* hash.c (DEFAULT_SIZE): Delete. Replace with:
(gas_hash_table_size): New static variable. (set_gas_hash_table_size): New function: Records a requested size for the hash tables. (get_gas_hash_table_size): New function: Return a prime number near the requested size of the hash table. (hash_new): Use get_gas_hash_table_size. * hash.h: Add a prototype for set_gas_hash_table_size. * as.c (show_usage): Add description of new switches: --hash-size and --reduce-memory-overheads. (option_values): Add OPTION_HASH_TABLE_SIZE and OPTION_REDUCE_MEMORY_OVERHEADS. (std_longpopts): Add entries for the new options. (parse_args): Handle the new options. * Makefile.am: Add a dependency of as.c on hash.h. * Makefile.in: Regenerate. * doc/as.texinfo: Document the new switches. * NEWS: Mention the new switches.
This commit is contained in:
parent
f394e3dd2e
commit
4bdd3565f1
|
@ -1,3 +1,24 @@
|
|||
2005-04-12 Nick Clifton <nickc@redhat.com>
|
||||
|
||||
* hash.c (DEFAULT_SIZE): Delete. Replace with:
|
||||
(gas_hash_table_size): New static variable.
|
||||
(set_gas_hash_table_size): New function: Records a requested size
|
||||
for the hash tables.
|
||||
(get_gas_hash_table_size): New function: Return a prime number
|
||||
near the requested size of the hash table.
|
||||
(hash_new): Use get_gas_hash_table_size.
|
||||
* hash.h: Add a prototype for set_gas_hash_table_size.
|
||||
* as.c (show_usage): Add description of new switches: --hash-size
|
||||
and --reduce-memory-overheads.
|
||||
(option_values): Add OPTION_HASH_TABLE_SIZE and
|
||||
OPTION_REDUCE_MEMORY_OVERHEADS.
|
||||
(std_longpopts): Add entries for the new options.
|
||||
(parse_args): Handle the new options.
|
||||
* Makefile.am: Add a dependency of as.c on hash.h.
|
||||
* Makefile.in: Regenerate.
|
||||
* doc/as.texinfo: Document the new switches.
|
||||
* NEWS: Mention the new switches.
|
||||
|
||||
2005-04-12 Nick Clifton <nickc@redhat.com>
|
||||
|
||||
PR gas/818
|
||||
|
|
|
@ -2441,7 +2441,7 @@ BMKDEP = #DO NOT PUT ANYTHING BETWEEN THIS LINE AND THE MATCHING WARNING ABOVE.
|
|||
#MKDEP DO NOT PUT ANYTHING BETWEEN THIS LINE AND THE MATCHING WARNING BELOW.
|
||||
app.o: app.c $(INCDIR)/symcat.h
|
||||
as.o: as.c $(INCDIR)/symcat.h subsegs.h $(INCDIR)/obstack.h \
|
||||
output-file.h sb.h macro.h dwarf2dbg.h dw2gencfi.h \
|
||||
output-file.h sb.h macro.h dwarf2dbg.h dw2gencfi.h hash.h \
|
||||
$(INCDIR)/elf/dwarf2.h $(BFDVER_H)
|
||||
atof-generic.o: atof-generic.c $(INCDIR)/symcat.h $(INCDIR)/safe-ctype.h
|
||||
bignum-copy.o: bignum-copy.c $(INCDIR)/symcat.h
|
||||
|
|
|
@ -3358,7 +3358,7 @@ dep-am: DEP
|
|||
#MKDEP DO NOT PUT ANYTHING BETWEEN THIS LINE AND THE MATCHING WARNING BELOW.
|
||||
app.o: app.c $(INCDIR)/symcat.h
|
||||
as.o: as.c $(INCDIR)/symcat.h subsegs.h $(INCDIR)/obstack.h \
|
||||
output-file.h sb.h macro.h dwarf2dbg.h dw2gencfi.h \
|
||||
output-file.h sb.h macro.h dwarf2dbg.h dw2gencfi.h hash.h \
|
||||
$(INCDIR)/elf/dwarf2.h $(BFDVER_H)
|
||||
atof-generic.o: atof-generic.c $(INCDIR)/symcat.h $(INCDIR)/safe-ctype.h
|
||||
bignum-copy.o: bignum-copy.c $(INCDIR)/symcat.h
|
||||
|
|
6
gas/NEWS
6
gas/NEWS
|
@ -1,11 +1,15 @@
|
|||
-*- text -*-
|
||||
|
||||
* Added --reduce-memory-overheads switch to reduce the size of the hash
|
||||
tables used, at the expense of longer assembly times, and
|
||||
--hash-size=<NUMBER> to set the size of the hash tables used by gas.
