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unknown-elf.h (STARTFILE_SPEC): Add conditional linking of crtfastmath.o.

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2015-05-06  Sandra Loosemore  <sandra@codesourcery.com>
	    Chris Jones  <chrisj@nvidia.com>
	    Joshua Conner  <jconner@nvidia.com>

	gcc/
	* config/arm/unknown-elf.h (STARTFILE_SPEC): Add conditional
	linking of crtfastmath.o.
	* config/arm/linux-eabi.h (STARTFILE_SPEC): Likewise.

	libgcc/
	* config.host (arm*-*-linux*): Add support for crtfastmath.o.
	(arm*-*-uclinux*): Likewise.
	(arm*-*-eabi* | arm*-*-rtems*): Likewise.
	* config/arm/crtfastmath.c: New file.


Co-Authored-By: Chris Jones <chrisj@nvidia.com>
Co-Authored-By: Joshua Conner <jconner@nvidia.com>

From-SVN: r222857
This commit is contained in:
Sandra Loosemore 2015-05-06 12:01:05 -04:00 committed by Sandra Loosemore
parent 29e597d0e6
commit 5a0ff57c48
6 changed files with 65 additions and 4 deletions
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8
gcc/ChangeLog
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@ -1,3 +1,11 @@
2015-05-06 Sandra Loosemore <sandra@codesourcery.com>
Chris Jones <chrisj@nvidia.com>
Joshua Conner <jconner@nvidia.com>
* config/arm/unknown-elf.h (STARTFILE_SPEC): Add conditional
linking of crtfastmath.o.
* config/arm/linux-eabi.h (STARTFILE_SPEC): Likewise.
2015-05-06 Segher Boessenkool <segher@kernel.crashing.org>
* config/rs6000/rs6000.md (cstore<mode>4_signed_imm): New expander.

1
gcc/config/arm/linux-eabi.h
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@ -107,6 +107,7 @@
#undef ENDFILE_SPEC
#define ENDFILE_SPEC \
"%{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s} " \
LINUX_OR_ANDROID_LD (GNU_USER_TARGET_ENDFILE_SPEC, ANDROID_ENDFILE_SPEC)
/* Use the default LIBGCC_SPEC, not the version in linux-elf.h, as we

4
gcc/config/arm/unknown-elf.h
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@ -32,7 +32,9 @@
#define UNKNOWN_ELF_STARTFILE_SPEC " crti%O%s crtbegin%O%s crt0%O%s"
#undef STARTFILE_SPEC
#define STARTFILE_SPEC UNKNOWN_ELF_STARTFILE_SPEC
#define STARTFILE_SPEC \
"%{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s} " \
UNKNOWN_ELF_STARTFILE_SPEC
#define UNKNOWN_ELF_ENDFILE_SPEC "crtend%O%s crtn%O%s"

9
libgcc/ChangeLog
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@ -1,3 +1,12 @@
2015-05-06 Sandra Loosemore <sandra@codesourcery.com>
Chris Jones <chrisj@nvidia.com>
Joshua Conner <jconner@nvidia.com>
* config.host (arm*-*-linux*): Add support for crtfastmath.o.
(arm*-*-uclinux*): Likewise.
(arm*-*-eabi* | arm*-*-rtems*): Likewise.
* config/arm/crtfastmath.c: New file.
2014-04-29 Bernd Schmidt <bernds@codesourcery.com>
* Makefile.in (real_host_noncanonical): New variable.

7
libgcc/config.host
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@ -377,14 +377,15 @@ arm*-*-netbsdelf*)
tmake_file="$tmake_file arm/t-arm arm/t-netbsd t-slibgcc-gld-nover"
;;
arm*-*-linux*) # ARM GNU/Linux with ELF
tmake_file="${tmake_file} arm/t-arm t-fixedpoint-gnu-prefix"
tmake_file="${tmake_file} arm/t-arm t-fixedpoint-gnu-prefix t-crtfm"
tmake_file="${tmake_file} arm/t-elf arm/t-bpabi arm/t-linux-eabi t-slibgcc-libgcc"
tm_file="$tm_file arm/bpabi-lib.h"
unwind_header=config/arm/unwind-arm.h
tmake_file="$tmake_file t-softfp-sfdf t-softfp-excl arm/t-softfp t-softfp"
extra_parts="$extra_parts crtfastmath.o"
;;
arm*-*-uclinux*) # ARM ucLinux
tmake_file="${tmake_file} t-fixedpoint-gnu-prefix"
tmake_file="${tmake_file} t-fixedpoint-gnu-prefix t-crtfm"
tmake_file="$tmake_file arm/t-arm arm/t-elf t-softfp-sfdf t-softfp-excl arm/t-softfp t-softfp"
tmake_file="${tmake_file} arm/t-bpabi"
tm_file="$tm_file arm/bpabi-lib.h"
@ -396,7 +397,7 @@ arm*-*-eabi* | arm*-*-symbianelf* | arm*-*-rtems*)
tm_file="$tm_file arm/bpabi-lib.h"
case ${host} in
arm*-*-eabi* | arm*-*-rtems*)
tmake_file="${tmake_file} arm/t-bpabi"
tmake_file="${tmake_file} arm/t-bpabi t-crtfm"
extra_parts="crtbegin.o crtend.o crti.o crtn.o"
;;
arm*-*-symbianelf*)

40
libgcc/config/arm/crtfastmath.c Normal file
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@ -0,0 +1,40 @@
/*
* Copyright (C) 2014 Free Software Foundation, Inc.
*
* This file is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 3, or (at your option) any
* later version.
*
* This file 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
* General Public License for more details.
*
* Under Section 7 of GPL version 3, you are granted additional
* permissions described in the GCC Runtime Library Exception, version
* 3.1, as published by the Free Software Foundation.
*
* You should have received a copy of the GNU General Public License and
* a copy of the GCC Runtime Library Exception along with this program;
* see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
* <http://www.gnu.org/licenses/>.
*/
/* Enable flush-to-zero support for -ffast-math on VFP targets. */
#ifndef __SOFTFP__
#define FPSCR_FZ (1 << 24)
static void __attribute__((constructor))
__arm_set_fast_math (void)
{
unsigned int fpscr_save;
/* Set the FZ (flush-to-zero) bit in FPSCR. */
__asm__("vmrs %0, fpscr" : "=r" (fpscr_save));
fpscr_save |= FPSCR_FZ;
__asm__("vmsr fpscr, %0" : : "r" (fpscr_save));
}
#endif /* __SOFTFP__ */