Mesa (main): ir3/lower_subgroups: Support 16-bit READ_* sources

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Module: Mesa
Branch: main
Commit: bf0013f3c54f2f6a3748bc1637585b49f09de1f4
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=bf0013f3c54f2f6a3748bc1637585b49f09de1f4

Author: Connor Abbott <cwabbott0 at gmail.com>
Date:   Fri Oct  8 18:03:05 2021 +0200

ir3/lower_subgroups: Support 16-bit READ_* sources

With VK_EXT_shader_subgroup_extended_types these will have 16-bit
sources that need to be expanded to 32-bit (and then narrowed again).

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13271>

---

 src/freedreno/ir3/ir3_lower_subgroups.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/freedreno/ir3/ir3_lower_subgroups.c b/src/freedreno/ir3/ir3_lower_subgroups.c
index 84235cea917..b5295357059 100644
--- a/src/freedreno/ir3/ir3_lower_subgroups.c
+++ b/src/freedreno/ir3/ir3_lower_subgroups.c
@@ -218,7 +218,9 @@ lower_block(struct ir3 *ir, struct ir3_block **block)
          ir3_dst_create(mov, instr->dsts[0]->num, instr->dsts[0]->flags);
          struct ir3_register *new_src = ir3_src_create(mov, 0, 0);
          *new_src = *instr->srcs[src];
-         mov->cat1.dst_type = mov->cat1.src_type = TYPE_U32;
+         mov->cat1.dst_type = TYPE_U32;
+         mov->cat1.src_type =
+            (new_src->flags & IR3_REG_HALF) ? TYPE_U16 : TYPE_U32;
          break;
       }