diff options
| -rw-r--r-- | include/tgmath.h | 111 | ||||
| -rw-r--r-- | share/man/man3/tgmath.3 | 21 |
2 files changed, 81 insertions, 51 deletions
diff --git a/include/tgmath.h b/include/tgmath.h index 7ff8dd4..9673dd4 100644 --- a/include/tgmath.h +++ b/include/tgmath.h @@ -2,6 +2,9 @@ * Copyright (c) 2004 Stefan Farfeleder. * All rights reserved. * + * Copyright (c) 2012 Ed Schouten <ed@FreeBSD.org> + * All rights reserved. + * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: @@ -33,64 +36,83 @@ #include <math.h> /* - * This implementation of <tgmath.h> requires two implementation-dependent - * macros to be defined: - * __tg_impl_simple(x, y, z, fn, fnf, fnl, ...) + * This implementation of <tgmath.h> uses the two following macros, + * which are based on the macros described in C11 proposal N1404: + * __tg_impl_simple(x, y, z, fnl, fn, fnf, ...) * Invokes fnl() if the corresponding real type of x, y or z is long * double, fn() if it is double or any has an integer type, and fnf() * otherwise. - * __tg_impl_full(x, y, z, fn, fnf, fnl, cfn, cfnf, cfnl, ...) - * Invokes [c]fnl() if the corresponding real type of x, y or z is long + * __tg_impl_full(x, y, cfnl, cfn, cfnf, fnl, fn, fnf, ...) + * Invokes [c]fnl() if the corresponding real type of x or y is long * double, [c]fn() if it is double or any has an integer type, and * [c]fnf() otherwise. The function with the 'c' prefix is called if - * any of x, y or z is a complex number. + * any of x or y is a complex number. * Both macros call the chosen function with all additional arguments passed * to them, as given by __VA_ARGS__. * * Note that these macros cannot be implemented with C's ?: operator, * because the return type of the whole expression would incorrectly be long * double complex regardless of the argument types. + * + * The _Complex_I distinction should not be needed, but due to a bug in + * GCC 4.2, _Complex_I is not of type float _Complex. */ -#if __GNUC_PREREQ__(3, 1) -#define __tg_type(e, t) __builtin_types_compatible_p(__typeof__(e), t) -#define __tg_type3(e1, e2, e3, t) \ - (__tg_type(e1, t) || __tg_type(e2, t) || __tg_type(e3, t)) -#define __tg_type_corr(e1, e2, e3, t) \ - (__tg_type3(e1, e2, e3, t) || __tg_type3(e1, e2, e3, t _Complex)) -#define __tg_integer(e1, e2, e3) \ - (((__typeof__(e1))1.5 == 1) || ((__typeof__(e2))1.5 == 1) || \ - ((__typeof__(e3))1.5 == 1)) -#define __tg_is_complex(e1, e2, e3) \ - (__tg_type3(e1, e2, e3, float _Complex) || \ - __tg_type3(e1, e2, e3, double _Complex) || \ - __tg_type3(e1, e2, e3, long double _Complex) || \ - __tg_type3(e1, e2, e3, __typeof__(_Complex_I))) - -#define __tg_impl_simple(x, y, z, fn, fnf, fnl, ...) \ - __builtin_choose_expr(__tg_type_corr(x, y, z, long double), \ - fnl(__VA_ARGS__), __builtin_choose_expr( \ - __tg_type_corr(x, y, z, double) || __tg_integer(x, y, z),\ - fn(__VA_ARGS__), fnf(__VA_ARGS__))) - -#define __tg_impl_full(x, y, z, fn, fnf, fnl, cfn, cfnf, cfnl, ...) \ - __builtin_choose_expr(__tg_is_complex(x, y, z), \ - __tg_impl_simple(x, y, z, cfn, cfnf, cfnl, __VA_ARGS__), \ - __tg_impl_simple(x, y, z, fn, fnf, fnl, __VA_ARGS__)) - -#else /* __GNUC__ */ +#ifndef __generic #error "<tgmath.h> not implemented for this compiler" -#endif /* !__GNUC__ */ +#endif + +#define __tg_generic_simple(x, fnl, fn, fnf) \ + __generic(x, long double _Complex, fnl, \ + __generic(x, double _Complex, fn, \ + __generic(x, float _Complex, fnf, \ + __generic(x, __typeof(_Complex_I), fnf, \ + __generic(x, long double, fnl, \ + __generic(x, float, fnf, fn)))))) +#define __tg_impl_simple(x, y, z, fnl, fn, fnf, ...) \ + __tg_generic_simple(x, \ + __tg_generic_simple(y, \ + __tg_generic_simple(z, fnl, fnl, fnl), \ + __tg_generic_simple(z, fnl, fnl, fnl), \ + __tg_generic_simple(z, fnl, fnl, fnl)), \ + __tg_generic_simple(y, \ + __tg_generic_simple(z, fnl, fnl, fnl), \ + __tg_generic_simple(z, fnl, fn , fn ), \ + __tg_generic_simple(z, fnl, fn , fn )), \ + __tg_generic_simple(y, \ + __tg_generic_simple(z, fnl, fnl, fnl), \ + __tg_generic_simple(z, fnl, fn , fn ), \ + __tg_generic_simple(z, fnl, fn , fnf)))(__VA_ARGS__) +#define __tg_generic_full(x, cfnl, cfn, cfnf, fnl, fn, fnf) \ + __generic(x, long double _Complex, cfnl, \ + __generic(x, double _Complex, cfn, \ + __generic(x, float _Complex, cfnf, \ + __generic(x, __typeof(_Complex_I), cfnf, \ + __generic(x, long double, fnl, \ + __generic(x, float, fnf, fn)))))) +#define __tg_impl_full(x, y, cfnl, cfn, cfnf, fnl, fn, fnf, ...) \ + __tg_generic_full(x, \ + __tg_generic_full(y, cfnl, cfnl, cfnl, cfnl, cfnl, cfnl), \ + __tg_generic_full(y, cfnl, cfn , cfn , cfnl, cfn , cfn ), \ + __tg_generic_full(y, cfnl, cfn , cfnf, cfnl, cfn , cfnf), \ + __tg_generic_full(y, cfnl, cfnl, cfnl, fnl , fnl , fnl ), \ + __tg_generic_full(y, cfnl, cfn , cfn , fnl , fn , fn ), \ + __tg_generic_full(y, cfnl, cfn , cfnf, fnl , fn , fnf )) \ + (__VA_ARGS__) /* Macros to save lots of repetition below */ #define __tg_simple(x, fn) \ - __tg_impl_simple(x, x, x, fn, fn##f, fn##l, x) + __tg_impl_simple(x, x, x, fn##l, fn, fn##f, x) #define __tg_simple2(x, y, fn) \ - __tg_impl_simple(x, x, y, fn, fn##f, fn##l, x, y) + __tg_impl_simple(x, x, y, fn##l, fn, fn##f, x, y) +#define __tg_simple3(x, y, z, fn) \ + __tg_impl_simple(x, y, z, fn##l, fn, fn##f, x, y, z) #define __tg_simplev(x, fn, ...) \ - __tg_impl_simple(x, x, x, fn, fn##f, fn##l, __VA_ARGS__) + __tg_impl_simple(x, x, x, fn##l, fn, fn##f, __VA_ARGS__) #define __tg_full(x, fn) \ - __tg_impl_full(x, x, x, fn, fn##f, fn##l, c##fn, c##fn##f, c##fn##l, x) + __tg_impl_full(x, x, c##fn##l, c##fn, c##fn##f, fn##l, fn, fn##f, x) +#define __tg_full2(x, y, fn) \ + __tg_impl_full(x, y, c##fn##l, c##fn, c##fn##f, fn##l, fn, fn##f, x, y) /* 7.22#4 -- These macros expand to real or complex functions, depending on * the type of their arguments. */ @@ -108,13 +130,12 @@ #define tanh(x) __tg_full(x, tanh) #define exp(x) __tg_full(x, exp) #define log(x) __tg_full(x, log) -#define pow(x, y) __tg_impl_full(x, x, y, pow, powf, powl, \ - cpow, cpowf, cpowl, x, y) +#define pow(x, y) __tg_full2(x, y, pow) #define sqrt(x) __tg_full(x, sqrt) /* "The corresponding type-generic macro for fabs and cabs is fabs." */ -#define fabs(x) __tg_impl_full(x, x, x, fabs, fabsf, fabsl, \ - cabs, cabsf, cabsl, x) +#define fabs(x) __tg_impl_full(x, x, cabsl, cabs, cabsf, \ + fabsl, fabs, fabsf, x) /* 7.22#5 -- These macros are only defined for arguments with real type. */ #define atan2(x, y) __tg_simple2(x, y, atan2) @@ -127,7 +148,7 @@ #define expm1(x) __tg_simple(x, expm1) #define fdim(x, y) __tg_simple2(x, y, fdim) #define floor(x) __tg_simple(x, floor) -#define fma(x, y, z) __tg_impl_simple(x, y, z, fma, fmaf, fmal, x, y, z) +#define fma(x, y, z) __tg_simple3(x, y, z, fma) #define fmax(x, y) __tg_simple2(x, y, fmax) #define fmin(x, y) __tg_simple2(x, y, fmin) #define fmod(x, y) __tg_simple2(x, y, fmod) @@ -148,8 +169,8 @@ #define nextafter(x, y) __tg_simple2(x, y, nextafter) #define nexttoward(x, y) __tg_simplev(x, nexttoward, x, y) #define remainder(x, y) __tg_simple2(x, y, remainder) -#define remquo(x, y, z) __tg_impl_simple(x, x, y, remquo, remquof, \ - remquol, x, y, z) +#define remquo(x, y, z) __tg_impl_simple(x, x, y, remquol, remquo, \ + remquof, x, y, z) #define rint(x) __tg_simple(x, rint) #define round(x) __tg_simple(x, round) #define scalbn(x, y) __tg_simplev(x, scalbn, x, y) diff --git a/share/man/man3/tgmath.3 b/share/man/man3/tgmath.3 index f8faf26..e86b141 100644 --- a/share/man/man3/tgmath.3 +++ b/share/man/man3/tgmath.3 @@ -24,7 +24,7 @@ .\" .\" $FreeBSD$ .\" -.Dd August 14, 2004 +.Dd January 4, 2012 .Dt TGMATH 3 .Os .Sh NAME @@ -139,15 +139,24 @@ The header .In tgmath.h first appeared in .Fx 5.3 . -.Sh BUGS -The header +.Sh COMPILER SUPPORT +Before +.St -isoC-11 , +the header .In tgmath.h -cannot be implemented with strictly conforming C code and needs +could not be implemented with strictly conforming C code and needed special compiler support. -The current implementation only works for GCC. -.Pp +As of +.St -isoC-11 , +this header file can be implemented using the +.Fn _Generic +language keyword. +In addition to compilers that support this keyword, this header file +works with GCC. +.Sh BUGS Many of the functions mentioned here are not prototyped in .In math.h or .In complex.h as they are not yet implemented. +This prevents the corresponding type-generic macro from working at all. |
