mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-25 06:20:06 +00:00
75 lines
2.6 KiB
C
75 lines
2.6 KiB
C
/* FPU control word bits. RISC-V version.
|
|
Copyright (C) 1996-2024 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 */
|