[ft-devel] assembler or builtin?

[Alexei Podtelezhnikov]

Hi all,

Many architectures have special instructions for the most significant
bit: BSR on x86, CLZ on ARM. Some compilers have builtin functions for
that too: __builtin_clz in gcc, _BitScanReverse in VC2005 and up. What
would be a preferred way of using this functionality in freetype
for FT_MSB?

Here is a relevant piece:
http://en.wikipedia.org/wiki/Find_first_set

Thanks,
Alexei