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/* FPU control word bits. RISC-V version.
Copyright (C) 1996-2023 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 _FPU_CONTROL_H
#define _FPU_CONTROL_H
#include <features.h>
#ifndef __riscv_flen
# define _FPU_RESERVED 0xffffffff
# define _FPU_DEFAULT 0x00000000
typedef unsigned int fpu_control_t;
# define _FPU_GETCW(cw) (cw) = 0
# define _FPU_SETCW(cw) do { } while (0)
extern fpu_control_t __fpu_control;
#else /* __riscv_flen */
# define _FPU_RESERVED 0
# define _FPU_DEFAULT 0
# define _FPU_IEEE _FPU_DEFAULT
/* Type of the control word. */
typedef unsigned int fpu_control_t __attribute__ ((__mode__ (__SI__)));
/* Macros for accessing the hardware control word. */
# define _FPU_GETCW(cw) __asm__ volatile ("frsr %0" : "=r" (cw))
# define _FPU_SETCW(cw) __asm__ volatile ("fssr %z0" : : "rJ" (cw))
/* Default control word set at startup. */
extern fpu_control_t __fpu_control;
# define _FCLASS(x) (__extension__ ({ int __res; \
if (sizeof (x) * 8 > __riscv_flen) __builtin_trap (); \
if (sizeof (x) == 4) asm ("fclass.s %0, %1" : "=r" (__res) : "f" (x)); \
else if (sizeof (x) == 8) asm ("fclass.d %0, %1" : "=r" (__res) : "f" (x)); \
else __builtin_trap (); \
__res; }))
# define _FCLASS_MINF (1 << 0)
# define _FCLASS_MNORM (1 << 1)
# define _FCLASS_MSUBNORM (1 << 2)
# define _FCLASS_MZERO (1 << 3)
# define _FCLASS_PZERO (1 << 4)
# define _FCLASS_PSUBNORM (1 << 5)
# define _FCLASS_PNORM (1 << 6)
# define _FCLASS_PINF (1 << 7)
# define _FCLASS_SNAN (1 << 8)
# define _FCLASS_QNAN (1 << 9)
# define _FCLASS_ZERO (_FCLASS_MZERO | _FCLASS_PZERO)
# define _FCLASS_SUBNORM (_FCLASS_MSUBNORM | _FCLASS_PSUBNORM)
# define _FCLASS_NORM (_FCLASS_MNORM | _FCLASS_PNORM)
# define _FCLASS_INF (_FCLASS_MINF | _FCLASS_PINF)
# define _FCLASS_NAN (_FCLASS_SNAN | _FCLASS_QNAN)
#endif /* __riscv_flen */
#endif /* fpu_control.h */
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