From: Keith Whitwell <keithw@vmware.com>
Date: Thu, 22 Oct 2009 16:21:37 +0000 (+0100)
Subject: llvmpipe: fix the worst of the depth regressions since switch to 4x4
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=280c8acc436690eefe5f6837a7a88f6b75a50393;p=mesa.git

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

diff --git a/src/gallium/drivers/llvmpipe/lp_rast.c b/src/gallium/drivers/llvmpipe/lp_rast.c
index 6e94e22e5b2..32cd5e09f54 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));