diff options
author | txh18 <[email protected]> | 2015-10-27 16:24:55 +0800 |
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committer | txh18 <[email protected]> | 2015-10-27 16:24:55 +0800 |
commit | 7c95640c95f1cc1d84b4d49fa97fd922748b88a7 (patch) | |
tree | e78fc611b8768ddf6e9191d597bf667e83b3353b /nerv/lib/matrix/generic/cukernel.cu | |
parent | ba8a1c9d5366c22b0b631f26ae1de7c5da2cbaeb (diff) |
added update_select_rows for select_linear:update speed-up
Diffstat (limited to 'nerv/lib/matrix/generic/cukernel.cu')
-rw-r--r-- | nerv/lib/matrix/generic/cukernel.cu | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/nerv/lib/matrix/generic/cukernel.cu b/nerv/lib/matrix/generic/cukernel.cu index 08feb59..6c8e64a 100644 --- a/nerv/lib/matrix/generic/cukernel.cu +++ b/nerv/lib/matrix/generic/cukernel.cu @@ -225,6 +225,15 @@ __global__ void cudak_(clip)(MATRIX_ELEM *a, a[j + i * stride] = val_1; } +__global__ void cudak_(update_select_rows)(MATRIX_ELEM *c, const MATRIX_ELEM *a, const MATRIX_ELEM *idx, + int nrow_a, int ncol_a, int stride_c, int stride_a, double alpha, double beta) { + int j = blockIdx.x * blockDim.x + threadIdx.x; + int i = blockIdx.y * blockDim.y + threadIdx.y; + if (i >= nrow_a || j >= ncol_a) return; + int i_c = lrintf(idx[i]); + c[j + i_c * stride_c] = c[j + i_c * stride_c] * (1 - beta * alpha) + a[j + i * stride_a] * alpha; +} + __global__ void cudak_(expand_frm)(const MATRIX_ELEM *a, MATRIX_ELEM *b, int nrow, int ncol, int enrow, int encol, @@ -540,6 +549,17 @@ extern "C" { a->stride / sizeof(MATRIX_ELEM), val_1, val_2); cudaStreamSynchronize(0); } + + void cudak_(cuda_update_select_rows)(Matrix *c, const Matrix *a, const Matrix *idx, double alpha, double beta) { + dim3 threadsPerBlock(CUDA_THREADS_N, CUDA_THREADS_N); + dim3 numBlocks(CEIL_DIV(a->ncol, threadsPerBlock.x), + CEIL_DIV(a->nrow, threadsPerBlock.y)); + cudak_(update_select_rows)<<<numBlocks, threadsPerBlock>>> \ + (MATRIX_ELEM_PTR(c), MATRIX_ELEM_PTR(a), MATRIX_ELEM_PTR(idx), + a->nrow, a->ncol, c->stride / sizeof(MATRIX_ELEM), + a->stride / sizeof(MATRIX_ELEM), alpha, beta); + cudaStreamSynchronize(0); + } void cudak_(cuda_expand_frm)(const Matrix *a, Matrix *b, int context) { dim3 threadsPerBlock(CUDA_THREADS_N, CUDA_THREADS_N); |