1 /*
2 * Copyright (C) 2019-2020 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 FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 * SOFTWARE.
22 */
23
24 #ifndef __BI_QUIRKS_H
25 #define __BI_QUIRKS_H
26
27 /* Model-specific quirks requiring compiler workarounds/etc. Quirks
28 * may be errata requiring a workaround, or features. We're trying to be
29 * quirk-positive here; quirky is the best! */
30
31 /* Whether this GPU lacks support for fp32 transcendentals, requiring backend
32 * lowering to low-precision lookup tables and polynomial approximation */
33
34 #define BIFROST_NO_FP32_TRANSCENDENTALS (1 << 0)
35
36 /* Whether this GPU lacks support for the full form of the CLPER instruction.
37 * These GPUs use a simple encoding of CLPER that does not support
38 * inactive_result, subgroup_size, or lane_op. Using those features requires
39 * lowering to additional ALU instructions. The encoding forces inactive_result
40 * = zero, subgroup_size = subgroup4, and lane_op = none. */
41
42 #define BIFROST_LIMITED_CLPER (1 << 1)
43
44 static inline unsigned
bifrost_get_quirks(unsigned product_id)45 bifrost_get_quirks(unsigned product_id)
46 {
47 switch (product_id >> 8) {
48 case 0x60: /* G71 */
49 return BIFROST_NO_FP32_TRANSCENDENTALS | BIFROST_LIMITED_CLPER;
50 case 0x62: /* G72 */
51 case 0x70: /* G31 */
52 return BIFROST_LIMITED_CLPER;
53 default:
54 return 0;
55 }
56 }
57
58 #endif
59