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Diffstat (limited to 'libatomic/config/x86/fenv.c')
| -rw-r--r-- | libatomic/config/x86/fenv.c | 116 |
1 files changed, 0 insertions, 116 deletions
diff --git a/libatomic/config/x86/fenv.c b/libatomic/config/x86/fenv.c deleted file mode 100644 index 40b86dc3d4..0000000000 --- a/libatomic/config/x86/fenv.c +++ /dev/null @@ -1,116 +0,0 @@ -/* Copyright (C) 2013-2017 Free Software Foundation, Inc. - - This file is part of the GNU Atomic Library (libatomic). - - Libatomic 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 of the License, or - (at your option) any later version. - - Libatomic 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 "libatomic_i.h" - -#define FE_INVALID 0x01 -#define FE_DENORM 0x02 -#define FE_DIVBYZERO 0x04 -#define FE_OVERFLOW 0x08 -#define FE_UNDERFLOW 0x10 -#define FE_INEXACT 0x20 - -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; -}; - -/* Raise the supported floating-point exceptions from EXCEPTS. Other - bits in EXCEPTS are ignored. */ - -void -__atomic_feraiseexcept (int excepts) -{ - if (excepts & FE_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 (excepts & FE_DENORM) - { - struct fenv temp; - asm volatile ("fnstenv\t%0" : "=m" (temp)); - temp.__status_word |= FE_DENORM; - asm volatile ("fldenv\t%0" : : "m" (temp)); - asm volatile ("fwait"); - } - if (excepts & FE_DIVBYZERO) - { - 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 (excepts & FE_OVERFLOW) - { - struct fenv temp; - asm volatile ("fnstenv\t%0" : "=m" (temp)); - temp.__status_word |= FE_OVERFLOW; - asm volatile ("fldenv\t%0" : : "m" (temp)); - asm volatile ("fwait"); - } - if (excepts & FE_UNDERFLOW) - { - struct fenv temp; - asm volatile ("fnstenv\t%0" : "=m" (temp)); - temp.__status_word |= FE_UNDERFLOW; - asm volatile ("fldenv\t%0" : : "m" (temp)); - asm volatile ("fwait"); - } - if (excepts & FE_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 - } -} |