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word2vec_inner.pxd
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word2vec_inner.pxd
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# cython: boundscheck=False
# cython: wraparound=False
# cython: cdivision=True
# cython: embedsignature=True
# coding: utf-8
#
# shared type definitions for word2vec_inner
# used by both word2vec_inner.pyx (automatically) and doc2vec_inner.pyx (by explicit cimport)
#
# Copyright (C) 2013 Radim Rehurek <me@radimrehurek.com>
# Licensed under the GNU LGPL v2.1 - http://www.gnu.org/licenses/lgpl.html
cimport numpy as np
cdef extern from "voidptr.h":
void* PyCObject_AsVoidPtr(object obj)
ctypedef np.float32_t REAL_t
# BLAS routine signatures
ctypedef void (*scopy_ptr) (const int *N, const float *X, const int *incX, float *Y, const int *incY) nogil
ctypedef void (*saxpy_ptr) (const int *N, const float *alpha, const float *X, const int *incX, float *Y, const int *incY) nogil
ctypedef float (*sdot_ptr) (const int *N, const float *X, const int *incX, const float *Y, const int *incY) nogil
ctypedef double (*dsdot_ptr) (const int *N, const float *X, const int *incX, const float *Y, const int *incY) nogil
ctypedef double (*snrm2_ptr) (const int *N, const float *X, const int *incX) nogil
ctypedef void (*sscal_ptr) (const int *N, const float *alpha, const float *X, const int *incX) nogil
cdef scopy_ptr scopy
cdef saxpy_ptr saxpy
cdef sdot_ptr sdot
cdef dsdot_ptr dsdot
cdef snrm2_ptr snrm2
cdef sscal_ptr sscal
# precalculated sigmoid table
DEF EXP_TABLE_SIZE = 1000
DEF MAX_EXP = 6
cdef REAL_t[EXP_TABLE_SIZE] EXP_TABLE
DEF MAX_SENTENCE_LEN = 10000
# function implementations swapped based on BLAS detected in word2vec_inner.pyx init()
ctypedef REAL_t (*our_dot_ptr) (const int *N, const float *X, const int *incX, const float *Y, const int *incY) nogil
ctypedef void (*our_saxpy_ptr) (const int *N, const float *alpha, const float *X, const int *incX, float *Y, const int *incY) nogil
cdef our_dot_ptr our_dot
cdef our_saxpy_ptr our_saxpy
cdef struct Word2VecConfig:
int hs, negative, sample, compute_loss, size, window, cbow_mean, workers
REAL_t running_training_loss, alpha
REAL_t *syn0
REAL_t *words_lockf
np.uint32_t words_lockf_len
REAL_t *work
REAL_t *neu1
int codelens[MAX_SENTENCE_LEN]
np.uint32_t indexes[MAX_SENTENCE_LEN]
np.uint32_t reduced_windows[MAX_SENTENCE_LEN]
int sentence_idx[MAX_SENTENCE_LEN + 1]
# For hierarchical softmax
REAL_t *syn1
np.uint32_t *points[MAX_SENTENCE_LEN]
np.uint8_t *codes[MAX_SENTENCE_LEN]
# For negative sampling
REAL_t *syn1neg
np.uint32_t *cum_table
unsigned long long cum_table_len
# for sampling (negative and frequent-word downsampling)
unsigned long long next_random
# for when fblas.sdot returns a double
cdef REAL_t our_dot_double(const int *N, const float *X, const int *incX, const float *Y, const int *incY) nogil
# for when fblas.sdot returns a float
cdef REAL_t our_dot_float(const int *N, const float *X, const int *incX, const float *Y, const int *incY) nogil
# for when no blas available
cdef REAL_t our_dot_noblas(const int *N, const float *X, const int *incX, const float *Y, const int *incY) nogil
cdef void our_saxpy_noblas(const int *N, const float *alpha, const float *X, const int *incX, float *Y, const int *incY) nogil
# to support random draws from negative-sampling cum_table
cdef unsigned long long bisect_left(np.uint32_t *a, unsigned long long x, unsigned long long lo, unsigned long long hi) nogil
cdef unsigned long long random_int32(unsigned long long *next_random) nogil
cdef void w2v_fast_sentence_sg_hs(
const np.uint32_t *word_point, const np.uint8_t *word_code, const int codelen,
REAL_t *syn0, REAL_t *syn1, const int size,
const np.uint32_t word2_index, const REAL_t alpha, REAL_t *work, REAL_t *words_lockf,
const np.uint32_t lockf_len, const int _compute_loss, REAL_t *_running_training_loss_param) nogil
cdef unsigned long long w2v_fast_sentence_sg_neg(
const int negative, np.uint32_t *cum_table, unsigned long long cum_table_len,
REAL_t *syn0, REAL_t *syn1neg, const int size, const np.uint32_t word_index,
const np.uint32_t word2_index, const REAL_t alpha, REAL_t *work,
unsigned long long next_random, REAL_t *words_lockf,
const np.uint32_t lockf_len, const int _compute_loss, REAL_t *_running_training_loss_param) nogil
cdef void w2v_fast_sentence_cbow_hs(
const np.uint32_t *word_point, const np.uint8_t *word_code, int codelens[MAX_SENTENCE_LEN],
REAL_t *neu1, REAL_t *syn0, REAL_t *syn1, const int size,
const np.uint32_t indexes[MAX_SENTENCE_LEN], const REAL_t alpha, REAL_t *work,
int i, int j, int k, int cbow_mean, REAL_t *words_lockf,
const np.uint32_t lockf_len, const int _compute_loss, REAL_t *_running_training_loss_param) nogil
cdef unsigned long long w2v_fast_sentence_cbow_neg(
const int negative, np.uint32_t *cum_table, unsigned long long cum_table_len, int codelens[MAX_SENTENCE_LEN],
REAL_t *neu1, REAL_t *syn0, REAL_t *syn1neg, const int size,
const np.uint32_t indexes[MAX_SENTENCE_LEN], const REAL_t alpha, REAL_t *work,
int i, int j, int k, int cbow_mean, unsigned long long next_random, REAL_t *words_lockf,
const np.uint32_t lockf_len, const int _compute_loss, REAL_t *_running_training_loss_param) nogil
cdef init_w2v_config(Word2VecConfig *c, model, alpha, compute_loss, _work, _neu1=*)