169 lines
3.9 KiB
Perl
Executable File
169 lines
3.9 KiB
Perl
Executable File
#! /usr/bin/perl -w
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# Copyright (C) 2013 Free Software Foundation, Inc.
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# This file is part of the GNU C Library.
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# The GNU C Library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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# The GNU C Library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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# You should have received a copy of the GNU Lesser General Public
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# License along with the GNU C Library; if not, see
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# <http://www.gnu.org/licenses/>.
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use strict;
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use warnings;
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# Generate a benchmark source file for a given input.
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if (@ARGV < 2) {
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die "Usage: bench.pl <function> [parameter types] [return type]"
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}
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my $arg;
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my $func = $ARGV[0];
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my @args;
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my $ret = "void";
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my $getret = "";
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my $retval = "";
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if (@ARGV >= 2) {
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@args = split(':', $ARGV[1]);
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}
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if (@ARGV == 3) {
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$ret = $ARGV[2];
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}
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my $decl = "extern $ret $func (";
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# Function has no arguments.
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if (@args == 0 || $args[0] eq "void") {
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print "$decl void);\n";
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print "#define CALL_BENCH_FUNC(i,j) $func();\n";
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print "#define NUM_VARIANTS (1)\n";
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print "#define NUM_SAMPLES(v) (1)\n";
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print "#define VARIANT(v) FUNCNAME \"()\"\n"
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}
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# The function has arguments, so parse them and populate the inputs.
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else {
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my $num = 0;
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my $bench_func = "#define CALL_BENCH_FUNC(v, i) $func (";
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my $struct =
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"struct _variants
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{
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const char *name;
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int count;
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struct args *in;
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};\n";
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my $arg_struct = "struct args {";
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foreach $arg (@args) {
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if ($num > 0) {
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$bench_func = "$bench_func,";
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$decl = "$decl,";
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}
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$arg_struct = "$arg_struct volatile $arg arg$num;";
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$bench_func = "$bench_func variants[v].in[i].arg$num";
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$decl = "$decl $arg";
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$num = $num + 1;
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}
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$arg_struct = $arg_struct . "};\n";
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$decl = $decl . ");\n";
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$bench_func = $bench_func . ");\n";
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# We create a hash of inputs for each variant of the test.
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my $variant = "";
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my @curvals;
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my %vals;
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open INPUTS, "<$func-inputs" or die $!;
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LINE:while (<INPUTS>) {
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chomp;
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# New variant.
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if (/^## (\w+): (\w+)/) {
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#We only identify Name for now.
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if ($1 ne "name") {
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next LINE;
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}
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# Save values in the last variant.
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my @copy = @curvals;
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$vals{$variant} = \@copy;
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# Prepare for the next.
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$variant=$2;
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undef @curvals;
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next LINE;
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}
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# Skip over comments.
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if (/^#/) {
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next LINE;
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}
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push (@curvals, $_);
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}
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$vals{$variant} = \@curvals;
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# Print the definitions and macros.
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print $decl;
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print $bench_func;
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print $arg_struct;
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print $struct;
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my $c = 0;
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my $key;
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# Print the input arrays.
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foreach $key (keys %vals) {
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my @arr = @{$vals{$key}};
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print "struct args in" . $c . "[" . @arr . "] = {\n";
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foreach (@arr) {
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print "{$_},\n";
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}
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print "};\n\n";
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$c += 1;
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}
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# The variants. Each variant then points to the appropriate input array we
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# defined above.
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print "struct _variants variants[" . (keys %vals) . "] = {\n";
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$c = 0;
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foreach $key (keys %vals) {
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print "{\"$func($key)\", " . @{$vals{$key}} . ", in$c},\n";
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$c += 1;
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}
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print "};\n\n";
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# Finally, print the last set of macros.
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print "#define NUM_VARIANTS $c\n";
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print "#define NUM_SAMPLES(i) (variants[i].count)\n";
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print "#define VARIANT(i) (variants[i].name)\n";
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}
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# In some cases not storing a return value seems to result in the function call
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# being optimized out.
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if ($ret ne "void") {
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print "static volatile $ret ret = 0.0;\n";
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$getret = "ret = ";
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}
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# And we're done.
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print "#define BENCH_FUNC(i, j) ({$getret CALL_BENCH_FUNC (i, j);})\n";
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print "#define FUNCNAME \"$func\"\n";
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print "#include \"bench-skeleton.c\"\n";
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