75 lines
1.8 KiB
Plaintext
75 lines
1.8 KiB
Plaintext
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#!/usr/bin/perl
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# SPDX-License-Identifier: Apache-2.0
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# Copyright 2020 Western Digital Corporation or its affiliates.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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use Getopt::Long;
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use integer;
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$helpusage = "placeholder";
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GetOptions ('total_int=s' => \$total_int)|| die("$helpusage");
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$LEN=15;
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#printf("logic [2:0] mask;\n");
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printf("// mask[3:0] = { 4'b1000 - 30b mask,4'b0100 - 31b mask, 4'b0010 - 28b mask, 4'b0001 - 32b mask }\n");
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printf("always_comb begin\n");
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printf(" case \(address[14:0]\)\n");
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printf(" 15'b011000000000000 : mask[3:0] = 4'b0100;\n");
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for ($i=1; $i<=$total_int; $i++) {
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$j=hex("4000");
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printf(" 15'b%s : mask[3:0] = 4'b1000;\n",d2b($j+$i*4));
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}
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for ($i=1; $i<=$total_int; $i++) {
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$j=hex("2000");
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printf(" 15'b%s : mask[3:0] = 4'b0100;\n",d2b($j+$i*4));
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}
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for ($i=1; $i<=$total_int; $i++) {
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$j=hex("0");
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printf(" 15'b%s : mask[3:0] = 4'b0010;\n",d2b($j+$i*4));
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}
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printf(" %-17s : mask[3:0] = 4'b0001;\n","default");
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printf(" endcase\n");
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printf("end\n");
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sub b2d {
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my ($v) = @_;
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$v = oct("0b" . $v);
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return($v);
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}
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sub d2b {
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my ($v) = @_;
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my $repeat;
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$v = sprintf "%b",$v;
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if (length($v)<$LEN) {
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$repeat=$LEN-length($v);
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$v="0"x$repeat.$v;
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}
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elsif (length($v)>$LEN) {
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$v=substr($v,length($v)-$LEN,$LEN);
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}
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return($v);
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}
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