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
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
|
#! /usr/bin/perl -w
# Copyright (C) 2013-2014 Free Software Foundation, Inc.
# This file is part of the GNU C Library.
# The GNU C Library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
# The GNU C Library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
# You should have received a copy of the GNU Lesser General Public
# License along with the GNU C Library; if not, see
# <http://www.gnu.org/licenses/>.
use strict;
use warnings;
# Generate a benchmark source file for a given input.
if (@ARGV < 1) {
die "Usage: bench.pl <function>"
}
my $func = $ARGV[0];
my @args;
my $ret = "void";
my $getret = "";
# We create a hash of inputs for each variant of the test.
my $variant = "";
my @curvals;
my %vals;
my @include_headers;
my @include_sources;
my $incl;
open INPUTS, "<$func-inputs" or die $!;
LINE:while (<INPUTS>) {
chomp;
# Directives.
if (/^## ([\w-]+): (.*)/) {
# Function argument types.
if ($1 eq "args") {
@args = split(":", $2);
}
# Function return type.
elsif ($1 eq "ret") {
$ret = $2;
}
elsif ($1 eq "includes") {
@include_headers = split (",", $2);
}
elsif ($1 eq "include-sources") {
@include_sources = split (",", $2);
}
# New variant. This is the only directive allowed in the body of the
# inputs to separate inputs into variants. All others should be at the
# top or else all hell will break loose.
elsif ($1 eq "name") {
# Save values in the previous variant.
my @copy = @curvals;
$vals{$variant} = \@copy;
# Prepare for the next.
$variant=$2;
undef @curvals;
next LINE;
}
else {
die "Unknown directive: ".$1;
}
}
# Skip over comments and blank lines.
if (/^#/ || /^$/) {
next LINE;
}
push (@curvals, $_);
}
my $bench_func = "#define CALL_BENCH_FUNC(v, i) $func (";
# Output variables. These include the return value as well as any pointers
# that may get passed into the function, denoted by the <> around the type.
my $outvars = "";
if ($ret ne "void") {
$outvars = "static $ret volatile ret;\n";
}
# Print the definitions and macros.
foreach $incl (@include_headers) {
print "#include <" . $incl . ">\n";
}
# Print the source files.
foreach $incl (@include_sources) {
print "#include \"" . $incl . "\"\n";
}
if (@args > 0) {
# Save values in the last variant.
$vals{$variant} = \@curvals;
my $struct =
"struct _variants
{
const char *name;
int count;
struct args *in;
};\n";
my $arg_struct = "struct args {";
my $num = 0;
my $arg;
foreach $arg (@args) {
if ($num > 0) {
$bench_func = "$bench_func,";
}
$_ = $arg;
if (/<(.*)\*>/) {
# Output variables. These have to be pointers, so dereference once by
# dropping one *.
$outvars = $outvars . "static $1 out$num;\n";
$bench_func = "$bench_func &out$num";
}
else {
$arg_struct = "$arg_struct $arg volatile arg$num;";
$bench_func = "$bench_func variants[v].in[i].arg$num";
}
$num = $num + 1;
}
$arg_struct = $arg_struct . "};\n";
$bench_func = $bench_func . ");\n";
print $bench_func;
print $arg_struct;
print $struct;
my $c = 0;
my $key;
# Print the input arrays.
foreach $key (keys %vals) {
my @arr = @{$vals{$key}};
print "struct args in" . $c . "[" . @arr . "] = {\n";
foreach (@arr) {
print "{$_},\n";
}
print "};\n\n";
$c += 1;
}
# The variants. Each variant then points to the appropriate input array we
# defined above.
print "struct _variants variants[" . (keys %vals) . "] = {\n";
$c = 0;
foreach $key (keys %vals) {
print "{\"$func($key)\", " . @{$vals{$key}} . ", in$c},\n";
$c += 1;
}
print "};\n\n";
# Finally, print the last set of macros.
print "#define NUM_VARIANTS $c\n";
print "#define NUM_SAMPLES(i) (variants[i].count)\n";
print "#define VARIANT(i) (variants[i].name)\n";
}
else {
print $bench_func . ");\n";
print "#define NUM_VARIANTS (1)\n";
print "#define NUM_SAMPLES(v) (1)\n";
print "#define VARIANT(v) FUNCNAME \"()\"\n"
}
# Print the output variable definitions.
print "$outvars\n";
# In some cases not storing a return value seems to result in the function call
# being optimized out.
if ($ret ne "void") {
$getret = "ret = ";
}
# And we're done.
print "#define BENCH_FUNC(i, j) ({$getret CALL_BENCH_FUNC (i, j);})\n";
print "#define FUNCNAME \"$func\"\n";
print "#include \"bench-skeleton.c\"\n";
|
