src/intel/tools/disasm.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 <stdlib.h>
  25
  26 #include "brw_context.h"
  27 #include "brw_inst.h"
  28 #include "brw_eu.h"
  29
  30 #include "gen_disasm.h"
  31
  32 uint64_t INTEL_DEBUG;
  33
  34 struct gen_disasm {
  35     struct gen_device_info devinfo;
  36 };
  37
  38 static bool
  39 is_send(uint32_t opcode)
  40 {
  41    return (opcode == BRW_OPCODE_SEND  ||
  42            opcode == BRW_OPCODE_SENDC ||
  43            opcode == BRW_OPCODE_SENDS ||
  44            opcode == BRW_OPCODE_SENDSC );
  45 }
  46
  47 void
  48 gen_disasm_disassemble(struct gen_disasm *disasm, void *assembly,
  49                        int start, FILE *out)
  50 {
  51    struct gen_device_info *devinfo = &disasm->devinfo;
  52    bool dump_hex = false;
  53    int offset = start;
  54
  55    /* This loop exits when send-with-EOT or when opcode is 0 */
  56    while (true) {
  57       brw_inst *insn = assembly + offset;
  58       brw_inst uncompacted;
  59       bool compacted = brw_inst_cmpt_control(devinfo, insn);
  60       if (0)
  61          fprintf(out, "0x%08x: ", offset);
  62
  63       if (compacted) {
  64          brw_compact_inst *compacted = (void *)insn;
  65          if (dump_hex) {
  66             fprintf(out, "0x%08x 0x%08x                       ",
  67                    ((uint32_t *)insn)[1],
  68                    ((uint32_t *)insn)[0]);
  69          }
  70
  71          brw_uncompact_instruction(devinfo, &uncompacted, compacted);
  72          insn = &uncompacted;
  73          offset += 8;
  74       } else {
  75          if (dump_hex) {
  76             fprintf(out, "0x%08x 0x%08x 0x%08x 0x%08x ",
  77                    ((uint32_t *)insn)[3],
  78                    ((uint32_t *)insn)[2],
  79                    ((uint32_t *)insn)[1],
  80                    ((uint32_t *)insn)[0]);
  81          }
  82          offset += 16;
  83       }
  84
  85       brw_disassemble_inst(out, devinfo, insn, compacted);
  86
  87       /* Simplistic, but efficient way to terminate disasm */
  88       uint32_t opcode = brw_inst_opcode(devinfo, insn);
  89       if (opcode == 0 || (is_send(opcode) && brw_inst_eot(devinfo, insn))) {
  90          break;
  91       }
  92    }
  93 }
  94
  95 struct gen_disasm *
  96 gen_disasm_create(int pciid)
  97 {
  98    struct gen_disasm *gd;
  99
 100    gd = malloc(sizeof *gd);
 101    if (gd == NULL)
 102       return NULL;
 103
 104    gd->devinfo = *gen_get_device_info(pciid);
 105    brw_init_compaction_tables(&gd->devinfo);
 106
 107    return gd;
 108 }
 109
 110 void
 111 gen_disasm_destroy(struct gen_disasm *disasm)
 112 {
 113    free(disasm);
 114 }