llvmpipe: return zero from floor_pot(zero)

This commit is contained in:
Keith Whitwell 2010-09-15 16:28:49 +01:00
parent fd4c6bd135
commit 8e8a42ffc5

View file

@ -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));