Mesa (lp-binning): llvmpipe: fix the worst of the depth regressions since switch to 4x4

[Keith Whitwell]

Module: Mesa
Branch: lp-binning
Commit: 280c8acc436690eefe5f6837a7a88f6b75a50393
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=280c8acc436690eefe5f6837a7a88f6b75a50393

Author: Keith Whitwell <keithw at vmware.com>
Date:   Thu Oct 22 17:21:37 2009 +0100

llvmpipe: fix the worst of the depth regressions since switch to 4x4

---

 src/gallium/drivers/llvmpipe/lp_rast.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/src/gallium/drivers/llvmpipe/lp_rast.c b/src/gallium/drivers/llvmpipe/lp_rast.c
index 6e94e22..32cd5e0 100644
--- a/src/gallium/drivers/llvmpipe/lp_rast.c
+++ b/src/gallium/drivers/llvmpipe/lp_rast.c
@@ -265,7 +265,7 @@ void lp_rast_shade_quads( struct lp_rasterizer *rast,
    /* depth buffer */
    assert((x % 2) == 0);
    assert((y % 2) == 0);
-   depth = tile->depth + iy*TILE_SIZE + 2*ix;
+   depth = tile->depth + (iy/4)*(16*16) + (ix/4)*16;
 
    /* XXX: This will most likely fail on 32bit x86 without -mstackrealign */
    assert(lp_check_alignment(masks, 16));