73 lines
2.2 KiB
C
73 lines
2.2 KiB
C
/* Copyright (C) 2016-2017 Free Software Foundation, Inc.
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This file is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 3, or (at your option) any
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later version.
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This file is distributed in the hope that it will be useful, but
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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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General Public License for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#include "sfp-machine.h"
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/* Only provide exception support if we have hardware floating point and we can
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execute the mtfsf instruction. This would only be true if we are using the
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emulation routines for IEEE 128-bit floating point on pre-ISA 3.0 machines
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without the IEEE 128-bit floating point support. */
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#ifndef __NO_FPRS__
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void
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__sfp_handle_exceptions (int _fex)
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{
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const double fp_max = __DBL_MAX__;
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const double fp_min = __DBL_MIN__;
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const double fp_zero = (double) 0.0;
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const double fp_one = 1.0;
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double tmp;
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if (_fex & FP_EX_INVALID)
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{
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__asm__ __volatile__ ("fdiv %0, %1, %1"
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: "=f" (tmp)
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: "f" (fp_zero));
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}
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if (_fex & FP_EX_DIVZERO)
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{
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__asm__ __volatile__ ("fdiv %0, %1, %2"
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: "=f" (tmp)
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: "f" (fp_one), "f" (fp_zero));
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}
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if (_fex & FP_EX_OVERFLOW)
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{
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__asm__ __volatile__ ("fadd %0, %1, %1"
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: "=f" (tmp)
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: "f" (fp_max));
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}
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if (_fex & FP_EX_UNDERFLOW)
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{
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__asm__ __volatile__ ("fmul %0, %1, %1"
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: "=f" (tmp)
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: "f" (fp_min));
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}
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if (_fex & FP_EX_INEXACT)
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{
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__asm__ __volatile__ ("fsub %0, %1, %2"
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: "=f" (tmp)
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: "f" (fp_max), "f" (fp_one));
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}
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}
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#endif /* !__NO_FPRS__ */
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