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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 <xnnpack/argmaxpool.h>
#include <xnnpack/math.h>
void xnn_f32_argmaxpool_ukernel_4x__scalar_c1(
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)
{
assert(output_pixels != 0);
assert(pooling_elements != 0);
assert(pooling_elements <= 4);
assert(channels != 0);
do {
const float* i0 = input[0];
const float* i1 = input[1];
const float* i2 = input[2];
const float* i3 = input[3];
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);
if (pooling_elements < 2) {
i1 = i0;
}
if (pooling_elements <= 2) {
i2 = i0;
}
if (pooling_elements != 4) {
i3 = i0;
}
size_t c = channels;
do {
const float vi0 = *i0++;
const float vi1 = *i1++;
const float vi2 = *i2++;
const float vi3 = *i3++;
float vmax = vi0;
uint32_t vidx = 0;
if (vi1 > vmax) {
vmax = vi1;
vidx = 1;
}
if (vi2 > vmax) {
vmax = vi2;
vidx = 2;
}
if (vi3 > vmax) {
vmax = vi3;
vidx = 3;
}
*output++ = vmax;
*index++ = vidx;
} while (--c != 0);
input = (const float**) ((uintptr_t) input + input_increment);
output = (float*) ((uintptr_t) output + output_increment);
} while (--output_pixels != 0);
}
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