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Commit 0ce9fcbb authored by Shucai Xiao's avatar Shucai Xiao
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finish implementation of lstm operator

parent 3f3f3534
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Showing with 112 additions and 12 deletions
src/rewrite_rnn.cpp
View file @ 0ce9fcbb
......@@ -777,9 +777,8 @@ void rewrite_rnn::apply_lstm(program& prog, instruction_ref ins) const
last_output = prog.insert_instruction(ins, op::squeeze{{0}}, concat_output);
// last cell output
auto concat_cell_output =
prog.insert_instruction(ins, op::concat{1}, ret_forward[2], ret_reverse[2]);
last_cell_output = prog.insert_instruction(ins, op::squeeze{{0}}, concat_cell_output);
last_cell_output =
prog.insert_instruction(ins, op::concat{0}, ret_forward[2], ret_reverse[2]);
// the following logic is to ensure the last instruction is a concat
if(ret_forward[0] == prog.end())
......@@ -853,7 +852,7 @@ void rewrite_rnn::apply_lstm(program& prog, instruction_ref ins) const
actv_funcs.at(2));
last_output = prog.insert_instruction(ins, op::squeeze{{0}}, ret[1]);
last_cell_output = prog.insert_instruction(ins, op::squeeze{{0}}, ret[2]);
last_cell_output = ret[2];
if(ret[0] == prog.end())
{
prog.replace_instruction(ins, op::concat{0}, ret[1]);
......@@ -961,19 +960,48 @@ std::vector<instruction_ref> rewrite_rnn::lstm_cell(bool is_forward,
auto sih = prog.insert_instruction(ins, op::squeeze{{0}}, ih);
// initial cell state
auto sic = prog.insert_instruction(ins, op::sequeeze{{0}}, ic);
auto sic = prog.insert_instruction(ins, op::squeeze{{0}}, ic);
auto ic_shape = sic->get_shape();
// bias
instruction_ref bi_brcst{};
instruction_ref bo_brcst{};
instruction_ref bf_brcst{};
instruction_ref bc_brcst{};
if (bias != prog.end())
{
auto sbias = prog.insert_instruction(ins, op::squeeze{{0}}, bias);
auto bxi = prog.insert_instruction(ins, op::slice{{0}, {0}, {hs}}, sbias);
auto bhi = prog.insert_instruction(ins, op::slice{{0}, {4*hs}, {5*hs}}, sbias);
auto bi = prog.insert_instruction(ins, op::add{}, bxi, bhi);
bi_brcst = prog.insert_instruction(ins, op::broadcast{1, ic_shape}, bi);
auto bxo = prog.insert_instruction(ins, op::slice{{0}, {hs}, {2*hs}}, sbias);
auto bho = prog.insert_instruction(ins, op::slice{{0}, {5*hs}, {6*hs}}, sbias);
auto bo = prog.insert_instruction(ins, op::add{}, bxo, bho);
bo_brcst = prog.insert_instruction(ins, op::broadcast{1, ic_shape}, bo);
auto bxf = prog.insert_instruction(ins, op::slice{{0}, {2*hs}, {3*hs}}, sbias);
auto bhf = prog.insert_instruction(ins, op::slice{{0}, {5*hs}, {6*hs}}, sbias);
auto bf = prog.insert_instruction(ins, op::add{}, bxf, bhf);
bf_brcst = prog.insert_instruction(ins, op::broadcast{1, ic_shape}, bf);
auto bxc = prog.insert_instruction(ins, op::slice{{0}, {3*hs}, {4*hs}}, sbias);
auto bhc = prog.insert_instruction(ins, op::slice{{0}, {7*hs}, {8*hs}}, sbias);
auto bc = prog.insert_instruction(ins, op::add{}, bxc, bhc);
bc_brcst = prog.insert_instruction(ins, op::broadcast{1, ic_shape}, bc);
}
// peep hole
auto spph = prog.insert_instruction(ins, op::squeeze{{0}}, pph);
pphi = prog.insert_instruction(ins, op::slice{{0}, {0}, {hs}}, spph);
pphi_bcst = prog.insert_instruction(ins, op::broadcast{1, ic_shape}, pphi);
auto pphi = prog.insert_instruction(ins, op::slice{{0}, {0}, {hs}}, spph);
auto pphi_brcst = prog.insert_instruction(ins, op::broadcast{1, ic_shape}, pphi);
ppho = prog.insert_instruction(ins, op::slice{{0}, {hs}, {2 * hs}}, spph);
ppho_bcst = prog.insert_instruction(ins, op::broadcast{1, ic_shape}, ppho);
auto ppho = prog.insert_instruction(ins, op::slice{{0}, {hs}, {2 * hs}}, spph);
auto ppho_brcst = prog.insert_instruction(ins, op::broadcast{1, ic_shape}, ppho);
