| // Copyright (c) Facebook, Inc. and its affiliates. |
| // All rights reserved. |
| // |
| // 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 <arm_neon.h> |
| |
| #include <xnnpack/maxpool.h> |
| |
| |
| void xnn_u8_maxpool_ukernel_9p8x__neon_c16( |
| size_t output_pixels, |
| size_t kernel_elements, |
| size_t channels, |
| const uint8_t** input, |
| size_t input_offset, |
| uint8_t* output, |
| size_t input_increment, |
| size_t output_increment, |
| const union xnn_u8_output_params params[restrict static 1]) |
| { |
| assert(output_pixels != 0); |
| assert(kernel_elements != 0); |
| assert(channels != 0); |
| |
| const uint8x16_t voutput_max = vld1q_dup_u8(¶ms->neon.max); |
| const uint8x16_t voutput_min = vld1q_dup_u8(¶ms->neon.min); |
| do { |
| uint8_t* o = output; |
| { |
| const uint8_t* i0 = *input++; |
| const uint8_t* i1 = *input++; |
| const uint8_t* i2 = *input++; |
| const uint8_t* i3 = *input++; |
| const uint8_t* i4 = *input++; |
| const uint8_t* i5 = *input++; |
| const uint8_t* i6 = *input++; |
| const uint8_t* i7 = *input++; |
| const uint8_t* i8 = *input++; |
| i0 = (const uint8_t*) ((uintptr_t) i0 + input_offset); |
| i1 = (const uint8_t*) ((uintptr_t) i1 + input_offset); |
| i2 = (const uint8_t*) ((uintptr_t) i2 + input_offset); |
| i3 = (const uint8_t*) ((uintptr_t) i3 + input_offset); |
| i4 = (const uint8_t*) ((uintptr_t) i4 + input_offset); |
| i5 = (const uint8_t*) ((uintptr_t) i5 + input_offset); |
| i6 = (const uint8_t*) ((uintptr_t) i6 + input_offset); |
| i7 = (const uint8_t*) ((uintptr_t) i7 + input_offset); |
| i8 = (const uint8_t*) ((uintptr_t) i8 + input_offset); |
| if (kernel_elements < 2) { |
| i1 = i0; |
| } |
| if (kernel_elements <= 2) { |
| i2 = i0; |
| } |
| if (kernel_elements < 4) { |
| i3 = i0; |
| } |
| if (kernel_elements <= 4) { |
| i4 = i0; |
| } |
| if (kernel_elements < 6) { |
| i5 = i0; |
| } |
| if (kernel_elements <= 6) { |
| i6 = i0; |
| } |
| if (kernel_elements < 8) { |
| i7 = i0; |
| } |
| if (kernel_elements <= 8) { |
| i8 = i0; |
| } |
| |
| size_t c = channels; |
| for (; c >= 16; c -= 16) { |
| const uint8x16_t vi0 = vld1q_u8(i0); i0 += 16; |
| const uint8x16_t vi1 = vld1q_u8(i1); i1 += 16; |
| const uint8x16_t vi2 = vld1q_u8(i2); i2 += 16; |
| const uint8x16_t vi3 = vld1q_u8(i3); i3 += 16; |
| const uint8x16_t vi4 = vld1q_u8(i4); i4 += 16; |
| const uint8x16_t vi5 = vld1q_u8(i5); i5 += 16; |
| const uint8x16_t vi6 = vld1q_u8(i6); i6 += 16; |
| const uint8x16_t vi7 = vld1q_u8(i7); i7 += 16; |
| const uint8x16_t vi8 = vld1q_u8(i8); i8 += 16; |
| |
| const uint8x16_t vmax018 = vmaxq_u8(vmaxq_u8(vi0, vi1), vi8); |
| const uint8x16_t vmax23 = vmaxq_u8(vi2, vi3); |
| const uint8x16_t vmax45 = vmaxq_u8(vi4, vi5); |
