summaryrefslogtreecommitdiff
AgeCommit message (Collapse)AuthorLines
2012-03-16revert COPYRIGHT file changes in preparation to merge nsz's math branchRich Felker-4/+5
2012-03-16update copyright status (math library and new year)Rich Felker-6/+5
2012-03-15remove special nan handling from x86 sqrt asmRich Felker-3/+0
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.
2012-03-15simplify nan check in sqrt (x86 asm); result of sqrt is never negativeRich Felker-4/+3
2012-03-15implement sincosf and sincosl functions; add prototypesRich Felker-0/+19
presumably broken gcc may generate calls to these, and it's said that ffmpeg makes use of sincosf.
2012-03-15avoid changing NaNs in sqrt (x86 asm) to satisfy c99 f.9 recommendationRich Felker-0/+4
2012-03-15correctly rounded sqrt() asm for x86 (i387)Rich Felker-0/+16
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.
2012-03-13correct rounding for i387 sqrtf functionRich Felker-0/+2
2012-03-13fix scanf handling of "0" (followed by immediate EOF) with "%x"Rich Felker-11/+6
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.
2012-03-13implement nan, nanf, nanlRich Felker-0/+18
2012-03-13first commit of the new libm!Rich Felker-7738/+20547
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.
2012-03-09add .gitignore fileRich Felker-0/+9
I've had this around for a long time but somehow it never got committed.
2012-03-02fix nan/infinity macros in math.h, etc.Rich Felker-6/+8
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.
2012-03-02fix obscure bug in strtoull reading the highest 16 possible valuesRich Felker-1/+1
2012-03-02typo in math.h c version checkRich Felker-1/+1
2012-03-02make math.h compatibe with c89Rich Felker-1/+5
2012-03-02remove debug cruft that was left in getdateRich Felker-2/+0
2012-03-02first try at implementing getdate functionRich Felker-0/+47
2012-03-02fix bugs in strptime handling of string day/month names, literalsRich Felker-0/+2
2012-03-01implement a64l and l64a (legacy xsi stuff)Rich Felker-0/+26
2012-03-01add all missing wchar functions except floating point parsersRich Felker-0/+98
these are mostly untested and adapted directly from corresponding byte string functions and similar.
2012-03-01support null buffer argument to getcwd, auto-allocating behaviorRich Felker-1/+6
this is a popular extension some programs depend on, and by using a temporary buffer and strdup rather than malloc prior to the syscall, i've avoided the dependency on free and thus minimized the bloat cost of supporting this feature.
2012-03-01add memory.h, bogus legacy alias for string.hRich Felker-0/+1
2012-03-01search internal headers firstRich Felker-1/+1
this is necessitated by the ugly <syscall.h> just added
2012-02-29use c++-friendly initializers for pthread initializer definitionsRich Felker-3/+3
these will also avoid obnoxious warnings with gcc -Wbraces.
2012-02-29add <syscall.h> as an alias for <sys/syscall.h>Rich Felker-0/+1
apparently some broken stuff (libstdc++) needs this.
2012-02-28implement wcsftime functionRich Felker-0/+32
2012-02-28release notes for 0.8.6v0.8.6Rich Felker-0/+7
2012-02-28fix pthread_cleanup_pop(1) crash in non-thread-capable, static-linked programsRich Felker-2/+2
2012-02-27update release notes for 0.8.5v0.8.5Rich Felker-0/+35
2012-02-27work around "signal loses thread pointer" issue with "approach 2"Rich Felker-2/+8
this was discussed on the mailing list and no consensus on the preferred solution was reached, so in anticipation of a release, i'm just committing a minimally-invasive solution that avoids the problem by ensuring that multi-threaded-capable programs will always have initialized the thread pointer before any signal handler can run. in the long term we may switch to initializing the thread pointer at program start time whenever the program has the potential to access any per-thread data.
