Date: Wed, 2 Nov 2005 13:06:49 +0000 (UTC) From: Bruce Evans <bde@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/lib/msun/src k_sin.c Message-ID: <200511021306.jA2D6n79076814@repoman.freebsd.org>
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bde 2005-11-02 13:06:49 UTC
FreeBSD src repository
Modified files:
lib/msun/src k_sin.c
Log:
Updated the comment about the optimization for tiny x (the previous
commit moved it). This includes a comment that the "kernel" sine no
longer works on arg -0, so callers must now handle this case. The kernel
sine still works on all other tiny args; without the optimization it is
just a little slower on these args. I intended it to keep working on
all tiny args, but that seems to be impossible without losing efficiency
or accuracy. (sin(x) ~ x * (1 + S1*x**2 + ...) would preserve -0, but
the approximation must be written as x + S1*x**3 + ... for accuracy.)
Revision Changes Path
1.10 +4 -2 src/lib/msun/src/k_sin.c
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