diff options
Diffstat (limited to 'sysdeps/i386/fpu/fesetenv.c')
| -rw-r--r-- | sysdeps/i386/fpu/fesetenv.c | 131 |
1 files changed, 0 insertions, 131 deletions
diff --git a/sysdeps/i386/fpu/fesetenv.c b/sysdeps/i386/fpu/fesetenv.c deleted file mode 100644 index a338e5d555..0000000000 --- a/sysdeps/i386/fpu/fesetenv.c +++ /dev/null @@ -1,131 +0,0 @@ -/* Install given floating-point environment. - Copyright (C) 1997-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. */ - -#include <fenv.h> -#include <fpu_control.h> -#include <assert.h> -#include <unistd.h> -#include <ldsodefs.h> -#include <dl-procinfo.h> - - -/* All exceptions, including the x86-specific "denormal operand" - exception. */ -#define FE_ALL_EXCEPT_X86 (FE_ALL_EXCEPT | __FE_DENORM) - - -int -__fesetenv (const fenv_t *envp) -{ - fenv_t temp; - - /* The memory block used by fstenv/fldenv has a size of 28 bytes. */ - assert (sizeof (fenv_t) == 28); - - /* Install the environment specified by ENVP. But there are a few - values which we do not want to come from the saved environment. - Therefore, we get the current environment and replace the values - we want to use from the environment specified by the parameter. */ - __asm__ ("fnstenv %0" : "=m" (*&temp)); - - if (envp == FE_DFL_ENV) - { - temp.__control_word |= FE_ALL_EXCEPT_X86; - temp.__control_word &= ~FE_TOWARDZERO; - temp.__control_word |= _FPU_EXTENDED; - temp.__status_word &= ~FE_ALL_EXCEPT_X86; - } - else if (envp == FE_NOMASK_ENV) - { - temp.__control_word &= ~(FE_ALL_EXCEPT | FE_TOWARDZERO); - /* Keep the "denormal operand" exception masked. */ - temp.__control_word |= __FE_DENORM; - temp.__control_word |= _FPU_EXTENDED; - temp.__status_word &= ~FE_ALL_EXCEPT_X86; - } - else - { - temp.__control_word &= ~(FE_ALL_EXCEPT_X86 - | FE_TOWARDZERO - | _FPU_EXTENDED); - temp.__control_word |= (envp->__control_word - & (FE_ALL_EXCEPT_X86 - | FE_TOWARDZERO - | _FPU_EXTENDED)); - temp.__status_word &= ~FE_ALL_EXCEPT_X86; - temp.__status_word |= envp->__status_word & FE_ALL_EXCEPT_X86; - } - temp.__eip = 0; - temp.__cs_selector = 0; - temp.__opcode = 0; - temp.__data_offset = 0; - temp.__data_selector = 0; - - __asm__ ("fldenv %0" : : "m" (temp)); - - if (HAS_CPU_FEATURE (SSE)) - { - unsigned int mxcsr; - __asm__ ("stmxcsr %0" : "=m" (mxcsr)); - - if (envp == FE_DFL_ENV) - { - /* Clear SSE exceptions. */ - mxcsr &= ~FE_ALL_EXCEPT_X86; - /* Set mask for SSE MXCSR. */ - mxcsr |= (FE_ALL_EXCEPT_X86 << 7); - /* Set rounding to FE_TONEAREST. */ - mxcsr &= ~0x6000; - mxcsr |= (FE_TONEAREST << 3); - /* Clear the FZ and DAZ bits. */ - mxcsr &= ~0x8040; - } - else if (envp == FE_NOMASK_ENV) - { - /* Clear SSE exceptions. */ - mxcsr &= ~FE_ALL_EXCEPT_X86; - /* Do not mask exceptions. */ - mxcsr &= ~(FE_ALL_EXCEPT << 7); - /* Keep the "denormal operand" exception masked. */ - mxcsr |= (__FE_DENORM << 7); - /* Set rounding to FE_TONEAREST. */ - mxcsr &= ~0x6000; - mxcsr |= (FE_TONEAREST << 3); - /* Clear the FZ and DAZ bits. */ - mxcsr &= ~0x8040; - } - else - mxcsr = envp->__eip; - - __asm__ ("ldmxcsr %0" : : "m" (mxcsr)); - } - - /* Success. */ - return 0; -} - -#include <shlib-compat.h> -#if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2) -strong_alias (__fesetenv, __old_fesetenv) -compat_symbol (libm, __old_fesetenv, fesetenv, GLIBC_2_1); -#endif - -libm_hidden_def (__fesetenv) -libm_hidden_ver (__fesetenv, fesetenv) -versioned_symbol (libm, __fesetenv, fesetenv, GLIBC_2_2); |