2012-02-25use __attribute__((const)) on arm __pthread_self functionRich Felker-1/+3
2012-02-24replace prototype for basename in string.h with non-prototype declarationRich Felker-1/+1
GNU programs may expect the GNU version of basename, which has a different prototype (argument is const-qualified) and prototype it themselves too. of course if they're expecting the GNU behavior for the function, they'll still run into problems, but at least this eliminates some compile-time failures.
2012-02-24new attempt at working around the gcc 3 visibility bugRich Felker-0/+11
since gcc is failing to generate the necessary ".hidden" directive in the output asm, generate it explicitly with an __asm__ statement...
2012-02-24remove useless attribute visibility from definitionsRich Felker-2/+2
this was a failed attempt at working around the gcc 3 visibility bug affecting x86_64. subsequent patch will address it with an ugly but working hack.
2012-02-23cleanup and work around visibility bug in gcc 3 that affects x86_64Rich Felker-12/+15
in gcc 3, the visibility attribute must be placed on both the declaration and on the definition. if it's omitted from the definition, the compiler fails to emit the ".hidden" directive in the assembly, and the linker will either generate textrels (if supported, such as on i386) or refuse to link (on targets where certain types of textrels are forbidden or impossible without further assumptions about memory layout, such as on x86_64). this patch also unifies the decision about when to use visibility into libc.h and makes the visibility in the utf-8 state machine tables based on libc.h rather than a duplicate test.
2012-02-23fix (hopefully) PTRACE_TRACEME (command 0) argument handlingRich Felker-2/+2
2012-02-23fix for previous incorrect fix of cancellation in dns lookupsRich Felker-3/+4
uninitialized file descriptor was being closed on return, causing stdin to be closed in many cases.
2012-02-17fix get_current_dir_name behaviorRich Felker-2/+6
2012-02-17remove -std=gnu99 from musl-gcc wrapperRich Felker-1/+1
while probably desirable, changing the default language variant is outside the scope of the wrapper's responsibility.
2012-02-17two fixes for "make install" handling of shared libsRich Felker-1/+2
1. don't try to install (and thus build) shared libs when they were disabled in config.mak 2. ensure that the path for the dynamic linker exists before attempting to install it.
2012-02-17add get_current_dir_name functionRich Felker-0/+13
2012-02-15add float_t and double_t to math.hRich Felker-0/+11
2012-02-11fix default nameserver when resolv.conf doesn't existRich Felker-1/+2
2012-02-11fix illegal goto out of cleanup context in dns lookupsRich Felker-3/+3
2012-02-09small fix for new pthread cleanup stuffRich Felker-1/+1
even if pthread_create/exit code is not linked, run flag needs to be checked and cleanup function potentially run on pop. thus, move the code to the module that's always linked when pthread_cleanup_push/pop is used.
2012-02-09replace bad cancellation cleanup abi with a sane oneRich Felker-115/+32
the old abi was intended to duplicate glibc's abi at the expense of being ugly and slow, but it turns out glib was not even using that abi except on non-gcc-compatible compilers (which it doesn't even support) and was instead using an exceptions-in-c/unwind-based approach whose abi we could not duplicate anyway without nasty dwarf2/unwind integration. the new abi is copied from a very old glibc abi, which seems to still be supported/present in current glibc. it avoids all unwinding, whether by sjlj or exceptions, and merely maintains a linked list of cleanup functions to be called from the context of pthread_exit. i've made some care to ensure that longjmp out of a cleanup function should work, even though it is not required to. this change breaks abi compatibility with programs which were using pthread cancellation, which is unfortunate, but that's why i'm making the change now rather than later. considering that most pthread features have not been usable until recently anyway, i don't see it as a major issue at this point.
2012-02-09document iswspace and remove wrongly-included zwsp characterRich Felker-1/+5
2012-02-09fix typo in iswspace space list tableRich Felker-1/+1
2012-02-07fix typo in inotify.hRich Felker-1/+1