1/* Copyright (c) 2018-2019 Alyssa Rosenzweig (alyssa@rosenzweig.io)
2 * Copyright (C) 2019-2020 Collabora, Ltd.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to deal
6 * in the Software without restriction, including without limitation the rights
7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 * copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
20 * THE SOFTWARE.
21 */
22
23#ifndef __MIDGARD_OPS
24#define __MIDGARD_OPS
25
26#include "helpers.h"
27
28/* Forward declare */
29
30extern struct mir_op_props alu_opcode_props[256];
31extern struct mir_ldst_op_props load_store_opcode_props[256];
32extern struct mir_tex_op_props tex_opcode_props[16];
33extern struct mir_tag_props midgard_tag_props[16];
34
35#define OP_IS_ATOMIC(op) (load_store_opcode_props[op].props & LDST_ATOMIC)
36#define OP_USES_ATTRIB(op) (load_store_opcode_props[op].props & LDST_ATTRIB)
37#define OP_IS_STORE(op) (load_store_opcode_props[op].props & LDST_STORE)
38#define OP_HAS_ADDRESS(op) (load_store_opcode_props[op].props & LDST_ADDRESS)
39
40/* Is this opcode that of an integer (regardless of signedness)? Instruction
41 * names authoritatively determine types */
42
43static inline bool
44midgard_is_integer_op(int op)
45{
46        return (op >= 0x40 && op <= 0x7E) || (op >= 0xA0 && op <= 0xC1);
47}
48
49static inline bool
50midgard_is_unsigned_op(int op)
51{
52        assert(midgard_is_integer_op(op));
53
54        switch (op) {
55        case midgard_alu_op_uaddsat:
56        case midgard_alu_op_usubsat:
57        case midgard_alu_op_uwmul:
58        case midgard_alu_op_umin:
59        case midgard_alu_op_umax:
60        case midgard_alu_op_uavg:
61        case midgard_alu_op_uravg:
62        case midgard_alu_op_ushlsat:
63        case midgard_alu_op_uabsdiff:
64        case midgard_alu_op_ult:
65        case midgard_alu_op_ule:
66        case midgard_alu_op_uball_lt:
67        case midgard_alu_op_uball_lte:
68        case midgard_alu_op_ubany_lt:
69        case midgard_alu_op_ubany_lte:
70        case midgard_alu_op_u2f_rte:
71        case midgard_alu_op_u2f_rtz:
72        case midgard_alu_op_u2f_rtn:
73        case midgard_alu_op_u2f_rtp:
74                return true;
75        default:
76                return false;
77        }
78}
79
80/* Does this opcode *write* an integer? Same as is_integer_op, unless it's a
81 * conversion between int<->float in which case we do the opposite */
82
83static inline bool
84midgard_is_integer_out_op(int op)
85{
86        bool is_int = midgard_is_integer_op(op);
87        bool is_conversion = alu_opcode_props[op].props & OP_TYPE_CONVERT;
88
89        return is_int ^ is_conversion;
90}
91
92/* Determines effective writemask, taking quirks and expansion into account */
93
94static inline unsigned
95effective_writemask(midgard_alu_op op, unsigned existing_mask)
96{
97        /* Channel count is off-by-one to fit in two-bits (0 channel makes no
98         * sense) */
99
100        unsigned channel_count = GET_CHANNEL_COUNT(alu_opcode_props[op].props);
101
102        /* If there is a fixed channel count, construct the appropriate mask */
103
104        if (channel_count)
105                return (1 << channel_count) - 1;
106
107        return existing_mask;
108};
109
110#endif
111