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60 lines
2.5 KiB
C
60 lines
2.5 KiB
C
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/* Inline floating-point environment handling functions for powerpc.
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Copyright (C) 1995, 1996, 1997, 1998, 1999 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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#if defined __GNUC__ && !defined _SOFT_FLOAT && !defined __NO_MATH_INLINES
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/* Inline definition for fegetround. */
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# define fegetround() \
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(__extension__ ({ int __fegetround_result; \
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__asm__ ("mcrfs 7,7 ; mfcr %0" \
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: "=r"(__fegetround_result) : : "cr7"); \
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__fegetround_result & 3; }))
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/* The weird 'i#*X' constraints on the following suppress a gcc
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warning when __excepts is not a constant. Otherwise, they mean the
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same as just plain 'i'. */
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/* Inline definition for feraiseexcept. */
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# define feraiseexcept(__excepts) \
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((__builtin_constant_p (__excepts) \
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&& ((__excepts) & ((__excepts)-1)) == 0 \
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&& (__excepts) != FE_INVALID) \
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? ((__excepts) != 0 \
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? (__extension__ ({ __asm__ __volatile__ \
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("mtfsb1 %s0" \
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: : "i#*X"(__builtin_ffs (__excepts))); \
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(void)0; })) \
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: (void)0) \
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: (feraiseexcept) (__excepts))
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/* Inline definition for feclearexcept. */
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# define feclearexcept(__excepts) \
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((__builtin_constant_p (__excepts) \
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&& ((__excepts) & ((__excepts)-1)) == 0 \
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&& (__excepts) != FE_INVALID) \
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? ((__excepts) != 0 \
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? (__extension__ ({ __asm__ __volatile__ \
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("mtfsb0 %s0" \
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: : "i#*X"(__builtin_ffs (__excepts))); \
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(void)0; })) \
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: (void)0) \
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: (feclearexcept) (__excepts))
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#endif /* __GNUC__ && !_SOFT_FLOAT */
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