Avoid using fmax from libm.

Implements logb methods (logb, logbf, logbl) for IEEE-754. This avoids pulling in a libm dependency from compiler-rt, but is not meant to replace it (

Avoid using scalbn from libm. Unlike libc/libm scalbn, this function never sets errno on underflow/overflow.

If thrown_object is not null, atomically decrement the referenceCount field of the __cxa_exception header associated with the thrown object referr

Upon exit for any reason, a handler must call: void __cxa_end_catch (); This routine can be called for either a native or foreign exception. For

* l_in, r_in, l_out, and r_out are in pseudo-"big-endian" format. */

Finds the position of the exponent character 'e' at the end of the buffer. Assuming there is an exponent the input will terminate with eSdd and eSddd

This old API entry point is no longer used by Clang for Darwin. We still need to keep it around to ensure that object files that reference it are stil

https://www.unicode.org/glossary/#code_point

* __ldexp_cexp(x, expt) compute exp(x) * 2**expt. * It is intended for large arguments (real part >= ln(DBL_MAX)) * where care is needed to avoid ov

Returns floor(log_10(2^__e)).

Here we do this operation as int64 to avoid overflow.