| /* |
| * Copyright (C) 2012-2021 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" |
| |
| 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)); |
| } |
| } |