|
||||
|
||||
* Macro names and macro parameter names can now be any identifier that would
|
||||
also be legal as a symbol elsewhere. For macro parameter names, this is
|
||||
known to cause problems in certain sources when the respective target uses
|
||||
characters inconsistently, and thus macro parameter references may no longer
|
||||
be recognized as such (see the documentation for details).
|
||||
|
||||
|
||||
* Support the .f_floating, .d_floating, .g_floating and .h_floating directives
|
||||
for the VAX target in order to be more compatible with the VAX MACRO
|
||||
assembler.
|
||||
|
|
29
gas/as.c
29
gas/as.c
|
@ -42,6 +42,7 @@
|
|||
#include "macro.h"
|
||||
#include "dwarf2dbg.h"
|
||||
#include "dw2gencfi.h"
|
||||
#include "hash.h"
|
||||
|
||||
#ifdef BFD_ASSEMBLER
|
||||
#include "bfdver.h"
|
||||
|
@ -292,6 +293,8 @@ Options:\n\
|
|||
fprintf (stream, _("\
|
||||
--gdwarf-2 generate DWARF2 debugging information\n"));
|
||||
fprintf (stream, _("\
|
||||
--hash-size=<value> set the hash table size close to <value>\n"));
|
||||
fprintf (stream, _("\
|
||||
--help show this message and exit\n"));
|
||||
fprintf (stream, _("\
|
||||
--target-help show target specific options\n"));
|
||||
|
@ -314,6 +317,10 @@ Options:\n\
|
|||
fprintf (stream, _("\
|
||||
-R fold data section into text section\n"));
|
||||
fprintf (stream, _("\
|
||||
--reduce-memory-overheads \n\
|
||||
prefer smaller memory use at the cost of longer\n\
|
||||
assembly times\n"));
|
||||
fprintf (stream, _("\
|
||||
--statistics print various measured statistics from execution\n"));
|
||||
fprintf (stream, _("\
|
||||
--strip-local-absolute strip local absolute symbols\n"));
|
||||
|
@ -426,6 +433,8 @@ parse_args (int * pargc, char *** pargv)
|
|||
OPTION_EXECSTACK,
|
||||
OPTION_NOEXECSTACK,
|
||||
OPTION_ALTERNATE,
|
||||
OPTION_HASH_TABLE_SIZE,
|
||||
OPTION_REDUCE_MEMORY_OVERHEADS,
|
||||
OPTION_WARN_FATAL
|
||||
/* When you add options here, check that they do
|
||||
not collide with OPTION_MD_BASE. See as.h. */
|
||||
|
@ -457,6 +466,7 @@ parse_args (int * pargc, char *** pargv)
|
|||
,{"gen-debug", no_argument, NULL, 'g'}
|
||||
,{"gstabs", no_argument, NULL, OPTION_GSTABS}
|
||||
,{"gstabs+", no_argument, NULL, OPTION_GSTABS_PLUS}
|
||||
,{"hash-size", required_argument, NULL, OPTION_HASH_TABLE_SIZE}
|
||||
,{"help", no_argument, NULL, OPTION_HELP}
|
||||
/* New option for extending instruction set (see also -t above).
