diff options
Diffstat (limited to 'sysdeps/i386/setfpucw.c')
-rw-r--r-- | sysdeps/i386/setfpucw.c | 54 |
1 files changed, 0 insertions, 54 deletions
diff --git a/sysdeps/i386/setfpucw.c b/sysdeps/i386/setfpucw.c deleted file mode 100644 index 40b995f18a..0000000000 --- a/sysdeps/i386/setfpucw.c +++ /dev/null @@ -1,54 +0,0 @@ -/* Set the FPU control word for x86. - Copyright (C) 2003-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - 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 <math.h> -#include <fpu_control.h> -#include <fenv.h> -#include <unistd.h> -#include <ldsodefs.h> -#include <dl-procinfo.h> - -void -__setfpucw (fpu_control_t set) -{ - fpu_control_t cw; - - /* Fetch the current control word. */ - __asm__ ("fnstcw %0" : "=m" (*&cw)); - - /* Preserve the reserved bits, and set the rest as the user - specified (or the default, if the user gave zero). */ - cw &= _FPU_RESERVED; - cw |= set & ~_FPU_RESERVED; - - __asm__ ("fldcw %0" : : "m" (*&cw)); - - /* If the CPU supports SSE, we set the MXCSR as well. */ - if (HAS_CPU_FEATURE (SSE)) - { - unsigned int xnew_exc; - - /* Get the current MXCSR. */ - __asm__ ("stmxcsr %0" : "=m" (*&xnew_exc)); - - xnew_exc &= ~((0xc00 << 3) | (FE_ALL_EXCEPT << 7)); - xnew_exc |= ((set & 0xc00) << 3) | ((set & FE_ALL_EXCEPT) << 7); - - __asm__ ("ldmxcsr %0" : : "m" (*&xnew_exc)); - } -} |