projects / thirdparty / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| 492fbea1 UB |
1 | /* |
| 2 | * Copyright (C) 2012 Free Software Foundation, Inc. | |
| 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 | ||
| 24 | #include "sfp-machine.h" | |
| 25 | ||
| 26 | struct fenv | |
| 27 | { | |
| 28 | unsigned short int __control_word; | |
| 29 | unsigned short int __unused1; | |
| 30 | unsigned short int __status_word; | |
| 31 | unsigned short int __unused2; | |
| 32 | unsigned short int __tags; | |
| 33 | unsigned short int __unused3; | |
| 34 | unsigned int __eip; | |
| 35 | unsigned short int __cs_selector; | |
| 36 | unsigned int __opcode:11; | |
| 37 | unsigned int __unused4:5; | |
| 38 | unsigned int __data_offset; | |
| 39 | unsigned short int __data_selector; | |
| 40 | unsigned short int __unused5; | |
| 41 | }; | |
| 42 | ||
| 43 | void | |
| 44 | __sfp_handle_exceptions (int _fex) | |
| 45 | { | |
| 46 | if (_fex & FP_EX_INVALID) | |
| 47 | { | |
| 48 | float f = 0.0f; | |
| 49 | #ifdef __SSE__ | |
| 50 | asm volatile ("%vdivss\t{%0, %d0|%d0, %0}" : "+x" (f)); | |
| 51 | #else | |
| 52 | asm volatile ("fdiv\t{%y0, %0|%0, %y0}" : "+t" (f)); | |
| 53 | asm volatile ("fwait"); | |
| 54 | #endif | |
| 55 | } | |
| 56 | if (_fex & FP_EX_DIVZERO) | |
| 57 | { | |
| 58 | float f = 1.0f, g = 0.0f; | |
| 59 | #ifdef __SSE__ | |
| 60 | asm volatile ("%vdivss\t{%1, %d0|%d0, %1}" : "+x" (f) : "xm" (g)); | |
| 61 | #else | |
| 62 | asm volatile ("fdivs\t%1" : "+t" (f) : "m" (g)); | |
| 63 | asm volatile ("fwait"); | |
| 64 | #endif | |
| 65 | } | |
| 66 | if (_fex & FP_EX_OVERFLOW) | |
| 67 | { | |
| 68 | struct fenv temp; | |
| 69 | asm volatile ("fnstenv\t%0" : "=m" (temp)); | |
| 70 | temp.__status_word |= FP_EX_OVERFLOW; | |
| 71 | asm volatile ("fldenv\t%0" : : "m" (temp)); | |
| 72 | asm volatile ("fwait"); | |
| 73 | } | |
| 74 | if (_fex & FP_EX_UNDERFLOW) | |
| 75 | { | |
| 76 | struct fenv temp; | |
| 77 | asm volatile ("fnstenv\t%0" : "=m" (temp)); | |
| 78 | temp.__status_word |= FP_EX_UNDERFLOW; | |
| 79 | asm volatile ("fldenv\t%0" : : "m" (temp)); | |
| 80 | asm volatile ("fwait"); | |
| 81 | } | |
| 82 | if (_fex & FP_EX_INEXACT) | |
| 83 | { | |
| 84 | struct fenv temp; | |
| 85 | asm volatile ("fnstenv\t%0" : "=m" (temp)); | |
| 86 | temp.__status_word |= FP_EX_INEXACT; | |
| 87 | asm volatile ("fldenv\t%0" : : "m" (temp)); | |
| 88 | asm volatile ("fwait"); | |
| 89 | } | |
| 90 | }; |