fdo-mirrors/mesa
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/mesa/mesa.git synced 2026-05-05 16:08:04 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

better ffs() function (bug 4956)

Browse source
This commit is contained in:
Brian Paul 2005-11-04 16:47:22 +00:00
parent 8ff68b2bf3
commit 2cb1cf484a
1 changed files with 20 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

26
src/mesa/main/imports.c
View file

@ -535,12 +535,26 @@ int
_mesa_ffs(int i)
{
#if defined(_WIN32) && !defined(__MINGW32__)
int bit;
if (i == 0)
return 0;
for (bit = 1; !(i & 1); bit++)
i >>= 1;
return bit;
register int bit = 0;
if (i != 0) {
if ((i & 0xffff) == 0) {
bit += 16;
i >>= 16;
}
if ((i & 0xff) == 0) {
bit += 8;
i >>= 8;
}
if ((i & 0xf) == 0) {
bit += 4;
i >>= 4;
}
while ((i & 1) == 0) {
bit++;
i >>= 1;
}
return bit;
}
#elif defined(XFree86LOADER) && defined(IN_MODULE)
return xf86ffs(i);
#else