[Mesa-dev] [PATCH] i965: Set dest type to UW for several send messages

[Jordan Justen]

Without this, on SIMD 16 the send instruction destination will appear
to write more than one destination register, causing the simulator to
report an error.

Of course, the send instruction can actually write more than one
destination register regardless of the type set for the destination,
so this is a bit strange.

Suggested-by: Kenneth Graunke <kenneth at whitecape.org>
Signed-off-by: Jordan Justen <jordan.l.justen at intel.com>
---
 src/mesa/drivers/dri/i965/brw_eu_emit.c        | 4 +++-
 src/mesa/drivers/dri/i965/brw_fs_generator.cpp | 2 +-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_eu_emit.c b/src/mesa/drivers/dri/i965/brw_eu_emit.c
index 35d8039..83b262b 100644
--- a/src/mesa/drivers/dri/i965/brw_eu_emit.c
+++ b/src/mesa/drivers/dri/i965/brw_eu_emit.c
@@ -2601,6 +2601,7 @@ brw_send_indirect_surface_message(struct brw_codegen *p,
       surface = addr;
    }
 
+   dst = retype(dst, BRW_REGISTER_TYPE_UW);
    insn = brw_send_indirect_message(p, sfid, dst, payload, surface);
    brw_inst_set_mlen(devinfo, insn, message_len);
    brw_inst_set_rlen(devinfo, insn, response_len);
@@ -3207,6 +3208,7 @@ brw_memory_fence(struct brw_codegen *p,
     * message doesn't write anything back.
     */
    insn = next_insn(p, BRW_OPCODE_SEND);
+   dst = retype(dst, BRW_REGISTER_TYPE_UW);
    brw_set_dest(p, insn, dst);
    brw_set_src0(p, insn, dst);
    brw_set_memory_fence_message(p, insn, GEN7_SFID_DATAPORT_DATA_CACHE,
@@ -3473,7 +3475,7 @@ brw_barrier(struct brw_codegen *p, struct brw_reg src)
    assert(devinfo->gen >= 7);
 
    inst = next_insn(p, BRW_OPCODE_SEND);
-   brw_set_dest(p, inst, brw_null_reg());
+   brw_set_dest(p, inst, retype(brw_null_reg(), BRW_REGISTER_TYPE_UW));
    brw_set_src0(p, inst, src);
    brw_set_src1(p, inst, brw_null_reg());
 
diff --git a/src/mesa/drivers/dri/i965/brw_fs_generator.cpp b/src/mesa/drivers/dri/i965/brw_fs_generator.cpp
index ef58584..b58c938 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_generator.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_generator.cpp
@@ -431,7 +431,7 @@ fs_generator::generate_cs_terminate(fs_inst *inst, struct brw_reg payload)
 
    insn = brw_next_insn(p, BRW_OPCODE_SEND);
 
-   brw_set_dest(p, insn, brw_null_reg());
+   brw_set_dest(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_UW));
    brw_set_src0(p, insn, payload);
    brw_set_src1(p, insn, brw_imm_d(0));
 
-- 
2.7.0