mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-26 04:31:03 +00:00
220622dde5
This patch adds a new macro, libm_alias_finite, to define all _finite symbol. It sets all _finite symbol as compat symbol based on its first version (obtained from the definition at built generated first-versions.h). The <fn>f128_finite symbols were introduced in GLIBC 2.26 and so need special treatment in code that is shared between long double and float128. It is done by adding a list, similar to internal symbol redifinition, on sysdeps/ieee754/float128/float128_private.h. Alpha also needs some tricky changes to ensure we still emit 2 compat symbols for sqrt(f). Passes buildmanyglibc. Co-authored-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
47 lines
1.4 KiB
C
47 lines
1.4 KiB
C
/* Compute square root for double. ARM version.
|
|
Copyright (C) 2016-2020 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
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#ifdef __SOFTFP__
|
|
|
|
/* Use architecture-indendent sqrt implementation. */
|
|
# include <sysdeps/ieee754/dbl-64/e_sqrt.c>
|
|
|
|
#else
|
|
|
|
/* Use VFP square root instruction. */
|
|
# include <math.h>
|
|
# include <sysdep.h>
|
|
# include <libm-alias-finite.h>
|
|
|
|
double
|
|
__ieee754_sqrt (double x)
|
|
{
|
|
double ret;
|
|
# if __ARM_ARCH >= 6
|
|
asm ("vsqrt.f64 %P0, %P1" : "=w" (ret) : "w" (x));
|
|
# else
|
|
/* As in GCC, for VFP9 Erratum 760019 avoid overwriting the
|
|
input. */
|
|
asm ("vsqrt.f64 %P0, %P1" : "=&w" (ret) : "w" (x));
|
|
# endif
|
|
return ret;
|
|
}
|
|
libm_alias_finite (__ieee754_sqrt, __sqrt)
|
|
|
|
#endif
|