(popcount32): Reduce size of constants, to allow better code

[gnulib.git] / lib / popcount.h

diff --git a/lib/popcount.h b/lib/popcount.h
index 6c19de2..0ea6ed8 100644 (file)
--- a/lib/popcount.h
+++ b/lib/popcount.h
@@ -41,11 +41,11 @@
 static inline int
 popcount32 (unsigned int x)
 {
-  x = ((x & 0xaaaaaaaa) >> 1) + (x & 0x55555555);
-  x = ((x & 0xcccccccc) >> 2) + (x & 0x33333333);
-  x = ((x & 0xf0f0f0f0) >> 4) + (x & 0x0f0f0f0f);
-  x = ((x & 0xff00ff00) >> 8) + (x & 0x00ff00ff);
-  return (x >> 16) + (x & 0xff);
+  x = ((x & 0xaaaaaaaaU) >> 1) + (x & 0x55555555U);
+  x = ((x & 0xccccccccU) >> 2) + (x & 0x33333333U);
+  x = (x >> 16) + (x & 0xffff);
+  x = ((x & 0xf0f0) >> 4) + (x & 0x0f0f);
+  return (x >> 8) + (x & 0x00ff);
 }
 #endif