tree 7bce76bac878ecd7978ce11639f0fb070db5986c
parent 15e008f2098fb6e684758a7c6dc628d68b10e69c
author Martin Storsjö <martin@martin.st> 1605258057 +0200
committer Martin Storsjö <martin@martin.st> 1605262777 +0200

crt: Make log2() return exact results for powers of two

These routines are used on msvcrt.dll on arm, which only provides
log(). For exact powers of two, produce an exact result instead
of one that only is numerically close.

Defer to the normal implementation for anything other than the
simple cases (negative values, denormals, infinities, etc).

Signed-off-by: Martin Storsjö <martin@martin.st>