Mesa (master): vl/zscan: fix "Fix trivial sign compare warnings"

[Christian König]

Module: Mesa
Branch: master
Commit: ac57bcda1e0e6dcfa81e24468d5b682686120649
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=ac57bcda1e0e6dcfa81e24468d5b682686120649

Author: Christian König <christian.koenig at amd.com>
Date:   Wed Dec 14 15:03:35 2016 +0100

vl/zscan: fix "Fix trivial sign compare warnings"

The variable actually needs to be signed, otherwise converting it to a
float doesn't work as expected.

Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=98914
Signed-off-by: Christian König <christian.koenig at amd.com>
Reviewed-by: Nayan Deshmukh <nayan26deshmukh at gmail.com>
Cc: "13.0" <mesa-stable at lists.freedesktop.org>
Fixes: 1fb4179f927 ("vl: Fix trivial sign compare warnings")

---

 src/gallium/auxiliary/vl/vl_zscan.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/gallium/auxiliary/vl/vl_zscan.c b/src/gallium/auxiliary/vl/vl_zscan.c
index ef05af4..24d6452 100644
--- a/src/gallium/auxiliary/vl/vl_zscan.c
+++ b/src/gallium/auxiliary/vl/vl_zscan.c
@@ -152,7 +152,7 @@ create_vert_shader(struct vl_zscan *zscan)
    for (i = 0; i < zscan->num_channels; ++i) {
       ureg_ADD(shader, ureg_writemask(tmp, TGSI_WRITEMASK_X), ureg_scalar(ureg_src(tmp), TGSI_SWIZZLE_Y),
                ureg_imm1f(shader, 1.0f / (zscan->blocks_per_line * VL_BLOCK_WIDTH)
-                * (i - (signed)zscan->num_channels / 2)));
+                * ((signed)i - (signed)zscan->num_channels / 2)));
 
       ureg_MAD(shader, ureg_writemask(o_vtex[i], TGSI_WRITEMASK_X), vrect,
                ureg_imm1f(shader, 1.0f / zscan->blocks_per_line), ureg_src(tmp));