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-rw-r--r--src/mesa/drivers/dri/i965/brw_eu_emit.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_eu_emit.c b/src/mesa/drivers/dri/i965/brw_eu_emit.c
index f26c9135658..36c494ee2b3 100644
--- a/src/mesa/drivers/dri/i965/brw_eu_emit.c
+++ b/src/mesa/drivers/dri/i965/brw_eu_emit.c
@@ -126,6 +126,8 @@ brw_set_dest(struct brw_compile *p, struct brw_instruction *insn,
else {
insn->bits1.da16.dest_subreg_nr = dest.subnr / 16;
insn->bits1.da16.dest_writemask = dest.dw1.bits.writemask;
+ assert(dest.dw1.bits.writemask != 0 ||
+ dest.file == BRW_ARCHITECTURE_REGISTER_FILE);
/* From the Ivybridge PRM, Vol 4, Part 3, Section 5.2.4.1:
* Although Dst.HorzStride is a don't care for Align16, HW needs
* this to be programmed as "01".