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      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    if (!gen_get_device_info(pciid, &gd->devinfo)) {
    105       free(gd);
    106       return NULL;
    107    }
    108 
    109    brw_init_compaction_tables(&gd->devinfo);
    110 
    111    return gd;
    112 }
    113 
    114 void
    115 gen_disasm_destroy(struct gen_disasm *disasm)
    116 {
    117    free(disasm);
    118 }
    119