From 863ad9a68388979e1d305f8689146e18ef4f098c Mon Sep 17 00:00:00 2001
From: Brian Paul <brianp@vmware.com>
Date: Mon, 23 Nov 2009 18:09:46 -0700
Subject: mesa: use gcc __builtin_popcount()

---
 src/mesa/main/imports.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'src/mesa/main')

diff --git a/src/mesa/main/imports.c b/src/mesa/main/imports.c
index 46ffb929b6..c9e00cf752 100644
--- 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
 }
 
 
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