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GitHub Repository: PojavLauncherTeam/mobile
 Path: blob/master/src/hotspot/os_cpu/linux_arm/fpu_control.h
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/* FPU control word definitions.  ARM VFP version.

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   Copyright (C) 2004-2019 Free Software Foundation, Inc.

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   This file is part of the GNU C Library.

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   The GNU C Library is free software; you can redistribute it and/or

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   modify it under the terms of the GNU Lesser General Public

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   License as published by the Free Software Foundation; either

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   version 2.1 of the License, or (at your option) any later version.

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   The GNU C Library is distributed in the hope that it will be useful,

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   but WITHOUT ANY WARRANTY; without even the implied warranty of

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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

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   Lesser General Public License for more details.

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   You should have received a copy of the GNU Lesser General Public

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   License along with the GNU C Library.  If not, see

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   <http://www.gnu.org/licenses/>.  */

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#ifndef _FPU_CONTROL_H

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#define _FPU_CONTROL_H

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#if !(defined(_LIBC) && !defined(_LIBC_TEST)) && defined(__SOFTFP__)

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#define _FPU_RESERVED 0xffffffff

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#define _FPU_DEFAULT  0x00000000

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typedef unsigned int fpu_control_t;

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#define _FPU_GETCW(cw) (cw) = 0

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#define _FPU_SETCW(cw) (void) (cw)

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extern fpu_control_t __fpu_control;

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#else

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/* masking of interrupts */

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#define _FPU_MASK_IM        0x00000100        /* invalid operation */

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#define _FPU_MASK_ZM        0x00000200        /* divide by zero */

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#define _FPU_MASK_OM        0x00000400        /* overflow */

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#define _FPU_MASK_UM        0x00000800        /* underflow */

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#define _FPU_MASK_PM        0x00001000        /* inexact */

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#define _FPU_MASK_NZCV        0xf0000000        /* NZCV flags */

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#define _FPU_MASK_RM        0x00c00000        /* rounding mode */

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#define _FPU_MASK_EXCEPT 0x00001f1f        /* all exception flags */

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/* Some bits in the FPSCR are not yet defined.  They must be preserved when

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   modifying the contents.  */

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#define _FPU_RESERVED        0x00086060

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#define _FPU_DEFAULT    0x00000000

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/* Default + exceptions enabled.  */

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#define _FPU_IEEE        (_FPU_DEFAULT | 0x00001f00)

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/* Type of the control word.  */

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typedef unsigned int fpu_control_t;

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/* Macros for accessing the hardware control word.  */

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#ifdef __SOFTFP__

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/* This is fmrx %0, fpscr.  */

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# define _FPU_GETCW(cw) \

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  __asm__ __volatile__ ("mrc p10, 7, %0, cr1, cr0, 0" : "=r" (cw))

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/* This is fmxr fpscr, %0.  */

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# define _FPU_SETCW(cw) \

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  __asm__ __volatile__ ("mcr p10, 7, %0, cr1, cr0, 0" : : "r" (cw))

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#else

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# define _FPU_GETCW(cw) \

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  __asm__ __volatile__ ("vmrs %0, fpscr" : "=r" (cw))

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# define _FPU_SETCW(cw) \

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  __asm__ __volatile__ ("vmsr fpscr, %0" : : "r" (cw))

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#endif

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/* Default control word set at startup.  */

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extern fpu_control_t __fpu_control;

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#endif /* __SOFTFP__ */

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#endif /* _FPU_CONTROL_H */

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