From: Marek Olšák <marek.ol...@amd.com>
I'll need this in radeonsi.
v2: use __builtin_popcountll if available
---
src/gallium/auxiliary/util/u_math.h | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/src/gallium/auxiliary/util/u_math.h
b/src/gallium/auxiliary/util/u_math.h
index 39bd40f..f95c111 100644
--- a/src/gallium/auxiliary/util/u_math.h
+++ b/src/gallium/auxiliary/util/u_math.h
@@ -727,6 +727,18 @@ util_bitcount(unsigned n)
#endif
}
+
+static INLINE unsigned
+util_bitcount64(uint64_t n)
+{
+#ifdef HAVE___BUILTIN_POPCOUNTLL
+ return __builtin_popcountll(n);
+#else
+ return util_bitcount(n) + util_bitcount(n >> 32);
+#endif
+}
+
+
/**
* Reverse bits in n
* Algorithm taken from:
--
1.9.1
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