| 1 | /* Software floating-point exception handling emulation. |
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| 2 | Copyright (C) 2002-2024 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library. If not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #include <signal.h> |
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| 20 | #include "soft-fp.h" |
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| 21 | #include "soft-supp.h" |
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| 22 | |
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| 23 | /* Thread-local to store sticky exceptions. */ |
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| 24 | __thread int __sim_exceptions_thread; |
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| 25 | libc_hidden_tls_def (__sim_exceptions_thread); |
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| 26 | |
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| 27 | /* By default, no exceptions should trap. */ |
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| 28 | __thread int __sim_disabled_exceptions_thread = 0xffffffff; |
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| 29 | libc_hidden_tls_def (__sim_disabled_exceptions_thread); |
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| 30 | |
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| 31 | __thread int __sim_round_mode_thread; |
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| 32 | libc_hidden_tls_def (__sim_round_mode_thread); |
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| 33 | |
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| 34 | #if SIM_GLOBAL_COMPAT |
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| 35 | int __sim_exceptions_global; |
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| 36 | libc_hidden_data_def (__sim_exceptions_global); |
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| 37 | SIM_COMPAT_SYMBOL (__sim_exceptions_global, __sim_exceptions); |
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| 38 | |
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| 39 | int __sim_disabled_exceptions_global = 0xffffffff; |
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| 40 | libc_hidden_data_def (__sim_disabled_exceptions_global); |
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| 41 | SIM_COMPAT_SYMBOL (__sim_disabled_exceptions_global, |
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| 42 | __sim_disabled_exceptions); |
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| 43 | |
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| 44 | int __sim_round_mode_global; |
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| 45 | libc_hidden_data_def (__sim_round_mode_global); |
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| 46 | SIM_COMPAT_SYMBOL (__sim_round_mode_global, __sim_round_mode); |
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| 47 | #endif |
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| 48 | |
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| 49 | void |
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| 50 | __simulate_exceptions (int x) |
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| 51 | { |
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| 52 | __sim_exceptions_thread |= x; |
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| 53 | SIM_SET_GLOBAL (__sim_exceptions_global, __sim_exceptions_thread); |
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| 54 | if (x & ~__sim_disabled_exceptions_thread) |
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| 55 | raise (SIGFPE); |
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| 56 | } |
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| 57 | |
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