diff options
Diffstat (limited to 'libm/powerpc/e500/fpu/fenv_libc.h')
| -rw-r--r-- | libm/powerpc/e500/fpu/fenv_libc.h | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/libm/powerpc/e500/fpu/fenv_libc.h b/libm/powerpc/e500/fpu/fenv_libc.h new file mode 100644 index 000000000..cd003eab7 --- /dev/null +++ b/libm/powerpc/e500/fpu/fenv_libc.h @@ -0,0 +1,77 @@ +/* Internal libc stuff for floating point environment routines. + Copyright (C) 2004 Free Software Foundation, Inc. + Contributed by Aldy Hernandez <aldyh@redhat.com>, 2004 + 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. */ + +#ifndef _FENV_LIBC_H +#define _FENV_LIBC_H 1 + +#include <fenv.h> + +extern int __feraiseexcept_internal (int __excepts); + +/* Equivalent to fegetenv, but returns a fenv_t instead of taking a + pointer. */ +#define fegetenv_register() \ + ({ unsigned fscr; asm volatile ("mfspefscr %0" : "=r" (fscr)); fscr; }) + +/* Equivalent to fesetenv, but takes a fenv_t instead of a pointer. */ +#define fesetenv_register(fscr) \ + ({ asm volatile ("mtspefscr %0" : : "r" (fscr)); }) + +typedef union +{ + fenv_t fenv; + unsigned int l[2]; +} fenv_union_t; + +/* Definitions of all the SPEFSCR bit numbers. */ +enum { + SPEFSCR_SOVH = 0x80000000, + SPEFSCR_OVH = 0x40000000, + SPEFSCR_FGH = 0x20000000, + SPEFSCR_FXH = 0x10000000, + SPEFSCR_FINVH = 0x08000000, + SPEFSCR_FDBZH = 0x04000000, + SPEFSCR_FUNFH = 0x02000000, + SPEFSCR_FOVFH = 0x01000000, + /* 2 unused bits. */ + SPEFSCR_FINXS = 0x00200000, + SPEFSCR_FINVS = 0x00100000, + SPEFSCR_FDBZS = 0x00080000, + SPEFSCR_FUNFS = 0x00040000, + SPEFSCR_FOVFS = 0x00020000, + SPEFSCR_MODE = 0x00010000, + SPEFSCR_SOV = 0x00008000, + SPEFSCR_OV = 0x00004000, + SPEFSCR_FG = 0x00002000, + SPEFSCR_FX = 0x00001000, + SPEFSCR_FINV = 0x00000800, + SPEFSCR_FDBZ = 0x00000400, + SPEFSCR_FUNF = 0x00000200, + SPEFSCR_FOVF = 0x00000100, + /* 1 unused bit. */ + SPEFSCR_FINXE = 0x00000040, + SPEFSCR_FINVE = 0x00000020, + SPEFSCR_FDBZE = 0x00000010, + SPEFSCR_FUNFE = 0x00000008, + SPEFSCR_FOVFE = 0x00000004, + SPEFSCR_FRMC = 0x00000003 +}; + +#endif /* fenv_libc.h */ |