|
||||
The "-t file" or "--itbl file" option extends the basic set of
|
||||
|
@ -478,6 +488,7 @@ parse_args (int * pargc, char *** pargv)
|
|||
,{"mri", no_argument, NULL, 'M'}
|
||||
,{"nocpp", no_argument, NULL, OPTION_NOCPP}
|
||||
,{"no-warn", no_argument, NULL, 'W'}
|
||||
,{"reduce-memory-overheads", no_argument, NULL, OPTION_REDUCE_MEMORY_OVERHEADS}
|
||||
,{"statistics", no_argument, NULL, OPTION_STATISTICS}
|
||||
,{"strip-local-absolute", no_argument, NULL, OPTION_STRIP_LOCAL_ABSOLUTE}
|
||||
,{"version", no_argument, NULL, OPTION_VERSION}
|
||||
|
@ -865,6 +876,24 @@ the GNU General Public License. This program has absolutely no warranty.\n"));
|
|||
case 'X':
|
||||
/* -X means treat warnings as errors. */
|
||||
break;
|
||||
|
||||
case OPTION_REDUCE_MEMORY_OVERHEADS:
|
||||
/* The only change we make at the moment is to reduce
|
||||
the size of the hash tables that we use. */
|
||||
set_gas_hash_table_size (4051);
|
||||
break;
|
||||
|
||||
case OPTION_HASH_TABLE_SIZE:
|
||||
{
|
||||
bfd_size_type new_size;
|
||||
|
||||
new_size = strtoul (optarg, NULL, 0);
|
||||
if (new_size)
|
||||
set_gas_hash_table_size (new_size);
|
||||
else
|
||||
as_fatal (_("--hash-size needs a numeric argument"));
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
|
|
@ -227,14 +227,15 @@ gcc(1), ld(1), and the Info entries for @file{binutils} and @file{ld}.
|
|||
@smallexample
|
||||
@c man begin SYNOPSIS
|
||||
@value{AS} [@b{-a}[@b{cdhlns}][=@var{file}]] [@b{--alternate}] [@b{-D}]
|
||||
[@b{--defsym} @var{sym}=@var{val}] [@b{-f}] [@b{-g}] [@b{--gstabs}] [@b{--gstabs+}]
|
||||
[@b{--gdwarf-2}] [@b{--help}] [@b{-I} @var{dir}] [@b{-J}] [@b{-K}] [@b{-L}]
|
||||
[@b{--listing-lhs-width}=@var{NUM}] [@b{--listing-lhs-width2}=@var{NUM}]
|
||||
[@b{--listing-rhs-width}=@var{NUM}] [@b{--listing-cont-lines}=@var{NUM}]
|
||||
[@b{--keep-locals}] [@b{-o} @var{objfile}] [@b{-R}] [@b{--statistics}] [@b{-v}]
|
||||
[@b{-version}] [@b{--version}] [@b{-W}] [@b{--warn}] [@b{--fatal-warnings}]
|
||||
[@b{-w}] [@b{-x}] [@b{-Z}] [@b{--target-help}] [@var{target-options}]
|
||||
[@b{--}|@var{files} @dots{}]
|
||||
[@b{--defsym} @var{sym}=@var{val}] [@b{-f}] [@b{-g}] [@b{--gstabs}]
|
||||
[@b{--gstabs+}] [@b{--gdwarf-2}] [@b{--help}] [@b{-I} @var{dir}] [@b{-J}]
|
||||
[@b{-K}] [@b{-L}] [@b{--listing-lhs-width}=@var{NUM}]
|
||||
[@b{--listing-lhs-width2}=@var{NUM}] [@b{--listing-rhs-width}=@var{NUM}]
|
||||
[@b{--listing-cont-lines}=@var{NUM}] [@b{--keep-locals}] [@b{-o}
|
||||
@var{objfile}] [@b{-R}] [@b{--reduce-memory-overheads}] [@b{--statistics}]
|
||||
[@b{-v}] [@b{-version}] [@b{--version}] [@b{-W}] [@b{--warn}]
|
||||
[@b{--fatal-warnings}] [@b{-w}] [@b{-x}] [@b{-Z}] [@b{--target-help}]
|
||||
[@var{target-options}] [@b{--}|@var{files} @dots{}]
|
||||
@c
|
||||
@c Target dependent options are listed below. Keep the list sorted.
|
||||
@c Add an empty line for separation.
|
||||
|
@ -554,6 +555,18 @@ Name the object-file output from @command{@value{AS}} @var{objfile}.
|
|||
@item -R
|
||||
Fold the data section into the text section.
|
||||
|
||||
@kindex --hash-size=@var{number}
|
||||
Set the default size of GAS's hash tables to a prime number close to
|
||||
@var{number}. Increasing this value can reduce the length of time it takes the
|
||||
assembler to perform its tasks, at the expense of increasing the assembler's
|
||||
memory requirements. Similarly reducing this value can reduce the memory
|
||||
requirements at the expense of speed.
