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2019-10-13math: fix signed int left shift ub in sqrtSzabolcs Nagy-2/+1
Both sqrt and sqrtf shifted the signed exponent as signed int to adjust the bit representation of the result. There are signed right shifts too in the code but those are implementation defined and are expected to compile to arithmetic shift on supported compilers and targets.
2012-03-19code cleanup of named constantsnsz-5/+5
zero, one, two, half are replaced by const literals The policy was to use the f suffix for float consts (1.0f), but don't use suffix for long double consts (these consts can be exactly represented as double).
2012-03-13first commit of the new libm!Rich Felker-0/+185
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.