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// 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 <emmintrin.h>
#include <xnnpack/argmaxpool.h>
void xnn_f32_argmaxpool_ukernel_9x__sse2_c4(
size_t output_pixels,
size_t pooling_elements,
size_t channels,
const float** input,
size_t input_offset,
float* output,
uint32_t* index,
size_t input_increment,
size_t output_increment) XNN_OOB_READS
{
assert(output_pixels != 0);
assert(pooling_elements != 0);
assert(pooling_elements <= 9);
assert(channels != 0);
do {
const float* i0 = input[0];
const float* i1 = input[1];
const float* i2 = input[2];
const float* i3 = input[3];
const float* i4 = input[4];
const float* i5 = input[5];
const float* i6 = input[6];
const float* i7 = input[7];
const float* i8 = input[8];
i0 = (const float*) ((uintptr_t) i0 + input_offset);
i1 = (const float*) ((uintptr_t) i1 + input_offset);
i2 = (const float*) ((uintptr_t) i2 + input_offset);
i3 = (const float*) ((uintptr_t) i3 + input_offset);
i4 = (const float*) ((uintptr_t) i4 + input_offset);
i5 = (const float*) ((uintptr_t) i5 + input_offset);
i6 = (const float*) ((uintptr_t) i6 + input_offset);
i7 = (const float*) ((uintptr_t) i7 + input_offset);
i8 = (const float*) ((uintptr_t) i8 + input_offset);
if (pooling_elements < 2) {
i1 = i0;
}
if (pooling_elements <= 2) {
i2 = i0;
}
if (pooling_elements < 4) {
i3 = i0;
}
if (pooling_elements <= 4) {
i4 = i0;
}
if (pooling_elements < 6) {
i5 = i0;
}
if (pooling_elements <= 6) {
i6 = i0;
}
if (pooling_elements < 8) {
i7 = i0;
}
if (pooling_elements <= 8) {
i8 = i0;
}
size_t c = channels;
for (; c >= 4; c -= 4) {
const __m128 vi0 = _mm_loadu_ps(i0);
i0 += 4;
const __m128 vi1 = _mm_loadu_ps(i1);
i1 += 4;
const __m128 vi2 = _mm_loadu_ps(i2);
i2 += 4;
const __m128 vi3 = _mm_loadu_ps(i3);
i3 += 4;
const __m128 vi4 = _mm_loadu_ps(i4);
i4 += 4;
const __m128 vi5 = _mm_loadu_ps(i5);
i5 += 4;
const __m128 vi6 = _mm_loadu_ps(i6);
i6 += 4;
const __m128 vi7 = _mm_loadu_ps(i7);
i7 += 4;
const __m128 vi8 = _mm_loadu_ps(i8);
i8 += 4;
__m128 vmax = vi0;
__m128i vidx = _mm_setzero_si128();
const __m128i vm1 = _mm_castps_si128(_mm_cmpgt_ps(vi1, vmax));
vmax = _mm_max_ps(vi1, vmax);
vidx = _mm_or_si128(_mm_andnot_si128(vm1, vidx), _mm_and_si128(vm1, _mm_set1_epi32(1)));
const __m128i vm2 = _mm_castps_si128(_mm_cmpgt_ps(vi2, vmax));
vmax = _mm_max_ps(vi2, vmax);
vidx = _mm_or_si128(_mm_andnot_si128(vm2, vidx), _mm_and_si128(vm2, _mm_set1_epi32(2)));
const __m128i vm3 = _mm_castps_si128(_mm_cmpgt_ps(vi3, vmax));
vmax = _mm_max_ps(vi3, vmax);
vidx = _mm_or_si128(_mm_andnot_si128(vm3, vidx), _mm_and_si128(vm3, _mm_set1_epi32(3)));
const __m128i vm4 = _mm_castps_si128(_mm_cmpgt_ps(vi4, vmax));
vmax = _mm_max_ps(vi4, vmax);
vidx = _mm_or_si128(_mm_andnot_si128(vm4, vidx), _mm_and_si128(vm4, _mm_set1_epi32(4)));
const __m128i vm5 = _mm_castps_si128(_mm_cmpgt_ps(vi5, vmax));
vmax = _mm_max_ps(vi5, vmax);
vidx = _mm_or_si128(_mm_andnot_si128(vm5, vidx), _mm_and_si128(vm5, _mm_set1_epi32(5)));
