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/* Control when floating-point expressions are evaluated. s390 version.
Copyright (C) 2019-2025 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
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