1 /*
2 * Copyright © 2014 Intel Corporation
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
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 */
23
24 #include <stdlib.h>
25
26 #include "compiler/brw_inst.h"
27 #include "compiler/brw_eu.h"
28
29 #include "gen_disasm.h"
30
31 uint64_t INTEL_DEBUG;
32
33 struct gen_disasm {
34 struct gen_device_info devinfo;
35 };
36
37 static bool
is_send(uint32_t opcode)38 is_send(uint32_t opcode)
39 {
40 return (opcode == BRW_OPCODE_SEND ||
41 opcode == BRW_OPCODE_SENDC ||
42 opcode == BRW_OPCODE_SENDS ||
43 opcode == BRW_OPCODE_SENDSC );
44 }
45
46 static int
gen_disasm_find_end(struct gen_disasm * disasm,void * assembly,int start)47 gen_disasm_find_end(struct gen_disasm *disasm, void *assembly, int start)
48 {
49 struct gen_device_info *devinfo = &disasm->devinfo;
50 int offset = start;
51
52 /* This loop exits when send-with-EOT or when opcode is 0 */
53 while (true) {
54 brw_inst *insn = assembly + offset;
55
56 if (brw_inst_cmpt_control(devinfo, insn)) {
57 offset += 8;
58 } else {
59 offset += 16;
60 }
61
62 /* Simplistic, but efficient way to terminate disasm */
63 uint32_t opcode = brw_inst_opcode(devinfo, insn);
64 if (opcode == 0 || (is_send(opcode) && brw_inst_eot(devinfo, insn))) {
65 break;
66 }
67 }
68
69 return offset;
70 }
71
72 void
gen_disasm_disassemble(struct gen_disasm * disasm,void * assembly,int start,FILE * out)73 gen_disasm_disassemble(struct gen_disasm *disasm, void *assembly,
74 int start, FILE *out)
75 {
76 struct gen_device_info *devinfo = &disasm->devinfo;
77 int end = gen_disasm_find_end(disasm, assembly, start);
78
79 /* Make a dummy disasm structure that brw_validate_instructions
80 * can work from.
81 */
82 struct disasm_info *disasm_info = disasm_initialize(devinfo, NULL);
83 disasm_new_inst_group(disasm_info, start);
84 disasm_new_inst_group(disasm_info, end);
85
86 brw_validate_instructions(devinfo, assembly, start, end, disasm_info);
87
88 foreach_list_typed(struct inst_group, group, link,
89 &disasm_info->group_list) {
90 struct exec_node *next_node = exec_node_get_next(&group->link);
91 if (exec_node_is_tail_sentinel(next_node))
92 break;
93
94 struct inst_group *next =
95 exec_node_data(struct inst_group, next_node, link);
96
97 int start_offset = group->offset;
98 int end_offset = next->offset;
99
100 brw_disassemble(devinfo, assembly, start_offset, end_offset, out);
101
102 if (group->error) {
103 fputs(group->error, out);
104 }
105 }
106
107 ralloc_free(disasm_info);
108 }
109
110 struct gen_disasm *
gen_disasm_create(const struct gen_device_info * devinfo)111 gen_disasm_create(const struct gen_device_info *devinfo)
112 {
113 struct gen_disasm *gd;
114
115 gd = malloc(sizeof *gd);
116 if (gd == NULL)
117 return NULL;
118
119 gd->devinfo = *devinfo;
120
121 brw_init_compaction_tables(&gd->devinfo);
122
123 return gd;
124 }
125
126 void
gen_disasm_destroy(struct gen_disasm * disasm)127 gen_disasm_destroy(struct gen_disasm *disasm)
128 {
129 free(disasm);
130 }
131