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// 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>
XNN_DISABLE_TSAN void xnn_u8_maxpool_minmax_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_minmax_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_DISABLE_TSAN
{
assert(output_pixels != 0);
assert(kernel_elements != 0);
assert(channels != 0);
const uint8x16_t voutput_max = vld1q_dup_u8(&params->neon.max);
const uint8x16_t voutput_min = vld1q_dup_u8(&params->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);
}