| 0,0 → 1,108 |
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| /* |
| * Copyright (C) 2012-2015 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/>. |
| */ |
| |
| #ifndef _SOFT_FLOAT |
| #include "sfp-machine.h" |
| |
| struct fenv |
| { |
| unsigned short int __control_word; |
| unsigned short int __unused1; |
| unsigned short int __status_word; |
| unsigned short int __unused2; |
| unsigned short int __tags; |
| unsigned short int __unused3; |
| unsigned int __eip; |
| unsigned short int __cs_selector; |
| unsigned int __opcode:11; |
| unsigned int __unused4:5; |
| unsigned int __data_offset; |
| unsigned short int __data_selector; |
| unsigned short int __unused5; |
| }; |
| |
| void |
| __sfp_handle_exceptions (int _fex) |
| { |
| if (_fex & FP_EX_INVALID) |
| { |
| float f = 0.0f; |
| #ifdef __SSE_MATH__ |
| volatile float r __attribute__ ((unused)); |
| asm volatile ("%vdivss\t{%0, %d0|%d0, %0}" : "+x" (f)); |
| r = f; /* Needed to trigger exception. */ |
| #else |
| asm volatile ("fdiv\t{%y0, %0|%0, %y0}" : "+t" (f)); |
| /* No need for fwait, exception is triggered by emitted fstp. */ |
| #endif |
| } |
| if (_fex & FP_EX_DENORM) |
| { |
| struct fenv temp; |
| asm volatile ("fnstenv\t%0" : "=m" (temp)); |
| temp.__status_word |= FP_EX_DENORM; |
| asm volatile ("fldenv\t%0" : : "m" (temp)); |
| asm volatile ("fwait"); |
| } |
| if (_fex & FP_EX_DIVZERO) |
| { |
| float f = 1.0f, g = 0.0f; |
| #ifdef __SSE_MATH__ |
| volatile float r __attribute__ ((unused)); |
| asm volatile ("%vdivss\t{%1, %d0|%d0, %1}" : "+x" (f) : "xm" (g)); |
| r = f; /* Needed to trigger exception. */ |
| #else |
| asm volatile ("fdivs\t%1" : "+t" (f) : "m" (g)); |
| /* No need for fwait, exception is triggered by emitted fstp. */ |
| #endif |
| } |
| if (_fex & FP_EX_OVERFLOW) |
| { |
| struct fenv temp; |
| asm volatile ("fnstenv\t%0" : "=m" (temp)); |
| temp.__status_word |= FP_EX_OVERFLOW; |
| asm volatile ("fldenv\t%0" : : "m" (temp)); |
| asm volatile ("fwait"); |
| } |
| if (_fex & FP_EX_UNDERFLOW) |
| { |
| struct fenv temp; |
| asm volatile ("fnstenv\t%0" : "=m" (temp)); |
| temp.__status_word |= FP_EX_UNDERFLOW; |
| asm volatile ("fldenv\t%0" : : "m" (temp)); |
| asm volatile ("fwait"); |
| } |
| if (_fex & FP_EX_INEXACT) |
| { |
| float f = 1.0f, g = 3.0f; |
| #ifdef __SSE_MATH__ |
| volatile float r __attribute__ ((unused)); |
| asm volatile ("%vdivss\t{%1, %d0|%d0, %1}" : "+x" (f) : "xm" (g)); |
| r = f; /* Needed to trigger exception. */ |
| #else |
| asm volatile ("fdivs\t%1" : "+t" (f) : "m" (g)); |
| /* No need for fwait, exception is triggered by emitted fstp. */ |
| #endif |
| } |
| }; |
| #endif |