--- /dev/null
+/*
+ * Copyright (C) 2020 Collabora, Ltd.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors (Collabora):
+ * Italo Nicola <italonicola@collabora.com>
+ */
+
+#include "compiler/nir/nir.h"
+#include "compiler/nir/nir_builder.h"
+#include "midgard_nir.h"
+
+static bool
+nir_lower_image_bitsize(nir_builder *b, nir_instr *instr, UNUSED void *data)
+{
+ if (instr->type != nir_instr_type_intrinsic)
+ return false;
+
+ nir_intrinsic_instr *intr = nir_instr_as_intrinsic(instr);
+
+ switch (intr->intrinsic) {
+ case nir_intrinsic_image_load:
+ case nir_intrinsic_image_store:
+ case nir_intrinsic_image_atomic_add:
+ case nir_intrinsic_image_atomic_and:
+ case nir_intrinsic_image_atomic_comp_swap:
+ case nir_intrinsic_image_atomic_exchange:
+ case nir_intrinsic_image_atomic_imax:
+ case nir_intrinsic_image_atomic_imin:
+ case nir_intrinsic_image_atomic_or:
+ case nir_intrinsic_image_atomic_umax:
+ case nir_intrinsic_image_atomic_umin:
+ case nir_intrinsic_image_atomic_xor:
+ break;
+ default:
+ return false;
+ }
+
+ if (nir_src_bit_size(intr->src[1]) == 16)
+ return false;
+
+ b->cursor = nir_before_instr(instr);
+
+ nir_ssa_def *coord =
+ nir_ssa_for_src(b, intr->src[1],
+ nir_src_num_components(intr->src[1]));
+
+ nir_ssa_def *coord16 = nir_u2u16(b, coord);
+
+ nir_instr_rewrite_src(instr, &intr->src[1], nir_src_for_ssa(coord16));
+
+ return true;
+}
+
+bool
+midgard_nir_lower_image_bitsize(nir_shader *shader)
+{
+ return nir_shader_instructions_pass(shader,
+ nir_lower_image_bitsize,
+ nir_metadata_block_index | nir_metadata_dominance,
+ NULL);
+}