x01234567, vacc01234567p0); vacc89ABCDEFp0 = _mm256_fmadd_ps(vi0x89ABCDEF, vk0x89ABCDEF, vacc89ABCDEFp0); const __m256 vi1x01234567 = _mm256_loadu_ps(i1); const __m256 vi1x89ABCDEF = _mm256_loadu_ps(i1 + 8); i1 += 16; const __m256 vk1x01234567 = _mm256_load_ps(w + 32); const __m256 vk1x89ABCDEF = _mm256_load_ps(w + 40); vacc01234567p0 = _mm256_fmadd_ps(vi1x01234567, vk1x01234567, vacc01234567p0); vacc89ABCDEFp0 = _mm256_fmadd_ps(vi1x89ABCDEF, vk1x89ABCDEF, vacc89ABCDEFp0); const __m256 vi2x01234567 = _mm256_loadu_ps(i2); const __m256 vi2x89ABCDEF = _mm256_loadu_ps(i2 + 8); i2 += 16; const __m256 vk2x01234567 = _mm256_load_ps(w + 48); const __m256 vk2x89ABCDEF = _mm256_load_ps(w + 56); vacc01234567p0 = _mm256_fmadd_ps(vi2x01234567, vk2x01234567, vacc01234567p0); vacc89ABCDEFp0 = _mm256_fmadd_ps(vi2x89ABCDEF, vk2x89ABCDEF, vacc89ABCDEFp0); const __m256 vi3x01234567 = _mm256_loadu_ps(i3); const __m256 vi3x89ABCDEF = _mm256_loadu_ps(i3 + 8); i3 += 16; const __m256 vk3x01234567 = _mm256_load_ps(w + 64); const __m256 vk3x89ABCDEF = _mm256_load_ps(w + 72); vacc01234567p0 = _mm256_fmadd_ps(vi3x01234567, vk3x01234567, vacc01234567p0); vacc89ABCDEFp0 = _mm256_fmadd_ps(vi3x89ABCDEF, vk3x89ABCDEF, vacc89ABCDEFp0); const __m256 vi4x01234567 = _mm256_loadu_ps(i4); const __m256 vi4x89ABCDEF = _mm256_loadu_ps(i4 + 8); i4 += 16; const __m256 vk4x01234567 = _mm256_load_ps(w + 80); const __m256 vk4x89ABCDEF = _mm256_load_ps(w + 88); vacc01234567p0 = _mm256_fmadd_ps(vi4x01234567, vk4x01234567, vacc01234567p0); vacc89ABCDEFp0 = _mm256_fmadd_ps(vi4x89ABCDEF, vk4x89ABCDEF, vacc89ABCDEFp0); w += 96; _mm256_store_ps(b, vacc01234567p0); _mm256_store_ps(b + 8, vacc89ABCDEFp0); b += 16; } for (; c >= 8; c -= 8) { __m256 vacc01234567p0 = _mm256_load_ps(w); const __m256 vi0x01234567 = _mm256_loadu_ps(i0); i0 += 8; const __m256 vk0x01234567 = _mm256_load_ps(w + 8); vacc01234567p0 = _mm256_fmadd_ps(vi0x01234567, vk0x01234567, vacc01234567p0); const __m256 vi1x01234567 = _mm256_loadu_ps(i1); i1 += 8; const __m256 vk1x01234567 = _mm256_load_ps(w + 16); vacc01234567p0 = _mm256_fmadd_ps(vi1x01234567, vk1x01234567, vacc01234567p0); const __m256 vi2x01234567 = _mm256_loadu_ps(i2); i2 += 8; const __m256 vk2x01234567 = _mm256_load_ps(w + 24); vacc01234567p0 = _mm256_fmadd_ps(vi2x01234567, vk2x01234567, vacc01234567p0); const __m256 vi3x01234567 = _mm256_loadu_ps(i3); i3 += 8; const __m256 vk3x01234567 = _mm256_load_ps(w + 32); vacc01234567p0 = _mm256_fmadd_ps(vi3x01234567, vk3x01234567, vacc01234567p0); const __m256 vi4x01234567 = _mm256_loadu_ps(i4); i4 += 8; const __m256 vk4x01234567 = _mm256_load_ps(w + 40); vacc01234567p0 = _mm256_fmadd_ps(vi4x01234567, vk4x01234567, vacc01234567p0); w += 48; _mm256_store_ps(b, vacc01234567p0); b += 8; } if (c != 0) { assert(c >= 1); assert(c <= 7); const __m256i vmask = _mm256_loadu_si256((const __m256i*) &mask_table[7 - c]); __m256 vacc01234567p0 = _mm256_load_ps(w); const __m256 vi0x01234567 = _mm256_maskload_ps(i0, vmask); const __m256 vk0x01234567 = _mm256_load_ps(w + 8); vacc01234567p0 = _mm256_fmadd_ps(vi0x01234567, vk0x01234567, vacc01234567p0); const __m256 vi1x01234567 = _mm256_maskload_ps(i1, vmask); const __m256 vk1x01234567 = _mm256_load_ps(w + 16); vacc01234567p0 = _mm256_fmadd_ps(vi1x01234567, vk1x01234567, vacc01234567p0); const __m256 vi2x01234567 = _mm256_maskload_ps(i2, vmask); const __m256 vk2x01234567 = _mm256_load_ps(w + 24); vacc01234567p0 = _mm256_fmadd_ps(vi2x01234567, vk2x01234567, vacc01234567p0); const __m256 vi3x01234567 = _mm256_maskload_ps(i3, vmask); const __m256 vk3x01234567 = _mm256_load_ps(w + 32); vacc01234567p0 = _mm256_fmadd_ps(vi3x01234567, vk3x01234567, vacc01234567p0); const __m256 vi4x01234567 = _mm256_maskload_ps(i4, vmask); const __m256 vk4x01234567 = _mm256_load_ps(w + 40); vacc01234567p0 = _mm256_fmadd_ps(vi4x01234567, vk4x01234567, vacc01234567p0); w += 48; _mm256_store_ps(b, vacc01234567p0); } } // Middle pass to process 5 inputs in each iteration. for (size_t ks = kernel_size - 5; ks > 5; ks -= 5) { float* b = buffer; const float* i0 = input[0]; assert(i0 != NULL); if XNN_UNPREDICTABLE(i0 != zero) { i0 = (const float*) ((uintptr_t) i0 + input_offset); } const float* i1 = input[1]; assert(i1 != NULL); if XNN_UNPREDICTABLE(i1 != zero) { i1 = (const float*) ((uintptr_t) i1 + input_offset); } const float* i2 = input[2]; assert(i2 != NULL); if XNN_UNPREDICTABLE(i2 != zero) { i2 = (const float*) ((uintptr_t) i2 + input_offset); } const float* i3 = input[3]; assert(i3 != NULL); if XNN_UNPREDICTABLE(i3 != zero) { i3 = (const float*) ((uintptr_t) i3 + input_offset); } const float* i4 = input[4]; assert(i4 != NULL); if XNN_UNPREDICTABLE(i4 != zero) { i4 = (const float*) ((uintptr_t) i4 + input_offset); } input += 5; size_t c = round_up_po2(channels, 4); for (; c >= 16; c -= 16) { __m256 vacc01234567p0 = _mm256_load_ps(b); __m256 vacc89ABCDEFp0 = _mm256_load_ps(b + 8); const __m256 vi0x01234567 = _mm256_loadu_ps(i0); const __m256 vi0x89ABCDEF = _mm256_loadu_ps(i0 + 8); i0 += 16; const __m256 vk0x01234567 = _mm256_load_ps(w); const __m256 vk0x89ABCDEF = _mm256_load_ps(w + 8); vacc01234567p0 = _mm256_fmadd_ps(vi0x01234567, vk0x01234567, vacc01234567p0); vacc89ABCDEFp0 = _mm256_fmadd_ps(vi0x89ABCDEF, vk0x89ABCDEF, vacc89ABCDEFp0); const __m256 vi1x01234567 = _mm256_loadu_ps(i1); const __m256 vi1x89ABCDEF = _mm256_loadu_ps(i1 + 8); i1 += 16; const __m256 vk1x01234567 = _mm256_load_ps(w + 16); const __m256 vk1x89ABCDEF = _mm256_load_ps(w + 24); vacc01234567p0 = _mm256_fmadd_ps(vi1x01234567, vk1x01234567, vacc01234567p0); vacc89ABCDEFp0 = _mm256_fmadd_ps(vi1x89ABCDEF, vk1x89ABCDEF, vacc89ABCDEFp0); const __m256 vi2x01234567 = _mm256_loadu_ps(i2); const __m256 vi2x89ABCDEF = _mm256_loadu_ps(i2 + 8); i2 += 16; const __m256 vk2x01234567 = _mm256_load_ps(w + 32); const __m256 vk2x89ABCDEF = _mm256_load_ps(w + 40); vacc01234567p0 = _mm256_fmadd_ps(vi2x01234567, vk2x01234567, vacc01234567p0); vacc89ABCDEFp0 = _mm256_fmadd_ps(vi2x89ABCDEF, vk2x89ABCDEF, vacc89ABCDEFp0); const __m256 vi3x01234567 = _mm256_loadu_ps(i3); const __m256 vi3x89ABCDEF = _mm256_loadu_ps(i3 + 8); i3 += 16; const __m256 vk3x01234567 = _mm256_load_ps(w + 48); const __m256 vk3x89ABCDEF = _mm256_load_ps(w + 56); vacc01234567p0 = _mm256_fmadd_ps(vi3x01234567, vk3x01234567, vacc01234567p0); vacc89ABCDEFp0 = _mm256_fmadd_ps(vi3x89ABCDEF, vk3x89ABCDEF, vacc89ABCDEFp0); const __m256 vi4x01234567 = _mm256_loadu_ps(i4); const __m256 vi4x89ABCDEF = _mm256_loadu_ps(i4 + 8); i4 += 16; const __m256 vk4x01234567 = _mm256_load_ps(w + 64); const __m256 vk4x89ABCDEF = _mm256_load_ps(w + 72); vacc01234567p0 = _mm256_fmadd_ps(vi4x01234567, vk4x01234567, vacc01234567p0); vacc89ABCDEFp0 = _mm256_fmadd_ps(vi4x89ABCDEF, vk4x89ABCDEF, vacc89ABCDEFp0); w += 80; _mm256_store_ps(b, vacc01234567p0); _mm256_store_ps(b + 8, vacc89ABCDEFp0); b += 16; } for (; c >= 8; c -= 8) { __m256 vacc01234567p0 = _mm256_load_ps(b); const __m256 vi0x01234567 = _mm256_loadu_ps(i0); i0 += 8; const __m256 vk0x01234567 = _mm256_load_ps(w); vacc01234567p0 = _mm256_fmadd_ps(vi0x01234567, vk0x01234567, vacc01234567p0); const __m256 vi1x01234567 = _mm256_loadu_ps(i1); i1 += 8; const __m256 vk1x01234567 = _mm256_load_ps(w + 8); vacc01234567p0 = _mm256_fmadd_ps(vi1x01234567, vk1x01234567, vacc01234567p0); const __m256 vi2x01234567 = _mm256_loadu_ps(i2); i2 += 8; const __m256 vk2x01234567 = _mm256_load_ps(w + 16); vacc01234567p0 = _mm256_fmadd_ps(vi2x01234567, vk2x01234567, vacc01234567p0); const __m256 vi3x01234567 = _mm256_loadu_ps(i3); i3 += 8; const __m256 vk3x01234567 = _mm256_load_ps(w + 24); vacc01234567p0 = _mm256_fmadd_ps(vi3x01234567, vk3x01234567, vacc01234567p0); const __m256 vi4x01234567 = _mm256_loadu_ps(i4); i4 += 8; const __m256 vk4x01234567 = _mm256_load_ps(w + 32); vacc01234567p0 = _mm256_fmadd_ps(vi4x01234567, vk4x01234567, vacc01234567p0); w += 40; _mm256_store_ps(b, vacc01234567p0); b += 8; } if (c != 0) { assert(c >= 1); assert(c <= 7); const __m256i vmask = _mm256_loadu_si256((const __m256i*) &mask_table[7 - c]); __m256 vacc01234567p0 = _mm256_load_ps(b); const __m256 vi0x01234567 = _mm256_maskload_ps(i0, vmask); const __m256 vk0x01234567 = _mm256_load_ps(w); vacc01234567p0 = _mm256_fmadd_ps(vi0x01234567, vk0x01234567, vacc01234567p0); const __m256 vi1x01234567 = _mm256_maskload_ps(i1, vmask); const __m256 vk1x01234567 = _mm256_load_ps(w + 8); vacc01234567p0 = _mm256_fmadd_ps(vi1x01234567, vk1x01234567, vacc01234567p0); const __m256 vi2x01234567 = _mm256_maskload_ps(i2, vmask); const __m256 vk2x01234567 = _mm256_load_ps(w + 16); vacc01234567p0 = _mm256_fmadd_ps(vi2x01234567, vk2x01234567, vacc01234567p0); const __m256 vi3x01234567 = _mm256_maskload_ps(i3, vmask); const __m256 vk3x01234567 = _mm256_load_ps(w + 24); vacc01234567p0 = _mm256_fmadd_ps(vi3x01234567, vk3x01234567, vacc01234567p0); const __m256 vi4x01234567 = _mm256_maskload_ps(i4, vmask); const __m256 vk4x01234567 = _mm256_load_ps(w + 32); vacc01234567p0 = _mm256_fmadd_ps(vi4x01234567, vk4x01234567, vacc01234567p0); w += 40; _mm256_store_ps(b, vacc01234567p0); } } // Last pass to process up to 5 inputs. { float* b = buffer; const float* i0 = input[0]; assert(i0 != NULL); if XNN_UNPREDICTABLE(i0 != zero) { i0 = (const float*) ((uintptr_t) i0 + input_offset); } const float* i1 = input[1]; assert(i1 != NULL); if XNN_UNPREDICTABLE(i1 != zero) { i1 = (const float*) ((uintptr_t) i1 + input_offset); } const float* i2 = input[2]; assert(i2 != NULL); if XNN_UNPREDICTABLE(i2 != zero) { i2 = (const float*) ((uintptr_t) i2 + input_offset); } const float* i3 = input[3]; assert(i3 != NULL); if XNN_UNPREDICTABLE(i3 != zero) { i3 = (const float*) ((uintptr_t) i3 + input_offset); } const float* i4 = input[4]; assert(i4 != NULL); if XNN_UNPREDICTABLE(i4 != zero) { i4 = (const float*) ((uintptr_t) i4 + input_offset); } size_t c = channels; for (; c >= 16; c -= 16) { __m256 vacc01234567p0 = _mm256_load_ps(b); __m256 vacc89ABCDEFp0 = _mm256_load_ps(b + 8); b += 16; const __m256 vi0x01234567 = _mm256_loadu_ps(i0); const __m256 vi0x89ABCDEF = _mm256_loadu_ps(i0 + 8); i0 += 16; __m256 vk0x01234567 = _mm256_load_ps(w); __m256 vk0x89ABCDEF = _mm256_load_ps(w + 8); vacc01234567p0 = _mm256_fmadd_ps(vi0x01234567, vk0x01234567, vacc01234567p0); vacc89ABCDEFp0 = _mm256_fmadd_ps(vi0x89ABCDEF, vk0x89ABCDEF, vacc89ABCDEFp0); const __m256 vi1x01234567 = _mm256_loadu_ps(i1); const __m256 vi1x89ABCDEF = _mm256_loadu_ps(i1 + 8); i1 += 16; __m256 vk1x01234567 = _mm256_load_ps(w + 16); __m256 vk1x89ABCDEF = _mm256_load_ps(w + 24); vacc01234567p0 = _mm256_fmadd_ps(vi1x01234567, vk1x01234567, vacc01234567p0); vacc89ABCDEFp0 = _mm256_fmadd_ps(vi1x89ABCDEF, vk1x89ABCDEF, vacc89ABCDEFp0); const __m256 vi2x01234567 = _mm256_loadu_ps(i2); const __m256 vi2x89ABCDEF = _mm256_loadu_ps(i2 + 8); i2 += 16; __m256 vk2x01234567 = _mm256_load_ps(w + 32); __m256 vk2x89ABCDEF = _mm256_load_ps(w + 40); vacc01234567p0 = _mm256_fmadd_ps(vi2x01234567, vk2x01234567, vacc01234567p0); vacc89ABCDEFp0 = _mm256_fmadd_ps(vi2x89ABCDEF, vk2x89ABCDEF, vacc89ABCDEFp0); const __m256 vi3x01234567 = _mm256_loadu_ps(i3); const __m256 vi3x89ABCDEF = _mm256_loadu_ps(i3 + 8); i3 += 16; __m256 vk3x01234567 = _mm256_load_ps(w + 48); __m256 vk3x89ABCDEF = _mm256_load_ps(w + 56); vacc01234567p0 = _mm256_fmadd_ps(vi3x01234567, vk3x01234567, vacc01234567p0); vacc89ABCDEFp0 = _mm256_fmadd_ps(vi3x89ABCDEF, vk3x89ABCDEF, vacc89ABCDEFp0); const __m256 vi4x01234567 = _mm256_loadu_ps(i4); const __m256 vi4x89ABCDEF = _mm256_loadu_ps(i4 + 8); i4 += 16; __m256 vk4x01234567 = _mm256_load_ps(w + 64); __m256 vk4x89ABCDEF = _mm256_load_ps(w + 72); vacc01234567p0 = _mm256_fmadd_ps(vi4x01234567, vk4x01234567, vacc01234567p0); vacc89ABCDEFp0 = _mm256_fmadd_ps(vi4x89ABCDEF, vk4x89ABCDEF, vacc89ABCDEFp0); w += 80; __m256 vacc01234567 = _mm256_max_ps(vmin, vacc01234567p0); __m256 vacc89ABCDEF = _mm256_max_ps(vmin, vacc89ABCDEFp0); vacc01234567 = _mm256_min_ps(vmax, vacc01234567); vacc89ABCDEF = _mm256_min_ps(vmax, vacc89ABCDEF); _mm256_storeu_ps(output, vacc01234567); _mm256_storeu_ps(output + 8, vacc89ABCDEF); output += 16; } for (; c >= 8; c -= 8) { __m256 vacc01234567p0 = _mm256_load_ps(b); b += 8; const __m256 vi0x01234567 = _mm256_loadu_ps(i0); i0 += 8; __m256 vk0x01234567 = _mm256_load_ps(w); vacc01234567p0 = _mm256_fmadd_ps(vi0x01234567, vk0x01234567, vacc01234567p0); const __m256 vi1x01234567 = _mm256_loadu_ps(i1); i1 += 8; __m256 vk1x01234567 = _mm256_load_ps(w + 8); vacc01234567p0 = _mm256_fmadd_ps(vi1x01234567, vk1x01234567, vacc01234567p0); const __m256 vi2x01234567 = _mm256_loadu_ps(i2); i2 += 8; __m256 vk2x01234567 = _mm256_load_ps(w + 16); vacc01234567p0 = _mm256_fmadd_ps(vi2x01234567, vk2x01234567, vacc01234567p0); const __m256 vi3x01234567 = _mm256_loadu_ps(i3); i3 += 8; __m256 vk3x01234567 = _mm256_load_ps(w + 24); vacc01234567p0 = _mm256_fmadd_ps(vi3x01234567, vk3x01234567, vacc01234567p0); const __m256 vi4x01234567 = _mm256_loadu_ps(i4); i4 += 8; __m256 vk4x01234567 = _mm256_load_ps(w + 32); vacc01234567p0 = _mm256_fmadd_ps(vi4x01234567, vk4x01234567, vacc01234567p0); w += 40; __m256 vacc01234567 = _mm256_max_ps(vmin, vacc01234567p0); vacc01234567 = _mm256_min_ps(vmax, vacc01234567); _mm256_storeu_ps(output, vacc01234567); output += 8; } if XNN_UNLIKELY(c != 0) { assert(c >= 1); assert(c <= 7); __m256 vacc01234567p0 = _mm256_load_ps(b); const __m256i vmask = _mm256_loadu_si256((const __m256i*) &mask_table[7 - c]); const __m256 vi0x01234567 = _mm256_maskload_ps(i0, vmask); __m256 vk0x01234567 = _mm256_load_ps(w); vacc01234567p0 = _mm256_fmadd_ps(vi0x01234567, vk0x01234567, vacc01234567p0); const __m256 vi1x01234567 = _mm256_maskload_ps(i1, vmask); __m256 vk1x01234567 = _mm256_load_ps(w + 8); vacc01234567p0 = _mm256_fmadd_ps(vi1x01234567, vk1x01234567, vacc01234567p0); const __m256 vi2x01234567 = _mm256_maskload_ps(i2, vmask); __m256 vk2x01234567 = _mm256_load_ps(w + 16); vacc01234567p0 = _mm256_fmadd_ps(vi2x01234567, vk2x01234567, vacc01234567p0); const __m256 vi3x01234567 = _mm256_maskload_ps(i3, vmask); __m256 vk3x01234567 = _mm256_load_ps(w + 24); vacc01234567p0 = _mm256_fmadd_ps(vi3x01234567, vk3x01234567, vacc01234567p0); const __m256 vi4x01234567 = _mm256_maskload_ps(i4, vmask); __m256 vk4x01234567 = _mm256_load_ps(w + 32); vacc01234567p0 = _mm256_fmadd_ps(vi4x01234567, vk4x01234567, vacc01234567p0); __m256 vacc01234567 = _mm256_max_ps(vmin, vacc01234567p0); vacc01234567 = _mm256_min_ps(vmax, vacc01234567); __m128 vacc0123 = _mm256_castps256_ps128(vacc01234567); if (c & 4) { _mm_storeu_ps(output, vacc0123); vacc0123 = _mm256_extractf128_ps(vacc01234567, 1); output += 4; } if (c & 2) { _mm_storel_pi((__m64*) output, vacc0123); vacc0123 = _mm_movehl_ps(vacc0123, vacc0123); output += 2; } if (c & 1) { _mm_store_ss(output, vacc0123); output += 1; } } } input = (const float**) ((uintptr_t) input + input_stride); output = (float*) ((uintptr_t) output + output_increment); } while (--output_width != 0); }