mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-10 07:10:06 +00:00
01e0451175
Starting with GCC 11, long double values can also be processed in vector registers if build with -march >= z14. Then GCC defines the __LONG_DOUBLE_VX__ macro. FYI: GCC commit "IBM Z: Introduce __LONG_DOUBLE_VX__ macro" https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=f47df2af313d2ce7f9149149010a142c2237beda
64 lines
2.2 KiB
C
64 lines
2.2 KiB
C
/* Control when floating-point expressions are evaluated. s390 version.
|
|
Copyright (C) 2019-2021 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/>. */
|
|
|
|
#ifndef S390_MATH_BARRIERS_H
|
|
#define S390_MATH_BARRIERS_H 1
|
|
|
|
#ifdef HAVE_S390_VX_GCC_SUPPORT
|
|
# define ASM_CONSTRAINT_VR "v"
|
|
# ifdef __LONG_DOUBLE_VX__
|
|
/* Starting with gcc 11, long double values can also be processed in vector
|
|
registers if build with -march >= z14. Then GCC defines the
|
|
__LONG_DOUBLE_VX__ macro. */
|
|
# define ASM_LONG_DOUBLE_IN_VR 1
|
|
# else
|
|
# define ASM_LONG_DOUBLE_IN_VR 0
|
|
# endif
|
|
#else
|
|
# define ASM_CONSTRAINT_VR
|
|
# define ASM_LONG_DOUBLE_IN_VR 0
|
|
#endif
|
|
|
|
#define math_opt_barrier(x) \
|
|
({ __typeof (x) __x = (x); \
|
|
if (! ASM_LONG_DOUBLE_IN_VR \
|
|
&& (__builtin_types_compatible_p (__typeof (x), _Float128) \
|
|
|| __builtin_types_compatible_p (__typeof (x), long double) \
|
|
) \
|
|
) \
|
|
__asm__ ("# math_opt_barrier_f128 %0" : "+fm" (__x)); \
|
|
else \
|
|
__asm__ ("# math_opt_barrier %0" \
|
|
: "+f" ASM_CONSTRAINT_VR "m" (__x)); \
|
|
__x; })
|
|
#define math_force_eval(x) \
|
|
({ __typeof (x) __x = (x); \
|
|
if (! ASM_LONG_DOUBLE_IN_VR \
|
|
&& (__builtin_types_compatible_p (__typeof (x), _Float128) \
|
|
|| __builtin_types_compatible_p (__typeof (x), long double) \
|
|
) \
|
|
) \
|
|
__asm__ __volatile__ ("# math_force_eval_f128 %0" \
|
|
: : "fm" (__x)); \
|
|
else \
|
|
__asm__ __volatile__ ("# math_force_eval %0" \
|
|
: : "f" ASM_CONSTRAINT_VR "m" (__x)); \
|
|
})
|
|
|
|
#endif
|