Date: Fri, 9 Jul 2004 03:31:10 +0000 (UTC) From: David Schultz <das@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/lib/msun/src math.h Message-ID: <200407090331.i693VAIL038494@repoman.freebsd.org>
next in thread | raw e-mail | index | archive | help
das 2004-07-09 03:31:09 UTC
FreeBSD src repository
Modified files:
lib/msun/src math.h
Log:
Define the following macros in terms of [gi]cc builtins when the
builtins are available: HUGE_VAL, HUGE_VALF, HUGE_VALL, INFINITY,
and NAN. These macros now expand to floating-point constant
expressions rather than external references, as required by C99.
Other compilers will retain the historical behavior. Note that
it is not possible say, e.g.
#define HUGE_VAL 1.0e9999
because the above may result in diagnostics at translation time
and spurious exceptions at runtime. Hence the need for compiler
support for these features.
Also use builtins to implement the macros isgreater(),
isgreaterequal(), isless(), islessequal(), islessgreater(),
and isunordered() when such builtins are available.
Although the old macros are correct, the builtin versions
are much faster, and they avoid double-expansion problems.
Revision Changes Path
1.39 +29 -0 src/lib/msun/src/math.h
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200407090331.i693VAIL038494>