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| author | peter <peter@FreeBSD.org> | 1999-08-19 14:54:40 +0000 |
|---|---|---|
| committer | peter <peter@FreeBSD.org> | 1999-08-19 14:54:40 +0000 |
| commit | 8ffe59d0bfda567fe8d56ea92c83e8b9aa261da8 (patch) | |
| tree | 6cb3778e79a4a5b9d129b9fcea4085c1e041a1d5 /sys/dev/de | |
| parent | d4c0c0bd4aa267c169eeebee5cb975271791f325 (diff) | |
| download | FreeBSD-src-8ffe59d0bfda567fe8d56ea92c83e8b9aa261da8.zip FreeBSD-src-8ffe59d0bfda567fe8d56ea92c83e8b9aa261da8.tar.gz | |
Undo my previous commit and do it differently. Break the ffs() etc macros
into two parts - one to do the bsfl and the other to convert the result
(base 0) to ffs()-like (base 1) in inline C. This enables the optimizer
to be a lot smarter in certain cases, like where it knows that the argument
is non-zero and we want ffs(known non zero arg) - 1. This appears to
produce identical code to the old inline when the argument is unknown.
Diffstat (limited to 'sys/dev/de')
0 files changed, 0 insertions, 0 deletions