|
||||
|
||||
@item --reduce-memory-overheads
|
||||
This option reduces GAS's memory requirements, at the expense of making the
|
||||
assembly processes slower. Currently this switch is a synonym for
|
||||
@samp{--hash-size=4051}, but in the future it may have other effects as well.
|
||||
|
||||
@item --statistics
|
||||
Print the maximum space (in bytes) and total time (in seconds) used by
|
||||
assembly.
|
||||
|
|
46
gas/hash.c
46
gas/hash.c
|
@ -1,6 +1,6 @@
|
|||
/* hash.c -- gas hash table code
|
||||
Copyright 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999,
|
||||
2000, 2001, 2002, 2003
|
||||
2000, 2001, 2002, 2003, 2005
|
||||
Free Software Foundation, Inc.
|
||||
|
||||
This file is part of GAS, the GNU Assembler.
|
||||
|
@ -33,10 +33,6 @@
|
|||
#include "safe-ctype.h"
|
||||
#include "obstack.h"
|
||||
|
||||
/* The default number of entries to use when creating a hash table. */
|
||||
|
||||
#define DEFAULT_SIZE (4051)
|
||||
|
||||
/* An entry in a hash table. */
|
||||
|
||||
struct hash_entry {
|
||||
|
@ -72,6 +68,40 @@ struct hash_control {
|
|||
#endif /* HASH_STATISTICS */
|
||||
};
|
||||
|
||||
/* The default number of entries to use when creating a hash table.
|
||||
Note this value can be reduced to 4051 by using the command line
|
||||
switch --reduce-memory-overheads, or set to other values by using
|
||||
the --hash-size=<NUMBER> switch. */
|
||||
|
||||
static unsigned int gas_hash_table_size = 65537;
|
||||
|
||||
void
|
||||
set_gas_hash_table_size (unsigned int size)
|
||||
{
|
||||
gas_hash_table_size = size;
|
||||
}
|
||||
|
||||
/* FIXME: This function should be amalgmated with bfd/hash.c:bfd_hash_set_default_size(). */
|
||||
static unsigned int
|
||||
get_gas_hash_table_size (void)
|
||||
{
|
||||
/* Extend this prime list if you want more granularity of hash table size. */
|
||||
static const unsigned int hash_size_primes[] =
|
||||
{
|
||||
1021, 4051, 8599, 16699, 65537
|
||||
};
|
||||
unsigned int index;
|
||||
|
||||
/* Work out the best prime number near the hash_size.
|
||||
FIXME: This could be a more sophisticated algorithm,
|
||||
but is it really worth implementing it ? */
|
||||
for (index = 0; index < ARRAY_SIZE (hash_size_primes) - 1; ++index)
|
||||
if (gas_hash_table_size <= hash_size_primes[index])
|
||||
break;
|
||||
|
||||
return hash_size_primes[index];
|
||||
}
|
||||
|
||||
/* Create a hash table. This return a control block. */
|
||||
|
||||
struct hash_control *
|
||||
|
@ -81,12 +111,12 @@ hash_new (void)
|
|||
struct hash_control *ret;
|
||||
unsigned int alloc;
|
||||
|
||||
size = DEFAULT_SIZE;
|
||||
size = get_gas_hash_table_size ();
|
||||
|
||||
ret = (struct hash_control *) xmalloc (sizeof *ret);
|
||||
ret = xmalloc (sizeof *ret);
|
||||
obstack_begin (&ret->memory, chunksize);
|
||||
alloc = size * sizeof (struct hash_entry *);
|
||||
ret->table = (struct hash_entry **) obstack_alloc (&ret->memory, alloc);
|
||||
ret->table = obstack_alloc (&ret->memory, alloc);
|
||||
memset (ret->table, 0, alloc);
|
||||
ret->size = size;
|
||||
|
||||
|
|
|
@ -24,6 +24,10 @@
|
|||
|
||||
struct hash_control;
|
||||
|
||||
/* Set the size of the hash table used. */
|
||||
|
||||
void set_gas_hash_table_size (unsigned int);
|
||||
|
||||
/* Create a hash table. This return a control block. */
|
||||
|
||||
extern struct hash_control *hash_new (void);
|
||||
|
|
Loading…
Reference in New Issue