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- /* Copyright (C) 2016-2022 Free Software Foundation, Inc.
- This file is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by the
- Free Software Foundation; either version 3, or (at your option) any
- later version.
- This file 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
- General Public License for more details.
- Under Section 7 of GPL version 3, you are granted additional
- permissions described in the GCC Runtime Library Exception, version
- 3.1, as published by the Free Software Foundation.
- You should have received a copy of the GNU General Public License and
- a copy of the GCC Runtime Library Exception along with this program;
- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
- <http://www.gnu.org/licenses/>. */
- #include "sfp-machine.h"
- /* Only provide exception support if we have hardware floating point and we can
- execute the mtfsf instruction. This would only be true if we are using the
- emulation routines for IEEE 128-bit floating point on pre-ISA 3.0 machines
- without the IEEE 128-bit floating point support. */
- #ifndef __NO_FPRS__
- void
- __sfp_handle_exceptions (int _fex)
- {
- const double fp_max = __DBL_MAX__;
- const double fp_min = __DBL_MIN__;
- const double fp_zero = (double) 0.0;
- const double fp_one = 1.0;
- double tmp;
- if (_fex & FP_EX_INVALID)
- {
- __asm__ __volatile__ ("fdiv %0, %1, %1"
- : "=f" (tmp)
- : "f" (fp_zero));
- }
- if (_fex & FP_EX_DIVZERO)
- {
- __asm__ __volatile__ ("fdiv %0, %1, %2"
- : "=f" (tmp)
- : "f" (fp_one), "f" (fp_zero));
- }
- if (_fex & FP_EX_OVERFLOW)
- {
- __asm__ __volatile__ ("fadd %0, %1, %1"
- : "=f" (tmp)
- : "f" (fp_max));
- }
- if (_fex & FP_EX_UNDERFLOW)
- {
- __asm__ __volatile__ ("fmul %0, %1, %1"
- : "=f" (tmp)
- : "f" (fp_min));
- }
- if (_fex & FP_EX_INEXACT)
- {
- __asm__ __volatile__ ("fsub %0, %1, %2"
- : "=f" (tmp)
- : "f" (fp_max), "f" (fp_one));
- }
- }
- #endif /* !__NO_FPRS__ */
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