Mesa (master): i965/vec4: Override destination register writemask in sampler message send.

[Francisco Jerez]

Module: Mesa
Branch: master
Commit: 946e29847bb6bca18244192bad8058922ae0a948
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=946e29847bb6bca18244192bad8058922ae0a948

Author: Francisco Jerez <currojerez at riseup.net>
Date:   Thu Feb 12 10:20:49 2015 +0200

i965/vec4: Override destination register writemask in sampler message send.

This line was removed by accident in commit
16b911257440afbd77a6eb762e28df62e3c19bc7 causing a regression in the
ES3-CTS.gtf.GL3Tests.shadow.shadow_execution_vert Khronos conformance
test.  It's necessary because the swizzle_result() code below expects
all four components of the vector to be valid.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=89094
Tested-by: Lu Hua <huax.lu at intel.com>
Reviewed-by: Matt Turner <mattst88 at gmail.com>

---

 src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp |    1 +
 1 file changed, 1 insertion(+)

diff --git a/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp b/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
index c4c134f..faae2c9 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
+++ b/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
@@ -2613,6 +2613,7 @@ vec4_visitor::visit(ir_texture *ir)
       is_high_sampler(brw, sampler_reg);
    inst->base_mrf = 2;
    inst->mlen = inst->header_present + 1; /* always at least one */
+   inst->dst.writemask = WRITEMASK_XYZW;
    inst->shadow_compare = ir->shadow_comparitor != NULL;
 
    inst->src[1] = sampler_reg;