memcpy: free buffer in case of failure

[fio.git] / lib / hweight.c

diff --git a/lib/hweight.c b/lib/hweight.c
index 738ed277380118eca1672e7095023c95ac7340c6..2c819d6a41a85f4965123aa7c7b109dbcce36ce9 100644 (file)
--- a/lib/hweight.c
+++ b/lib/hweight.c
@@ -17,3 +17,17 @@ unsigned int hweight32(uint32_t w)
        res = res + (res >> 8);
        return (res + (res >> 16)) & 0x000000FF;
 }
+
+unsigned int hweight64(uint64_t w)
+{
+#if BITS_PER_LONG == 32
+       return hweight32((unsigned int)(w >> 32)) + hweight32((unsigned int)w);
+#else
+       uint64_t res = w - ((w >> 1) & 0x5555555555555555ULL);
+       res = (res & 0x3333333333333333ULL) + ((res >> 2) & 0x3333333333333333ULL);
+       res = (res + (res >> 4)) & 0x0F0F0F0F0F0F0F0FULL;
+       res = res + (res >> 8);
+       res = res + (res >> 16);
+       return (res + (res >> 32)) & 0x00000000000000FFULL;
+#endif
+}