diff options
Diffstat (limited to 'libc-top-half/musl/src/math/asinhl.c')
| -rw-r--r-- | libc-top-half/musl/src/math/asinhl.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/libc-top-half/musl/src/math/asinhl.c b/libc-top-half/musl/src/math/asinhl.c new file mode 100644 index 0000000..8635f52 --- /dev/null +++ b/libc-top-half/musl/src/math/asinhl.c @@ -0,0 +1,41 @@ +#include "libm.h" + +#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024 +long double asinhl(long double x) +{ + return asinh(x); +} +#elif LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384 +/* asinh(x) = sign(x)*log(|x|+sqrt(x*x+1)) ~= x - x^3/6 + o(x^5) */ +long double asinhl(long double x) +{ + union ldshape u = {x}; + unsigned e = u.i.se & 0x7fff; + unsigned s = u.i.se >> 15; + + /* |x| */ + u.i.se = e; + x = u.f; + + if (e >= 0x3fff + 32) { + /* |x| >= 0x1p32 or inf or nan */ + x = logl(x) + 0.693147180559945309417232121458176568L; + } else if (e >= 0x3fff + 1) { + /* |x| >= 2 */ + x = logl(2*x + 1/(sqrtl(x*x+1)+x)); + } else if (e >= 0x3fff - 32) { + /* |x| >= 0x1p-32 */ + x = log1pl(x + x*x/(sqrtl(x*x+1)+1)); + } else { + /* |x| < 0x1p-32, raise inexact if x!=0 */ + FORCE_EVAL(x + 0x1p120f); + } + return s ? -x : x; +} +#elif LDBL_MANT_DIG == 113 && LDBL_MAX_EXP == 16384 +// TODO: broken implementation to make things compile +long double asinhl(long double x) +{ + return asinh(x); +} +#endif |