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// SPDX-License-Identifier: LGPL-3.0-only
#include "algorithms/simple_clean.h"
#include <algorithm>
#ifdef __SSE__
#define USE_INTRINSICS
#endif
#ifdef USE_INTRINSICS
#include <emmintrin.h>
#include <immintrin.h>
#endif
namespace radler::algorithms::simple_clean {
void SubtractImage(float* image, const float* psf, size_t width, size_t height,
size_t x, size_t y, float factor) {
size_t startX;
size_t startY;
size_t endX;
size_t endY;
const int offsetX = static_cast<int>(x) - width / 2;
const int offsetY = static_cast<int>(y) - height / 2;
if (offsetX > 0) {
startX = offsetX;
} else {
startX = 0;
}
if (offsetY > 0) {
startY = offsetY;
} else {
startY = 0;
}
endX = x + width / 2;
if (endX > width) endX = width;
const bool isAligned = ((endX - startX) % 2) == 0;
if (!isAligned) --endX;
endY = y + height / 2;
if (endY > height) endY = height;
for (size_t ypos = startY; ypos != endY; ++ypos) {
float* imageIter = image + ypos * width + startX;
const float* psfIter = psf + (ypos - offsetY) * width + startX - offsetX;
for (size_t xpos = startX; xpos != endX; xpos++) {
// I've SSE-ified this, but it didn't improve speed at all :-/
// (Compiler probably already did it)
*imageIter -= (*psfIter * factor);
//*(imageIter+1) = *(imageIter+1) - (*(psfIter+1) * factor);
++imageIter;
++psfIter;
}
}
}
void PartialSubtractImage(float* image, const float* psf, size_t width,
size_t height, size_t x, size_t y, float factor,
size_t start_y, size_t end_y) {
size_t startX;
size_t endX;
const int offsetX = static_cast<int>(x) - width / 2;
const int offsetY = static_cast<int>(y) - height / 2;
if (offsetX > 0) {
startX = offsetX;
} else {
startX = 0;
}
if (offsetY > static_cast<int>(start_y)) start_y = offsetY;
endX = x + width / 2;
if (endX > width) endX = width;
const bool isAligned = ((endX - startX) % 2) == 0;
if (!isAligned) --endX;
end_y = std::min(y + height / 2, end_y);
for (size_t ypos = start_y; ypos < end_y; ++ypos) {
float* imageIter = image + ypos * width + startX;
const float* psfIter = psf + (ypos - offsetY) * width + startX - offsetX;
for (size_t xpos = startX; xpos != endX; xpos += 2) {
*imageIter = *imageIter - (*psfIter * factor);
*(imageIter + 1) = *(imageIter + 1) - (*(psfIter + 1) * factor);
imageIter += 2;
psfIter += 2;
}
if (!isAligned) *imageIter -= *psfIter * factor;
}
}
void PartialSubtractImage(float* image, size_t image_width,
[[maybe_unused]] size_t image_height,
const float* psf, size_t psf_width, size_t psf_height,
size_t x, size_t y, float factor, size_t start_y,
size_t end_y) {
size_t startX;
size_t endX;
const int offsetX = static_cast<int>(x) - psf_width / 2;
const int offsetY = static_cast<int>(y) - psf_height / 2;
if (offsetX > 0) {
startX = offsetX;
} else {
startX = 0;
}
if (offsetY > static_cast<int>(start_y)) start_y = offsetY;
endX = std::min(x + psf_width / 2, image_width);
const bool isAligned = ((endX - startX) % 2) == 0;
if (!isAligned) --endX;
end_y = std::min(y + psf_height / 2, end_y);
for (size_t ypos = start_y; ypos < end_y; ++ypos) {
float* imageIter = image + ypos * image_width + startX;
const float* psfIter =
psf + (ypos - offsetY) * psf_width + startX - offsetX;
for (size_t xpos = startX; xpos != endX; xpos += 2) {
*imageIter = *imageIter - (*psfIter * factor);
*(imageIter + 1) = *(imageIter + 1) - (*(psfIter + 1) * factor);
imageIter += 2;
psfIter += 2;
}
if (!isAligned) *imageIter -= *psfIter * factor;
}
}
#if defined __AVX__ && defined USE_INTRINSICS
void PartialSubtractImageAVX(double* image, size_t image_width,
[[maybe_unused]] size_t image_height,
const double* psf, size_t psf_width,
size_t psf_height, size_t x, size_t y,
double factor, size_t start_y, size_t end_y) {
size_t startX;
size_t endX;
const int offsetX = static_cast<int>(x) - psf_width / 2;
const int offsetY = static_cast<int>(y) - psf_height / 2;
if (offsetX > 0) {
startX = offsetX;
} else {
startX = 0;
}
if (offsetY > static_cast<int>(start_y)) start_y = offsetY;
endX = std::min(x + psf_width / 2, image_width);
const size_t unAlignedCount = (endX - startX) % 4;
endX -= unAlignedCount;
end_y = std::min(y + psf_height / 2, end_y);
const __m256d mFactor = _mm256_set1_pd(-factor);
for (size_t ypos = start_y; ypos < end_y; ++ypos) {
double* imageIter = image + ypos * image_width + startX;
const double* psfIter =
psf + (ypos - offsetY) * psf_width + startX - offsetX;
for (size_t xpos = startX; xpos != endX; xpos += 4) {
__m256d imgVal = _mm256_loadu_pd(imageIter),
psfVal = _mm256_loadu_pd(psfIter);
#ifdef __FMA__
_mm256_storeu_pd(imageIter, _mm256_fmadd_pd(psfVal, mFactor, imgVal));
#else
_mm256_storeu_pd(imageIter,
_mm256_add_pd(imgVal, _mm256_mul_pd(psfVal, mFactor)));
#endif
imageIter += 4;
psfIter += 4;
}
for (size_t xpos = endX; xpos != endX + unAlignedCount; ++xpos) {
*imageIter -= *psfIter * factor;
++imageIter;
++psfIter;
}
}
}
#endif
} // namespace radler::algorithms::simple_clean
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