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Merged encoder_wip into dev

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Michele 2022-03-03 12:13:14 +01:00
parent 6fc3e4b99c f5859040d8
commit 24a6260862
4 changed files with 245 additions and 0 deletions
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116
dataflow_neuro/primitives.act
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@ -507,6 +507,122 @@ namespace tmpl {
BUF_X1 reset_buf(.a=reset_B, .y=_reset_BX,.vdd=supply.vdd,.vss=supply.vss);
}
// A tree composed by arbiters. The first layer takes N signals
export template<pint N>
defproc arbiter_tree(a1of1 in[N]; a1of1 out; power supply)
{
bool tout;
{ N > 0 : "Invalid N, should be greater than 0" };
/* We calculate here how many arbiters we need to create for the full tree */
pint inputs_in_layer, end, elements_in_layer;
pint odd_element_idx = 0;
pint odd_element_flag = 0;
inputs_in_layer = 0;
end = N-1;
pint element_counter = 0;
// Here we start a for loop to count the elements in the tree
// The loop iterates for every successive layer
// i is the variable used to iterate the inputs,
// j counts the elements in the layer
*[ inputs_in_layer != end ->
elements_in_layer = 0; // At every layer the counter of the elements is resetted
*[ inputs_in_layer < end ->
[ inputs_in_layer + 1 >= end ->
//In this case, the number of input is even: the layer finishes
inputs_in_layer = end;
odd_element_flag = 0;
[] inputs_in_layer + 2 >= end ->
//In this case, we arrived at the last input, this means the inputs are odd
//We need to save the odd input index and move it to the next layer,
//up to when the resulting number is even
odd_element_idx = end;
odd_element_flag = 1;
inputs_in_layer = end;
[] else ->
//If we are not close to the end, analyzes the next two inputs
inputs_in_layer = inputs_in_layer +2;
]
elements_in_layer = elements_in_layer + 1; //At every step the elements count is updated
]
//Move the inputs_in_layer to the next layer
//Increase the end to account for the next layer elements
//If there was an odd element, count it also in the end
inputs_in_layer = end + 1;
end = end + elements_in_layer + odd_element_flag;
element_counter = element_counter + elements_in_layer;
]
{ element_counter = 4 : "Michele you did wrong" };
// Creating the elements of the tree
arbiter_handshake arb_array[element_counter];
(i:element_counter:arb_array[i].supply = supply;)
// These are the wires that connect one element of the tree to the others
a1of1 channels[element_counter*2];
//Connecting the first channels to the inputs
(i:N:channels[i] = in[i];)
channels[element_counter*2-1] = out;
//Now we redo the for loop but here to assign the channels to the elements
odd_element_idx = 0;
odd_element_flag = 0;
inputs_in_layer = 0;
end = N-1;
{ end=4 : "Michele you did wrong" };
// Here we start a for loop to count the elements in the tree
// The loop iterates for every successive layer
// i is the variable used to iterate the inputs,
// j counts the elements in the layer
*[ inputs_in_layer != end ->
elements_in_layer = 0; // At every layer the counter of the elements is resetted
*[ inputs_in_layer < end ->
[ inputs_in_layer + 1 >= end ->
//In this case, the number of input is even: the layer finishes
[ odd_element_flag >= 1 ->
arb_array[elements_in_layer].in1 = channels[inputs_in_layer];
arb_array[elements_in_layer].in2 = channels[odd_element_idx];
[] else ->
arb_array[elements_in_layer].in1 = channels[inputs_in_layer];
arb_array[elements_in_layer].in2 = channels[inputs_in_layer+1];
]
inputs_in_layer = end;
odd_element_flag = 0;
[] inputs_in_layer + 2 >= end ->
//In this case, we arrived at the last input, this means the inputs are odd
//We need to save the odd input index and move it to the next layer,
//up to when the resulting number is even
odd_element_idx = end;
odd_element_flag = 1;
{ end<8 : "Michele you did wrong" };
{ odd_element_idx=4 : "Michele you did wrong" };
arb_array[elements_in_layer].in1 = channels[inputs_in_layer];
arb_array[elements_in_layer].in2 = channels[inputs_in_layer+1];
inputs_in_layer = end;
[] else ->
//If we are not close to the end, analyzes the next two inputs
arb_array[elements_in_layer].in1 = channels[inputs_in_layer];
arb_array[elements_in_layer].in2 = channels[inputs_in_layer+1];
inputs_in_layer = inputs_in_layer +2;
]
elements_in_layer = elements_in_layer + 1; //At every step the elements count is updated
]
//Move the inputs_in_layer to the next layer
//Increase the end to account for the next layer elements
//If there was an odd element, count it also in the end
inputs_in_layer = end + 1;
end = end + elements_in_layer + odd_element_flag;
element_counter = element_counter + elements_in_layer;
]
}
export template<pint N>
defproc merge (avMx1of2<N> in1; avMx1of2<N> in2; avMx1of2<N> out ; bool? reset_B; power supply) {

