cdef void seq2col(float* output, const float* X, int B, int I, int nW) nogil


cdef void backprop_seq2col(float* d_seqs,
        const float* d_cols, int B, int I, int nW) nogil


cdef void cpu_maxout(float* best__bo, int* which__bo,
        const float* cands__bop, int B, int O, int P) nogil


cdef void cpu_backprop_maxout(float* dX__bop,
        const float* dX__bo, const int* which__bo, int B, int O, int P) nogil


cdef void cpu_mean_pool(float* means__bo,
        const float* X__to, const int* lengths__b,
        int B, int T, int O) nogil


cdef void cpu_backprop_mean_pool(float* dX__to,
        const float* d_means__bo, const int* lengths__b,
        int B, int T, int O) nogil


cdef void cpu_max_pool(float* maxes__bo, int* which__bo,
        const float* X__to, const int* lengths__b,
        int B, int T, int O) nogil


cdef void cpu_backprop_max_pool(float* dX__to,
        const float* d_maxes__bo, const int* which__bo, const int* lengths__b,
        int B, int T, int O) nogil