benchtests: Move bench.py to benchtests/scripts/

It makes much more sense to have all benchmarking-related scripts in a
single place away from everything else.

1 files changed, 0 insertions, 299 deletions

diff --git a/scripts/bench.py b/scripts/bench.py
deleted file mode 100755
index e500a33..0000000
--- 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:]))