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44 lines
1.6 KiB
C
44 lines
1.6 KiB
C
/* FPU control word definitions. Stub version.
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Copyright (C) 2000-2016 Free Software Foundation, Inc.
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Contributed by Denis Joseph Barrow (djbarrow@de.ibm.com) and
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Martin Schwidefsky (schwidefsky@de.ibm.com).
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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 Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the 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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _FPU_CONTROL_H
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#define _FPU_CONTROL_H
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#include <features.h>
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/* These bits are reserved are not changed. */
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#define _FPU_RESERVED 0x0707FFFC
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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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#define _FPU_GETCW(cw) __asm__ __volatile__ ("efpc %0,0" : "=d" (cw))
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#define _FPU_SETCW(cw) __asm__ __volatile__ ("sfpc %0,0" : : "d" (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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#endif /* _FPU_CONTROL_H */
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