---
lib/ext2fs/bitops.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/lib/ext2fs/bitops.c b/lib/ext2fs/bitops.c
index 7c3f215..0668469 100644
--- a/lib/ext2fs/bitops.c
+++ b/lib/ext2fs/bitops.c
@@ -125,11 +125,15 @@ static unsigned int popcount8(unsigned int w)
static unsigned int popcount32(unsigned int w)
{
+#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
+ return __builtin_popcount(w);
+#else
unsigned int res = w - ((w >> 1) & 0x55555555);
res = (res & 0x33333333) + ((res >> 2) & 0x33333333);
res = (res + (res >> 4)) & 0x0F0F0F0F;
res = res + (res >> 8);
return (res + (res >> 16)) & 0x000000FF;
+#endif
}
unsigned int ext2fs_bitcount(const void *addr, unsigned int nbytes)
--
1.8.1
--
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