/* * Copyright (C) 2012-2018 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 * . */ #include "sfp-machine.h" void __sfp_handle_exceptions (int _fex) { const float fp_max = __FLT_MAX__; const float fp_min = __FLT_MIN__; const float fp_1e32 = 1.0e32f; const float fp_zero = 0.0; const float fp_one = 1.0; unsigned fpsr; if (_fex & FP_EX_INVALID) { __asm__ __volatile__ ("fdiv\ts0, %s0, %s0" : : "w" (fp_zero) : "s0"); __asm__ __volatile__ ("mrs\t%0, fpsr" : "=r" (fpsr)); } if (_fex & FP_EX_DIVZERO) { __asm__ __volatile__ ("fdiv\ts0, %s0, %s1" : : "w" (fp_one), "w" (fp_zero) : "s0"); __asm__ __volatile__ ("mrs\t%0, fpsr" : "=r" (fpsr)); } if (_fex & FP_EX_OVERFLOW) { __asm__ __volatile__ ("fadd\ts0, %s0, %s1" : : "w" (fp_max), "w" (fp_1e32) : "s0"); __asm__ __volatile__ ("mrs\t%0, fpsr" : "=r" (fpsr)); } if (_fex & FP_EX_UNDERFLOW) { __asm__ __volatile__ ("fmul\ts0, %s0, %s0" : : "w" (fp_min) : "s0"); __asm__ __volatile__ ("mrs\t%0, fpsr" : "=r" (fpsr)); } if (_fex & FP_EX_INEXACT) { __asm__ __volatile__ ("fsub\ts0, %s0, %s1" : : "w" (fp_max), "w" (fp_one) : "s0"); __asm__ __volatile__ ("mrs\t%0, fpsr" : "=r" (fpsr)); } }