pphf = prog.insert_instruction(ins, op::slice{{0}, {2 * hs}, {3 * hs}}, spph);
pphf_bcst = prog.insert_instruction(ins, op::broadcast{1, ic_shape}, pphf);
auto pphf = prog.insert_instruction(ins, op::slice{{0}, {2 * hs}, {3 * hs}}, spph);
auto pphf_brcst = prog.insert_instruction(ins, op::broadcast{1, ic_shape}, pphf);
for(long i = 0; i < seq_len; ++i)
{
......@@ -984,8 +1012,80 @@ std::vector<instruction_ref> rewrite_rnn::lstm_cell(bool is_forward,
// equation it = f(Xt*(Wi^T) + Ht-1*(Ri^T) + Pi (.) Ct-1 + Wbi + Rbi)
auto xt_wi = prog.insert_instruction(ins, op::dot{}, xt, tran_wi);
auto ht_ri = prog.insert_instruction(ins, op::dot{}, sih, tran_ri);
auto pphi_ct = prog.insert_instruction(ins, op::mul{}, pphi_bcst, sic);
auto pphi_ct = prog.insert_instruction(ins, op::mul{}, pphi_brcst, sic);
auto it_before_actv = prog.insert_instruction(ins, op::add{}, xt_wi, ht_ri, pphi_ct);
if (bias != prog.end())
{
it_before_actv = prog.insert_instruction(ins, op::add{}, it_before_actv, bi_brcst);
}
auto it = prog.insert_instruction(ins, actv_func1, it_before_actv);
// equation ft = f(Xt*(Wf^T) + Ht-1*(Rf^T) + Pf (.) Ct-1 + Wbf + Rbf)
auto xt_wf = prog.insert_instruction(ins, op::dot{}, xt, tran_wf);
auto ht_rf = prog.insert_instruction(ins, op::dot{}, sih, tran_rf);
auto pphf_ct = prog.insert_instruction(ins, op::mul{}, pphf_brcst, sic);
auto ft_before_actv = prog.insert_instruction(ins, op::add{}, xt_wf, ht_rf, pphf_ct);
if (bias != prog.end())
{
ft_before_actv = prog.insert_instruction(ins, op::add{}, ft_before_actv, bf_brcst);
}
auto ft = prog.insert_instruction(ins, actv_func1, ft_before_actv);
// equation ct = g(Xt*(Wc^T) + Ht-1*(Rc^T) + Wbc + Rbc)
auto xt_wc = prog.insert_instruction(ins, op::dot{}, xt, tran_wc);
auto ht_rc = prog.insert_instruction(ins, op::dot{}, sih, tran_rc);
auto ct_before_actv = prog.insert_instruction(ins, op::add{}, xt_wc, ht_rc);
if (bias != prog.end())
{
ct_before_actv = prog.insert_instruction(ins, op::add{}, ct_before_actv, bc_brcst);
}
auto ct = prog.insert_instruction(ins, actv_func2, ct_before_actv);
// equation Ct = ft (.) Ct-1 + it (.) ct
auto ft_cell = prog.insert_instruction(ins, op::mul{}, ft, sic);
auto it_ct = prog.insert_instruction(ins, op::mul{}, it, ct);
auto cellt = prog.insert_instruction(ins, op::add{}, ft_cell, it_ct);
last_cell_output = cellt;
// ot = f(Xt*(Wo^T) + Ht-1*(Ro^T) + Po (.) Ct + Wbo + Rbo)
auto xt_wo = prog.insert_instruction(ins, op::dot{}, xt, tran_wo);
auto ht_ro = prog.insert_instruction(ins, op::dot{}, sih, tran_ro);
auto ppho_cellt = prog.insert_instruction(ins, op::mul{}, ppho_brcst, cellt);
auto ot_before_actv = prog.insert_instruction(ins, op::add{}, xt_wo, ht_ro, ppho_cellt);
if (bias != prog.end())
{
ot_before_actv = prog.insert_instruction(ins, op::add{}, ot_before_actv, bo_brcst);
}
auto ot = prog.insert_instruction(ins, actv_func1, ot_before_actv);
// Ht = ot (.) h(Ct)
auto h_cellt = prog.insert_instruction(ins, actv_func3, cellt);
auto ht = prog.insert_instruction(ins, op::mul{}, ot, h_cellt);
sic = cellt;
sih = ht;
last_output = prog.insert_instruction(ins, op::unsqueeze{{0, 1}}, ht);
if (i < seq_len - 1)
{
if (i == 0)
{
hidden_states = last_output;
}
else
{
auto concat_arg0 = is_forward ? hidden_states : last_output;
auto concat_arg1 = is_forward ? last_output : hidden_states;
hidden_states = prog.insert_instruction(ins, op::concat{0}, concat_arg0, concat_arg1);
}
}
}
last_cell_output = prog.insert_instruction(ins, op::unsqueeze{{0}}, last_cell_output);
return {hidden_states, last_output, last_cell_output};
}
std::vector<operation> rewrite_rnn::lstm_actv_funcs(instruction_ref ins) const
......
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