Date: Fri, 6 Jan 2012 16:20:17 +0000 (UTC) From: Ed Schouten <ed@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r229704 - head/include Message-ID: <201201061620.q06GKHx3097121@svn.freebsd.org>
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Author: ed Date: Fri Jan 6 16:20:17 2012 New Revision: 229704 URL: http://svn.freebsd.org/changeset/base/229704 Log: Add an even faster implementation of <tgmath.h> 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. Modified: head/include/tgmath.h Modified: head/include/tgmath.h ============================================================================== --- head/include/tgmath.h Fri Jan 6 15:07:28 2012 (r229703) +++ head/include/tgmath.h Fri Jan 6 16:20:17 2012 (r229704) @@ -59,6 +59,25 @@ #error "<tgmath.h> 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) \
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