mirror of https://github.com/openXC7/prjxray.git
56 lines
1.5 KiB
Python
56 lines
1.5 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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#
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# Copyright (C) 2017-2020 The Project X-Ray Authors.
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#
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# Use of this source code is governed by a ISC-style
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# license that can be found in the LICENSE file or at
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# https://opensource.org/licenses/ISC
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#
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# SPDX-License-Identifier: ISC
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class LutMaker(object):
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def __init__(self):
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self.input_lut_idx = 0
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self.output_lut_idx = 0
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self.lut_input_idx = 0
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def get_next_input_net(self):
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net = 'lut_{}_i[{}]'.format(self.input_lut_idx, self.lut_input_idx)
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self.lut_input_idx += 1
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if self.lut_input_idx > 5:
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self.lut_input_idx = 0
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self.input_lut_idx += 1
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return net
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def get_next_output_net(self):
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net = 'lut_{}_o'.format(self.output_lut_idx)
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self.output_lut_idx += 1
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return net
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def create_wires_and_luts(self):
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if self.output_lut_idx > self.input_lut_idx:
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nluts = self.output_lut_idx
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else:
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nluts = self.input_lut_idx
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if self.lut_input_idx > 0:
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nluts += 1
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for lut in range(nluts):
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yield """
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wire [5:0] lut_{lut}_i;
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wire lut_{lut}_o;
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(* KEEP, DONT_TOUCH *)
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LUT6 lut_{lut} (
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.I0(lut_{lut}_i[0]),
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.I1(lut_{lut}_i[1]),
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.I2(lut_{lut}_i[2]),
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.I3(lut_{lut}_i[3]),
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.I4(lut_{lut}_i[4]),
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.I5(lut_{lut}_i[5]),
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.O(lut_{lut}_o)
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);
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""".format(lut=lut)
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