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Copy pathshift_mult_array_init_xblock.m
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192 lines (165 loc) · 6.69 KB
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% Center for Astronomy Signal Processing and Electronics Research %
% http://casper.berkeley.edu %
% Copyright (C) 2011 Hong Chen %
% %
% This program is free software; you can redistribute it and/or modify %
% it under the terms of the GNU General Public License as published by %
% the Free Software Foundation; either version 2 of the License, or %
% (at your option) any later version. %
% %
% This program is distributed in the hope that it will be useful, %
% but WITHOUT ANY WARRANTY; without even the implied warranty of %
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the %
% GNU General Public License for more details. %
% %
% You should have received a copy of the GNU General Public License along %
% with this program; if not, write to the Free Software Foundation, Inc., %
% 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
function shift_mult_array_init_xblock(const_array, add_latency,n_bits,bin_pt)
len = length(const_array);
inport = xInport('in');
outport = cell(1,len);
for i =1:len
outport{i} = xOutport(['out',num2str(i)]);
end
sync = xInport('sync');
sync_out = xOutport('sync_out');
const_bin_array = cell(1,len);
max_num_bits = 0; % maximum length of binary string
num_bits = cell(1,len);
for i=1:len
const_bin_array{i} = dec2bin(const_array(i));
num_bits{i} = length(const_bin_array{i});
if num_bits{i}> max_num_bits
max_num_bits = num_bits{i};
end
end
combined_bin = zeros(1,max_num_bits);
for i =1:max_num_bits
for j = 1:len
if combined_bin(1,i) == 1
continue
end
temp_string = const_bin_array{j};
temp_length = length(temp_string);
if (temp_length-i+1)>0
if strcmp(temp_string(temp_length-i+1),'1')
combined_bin(1,i) = 1;
end
end
[i,j]
temp_string
combined_bin
end
end
combined_bin
all_shifts = cell(1,max_num_bits);
all_shift_out = cell(1,max_num_bits);
for i =1:max_num_bits
all_shift_out{i} = xSignal(['shift_out',num2str(i)]);
if combined_bin(i) ==1 && i>1
all_shifts{i} = xBlock(struct('source','Shift','name', ['shift',num2str(i)]), ...
struct('shift_dir', 'Left', ...
'shift_bits', i-1, ...
'latency', 0, ...
'Precision','User Defined', ...
'arith_type', 'Signed (2''s comp)', ...
'n_bits', n_bits+(i-1), ...
'bin_pt', bin_pt), ...
{inport}, ...
{all_shift_out{i}});
else
all_shift_out{i}.bind(inport);
end
end
adder_trees_inputs = cell(1,len);
adder_trees_out = cell(1,len);
delays_amount = cell(1,len);
xlsub3_addertree = cell(1,len);
zero_established = 0;
max_delay = 0;
outs = cell(1,len);
replicated = zeros(1,len);
for i =1:len
outs{i} = xSignal(['out',num2str(i)]);
adder_trees_out{i} = xSignal(['adder_trees_out',num2str(i)]);
temp_len = length(find(const_bin_array{i} == '1'));
delays_amount{i} = ceil(log2(temp_len))*add_latency;
if delays_amount{i} > max_delay
max_delay = delays_amount{i};
end
% replication check
temp_const_array = const_array(1:i-1);
rep_check = find(temp_const_array == const_array(i));
if rep_check
replicated(1,i) = 1;
outs{i}=outs{rep_check(1)};
continue;
end
if const_array(i) == 0
if zero_established
adder_trees_out{i}.bind(zero_out);
else
zero_out = xSignal('zero_out');
zero_established = 1;
xlsub3_zero = xBlock(struct('source', 'Constant','name','zero'), ...
struct('arith_type', 'signed', ...
'const', 0, ...
'n_bits', n_bits, ...
'bin_pt', bin_pt), ...
{}, ...
{zero_out});
adder_trees_out{i}.bind(zero_out);
end
continue;
end
adder_trees_inputs{i} = cell(1,temp_len);
temp_array = const_bin_array{i};
temp_array
temp_len
if temp_len ==1
ind = find(temp_array == '1');
adder_trees_out{i}.bind(all_shift_out{num_bits{i}-ind+1});
continue;
end
k = 1;
for j = 1:num_bits{i}
if strcmp(temp_array(num_bits{i}-j+1),'1')
adder_trees_inputs{i}{k} = all_shift_out{j};
k = k+1;
end
end
adder_trees_inputs{i}
xlsub3_addertree{i} = xBlock(struct('source', str2func('adder_tree_init_xblock'),'name', ['adder_tree',num2str(i)]), ...
{temp_len, add_latency, 'Round (unbiased: +/- Inf)', 'Saturate', 'Behavioral'}, ...
[{inport},adder_trees_inputs{i}], ...
{{},adder_trees_out{i}});
end
% add delay blocks and connect to outports
xlsub3_delays = cell(1,len);
for i = 1:len
if replicated(1,i)
continue;
end
if delays_amount{i} < max_delay
xlsub3_delays{i} = xBlock(struct('source','Delay','name',['delay',num2str(i)]), ...
struct('latency', max_delay - delays_amount{i}), ...
{adder_trees_out{i}}, ...
{outs{i}});
else
outs{i}.bind(adder_trees_out{i});
end
end
for i =1:len
outport{i}.bind(outs{i});
end
% take care of sync
sync_delay = xBlock(struct('source','Delay','name','sync_delay'), ...
struct('latency', max_delay), ...
{sync}, ...
{sync_out});
end