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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 FROM,
20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21  * SOFTWARE.
22  *
23  * Authors (Collabora):
24  *      Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
25  */
26 
27 #include "pan_ir.h"
28 #include "util/macros.h"
29 
30 /* Converts a per-component mask to a byte mask */
31 
32 uint16_t
pan_to_bytemask(unsigned bytes,unsigned mask)33 pan_to_bytemask(unsigned bytes, unsigned mask)
34 {
35         switch (bytes) {
36         case 0:
37                 assert(mask == 0);
38                 return 0;
39 
40         case 8:
41                 return mask;
42 
43         case 16: {
44                 unsigned space =
45                         (mask & 0x1) |
46                         ((mask & 0x2) << (2 - 1)) |
47                         ((mask & 0x4) << (4 - 2)) |
48                         ((mask & 0x8) << (6 - 3)) |
49                         ((mask & 0x10) << (8 - 4)) |
50                         ((mask & 0x20) << (10 - 5)) |
51                         ((mask & 0x40) << (12 - 6)) |
52                         ((mask & 0x80) << (14 - 7));
53 
54                 return space | (space << 1);
55         }
56 
57         case 32: {
58                 unsigned space =
59                         (mask & 0x1) |
60                         ((mask & 0x2) << (4 - 1)) |
61                         ((mask & 0x4) << (8 - 2)) |
62                         ((mask & 0x8) << (12 - 3));
63 
64                 return space | (space << 1) | (space << 2) | (space << 3);
65         }
66 
67         case 64: {
68                 unsigned A = (mask & 0x1) ? 0xFF : 0x00;
69                 unsigned B = (mask & 0x2) ? 0xFF : 0x00;
70                 return A | (B << 8);
71         }
72 
73         default:
74                 unreachable("Invalid register mode");
75         }
76 }
77 
78 void
pan_block_add_successor(pan_block * block,pan_block * successor)79 pan_block_add_successor(pan_block *block, pan_block *successor)
80 {
81         assert(block);
82         assert(successor);
83 
84         /* Cull impossible edges */
85         if (block->unconditional_jumps)
86                 return;
87 
88         for (unsigned i = 0; i < ARRAY_SIZE(block->successors); ++i) {
89                 if (block->successors[i]) {
90                        if (block->successors[i] == successor)
91                                return;
92                        else
93                                continue;
94                 }
95 
96                 block->successors[i] = successor;
97                 _mesa_set_add(successor->predecessors, block);
98                 return;
99         }
100 
101         unreachable("Too many successors");
102 }
103 
104 /* Prints a NIR ALU type in Bifrost-style ".f32" ".i8" etc */
105 
106 void
pan_print_alu_type(nir_alu_type t,FILE * fp)107 pan_print_alu_type(nir_alu_type t, FILE *fp)
108 {
109         unsigned size = nir_alu_type_get_type_size(t);
110         nir_alu_type base = nir_alu_type_get_base_type(t);
111 
112         switch (base) {
113         case nir_type_int:
114                 fprintf(fp, ".i");
115                 break;
116         case nir_type_uint:
117                 fprintf(fp, ".u");
118                 break;
119         case nir_type_bool:
120                 fprintf(fp, ".b");
121                 break;
122         case nir_type_float:
123                 fprintf(fp, ".f");
124                 break;
125         default:
126                 fprintf(fp, ".unknown");
127                 break;
128         }
129 
130         fprintf(fp, "%u", size);
131 }
132