| const uint8x16_t vmax67 = vmaxq_u8(vi6, vi7); |
| |
| const uint8x16_t vmax2345 = vmaxq_u8(vmax23, vmax45); |
| const uint8x16_t vmax01678 = vmaxq_u8(vmax018, vmax67); |
| const uint8x16_t vmax = vmaxq_u8(vmax2345, vmax01678); |
| const uint8x16_t vout = vmaxq_u8(vminq_u8(vmax, voutput_max), voutput_min); |
| |
| vst1q_u8(o, vout); o += 16; |
| } |
| if (c != 0) { |
| const uint8x16_t vi0 = vld1q_u8(i0); |
| const uint8x16_t vi1 = vld1q_u8(i1); |
| const uint8x16_t vi2 = vld1q_u8(i2); |
| const uint8x16_t vi3 = vld1q_u8(i3); |
| const uint8x16_t vi4 = vld1q_u8(i4); |
| const uint8x16_t vi5 = vld1q_u8(i5); |
| const uint8x16_t vi6 = vld1q_u8(i6); |
| const uint8x16_t vi7 = vld1q_u8(i7); |
| const uint8x16_t vi8 = vld1q_u8(i8); |
| |
| const uint8x16_t vmax018 = vmaxq_u8(vmaxq_u8(vi0, vi1), vi8); |
| const uint8x16_t vmax23 = vmaxq_u8(vi2, vi3); |
| const uint8x16_t vmax45 = vmaxq_u8(vi4, vi5); |
| const uint8x16_t vmax67 = vmaxq_u8(vi6, vi7); |
| |
| const uint8x16_t vmax2345 = vmaxq_u8(vmax23, vmax45); |
| const uint8x16_t vmax01678 = vmaxq_u8(vmax018, vmax67); |
| const uint8x16_t vmax = vmaxq_u8(vmax2345, vmax01678); |
| const uint8x16_t vout = vmaxq_u8(vminq_u8(vmax, voutput_max), voutput_min); |
| |
| uint8x8_t vout_lo = vget_low_u8(vout); |
| if (c & 8) { |
| vst1_u8(o, vout_lo); o += 8; |
| vout_lo = vget_high_u8(vout); |
| } |
| if (c & 4) { |
| vst1_lane_u32(__builtin_assume_aligned(o, 1), vreinterpret_u32_u8(vout_lo), 0); o += 4; |
| vout_lo = vext_u8(vout_lo, vout_lo, 4); |
| } |
| if (c & 2) { |
| vst1_lane_u16(__builtin_assume_aligned(o, 1), vreinterpret_u16_u8(vout_lo), 0); o += 2; |
| vout_lo = vext_u8(vout_lo, vout_lo, 2); |
| } |
| if (c & 1) { |
| vst1_lane_u8(o, vout_lo, 0); o += 1; |
| } |
| } |
| } |
| |
| for (ptrdiff_t k = (ptrdiff_t) kernel_elements - 9; k > 0; k -= 8) { |
| const uint8_t* i0 = *input++; |
| const uint8_t* i1 = *input++; |
| const uint8_t* i2 = *input++; |
| const uint8_t* i3 = *input++; |
| const uint8_t* i4 = *input++; |
| const uint8_t* i5 = *input++; |
| const uint8_t* i6 = *input++; |
| const uint8_t* i7 = *input++; |
| i0 = (const uint8_t*) ((uintptr_t) i0 + input_offset); |
| i1 = (const uint8_t*) ((uintptr_t) i1 + input_offset); |
| i2 = (const uint8_t*) ((uintptr_t) i2 + input_offset); |
| i3 = (const uint8_t*) ((uintptr_t) i3 + input_offset); |
| i4 = (const uint8_t*) ((uintptr_t) i4 + input_offset); |
| i5 = (const uint8_t*) ((uintptr_t) i5 + input_offset); |
| i6 = (const uint8_t*) ((uintptr_t) i6 + input_offset); |
| i7 = (const uint8_t*) ((uintptr_t) i7 + input_offset); |
| if (k < 2) { |
| i1 = i0; |
| } |
| if (k <= 2) { |
| i2 = i0; |
| } |
| if (k < 4) { |
| i3 = i0; |
| } |
| if (k <= 4) { |
| i4 = i0; |
