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
|
#! /usr/bin/perl -w
# Copyright (C) 2013 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 < 2) {
die "Usage: bench.pl <function> [parameter types] [return type]"
}
my $arg;
my $func = $ARGV[0];
my @args;
my $ret = "void";
my $getret = "";
my $retval = "";
if (@ARGV >= 2) {
@args = split(':', $ARGV[1]);
}
if (@ARGV == 3) {
$ret = $ARGV[2];
}
my $decl = "extern $ret $func (";
# Function has no arguments.
if (@args == 0 || $args[0] eq "void") {
print "$decl void);\n";
print "#define CALL_BENCH_FUNC(i,j) $func();\n";
print "#define NUM_VARIANTS (1)\n";
print "#define NUM_SAMPLES(v) (1)\n";
print "#define VARIANT(v) FUNCNAME \"()\"\n"
}
# The function has arguments, so parse them and populate the inputs.
else {
my $num = 0;
my $bench_func = "#define CALL_BENCH_FUNC(v, i) $func (";
my $struct =
"struct _variants
{
const char *name;
int count;
struct args *in;
};\n";
my $arg_struct = "struct args {";
foreach $arg (@args) {
if ($num > 0) {
$bench_func = "$bench_func,";
$decl = "$decl,";
}
$arg_struct = "$arg_struct volatile $arg arg$num;";
$bench_func = "$bench_func variants[v].in[i].arg$num";
$decl = "$decl $arg";
$num = $num + 1;
}
$arg_struct = $arg_struct . "};\n";
$decl = $decl . ");\n";
$bench_func = $bench_func . ");\n";
# We create a hash of inputs for each variant of the test.
my $variant = "";
my @curvals;
my %vals;
open INPUTS, "<$func-inputs" or die $!;
LINE:while (<INPUTS>) {
chomp;
# New variant.
if (/^## (\w+): (\w+)/) {
#We only identify Name for now.
if ($1 ne "name") {
next LINE;
}
# Save values in the last variant.
my @copy = @curvals;
$vals{$variant} = \@copy;
# Prepare for the next.
$variant=$2;
undef @curvals;
next LINE;
}
# Skip over comments.
if (/^#/) {
next LINE;
}
push (@curvals, $_);
}
$vals{$variant} = \@curvals;
# Print the definitions and macros.
print $decl;
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 $c\n";
print "#define NUM_SAMPLES(i) (variants[i].count)\n";
print "#define VARIANT(i) (variants[i].name)\n";
}
# In some cases not storing a return value seems to result in the function call
# being optimized out.
if ($ret ne "void") {
print "static volatile $ret ret = 0.0;\n";
$getret = "ret = ";
}
# And we're done.
print "#define BENCH_FUNC(i, j) ({$getret CALL_BENCH_FUNC (i, j);})\n";
print "#define FUNCNAME \"$func\"\n";
print "#include \"bench-skeleton.c\"\n";
|
