src/mesa/drivers/dri/i965/intel_asm_annotation.c

   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_context.h"
  27 #include "intel_debug.h"
  28 #include "intel_asm_annotation.h"
  29 #include "program/prog_print.h"
  30 #include "program/prog_instruction.h"
  31 #include "main/macros.h"
  32 #include "glsl/nir/nir.h"
  33
  34 void
  35 dump_assembly(void *assembly, int num_annotations, struct annotation *annotation,
  36               const struct brw_device_info *devinfo)
  37 {
  38    const char *last_annotation_string = NULL;
  39    const void *last_annotation_ir = NULL;
  40
  41    for (int i = 0; i < num_annotations; i++) {
  42       int start_offset = annotation[i].offset;
  43       int end_offset = annotation[i + 1].offset;
  44
  45       if (annotation[i].block_start) {
  46          fprintf(stderr, "   START B%d", annotation[i].block_start->num);
  47          foreach_list_typed(struct bblock_link, predecessor_link, link,
  48                             &annotation[i].block_start->parents) {
  49             struct bblock_t *predecessor_block = predecessor_link->block;
  50             fprintf(stderr, " <-B%d", predecessor_block->num);
  51          }
  52          fprintf(stderr, "\n");
  53       }
  54
  55       if (last_annotation_ir != annotation[i].ir) {
  56          last_annotation_ir = annotation[i].ir;
  57          if (last_annotation_ir) {
  58             fprintf(stderr, "   ");
  59             nir_print_instr(annotation[i].ir, stderr);
  60             fprintf(stderr, "\n");
  61          }
  62       }
  63
  64       if (last_annotation_string != annotation[i].annotation) {
  65          last_annotation_string = annotation[i].annotation;
  66          if (last_annotation_string)
  67             fprintf(stderr, "   %s\n", last_annotation_string);
  68       }
  69
  70       brw_disassemble(devinfo, assembly, start_offset, end_offset, stderr);
  71
  72       if (annotation[i].block_end) {
  73          fprintf(stderr, "   END B%d", annotation[i].block_end->num);
  74          foreach_list_typed(struct bblock_link, successor_link, link,
  75                             &annotation[i].block_end->children) {
  76             struct bblock_t *successor_block = successor_link->block;
  77             fprintf(stderr, " ->B%d", successor_block->num);
  78          }
  79          fprintf(stderr, "\n");
  80       }
  81    }
  82    fprintf(stderr, "\n");
  83 }
  84
  85 void annotate(const struct brw_device_info *devinfo,
  86               struct annotation_info *annotation, const struct cfg_t *cfg,
  87               struct backend_instruction *inst, unsigned offset)
  88 {
  89    if (annotation->ann_size <= annotation->ann_count) {
  90       int old_size = annotation->ann_size;
  91       annotation->ann_size = MAX2(1024, annotation->ann_size * 2);
  92       annotation->ann = reralloc(annotation->mem_ctx, annotation->ann,
  93                                  struct annotation, annotation->ann_size);
  94       if (!annotation->ann)
  95          return;
  96
  97       memset(annotation->ann + old_size, 0,
  98              (annotation->ann_size - old_size) * sizeof(struct annotation));
  99    }
 100
 101    struct annotation *ann = &annotation->ann[annotation->ann_count++];
 102    ann->offset = offset;
 103    if ((INTEL_DEBUG & DEBUG_ANNOTATION) != 0) {
 104       ann->ir = inst->ir;
 105       ann->annotation = inst->annotation;
 106    }
 107
 108    if (bblock_start(cfg->blocks[annotation->cur_block]) == inst) {
 109       ann->block_start = cfg->blocks[annotation->cur_block];
 110    }
 111
 112    /* There is no hardware DO instruction on Gen6+, so since DO always
 113     * starts a basic block, we need to set the .block_start of the next
 114     * instruction's annotation with a pointer to the bblock started by
 115     * the DO.
 116     *
 117     * There's also only complication from emitting an annotation without
 118     * a corresponding hardware instruction to disassemble.
 119     */
 120    if (devinfo->gen >= 6 && inst->opcode == BRW_OPCODE_DO) {
 121       annotation->ann_count--;
 122    }
 123
 124    if (bblock_end(cfg->blocks[annotation->cur_block]) == inst) {
 125       ann->block_end = cfg->blocks[annotation->cur_block];
 126       annotation->cur_block++;
 127    }
 128 }
 129
 130 void
 131 annotation_finalize(struct annotation_info *annotation,
 132                     unsigned next_inst_offset)
 133 {
 134    if (!annotation->ann_count)
 135       return;
 136
 137    if (annotation->ann_count == annotation->ann_size) {
 138       annotation->ann = reralloc(annotation->mem_ctx, annotation->ann,
 139                                  struct annotation, annotation->ann_size + 1);
 140    }
 141    annotation->ann[annotation->ann_count].offset = next_inst_offset;
 142 }