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[onert-micro] Revise softmax input grad #14100

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Sep 27, 2024
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[onert-micro] Revise softmax input grad #14100

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27 changes: 16 additions & 11 deletions onert-micro/onert-micro/include/pal/common/PALSoftmaxInputGrad.h
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Original file line number Diff line number Diff line change
Expand Up @@ -37,20 +37,25 @@ void inline SoftmaxInputGrad(const float *dloss_doutput_data,
{
assert(dloss_doutput_shape.dimensionsCount() == 2);
assert(dloss_doutput_shape.dims(0) == 1);
const uint32_t output_dim = dloss_doutput_shape.dims(dloss_doutput_shape.dimensionsCount() - 1);
for (int i = 0; i < output_dim; ++i)
const uint32_t width = dloss_doutput_shape.dims(dloss_doutput_shape.dimensionsCount() - 1);
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for (int w1 = 0; w1 < width; ++w1)
{
for (int j = 0; j < output_dim; ++j)
float sum = 0.0f;
for (int w2 = 0; w2 < width; ++w2)
{
jacobian_row_data[j] = -calculated_data[i] * calculated_data[j];
float val;
if (w1 == w2)
{
val = calculated_data[w2] * (1.f - calculated_data[w2]);
}
else
{
val = -calculated_data[w2] * calculated_data[w1];
}
val *= dloss_doutput_data[w2];
sum += val;
}
jacobian_row_data[i] += calculated_data[i];
float total = 0.f;
for (int j = 0; j < output_dim; ++j)
{
total += jacobian_row_data[j] * dloss_doutput_data[j];
}
dloss_dinput_data[i] = total;
dloss_dinput_data[w1] = sum;
}
}

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