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: [PATCH] Add _mesa_ffsll() for compatibility on OSes without ffsll(),
 and use it.

---
 src/mesa/drivers/dri/i965/brw_draw_upload.c |  2 +-
 src/mesa/main/imports.c                     | 21 +++++++++++++++++++++
 src/mesa/main/imports.h                     |  3 +++
 3 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/src/mesa/drivers/dri/i965/brw_draw_upload.c b/src/mesa/drivers/dri/i965/brw_draw_upload.c
index 57ee294f0cf..08741ad90f6 100644
--- a/src/mesa/drivers/dri/i965/brw_draw_upload.c
+++ b/src/mesa/drivers/dri/i965/brw_draw_upload.c
@@ -414,7 +414,7 @@ GLboolean brw_upload_vertices( struct brw_context *brw,
     */
    
    while (tmp) {
-      GLuint i = ffsll(tmp)-1;
+      GLuint i = _mesa_ffsll(tmp)-1;
       struct brw_vertex_element *input = &brw->vb.inputs[i];
 
       tmp &= ~((GLuint64EXT)1<<i);
diff --git a/src/mesa/main/imports.c b/src/mesa/main/imports.c
index 996839a20e9..ad77373075b 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 19a9478f76a..d9885dbeec4 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);
 
-- 
2.30.2