Changeset 0c96e6cb in mainline for uspace/lib/c/generic/bitops.c

Timestamp:

2013-10-18T11:00:23Z (12 years ago)

Author:

Vojtech Horky <vojtechhorky@…>

Branches:

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

Children:

b5851913

Parents:

39bcc99 (diff), 9f9450bb (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.

Message:

Merge GCC port updates

libposix changes

• unimplemented methods do not abort, they warn instead
• add pthread.h, no implementation yet
• speed-up symbol redefinition (objcopy can work with static libraries as well)
• add some functions already implemented in libc to libposix

toolchain changes

• experimental support for HelenOS-specific toolchain
  • toolchain.sh —helenos-target
  • adds *-helenos*- target, e.g. we can have amd64-helenos-gcc
  • added as another choice to HelenOS.config, updated other scripts accordingly
• added non-root compilation
  • install into PKG/ to be later copied to real root (package-like installation)

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;                                                                    
 }