diff options
Diffstat (limited to 'matrix/generic/cukernel.cu')
| -rw-r--r-- | matrix/generic/cukernel.cu | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/matrix/generic/cukernel.cu b/matrix/generic/cukernel.cu index 4b6af61..2e794b7 100644 --- a/matrix/generic/cukernel.cu +++ b/matrix/generic/cukernel.cu @@ -105,6 +105,15 @@ __global__ void cudak_(block_reduce_rowmax)(const MATRIX_ELEM *input, output[blockIdx.x + ostride * blockIdx.y] = cudak_(arr)[0]; } +__global__ void cudak_(add_row)(const MATRIX_ELEM *a, MATRIX_ELEM *b, + int nrow, int ncol, int stride, double beta) { + int j = blockIdx.x * blockDim.x + threadIdx.x; + int i = blockIdx.y * blockDim.y + threadIdx.y; + if (i >= nrow || j >= ncol) return; + b[j + i * stride] += beta * a[j]; +} + + extern "C" { #include "../cukernel.h" void cudak_(cuda_sigmoid)(const Matrix *a, Matrix *b) { @@ -222,5 +231,16 @@ extern "C" { ncol); cudaFree(res); } + + /* in-place calc */ + void cudak_(cuda_add_row)(const Matrix *a, Matrix *b, double beta) { + dim3 threadsPerBlock(CUDA_THREADS_N, + CUDA_THREADS_N); + dim3 numBlocks(CEIL_DIV(b->ncol, threadsPerBlock.x), + CEIL_DIV(b->nrow, threadsPerBlock.y)); + cudak_(add_row)<<<numBlocks, threadsPerBlock>>> \ + (MATRIX_ELEM_PTR(a), MATRIX_ELEM_PTR(b), b->nrow, b->ncol, + b->stride / sizeof(MATRIX_ELEM), beta); + } } #endif |