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151 lines
3.7 KiB
C
151 lines
3.7 KiB
C
/* Inline math functions for Alpha.
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Copyright (C) 1996, 1997, 1999-2001, 2004, 2007
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Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by David Mosberger-Tang.
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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, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#ifndef _MATH_H
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# error "Never use <bits/mathinline.h> directly; include <math.h> instead."
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#endif
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#ifndef __extern_inline
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# define __MATH_INLINE __inline
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#else
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# define __MATH_INLINE __extern_inline
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#endif
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#if defined __USE_ISOC99 && defined __GNUC__ && !__GNUC_PREREQ(3,0)
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# undef isgreater
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# undef isgreaterequal
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# undef isless
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# undef islessequal
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# undef islessgreater
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# undef isunordered
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# define isunordered(u, v) \
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(__extension__ \
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({ double __r, __u = (u), __v = (v); \
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__asm ("cmptun/su %1,%2,%0\n\ttrapb" \
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: "=&f" (__r) : "f" (__u), "f"(__v)); \
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__r != 0; }))
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#endif /* ISO C99 */
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#if (!defined __NO_MATH_INLINES || defined __LIBC_INTERNAL_MATH_INLINES) \
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&& defined __OPTIMIZE__
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#if !__GNUC_PREREQ (4, 0)
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# define __inline_copysign(NAME, TYPE) \
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__MATH_INLINE TYPE \
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__NTH (NAME (TYPE __x, TYPE __y)) \
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{ \
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TYPE __z; \
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__asm ("cpys %1, %2, %0" : "=f" (__z) : "f" (__y), "f" (__x)); \
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return __z; \
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}
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__inline_copysign (__copysignf, float)
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__inline_copysign (copysignf, float)
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__inline_copysign (__copysign, double)
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__inline_copysign (copysign, double)
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# undef __inline_copysign
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#endif
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#if !__GNUC_PREREQ (2, 8)
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# define __inline_fabs(NAME, TYPE) \
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__MATH_INLINE TYPE \
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__NTH (NAME (TYPE __x)) \
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{ \
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TYPE __z; \
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__asm ("cpys $f31, %1, %0" : "=f" (__z) : "f" (__x)); \
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return __z; \
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}
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__inline_fabs (__fabsf, float)
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__inline_fabs (fabsf, float)
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__inline_fabs (__fabs, double)
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__inline_fabs (fabs, double)
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# undef __inline_fabs
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#endif
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#ifdef __USE_ISOC99
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/* Test for negative number. Used in the signbit() macro. */
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__MATH_INLINE int
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__NTH (__signbitf (float __x))
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{
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#if !__GNUC_PREREQ (4, 0)
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__extension__ union { float __f; int __i; } __u = { __f: __x };
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return __u.__i < 0;
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#else
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return __builtin_signbitf (__x);
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#endif
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}
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__MATH_INLINE int
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__NTH (__signbit (double __x))
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{
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#if !__GNUC_PREREQ (4, 0)
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__extension__ union { double __d; long __i; } __u = { __d: __x };
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return __u.__i < 0;
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#else
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return __builtin_signbit (__x);
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#endif
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}
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__MATH_INLINE int
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__NTH (__signbitl (long double __x))
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{
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#if !__GNUC_PREREQ (4, 0)
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__extension__ union {
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long double __d;
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long __i[sizeof(long double)/sizeof(long)];
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} __u = { __d: __x };
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return __u.__i[sizeof(long double)/sizeof(long) - 1] < 0;
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#else
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return __builtin_signbitl (__x);
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#endif
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}
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/* Test for NaN. Used in the isnan() macro. */
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__MATH_INLINE int
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__NTH (__isnanf (float __x))
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{
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return isunordered (__x, __x);
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}
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__MATH_INLINE int
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__NTH (__isnan (double __x))
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{
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return isunordered (__x, __x);
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}
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#ifndef __NO_LONG_DOUBLE_MATH
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__MATH_INLINE int
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__NTH (__isnanl (long double __x))
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{
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return isunordered (__x, __x);
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}
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#endif
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#endif /* C99 */
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#endif /* __NO_MATH_INLINES */
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