sysdeps/powerpc/powerpc32/e500/nofpu/fenv_libc.h

   1 /* Internal libc stuff for floating point environment routines.  e500 version.
   2    Copyright (C) 2004-2015 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _FENV_LIBC_H
  20 #define _FENV_LIBC_H    1
  21
  22 #include <fenv.h>
  23
  24 int __feraiseexcept_spe (int);
  25 libm_hidden_proto (__feraiseexcept_spe)
  26
  27 int __feraiseexcept_soft (int);
  28 libc_hidden_proto (__feraiseexcept_soft)
  29
  30 int __fexcepts_to_spe (int);
  31 libm_hidden_proto (__fexcepts_to_spe)
  32
  33 int __fexcepts_from_spe (int);
  34 libm_hidden_proto (__fexcepts_from_spe)
  35
  36 int __fexcepts_to_prctl (int);
  37 libm_hidden_proto (__fexcepts_to_prctl)
  38
  39 int __fexcepts_from_prctl (int);
  40 libm_hidden_proto (__fexcepts_from_prctl)
  41
  42 void __fe_note_change (void);
  43 libm_hidden_proto (__fe_note_change)
  44
  45 /* Equivalent to fegetenv, but returns an unsigned int instead of
  46    taking a pointer.  */
  47 #define fegetenv_register() \
  48   ({ unsigned int fscr; asm volatile ("mfspefscr %0" : "=r" (fscr)); fscr; })
  49
  50 /* Equivalent to fesetenv, but takes an unsigned int instead of a
  51    pointer.  */
  52 #define fesetenv_register(fscr) \
  53   ({ asm volatile ("mtspefscr %0" : : "r" (fscr)); })
  54
  55 typedef union
  56 {
  57   fenv_t fenv;
  58   unsigned int l[2];
  59 } fenv_union_t;
  60
  61 /* Definitions of all the SPEFSCR bit numbers.  */
  62 enum {
  63   SPEFSCR_SOVH          = 0x80000000,
  64   SPEFSCR_OVH           = 0x40000000,
  65   SPEFSCR_FGH           = 0x20000000,
  66   SPEFSCR_FXH           = 0x10000000,
  67   SPEFSCR_FINVH         = 0x08000000,
  68   SPEFSCR_FDBZH         = 0x04000000,
  69   SPEFSCR_FUNFH         = 0x02000000,
  70   SPEFSCR_FOVFH         = 0x01000000,
  71   /* 2 unused bits.  */
  72   SPEFSCR_FINXS         = 0x00200000,
  73   SPEFSCR_FINVS         = 0x00100000,
  74   SPEFSCR_FDBZS         = 0x00080000,
  75   SPEFSCR_FUNFS         = 0x00040000,
  76   SPEFSCR_FOVFS         = 0x00020000,
  77   /* Combination of the exception bits.  */
  78   SPEFSCR_ALL_EXCEPT    = 0x003e0000,
  79   SPEFSCR_MODE          = 0x00010000,
  80   SPEFSCR_SOV           = 0x00008000,
  81   SPEFSCR_OV            = 0x00004000,
  82   SPEFSCR_FG            = 0x00002000,
  83   SPEFSCR_FX            = 0x00001000,
  84   SPEFSCR_FINV          = 0x00000800,
  85   SPEFSCR_FDBZ          = 0x00000400,
  86   SPEFSCR_FUNF          = 0x00000200,
  87   SPEFSCR_FOVF          = 0x00000100,
  88   /* 1 unused bit.  */
  89   SPEFSCR_FINXE         = 0x00000040,
  90   SPEFSCR_FINVE         = 0x00000020,
  91   SPEFSCR_FDBZE         = 0x00000010,
  92   SPEFSCR_FUNFE         = 0x00000008,
  93   SPEFSCR_FOVFE         = 0x00000004,
  94   /* Combination of the exception trap enable bits.  */
  95   SPEFSCR_ALL_EXCEPT_ENABLE = 0x0000007c,
  96   SPEFSCR_FRMC          = 0x00000003
  97 };
  98
  99 #endif /* fenv_libc.h */