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 "brw_cfg.h"
25 #include "brw_eu.h"
26 #include "brw_disasm_info.h"
27 #include "dev/gen_debug.h"
28 #include "compiler/nir/nir.h"
29
nir_print_instr(UNUSED const nir_instr * instr,UNUSED FILE * fp)30 __attribute__((weak)) void nir_print_instr(UNUSED const nir_instr *instr,
31 UNUSED FILE *fp) {}
32
33 void
dump_assembly(void * assembly,int start_offset,int end_offset,struct disasm_info * disasm,const unsigned * block_latency)34 dump_assembly(void *assembly, int start_offset, int end_offset,
35 struct disasm_info *disasm, const unsigned *block_latency)
36 {
37 const struct gen_device_info *devinfo = disasm->devinfo;
38 const char *last_annotation_string = NULL;
39 const void *last_annotation_ir = NULL;
40
41 void *mem_ctx = ralloc_context(NULL);
42 const struct brw_label *root_label =
43 brw_label_assembly(devinfo, assembly, start_offset, end_offset, mem_ctx);
44
45 foreach_list_typed(struct inst_group, group, link, &disasm->group_list) {
46 struct exec_node *next_node = exec_node_get_next(&group->link);
47 if (exec_node_is_tail_sentinel(next_node))
48 break;
49
50 struct inst_group *next =
51 exec_node_data(struct inst_group, next_node, link);
52
53 int start_offset = group->offset;
54 int end_offset = next->offset;
55
56 if (group->block_start) {
57 fprintf(stderr, " START B%d", group->block_start->num);
58 foreach_list_typed(struct bblock_link, predecessor_link, link,
59 &group->block_start->parents) {
60 struct bblock_t *predecessor_block = predecessor_link->block;
61 fprintf(stderr, " <-B%d", predecessor_block->num);
62 }
63 if (block_latency)
64 fprintf(stderr, " (%u cycles)",
65 block_latency[group->block_start->num]);
66 fprintf(stderr, "\n");
67 }
68
69 if (last_annotation_ir != group->ir) {
70 last_annotation_ir = group->ir;
71 if (last_annotation_ir) {
72 fprintf(stderr, " ");
73 nir_print_instr(group->ir, stderr);
74 fprintf(stderr, "\n");
75 }
76 }
77
78 if (last_annotation_string != group->annotation) {
79 last_annotation_string = group->annotation;
80 if (last_annotation_string)
81 fprintf(stderr, " %s\n", last_annotation_string);
82 }
83
84 brw_disassemble(devinfo, assembly, start_offset, end_offset,
85 root_label, stderr);
86
87 if (group->error) {
88 fputs(group->error, stderr);
89 }
90
91 if (group->block_end) {
92 fprintf(stderr, " END B%d", group->block_end->num);
93 foreach_list_typed(struct bblock_link, successor_link, link,
94 &group->block_end->children) {
95 struct bblock_t *successor_block = successor_link->block;
96 fprintf(stderr, " ->B%d", successor_block->num);
97 }
98 fprintf(stderr, "\n");
99 }
100 }
101 fprintf(stderr, "\n");
102
103 ralloc_free(mem_ctx);
104 }
105
106 struct disasm_info *
disasm_initialize(const struct gen_device_info * devinfo,const struct cfg_t * cfg)107 disasm_initialize(const struct gen_device_info *devinfo,
108 const struct cfg_t *cfg)
109 {
110 struct disasm_info *disasm = ralloc(NULL, struct disasm_info);
111 exec_list_make_empty(&disasm->group_list);
112 disasm->devinfo = devinfo;
113 disasm->cfg = cfg;
114 disasm->cur_block = 0;
115 disasm->use_tail = false;
116 return disasm;
117 }
118
119 struct inst_group *
disasm_new_inst_group(struct disasm_info * disasm,unsigned next_inst_offset)120 disasm_new_inst_group(struct disasm_info *disasm, unsigned next_inst_offset)
121 {
122 struct inst_group *tail = rzalloc(disasm, struct inst_group);
123 tail->offset = next_inst_offset;
124 exec_list_push_tail(&disasm->group_list, &tail->link);
125 return tail;
126 }
127
128 void
disasm_annotate(struct disasm_info * disasm,struct backend_instruction * inst,unsigned offset)129 disasm_annotate(struct disasm_info *disasm,
130 struct backend_instruction *inst, unsigned offset)
131 {
132 const struct gen_device_info *devinfo = disasm->devinfo;
133 const struct cfg_t *cfg = disasm->cfg;
134
135 struct inst_group *group;
136 if (!disasm->use_tail) {
137 group = disasm_new_inst_group(disasm, offset);
138 } else {
139 disasm->use_tail = false;
140 group = exec_node_data(struct inst_group,
141 exec_list_get_tail_raw(&disasm->group_list), link);
142 }
143
144 if ((INTEL_DEBUG & DEBUG_ANNOTATION) != 0) {
145 group->ir = inst->ir;
146 group->annotation = inst->annotation;
147 }
148
149 if (bblock_start(cfg->blocks[disasm->cur_block]) == inst) {
150 group->block_start = cfg->blocks[disasm->cur_block];
151 }
152
153 /* There is no hardware DO instruction on Gen6+, so since DO always
154 * starts a basic block, we need to set the .block_start of the next
155 * instruction's annotation with a pointer to the bblock started by
156 * the DO.
157 *
158 * There's also only complication from emitting an annotation without
159 * a corresponding hardware instruction to disassemble.
160 */
161 if (devinfo->gen >= 6 && inst->opcode == BRW_OPCODE_DO) {
162 disasm->use_tail = true;
163 }
164
165 if (bblock_end(cfg->blocks[disasm->cur_block]) == inst) {
166 group->block_end = cfg->blocks[disasm->cur_block];
167 disasm->cur_block++;
168 }
169 }
170
171 void
disasm_insert_error(struct disasm_info * disasm,unsigned offset,const char * error)172 disasm_insert_error(struct disasm_info *disasm, unsigned offset,
173 const char *error)
174 {
175 foreach_list_typed(struct inst_group, cur, link, &disasm->group_list) {
176 struct exec_node *next_node = exec_node_get_next(&cur->link);
177 if (exec_node_is_tail_sentinel(next_node))
178 break;
179
180 struct inst_group *next =
181 exec_node_data(struct inst_group, next_node, link);
182
183 if (next->offset <= offset)
184 continue;
185
186 if (offset + sizeof(brw_inst) != next->offset) {
187 struct inst_group *new = ralloc(disasm, struct inst_group);
188 memcpy(new, cur, sizeof(struct inst_group));
189
190 cur->error = NULL;
191 cur->error_length = 0;
192 cur->block_end = NULL;
193
194 new->offset = offset + sizeof(brw_inst);
195 new->block_start = NULL;
196
197 exec_node_insert_after(&cur->link, &new->link);
198 }
199
200 if (cur->error)
201 ralloc_strcat(&cur->error, error);
202 else
203 cur->error = ralloc_strdup(disasm, error);
204 return;
205 }
206 }
207