| Age | Commit message (Collapse) | Author | Lines |
|---|
| 2013年10月07日 | math: fix rare underflow issue in fma | Szabolcs Nagy | -2/+14 |
|
the issue is described in commits 1e5eb73545ca6cfe8b918798835aaf6e07af5beb
and ffd8ac2dd50f99c3c83d7d9d845df9874ec3e7d5
|
| 2013年09月05日 | math: fix remaining old long double code (erfl, fmal, lgammal, scalbnl) | Szabolcs Nagy | -14/+16 |
|
in lgammal don't handle 1 and 2 specially, in fma use the new ldshape
union instead of ld80 one.
|
| 2013年05月19日 | math: add fma TODO comments about the underflow issue | Szabolcs Nagy | -0/+2 |
|
The underflow exception is not raised correctly in some
cornercases (see previous fma commit), added comments
with examples for fmaf, fmal and non-x86 fma.
In fmaf store the result before returning so it has the
correct precision when FLT_EVAL_METHOD!=0
|
| 2012年11月13日 | math: use '#pragma STDC FENV_ACCESS ON' when fenv is accessed | Szabolcs Nagy | -0/+1 |
|
| 2012年03月19日 | use scalbn or *2.0 instead of ldexp, fix fmal | nsz | -6/+6 |
|
Some code assumed ldexp(x, 1) is faster than 2.0*x,
but ldexp is a wrapper around scalbn which uses
multiplications inside, so this optimization is
wrong.
This commit also fixes fmal which accidentally
used ldexp instead of ldexpl loosing precision.
There are various additional changes from the
work-in-progress const cleanups.
|
| 2012年03月19日 | fmal bug fix: nan input should not raise exception | nsz | -4/+4 |
|
| 2012年03月16日 | make fma and lrint functions build without full fenv support | Rich Felker | -2/+12 |
|
this is necessary to support archs where fenv is incomplete or
unavailable (presently arm). fma, fmal, and the lrint family should
work perfectly fine with this change; fmaf is slightly broken with
respect to rounding as it depends on non-default rounding modes to do
its work.
|
| 2012年03月13日 | first commit of the new libm! | Rich Felker | -0/+266 |
|
thanks to the hard work of Szabolcs Nagy (nsz), identifying the best
(from correctness and license standpoint) implementations from freebsd
and openbsd and cleaning them up! musl should now fully support c99
float and long double math functions, and has near-complete complex
math support. tgmath should also work (fully on gcc-compatible
compilers, and mostly on any c99 compiler).
based largely on commit 0376d44a890fea261506f1fc63833e7a686dca19 from
nsz's libm git repo, with some additions (dummy versions of a few
missing long double complex functions, etc.) by me.
various cleanups still need to be made, including re-adding (if
they're correct) some asm functions that were dropped.
|