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Parameterize op_t from memcopy.h

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It moves the op_t definition out to an specific header, adds
the attribute 'may-alias', and cleanup its duplicated definitions.

Checked with a build and check with run-built-tests=no for all major
Linux ABIs.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Adhemerval Zanella 2023-01-10 18:00:50 -03:00
parent 32c7acd464
commit d1a9b6d8e7
4 changed files with 50 additions and 5 deletions
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1
string/memcmp.c
View file

@ -46,7 +46,6 @@
/* Type to use for aligned memory operations.
This should normally be the biggest type supported by a single load
and store. Must be an unsigned type. */
# define op_t unsigned long int
# define OPSIZ (sizeof (op_t))
/* Threshold value for when to enter the unrolled loops. */

6
sysdeps/generic/memcopy.h
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@ -55,10 +55,8 @@
[I fail to understand. I feel stupid. --roland]
*/
/* Type to use for aligned memory operations.
This should normally be the biggest type supported by a single load
and store. */
#define op_t unsigned long int
/* Type to use for aligned memory operations. */
#include <string-optype.h>
#define OPSIZ (sizeof (op_t))
/* Type to use for unaligned operations. */

24
sysdeps/generic/string-optype.h Normal file
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@ -0,0 +1,24 @@
/* Define a type to use for word access. Generic version.
Copyright (C) 2023 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/>. */
#ifndef _STRING_OPTYPE_H
#define _STRING_OPTYPE_H 1
typedef unsigned long int __attribute__ ((__may_alias__)) op_t;
#endif /* string-optype.h */

24
sysdeps/x86_64/x32/string-optype.h Normal file
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@ -0,0 +1,24 @@
/* Define a type to use for word access. Generic version.
Copyright (C) 2023 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/>. */
#ifndef _STRING_OPTYPE_H
#define _STRING_OPTYPE_H 1
typedef unsigned long long int __attribute__ ((__may_alias__)) op_t;
#endif /* string-optype.h */