diff options
Diffstat (limited to 'scripts')
| -rwxr-xr-x | scripts/bench.py | 299 |
1 files changed, 0 insertions, 299 deletions
diff --git a/scripts/bench.py b/scripts/bench.py deleted file mode 100755 index e500a33ce7..0000000000 --- a/scripts/bench.py +++ /dev/null @@ -1,299 +0,0 @@ -#!/usr/bin/python -# Copyright (C) 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/>. - -"""Benchmark program generator script - -This script takes a function name as input and generates a program using -an input file located in the benchtests directory. The name of the -input file should be of the form foo-inputs where 'foo' is the name of -the function. -""" - -from __future__ import print_function -import sys -import os -import itertools - -# Macro definitions for functions that take no arguments. For functions -# that take arguments, the STRUCT_TEMPLATE, ARGS_TEMPLATE and -# VARIANTS_TEMPLATE are used instead. -DEFINES_TEMPLATE = ''' -#define CALL_BENCH_FUNC(v, i) %(func)s () -#define NUM_VARIANTS (1) -#define NUM_SAMPLES(v) (1) -#define VARIANT(v) FUNCNAME "()" -''' - -# Structures to store arguments for the function call. A function may -# have its inputs partitioned to represent distinct performance -# characteristics or distinct flavors of the function. Each such -# variant is represented by the _VARIANT structure. The ARGS structure -# represents a single set of arguments. -STRUCT_TEMPLATE = ''' -#define CALL_BENCH_FUNC(v, i) %(func)s (%(func_args)s) - -struct args -{ -%(args)s -}; - -struct _variants -{ - const char *name; - int count; - struct args *in; -}; -''' - -# The actual input arguments. -ARGS_TEMPLATE = ''' -struct args in%(argnum)d[%(num_args)d] = { -%(args)s -}; -''' - -# The actual variants, along with macros defined to access the variants. -VARIANTS_TEMPLATE = ''' -struct _variants variants[%(num_variants)d] = { -%(variants)s -}; - -#define NUM_VARIANTS %(num_variants)d -#define NUM_SAMPLES(i) (variants[i].count) -#define VARIANT(i) (variants[i].name) -''' - -# Epilogue for the generated source file. -EPILOGUE = ''' -#define BENCH_FUNC(i, j) ({%(getret)s CALL_BENCH_FUNC (i, j);}) -#define FUNCNAME "%(func)s" -#include "bench-skeleton.c"''' - - -def gen_source(func, directives, all_vals): - """Generate source for the function - - Generate the C source for the function from the values and - directives. - - Args: - func: The function name - directives: A dictionary of directives applicable to this function - all_vals: A dictionary input values - """ - # The includes go in first. - for header in directives['includes']: - print('#include <%s>' % header) - - for header in directives['include-sources']: - print('#include "%s"' % header) - - # Print macros. This branches out to a separate routine if - # the function takes arguments. - if not directives['args']: - print(DEFINES_TEMPLATE % {'func': func}) - outargs = [] - else: - outargs = _print_arg_data(func, directives, all_vals) - - # Print the output variable definitions if necessary. - for out in outargs: - print(out) - - # If we have a return value from the function, make sure it is - # assigned to prevent the compiler from optimizing out the - # call. - if directives['ret']: - print('static %s volatile ret;' % directives['ret']) - getret = 'ret = ' - else: - getret = '' - - print(EPILOGUE % {'getret': getret, 'func': func}) - - -def _print_arg_data(func, directives, all_vals): - """Print argument data - - This is a helper function for gen_source that prints structure and - values for arguments and their variants and returns output arguments - if any are found. - - Args: - func: Function name - directives: A dictionary of directives applicable to this function - all_vals: A dictionary input values - - Returns: - Returns a list of definitions for function arguments that act as - output parameters. - """ - # First, all of the definitions. We process writing of - # CALL_BENCH_FUNC, struct args and also the output arguments - # together in a single traversal of the arguments list. - func_args = [] - arg_struct = [] - outargs = [] - - for arg, i in zip(directives['args'], itertools.count()): - if arg[0] == '<' and arg[-1] == '>': - pos = arg.rfind('*') - if pos == -1: - die('Output argument must be a pointer type') - - outargs.append('static %s out%d;' % (arg[1:pos], i)) - func_args.append(' &out%d' % i) - else: - arg_struct.append(' %s volatile arg%d;' % (arg, i)) - func_args.append('variants[v].in[i].arg%d' % i) - - print(STRUCT_TEMPLATE % {'args' : '\n'.join(arg_struct), 'func': func, - 'func_args': ', '.join(func_args)}) - - # Now print the values. - variants = [] - for (k, vals), i in zip(all_vals.items(), itertools.count()): - out = [' {%s},' % v for v in vals] - - # Members for the variants structure list that we will - # print later. - variants.append(' {"%s(%s)", %d, in%d},' % (func, k, len(vals), i)) - print(ARGS_TEMPLATE % {'argnum': i, 'num_args': len(vals), - 'args': '\n'.join(out)}) - - # Print the variants and the last set of macros. - print(VARIANTS_TEMPLATE % {'num_variants': len(all_vals), - 'variants': '\n'.join(variants)}) - return outargs - - -def _process_directive(d_name, d_val): - """Process a directive. - - Evaluate the directive name and value passed and return the - processed value. This is a helper function for parse_file. - - Args: - d_name: Name of the directive - d_val: The string value to process - - Returns: - The processed value, which may be the string as it is or an object - that describes the directive. - """ - # Process the directive values if necessary. name and ret don't - # need any processing. - if d_name.startswith('include'): - d_val = d_val.split(',') - elif d_name == 'args': - d_val = d_val.split(':') - - # Return the values. - return d_val - - -def parse_file(func): - """Parse an input file - - Given a function name, open and parse an input file for the function - and get the necessary parameters for the generated code and the list - of inputs. - - Args: - func: The function name - - Returns: - A tuple of two elements, one a dictionary of directives and the - other a dictionary of all input values. - """ - all_vals = {} - # Valid directives. - directives = { - 'name': '', - 'args': [], - 'includes': [], - 'include-sources': [], - 'ret': '' - } - - try: - with open('%s-inputs' % func) as f: - for line in f: - # Look for directives and parse it if found. - if line.startswith('##'): - try: - d_name, d_val = line[2:].split(':', 1) - d_name = d_name.strip() - d_val = d_val.strip() - directives[d_name] = _process_directive(d_name, d_val) - except (IndexError, KeyError): - die('Invalid directive: %s' % line[2:]) - - # Skip blank lines and comments. - line = line.split('#', 1)[0].rstrip() - if not line: - continue - - # Otherwise, we're an input. Add to the appropriate - # input set. - cur_name = directives['name'] - all_vals.setdefault(cur_name, []) - all_vals[cur_name].append(line) - except IOError as ex: - die("Failed to open input file (%s): %s" % (ex.filename, ex.strerror)) - - return directives, all_vals - - -def die(msg): - """Exit with an error - - Prints an error message to the standard error stream and exits with - a non-zero status. - - Args: - msg: The error message to print to standard error - """ - print('%s\n' % msg, file=sys.stderr) - sys.exit(os.EX_DATAERR) - - -def main(args): - """Main function - - Use the first command line argument as function name and parse its - input file to generate C source that calls the function repeatedly - for the input. - - Args: - args: The command line arguments with the program name dropped - - Returns: - os.EX_USAGE on error and os.EX_OK on success. - """ - if len(args) != 1: - print('Usage: %s <function>' % sys.argv[0]) - return os.EX_USAGE - - directives, all_vals = parse_file(args[0]) - gen_source(args[0], directives, all_vals) - return os.EX_OK - - -if __name__ == '__main__': - sys.exit(main(sys.argv[1:])) |