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 "intel_disasm.h"
30
31 static bool
is_send(uint32_t opcode)32 is_send(uint32_t opcode)
33 {
34 return (opcode == BRW_OPCODE_SEND ||
35 opcode == BRW_OPCODE_SENDC ||
36 opcode == BRW_OPCODE_SENDS ||
37 opcode == BRW_OPCODE_SENDSC );
38 }
39
40 static int
intel_disasm_find_end(const struct intel_device_info * devinfo,const void * assembly,int start)41 intel_disasm_find_end(const struct intel_device_info *devinfo,
42 const void *assembly, int start)
43 {
44 int offset = start;
45
46 /* This loop exits when send-with-EOT or when opcode is 0 */
47 while (true) {
48 const brw_inst *insn = assembly + offset;
49
50 if (brw_inst_cmpt_control(devinfo, insn)) {
51 offset += 8;
52 } else {
53 offset += 16;
54 }
55
56 /* Simplistic, but efficient way to terminate disasm */
57 uint32_t opcode = brw_inst_opcode(devinfo, insn);
58 if (opcode == 0 || (is_send(opcode) && brw_inst_eot(devinfo, insn))) {
59 break;
60 }
61 }
62
63 return offset;
64 }
65
66 void
intel_disassemble(const struct intel_device_info * devinfo,const void * assembly,int start,FILE * out)67 intel_disassemble(const struct intel_device_info *devinfo,
68 const void *assembly, int start, FILE *out)
69 {
70 int end = intel_disasm_find_end(devinfo, assembly, start);
71
72 /* Make a dummy disasm structure that brw_validate_instructions
73 * can work from.
74 */
75 struct disasm_info *disasm_info = disasm_initialize(devinfo, NULL);
76 disasm_new_inst_group(disasm_info, start);
77 disasm_new_inst_group(disasm_info, end);
78
79 brw_validate_instructions(devinfo, assembly, start, end, disasm_info);
80
81 void *mem_ctx = ralloc_context(NULL);
82 const struct brw_label *root_label =
83 brw_label_assembly(devinfo, assembly, start, end, mem_ctx);
84
85 foreach_list_typed(struct inst_group, group, link,
86 &disasm_info->group_list) {
87 struct exec_node *next_node = exec_node_get_next(&group->link);
88 if (exec_node_is_tail_sentinel(next_node))
89 break;
90
91 struct inst_group *next =
92 exec_node_data(struct inst_group, next_node, link);
93
94 int start_offset = group->offset;
95 int end_offset = next->offset;
96
97 brw_disassemble(devinfo, assembly, start_offset, end_offset,
98 root_label, out);
99
100 if (group->error) {
101 fputs(group->error, out);
102 }
103 }
104
105 ralloc_free(mem_ctx);
106 ralloc_free(disasm_info);
107 }
108