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49 lines
1.8 KiB
C
49 lines
1.8 KiB
C
/* FPU control word definitions. Stub version.
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Copyright (C) 1996, 1997 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#ifndef _FPU_CONTROL_H
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#define _FPU_CONTROL_H
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#define _FPU_RESERVED 0xffffffff /* These bits are reserved. */
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/* The fdlibm code requires no interrupts for exceptions. Don't
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change the rounding mode, it would break long double I/O! */
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#define _FPU_DEFAULT 0x00000000 /* Default value. */
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/* Type of the control word. */
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typedef unsigned int fpu_control_t;
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/* Macros for accessing the hardware control word.
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* On the ARM, we can't do this from user mode (it would trap).
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*/
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#define _FPU_GETCW(cw) __asm__ ("movnv r0,r0" : "=g" (cw))
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#define _FPU_SETCW(cw) __asm__ ("movnv r0,r0" : : "g" (cw))
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/* Default control word set at startup. */
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extern fpu_control_t __fpu_control;
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__BEGIN_DECLS
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/* Called at startup. It can be used to manipulate fpu control register. */
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extern void __setfpucw __P ((fpu_control_t));
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__END_DECLS
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#endif /* _FPU_CONTROL_H */
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