diff options
Diffstat (limited to 'math/math.h')
| -rw-r--r-- | math/math.h | 50 |
1 files changed, 41 insertions, 9 deletions
diff --git a/math/math.h b/math/math.h index c5115d7982..4724b10b6f 100644 --- a/math/math.h +++ b/math/math.h @@ -1,5 +1,5 @@ /* Declarations for math functions. - Copyright (C) 1991-2015 Free Software Foundation, Inc. + Copyright (C) 1991-2016 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -77,6 +77,7 @@ __BEGIN_DECLS #define _Mdouble_ double #define __MATH_PRECNAME(name,r) __CONCAT(name,r) +#define __MATH_DECLARING_DOUBLE 1 #define _Mdouble_BEGIN_NAMESPACE __BEGIN_NAMESPACE_STD #define _Mdouble_END_NAMESPACE __END_NAMESPACE_STD #include <bits/mathcalls.h> @@ -84,6 +85,7 @@ __BEGIN_DECLS #undef _Mdouble_BEGIN_NAMESPACE #undef _Mdouble_END_NAMESPACE #undef __MATH_PRECNAME +#undef __MATH_DECLARING_DOUBLE #ifdef __USE_ISOC99 @@ -96,6 +98,7 @@ __BEGIN_DECLS # endif # define _Mdouble_ _Mfloat_ # define __MATH_PRECNAME(name,r) name##f##r +# define __MATH_DECLARING_DOUBLE 0 # define _Mdouble_BEGIN_NAMESPACE __BEGIN_NAMESPACE_C99 # define _Mdouble_END_NAMESPACE __END_NAMESPACE_C99 # include <bits/mathcalls.h> @@ -103,6 +106,7 @@ __BEGIN_DECLS # undef _Mdouble_BEGIN_NAMESPACE # undef _Mdouble_END_NAMESPACE # undef __MATH_PRECNAME +# undef __MATH_DECLARING_DOUBLE # if !(defined __NO_LONG_DOUBLE_MATH && defined _LIBC) \ || defined __LDBL_COMPAT \ @@ -140,6 +144,7 @@ extern long double __REDIRECT_NTH (nexttowardl, # endif # define _Mdouble_ _Mlong_double_ # define __MATH_PRECNAME(name,r) name##l##r +# define __MATH_DECLARING_DOUBLE 0 # define _Mdouble_BEGIN_NAMESPACE __BEGIN_NAMESPACE_C99 # define _Mdouble_END_NAMESPACE __END_NAMESPACE_C99 # define __MATH_DECLARE_LDOUBLE 1 @@ -148,6 +153,7 @@ extern long double __REDIRECT_NTH (nexttowardl, # undef _Mdouble_BEGIN_NAMESPACE # undef _Mdouble_END_NAMESPACE # undef __MATH_PRECNAME +# undef __MATH_DECLARING_DOUBLE # endif /* !(__NO_LONG_DOUBLE_MATH && _LIBC) || __LDBL_COMPAT */ @@ -219,8 +225,16 @@ enum FP_NORMAL }; +/* GCC bug 66462 means we cannot use the math builtins with -fsignaling-nan, + so disable builtins if this is enabled. When fixed in a newer GCC, + the __SUPPORT_SNAN__ check may be skipped for those versions. */ + /* Return number of classification appropriate for X. */ -# ifdef __NO_LONG_DOUBLE_MATH +# if __GNUC_PREREQ (4,4) && !defined __SUPPORT_SNAN__ \ + && !defined __OPTIMIZE_SIZE__ +# define fpclassify(x) __builtin_fpclassify (FP_NAN, FP_INFINITE, \ + FP_NORMAL, FP_SUBNORMAL, FP_ZERO, x) +# elif defined __NO_LONG_DOUBLE_MATH # define fpclassify(x) \ (sizeof (x) == sizeof (float) ? __fpclassifyf (x) : __fpclassify (x)) # else @@ -232,19 +246,29 @@ enum # endif /* Return nonzero value if sign of X is negative. */ -# ifdef __NO_LONG_DOUBLE_MATH +# if __GNUC_PREREQ (4,0) # define signbit(x) \ - (sizeof (x) == sizeof (float) ? __signbitf (x) : __signbit (x)) + (sizeof (x) == sizeof (float) \ + ? __builtin_signbitf (x) \ + : sizeof (x) == sizeof (double) \ + ? __builtin_signbit (x) : __builtin_signbitl (x)) # else -# define signbit(x) \ +# ifdef __NO_LONG_DOUBLE_MATH +# define signbit(x) \ + (sizeof (x) == sizeof (float) ? __signbitf (x) : __signbit (x)) +# else +# define signbit(x) \ (sizeof (x) == sizeof (float) \ ? __signbitf (x) \ : sizeof (x) == sizeof (double) \ ? __signbit (x) : __signbitl (x)) +# endif # endif /* Return nonzero value if X is not +-Inf or NaN. */ -# ifdef __NO_LONG_DOUBLE_MATH +# if __GNUC_PREREQ (4,4) && !defined __SUPPORT_SNAN__ +# define isfinite(x) __builtin_isfinite (x) +# elif defined __NO_LONG_DOUBLE_MATH # define isfinite(x) \ (sizeof (x) == sizeof (float) ? __finitef (x) : __finite (x)) # else @@ -256,11 +280,17 @@ enum # endif /* Return nonzero value if X is neither zero, subnormal, Inf, nor NaN. */ -# define isnormal(x) (fpclassify (x) == FP_NORMAL) +# if __GNUC_PREREQ (4,4) && !defined __SUPPORT_SNAN__ +# define isnormal(x) __builtin_isnormal (x) +# else +# define isnormal(x) (fpclassify (x) == FP_NORMAL) +# endif /* Return nonzero value if X is a NaN. We could use `fpclassify' but we already have this functions `__isnan' and it is faster. */ -# ifdef __NO_LONG_DOUBLE_MATH +# if __GNUC_PREREQ (4,4) && !defined __SUPPORT_SNAN__ +# define isnan(x) __builtin_isnan (x) +# elif defined __NO_LONG_DOUBLE_MATH # define isnan(x) \ (sizeof (x) == sizeof (float) ? __isnanf (x) : __isnan (x)) # else @@ -272,7 +302,9 @@ enum # endif /* Return nonzero value if X is positive or negative infinity. */ -# ifdef __NO_LONG_DOUBLE_MATH +# if __GNUC_PREREQ (4,4) && !defined __SUPPORT_SNAN__ +# define isinf(x) __builtin_isinf_sign (x) +# elif defined __NO_LONG_DOUBLE_MATH # define isinf(x) \ (sizeof (x) == sizeof (float) ? __isinff (x) : __isinf (x)) # else |