mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-21 04:42:53 +08:00
1d506c26d9
This commit is the result of the following actions:
- Running gdb/copyright.py to update all of the copyright headers to
include 2024,
- Manually updating a few files the copyright.py script told me to
update, these files had copyright headers embedded within the
file,
- Regenerating gdbsupport/Makefile.in to refresh it's copyright
date,
- Using grep to find other files that still mentioned 2023. If
these files were updated last year from 2022 to 2023 then I've
updated them this year to 2024.
I'm sure I've probably missed some dates. Feel free to fix them up as
you spot them.
86 lines
2.2 KiB
C
86 lines
2.2 KiB
C
/* This file is part of SIS (SPARC instruction simulator)
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Copyright (C) 1995-2024 Free Software Foundation, Inc.
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Contributed by Jiri Gaisler, European Space Agency
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* This file implements the interface between the host and the simulated
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FPU. IEEE trap handling is done as follows:
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1. In the host, all IEEE traps are masked
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2. After each simulated FPU instruction, check if any exception
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occured by reading the exception bits from the host FPU status
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register (get_accex()).
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3. Propagate any exceptions to the simulated FSR.
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4. Clear host exception bits.
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*/
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/* This must come before any other includes. */
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#include "defs.h"
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#include "sis.h"
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#include <fenv.h>
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/* This routine should return the accrued exceptions */
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int
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get_accex(void)
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{
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int fexc, accx;
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fexc = fetestexcept (FE_ALL_EXCEPT);
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accx = 0;
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if (fexc & FE_INEXACT)
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accx |= 1;
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if (fexc & FE_DIVBYZERO)
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accx |= 2;
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if (fexc & FE_UNDERFLOW)
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accx |= 4;
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if (fexc & FE_OVERFLOW)
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accx |= 8;
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if (fexc & FE_INVALID)
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accx |= 0x10;
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return accx;
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}
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/* How to clear the accrued exceptions */
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void
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clear_accex(void)
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{
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feclearexcept (FE_ALL_EXCEPT);
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}
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/* How to map SPARC FSR onto the host */
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void
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set_fsr(uint32_t fsr)
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{
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int fround;
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fsr >>= 30;
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switch (fsr) {
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case 0:
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fround = FE_TONEAREST;
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break;
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case 1:
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fround = FE_TOWARDZERO;
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break;
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case 2:
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fround = FE_UPWARD;
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break;
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case 3:
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fround = FE_DOWNWARD;
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break;
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}
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fesetround (fround);
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}
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