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
30 extern struct mir_op_props alu_opcode_props[256];
31 extern struct mir_ldst_op_props load_store_opcode_props[256];
32 extern struct mir_tag_props midgard_tag_props[16];
33
34 #define OP_IS_ATOMIC(op) (load_store_opcode_props[op].props & LDST_ATOMIC)
35 #define OP_IS_STORE(op) (load_store_opcode_props[op].props & LDST_STORE)
36 #define OP_HAS_ADDRESS(op) (load_store_opcode_props[op].props & LDST_ADDRESS)
37
38 /* Is this opcode that of an integer (regardless of signedness)? Instruction
39 * names authoritatively determine types */
40
41 static inline bool
midgard_is_integer_op(int op)42 midgard_is_integer_op(int op)
43 {
44 const char *name = alu_opcode_props[op].name;
45
46 if (!name)
47 return false;
48
49 return (name[0] == 'i') || (name[0] == 'u');
50 }
51
52 /* Does this opcode *write* an integer? Same as is_integer_op, unless it's a
53 * conversion between int<->float in which case we do the opposite */
54
55 static inline bool
midgard_is_integer_out_op(int op)56 midgard_is_integer_out_op(int op)
57 {
58 bool is_int = midgard_is_integer_op(op);
59 bool is_conversion = alu_opcode_props[op].props & OP_TYPE_CONVERT;
60
61 return is_int ^ is_conversion;
62 }
63
64 /* Determines effective writemask, taking quirks and expansion into account */
65
66 static inline unsigned
effective_writemask(midgard_alu_op op,unsigned existing_mask)67 effective_writemask(midgard_alu_op op, unsigned existing_mask)
68 {
69 /* Channel count is off-by-one to fit in two-bits (0 channel makes no
70 * sense) */
71
72 unsigned channel_count = GET_CHANNEL_COUNT(alu_opcode_props[op].props);
73
74 /* If there is a fixed channel count, construct the appropriate mask */
75
76 if (channel_count)
77 return (1 << channel_count) - 1;
78
79 return existing_mask;
80 };
81
82 #endif
83