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sparc: refactor sparc64 __mpn_sub_n selector to C

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This patch refactors the sparc64 ifunc selector to a C implementation.
Also, the generic symbol is moved to its own implementation file
sub_n-generic.S).

Checked on sparc64-linux-gnu and sparcv9-linux-gnu.

	* sysdeps/sparc/sparc64/multiarch/Makefile (sysdep_routines):
	Add sub_n-generic.
	* sysdeps/sparc/sparc64/multiarch/sub_n-generic.S: New file.
	* sysdeps/sparc/sparc64/multiarch/sub_n.c: Likewise.
	* sysdeps/sparc/sparc64/multiarch/sub_n.S: Remove file.

Signed-off-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
This commit is contained in:
Adhemerval Zanella 2017-10-13 14:53:13 -03:00
parent 023cade3b3
commit b70cbbfcc8
5 changed files with 37 additions and 57 deletions
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6
ChangeLog
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@ -1,5 +1,11 @@
2017-11-30 Adhemerval Zanella <adhemerval.zanella@linaro.org>
* sysdeps/sparc/sparc64/multiarch/Makefile (sysdep_routines):
Add sub_n-generic.
* sysdeps/sparc/sparc64/multiarch/sub_n-generic.S: New file.
* sysdeps/sparc/sparc64/multiarch/sub_n.c: Likewise.
* sysdeps/sparc/sparc64/multiarch/sub_n.S: Remove file.
* sysdeps/sparc/sparc64/multiarch/Makefile (sysdep_routines):
Add mul_1-generic.
* sysdeps/sparc/sparc64/multiarch/mul_1-generic.S: New file.

2
sysdeps/sparc/sparc64/multiarch/Makefile
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@ -14,7 +14,7 @@ endif
ifeq ($(subdir),stdlib)
sysdep_routines += mul_1-vis3 mul_1-generic addmul_1-vis3 submul_1-vis3 \
add_n-vis3 sub_n-vis3
add_n-vis3 sub_n-vis3 sub_n-generic
endif
ifeq ($(subdir),math)

2
sysdeps/sparc/sparc64/multiarch/sub_n-generic.S Normal file
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@ -0,0 +1,2 @@
#define __mpn_sub_n __mpn_sub_n_generic
#include <sysdeps/sparc/sparc64/sub_n.S>

56
sysdeps/sparc/sparc64/multiarch/sub_n.S
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@ -1,56 +0,0 @@
/* Multiple versions of sub_n
Copyright (C) 2013-2017 Free Software Foundation, Inc.
Contributed by David S. Miller (davem@davemloft.net)
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 <sysdep.h>
ENTRY(__mpn_sub_n)
.type __mpn_sub_n, @gnu_indirect_function
# ifdef SHARED
SETUP_PIC_REG_LEAF(o3, o5)
# endif
set HWCAP_SPARC_VIS3, %o1
andcc %o0, %o1, %g0
be 1f
nop
# ifdef SHARED
sethi %gdop_hix22(__mpn_sub_n_vis3), %o1
xor %o1, %gdop_lox10(__mpn_sub_n_vis3), %o1
# else
set __mpn_sub_n_vis3, %o1
# endif
ba 10f
nop
1:
# ifdef SHARED
sethi %gdop_hix22(__mpn_sub_n_generic), %o1
xor %o1, %gdop_lox10(__mpn_sub_n_generic), %o1
# else
set __mpn_sub_n_generic, %o1
# endif
10:
# ifdef SHARED
add %o3, %o1, %o1
# endif
retl
mov %o1, %o0
END(__mpn_sub_n)
#define __mpn_sub_n __mpn_sub_n_generic
#include "../sub_n.S"

28
sysdeps/sparc/sparc64/multiarch/sub_n.c Normal file
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@ -0,0 +1,28 @@
/* __mpn_sub_n ifunc resolver, Linux/sparc64 version.
Copyright (C) 2017 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 <gmp.h>
#include <sparc-ifunc.h>
extern __typeof (mpn_sub_n) __mpn_sub_n_vis3 attribute_hidden;
extern __typeof (mpn_sub_n) __mpn_sub_n_generic attribute_hidden;
sparc_libm_ifunc (__mpn_sub_n,
hwcap & HWCAP_SPARC_VIS3
? __mpn_sub_n_vis3
: __mpn_sub_n_generic)