unimore/hpc-2022-g3
unimore/hpc-2022-g3
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Use a three-line circular buffer

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Co-authored-by: Fabio Zanichelli <274956@studenti.unimore.it>
Co-authored-by: Stefano Pigozzi <256895@studenti.unimore.it>
This commit is contained in:
Gattopandacorno 2022-12-19 11:38:30 +01:00
parent ae5f2d0c52
commit f0cb1c1bed
1 changed files with 9 additions and 2 deletions
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11
hls/assignment/sobel/sobel.cpp
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@ -1,3 +1,4 @@
#include <cstring>
#include <math.h> #include <math.h>
#include "sobel.h" #include "sobel.h"
@ -14,6 +15,10 @@ void sobel(uint8_t *__restrict__ out, uint8_t *__restrict__ in, const int width,
{-1, 0, 1} {-1, 0, 1}
}; };
// Carica le prime tre righe nel buffer
uint8_t inBuffer[3*height];
memcpy(inBuffer, in, 3*height*sizeof(uint8_t));
esternoY: esternoY:
for (int y = 0; y < height - 2; y++) for (int y = 0; y < height - 2; y++)
{ {
@ -30,7 +35,7 @@ void sobel(uint8_t *__restrict__ out, uint8_t *__restrict__ in, const int width,
{ {
#pragma HLS UNROLL #pragma HLS UNROLL
const int inYOffset = (y + k) * width; const int inYOffset = ((y + k) % 3) * width;
internoX: internoX:
for (int z = 0; z < 3; z++) for (int z = 0; z < 3; z++)
@ -40,7 +45,7 @@ void sobel(uint8_t *__restrict__ out, uint8_t *__restrict__ in, const int width,
const int inXOffset = x + z; const int inXOffset = x + z;
const int inOffset = inYOffset + inXOffset; const int inOffset = inYOffset + inXOffset;
const int inElement = in[inOffset]; const int inElement = inBuffer[inOffset];
dx += sobelFilter[k][z] * inElement; dx += sobelFilter[k][z] * inElement;
dy += sobelFilter[z][k] * inElement; dy += sobelFilter[z][k] * inElement;
@ -53,5 +58,7 @@ void sobel(uint8_t *__restrict__ out, uint8_t *__restrict__ in, const int width,
out[outOffset] = sqrt((float)((dx * dx) + (dy * dy))); out[outOffset] = sqrt((float)((dx * dx) + (dy * dy)));
} }
memcpy(inBuffer, in + (y % 3) * height, height*sizeof(uint8_t));
} }
} }