From: Brian Paul <brianp@vmware.com>
Date: Tue, 24 Nov 2009 01:09:46 +0000 (-0700)
Subject: mesa: use gcc __builtin_popcount()
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=863ad9a68388979e1d305f8689146e18ef4f098c;p=mesa.git

mesa: use gcc __builtin_popcount()
---

diff --git a/src/mesa/main/imports.c b/src/mesa/main/imports.c
index 46ffb929b6c..c9e00cf7528 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
 }