intel/fs: Update location of Render Target Array Index for gen12

Render Target Array Index has moved from R0.0[26:16] to
R1.1[26:16] on gen12.

Fixes dEQP-VK.multiview.input_attachments.*

Cc: <mesa-stable@lists.freedesktop.org>
Reviewed-by: Francisco Jerez <currojerez@riseup.net>
Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4836>

diff --git a/src/intel/compiler/brw_fs_nir.cpp b/src/intel/compiler/brw_fs_nir.cpp
index e29ba744d8bda54b22797cd697678d5e3b4bf35f..e3149f6254c28208abcfbbbd73675367dacd221c 100644 (file)
--- a/src/intel/compiler/brw_fs_nir.cpp
+++ b/src/intel/compiler/brw_fs_nir.cpp
@@ -3162,7 +3162,15 @@ fs_visitor::nir_emit_gs_intrinsic(const fs_builder &bld,
 static fs_reg
 fetch_render_target_array_index(const fs_builder &bld)
 {
-   if (bld.shader->devinfo->gen >= 6) {
+   if (bld.shader->devinfo->gen >= 12) {
+      /* The render target array index is provided in the thread payload as
+       * bits 26:16 of r1.1.
+       */
+      const fs_reg idx = bld.vgrf(BRW_REGISTER_TYPE_UD);
+      bld.AND(idx, brw_uw1_reg(BRW_GENERAL_REGISTER_FILE, 1, 3),
+              brw_imm_uw(0x7ff));
+      return idx;
+   } else if (bld.shader->devinfo->gen >= 6) {
       /* The render target array index is provided in the thread payload as
        * bits 26:16 of r0.0.
        */