mirror/musl - mirror of git://git.musl-libc.org/musl

	Commit message (Collapse)	Author	Age	Files	Lines
*	math: fix exp.s on i386 and x86_64 so the exception flags are correct	nsz	2012-08-08	1	-19/+17
\| \| \| \|	exp(inf), exp(-inf), exp(nan) used to raise wrong flags
*	use fistpll mnemonic instead of fistpq (more widely supported) on x86_64 too	Rich Felker	2012-06-02	1	-1/+1
\| \| \| \| \|	this was fixed previously on i386 but the corresponding code on x86_64 was missed.
*	math: change the formula used for acos.s	nsz	2012-05-05	1	-10/+8
\| \| \| \| \| \| \| \| \| \|	old: 2atan2(sqrt(1-x),sqrt(1+x)) new: atan2(fabs(sqrt((1-x)(1+x))),x) improvements: * all edge cases are fixed (sign of zero in downward rounding) * a bit faster (here a single call is about 131ns vs 162ns) * a bit more precise (at most 1ulp error on 1M uniform random samples in [0,1), the old formula gave some 2ulp errors as well)
*	fix typo in the x86_64 rounding asm	Rich Felker	2012-04-29	4	-4/+4
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*	new math asm (abs/rounding) for x86_64	Rich Felker	2012-04-29	6	-0/+36
\| \| \| \|	untested
*	math: fix x86 asin accuracy	nsz	2012-04-04	1	-3/+3
\| \| \| \| \|	use (1-x)(1+x) instead of (1-xx) in asin.s the later can be inaccurate with upward rounding when x is close to 1
*	math: remove x86 modf asm	nsz	2012-03-29	1	-27/+0
\| \| \| \| \|	the int part was wrong when -1 < x <= -0 (+0.0 instead of -0.0) and the size and performace gain of the asm version was negligible
*	acos.s fix: use the formula acos(x) = atan2(sqrt(1-x),sqrt(1+x))	nsz	2012-03-22	1	-3/+1
\| \| \| \| \| \| \|	the old formula atan2(1,sqrt((1+x)/(1-x))) was faster but could give nan result at x=1 when the rounding mode is FE_DOWNWARD (so 1-1 == -0 and 2/-0 == -inf), the new formula gives -0 at x=+-1 with downward rounding.
*	x86_64 math asm, long double functions only	Rich Felker	2012-03-20	17	-0/+239
\| \| \| \| \| \| \|	this has not been tested heavily, but it's known to at least assemble and run in basic usage cases. it's nearly identical to the corresponding i386 code, and thus expected to be just as correct or just as incorrect.
*	assembly optimizations for fmod/remainder functions	Rich Felker	2012-03-18	2	-0/+22
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*	asm versions of some simple math functions for i386 and x86_64	Rich Felker	2012-03-18	2	-0/+12
\| \| \| \| \| \| \|	these are functions that have direct fpu approaches to implementation without problematic exception or rounding issues. x86_64 lacks float/double versions because i'm unfamiliar with the necessary sse code for performing these operations.
*	first commit of the new libm!	Rich Felker	2012-03-13	3	-0/+5
\| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \|	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.
*	type directives for x86_64 math asm	Rich Felker	2011-06-26	2	-0/+2
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*	Port musl to x86-64. One giant commit!	Nicholas J. Kain	2011-02-15	2	-0/+6