From 869b8ad499717eda4a1be04de4e516134123402c Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Sat, 20 Jan 2007 18:06:38 -0800
Subject: Add _mesa_ffsll() for compatibility on OSes without ffsll(), and use
 it.

---
 src/mesa/main/imports.c | 21 +++++++++++++++++++++
 src/mesa/main/imports.h |  3 +++
 2 files changed, 24 insertions(+)

(limited to 'src/mesa/main')

diff --git a/src/mesa/main/imports.c b/src/mesa/main/imports.c
index 996839a20e..ad77373075 100644
--- a/src/mesa/main/imports.c
+++ b/src/mesa/main/imports.c
@@ -574,6 +574,27 @@ _mesa_ffs(int i)
 #endif
 }
 
+int
+_mesa_ffsll(long long val)
+{
+#ifdef ffsll
+	return ffsll(val);
+#else
+	int bit;
+
+	assert(sizeof(val) == 8);
+
+	bit = ffs(val);
+	if (bit != 0)
+		return bit;
+
+	bit = ffs(val >> 32);
+	if (bit != 0)
+		return 32 + bit;
+
+	return 0;
+#endif
+}
 
 /**
  * Return number of bits set in given GLuint.
diff --git a/src/mesa/main/imports.h b/src/mesa/main/imports.h
index 19a9478f76..d9885dbeec 100644
--- a/src/mesa/main/imports.h
+++ b/src/mesa/main/imports.h
@@ -688,6 +688,9 @@ _mesa_pow(double x, double y);
 extern int
 _mesa_ffs(int i);
 
+extern int
+_mesa_ffsll(long long i);
+
 extern unsigned int
 _mesa_bitcount(unsigned int n);
 
-- 
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