spec/gclk.py

# Copyright 2020 Project U-Ray Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import numpy as np
import sys

bufgces = []
with open(sys.argv[1], "r") as tf:
    for line in tf:
        sl = line.strip().split(",")
        if len(sl) < 4:
            continue
        for site in sl[4:]:
            if ("BUFGCE" in site) and "HDIO" not in site and "DIV" not in site:
                bufgces.append((site.split(":")[0], sl[2]))

np.random.shuffle(bufgces)

print("module top(input i, output o);")
N = int(len(bufgces) * 0.08)
print("    wire [%d:0] r;" % N)
print("    assign r[0] = i;")
print("    assign o = r[%d];" % N)
for i in range(N):
    bg, tile = bufgces[i]
    print("(* LOC=\"%s\" *)" % bg)
    if "BUFGCTRL" in bg:
        print(
            "    BUFGCTRL bufg_%d (.I0(r[%d]), .I1(r[%d]), .S0(1'b1), .S1(1'b0), .CE0(1'b1), .O(r[%d]));"
            % (i, i, i, i + 1))
    elif "DIV" in bg:
        print(
            "    BUFGCE_DIV #(.BUFGCE_DIVIDE(3)) bufg_%d (.I(r[%d]), .CLR(0), .CE(1'b1), .O(r[%d]));"
            % (i, i, i + 1))
    else:
        print("    BUFGCE bufg_%d (.I(r[%d]), .CE(1'b1), .O(r[%d]));" %
              (i, i, i + 1))
print("endmodule")