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/* Inline math functions for Alpha.
Copyright (C) 1996, 1997, 1999-2001, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by David Mosberger-Tang.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#ifndef _MATH_H
# error "Never use <bits/mathinline.h> directly; include <math.h> instead."
#endif
#ifdef __cplusplus
# define __MATH_INLINE __inline
#else
# define __MATH_INLINE extern __inline
#endif
#if defined __USE_ISOC99 && defined __GNUC__ && !__GNUC_PREREQ(3,0)
# undef isgreater
# undef isgreaterequal
# undef isless
# undef islessequal
# undef islessgreater
# undef isunordered
# define isunordered(u, v) \
(__extension__ \
({ double __r, __u = (u), __v = (v); \
__asm__ ("cmptun/su %1,%2,%0\n\ttrapb" \
: "=&f" (__r) : "f" (__u), "f"(__v)); \
__r != 0; }))
#endif /* ISO C99 */
#if (!defined __NO_MATH_INLINES || defined __LIBC_INTERNAL_MATH_INLINES) \
&& defined __OPTIMIZE__
#if !__GNUC_PREREQ (4, 0)
# define __inline_copysign(NAME, TYPE) \
__MATH_INLINE TYPE \
__NTH (NAME (TYPE __x, TYPE __y)) \
{ \
TYPE __z; \
__asm__ ("cpys %1, %2, %0" : "=f" (__z) : "f" (__y), "f" (__x)); \
return __z; \
}
__inline_copysign (__copysignf, float)
__inline_copysign (copysignf, float)
__inline_copysign (__copysign, double)
__inline_copysign (copysign, double)
# undef __inline_copysign
#endif
#if !__GNUC_PREREQ (2, 8)
# define __inline_fabs(NAME, TYPE) \
__MATH_INLINE TYPE \
__NTH (NAME (TYPE __x)) \
{ \
TYPE __z; \
__asm__ ("cpys $f31, %1, %0" : "=f" (__z) : "f" (__x)); \
return __z; \
}
__inline_fabs (__fabsf, float)
__inline_fabs (fabsf, float)
__inline_fabs (__fabs, double)
__inline_fabs (fabs, double)
# undef __inline_fabs
#endif
/* Use the -inf rounding mode conversion instructions to implement
floor. We note when the exponent is large enough that the value
must be integral, as this avoids unpleasant integer overflows. */
__MATH_INLINE float
__NTH (__floorf (float __x))
{
/* Check not zero since floor(-0) == -0. */
if (__x != 0 && fabsf (__x) < 16777216.0f) /* 1 << FLT_MANT_DIG */
{
/* Note that Alpha S_Floating is stored in registers in a
restricted T_Floating format, so we don't even need to
convert back to S_Floating in the end. The initial
conversion to T_Floating is needed to handle denormals. */
float __tmp1, __tmp2;
__asm__ ("cvtst/s %3,%2\n\t"
#ifdef _IEEE_FP_INEXACT
"cvttq/svim %2,%1\n\t"
#else
"cvttq/svm %2,%1\n\t"
#endif
"cvtqt/m %1,%0\n\t"
: "=f"(__x), "=&f"(__tmp1), "=&f"(__tmp2)
: "f"(__x));
}
return __x;
}
__MATH_INLINE double
__NTH (__floor (double __x))
{
if (__x != 0 && fabs (__x) < 9007199254740992.0) /* 1 << DBL_MANT_DIG */
{
double __tmp1;
__asm__ (
#ifdef _IEEE_FP_INEXACT
"cvttq/svim %2,%1\n\t"
#else
"cvttq/svm %2,%1\n\t"
#endif
"cvtqt/m %1,%0\n\t"
: "=f"(__x), "=&f"(__tmp1)
: "f"(__x));
}
return __x;
}
__MATH_INLINE float __NTH (floorf (float __x)) { return __floorf(__x); }
__MATH_INLINE double __NTH (floor (double __x)) { return __floor(__x); }
#ifdef __USE_ISOC99
__MATH_INLINE float
__NTH (__fdimf (float __x, float __y))
{
return __x <= __y ? 0.0f : __x - __y;
}
__MATH_INLINE float
__NTH (fdimf (float __x, float __y))
{
return __x <= __y ? 0.0f : __x - __y;
}
__MATH_INLINE double
__NTH (__fdim (double __x, double __y))
{
return __x <= __y ? 0.0 : __x - __y;
}
__MATH_INLINE double
__NTH (fdim (double __x, double __y))
{
return __x <= __y ? 0.0 : __x - __y;
}
/* Test for negative number. Used in the signbit() macro. */
__MATH_INLINE int
__NTH (__signbitf (float __x))
{
__extension__ union { float __f; int __i; } __u = { __f: __x };
return __u.__i < 0;
}
__MATH_INLINE int
__NTH (__signbit (double __x))
{
__extension__ union { double __d; long __i; } __u = { __d: __x };
return __u.__i < 0;
}
#endif /* C99 */
#endif /* __NO_MATH_INLINES */
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