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Diffstat (limited to 'sysdeps/sparc64/fpu_control.h')
-rw-r--r-- | sysdeps/sparc64/fpu_control.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/sysdeps/sparc64/fpu_control.h b/sysdeps/sparc64/fpu_control.h new file mode 100644 index 0000000..fd8abb1 --- /dev/null +++ b/sysdeps/sparc64/fpu_control.h @@ -0,0 +1,69 @@ +/* FPU control word bits. SPARC v9 version. + Copyright (C) 1997 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Miguel de Icaza + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#ifndef _FPU_CONTROL_H +#define _FPU_CONTROL_H 1 + + +#include <features.h> + +/* precision control */ +#define _FPU_EXTENDED 0x00000000 /* RECOMMENDED */ +#define _FPU_DOUBLE 0x20000000 +#define _FPU_80BIT 0x30000000 +#define _FPU_SINGLE 0x10000000 /* DO NOT USE */ + +/* rounding control / Sparc */ +#define _FPU_RC_DOWN 0xc0000000 +#define _FPU_RC_UP 0x80000000 +#define _FPU_RC_ZERO 0x40000000 +#define _FPU_RC_NEAREST 0x0 /* RECOMMENDED */ + +#define _FPU_RESERVED 0x30300000 /* Reserved bits in cw */ + + +/* Now two recommended cw */ + +/* Linux default: + - extended precision + - rounding to nearest + - no exceptions */ +#define _FPU_DEFAULT 0x0 + +/* IEEE: same as above */ +#define _FPU_IEEE 0x0 + +/* Type of the control word. */ +typedef unsigned long fpu_control_t; + +#define _FPU_GETCW(cw) __asm__ ("stx %%fsr,%0" : "=m" (*&cw)) +#define _FPU_SETCW(cw) __asm__ ("ldx %0,%%fsr" : : "m" (*&cw)) + +/* Default control word set at startup. */ +extern fpu_control_t __fpu_control; + +__BEGIN_DECLS + +/* Called at startup. It can be used to manipulate fpu control register. */ +extern void __setfpucw __P ((fpu_control_t)); + +__END_DECLS + +#endif /* fpu_control.h */ |