From 59ca1ae84b2c15c8a94211da158f563e45560bcd Mon Sep 17 00:00:00 2001
From: Keith Whitwell <keithw@vmware.com>
Date: Wed, 15 Sep 2010 16:28:49 +0100
Subject: llvmpipe: return zero from floor_pot(zero)

---
 src/gallium/drivers/llvmpipe/lp_setup_tri.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'src/gallium/drivers/llvmpipe')

diff --git a/src/gallium/drivers/llvmpipe/lp_setup_tri.c b/src/gallium/drivers/llvmpipe/lp_setup_tri.c
index 53ffb95505b..5090f82ab5f 100644
--- a/src/gallium/drivers/llvmpipe/lp_setup_tri.c
+++ b/src/gallium/drivers/llvmpipe/lp_setup_tri.c
@@ -447,8 +447,10 @@ do_triangle_ccw(struct lp_setup_context *setup,
 static INLINE uint32_t 
 floor_pot(uint32_t n)
 {
-   assert(n);
 #if defined(PIPE_CC_GCC) && defined(PIPE_ARCH_X86)
+   if (n == 0)
+      return 0;
+
    __asm__("bsr %1,%0"
           : "=r" (n)
           : "rm" (n));
-- 
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