[Mesa-dev] [PATCH 09/13] i965: When emitting a src/dst write of an output, keep the write mask

[Ian Romanick]

From: Ian Romanick <ian.d.romanick at intel.com>

Fixes i965 piglit:

    vs-varying-array-mat[234]-col-row-wr
    vs-varying-array-mat[234]-index-col-row-wr
    vs-varying-array-mat[234]-index-row-wr
    vs-varying-array-mat[234]-row-wr
    vs-varying-mat[234]-col-row-wr
    vs-varying-mat[234]-row-wr

Reviewed-by: Eric Anholt <eric at anholt.net>
Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>
---
 src/mesa/drivers/dri/i965/brw_vs_emit.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_vs_emit.c b/src/mesa/drivers/dri/i965/brw_vs_emit.c
index 9d73334..5ef8b07 100644
--- a/src/mesa/drivers/dri/i965/brw_vs_emit.c
+++ b/src/mesa/drivers/dri/i965/brw_vs_emit.c
@@ -1993,7 +1993,11 @@ void brw_vs_emit(struct brw_vs_compile *c )
       index = inst->DstReg.Index;
       file = inst->DstReg.File;
       if (file == PROGRAM_OUTPUT && c->output_regs[index].used_in_src)
-	  dst = c->output_regs[index].reg;
+	 /* Can't just make get_dst "do the right thing" here because other
+	  * callers of get_dst don't expect any special behavior for the
+	  * c->output_regs[index].used_in_src case.
+	  */
+	 dst = brw_writemask(c->output_regs[index].reg, inst->DstReg.WriteMask);
       else
 	  dst = get_dst(c, inst->DstReg);
 
-- 
1.7.4.4