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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