|
void gemm(int TA, int TB, int M, int N, int K, double ALPHA,
|
double *A, int lda,
|
double *B, int ldb,
|
double BETA,
|
double *C, int ldc)
|
{
|
// Assume TA = TB = 0, beta = 1 LULZ
|
int i,j,k;
|
for(i = 0; i < M; ++i){
|
for(k = 0; k < K; ++k){
|
for(j = 0; j < N; ++j){
|
C[i*ldc+j] += ALPHA*A[i*lda+k]*B[k*ldb+j];
|
}
|
}
|
}
|
}
|
|
void im2row(double *image, int h, int w, int c, int size, int stride, double *matrix)
|
{
|
int i;
|
int mc = c;
|
int mw = (size*size);
|
int mh = ((h-size)/stride+1)*((w-size)/stride+1);
|
int msize = mc*mw*mh;
|
for(i = 0; i < msize; ++i){
|
int channel = i/(mh*mw);
|
int block = (i%(mh*mw))/mw;
|
int position = i%mw;
|
int block_h = block/((w-size)/stride+1);
|
int block_w = block%((w-size)/stride+1);
|
int ph, pw, pc;
|
ph = position/size+block_h;
|
pw = position%size+block_w;
|
pc = channel;
|
matrix[i] = image[pc*h*w+ph*w+pw];
|
}
|
}
|
void im2col(double *image, int h, int w, int c, int size, int stride, double *matrix)
|
{
|
int b,p;
|
int blocks = ((h-size)/stride+1)*((w-size)/stride+1);
|
int pixels = (size*size*c);
|
for(b = 0; b < blocks; ++b){
|
int block_h = b/((w-size)/stride+1);
|
int block_w = b%((w-size)/stride+1);
|
for(p = 0; p < pixels; ++p){
|
int ph, pw, pc;
|
int position = p%(size*size);
|
pc = p/(size*size);
|
ph = position/size+block_h;
|
pw = position%size+block_w;
|
matrix[b+p*blocks] = image[pc*h*w+ph*w+pw];
|
}
|
}
|
}
|
|
//From Berkeley Vision's Caffe!
|
void im2col_cpu(double* data_im, const int channels,
|
const int height, const int width, const int ksize, const int stride,
|
double* data_col)
|
{
|
int c,h,w;
|
int height_col = (height - ksize) / stride + 1;
|
int width_col = (width - ksize) / stride + 1;
|
int channels_col = channels * ksize * ksize;
|
for ( c = 0; c < channels_col; ++c) {
|
int w_offset = c % ksize;
|
int h_offset = (c / ksize) % ksize;
|
int c_im = c / ksize / ksize;
|
for ( h = 0; h < height_col; ++h) {
|
for ( w = 0; w < width_col; ++w) {
|
data_col[(c * height_col + h) * width_col + w] =
|
data_im[(c_im * height + h * stride + h_offset) * width
|
+ w * stride + w_offset];
|
}
|
}
|
}
|
}
|
