1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
|
/*
* yosys -- Yosys Open SYnthesis Suite
*
* Copyright (C) 2012 Clifford Wolf <clifford@clifford.at>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#include "kernel/register.h"
#include "kernel/log.h"
#include <stdlib.h>
#include <stdio.h>
USING_YOSYS_NAMESPACE
PRIVATE_NAMESPACE_BEGIN
struct OptPass : public Pass {
OptPass() : Pass("opt", "perform simple optimizations") { }
virtual void help()
{
// |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
log("\n");
log(" opt [options] [selection]\n");
log("\n");
log("This pass calls all the other opt_* passes in a useful order. This performs\n");
log("a series of trivial optimizations and cleanups. This pass executes the other\n");
log("passes in the following order:\n");
log("\n");
log(" opt_const [-mux_undef] [-mux_bool] [-undriven] [-clkinv] [-fine] [-full] [-keepdc]\n");
log(" opt_share [-share_all] -nomux\n");
log("\n");
log(" do\n");
log(" opt_muxtree\n");
log(" opt_reduce [-fine] [-full]\n");
log(" opt_share [-share_all]\n");
log(" opt_rmdff\n");
log(" opt_clean [-purge]\n");
log(" opt_const [-mux_undef] [-mux_bool] [-undriven] [-clkinv] [-fine] [-full] [-keepdc]\n");
log(" while <changed design>\n");
log("\n");
log("When called with -fast the following script is used instead:\n");
log("\n");
log(" do\n");
log(" opt_const [-mux_undef] [-mux_bool] [-undriven] [-clkinv] [-fine] [-full] [-keepdc]\n");
log(" opt_share [-share_all]\n");
log(" opt_rmdff\n");
log(" opt_clean [-purge]\n");
log(" while <changed design in opt_rmdff>\n");
log("\n");
log("Note: Options in square brackets (such as [-keepdc]) are passed through to\n");
log("the opt_* commands when given to 'opt'.\n");
log("\n");
log("\n");
}
virtual void execute(std::vector<std::string> args, RTLIL::Design *design)
{
std::string opt_clean_args;
std::string opt_const_args;
std::string opt_reduce_args;
std::string opt_share_args;
bool fast_mode = false;
log_header("Executing OPT pass (performing simple optimizations).\n");
log_push();
size_t argidx;
for (argidx = 1; argidx < args.size(); argidx++) {
if (args[argidx] == "-purge") {
opt_clean_args += " -purge";
continue;
}
if (args[argidx] == "-mux_undef") {
opt_const_args += " -mux_undef";
continue;
}
if (args[argidx] == "-mux_bool") {
opt_const_args += " -mux_bool";
continue;
}
if (args[argidx] == "-undriven") {
opt_const_args += " -undriven";
continue;
}
if (args[argidx] == "-clkinv") {
opt_const_args += " -clkinv";
continue;
}
if (args[argidx] == "-fine") {
opt_const_args += " -fine";
opt_reduce_args += " -fine";
continue;
}
if (args[argidx] == "-full") {
opt_const_args += " -full";
opt_reduce_args += " -full";
continue;
}
if (args[argidx] == "-keepdc") {
opt_const_args += " -keepdc";
continue;
}
if (args[argidx] == "-share_all") {
opt_share_args += " -share_all";
continue;
}
if (args[argidx] == "-fast") {
fast_mode = true;
continue;
}
break;
}
extra_args(args, argidx, design);
if (fast_mode)
{
while (1) {
Pass::call(design, "opt_const" + opt_const_args);
Pass::call(design, "opt_share" + opt_share_args);
design->scratchpad_unset("opt.did_something");
Pass::call(design, "opt_rmdff");
if (design->scratchpad_get_bool("opt.did_something") == false)
break;
Pass::call(design, "opt_clean" + opt_clean_args);
log_header("Rerunning OPT passes. (Removed registers in this run.)\n");
}
Pass::call(design, "opt_clean" + opt_clean_args);
}
else
{
Pass::call(design, "opt_const" + opt_const_args);
Pass::call(design, "opt_share -nomux" + opt_share_args);
while (1) {
design->scratchpad_unset("opt.did_something");
Pass::call(design, "opt_muxtree");
Pass::call(design, "opt_reduce" + opt_reduce_args);
Pass::call(design, "opt_share" + opt_share_args);
Pass::call(design, "opt_rmdff");
Pass::call(design, "opt_clean" + opt_clean_args);
Pass::call(design, "opt_const" + opt_const_args);
if (design->scratchpad_get_bool("opt.did_something") == false)
break;
log_header("Rerunning OPT passes. (Maybe there is more to do..)\n");
}
}
design->optimize();
design->sort();
design->check();
log_header(fast_mode ? "Finished fast OPT passes.\n" : "Finished OPT passes. (There is nothing left to do.)\n");
log_pop();
}
} OptPass;
PRIVATE_NAMESPACE_END
|
