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PowerPC: initial support for multilib for PowerPC32

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This patch add a empty Makefile, the C IFUNC helper macros, and a empty
available IFUNC implementation enumeration.
This commit is contained in:
Adhemerval Zanella 2013-10-14 06:55:28 -05:00
parent f447922094
commit 4c628e0026
5 changed files with 116 additions and 2 deletions
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11
ChangeLog
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2013-12-06 Adhemerval Zanella <azanella@linux.vnet.ibm.com>
* sysdeps/powerpc/powerpc32/power4/multiarch/Makefile: New file to
support multiarch for POWER/PPC32.
* sysdeps/powerpc/powerpc32/power4/multiarch/ifunc-impl-list.c:
Likewise.
* sysdeps/powerpc/powerpc32/power4/multiarch/init-arch.h: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/power4/Implies: Remove
Implies file to make multiarch folder appers before the fpu and
default folder for power4 configuration.
2013-12-06 Siddhesh Poyarekar <siddhesh@redhat.com>
* scripts/bench.pl: Append volatile keyword to type.

3
sysdeps/powerpc/powerpc32/power4/multiarch/Makefile Normal file
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ifeq ($(subdir),string)
sysdep_routines +=
endif

50
sysdeps/powerpc/powerpc32/power4/multiarch/ifunc-impl-list.c Normal file
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/* Enumerate available IFUNC implementations of a function. PowerPC32 version.
Copyright (C) 2013 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/>. */
#include <assert.h>
#include <string.h>
#include <wchar.h>
#include <ldsodefs.h>
#include <ifunc-impl-list.h>
/* Maximum number of IFUNC implementations. */
#define MAX_IFUNC 6
size_t
__libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
size_t max)
{
assert (max >= MAX_IFUNC);
size_t i = 0;
unsigned long int hwcap = GLRO(dl_hwcap);
/* hwcap contains only the latest supported ISA, the code checks which is
and fills the previous supported ones. */
if (hwcap & PPC_FEATURE_ARCH_2_06)
hwcap |= PPC_FEATURE_ARCH_2_05 | PPC_FEATURE_POWER5_PLUS |
PPC_FEATURE_POWER5 | PPC_FEATURE_POWER4;
else if (hwcap & PPC_FEATURE_ARCH_2_05)
hwcap |= PPC_FEATURE_POWER5_PLUS | PPC_FEATURE_POWER5 | PPC_FEATURE_POWER4;
else if (hwcap & PPC_FEATURE_POWER5_PLUS)
hwcap |= PPC_FEATURE_POWER5 | PPC_FEATURE_POWER4;
else if (hwcap & PPC_FEATURE_POWER5)
hwcap |= PPC_FEATURE_POWER4;
return i;
}

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sysdeps/powerpc/powerpc32/power4/multiarch/init-arch.h Normal file
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/* This file is part of the GNU C Library.
Copyright (C) 2013 Free Software Foundation, Inc.
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/>. */
#include <ldsodefs.h>
/* The code checks if _rtld_global_ro was realocated before trying to access
the dl_hwcap field. The assembly is to make the compiler not optimize the
test (&_rtld_global_ro != NULL), which is always true in ISO C (but not
in that case since _rtld_global_ro might not been realocated yet). */
#if defined(SHARED) && !defined(IS_IN_rtld)
# define __GLRO(value) \
({ volatile void **__p = (volatile void**)(&_rtld_global_ro); \
unsigned long int __ret; \
asm ("# x in %0" : "+r" (__p)); \
__ret = (__p) ? GLRO(value) : 0; \
__ret; })
#else
# define __GLRO(value) GLRO(value)
#endif
/* dl_hwcap contains only the latest supported ISA, the macro checks which is
and fills the previous ones. */
#define INIT_ARCH() \
unsigned long int hwcap = __GLRO(dl_hwcap); \
if (hwcap & PPC_FEATURE_ARCH_2_06) \
hwcap |= PPC_FEATURE_ARCH_2_05 | \
PPC_FEATURE_POWER5_PLUS | \
PPC_FEATURE_POWER5 | \
PPC_FEATURE_POWER4; \
else if (hwcap & PPC_FEATURE_ARCH_2_05) \
hwcap |= PPC_FEATURE_POWER5_PLUS | \
PPC_FEATURE_POWER5 | \
PPC_FEATURE_POWER4; \
else if (hwcap & PPC_FEATURE_POWER5_PLUS) \
hwcap |= PPC_FEATURE_POWER5 | \
PPC_FEATURE_POWER4; \
else if (hwcap & PPC_FEATURE_POWER5) \
hwcap |= PPC_FEATURE_POWER4;

2
sysdeps/unix/sysv/linux/powerpc/powerpc32/power4/Implies
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powerpc/powerpc32/power4/fpu
powerpc/powerpc32/power4