Mesa (master): i965/fs: Gen4: Zero out extra coordinates when using shadow compare
Chris Forbes
chrisf at kemper.freedesktop.org
Sun Sep 1 07:52:12 UTC 2013
Module: Mesa
Branch: master
Commit: f35dea05b1329b9303a11fb803897fb189ff99b4
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=f35dea05b1329b9303a11fb803897fb189ff99b4
Author: Chris Forbes <chrisf at ijw.co.nz>
Date: Tue Aug 27 19:35:49 2013 +1200
i965/fs: Gen4: Zero out extra coordinates when using shadow compare
Fixes broken rendering if these MRFs contained anything other than zero.
NOTE: This is a candidate for stable branches.
Signed-off-by: Chris Forbes <chrisf at ijw.co.nz>
Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>
---
src/mesa/drivers/dri/i965/brw_fs_visitor.cpp | 8 +++++++-
1 files changed, 7 insertions(+), 1 deletions(-)
diff --git a/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp b/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
index b049436..1e01d39 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
@@ -876,7 +876,13 @@ fs_visitor::emit_texture_gen4(ir_texture *ir, fs_reg dst, fs_reg coordinate,
emit(MOV(fs_reg(MRF, base_mrf + mlen + i), coordinate));
coordinate.reg_offset++;
}
- /* gen4's SIMD8 sampler always has the slots for u,v,r present. */
+
+ /* gen4's SIMD8 sampler always has the slots for u,v,r present.
+ * the unused slots must be zeroed.
+ */
+ for (int i = ir->coordinate->type->vector_elements; i < 3; i++) {
+ emit(MOV(fs_reg(MRF, base_mrf + mlen + i), fs_reg(0.0f)));
+ }
mlen += 3;
if (ir->op == ir_tex) {
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