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mesa: use gcc __builtin_popcount()
author
Brian Paul
<brianp@vmware.com>
Tue, 24 Nov 2009 01:09:46 +0000
(18:09 -0700)
committer
Brian Paul
<brianp@vmware.com>
Tue, 24 Nov 2009 01:09:46 +0000
(18:09 -0700)
src/mesa/main/imports.c
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diff --git
a/src/mesa/main/imports.c
b/src/mesa/main/imports.c
index 46ffb929b6cd81c8c96f2c782847a3fdb05a1841..c9e00cf7528b0fdc30de31e2ffa83a055736da96 100644
(file)
--- a/
src/mesa/main/imports.c
+++ b/
src/mesa/main/imports.c
@@
-629,11
+629,15
@@
_mesa_ffsll(int64_t val)
unsigned int
_mesa_bitcount(unsigned int n)
{
+#if defined(__GNUC__)
+ return __builtin_popcount(n);
+#else
unsigned int bits;
for (bits = 0; n > 0; n = n >> 1) {
bits += (n & 1);
}
return bits;
+#endif
}