--- /dev/null
+ldhack.h fix:
+ move ldouble manipulation into arch specific headers
+long double isnan, isinf..:
+ efficient macro versions of long double classification macros?
+ (they are ld* representation specific)
+lrint:
+ does inexact allowed on overflow?
+ see c99 7.12, 7.12.9.5, F.9, F.9.6.5
+small file cleanups:
+ if libm.h internals is not needed (ldexp,..) then include math.h only
+ LD64 wrap small long double functions as well
+trigonometric functions:
+ __rem_pio_large: is returning 2 bits enough?
+ __tan: 3rd arg semantics is probably not optimal
+ sinf,cosf: return sindf(-y) vs -sindf(y)?
+ __sin,__cos,..: z,w,.. -> x2,x4,.. so degree is easier to see
+ __rem_pio2*: rounding trick: simply use the low 32 bits of fn?
+nan:
+ use strtod? c99 7.12.11.2
+scalbf:
+ scalb is buggy, do we need the *f and *l version?
+scalbn:
+ needs a rewrite: signed int problems, wrong <-50000 check
+__ldexp_cexp:
+ only complex in math/, move to cmath?
+j0l, y0l,..:
+ declare long double bessel functions in math.h?
+uniform inexact exception raising:
+ (int)x == 0 and huge+x > 0 are used
+ unreachable code is not commented and hard to follow
+generic code fixes:
+ int32_t -> uint32_t conversion (subtle)
+ += 1, -= 1 -> ++, --
+ TWO52, one, zero, twom1000,.. -> use reasonable consts
+ (float)1 -> 1.0f
+ ldexp -> use scalbn internally (ldexp is a wrapper)
+ i386 vs precision -> assume extended prec setting
+ long double const trunc/slowness bug
+ remove "unsupported long double format" checks
+ sign bit (sqrt)
+fma:
+ expects single 53bit rounding
+ rewrite using long double arithmetics?
+log2:
+ dekker vs long double arithmetics
+tgamma:
+ missing
+ lanczos approx as in boost/math/special_functions, python/Modules/mathmodule.c
+ or bsd tgamma
+complex
+ optimizable creal cimag (libm.h macro for internal code?)
+ test? (using mdc lib, available test vectors,..)
+ Kahan, W. "Branch Cuts for Complex Elementary Functions, or Much Ado About Nothing's Sign Bit." 1987
+ Hull, Fairgrieve, Tang "Implementing complex elementary functions using exception handling" 1994
+ Hull, Fairgrieve, Tang "Implementing the complex arcsine and arccosine functions using exception handling" 1997
+ boost/math/complex
+ python/Modules/cmathmodule.c (+math, cmath tests)
+asm:
+ i386, x86_64 asm versions
+libm test
+ test vectors
+ special cases from c99 F.9, G
+ randomized test using mpfr
+arm fenv?