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| /freebsd-11.0-release/lib/msun/src/ | ||
| H A D | k_sin.c | diff 151966 Wed Nov 02 13:06:49 MST 2005 bde 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.) |
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