i386/linux-2.3.21/include/asm-mips/fp.h

   1 /* $Id: fp.h,v 1.1 1998/07/16 17:01:54 ralf Exp $
   2  *
   3  * This file is subject to the terms and conditions of the GNU General Public
   4  * License.  See the file "COPYING" in the main directory of this archive
   5  * for more details.
   6  *
   7  * Copyright (C) 1998 by Ralf Baechle
   8  */
   9
  10 /*
  11  * Activate and deactive the floatingpoint accelerator.
  12  */
  13 #define enable_cp1()                                                    \
  14         __asm__ __volatile__(                                           \
  15                 ".set\tnoat\n\t"                                        \
  16                 "mfc0\t$1,$12\n\t"                                      \
  17                 "or\t$1,%0\n\t"                                         \
  18                 "mtc0\t$1,$12\n\t"                                      \
  19                 ".set\tat"                                              \
  20                 : : "r" (ST0_CU1));
  21
  22 #define disable_cp1()                                                   \
  23         __asm__ __volatile__(                                           \
  24                 ".set\tnoat\n\t"                                        \
  25                 "mfc0\t$1,$12\n\t"                                      \
  26                 "or\t$1,%0\n\t"                                         \
  27                 "xor\t$1,%0\n\t"                                        \
  28                 "mtc0\t$1,$12\n\t"                                      \
  29                 ".set\tat"                                              \
  30                 : : "r" (ST0_CU1));