Changeset 2923c7b in mainline for uspace/lib/c/generic/bitops.c

Timestamp:

2013-10-16T16:21:44Z (11 years ago)

Author:

Vojtech Horky <vojtechhorky@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

f3287e5

Parents:

12d6c98

Message:

Actually implement popcountsi2()

File:

• uspace/lib/c/generic/bitops.c (modified) (1 diff)

uspace/lib/c/generic/bitops.c

@@ -33 +33 @@
 #include <bitops.h>
 
-extern int __popcountsi2(int a)
+int __popcountsi2(int a)
 {
-        return __builtin_popcount(a);
+        int bits = 0;
+        for (unsigned int i = 0; i < sizeof(a) * 8; i++)         {
+                if (((a >> i) & 1) != 0) {
+                        bits++;
+                }
+        }
+        return bits;                                                                    
 }