riscv/musl - musl - Gitea: Git with a cup of tea

Commit Graph

Author	SHA1	Message	Date
nsz	682e471400	remove unnecessary TODO comments from fma.c	14 years ago
nsz	d09a83f613	fmal bug fix: nan input should not raise exception	14 years ago
nsz	b1cbd70743	add fma implementation for x86 correctly rounded double precision fma using extended precision arithmetics for ld80 systems (x87)	14 years ago
Rich Felker	b935147761	assembly optimizations for fmod/remainder functions	14 years ago
Rich Felker	8d9e948652	asm versions of some simple math functions for i386 and x86_64 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.	14 years ago
nsz	afad262440	simplify lround and llround functions Simple wrappers around round is enough because spurious inexact exception is allowed.	14 years ago
nsz	65db00983f	make lrint and llrint functions work without fenv support	14 years ago
nsz	9b6899f2c5	faster lrint and llrint functions A faster workaround for spurious inexact exceptions when the result cannot be represented. The old code actually could be wrong, because gcc reordered the integer conversion and the exception check.	14 years ago
Rich Felker	9e2a895aaa	fix loads of missing const in new libm, and some global vars (?!) in powl	14 years ago
Rich Felker	8e092217dd	move nonstandard gamma() etc. to _GNU_SOURCE only it's not even provided in the library at the moment, but could easily be provided with weak aliases if desired.	14 years ago
Rich Felker	65db6bf5ea	c++ seems to want some casts in the float representation-access macros	14 years ago
Rich Felker	da0acc32ef	release notes for 0.8.7	14 years ago
Rich Felker	b60053e762	try fixing/optimizing x86_64 fenv exception code untested; may need followup-fixes.	14 years ago
Rich Felker	316e024f63	optimize x86 feclearexcept if all exception flags will be cleared, we can avoid the expensive store/reload of the environment and just use the fnclex instruction.	14 years ago
Rich Felker	9cb6878e74	fix x86_64 fe[gs]etround, analogous to nsz's x86 changes	14 years ago
Rich Felker	d5e576c752	minor 387 fenv optimizations	14 years ago
Rich Felker	0b337e04aa	Merge remote branch 'nsz/master'	14 years ago
nsz	88cfaf8a14	fix i386 fegetround and make fesetround faster Note that the new fesetround has slightly different semantics: Storing the floating-point environment with fnstenv makes the next fldenv (or fldcw) "non-signaling", so unmasked and pending exceptions does not invoke the exception handler. (These are rare since exceptions are handled immediately and by default all exceptions are masked anyway. But if one manually unmasks an exception in the control word then either sets the corresponding exception flag in the status word or the execution of an exception raising floating-point operation gets interrupted then it may happen). So the old implementation did not trap in some rare cases where the new implementation traps. However POSIX does not specify anything like the x87 exception handling traps and the fnstenv/fldenv pair is significantly slower than the fnstcw/fldcw pair (new code is about 5x faster here and it's dominated by the function call overhead).	14 years ago
Rich Felker	523a3ab1a2	don't fail on inability to install dynamic linker (e.g. if not root)	14 years ago
Rich Felker	d3fc724759	one more fenv availability issue: lround	14 years ago
Rich Felker	2e77dc13f8	make fma and lrint functions build without full fenv support 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.	14 years ago
Rich Felker	8c071f872b	other side of the signgam namespace fix: use the internal name	14 years ago
Rich Felker	1a3dce4184	make signgam a weak alias for an internal symbol otherwise, the standard C lgamma function will clobber a symbol in the namespace reserved for the application.	14 years ago
Rich Felker	de7db6e927	fix namespace issues for lgamma, etc. standard functions cannot depend on nonstandard symbols	14 years ago
Rich Felker	93a50a26cd	Merge remote branch 'nsz/master'	14 years ago
Rich Felker	2cbb24bba3	remove junk sincos implementations in preparation to merge nsz's real ones	14 years ago
