musl/src/math/exp2l.c, branch master

math: add ld128 exp2l based on the freebsd implementation

2015年03月11日T22:54:50+00:00

Changed the special case handling and bit manipulation to better
match the double version.

math: fix underflow in exp*.c and long double handling in exp2l

2013年09月05日T11:30:08+00:00

* don't care about inexact flag
* use double_t and float_t (faster, smaller, more precise on x86)
* exp: underflow when result is zero or subnormal and not -inf
* exp2: underflow when result is zero or subnormal and not exact
* expm1: underflow when result is zero or subnormal
* expl: don't underflow on -inf
* exp2: fix incorrect comment
* expm1: simplify special case handling and overflow properly
* expm1: cleanup final scaling and fix negative left shift ub (twopk)

math: cleanup exp2.c exp2f.c and exp2l.c

2012年11月17日T22:39:39+00:00

* old code relied on sign extension on right shift
* exp2l ld64 wrapper was wrong
* use scalbn instead of bithacks

fix loads of missing const in new libm, and some global vars (?!) in powl

2012年03月18日T05:58:28+00:00

first commit of the new libm!

2012年03月13日T05:17:53+00:00

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.