diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/alpha/setfpucw.c')
-rw-r--r-- | sysdeps/unix/sysv/linux/alpha/setfpucw.c | 80 |
1 files changed, 0 insertions, 80 deletions
diff --git a/sysdeps/unix/sysv/linux/alpha/setfpucw.c b/sysdeps/unix/sysv/linux/alpha/setfpucw.c deleted file mode 100644 index a7e3a55812..0000000000 --- a/sysdeps/unix/sysv/linux/alpha/setfpucw.c +++ /dev/null @@ -1,80 +0,0 @@ -/* Set FP exception mask and rounding mode. - Copyright (C) 1996, 1997, 1998, 2003 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, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <fpu_control.h> -#include <asm/fpu.h> - -extern void __ieee_set_fp_control (unsigned long); -libc_hidden_proto(__ieee_set_fp_control) - -extern unsigned long __ieee_get_fp_control (void); -libc_hidden_proto(__ieee_get_fp_control) - -static inline unsigned long -rdfpcr (void) -{ - unsigned long fpcr; - asm ("excb; mf_fpcr %0" : "=f"(fpcr)); - return fpcr; -} - - -static inline void -wrfpcr (unsigned long fpcr) -{ - asm volatile ("mt_fpcr %0; excb" : : "f"(fpcr)); -} - - -void -__setfpucw (fpu_control_t fpu_control) -{ - unsigned long fpcr = 0, fpcw = 0; - - if (!fpu_control) - fpu_control = _FPU_DEFAULT; - - /* first, set dynamic rounding mode: */ - - fpcr = rdfpcr(); - fpcr &= ~FPCR_DYN_MASK; - switch (fpu_control & 0xc00) - { - case _FPU_RC_NEAREST: fpcr |= FPCR_DYN_NORMAL; break; - case _FPU_RC_DOWN: fpcr |= FPCR_DYN_MINUS; break; - case _FPU_RC_UP: fpcr |= FPCR_DYN_PLUS; break; - case _FPU_RC_ZERO: fpcr |= FPCR_DYN_CHOPPED; break; - } - wrfpcr(fpcr); - - /* now tell kernel about traps that we like to hear about: */ - - fpcw = __ieee_get_fp_control(); - fpcw &= ~IEEE_TRAP_ENABLE_MASK; - - if (!(fpu_control & _FPU_MASK_IM)) fpcw |= IEEE_TRAP_ENABLE_INV; - if (!(fpu_control & _FPU_MASK_DM)) fpcw |= IEEE_TRAP_ENABLE_UNF; - if (!(fpu_control & _FPU_MASK_ZM)) fpcw |= IEEE_TRAP_ENABLE_DZE; - if (!(fpu_control & _FPU_MASK_OM)) fpcw |= IEEE_TRAP_ENABLE_OVF; - if (!(fpu_control & _FPU_MASK_PM)) fpcw |= IEEE_TRAP_ENABLE_INE; - - __fpu_control = fpu_control; /* update global copy */ - - __ieee_set_fp_control(fpcw); -} |