const __m128i vm6 = _mm_castps_si128(_mm_cmpgt_ps(vi6, vmax));
vmax = _mm_max_ps(vi6, vmax);
vidx = _mm_or_si128(_mm_andnot_si128(vm6, vidx), _mm_and_si128(vm6, _mm_set1_epi32(6)));
const __m128i vm7 = _mm_castps_si128(_mm_cmpgt_ps(vi7, vmax));
vmax = _mm_max_ps(vi7, vmax);
vidx = _mm_or_si128(_mm_andnot_si128(vm7, vidx), _mm_and_si128(vm7, _mm_set1_epi32(7)));
const __m128i vm8 = _mm_castps_si128(_mm_cmpgt_ps(vi8, vmax));
vmax = _mm_max_ps(vi8, vmax);
vidx = _mm_or_si128(_mm_andnot_si128(vm8, vidx), _mm_and_si128(vm8, _mm_set1_epi32(8)));
_mm_storeu_ps(output, vmax);
output += 4;
_mm_storeu_si128((__m128i*) index, vidx);
index += 4;
}
if (c != 0) {
const __m128 vi0 = _mm_loadu_ps(i0);
const __m128 vi1 = _mm_loadu_ps(i1);
const __m128 vi2 = _mm_loadu_ps(i2);
const __m128 vi3 = _mm_loadu_ps(i3);
const __m128 vi4 = _mm_loadu_ps(i4);
const __m128 vi5 = _mm_loadu_ps(i5);
const __m128 vi6 = _mm_loadu_ps(i6);
const __m128 vi7 = _mm_loadu_ps(i7);
const __m128 vi8 = _mm_loadu_ps(i8);
__m128 vmax = vi0;
__m128i vidx = _mm_setzero_si128();
const __m128i vm1 = _mm_castps_si128(_mm_cmpgt_ps(vi1, vmax));
vmax = _mm_max_ps(vi1, vmax);
vidx = _mm_or_si128(_mm_andnot_si128(vm1, vidx), _mm_and_si128(vm1, _mm_set1_epi32(1)));
const __m128i vm2 = _mm_castps_si128(_mm_cmpgt_ps(vi2, vmax));
vmax = _mm_max_ps(vi2, vmax);
vidx = _mm_or_si128(_mm_andnot_si128(vm2, vidx), _mm_and_si128(vm2, _mm_set1_epi32(2)));
const __m128i vm3 = _mm_castps_si128(_mm_cmpgt_ps(vi3, vmax));
vmax = _mm_max_ps(vi3, vmax);
vidx = _mm_or_si128(_mm_andnot_si128(vm3, vidx), _mm_and_si128(vm3, _mm_set1_epi32(3)));
const __m128i vm4 = _mm_castps_si128(_mm_cmpgt_ps(vi4, vmax));
vmax = _mm_max_ps(vi4, vmax);
vidx = _mm_or_si128(_mm_andnot_si128(vm4, vidx), _mm_and_si128(vm4, _mm_set1_epi32(4)));
const __m128i vm5 = _mm_castps_si128(_mm_cmpgt_ps(vi5, vmax));
vmax = _mm_max_ps(vi5, vmax);
vidx = _mm_or_si128(_mm_andnot_si128(vm5, vidx), _mm_and_si128(vm5, _mm_set1_epi32(5)));
const __m128i vm6 = _mm_castps_si128(_mm_cmpgt_ps(vi6, vmax));
vmax = _mm_max_ps(vi6, vmax);
vidx = _mm_or_si128(_mm_andnot_si128(vm6, vidx), _mm_and_si128(vm6, _mm_set1_epi32(6)));
const __m128i vm7 = _mm_castps_si128(_mm_cmpgt_ps(vi7, vmax));
vmax = _mm_max_ps(vi7, vmax);
vidx = _mm_or_si128(_mm_andnot_si128(vm7, vidx), _mm_and_si128(vm7, _mm_set1_epi32(7)));
const __m128i vm8 = _mm_castps_si128(_mm_cmpgt_ps(vi8, vmax));
vmax = _mm_max_ps(vi8, vmax);
vidx = _mm_or_si128(_mm_andnot_si128(vm8, vidx), _mm_and_si128(vm8, _mm_set1_epi32(8)));
if (c & 2) {
_mm_storel_pi((__m64*) output, vmax);
_mm_storel_epi64((__m128i*) index, vidx);
vmax = _mm_movehl_ps(vmax, vmax);
vidx = _mm_unpackhi_epi64(vidx, vidx);
output += 2;
index += 2;
}
if (c & 1) {
_mm_store_ss(output, vmax);
*index = (uint32_t) _mm_cvtsi128_si32(vidx);
output += 1;
index += 1;
}
}
input = (const float**) ((uintptr_t) input + input_increment);
output = (float*) ((uintptr_t) output + output_increment);
index = (uint32_t*) index;
} while (--output_pixels != 0);
}
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