mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-29 16:21:07 +00:00
91 lines
2.9 KiB
C
91 lines
2.9 KiB
C
/* 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 _AARCH64_FPU_CONTROL_H
|
|
#define _AARCH64_FPU_CONTROL_H
|
|
|
|
#include <features.h>
|
|
|
|
/* Macros for accessing the FPCR and FPSR. */
|
|
|
|
#if __GNUC_PREREQ (6,0)
|
|
# define _FPU_GETCW(fpcr) (fpcr = __builtin_aarch64_get_fpcr ())
|
|
# define _FPU_SETCW(fpcr) __builtin_aarch64_set_fpcr (fpcr)
|
|
# define _FPU_GETFPSR(fpsr) (fpsr = __builtin_aarch64_get_fpsr ())
|
|
# define _FPU_SETFPSR(fpsr) __builtin_aarch64_set_fpsr (fpsr)
|
|
#else
|
|
# define _FPU_GETCW(fpcr) \
|
|
__asm__ __volatile__ ("mrs %0, fpcr" : "=r" (fpcr))
|
|
|
|
# define _FPU_SETCW(fpcr) \
|
|
__asm__ __volatile__ ("msr fpcr, %0" : : "r" (fpcr))
|
|
|
|
# define _FPU_GETFPSR(fpsr) \
|
|
__asm__ __volatile__ ("mrs %0, fpsr" : "=r" (fpsr))
|
|
|
|
# define _FPU_SETFPSR(fpsr) \
|
|
__asm__ __volatile__ ("msr fpsr, %0" : : "r" (fpsr))
|
|
#endif
|
|
|
|
/* Reserved bits should be preserved when modifying register
|
|
contents. These two masks indicate which bits in each of FPCR and
|
|
FPSR should not be changed. */
|
|
|
|
#define _FPU_RESERVED 0xfe0fe0f8
|
|
#define _FPU_FPSR_RESERVED 0x0fffffe0
|
|
|
|
#define _FPU_DEFAULT 0x00000000
|
|
#define _FPU_FPSR_DEFAULT 0x00000000
|
|
|
|
/* Layout of FPCR and FPSR:
|
|
|
|
| | | | | | | |
|
|
0 0 0 0 1 1 1 0 0 0 0 0 1 0 0 0 1 1 1 0 0 0 0 0 1 1 1 0 0 0 0 0
|
|
s s s s s s s s s s s
|
|
c c c c c c c c c c c c
|
|
N Z C V Q A D F R R S S S L L L I U U I U O D I I U U I U O D I
|
|
C H N Z M M T T B E E E D N N X F F Z O D N N X F F Z O
|
|
P O O R R Z N N N E K K E E E E E C K K C C C C C
|
|
D D I I P
|
|
E E D D
|
|
E E
|
|
*/
|
|
|
|
#define _FPU_FPCR_RM_MASK 0xc00000
|
|
|
|
#define _FPU_FPCR_MASK_IXE 0x1000
|
|
#define _FPU_FPCR_MASK_UFE 0x0800
|
|
#define _FPU_FPCR_MASK_OFE 0x0400
|
|
#define _FPU_FPCR_MASK_DZE 0x0200
|
|
#define _FPU_FPCR_MASK_IOE 0x0100
|
|
|
|
#define _FPU_FPCR_IEEE \
|
|
(_FPU_DEFAULT | _FPU_FPCR_MASK_IXE \
|
|
| _FPU_FPCR_MASK_UFE | _FPU_FPCR_MASK_OFE \
|
|
| _FPU_FPCR_MASK_DZE | _FPU_FPCR_MASK_IOE)
|
|
|
|
#define _FPU_FPSR_IEEE 0
|
|
|
|
typedef unsigned int fpu_control_t;
|
|
typedef unsigned int fpu_fpsr_t;
|
|
|
|
/* Default control word set at startup. */
|
|
extern fpu_control_t __fpu_control;
|
|
|
|
#endif
|