Rich Felker	a43c3a337f	revert COPYRIGHT file changes in preparation to merge nsz's math branch	14 years ago
Rich Felker	6f21da618f	update copyright status (math library and new year)	14 years ago
Rich Felker	9d507419db	remove special nan handling from x86 sqrt asm a double precision nan, when converted to extended (80-bit) precision, will never end in 0x400, since the corresponding bits do not exist in the original double precision value. thus there's no need to waste time and code size on this check.	14 years ago
Rich Felker	1295848efb	simplify nan check in sqrt (x86 asm); result of sqrt is never negative	14 years ago
nsz	40305f74bd	in math.h make lgamma_r and non-double bessel _GNU_SOURCE only long double and float bessel functions are no longer xsi extensions	14 years ago
nsz	0144b45b71	efficient sincos based on sin and cos	14 years ago
Rich Felker	5657cc58e5	implement sincosf and sincosl functions; add prototypes presumably broken gcc may generate calls to these, and it's said that ffmpeg makes use of sincosf.	14 years ago
Rich Felker	46702f68f9	avoid changing NaNs in sqrt (x86 asm) to satisfy c99 f.9 recommendation	14 years ago
Rich Felker	809556e60a	correctly rounded sqrt() asm for x86 (i387) the fsqrt opcode is correctly rounded, but only in the fpu's selected precision mode, which is 80-bit extended precision. to get a correctly rounded double precision output, we check for the only corner cases where two-step rounding could give different results than one-step (extended-precision mantissa ending in 0x400) and adjust the mantissa slightly in the opposite direction of the rounding which the fpu already did (reported in the c1 flag of the fpu status word). this should have near-zero cost in the non-corner cases and at worst very low cost. note that in order for sqrt() to get used when compiling with gcc, the broken, non-conformant builtin sqrt must be disabled.	14 years ago
Rich Felker	e0a54e6725	correct rounding for i387 sqrtf function	14 years ago
nsz	32ca5ef3ff	math cleanup: use 1.0f instead of 1.0F	14 years ago
nsz	8d0a6f7a1c	math cleanup: use 1.0f instead of (float)1.0	14 years ago
nsz	9560b6b152	remove libm.h includes when math.h and float.h are enough	14 years ago
Rich Felker	291f839a44	fix scanf handling of "0" (followed by immediate EOF) with "%x" other cases with %x were probably broken too. I would actually like to go ahead and replace this code in scanf with calls to the new __intparse framework, but for now this calls for a quick and unobtrusive fix without the risk of breaking other things.	14 years ago
nsz	df8b3e5aef	clean up __expo2.c, use a slightly better k constant	14 years ago
nsz	3a6c828652	fix copyright notice for the math lib	14 years ago
Rich Felker	bf9d9dcaa6	implement nan, nanf, nanl	14 years ago
Rich Felker	b69f695ace	first commit of the new libm! 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.	14 years ago
Rich Felker	d46cf2e14c	add .gitignore file I've had this around for a long time but somehow it never got committed.	14 years ago
Rich Felker	405ce58dcf	fix nan/infinity macros in math.h, etc. the previous version not only failed to work in c++, but also failed to produce constant expressions, making the macros useless as initializers for objects of static storage duration. gcc 3.3 and later have builtins for these, which sadly seem to be the most "portable" solution. the alternative definitions produce exceptions (for NAN) and compiler warnings (for INFINITY) on newer versions of gcc.	14 years ago
Rich Felker	b4a07bb469	fix obscure bug in strtoull reading the highest 16 possible values	14 years ago
Rich Felker	9fcecd7b34	typo in math.h c version check	14 years ago
Rich Felker	db3e78cee5	make math.h compatibe with c89	14 years ago
Rich Felker	6cf51fe51a	remove debug cruft that was left in getdate	14 years ago

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941 Commits (25501c1079756c9b438842da649585c2a6983c24) All Branches Search

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