3
test/unit_tests/arbiter_tree_test/run/test.prs Normal file
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@ -0,0 +1,3 @@
= "GND" "GND"
= "Vdd" "Vdd"
= "Reset" "Reset"

62
test/unit_tests/arbiter_tree_test/test.act Normal file
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@ -0,0 +1,62 @@
/*************************************************************************
*
* This file is part of ACT dataflow neuro library.
* It's the testing facility for cell_lib_std.act
*
* Copyright (c) 2022 University of Groningen - Ole Richter
* Copyright (c) 2022 University of Groningen - Hugh Greatorex
* Copyright (c) 2022 University of Groningen - Michele Mastella
* Copyright (c) 2022 University of Groningen - Madison Cotteret
*
* This source describes Open Hardware and is licensed under the CERN-OHL-W v2 or later
*
* You may redistribute and modify this documentation and make products
* using it under the terms of the CERN-OHL-W v2 (https:/cern.ch/cern-ohl).
* This documentation is distributed WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTY, INCLUDING OF MERCHANTABILITY, SATISFACTORY QUALITY
* AND FITNESS FOR A PARTICULAR PURPOSE. Please see the CERN-OHL-W v2
* for applicable conditions.
*
* Source location: https://git.web.rug.nl/bics/actlib_dataflow_neuro
*
* As per CERN-OHL-W v2 section 4.1, should You produce hardware based on
* these sources, You must maintain the Source Location visible in its
* documentation.
*
**************************************************************************
*/
import "../../dataflow_neuro/primitives.act";
import globals;
open tmpl::dataflow_neuro;
defproc arbiter_treee (a1of1 in[5]; a1of1 out)
{
a1of1 _in[5];
power _supply
_supply.vdd = Vdd;
_supply.vss = GND;
fifo_t<2> fifo_to_tree[5];
(i:5:
fifo_to_tree[i].in = in[i];
fifo_to_tree[i].out = _in[i];
fifo_to_tree.supply = _supply;
fifo_to_tree.reset_B = _reset_B;
)
arbiter_tree<5> at_cell(.in=_in, .out = out);
//Low active Reset
bool _reset_B;
prs {
Reset => _reset_B-
}
at_cell.supply = _supply;
}
arbiter_treee my_tree;

64
test/unit_tests/arbiter_tree_test/test.prsim Normal file
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@ -0,0 +1,64 @@
watchall
set Reset 1
set my_tree.in[0].r 0
set my_tree.in[1].r 0
set my_tree.in[2].r 0
set my_tree.in[3].r 0
set my_tree.in[4].r 0
set my_tree.out.a 0
cycle
assert my_tree.in[0].a 0
assert my_tree.in[1].a 0
assert my_tree.in[2].a 0
assert my_tree.in[3].a 0
assert my_tree.in[4].a 0
assert my_tree.out.r 0
system "echo '-------------------------------------------------'"
system "echo '[0] System initialized'"
set Reset 0
cycle
system "echo '-------------------------------------------------'"
system "echo '[1] System reset completed'"
set in[0].r 1
set in[2].r 1
set in[4].r 1
cycle
assert out.r 1
set out.a 1
cycle
assert out.r 0
set out.a 0
cycle
assert out.r 1
set out.a 1
cycle
assert out.r 0
set out.a 0
cycle
assert out.r 1
set out.a 1
cycle
assert out.r 0
set out.a 0
cycle
system "echo '-------------------------------------------------'"
system "echo '[3] Sent three inputs, received 3 outputs'"