mirror of https://github.com/openXC7/prjxray.git
105 lines
2.4 KiB
Python
105 lines
2.4 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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import os
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import random
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import itertools
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from prjxray import util
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from prjxray.db import Database
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random.seed(int(os.getenv("SEED"), 16))
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def gen_sites(lr):
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db = Database(util.get_db_root(), util.get_part())
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grid = db.grid()
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for tile_name in grid.tiles():
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loc = grid.loc_of_tilename(tile_name)
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gridinfo = grid.gridinfo_at_loc(loc)
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if gridinfo.tile_type[-1] != lr:
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continue
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sites = []
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for site_name, site_type in gridinfo.sites.items():
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if site_type in ['SLICEL', 'SLICEM']:
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sites.append(site_name)
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if not sites:
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continue
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print('// ', gridinfo.tile_type)
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yield sorted(sites)
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def yield_bits(bits, nvals):
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for i in range(nvals):
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mask = (1 << i)
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yield int(bool(bits & mask))
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NUM_IMUX_INPUTS = 2 * 6 * 4
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NUM_TILES = 20
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def emit_luts(choices, spec_idx, lr):
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for idx, sites in enumerate(itertools.islice(gen_sites(lr), 0, NUM_TILES)):
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cidx = idx + spec_idx * NUM_TILES
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if cidx < len(choices):
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bits = choices[cidx]
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else:
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bits = random.randint(0, 2**NUM_IMUX_INPUTS - 1)
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itr = yield_bits(bits, nvals=NUM_IMUX_INPUTS)
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for site in sites:
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for lut in range(4):
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print(
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'''
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(* KEEP, DONT_TOUCH, LOC = "{site}" *)
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LUT6 {site}_lut{lut} (
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.I0({I0}),
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.I1({I1}),
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.I2({I2}),
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.I3({I3}),
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.I4({I4}),
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.I5({I5})
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);'''.format(
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site=site,
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lut=lut,
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I0=next(itr),
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I1=next(itr),
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I2=next(itr),
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I3=next(itr),
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I4=next(itr),
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I5=next(itr),
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))
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def run():
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print('''
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module top();
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''')
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choices = util.gen_fuzz_choices(nvals=NUM_IMUX_INPUTS)
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spec_idx = util.specn() - 1
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emit_luts(choices, spec_idx, 'L')
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emit_luts(choices, spec_idx, 'R')
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print("endmodule")
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if __name__ == '__main__':
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run()
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