1 /*
2 * Copyright (C) 2020 Collabora, Ltd.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 *
23 * Authors (Collabora):
24 * Italo Nicola <[email protected]>
25 */
26
27 #include "compiler/nir/nir.h"
28 #include "compiler/nir/nir_builder.h"
29 #include "midgard_nir.h"
30
31 static bool
nir_lower_image_bitsize(nir_builder * b,nir_intrinsic_instr * intr,UNUSED void * data)32 nir_lower_image_bitsize(nir_builder *b, nir_intrinsic_instr *intr,
33 UNUSED void *data)
34 {
35 switch (intr->intrinsic) {
36 case nir_intrinsic_image_load:
37 case nir_intrinsic_image_store:
38 case nir_intrinsic_image_texel_address:
39 break;
40 default:
41 return false;
42 }
43
44 if (nir_src_bit_size(intr->src[1]) == 16)
45 return false;
46
47 b->cursor = nir_before_instr(&intr->instr);
48
49 nir_def *coord = intr->src[1].ssa;
50
51 nir_def *coord16 = nir_u2u16(b, coord);
52
53 nir_src_rewrite(&intr->src[1], coord16);
54
55 return true;
56 }
57
58 bool
midgard_nir_lower_image_bitsize(nir_shader * shader)59 midgard_nir_lower_image_bitsize(nir_shader *shader)
60 {
61 return nir_shader_intrinsics_pass(
62 shader, nir_lower_image_bitsize,
63 nir_metadata_control_flow, NULL);
64 }
65