src/compiler/codegen/x86/ArchUtility.cc

/*
 * Copyright (C) 2012 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "../../CompilerInternals.h"
#include "X86LIR.h"
#include "../Ralloc.h"

#include <string>

namespace art {

/* For dumping instructions */
static const char* x86RegName[] = {
    "rax", "rcx", "rdx", "rbx", "rsp", "rbp", "rsi", "rdi",
    "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15"
};

static const char* x86CondName[] = {
    "O",
    "NO",
    "B/NAE/C",
    "NB/AE/NC",
    "Z/EQ",
    "NZ/NE",
    "BE/NA",
    "NBE/A",
    "S",
    "NS",
    "P/PE",
    "NP/PO",
    "L/NGE",
    "NL/GE",
    "LE/NG",
    "NLE/G"
};

/*
 * Interpret a format string and build a string no longer than size
 * See format key in Assemble.c.
 */
std::string buildInsnString(const char *fmt, LIR *lir, unsigned char* baseAddr) {
  std::string buf;
  size_t i = 0;
  size_t fmt_len = strlen(fmt);
  while (i < fmt_len) {
    if (fmt[i] != '!') {
      buf += fmt[i];
      i++;
    } else {
      i++;
      DCHECK_LT(i, fmt_len);
      char operand_number_ch = fmt[i];
      i++;
      if (operand_number_ch == '!') {
        buf += "!";
      } else {
        int operand_number = operand_number_ch - '0';
        DCHECK_LT(operand_number, 6);  // Expect upto 6 LIR operands.
        DCHECK_LT(i, fmt_len);
        int operand = lir->operands[operand_number];
        switch (fmt[i]) {
          case 'c':
            DCHECK_LT(static_cast<size_t>(operand), sizeof(x86CondName));
            buf += x86CondName[operand];
            break;
          case 'd':
            buf += StringPrintf("%d", operand);
            break;
          case 'r':
            if (FPREG(operand) || DOUBLEREG(operand)) {
              int fp_reg = operand & FP_REG_MASK;
              buf += StringPrintf("xmm%d", fp_reg);
            } else {
              DCHECK_LT(static_cast<size_t>(operand), sizeof(x86RegName));
              buf += x86RegName[operand];
            }
            break;
          case 't':
            buf += StringPrintf("0x%08x (L%p)",
                                reinterpret_cast<uint32_t>(baseAddr) + lir->offset + operand,
                                lir->target);
            break;
          default:
            buf += StringPrintf("DecodeError '%c'", fmt[i]);
            break;
        }
        i++;
      }
    }
  }
  return buf;
}

void oatDumpResourceMask(LIR *lir, u8 mask, const char *prefix)
{
    char buf[256];
    buf[0] = 0;
    LIR *x86LIR = (LIR *) lir;

    if (mask == ENCODE_ALL) {
        strcpy(buf, "all");
    } else {
        char num[8];
        int i;

        for (i = 0; i < kRegEnd; i++) {
            if (mask & (1ULL << i)) {
                sprintf(num, "%d ", i);
                strcat(buf, num);
            }
        }

        if (mask & ENCODE_CCODE) {
            strcat(buf, "cc ");
        }
        /* Memory bits */
        if (x86LIR && (mask & ENCODE_DALVIK_REG)) {
            sprintf(buf + strlen(buf), "dr%d%s", x86LIR->aliasInfo & 0xffff,
                    (x86LIR->aliasInfo & 0x80000000) ? "(+1)" : "");
        }
        if (mask & ENCODE_LITERAL) {
            strcat(buf, "lit ");
        }

        if (mask & ENCODE_HEAP_REF) {
            strcat(buf, "heap ");
        }
        if (mask & ENCODE_MUST_NOT_ALIAS) {
            strcat(buf, "noalias ");
        }
    }
    if (buf[0]) {
        LOG(INFO) << prefix << ": " <<  buf;
    }
}

} // namespace art