From 81ec6b6b473e3989023b827aba390548fd6a5bb8 Mon Sep 17 00:00:00 2001 From: Ed Schouten Date: Fri, 6 Jan 2012 16:20:17 +0000 Subject: [PATCH] Add an even faster implementation of for the future. Instead of using an exponential number of cases with respect to the number of arguments, this version only uses a linear number. Unfortunately, it works with Clang, GCC 4.6 and GCC 4.7, but not GCC 4.2. Therefore, leave it commented out. --- include/tgmath.h | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/include/tgmath.h b/include/tgmath.h index 372274f5e162..9de0afe4248b 100644 --- a/include/tgmath.h +++ b/include/tgmath.h @@ -59,6 +59,25 @@ #error " not implemented for this compiler" #endif +#if 0 /* XXX: Much shorter and faster to compile, but broken with GCC 4.2. */ +#define __tg_generic(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, long double, fnl, \ + __generic(x, float, fnf, fn))))) +#define __tg_type(x) \ + __tg_generic(x, (long double _Complex)0, (double _Complex)0, \ + (float _Complex)0, (long double)0, (double)0, (float)0) +#define __tg_impl_simple(x, y, z, fnl, fn, fnf, ...) \ + __tg_generic( \ + __tg_type(x) + __tg_type(y) + __tg_type(z), \ + fnl, fn, fnf, fnl, fn, fnf)(__VA_ARGS__) +#define __tg_impl_full(x, y, cfnl, cfn, cfnf, fnl, fn, fnf, ...) \ + __tg_generic( \ + __tg_type(x) + __tg_type(y), \ + cfnl, cfn, cfnf, fnl, fn, fnf)(__VA_ARGS__) +#else #define __tg_generic_simple(x, fnl, fn, fnf) \ __generic(x, long double _Complex, fnl, \ __generic(x, double _Complex, fn, \ @@ -94,6 +113,7 @@ __tg_generic_full(y, cfnl, cfn , cfn , fnl , fn , fn ), \ __tg_generic_full(y, cfnl, cfn , cfnf, fnl , fn , fnf )) \ (__VA_ARGS__) +#endif /* Macros to save lots of repetition below */ #define __tg_simple(x, fn) \