[glibc/azanella/generic-strings] Parameterize op_t from memcopy.h

[glibc/azanella/generic-strings] Parameterize op_t from memcopy.h

[Adhemerval Zanella]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=3da77c56cf1832837fe962127e49584df8641147

commit 3da77c56cf1832837fe962127e49584df8641147
Author: Adhemerval Zanella Netto <adhemerval.zanella@linaro.org>
Date:   Tue Jan 10 18:00:50 2023 -0300

    Parameterize op_t from memcopy.h
    
    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.

Diff:
---
 string/memcmp.c                    |  1 -
 sysdeps/generic/memcopy.h          |  6 ++----
 sysdeps/generic/string-optype.h    | 24 ++++++++++++++++++++++++
 sysdeps/x86_64/x32/string-optype.h | 24 ++++++++++++++++++++++++
 4 files changed, 50 insertions(+), 5 deletions(-)

diff --git a/string/memcmp.c b/string/memcmp.c
index 067b2e6a42..ea0fa03e1c 100644
--- a/string/memcmp.c
+++ b/string/memcmp.c
@@ -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.  */
diff --git a/sysdeps/generic/memcopy.h b/sysdeps/generic/memcopy.h
index 9f3ffb5d30..b5ffa4d114 100644
--- a/sysdeps/generic/memcopy.h
+++ b/sysdeps/generic/memcopy.h
@@ -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.  */
diff --git a/sysdeps/generic/string-optype.h b/sysdeps/generic/string-optype.h
new file mode 100644
index 0000000000..42bdd2a145
--- /dev/null
+++ b/sysdeps/generic/string-optype.h
@@ -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 */
diff --git a/sysdeps/x86_64/x32/string-optype.h b/sysdeps/x86_64/x32/string-optype.h
new file mode 100644
index 0000000000..e7679f934f
--- /dev/null
+++ b/sysdeps/x86_64/x32/string-optype.h
@@ -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 */