mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-02 01:40:07 +00:00
7d67a196b6
This patch makes soft-fp use static assertions in place of conditional calls to abort, in places where there are checks for conditions (on the types for which a macro is used) that the code is not prepared to handle. The fallback definition of _FP_STATIC_ASSERT (for kernel use only, as only relevant to compilers not supported for building glibc) is as in misc/sys/cdefs.h. This means that soft-fp only ever calls abort for _FP_UNREACHABLE calls in builds with GCC versions before 4.5. Thus, there is no need for an abort declaration or <stdlib.h> include, since the kernel code handles defining abort as a macro itself - and so this avoids any need for an __KERNEL__ condition on the abort declaration to avoid it breaking with the kernel's macro definition. That is, this patch is intended to make glibc's soft-fp code suitable for kernel use with no kernel-local changes to the soft-fp code needed at all. Tested for powerpc-nofpu that installed stripped shared libraries are unchanged by the patch. One explicit <stdlib.h> include had to be added to a file that was relying on the include from soft-fp.h. * soft-fp/soft-fp.h (_FP_STATIC_ASSERT): New macro. [_LIBC]: Do not include <stdlib.h>. [!_LIBC] (abort): Remove declaration. * soft-fp/op-2.h (_FP_MUL_MEAT_2_120_240_double): Use _FP_STATIC_ASSERT instead of conditionally calling abort. * soft-fp/op-common.h (_FP_FROM_INT): Likewise. (_FP_EXTEND_CNAN): Likewise. (FP_TRUNC): Likewise. (__FP_CLZ): Likewise. * sysdeps/powerpc/nofpu/flt-rounds.c: Include <stdlib.h>.
41 lines
1.2 KiB
C
41 lines
1.2 KiB
C
/* Return current rounding mode as correct value for FLT_ROUNDS.
|
|
Copyright (C) 2013-2015 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 <stdlib.h>
|
|
|
|
#include "soft-fp.h"
|
|
#include "soft-supp.h"
|
|
|
|
int
|
|
__flt_rounds (void)
|
|
{
|
|
switch (__sim_round_mode_thread)
|
|
{
|
|
case FP_RND_ZERO:
|
|
return 0;
|
|
case FP_RND_NEAREST:
|
|
return 1;
|
|
case FP_RND_PINF:
|
|
return 2;
|
|
case FP_RND_MINF:
|
|
return 3;
|
|
default:
|
|
abort ();
|
|
}
|
|
}
|