projects / thirdparty / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| 492fbea1 | 1 | /* |
| a945c346 | 2 | * Copyright (C) 2012-2024 Free Software Foundation, Inc. |
| 492fbea1 UB |
3 | * |
| 4 | * This file is free software; you can redistribute it and/or modify it | |
| 5 | * under the terms of the GNU General Public License as published by the | |
| 6 | * Free Software Foundation; either version 3, or (at your option) any | |
| 7 | * later version. | |
| 8 | * | |
| 9 | * This file is distributed in the hope that it will be useful, but | |
| 10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 12 | * General Public License for more details. | |
| 13 | * | |
| 14 | * Under Section 7 of GPL version 3, you are granted additional | |
| 15 | * permissions described in the GCC Runtime Library Exception, version | |
| 16 | * 3.1, as published by the Free Software Foundation. | |
| 17 | * | |
| 18 | * You should have received a copy of the GNU General Public License and | |
| 19 | * a copy of the GCC Runtime Library Exception along with this program; | |
| 20 | * see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
| 21 | * <http://www.gnu.org/licenses/>. | |
| 22 | */ | |
| 23 | ||
| 73edb277 | 24 | #ifndef _SOFT_FLOAT |
| 492fbea1 UB |
25 | #include "sfp-machine.h" |
| 26 | ||
| 27 | struct fenv | |
| 28 | { | |
| 29 | unsigned short int __control_word; | |
| 30 | unsigned short int __unused1; | |
| 31 | unsigned short int __status_word; | |
| 32 | unsigned short int __unused2; | |
| 33 | unsigned short int __tags; | |
| 34 | unsigned short int __unused3; | |
| 35 | unsigned int __eip; | |
| 36 | unsigned short int __cs_selector; | |
| 37 | unsigned int __opcode:11; | |
| 38 | unsigned int __unused4:5; | |
| 39 | unsigned int __data_offset; | |
| 40 | unsigned short int __data_selector; | |
| 41 | unsigned short int __unused5; | |
| 832c1192 | 42 | } __attribute__ ((gcc_struct)); |
| 492fbea1 | 43 | |
| afb9b710 | 44 | #ifdef __SSE_MATH__ |
| d3a1459c UB |
45 | # define __math_force_eval_div(x, y) \ |
| 46 | do { asm ("" : "+x" (x)); asm volatile ("" : : "x" (x / y)); } while (0) | |
| afb9b710 | 47 | #else |
| d3a1459c UB |
48 | # define __math_force_eval_div(x, y) \ |
| 49 | do { asm ("" : "+t" (x)); asm volatile ("" : : "f" (x / y)); } while (0) | |
| afb9b710 UB |
50 | #endif |
| 51 | ||
| 492fbea1 UB |
52 | void |
| 53 | __sfp_handle_exceptions (int _fex) | |
| 54 | { | |
| d3a1459c UB |
55 | struct fenv temp; |
| 56 | ||
| 492fbea1 UB |
57 | if (_fex & FP_EX_INVALID) |
| 58 | { | |
| 59 | float f = 0.0f; | |
| d3a1459c | 60 | __math_force_eval_div (f, f); |
| 492fbea1 | 61 | } |
| d59a8fcc UB |
62 | if (_fex & FP_EX_DENORM) |
| 63 | { | |
| d59a8fcc UB |
64 | asm volatile ("fnstenv\t%0" : "=m" (temp)); |
| 65 | temp.__status_word |= FP_EX_DENORM; | |
| 66 | asm volatile ("fldenv\t%0" : : "m" (temp)); | |
| 67 | asm volatile ("fwait"); | |
| 68 | } | |
| 492fbea1 UB |
69 | if (_fex & FP_EX_DIVZERO) |
| 70 | { | |
| 71 | float f = 1.0f, g = 0.0f; | |
| d3a1459c | 72 | __math_force_eval_div (f, g); |
| 492fbea1 UB |
73 | } |
| 74 | if (_fex & FP_EX_OVERFLOW) | |
| 75 | { | |
| 492fbea1 UB |
76 | asm volatile ("fnstenv\t%0" : "=m" (temp)); |
| 77 | temp.__status_word |= FP_EX_OVERFLOW; | |
| 78 | asm volatile ("fldenv\t%0" : : "m" (temp)); | |
| 79 | asm volatile ("fwait"); | |
| 80 | } | |
| 81 | if (_fex & FP_EX_UNDERFLOW) | |
| 82 | { | |
| 492fbea1 UB |
83 | asm volatile ("fnstenv\t%0" : "=m" (temp)); |
| 84 | temp.__status_word |= FP_EX_UNDERFLOW; | |
| 85 | asm volatile ("fldenv\t%0" : : "m" (temp)); | |
| 86 | asm volatile ("fwait"); | |
| 87 | } | |
| 88 | if (_fex & FP_EX_INEXACT) | |
| 89 | { | |
| 9de84e84 | 90 | float f = 1.0f, g = 3.0f; |
| d3a1459c | 91 | __math_force_eval_div (f, g); |
| 492fbea1 | 92 | } |
| d1ac2471 | 93 | } |
| 73edb277 | 94 | #endif |