| } |
| if (k < 6) { |
| i5 = i0; |
| } |
| if (k <= 6) { |
| i6 = i0; |
| } |
| if (k < 8) { |
| i7 = i0; |
| } |
| |
| o = output; |
| size_t c = channels; |
| for (; c >= 16; c -= 16) { |
| const uint8x16_t vi0 = vld1q_u8(i0); i0 += 16; |
| const uint8x16_t vi1 = vld1q_u8(i1); i1 += 16; |
| const uint8x16_t vi2 = vld1q_u8(i2); i2 += 16; |
| const uint8x16_t vi3 = vld1q_u8(i3); i3 += 16; |
| const uint8x16_t vi4 = vld1q_u8(i4); i4 += 16; |
| const uint8x16_t vi5 = vld1q_u8(i5); i5 += 16; |
| const uint8x16_t vi6 = vld1q_u8(i6); i6 += 16; |
| const uint8x16_t vi7 = vld1q_u8(i7); i7 += 16; |
| const uint8x16_t vo = vld1q_u8(o); |
| |
| const uint8x16_t vmax01 = vmaxq_u8(vmaxq_u8(vi0, vi1), vo); |
| const uint8x16_t vmax23 = vmaxq_u8(vi2, vi3); |
| const uint8x16_t vmax45 = vmaxq_u8(vi4, vi5); |
| const uint8x16_t vmax67 = vmaxq_u8(vi6, vi7); |
| |
| const uint8x16_t vmax2345 = vmaxq_u8(vmax23, vmax45); |
| const uint8x16_t vmax0167 = vmaxq_u8(vmax01, vmax67); |
| const uint8x16_t vmax = vmaxq_u8(vmax2345, vmax0167); |
| const uint8x16_t vout = vmaxq_u8(vminq_u8(vmax, voutput_max), voutput_min); |
| |
| vst1q_u8(o, vout); o += 16; |
| } |
| if (c != 0) { |
| const uint8x16_t vi0 = vld1q_u8(i0); |
| const uint8x16_t vi1 = vld1q_u8(i1); |
| const uint8x16_t vi2 = vld1q_u8(i2); |
| const uint8x16_t vi3 = vld1q_u8(i3); |
| const uint8x16_t vi4 = vld1q_u8(i4); |
| const uint8x16_t vi5 = vld1q_u8(i5); |
| const uint8x16_t vi6 = vld1q_u8(i6); |
| const uint8x16_t vi7 = vld1q_u8(i7); |
| const uint8x16_t vo = vld1q_u8(o); |
| |
| const uint8x16_t vmax01 = vmaxq_u8(vmaxq_u8(vi0, vi1), vo); |
| const uint8x16_t vmax23 = vmaxq_u8(vi2, vi3); |
| const uint8x16_t vmax45 = vmaxq_u8(vi4, vi5); |
| const uint8x16_t vmax67 = vmaxq_u8(vi6, vi7); |
| |
| const uint8x16_t vmax2345 = vmaxq_u8(vmax23, vmax45); |
| const uint8x16_t vmax0167 = vmaxq_u8(vmax01, vmax67); |
| const uint8x16_t vmax = vmaxq_u8(vmax2345, vmax0167); |
| const uint8x16_t vout = vmaxq_u8(vminq_u8(vmax, voutput_max), voutput_min); |
| |
| uint8x8_t vout_lo = vget_low_u8(vout); |
| if (c & 8) { |
| vst1_u8(o, vout_lo); o += 8; |
| vout_lo = vget_high_u8(vout); |
| } |
| if (c & 4) { |
| vst1_lane_u32(__builtin_assume_aligned(o, 1), vreinterpret_u32_u8(vout_lo), 0); o += 4; |
| vout_lo = vext_u8(vout_lo, vout_lo, 4); |
| } |
| if (c & 2) { |
| vst1_lane_u16(__builtin_assume_aligned(o, 1), vreinterpret_u16_u8(vout_lo), 0); o += 2; |
| vout_lo = vext_u8(vout_lo, vout_lo, 2); |
| } |
| if (c & 1) { |
| vst1_lane_u8(o, vout_lo, 0); o += 1; |
| } |
| } |
| } |
| input = (const uint8_t**) ((uintptr_t) input + input_increment); |
| output = (uint8_t*) ((uintptr_t) o + output_increment); |
| } while (--output_pixels != 0); |
| } |
